21-Nov-18 12:40 AM wooooOOOOOOOOooooOoooooooooooO 21-Nov-18 12:41 AM Yup. Nicely done. 21-Nov-18 12:41 AM continues lurking and struggling at msp430 assembly 21-Nov-18 12:41 AM Whenever a server gets an o-t channel, it's already too late 21-Nov-18 12:41 AM doom, doom, doom 21-Nov-18 12:41 AM @iximeow microcorruption? 21-Nov-18 12:41 AM this server is like not even.. three days? old? 21-Nov-18 12:41 AM Never tried msp430. 21-Nov-18 12:41 AM /still misses all the coffee culture, altough @N00N tried hard to mitigate that/ 21-Nov-18 12:41 AM we blinked and now there's 50 people in here 21-Nov-18 12:41 AM Fo Corpse! 21-Nov-18 12:42 AM @hedgeberg yeah i've been at the last one for ... two years, but finally got a kick in the butt to figure it out 21-Nov-18 12:42 AM Which wasn't exactly what we were expecting 21-Nov-18 12:42 AM Yeah that will happen with sci Twitter 21-Nov-18 12:42 AM i kinda was tbch 21-Nov-18 12:42 AM And/or Infosec Twitter 21-Nov-18 12:42 AM When we started reswitched, we went from 10 users to 300 in 2 days 21-Nov-18 12:42 AM i might go ahead and plug this place a couple times on my twitter 'cos i personally do not think there are enough colorful gay animal people here 21-Nov-18 12:42 AM also a couple of 'em are like extremely in this space so it makes a sense 21-Nov-18 12:43 AM qualia your display pic is not colorful... 21-Nov-18 12:43 AM The ratio was significantly higher in the beginning 21-Nov-18 12:43 AM initially it was me and you 21-Nov-18 12:43 AM that's like 50% 21-Nov-18 12:43 AM As I said 21-Nov-18 12:43 AM :D 21-Nov-18 12:43 AM lol 21-Nov-18 12:43 AM \o/ 21-Nov-18 12:43 AM @iximeow yeah well neither is !! yours !!!!! 21-Nov-18 12:43 AM If I am queer and arguably colorful but not an animal people,.do I count 21-Nov-18 12:43 AM ? 21-Nov-18 12:43 AM wait actually it kinda is 21-Nov-18 12:43 AM Yeah, I've always wondered, how come there are so many lgbt+ people in the hacker/maker community? 21-Nov-18 12:44 AM mine has reds and oranges and ITS A FISH 21-Nov-18 12:44 AM what the heck it's ascii art 21-Nov-18 12:44 AM YEAH 21-Nov-18 12:44 AM has it always been ascii art 21-Nov-18 12:44 AM YAH 21-Nov-18 12:44 AM @hedgeberg you're like papaya then? 21-Nov-18 12:44 AM im the ascii fish 21-Nov-18 12:44 AM i am LEARNING. 21-Nov-18 12:44 AM @GigaSquirrel should not matter. 21-Nov-18 12:44 AM Lot of theory @GigaSquirrel but it comes down to a lot of things 21-Nov-18 12:44 AM before i was an ascii fish i was an anime girl 21-Nov-18 12:44 AM Likely, defiance of social norms? 21-Nov-18 12:44 AM @GigaSquirrel most of us grew up on the internet 21-Nov-18 12:44 AM Yeah that too 21-Nov-18 12:45 AM Fair, that's how I got into it, too 21-Nov-18 12:45 AM yeah, bad parenting 21-Nov-18 12:45 AM XD 21-Nov-18 12:45 AM Ok, so I now feel totally out of place... 21-Nov-18 12:45 AM why? 21-Nov-18 12:45 AM Exposure theory. Basically, more people realize they're queer when they know a lot of queers 21-Nov-18 12:45 AM game consoles & computers instead of love! 21-Nov-18 12:46 AM So, actually it's more likely that this is the reality of all communities, but in those communities a lot of people just... Don't know 21-Nov-18 12:46 AM i would be queer if it gains access to real chicks 21-Nov-18 12:46 AM Uh? 21-Nov-18 12:46 AM What? 21-Nov-18 12:46 AM i mean, i've no idea about my real internal sexuality 21-Nov-18 12:46 AM Because I is not lgbt(but have no issues with those who are), didn't grow up with the Internet, but always seem to end up in such places. I am cool with that, but feel like nowhere is quite home. 21-Nov-18 12:46 AM if i start thinking about that, i drink beer 21-Nov-18 12:46 AM You're blue, don't worry. 21-Nov-18 12:47 AM @Nixie blue only on the outside!11 21-Nov-18 12:47 AM Ie, I think I don't know who I am! 21-Nov-18 12:47 AM What is happening right now... 21-Nov-18 12:47 AM coffein overdoze 21-Nov-18 12:47 AM too much coffee for me 21-Nov-18 12:47 AM don't think too much about it when it comes to sexuality, just do what feels right at the moment, that's always worked for me 21-Nov-18 12:47 AM To me it's easier, i just think people is people. blue, red, yellow, queer. Everyone is equal and free in my head perfect world. 21-Nov-18 12:47 AM /hugs @N00N / its okay. 21-Nov-18 12:48 AM in a perfect world i would be like jean-luc picard 21-Nov-18 12:48 AM in all seriousness, these are good questions to honestly ask yourself 21-Nov-18 12:48 AM badass ship 21-Nov-18 12:49 AM I'd do nameless things to you if you where piccard. 21-Nov-18 12:49 AM but, you know, in due time 21-Nov-18 12:49 AM mostly, blow up your spaceship from time to time. 21-Nov-18 12:49 AM yeah, they build new ones 21-Nov-18 12:49 AM performing experiments in engineering 21-Nov-18 12:49 AM quantum torpedos! 21-Nov-18 12:50 AM We have none, cap'n 21-Nov-18 12:50 AM we used them to stirr the coffee 21-Nov-18 12:50 AM aw 21-Nov-18 12:50 AM earl grey hot! 21-Nov-18 12:50 AM /gives explosive mug of plasma tea/ 21-Nov-18 12:50 AM English breakfast please 21-Nov-18 12:51 AM burned toast with saltbutter and bitter orange stuff? 21-Nov-18 12:51 AM I'm a replicator, not a bartender. 21-Nov-18 12:51 AM go ask quinan 21-Nov-18 12:51 AM Trying to cook some pancakes atm, but you ppl keep distracting me... 21-Nov-18 12:51 AM ?mute Zhang? 21-Nov-18 12:51 AM XD 21-Nov-18 12:52 AM so you can concentrate. 21-Nov-18 12:52 AM (can't see your symbol, zhang) 21-Nov-18 12:52 AM Yeah, that's fine. I have the other half pressure if I don't get it done. 21-Nov-18 12:54 AM Go make pancakes, go! 21-Nov-18 12:54 AM Ok anyway lemme post the pic of my partner I thought yall would enjoy 21-Nov-18 12:54 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20181120_202034-0423A.jpg 21-Nov-18 12:54 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20181120_202032-DAFFA.jpg 21-Nov-18 12:54 AM That's why Discord is available on mobile... 21-Nov-18 12:54 AM ?cat 21-Nov-18 12:54 AM Found one! 21-Nov-18 12:55 AM This is our cat, jelly Bean, sleeping on my partner's face 21-Nov-18 12:55 AM We could not move her 21-Nov-18 12:55 AM She insists on being on face 21-Nov-18 12:55 AM She did this last year too during the winter 21-Nov-18 12:55 AM Nice and warm? 21-Nov-18 12:56 AM A couple of weeks after getting her I woke up with her slouched across my neck like a scarf 21-Nov-18 12:56 AM Hedgeberd's cat is unimpressed 21-Nov-18 12:56 AM She's a weird cat 21-Nov-18 12:56 AM She's a really weird cat 21-Nov-18 12:56 AM Sounds good to me! Weird can be a positive. 21-Nov-18 12:57 AM A Schrodinger cat of weirdness? 21-Nov-18 12:57 AM What? I don't think that's how any of that works 21-Nov-18 01:00 AM i love weird cats 21-Nov-18 01:00 AM as a weird cat, 21-Nov-18 01:00 AM You are a 21-Nov-18 01:00 AM that. 21-Nov-18 01:00 AM :D 21-Nov-18 01:00 AM cats! 21-Nov-18 01:02 AM The bitter orange stuff is called marmelade 21-Nov-18 01:02 AM The cat looks very at home there :3 21-Nov-18 01:06 AM XD 21-Nov-18 01:07 AM Oh wow, there's like a thousand or more new messages in #general … 21-Nov-18 01:08 AM same thing every morning, one I go to sleep everyone else wakes up 21-Nov-18 01:10 AM My attempt at a solution was to just not sleep, but that didn't work out too well 21-Nov-18 01:11 AM just made coffee, want some? 21-Nov-18 01:13 AM oh hey neat to adequately treat HF burns on the hand you have to remove their fingernails. lovely. wonderful. that's why they kept saying it penetrated past fingernails 21-Nov-18 01:13 AM ... 21-Nov-18 01:13 AM why am i still reading about this horrible substance 21-Nov-18 01:13 AM i mean uh enjoy your coffee <:D 21-Nov-18 01:14 AM don't worry, my mom is a biologist, I've heard and seen worse while eating 21-Nov-18 01:15 AM ah, ok, cool, that's where local anesthetics come handy then? 21-Nov-18 01:15 AM (proper removal of your own finger nails) 21-Nov-18 01:18 AM No 21-Nov-18 01:18 AM You don't anesthetize that either 21-Nov-18 01:18 AM You need to be 100% experiencing it all until the substance is neutralized 21-Nov-18 01:19 AM yeah i kno :(( 21-Nov-18 01:19 AM Anyway I'm off, night all 21-Nov-18 01:19 AM but i want a purpose for local anesthetics 21-Nov-18 01:19 AM good night hedgeberg 21-Nov-18 01:20 AM In this procedure? 21-Nov-18 01:20 AM None 21-Nov-18 01:20 AM yeah, or more general 21-Nov-18 01:20 AM maybe pre-remove fingernails? 21-Nov-18 01:20 AM If you're performing home surgery, by all means 21-Nov-18 01:20 AM before handling HF remove your fingernails \o/ 21-Nov-18 01:20 AM Yup there you go 21-Nov-18 01:20 AM and that's where LA come handy 21-Nov-18 01:20 AM yay 21-Nov-18 01:22 AM good night, hedgehog :) 21-Nov-18 01:31 AM Ok real quick before sleep 21-Nov-18 01:31 AM Why is Reddit the way that it is 21-Nov-18 01:31 AM Why do people think someone saying they need 2 laptops on a trip deserves ridicule a la r/iamverysmart 21-Nov-18 01:31 AM I travel with 3 laptops 21-Nov-18 01:31 AM I'll probably have 4 next time, depending on the program I'm traveling for. 21-Nov-18 01:31 AM Why do people always assume everyone else is stupid just because they're doing something people don't understand 21-Nov-18 01:35 AM Sounds like a deep dive into the human psyche 21-Nov-18 01:35 AM And, who cares how many devices one travels with? Typically it is for what you need. 21-Nov-18 01:47 AM yeah, it's like "you don't need 3 guns" 21-Nov-18 01:58 AM Or 7 phones, or whatever. 21-Nov-18 02:02 AM Oh wow, it took me 50 mins just to catch up in general... 21-Nov-18 02:03 AM I didn't even try 21-Nov-18 02:03 AM anything of importance? 21-Nov-18 02:04 AM Plenty Craigslist, a discussion on the horrible dangers of HydroFluoric-acid, jokes about super-laser-hair-removal and discussion of rules against foul language 21-Nov-18 02:05 AM thanks 21-Nov-18 02:05 AM the discussion about language was in the admin section, too 21-Nov-18 02:05 AM Ah, didn't think of that 21-Nov-18 02:06 AM and HF still scares me, even more after what I've read today 21-Nov-18 02:07 AM Also discussions of whether its okay to use a circular saw outside at midnight, and someone being weird about people, who don't drink coffee, but I think that was you? 21-Nov-18 02:07 AM yep 21-Nov-18 02:10 AM I don't, because I'm not a fan of casually/out-of-habit getting dependant on stimulants I don't need. But my definition of "need" might change when I get a job or sth. 21-Nov-18 02:12 AM the choice was to start with caffeine or sleep through school 21-Nov-18 02:12 AM and once you're hooked it escalates 21-Nov-18 02:12 AM I chose sleep, you fool 21-Nov-18 02:13 AM Yeah, I pretty much only drank coffee to not be late for my A-levels 21-Nov-18 02:13 AM but in that case I'd have to do more at home, where I like to spend as much time as possible with my hobbies 21-Nov-18 06:26 AM I'm the no coffee drinker who haunts Gigabeckerel. 21-Nov-18 06:29 AM screams in horror 21-Nov-18 06:29 AM BOOOOOO 21-Nov-18 06:30 AM runs away 21-Nov-18 06:32 AM hello 21-Nov-18 06:36 AM Hello @N00N 21-Nov-18 06:41 AM :3 21-Nov-18 06:42 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20181121_154201-4BB4C.jpg 21-Nov-18 06:42 AM first steps in repairing the cryo! 21-Nov-18 06:49 AM AH!!!!!! 21-Nov-18 06:49 AM how's the nose/brain going with the heated resin? 21-Nov-18 06:49 AM already see floating capacitors? 21-Nov-18 06:50 AM nice 21-Nov-18 06:50 AM smell is not as strong as i thought it was going to be 21-Nov-18 06:50 AM brain is as damaged as usual, for now 21-Nov-18 07:07 AM tool got stuck, gotta start again... >.< 21-Nov-18 07:07 AM looks like the extra damage is starting 21-Nov-18 07:21 AM beer is the antidote 21-Nov-18 07:23 AM You are getting too excited. 21-Nov-18 07:23 AM You should look into aluminium cutting inserts 21-Nov-18 07:23 AM They are super sharp, should help a lot cutting phenolic. 21-Nov-18 07:25 AM that's what I'm using, but the tool that grabbed was a (dull) HSS cutoff tool 21-Nov-18 07:25 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/JPEG_20181121_162545-F0F25.jpg 21-Nov-18 07:26 AM i got DCMT, looks like the bottom one 21-Nov-18 07:27 AM My cuttof is MGGN, cuts lovely 21-Nov-18 07:27 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/JPEG_20181121_162807-707A8.jpg 21-Nov-18 07:29 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20181121_162933-7A34E.jpg 21-Nov-18 07:30 AM Of...no 21-Nov-18 07:30 AM Can you braze carbide? 21-Nov-18 07:31 AM never tried it 21-Nov-18 07:32 AM If you can, let me know and I'll send you a mggn 21-Nov-18 07:32 AM Insert. 21-Nov-18 07:32 AM Also, dcmt is bad for this kind of work 21-Nov-18 07:32 AM It puts enormous pressure in the cut. 21-Nov-18 07:32 AM What holders do you have? 21-Nov-18 07:34 AM 8x8 mm ground by a local tools suppliert 21-Nov-18 07:34 AM one sec 21-Nov-18 07:35 AM (I mean the other holders, lets see if i can insert you a TGCT) 21-Nov-18 07:36 AM https://www.hoffmann-group.com/GB/en/houk/Modular-machining/Indexable-turning-GARANT/Screw-on-toolholder-right-hand/p/260308-08@2F07# 21-Nov-18 07:36 AM ah 21-Nov-18 07:36 AM none 21-Nov-18 07:38 AM With that toolholder i think i can give you one of these: 21-Nov-18 07:38 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/JPEG_20181121_163854-ED704.jpg 21-Nov-18 07:39 AM I don't know much about inserts, whats the difference between that and mine? 21-Nov-18 07:46 AM You say you have ine like the goldish one from this photo 21-Nov-18 07:46 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/JPEG_20181121_164651-FA591.jpg 21-Nov-18 07:46 AM See how the silver insert on the left has a much more pronounced angle? 21-Nov-18 07:46 AM It reduces pressure in the cutting area 21-Nov-18 07:46 AM Btw, as far as I see, the inserts I have work for you. DM me your adress 21-Nov-18 07:48 AM wow, thanks! 21-Nov-18 07:48 AM will do so once I'm done here 21-Nov-18 08:05 AM At your own pace, dont worry. 21-Nov-18 12:55 PM https://www.youtube.com/watch?v=eUUupR-ongs Awesome! 21-Nov-18 02:23 PM He did plug up a 5 minute talk in hackaday supercon...made me mad, it totally smelled like paid spam. 21-Nov-18 02:23 PM (after a 40 minute talk of something else, I mean) 21-Nov-18 02:26 PM There is a fine line between "You have to buy this product!" and "I want to inform you about this, because I think it is awesome" 21-Nov-18 02:26 PM often depends on the exact wording 21-Nov-18 02:35 PM I am extremely picky, so it might be me. 21-Nov-18 05:42 PM I mean, how different is it than any other talk where someone shows off something built with Adafruit® Neopixels™ 21-Nov-18 05:47 PM oh i think @rqou was working with that stuff 21-Nov-18 05:47 PM or something very similar 21-Nov-18 05:50 PM I was thinking of using it when I was working on a glowing conbadge but I ended up finding a better solution 21-Nov-18 05:50 PM (you can get cheap flexable conbadge sized EL panels and cut them up like a vinyl sticker) 21-Nov-18 05:50 PM But I'm still curious about applying paint based stuff to skin 21-Nov-18 05:50 PM And then making zappy glow people 21-Nov-18 05:50 PM Or like, musically reactive zappy glow people 21-Nov-18 10:23 PM There'll certainly be zap 21-Nov-18 10:26 PM @goopypanther the fact that the previously 40 minutes of his talk he had been talking of a completely different matter. 22-Nov-18 04:29 AM @vc heya 22-Nov-18 04:29 AM I think discord doesn't like intercontinental calls over spotty WiFi… 22-Nov-18 04:55 AM oh wow 22-Nov-18 04:55 AM @qualia I'm hearing you double and delayed. 22-Nov-18 04:55 AM the paint 22-Nov-18 05:04 AM My voice is literally broken rn 22-Nov-18 05:04 AM I got the worst cold I have had in a few years 22-Nov-18 05:05 AM Leona go to #voiceposting 22-Nov-18 05:57 AM ohhh oops 22-Nov-18 05:57 AM i had this channel open on another computer and didn't see the notifications come in 22-Nov-18 05:57 AM sry! 22-Nov-18 05:58 AM Ah, could have guessed that 22-Nov-18 11:28 AM ?cat 22-Nov-18 11:28 AM Found one! 22-Nov-18 11:28 AM :3 22-Nov-18 02:01 PM ?turbopump 22-Nov-18 02:01 PM Meh, this bot is broken. 22-Nov-18 02:01 PM 22-Nov-18 02:12 PM aaand I'm back \o/ 22-Nov-18 03:42 PM ...and gone again, good night everyone 22-Nov-18 04:59 PM O/ 22-Nov-18 04:59 PM How's everyone doing? 22-Nov-18 04:59 PM Happy Thanksgiving (not taking into account all the everything associated with the history of the Holiday) to US peeps, check out my pie 22-Nov-18 04:59 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20181122_195811-21258.jpg 22-Nov-18 05:07 PM yummy, happy holiday to you too! 22-Nov-18 08:30 PM Hey, it is stupid o'clock in the morning again. 22-Nov-18 08:30 PM Time to catch up on Discord... 22-Nov-18 10:26 PM Morning! 22-Nov-18 10:26 PM /steals a bit of pie/ 23-Nov-18 12:16 AM Moin! 23-Nov-18 12:16 AM that pie looks great! 23-Nov-18 12:31 AM Moin! 23-Nov-18 12:31 AM (someday I'll change it for "Boing" and you won't nottice) 23-Nov-18 12:39 AM mhhh, coffee :3 23-Nov-18 12:39 AM BOOOOO 23-Nov-18 12:40 AM brings his cup closer Nooo, he didn't mean it! 23-Nov-18 12:41 AM 23-Nov-18 12:56 AM Personally I prefer to start with a delightful English breakfast tea 23-Nov-18 12:56 AM And my toast done on one side. 23-Nov-18 12:57 AM it's hard to get good tea here 23-Nov-18 01:16 AM I much prefer infusions. They combine the qualities of soda with the qualities of tea 23-Nov-18 01:18 AM infusions? Like... caffeine IV? 23-Nov-18 01:20 AM Both is Tee in German 23-Nov-18 01:20 AM But I mean the teas without tea leaves 23-Nov-18 01:22 AM ah, so the stuff being sold as "Früchtetee" here? 23-Nov-18 01:22 AM For example 23-Nov-18 01:22 AM today I learned something new! 23-Nov-18 01:22 AM but there's no caffeine in that 23-Nov-18 01:24 AM The British make a clear distinction and call Kräutettees, Früchtetees etc infusions. Idk about American English 23-Nov-18 01:24 AM I know. I drink it for the taste 23-Nov-18 01:25 AM I suppose americans thow both into the harbor, regardless of it being tea or a infusion 23-Nov-18 03:27 AM It's all tea here. The tea-free tea is called "herb tea", if you need to distinguish. In Glasgow last year, and noticed the relatively low stock of infusions compared to US. Here tea is more often a semi spiritual relaxation ritual rather than a pragmatic caffeine delivery device. More popular with women than men. FWIW, a few years back "the Tea Party" was self chosen name for a conservative political movement. 23-Nov-18 03:32 AM I like that - "Semi Spiritual Relaxation"... 23-Nov-18 03:32 AM If only. 23-Nov-18 03:40 AM hi 23-Nov-18 03:40 AM moin 23-Nov-18 03:40 AM do you know "Fingers Welt"? 23-Nov-18 03:40 AM the website / forum 23-Nov-18 03:44 AM yes but i'm not a forum user 23-Nov-18 03:45 AM in that case I don't think we've ever met, almost all of the hobbyists I know are on the forum ^^ 23-Nov-18 08:27 AM I wish we still had any alive "hobbyist science" style boards here 23-Nov-18 08:27 AM Most are dead due to the low amount of hobbyists and the large problem of getting sometimes raided if you do chemistry of anykind 23-Nov-18 08:34 AM Wut? I mean, what would be "Hobbyist science board" if it's not this? 23-Nov-18 08:35 AM I think he meant something more local 23-Nov-18 08:36 AM Local language 23-Nov-18 08:36 AM And yeah something like this 23-Nov-18 08:36 AM the secondary problem is curious folks talking either directly about explosives or drugs 23-Nov-18 08:37 AM "Explosion welding" 23-Nov-18 08:37 AM And that drives away folks who actually do stuff like chemistry for a living and in general brings in a shady atmosphere 23-Nov-18 08:37 AM explosion welding is a legit technique 23-Nov-18 08:38 AM (I know) 23-Nov-18 08:38 AM I'd rahter not discuss electroplating on a forum where there is a thread next to it about "electro reduction of nitrostyrenes to isopropylamines" 23-Nov-18 08:38 AM Which is why it is nice that this place has a nice and narrow focus 23-Nov-18 08:38 AM sciencemadness has so much stealth and non-stealth threads about various things that affect brainchemistry. 23-Nov-18 08:40 AM Hey just for future reference let's keep any references to that topic to a minimal... 23-Nov-18 08:41 AM Agreed. 23-Nov-18 08:41 AM sry for any disruption. 23-Nov-18 08:42 AM Yeah no problem. As you said though... 23-Nov-18 08:43 AM (It took me a while to pick up that the problem topic was not explosion welding, but brain chemistry alteration) XD 23-Nov-18 08:43 AM Please clarify @AdamMcCombs. 23-Nov-18 08:43 AM Ah 23-Nov-18 08:43 AM Yeah for sure @Leona. I think Nixie nailed it though 23-Nov-18 08:43 AM It basically comes down to lets keep discussion of things that are prohibited under the controlled substances act in the united states to a minimum. 23-Nov-18 08:46 AM I understand, thanks 23-Nov-18 08:46 AM What it really comes down to is I like this server existing 23-Nov-18 08:47 AM not only in the united states 23-Nov-18 08:47 AM Fair. The CSA is broad though and should cover anything that's also illegal in other countries 23-Nov-18 08:48 AM Besides who needs other things than HVAC, large amounts of electricity and/or explosives in their life? 23-Nov-18 08:48 AM (for a strange reason, I like slightly messing up with you, don't take that personally, @AdamMcCombs , ^^U ) 23-Nov-18 08:49 AM Thats also fair 23-Nov-18 05:18 PM meow 23-Nov-18 05:19 PM *hello fellow person, how's your day going? 23-Nov-18 05:28 PM I'm sorry. That wasn't appropriate. 23-Nov-18 05:46 PM purrs ~3~ 23-Nov-18 05:46 PM speak fur yrself 23-Nov-18 05:46 PM naw, stuff's good 23-Nov-18 05:46 PM phew 23-Nov-18 05:46 PM sweating bullets over here 23-Nov-18 05:48 PM i'm hangin out with @rqou 23-Nov-18 05:48 PM pumpin' down my zeolites 23-Nov-18 05:48 PM as one does 23-Nov-18 05:52 PM Oh? planning something fun with filtering radioactive waste? 23-Nov-18 07:01 PM not this lifetime, hopefully 23-Nov-18 07:01 PM just leak hunting 23-Nov-18 07:01 PM wiring up, like, little switchmode regulators for cooling fans to make sure my turbopump actually stays cool while running 23-Nov-18 07:01 PM casual nonsense ~3~ 23-Nov-18 07:04 PM Is there a reason you can't do linear? 23-Nov-18 07:06 PM well it's just a 24v-to-12v thing to drive a PC fan 23-Nov-18 07:06 PM and i have a bunch of lm2985s or something just sitting around 23-Nov-18 07:06 PM Oh ok 23-Nov-18 07:06 PM cha 23-Nov-18 07:07 PM Still I don't like smps close to instrumentation... 23-Nov-18 07:08 PM 'cos of equipment-destroying failure modes, or noise, or.. 23-Nov-18 07:08 PM Both 23-Nov-18 07:08 PM i guess there's a lot of potential reasons 23-Nov-18 07:08 PM Linear with a big heat sync just... Works. 23-Nov-18 07:08 PM but yeah like i have very little in the way of especially exotic instrumentation 23-Nov-18 07:08 PM sure, sure 23-Nov-18 07:09 PM And fails open 23-Nov-18 07:09 PM Smps can fail open... 23-Nov-18 08:21 PM who decided it was reasonable to make the gnu chess engine so hard 23-Nov-18 09:40 PM truly off topic Gmorning! 23-Nov-18 09:41 PM i return to the internet 23-Nov-18 09:41 PM gosh thanksgiving is not a good time 23-Nov-18 09:43 PM Welcome, wanderer. Rest peacefully explosion weld in the background Ahem...do try to rest. 23-Nov-18 10:53 PM @iximeow Im sorry, feel that 23-Nov-18 10:53 PM family is difficult? 23-Nov-18 10:54 PM i heard several slurs casually tossed around that i'd forgotten even existed 23-Nov-18 10:54 PM woof 23-Nov-18 10:54 PM been there 23-Nov-18 10:54 PM im really sorry 23-Nov-18 10:54 PM at least youre free now? 23-Nov-18 10:55 PM exaaaaactly 23-Nov-18 10:55 PM and back to looking at what i've concluded is an implementation bug, not an algo bug 23-Nov-18 10:55 PM well thats... good? depending on context? 23-Nov-18 10:55 PM oh, heres a fun question: ever built arch for an arm target? I'm considering doing so for the CHIP SBC cuz I bought one off ebay when I realized the company went under. 23-Nov-18 10:57 PM ooo nope 23-Nov-18 10:57 PM that sounds fun 23-Nov-18 10:57 PM yeah, the chip wasnt like, a great product or anything, but it is small and open source and less complex than, like, a beaglebone, so for some simple projects it might be good for stuff? 23-Nov-18 10:57 PM plus the pocket chip, which is a keyboard + touch lcd screen + battery that plugs into it is kinda fun 23-Nov-18 10:58 PM i need to figure out something not a full laptop for recording and transmitting images from my telescope 23-Nov-18 10:58 PM drawing ~40W to store an amortized 1mb/s is Not Ok 23-Nov-18 10:58 PM oof, yeah 23-Nov-18 10:58 PM would teensy get the job done? 23-Nov-18 10:58 PM what is your telescope architecture actually? radio? 23-Nov-18 10:59 PM ooh i wonder if one of those might be sufficient 23-Nov-18 10:59 PM optical 23-Nov-18 10:59 PM interface? 23-Nov-18 11:00 PM 9.25" sct with a ~30some megapixel ccd on the end 23-Nov-18 11:00 PM the camera is usb 3, telescope interfaces are... practically nonexistant 23-Nov-18 11:00 PM there exists a serial port, but it's some custom pinout and i haven't bothered to figure out a cable yet 23-Nov-18 11:00 PM and even then the control software exists as a discrete handset of an emulator only on windows as a vb6 app with some dll that i've only partially picked apart 23-Nov-18 11:00 PM hmmm, idk how many small sbc's have usb3 23-Nov-18 11:00 PM you want to trasnmit over wifi? or just save to an HDD? 23-Nov-18 11:01 PM yeah that's the annoying thing, it's functionally a burst of data every ~30-100sec 23-Nov-18 11:01 PM saving locally and even sampling parts over wifi would be great 23-Nov-18 11:02 PM tbh I gotta say the best thing would prolly be, and this is going to sound like a joke 23-Nov-18 11:02 PM an intel galileo board 23-Nov-18 11:02 PM aren't those super dead? 23-Nov-18 11:02 PM yup 23-Nov-18 11:02 PM wonder if you can get one on ebay 23-Nov-18 11:02 PM trying to see if it has usb3 or not 23-Nov-18 11:03 PM they were kinda neat tbh 23-Nov-18 11:03 PM nvmd im wrong it doesnt 23-Nov-18 11:03 PM i wish they stuck around 23-Nov-18 11:03 PM YEAH TBH 23-Nov-18 11:03 PM I love that they have an M.2 port and an arduino shield header??? 23-Nov-18 11:04 PM Galileo Galileo 23-Nov-18 11:04 PM I have one 23-Nov-18 11:04 PM Also a pre-broken-out jtag header 23-Nov-18 11:04 PM like, in a lot of ways they really were a great SBC 23-Nov-18 11:04 PM yeah the one i have is def not usb3, dunno why i thought it was? 23-Nov-18 11:07 PM https://www.amazon.com/Globalscale-Technologies-Inc-SBUD102-ESPRESSObin/dp/B06Y3V2FBK hummm 23-Nov-18 11:07 PM https://www.mouser.com/search/refine.aspx?Ntk=P_MarCom&Ntt=130721827 oof 215 bucks 23-Nov-18 11:07 PM oh you could use ethernet couldnt you... 23-Nov-18 11:07 PM wait no that doenst get you usb3 23-Nov-18 11:07 PM oh but the espresso does have usb3 23-Nov-18 11:07 PM im dumb 23-Nov-18 11:07 PM yeah that could do it 23-Nov-18 11:08 PM no but there's a usb3 port on there 23-Nov-18 11:08 PM yeah 23-Nov-18 11:08 PM you could bond an ssd on there too 23-Nov-18 11:08 PM I kinda wanna build a broadband radio telescope one of these days that hooks up to my limesdr 23-Nov-18 11:09 PM YESSSS 23-Nov-18 11:09 PM i'd love to do radio astronomy 23-Nov-18 11:09 PM even just RX only would be great 23-Nov-18 11:09 PM shame I can't do TX but you know 23-Nov-18 11:10 PM amid Family Things i took ~2.5 hours of images of unanus :3 23-Nov-18 11:10 PM there's very clear motion of moons and i'm very excited to deal with making a video or smth tomorrow 23-Nov-18 11:14 PM Post it once done ^^ 23-Nov-18 11:15 PM Sct stands for Schmidt-Cassegrain-Telescope? 23-Nov-18 11:29 PM yep that 23-Nov-18 11:37 PM Anyone got a good map of light contamination (I'm looking for spain specifically) 23-Nov-18 11:38 PM https://darksitefinder.com/maps/world.html#4/39.00/-98.00 this has yet to lead me astray 23-Nov-18 11:38 PM well, https://darksitefinder.com/maps/world.html#6/39.317/-3.582 might be more your jam 23-Nov-18 11:43 PM This year we tried to go see the perseids, but was a bit of a failure. 23-Nov-18 11:43 PM I assume the grey in the middle of the dark blue is unmeasured area, right? 23-Nov-18 11:43 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/unknown-8F5EF.png 23-Nov-18 11:43 PM We went to a place just below the gray area, but there where clouds reflecting light from the nearby towns. (and it's one of the darkest spots in spain :/ 23-Nov-18 11:43 PM btw, thanks ^^ 23-Nov-18 11:55 PM gray should be darkest areas 23-Nov-18 11:58 PM Hmm...will try next year. 24-Nov-18 12:05 AM i usually check that for good dark spots, then when i get closer to making plans follow up with meteoblue's seeing predictions (not sure how but their numbers are always about accurate ime), and then weather forecast through the day 24-Nov-18 12:05 AM but it's an hour and a half or two to somewhere decently dark, so going out is a commitment 24-Nov-18 12:10 AM it would be real nice to have a little plot of land out in the middle of nowhere and build a little tiny observatory 24-Nov-18 12:10 AM and then run fiber to it so that you could control it remotely 24-Nov-18 12:11 AM Yeah 24-Nov-18 12:17 AM You could have satellite, no need to run fiber. XDDD We are planing on getting a small house about just half an hour away from that dark spot. ^^ 24-Nov-18 01:42 AM my family has a place out in vermont 24-Nov-18 01:42 AM and you can see the stripe of the milky way with the naked eye there 24-Nov-18 01:42 AM bet it would be awesome to use a telescope out there.... 24-Nov-18 01:42 AM one day 24-Nov-18 01:48 AM True 24-Nov-18 08:51 AM those phenom SEM are the latest sh1t, right? 24-Nov-18 09:30 AM @Nixie no? 24-Nov-18 11:58 AM Since adam told that having a sem is so much work, my hopes of getting one have dwindled much. 24-Nov-18 12:00 PM Yeah, I mean those “new” bench top thingies 24-Nov-18 12:00 PM I have only old ones - and now I’m interested in biological specimens & their preparation, so I purchased this book: 24-Nov-18 12:00 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/image0-A082E.jpg 24-Nov-18 12:00 PM 10 euro used 24-Nov-18 12:21 PM The focus is on bio stuff 24-Nov-18 12:21 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/image0-99250.jpg 24-Nov-18 06:15 PM That's not a isi Supper IIIA... 24-Nov-18 06:15 PM Put also I think that's one of the books I learned from for tem replicant stuff 25-Nov-18 04:01 AM yes, i've four and a half different SEM 25-Nov-18 04:01 AM first one was the super IIIA from the dead chemistry teacher and after that ... within app 12 months the other ones followed 25-Nov-18 05:06 AM envy 25-Nov-18 05:31 AM just found it I have an embroidered oscilloscope patch. 25-Nov-18 05:31 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/JPEG_20181125_143145-49DA0.jpg 25-Nov-18 05:36 AM Adafruit? 25-Nov-18 06:14 AM :D 25-Nov-18 06:21 AM Yep. Could not resist 25-Nov-18 11:58 AM Slow sunday... https://giphy.com/gifs/headlikeanorange-desert-bbc-africa-sahara-1wwv6MnSsQwP6 25-Nov-18 12:04 PM yep... 25-Nov-18 12:05 PM Well I went to fix that objective stability problem on my sem, and.... Now I can't recreate it. 25-Nov-18 12:06 PM so it's fixed? 25-Nov-18 12:06 PM No, it's worse than broken. It's intermittent. 25-Nov-18 12:07 PM ew, worst kind of error 25-Nov-18 12:15 PM Too much blinker fluid. 25-Nov-18 02:42 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20181125_234157-FAF63.jpg 25-Nov-18 02:42 PM So, ypu make a professional photo of your product...and allow a stripped screw in it...yeah. 25-Nov-18 02:42 PM (third down from rightmost corner) 25-Nov-18 02:44 PM ...pfff 25-Nov-18 02:44 PM i just saw that too and was like 'OOH that looks snazzy' 25-Nov-18 02:44 PM good eye :P 25-Nov-18 02:49 PM yeah, nixie is just a perfectionist 25-Nov-18 02:52 PM Or observant... 25-Nov-18 02:52 PM And not to be dualistic, observant and a perfectionist. 25-Nov-18 02:53 PM I'd say something-retentive, really. 25-Nov-18 02:56 PM Fair 25-Nov-18 08:11 PM so how does one become a member of the dead gauges society 25-Nov-18 08:12 PM You buy this one cheap vacuum guage off Twitter that's pretty much guaranteed to come with a dead capacitor. 25-Nov-18 08:12 PM Well actually you buy it from eBay 25-Nov-18 08:12 PM The joke came from Twitter 25-Nov-18 11:59 PM http://www.maxwell.com/images/documents/hsn1000_rev3.pdf 25-Nov-18 11:59 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/Screenshot_20181125-235840-33991.jpg 26-Nov-18 11:42 AM no snow theme 26-Nov-18 11:42 AM XD 26-Nov-18 11:42 AM @Pan Da don't cause an accident 26-Nov-18 11:42 AM Mars InSight telemetry nasa video 26-Nov-18 11:42 AM https://www.youtube.com/watch?v=gH4crD9pW4k 26-Nov-18 11:43 AM is this the probe with the drill for temperature measurement? 26-Nov-18 11:43 AM yeah 26-Nov-18 11:43 AM altough more than a drill, it's a pump hammer. 26-Nov-18 11:43 AM No snow here yet, but it was pretty warm outside today 26-Nov-18 11:44 AM OMG. nasa reported celsius instead of farenheit. XDDD 26-Nov-18 11:44 AM another win for science! 26-Nov-18 11:45 AM Until some imperialist realizes (this is a joke, btw) 26-Nov-18 11:46 AM *someone from the colonies 26-Nov-18 11:47 AM BAHAHAH 26-Nov-18 11:47 AM @GigaSquirrel I AM the accident... no, wait, that sounds wrong. 26-Nov-18 11:47 AM ROFL 26-Nov-18 11:47 AM nope, pretty accurate 26-Nov-18 11:47 AM no way to recover from that now. 26-Nov-18 11:51 AM to recover from what? 26-Nov-18 11:53 AM the wrong sounding 26-Nov-18 11:53 AM (3 minutes for touchdown) 26-Nov-18 11:53 AM yeeeee touchdown! 26-Nov-18 11:54 AM ah, no worries, this is our standard humour. we try to keep it civil in public, but sometimes we just can't help it. 26-Nov-18 11:54 AM Ah, don't worry. 26-Nov-18 11:56 AM there are reports of people trying to wash their ears and brain with laundry detergent after a prolonged car trip with us... 26-Nov-18 11:56 AM BAHAHAHAHAAHAHAH 26-Nov-18 11:56 AM There are confirmed reports of people eating dishwasher detergent...so... 26-Nov-18 11:56 AM If I ever go to visit, I'll suffer it myself, I guess. 26-Nov-18 11:56 AM I do have noise cancelling earphones though. 26-Nov-18 11:57 AM guess we'll have to stick to visual humor 26-Nov-18 11:57 AM XDDD 26-Nov-18 11:57 AM OMFG...someone in the control room is calles Bruce Banner 26-Nov-18 11:57 AM how many hulk jokes will they have made? 26-Nov-18 11:58 AM I fixed my 3d Printer, THIS TIME FOR REAL! 26-Nov-18 11:58 AM better not make him angry 26-Nov-18 11:58 AM or hungry 26-Nov-18 11:58 AM yeah, but the people we take with us in most cases are not stupid. just desperately trying to forget our bad jokes and incredibly dry puns 26-Nov-18 11:59 AM yay! 26-Nov-18 11:59 AM dry puns? 26-Nov-18 11:59 AM ...i type too slowly today :-/ 26-Nov-18 11:59 AM dont'worrysomeonestolemyspacebar 26-Nov-18 11:59 AM Turns out the broken part was the spol of filament 26-Nov-18 11:59 AM @Leona Are you sure? Everytime I said that it worked for like 2 months max 26-Nov-18 11:59 AM ROFL 26-Nov-18 11:59 AM 2 months is not that bad 26-Nov-18 11:59 AM "German humour. it's no laughing matter." 26-Nov-18 11:59 AM wich printer do you have @Leona ? 26-Nov-18 12:00 PM Don't worry, I'll break it again. 26-Nov-18 12:00 PM @Leona - I can recommend my method when it comes to 3d printing - don't own a printer, own a printer-owner. 26-Nov-18 12:00 PM :3 26-Nov-18 12:00 PM It's an Anet A8, which seems to be a clone of the Wanhao i3 and is similar to some of the Prusa models 26-Nov-18 12:00 PM @Pan Da 26-Nov-18 12:01 PM Don't mix BDSM and industrial machinery pls. 26-Nov-18 12:01 PM Industrial BDSM...that sounds trashy 26-Nov-18 12:01 PM XDDD 26-Nov-18 12:01 PM sounds like the kind of music I'd listen to 26-Nov-18 12:02 PM I remember an old boss of mine listenint to what he called music, and I tell you from my heart, it sounded like a pick and place machine. 26-Nov-18 12:02 PM can't get much more industrial than that. 26-Nov-18 12:03 PM DEath Industrial <3 26-Nov-18 12:05 PM a friend likes that kind of "music", too - he once told me a story of his girlfriend wanting to fix the boiler in the bathroom until he told her he just listened to music while taking a shower 26-Nov-18 12:05 PM XDDDD 26-Nov-18 12:05 PM is writing an article in is linkedin, excuse his late responses 26-Nov-18 12:05 PM I respect the music, I listen to other things, though. 26-Nov-18 12:33 PM article has been written 26-Nov-18 12:34 PM i read that in a dark computergame-storyteller-like voice 26-Nov-18 12:34 PM Stanley walked through the right door 26-Nov-18 12:35 PM exactly that voice 26-Nov-18 12:36 PM Hah. I recall once listening to some industrial and wondering if it was a some remix with new beats. Turns out somebody was using a power drill in the building. Good beat tho. 26-Nov-18 12:40 PM i can't do that, Dave 26-Nov-18 12:40 PM @rfs oh, I know that feeling... there was this corrupted mp3 on my drive... thought it was some very nice industrial/hardstyle-mashup. turns out it was Pink Floyd with some glitches and a loop because of lost bits on the drive... 26-Nov-18 12:41 PM Hah 26-Nov-18 12:44 PM around that time you'll start reading video titles like "DRO Install - S02E39" as song names 26-Nov-18 12:44 PM Heh 26-Nov-18 12:44 PM "Pneumatic Detach" "Iminent Starvation" and so-on 26-Nov-18 12:44 PM "Detroit Diesel" too 26-Nov-18 12:45 PM youtube just recommended me "999999999 - X0004000X [NTNLTD001X]", sooo... 26-Nov-18 12:45 PM Sounds like like a Access to Arasaka side project 26-Nov-18 12:46 PM xD 26-Nov-18 12:46 PM :Port is still some good thinking music 26-Nov-18 12:46 PM oh well... 26-Nov-18 12:47 PM @Nixie , what music do you prefer? 26-Nov-18 12:48 PM sort of picks of everything, a song from rammstein here, a song of enya there, I kinda don't have a particular type of music I can whole heartedly say I like. 26-Nov-18 12:48 PM so I can't add much to the conversation, sorry ^^U 26-Nov-18 12:56 PM Tried Eisbrecher? Quite similar to Rammstein. 26-Nov-18 12:56 PM Never heard of them. ^^U 26-Nov-18 12:56 PM (will check them out) 26-Nov-18 12:59 PM Youtube has tons 26-Nov-18 12:59 PM Speaking of off topic stuff. Looks like I get to fly to china to apply torrseal 26-Nov-18 12:59 PM because folks who actually own their own helium leak detector are not comfortable doing it, because the potential leak is in a really annoying place. 26-Nov-18 01:02 PM sounds like so much fun... not 26-Nov-18 01:04 PM OMG, take photos or something. 26-Nov-18 01:11 PM Of which? 26-Nov-18 01:11 PM the leak detectors, it's not every day you see one torn down 26-Nov-18 01:12 PM not repairing the leak detecotr, but using it 26-Nov-18 01:12 PM assuming you have to tear it down to apply the sealent 26-Nov-18 01:12 PM using it to test the other device that has a leak, somewhere 26-Nov-18 01:13 PM ah, ok, I missunderstood that 26-Nov-18 01:13 PM used the leak detector as a metric of the organisation, because we rent one when we need one. 26-Nov-18 01:14 PM i'm still waiting for one to show up at my local scrapyard... 26-Nov-18 01:14 PM same 26-Nov-18 01:15 PM that, or a helium compressor 26-Nov-18 01:15 PM in times past a guy I know bought 4x broken mass spec online 26-Nov-18 01:15 PM and repaired two and sold them, lefthimself one 26-Nov-18 01:15 PM and then later decided that chemistry was too shady of a hobby 26-Nov-18 01:15 PM I wonder if he still has it in storage 26-Nov-18 06:30 PM I plan to disassemble my RGA and take lotsa photos, as one does 26-Nov-18 06:30 PM not exactly a full-on mass spec but close 26-Nov-18 09:08 PM @qualia you know not to touch the quadruple whatever you do? 26-Nov-18 09:12 PM because delicate geometry or because deadly voltage or 26-Nov-18 09:13 PM Geometry 26-Nov-18 09:13 PM i do not intend to disassemble that part 26-Nov-18 09:13 PM yeah 26-Nov-18 09:13 PM Apparently there's supper special jigs and stuff used to put those together 26-Nov-18 09:18 PM i believe it. it looks incredibly precisely put together, and understandably so 26-Nov-18 09:18 PM i kinda want to study the design theory behind them a bit 26-Nov-18 09:19 PM Yeah that would be interesting 26-Nov-18 09:19 PM I will say from using them they are a lot more useful than just a simple leak checker 26-Nov-18 09:21 PM i actually have a uh mysterious rackmount box from LBNL that claims to be a dual quadrupole power supply en route, and i plan to tear that down and examine its innards to see if i can make heads or tails of it 26-Nov-18 09:21 PM mostly for novelty's sake but also bc it seemed like a good deal for at least a bunch of exotic parts 26-Nov-18 09:22 PM Yeah especially if it's a larger quadrupole 26-Nov-18 09:22 PM maybe if i can divine the operational parameters of it out i could try to rebuild whatever it was once attached to 26-Nov-18 09:23 PM RF one or more like beam steering stuff? 26-Nov-18 09:24 PM possibly the lattet but i have no idea 26-Nov-18 09:25 PM That could also be fun 26-Nov-18 09:25 PM I wonder why syncatron light sources use undulators instead of RF quadruples? 26-Nov-18 09:54 PM Elon musk out here trying to return us all to the god damn gilded age 26-Nov-18 09:54 PM I hope no one minds that I am not musk friendly (but I am 420 friendly) 26-Nov-18 09:54 PM That's not even a funny joke I need to shut up 26-Nov-18 09:58 PM hedgeberg go to bed 26-Nov-18 09:58 PM my guess tho would be probably because i have heard it is more cost/power to deflect particles electrically than magnetically 26-Nov-18 09:58 PM there may also be some maxwellian reasoning behind that 26-Nov-18 09:58 PM permanent magnet undulators are totally a thing 26-Nov-18 10:19 PM i want to say that it's probably due to simplicity 26-Nov-18 10:19 PM RF quadrupoles for light generation mean you also now need to phase sync another set of RF amps 26-Nov-18 10:19 PM plus yeah nothing beats a big ol permanent magnet 26-Nov-18 10:29 PM Hi 26-Nov-18 11:03 PM Morning @N00N 26-Nov-18 11:03 PM What is 420 friendly? Also, Elon Musk is..meh. 26-Nov-18 11:03 PM (and what is the reference to the guilded age?,not hat I would mind, as a hardware fabricator) 26-Nov-18 11:41 PM 420 is slang for consuming cannabis 26-Nov-18 11:41 PM (Tesla stocks recently dipped quite noticeably, when musk consumed in a podcast or something.) 26-Nov-18 11:57 PM Ah... 27-Nov-18 02:01 AM yesss 27-Nov-18 02:01 AM new fet pair and my electrometer works again! 27-Nov-18 02:01 AM well, it dosen't display OL anymore 27-Nov-18 02:01 AM now I gotta find a way to test it without having a triax connector 27-Nov-18 02:18 AM How the hell do you even read the thing 27-Nov-18 02:41 AM XDDDD 27-Nov-18 02:41 AM I didn't understood a word of what you said apart from "works" and "fet pair" 27-Nov-18 02:42 AM A electrometer is like a DMM, but with almost unuseable input ranges 27-Nov-18 02:42 AM lowest ohms range is 10^5, highest ampere range is .1A 27-Nov-18 02:42 AM and triax is like coax but with a second screen which is held as close as possible to the input voltage, to minimize leakage current 27-Nov-18 02:42 AM that way they achieve something like 10^14 ohm input impedance 27-Nov-18 02:58 AM OMG 27-Nov-18 03:00 AM yep 27-Nov-18 03:01 AM and what is it that doesn't display? (OL) 27-Nov-18 03:01 AM overload 27-Nov-18 03:01 AM I'm on page 3 of the manual on how to interpret the reading... >.< 27-Nov-18 03:19 AM Good luck! ^^U 27-Nov-18 03:24 AM thanks 27-Nov-18 09:27 AM DAMN! 27-Nov-18 09:27 AM I have had to reconver the oven livestream video to a 22Gb file just to skip the errors in the video and turn it 90º, then recompress again to have a 600Mb file. A whole evening for that! :////// 27-Nov-18 09:27 AM (kept giving errors everywhere as I tried different configurations and compressions) 27-Nov-18 02:30 PM anything interesting to learn with a 60x magnification binocular microscope? 27-Nov-18 02:30 PM I have one where I'm temporarily living, acquired from landlords junk shelf c: 27-Nov-18 02:52 PM Yeah, printer prints great now. Time for some late night compressor disassembly! 27-Nov-18 03:26 PM @qualia you there? If so I have a couple additions to your playlist 27-Nov-18 03:26 PM I'm not sure if they match your style tho so listen before adding 27-Nov-18 03:26 PM The album "body riddle" by Clark is great focus music imo. It's industrial/IDM stuff 27-Nov-18 03:26 PM Actually I'm forgetting past that 27-Nov-18 03:26 PM But yeah give that a shot? 27-Nov-18 03:26 PM Actually one more thing: 27-Nov-18 03:26 PM https://youtu.be/Vb91HY28fZM 27-Nov-18 03:26 PM Artist took the album down cuz I guess they redistributed the songs among other albums? But the album has a continuous flow so like, that sucks 27-Nov-18 03:41 PM aw i love albums like that 27-Nov-18 03:41 PM that sucks 27-Nov-18 03:41 PM but hey, thank you! i'll throw it in my playlist 27-Nov-18 03:41 PM >_> which already has 15.5 hours of recommendations 27-Nov-18 03:41 PM :P 27-Nov-18 03:42 PM It's not on Spotify unfortunately but it's still on YouTube, and I have the original full album on a hard drive I corrupted the hell out of 27-Nov-18 03:42 PM (scalpeling all the files off of that drive is planned) 27-Nov-18 03:42 PM (I really love scalpel it's like magic) 27-Nov-18 03:42 PM was ist? 27-Nov-18 03:42 PM Ooooh scalpel is a magic data recovery tool! 27-Nov-18 03:42 PM It scans your hard drive, ignoring filesystems 27-Nov-18 03:42 PM It looks for raw file signatures 27-Nov-18 03:42 PM So, if you had a horrible corrupted ntfs tree, for example 27-Nov-18 03:42 PM That you maybe created by shrinking without applying the appropriate pre-steps for example 27-Nov-18 03:44 PM oh neat :o 27-Nov-18 03:44 PM oops, 27-Nov-18 03:44 PM And then wrote an ext4 partition at the end of, for example 27-Nov-18 03:45 PM hypothetically, you know; 27-Nov-18 03:45 PM And then maybe for example were surprised by the fact that Linux was claiming the hard drive seemed corrupted, for example 27-Nov-18 03:45 PM This definitely didn't happen to me 27-Nov-18 03:45 PM BUT IF IT DID HYPOTHETICALLY 27-Nov-18 03:45 PM You could tell scalpel a region to scan, and a set of header and footer magic to look for, and it would attempt to scan the entire hard drive for files matching that mask 27-Nov-18 03:45 PM And dump them to another location 27-Nov-18 03:45 PM It's of course useless if you use encryption, so I'm glad I didn't on this drive. 27-Nov-18 03:45 PM Hypothetically, I mean 27-Nov-18 03:45 PM Man I forgot how much this album slaps 27-Nov-18 03:45 PM Oh the transitions are so good aahhhhhhhhh 27-Nov-18 03:45 PM He like... Foreshadows the next track by bringing in the synths that are specific to it very subtly in the background mix 27-Nov-18 03:48 PM i'll prob put it on after this solar fields album 27-Nov-18 03:48 PM that rules actually :o 27-Nov-18 03:48 PM ghh, i need new IEMs 27-Nov-18 03:48 PM my etymotic HF5s are getting crunchy in the left ear ;.; 27-Nov-18 03:48 PM they lasted several really heckin solid years tho 27-Nov-18 03:48 PM ok back to coding bye 27-Nov-18 03:50 PM O/ 27-Nov-18 03:50 PM Lmk your thoughts when you hit it! 27-Nov-18 04:17 PM Wow, that's a great track 27-Nov-18 04:18 PM oh goddess bitcrushed guitar 27-Nov-18 04:18 PM SO GOOD 27-Nov-18 04:18 PM eee ~3~ 27-Nov-18 04:18 PM okbye 27-Nov-18 04:23 PM I'm glad y'all have the same taste in music 27-Nov-18 04:23 PM They're good tunes bront 27-Nov-18 04:25 PM ooh thats pretty good : D 27-Nov-18 04:27 PM God tier transition around 14:30 27-Nov-18 04:27 PM Actually you know what 27-Nov-18 04:27 PM @AdamMcCombs can we get a beeps-boops channel? 27-Nov-18 04:27 PM Do y'all think that would get used? 27-Nov-18 04:32 PM I have a few vaguely similar artists I'd like to share. 27-Nov-18 04:32 PM So yes 27-Nov-18 04:34 PM Heck yeah I haven't had a music sharing community in like... 8 years? 27-Nov-18 04:51 PM Check out the new channels 27-Nov-18 05:05 PM but yeah like. 27-Nov-18 05:05 PM i am most productive from like midnight on and i wish i could shift my schedule around to function like a normal human worm baby 27-Nov-18 05:05 PM been meaning to try melatonin again. last time i tried it i was apparently using much too large doses, and apparently too much actually makes it less likely to work? 27-Nov-18 05:05 PM hormones are weird 27-Nov-18 05:05 PM at least boss and coworkers are relatively lenient, like 'yeah there is not any humanly possible way i can physically make it into the office every single morning at 10:30 for this meeting so uhHh gonna dial in for it tia' 27-Nov-18 05:05 PM with, like, an hour commute (at least it's on the train so i can nap/read/distract myself on twitter/discord/irc/etc) and the two to three hours it takes me to get ready in the morning, i'd have to wake up at like. 6 am 27-Nov-18 05:09 PM Yeah I'm kinda the same way 27-Nov-18 05:09 PM I'm horrible at coming in at a regular time and my bosses and coworkers realized that and are totally ok with it 27-Nov-18 05:09 PM They got me a work phone so that they could contact me in case they needed something urgently 27-Nov-18 05:09 PM I work best from home between like 1 and 5 AM and have a horrible tendency to do all nighters right before the deadline 27-Nov-18 05:09 PM So there have been 6 times now that I've come into work at 7 AM, been like "hey uh I finished the thing I'm going home to sleep now' 27-Nov-18 05:09 PM I'm amazed I haven't been fired tbh 27-Nov-18 05:11 PM yeaah. i occasionally am on-call so i have the means to be pestered if i am needed by a thing-on-fire, but otherwise.. yeah 27-Nov-18 05:11 PM hey i mean if you can deliver results then like ideally it's all good 27-Nov-18 05:11 PM maybe not the best rhythm for not burning yourself out (further??) but it's valid enough 27-Nov-18 05:12 PM Yeah that's the thing, everyone on my team has that mantra figured out of "whatever works, so long as it helps you to be productive" 27-Nov-18 05:12 PM It's amazing honestly 27-Nov-18 05:12 PM Sorry, I'm gushing, I just really like my workplace 27-Nov-18 05:12 PM Last few places were kinda the opposite so it's been a continual surprise that good workplaces can exist 27-Nov-18 05:15 PM yeaah 27-Nov-18 05:15 PM that's a deeply unfortunately familiar feeling >_> 27-Nov-18 05:15 PM current workplace is ok i just kinda want out of tech 27-Nov-18 05:15 PM some of my vacuum shenanigans are kind of me desperately trying to turn this weird obsessive hobby into something worth putting on a resume 27-Nov-18 05:15 PM (kind of wishful thinking without a degree, i think, but.) 27-Nov-18 05:15 PM tech in particular seems to recognize that people without degrees can sometimes actually do useful work in this space (imagine that) and there is possibly also a 'hey they dropped out of highschool so we don't have to pay them as much' factor 27-Nov-18 05:15 PM i don't often see things like apprenticeships happening in like HEP or astrophysics tho 27-Nov-18 05:15 PM shrug.exe 27-Nov-18 05:22 PM I mean, astrophysics is basically a purely academic sector job, so you either need to work for government or a university 27-Nov-18 05:22 PM Government is achievable without a degree, but good luck finding a job at a university type place without one, all the grad students will think you're cutting in line >.< 27-Nov-18 05:22 PM That being said, CMU's cleanroom master technician didnt have a degree, iirc, and he basically ran the place 27-Nov-18 05:22 PM He was younger than all the people who worked for him too? 27-Nov-18 05:22 PM So there are definitely exceptions to the rule 27-Nov-18 05:44 PM yup, it's almost 03:00 and I just noticed that I lost focus and motivation around an hour ago 27-Nov-18 05:45 PM ... Holy heck is this real??? https://twitter.com/7NewsCQ/status/1067293961822208000?s=19 27-Nov-18 05:50 PM …There's video 27-Nov-18 05:58 PM Anyway, I think it's pretty rad that motivation is something I seem to have most days now. But it has ran out for the night and I'm going to bed shortly. 27-Nov-18 06:27 PM Yeah that's a good call 27-Nov-18 06:27 PM Good night @Leona 27-Nov-18 06:29 PM Good night @hedgeberg @qualia 27-Nov-18 06:29 PM gn! o/ dream well 27-Nov-18 06:44 PM O/ 27-Nov-18 06:44 PM Sleep well! 27-Nov-18 07:03 PM Oh my God this tweet 27-Nov-18 07:03 PM Major big warning for bad language, which we do not support in this discord: 27-Nov-18 07:03 PM End major big warnings 27-Nov-18 07:27 PM @hedgeberg 's description of work life sounds exactly like something I would say about how I manage (if you could call it that) my day job. I get stuff done, it just happens to all get done in clumps by pulling all nighters. 27-Nov-18 07:27 PM @qualia you probably already found this, but 300mcg of melatonin on an empty stomach works best for most people. LifeExtension makes a 6 hour time release 300mcg version that some people swear by. (I haven't tried it yet) 27-Nov-18 07:27 PM re: HEP jobs, I know a guy who's a supercomputer sysadmin at Argonne that recently started doing a side job on Argonne's APS beamline, so maybe start applying to nat'l labs? 27-Nov-18 07:45 PM hpc sysadmin stuff sounds like fun 27-Nov-18 07:58 PM that's an understatement 27-Nov-18 07:58 PM ANL is getting the first exascale system "aurora", in a couple years. have to knock down some walls to make the datacenter bigger first though 27-Nov-18 07:58 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20180817_122014-30822.jpg 27-Nov-18 07:58 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20180817_123444-2B9F2.jpg 27-Nov-18 07:58 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20180817_112610-1B3AF.jpg 27-Nov-18 07:58 PM cabinet and shelf levels of Mira 27-Nov-18 07:58 PM complete with hot swap/quick connect water cooling 27-Nov-18 07:58 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20180817_155109-B39B2.jpg 27-Nov-18 07:58 PM obligatory beamline pic 27-Nov-18 08:09 PM pretty 27-Nov-18 08:13 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20180817_154554-1300D.jpg 27-Nov-18 08:13 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20180817_160302-5D7D7.jpg 27-Nov-18 08:13 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20180817_153531-D117D.jpg 27-Nov-18 08:23 PM hmmm what to do tonight 27-Nov-18 08:23 PM OH right 27-Nov-18 08:23 PM i can try to get my usb microscope working again 27-Nov-18 08:50 PM actually no i should print those ball bearings... 27-Nov-18 08:50 PM hmm actually now im kinda wondering something 27-Nov-18 11:38 PM @qualia youre up 27-Nov-18 11:38 PM hows the work going? 27-Nov-18 11:38 PM noone is here to talk and ive resorted to watching anime while I cad to remain occupied 27-Nov-18 11:38 PM quiet chatrooms :< 28-Nov-18 01:23 AM i was playing video games because my brain wanted flashy lights and rng in my life 28-Nov-18 01:23 AM hpc pics....... very good pics 28-Nov-18 01:30 AM oh my gosh there's COOLANT FEEDS INTO THE BLADES 28-Nov-18 01:30 AM aAAaAa 28-Nov-18 01:30 AM blushes profusely 28-Nov-18 01:30 AM ok but like hpc cable management is extremely my ideal 28-Nov-18 01:30 AM i've never gotten to work in an env where everything's so homogenous that you can, like, .. do that 28-Nov-18 01:30 AM @hedgeberg how goes printin' 28-Nov-18 01:37 AM It's making a lot of "weeeew weeeeew" noises 28-Nov-18 01:37 AM And I think a couple of fans are like "ffffffff" 28-Nov-18 01:37 AM And some hot gunk is coming out? 28-Nov-18 01:37 AM And it's making a shape?????? 28-Nov-18 01:38 AM i'm currently soldering up switchmode power regulators to the raspi that'll be my remote observation camera thing and probably also vacuum controller 28-Nov-18 01:38 AM very exciting 28-Nov-18 01:38 AM I love shapes 28-Nov-18 01:38 AM That sounds much cooler tbh 28-Nov-18 01:38 AM most of my friends are, or have been, shapes 28-Nov-18 01:39 AM Switchmode? You mean switching, or is there a whole kind of power regulator I don't know of? 28-Nov-18 01:39 AM My best friend makes shapes sometimes 28-Nov-18 01:39 AM Sometimes she's a ball, and sometimes she's long 28-Nov-18 01:39 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20181113_212826-E3408.jpg 28-Nov-18 01:39 AM switching yeah 28-Nov-18 01:40 AM My best friend 28-Nov-18 01:40 AM a Good Friend 28-Nov-18 01:40 AM Sorry I'm really tired and I'm acting like a big good 28-Nov-18 01:40 AM *goof 28-Nov-18 01:40 AM continue thine goofery 28-Nov-18 01:40 AM or don't that's cool too 28-Nov-18 01:40 AM oh we have a bep bop voice channel now too huh! 28-Nov-18 01:40 AM i will storm in there in the dead of night and play piano poorly 28-Nov-18 01:42 AM did you mean: sometime this morning? 28-Nov-18 01:42 AM would love to listen, but my internet here is terrible :< 28-Nov-18 01:44 AM You know 28-Nov-18 01:44 AM We could make an icecast server like I did when I was streaming 28-Nov-18 01:44 AM (I used icecast to stream my music separately so that twitch wouldn't flag my stream) 28-Nov-18 01:44 AM But there are ways to have icecast autodj and then anyone can take over 28-Nov-18 01:45 AM oh is that the secret to doing that 28-Nov-18 01:45 AM huh 28-Nov-18 01:45 AM And when they relinquish control then it reverts 28-Nov-18 01:45 AM wait so did you just use twitch for silent video 28-Nov-18 01:45 AM No, I used it for hacking things 28-Nov-18 01:46 AM oic 28-Nov-18 01:46 AM I did like, my switch hax live 28-Nov-18 01:46 AM Or when I was working on uart2nand 28-Nov-18 01:46 AM For modifying the wiiU's stage 2 bootloader 28-Nov-18 01:46 AM That kinda thing, it was really fun to stream 28-Nov-18 01:46 AM i've done a couple hacking-on-things videos with like radio on in the background and then twitch music detection algos turn my video streams to swiss cheese 28-Nov-18 01:46 AM I split audio channels using uhhhh 28-Nov-18 01:46 AM What was it 28-Nov-18 01:46 AM Shoot 28-Nov-18 01:46 AM Uh 28-Nov-18 01:46 AM JACK 28-Nov-18 01:46 AM and cadence 28-Nov-18 01:46 AM Seriously if JACK and cadence aren't the single best reason to use linux I don't know what is 28-Nov-18 01:48 AM YEAH ACTUALLY 28-Nov-18 01:48 AM jack is exquisite 28-Nov-18 01:48 AM Turns out people really like watching hackers stream 28-Nov-18 01:48 AM Honestly. 28-Nov-18 01:48 AM I tried using obs on windows instead 28-Nov-18 01:48 AM Hated it 28-Nov-18 01:48 AM i have it hooked up to my 18ch audio interface and just kinda sit pulseaudio atop it for .. everything else 28-Nov-18 01:48 AM Hated it so much 28-Nov-18 01:48 AM No jack is a deal breaker 28-Nov-18 01:49 AM gotta buncha channels going into my four-bus 16ch mackie mixer so i can route stuff around willy-nilly and occasionally hit the wrong send toggle button and blast my dang ears out 28-Nov-18 01:49 AM Pulseaudio's jack sinks are amazing 28-Nov-18 01:49 AM ashame said mixer is scratchy and noisy as hell and sometimes my left speaker just ceases to exist 28-Nov-18 01:49 AM but it's good 28-Nov-18 01:49 AM pro audio routing has ruined me completely 28-Nov-18 01:50 AM Yeah I really need to get a proper mixer at some point 28-Nov-18 01:50 AM But my mic is a blue yeti and that actually is really nice and nice analog mics are expensive 28-Nov-18 01:50 AM And that means I have to be digital at at least one level 28-Nov-18 01:50 AM I actually had a really funny bug with the mic, there was a grounding issue 28-Nov-18 01:50 AM And it would build up charge and ESD would blow out the front-end temporarily 28-Nov-18 01:50 AM It would screw up everything and I'd need to restart the stream 28-Nov-18 01:52 AM i have uhh a sm58 dangling on a long xlr cable on the other side of the room with a shitload of gain and a hardware compressor tapped into that through a send/receive port and a dynamic flat-response behringer calibration/impulse response mic connected directly into the back of my mixer lmao 28-Nov-18 01:52 AM it's a clusterfluff 28-Nov-18 01:52 AM So I got these stupid little wireless transmitters so that I could get my low-latency monitor from the mic while not being physically connected 28-Nov-18 01:52 AM they're all mixed down to mono and into one channel just so i can like. walk around and talk to people 28-Nov-18 01:52 AM oh that's nice actually 28-Nov-18 01:52 AM my ideal setup would have some wireless lapel mics or a Good headset 28-Nov-18 01:52 AM and then maybe like one (1) nice dynamic microphone for when i feel compelled to asmr at people 28-Nov-18 01:54 AM You know I should really think about getting a really nice 16 channel mixer at some point 28-Nov-18 01:54 AM One with integrated dacs and adcs that I can use to join channels together and things. Then I can make the setup even more complicated but I won't need to get Jack configured each boot 28-Nov-18 01:54 AM I miss streaming :( 28-Nov-18 01:54 AM Had to stop because got doxxed 28-Nov-18 01:54 AM @qualia what mixer do you use? 28-Nov-18 02:04 AM doxxed? rly? 28-Nov-18 02:34 AM sort of sick/died in bed 28-Nov-18 02:34 AM What does have cooled blades? 28-Nov-18 02:35 AM oof 28-Nov-18 02:35 AM nixie, there were pics of some compute cluster at ANL posted up above, I think 28-Nov-18 02:36 AM Ah, going to see 28-Nov-18 02:36 AM Oh WOW 28-Nov-18 02:37 AM @hedgeberg i have but do not recommend a Mackie 1604-VLZ PRO from 1892 28-Nov-18 02:38 AM I though it was about turbines, but that is extremely nice too 28-Nov-18 02:38 AM i am not sure what you mean about DACs and ADCs in a mixer bc they usually do not need to do that sort of thing to do funky routing shenanigans 28-Nov-18 02:38 AM though for very modern ones all that is off the table 28-Nov-18 02:39 AM Are there wireless cams for streaming? 28-Nov-18 02:39 AM (nice musics, everyone, will add some later) 28-Nov-18 02:39 AM Why doxxed, hedgebegmrg? 28-Nov-18 02:41 AM look for a mixer with multiple aux buses (the 1604-vlz pro has four, approximately; you can kinda get 6 out of it in a weird toggle-y way) and then you can basically pull individual channels in and out of those aux buses as needed and route them back into another channel or out to whatever send(s) you have available 28-Nov-18 02:41 AM the flexibility of a Grown-Up Mixer is actually legitimately overwhelming at first and also also always get more channels than you think you'll need bc when you inevitably hit whatever limit you originally went with you'll be upset 28-Nov-18 02:41 AM https://www.sweetwater.com/store/detail/Sig22MT--soundcraft-signature-22-mtk-mixer-and-audio-interface-with-effects i've had this on my shopping list for a while when i have serious funbucks to throw at music hardware again 28-Nov-18 02:41 AM the nice thing about that'un is that it is also a 22 channel audio interface, so you can do multitrack recording right off of it. or stick vsts directly into sends/returns on a channel as if they were a hardware device 28-Nov-18 02:41 AM there's a 12 channel version also but i have a lot* of hardware synths so i can approximately justify it 28-Nov-18 02:41 AM * not really that many tbh 28-Nov-18 02:46 AM I saw your tweet from the desert and now the song is mashing up with thunderstruck in my head… it's great 28-Nov-18 02:48 AM :D 28-Nov-18 03:40 AM You need an helicopter too in thst picture. /Ofers his lime green drone/ 28-Nov-18 11:34 AM Last decent mixing desk I played with was a Neve Legend VR with flying faders. But that is overkill for streaming. Doubles up as a good space heater 28-Nov-18 11:34 AM And, no, I can't afford one of those, or the electricity to run it. 28-Nov-18 03:26 PM Tfw I make the horrible decision to try and explain the issue of civil asset forfeiture on Twitter 28-Nov-18 03:26 PM Oof 28-Nov-18 03:27 PM "let's explain complex issues to people who think criminal law is as simple as 'punish the bad people', hedge" 28-Nov-18 03:27 PM In so doing, I then proceeded to miss my bus 28-Nov-18 03:27 PM So 28-Nov-18 03:27 PM I'm having A Time™ 28-Nov-18 03:28 PM And then you are like how do we know they are bad? 28-Nov-18 03:30 PM No more like, sure, but how bad is bad? 28-Nov-18 03:30 PM Bad enough to justify taking someone's car despite their sentencing being a small fee? 28-Nov-18 03:30 PM Idk, criminal justice is a big mess and noone wants to understand the complexities ever since the "tough on crime" days 28-Nov-18 03:44 PM Gf was jury like a month ago, and now sees justice in a different light. 28-Nov-18 04:11 PM Yeah. It's really complicated 28-Nov-18 05:29 PM Hm...having to pick up dog vomit just fully awoke me. It seems I have a whole night for myself...what shall I do? XD 28-Nov-18 05:29 PM (well, more like just 4,5h) 29-Nov-18 02:02 AM @hedgeberg Re: HallOn sensor I don't know. Servo+limit switch seems to be the status quo, because it's cheap and fast. I don't know of a configuration that allows for mesh leveling, bc it assumes a flat and level bed? (might not be a problem for you) I think the magnetic sensors only have a bed rep, because some products rely on ferromagnetics?/magnets? embedded in the build surface instead of a probe, whose position gets measured by the sensor? I'll tell you my results when I got it and had the chance to test it. 29-Nov-18 02:39 PM Yeah 29-Nov-18 05:00 PM Hey uh 29-Nov-18 05:00 PM I keep seeing people talk about being pro-dprk on Twitter and like 29-Nov-18 05:00 PM That is a joke? Right? 29-Nov-18 05:35 PM i have no idea but i've heard it talked about in only the most fleeting capacity a few months ago 29-Nov-18 05:35 PM and i guess again, now, maybe ?? 29-Nov-18 05:35 PM like back then and possibly now i think it was meant to be an analytical tool pivoted against US imperialism but it's .. i don't know 29-Nov-18 05:35 PM a couple years ago i first heard the phrase 'antifascist' and i was like 'who in the heck is pro fascist'. and then i read some history and started following the news cycle and i had myself a learning experience 29-Nov-18 05:35 PM but idk what even is the thing 29-Nov-18 05:35 PM tabs over to this server; immediately starts losing work motivation 29-Nov-18 05:35 PM oh no 29-Nov-18 07:13 PM Yeah I also dk the thing 29-Nov-18 07:13 PM I just find it unsettling because being anti imperialist does not mean, or at least should not mean, being pro-dprk. I think dprk is a hell of a messy thing to talk about and it's not safe to paint the country and the people in it as evil like is often done in the US, but it is led by a very dangerous person who starves his own citizens for the sake of investing solely in military and uh 29-Nov-18 07:13 PM Idk if that's really something someone should be pro-anything towards 29-Nov-18 07:18 PM yeah i uh 29-Nov-18 07:18 PM So I'm very confused why left leaning people would be discussing being for it? It seems like the antithesis of progressive thought and I just 29-Nov-18 07:18 PM I am confusion 29-Nov-18 07:18 PM occasionally see very weird polarized ideological splitting happening in/adjacent to certain social-justice-active circles and it makes me extremely suspicious 29-Nov-18 07:21 PM Yeah, right?? 29-Nov-18 07:21 PM That was my first thought, was that it was troll discourse because it just seems so strange 30-Nov-18 12:12 AM I believe that splitting like that is probably a good indicator of some kinds of manipulation. 30-Nov-18 12:12 AM Given most people are capable of more intelligent thought than that. (I hope!) 30-Nov-18 02:10 AM hello 30-Nov-18 02:11 AM good morning! 30-Nov-18 02:19 AM \o/ 30-Nov-18 02:22 AM Uh, me thinks me found a scope 30-Nov-18 02:22 AM 500 MHz, 4 ch, 2 Gs/s, tek 30-Nov-18 02:22 AM oscilloscope? 30-Nov-18 02:22 AM oh cool 30-Nov-18 02:23 AM yep 30-Nov-18 02:23 AM only 50 k per channel, but upgradeable to 8 M 30-Nov-18 02:23 AM possibly hackable 30-Nov-18 02:23 AM and only ~500€ 30-Nov-18 02:23 AM problem: The seller is on the other side of germany and dosen't accept paypal 30-Nov-18 02:25 AM MDO50xx? 30-Nov-18 02:25 AM aeh, MDO30xx i mean sry 30-Nov-18 02:26 AM way older 30-Nov-18 02:26 AM oh ok 30-Nov-18 02:26 AM I don't think a MDO will go that cheap in the next couple of years 30-Nov-18 02:26 AM no, it's a TDS 754D 30-Nov-18 02:27 AM ah ok 30-Nov-18 02:29 AM and it's even got DPO! 30-Nov-18 02:42 AM nice 30-Nov-18 02:46 AM yep 30-Nov-18 02:46 AM god damn it, I'm already starting to get hyped and I won't even see the scope for at least a month, if I buy it that is >.< 30-Nov-18 02:51 AM XDDD 30-Nov-18 02:51 AM Good luck! 30-Nov-18 02:51 AM Totally OFF-off topic, but had to share this: 30-Nov-18 02:51 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/unknown-548CF.png 30-Nov-18 02:51 AM (you need to open the original, it's too big to be properly seen otherwise) 30-Nov-18 02:52 AM haha, very nice 30-Nov-18 02:52 AM but what's the last thing? 30-Nov-18 03:09 AM it's a can opener, right? 30-Nov-18 03:09 AM https://www.youtube.com/watch?v=HVffJqcG33c style 30-Nov-18 03:11 AM huh, I've never seen that design before 30-Nov-18 08:35 AM yeah 30-Nov-18 08:44 AM It's made just by stamping, the cheaper the better. XD 30-Nov-18 08:45 AM I wonder if the production models survive a can without bending 30-Nov-18 08:50 AM XDDDD, yes they do. They are usually steel, and much harder, proportionately, than the can metal. 30-Nov-18 08:51 AM experienced and being gentle, y not? 30-Nov-18 08:52 AM Bad experience in the past with camping gear 30-Nov-18 08:55 AM Had to chisel them open with a butter knife and a rock because the can opener bent without leaving more than a dent 30-Nov-18 08:57 AM ROOOOOOOOOOOOFL 30-Nov-18 08:57 AM https://www.youtube.com/watch?v=DyGLE0usN_I 30-Nov-18 08:57 AM Also, we should remember the can opener was invented AFTER the can. 30-Nov-18 08:58 AM ^^ Yeah, but weren't earlier cans just soldered lead flasks? 30-Nov-18 08:58 AM goes check wikipedia 30-Nov-18 08:58 AM No, they where tin cans, BUT used tin-lead solder to close them, wich lead to lead poisoning. 30-Nov-18 08:58 AM 30-Nov-18 09:16 AM Huh, yeah. I thought before that came what essentially were lead sealed bottles, but that might just be the same 01-Dec-18 07:30 AM glass encapsulated resistor in ultrasonic cleaner, yes or no? 01-Dec-18 07:38 AM Probably fine? Have one you can test? 01-Dec-18 07:45 AM if I did I'd try instead of asking ^^ 01-Dec-18 07:45 AM bound a 10^11 ohm resistor on the scrapyard, and I want to clean it 01-Dec-18 07:55 AM I would just scrub it if worried 01-Dec-18 07:56 AM yep, thanks! 01-Dec-18 11:22 AM Neat. a chipfab themed music video https://www.youtube.com/watch?v=0wrsZog8qXg 01-Dec-18 01:42 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20181201_223721-D9975.jpg 01-Dec-18 01:42 PM you can't tell me what to do! 01-Dec-18 01:42 PM Yeah, sure. 01-Dec-18 01:42 PM (about the video) 01-Dec-18 02:22 PM Heh, swapmeet seems to atract offtopi stuff 01-Dec-18 02:23 PM yep 01-Dec-18 02:23 PM I haven't found a proper scrapbin at my uni yet, but I've got a scrapyard close to me which I weekly go to 01-Dec-18 02:23 PM todays raid was a 100 Gohm precision resistor, 2 thorlabs power meters, stuff like that ^^ 01-Dec-18 02:23 PM but no triax so far 01-Dec-18 02:25 PM Heh. triax seems to have always been quite odd anf specialized 01-Dec-18 02:25 PM The local uni has multiple scrapbins, but the metal and e-waste bins at one of the EE buildings has been the best so far. 01-Dec-18 02:30 PM my uni hast 2 campuses (campi?), one in the middle of the city where all the lectures are held, one outside of the city with a lot of research insitutes 01-Dec-18 02:30 PM so far I've mostly been in the city, but I really want to go through the bins outside 01-Dec-18 02:30 PM their security there is... funny 01-Dec-18 02:30 PM I found an outside cabinet with 4 bottles 80% D2 20% N2 which was unlocked 01-Dec-18 02:30 PM the temptation was strong 01-Dec-18 02:32 PM Some uni folks are just blind to the real prices of things from what I hear. 01-Dec-18 02:33 PM yep, definately 01-Dec-18 02:33 PM except for the workers at the fission neutron source, the boss there makes sure that everyone knows they are burning uranium every day that costs more than their yearly salary xD 01-Dec-18 02:36 PM Hah 01-Dec-18 02:47 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/Capture-707C0.PNG 01-Dec-18 02:47 PM what the...? 02-Dec-18 01:46 AM That is an interesting input... 02-Dec-18 01:46 AM I really hope that isn't true. 02-Dec-18 01:49 AM The thing is: Mistakes happen, maybe it's the wrong unit, etc, but I would not know what else goes there? 02-Dec-18 03:13 AM what do you do when it's getting cold in your room? That's right, you pump down your chamber and turn on the diffusion pump! 02-Dec-18 03:39 AM I could turn on the oven too. XDDD 02-Dec-18 04:08 AM That moment when you are uploading a gerbers to JLC2PCB and the drill holes keep on dissapearing...until you change the name of the ZIP, and it updates in the server... ^^U 02-Dec-18 04:13 AM ...lol 02-Dec-18 04:14 AM I will have to wait to make them, though, it escalated pretty quickly in price (for my economy right now) 02-Dec-18 04:26 AM (besides, I have to buy the components too, and 0,1% resistors are not super cheap. 02-Dec-18 11:13 AM holy [censored by bot] 02-Dec-18 11:13 AM I just lifted my speakers 15 cm off the desk 02-Dec-18 11:13 AM it's a whole new world! 02-Dec-18 11:13 AM feels like listening to flac for the first time after only knowing bad .mp3 rips 02-Dec-18 11:31 AM XDDDDD 02-Dec-18 11:31 AM We are not going to sound better on the voicechat, no matter what. 02-Dec-18 11:32 AM the riser takes 8 hours to print, so I've only got one, the second speaker is currently standing on 3 energy drink cans xD 02-Dec-18 11:33 AM ROFL 02-Dec-18 11:33 AM but they're empty, so not exactly non-resonating 02-Dec-18 11:34 AM fill them with water? 02-Dec-18 11:34 AM well, I'm gonna print the second one next tuesday, until then I'll have to make due with unsymmetrical sound 02-Dec-18 11:34 AM too risky, I know myself 02-Dec-18 05:32 PM from documentation my eyes are unfortunately stuck reading at this moment: 02-Dec-18 05:32 PM So, the new commands we need to send: N5/8: "R" & CHR(33) & CHR(7) & CHR(35) & CHR(142) 03-Dec-18 05:22 AM @GigaSquirrel BOOOOOOOOO! 03-Dec-18 05:22 AM sips his cocoa 03-Dec-18 05:22 AM goes and makes some coffee 03-Dec-18 08:29 AM Goes and makes a hot chocolate, with some triple Sec flavouring, some cream and a bunch of vegan marshmallows. (Because they're nicer) 03-Dec-18 08:37 AM omnom 03-Dec-18 08:40 AM what on earth is a vegan marshmallow...?????? 03-Dec-18 08:42 AM sugar foam obv 03-Dec-18 08:42 AM I imagine they replace the gelatine with pektine? 03-Dec-18 08:45 AM up until now I didn't even know Marshmallows aren't usually vegan :D 03-Dec-18 08:46 AM Ah yeah. It's surprising how many things aren't. But also which odd products are 03-Dec-18 08:46 AM Like: Oreos are vegan, but all the knock-offs aren't. A lot of plant-fat spreads aren't. Quite a few noodle brands aren't. bitter-sweet chocolate often is. 03-Dec-18 08:46 AM Most wine isn't. 03-Dec-18 08:49 AM interesting to know. 03-Dec-18 08:49 AM wine isn't?¿?¿ 03-Dec-18 08:49 AM XDDD 03-Dec-18 08:49 AM wonders how many vegans there are in the server 03-Dec-18 08:50 AM (I'm not vegan. I just share a kitchen with one) 03-Dec-18 08:51 AM XDDD 03-Dec-18 08:59 AM how come wine isn't? 03-Dec-18 09:01 AM Gelatine used for clearing out sediments faster 03-Dec-18 09:01 AM tortured grape souls screams when you open the bottle 03-Dec-18 09:01 AM ah 03-Dec-18 09:01 AM That too 03-Dec-18 09:01 AM XDDDD 03-Dec-18 09:04 AM lol, the domain anti.social is available and not registered "Make an offer" though 03-Dec-18 09:04 AM xD 03-Dec-18 09:07 AM I would own it... 03-Dec-18 09:07 AM XDD (my gf too) 03-Dec-18 09:08 AM The thing's just: some of the domain names with a price point are already in the 4 digit range 03-Dec-18 09:10 AM ¬¬ 03-Dec-18 10:13 AM yea 03-Dec-18 10:13 AM I'm yet to buy over 10usd/year domains 03-Dec-18 10:14 AM Gotta say, the vegan marshmallows I have encountered so far have been awesome in the mouthful department. Like proper lush melt in the mouth, rather than feeling like you are chewing an endless gelatine blob. 03-Dec-18 10:15 AM Gota try that some day 03-Dec-18 10:15 AM I have never really had strong preference to marshamllows anyway 03-Dec-18 10:16 AM My wife is currently cooking some brownies... 03-Dec-18 10:16 AM So, I am sorted for high levels of sugar and fats.. 03-Dec-18 10:17 AM We have something similar to marshmallows in spain, we call them "clouds", and they're more sweet and gummy than what I have tasted as "imported" marshmallows. 03-Dec-18 10:20 AM Hm. Do I need to send you a pack of vegan marshmallows then? 03-Dec-18 10:24 AM XD, don't worry, I guess I can find some around. 03-Dec-18 10:24 AM (off-off-topic, not trying to steal the channel: https://www.youtube.com/watch?v=Wq8kS6UoOrQ ) 03-Dec-18 10:34 AM TBH, it is no great shakes to send a packet. 03-Dec-18 11:18 AM Na, really, don't worry. But thanks for the offer 03-Dec-18 03:34 PM @qualia I can't believe I forgot the Alamo 03-Dec-18 03:34 PM By which I mean the ballpit 03-Dec-18 03:34 PM And now you've reminded me and I'm having vivid flashbacks to 2013 03-Dec-18 03:39 PM ikr? 03-Dec-18 03:39 PM i miss the old internet, kinda 03-Dec-18 03:39 PM Speaking of sticking your face to the viewport: 03-Dec-18 03:39 PM http://www.theplaidzebra.com/wp-content/uploads/2015/11/5_why-I-stopped-shaving.jpg 03-Dec-18 03:39 PM weird twitter raised me, and then the world got frightening 03-Dec-18 03:40 PM http://www.museumofquackery.com/ephemera/tricho.htm 03-Dec-18 03:40 PM MM THAT LOOKS SAFE 03-Dec-18 03:40 PM good gravy 03-Dec-18 03:41 PM oh it's permanent allright 03-Dec-18 03:41 PM permanent damage to your proteins that is 03-Dec-18 03:43 PM this is probably my desperate trans girl side speaking but i wonder if modern ALARA LET techniques and very finely focused beams directly into follicles a la electrolysis could ever be safe enough to be worth investigating 03-Dec-18 03:44 PM I mean ... I would investigate 03-Dec-18 03:45 PM considering medical uses of substantial amounts of radiation are basically reserved for 'some overgrown thing in your body is literally killing you so we have to very meticulously kill it first', 03-Dec-18 03:45 PM files away in the awful-but-fascinating ideas drawer 03-Dec-18 03:45 PM By 1970, one third of all radiation-induced cancer in women traced to X-ray hair-removal. 03-Dec-18 03:45 PM well, it was popular :S 03-Dec-18 03:47 PM what other ways were there for civilians to get radiation damage? 03-Dec-18 03:48 PM Radium Everywhere 03-Dec-18 03:48 PM some uranium glazes are pretty hot 03-Dec-18 03:48 PM ... Ah, right. 03-Dec-18 03:48 PM and lots of, like, Revigorator-type products for imbibing beverages with radon 03-Dec-18 03:48 PM would be my guess 03-Dec-18 03:48 PM also like, shoe-fitting fluoroscopes were apparently a big deal for a bit.. 03-Dec-18 03:48 PM we just kinda went totally nuts with the radiation for a bit there 03-Dec-18 03:49 PM Sounds awesome, in the original sense of the word 03-Dec-18 03:49 PM This magical technology being used in every possible way. 03-Dec-18 03:49 PM (And then the horror when research figured out your genome doesn't like it much) 03-Dec-18 03:51 PM honestly yeah. i think a lot of the wonder that led to that sort of cavalier 'we need to use this on EVERYTHING' got quenched in a really saddening way when we comprehensively found out that, like.. this is not good to mix with biological things that ought to stay alive 03-Dec-18 03:51 PM mhm 03-Dec-18 03:51 PM it's like. i find this sort of thing profoundly fascinating and i certainly understand the fear but i think that any dangerous thing handled with due respect needn't be ostracized 03-Dec-18 03:51 PM ... that said, i'm not about to go blasting my eyebrows into shape with tungsten bremsstrahlung 03-Dec-18 03:52 PM Yeah, that's a fair point 03-Dec-18 03:52 PM but, y'know 03-Dec-18 03:54 PM I personally am not very comfortable even knowing things will probably only kill me a little, 03-Dec-18 03:54 PM but the more I'm learning about ... like everything doing that ... 03-Dec-18 03:54 PM like not dying doesn't seem to be an option. Might as well live a little 03-Dec-18 03:54 PM Completely different mood/topic, but as a German I find it amazing how many world-widely scientific terms are just easily comprehensible in German (Schlieren, Bremsstrahlung etc) 03-Dec-18 04:00 PM oh, like bremsstrahlung? :D 03-Dec-18 04:00 PM ^.^ 03-Dec-18 04:00 PM i love the way german agglutination works, especially in the context of scientific terminology 03-Dec-18 04:01 PM Yeah. It's truly an artform here 03-Dec-18 04:01 PM one of my favorite nonsensical ones was from the folks who named the betatron 03-Dec-18 04:01 PM The name "betatron" (a reference to the beta particle, a fast electron) was chosen during a departmental contest. Other proposals were "rheotron", "induction accelerator", "induction electron accelerator", and even "Außerordentlichehochgeschwindigkeitselektronenentwickelndesschwerarbeitsbeigollitron", a suggestion by a German associate, for "Hard working by golly machine for generating extraordinarily high velocity electrons" or perhaps "Extraordinarily high velocity electron generator, high energy by golly-tron." 03-Dec-18 04:02 PM sweet! 03-Dec-18 04:03 PM (shamelessly stolen from wikipedia) 03-Dec-18 04:03 PM An elective course for my next semester is called Hochleistungsrechnerarchitekturpraktikum 03-Dec-18 04:04 PM oh that sounds like fun :o 03-Dec-18 04:04 PM (super computer architecture practicum) 03-Dec-18 04:04 PM *high-performance 03-Dec-18 04:05 PM hpc cluster interconnect architecture has always kinda fascinated me from a distance 03-Dec-18 04:05 PM strange meshes and toruses and such 03-Dec-18 04:05 PM but then i don't know much about cpu architecture to begin with, so it is mostly a novelty thing 03-Dec-18 04:07 PM I've been wanting to make a breadboard computer for a while. To kinda get into digital electronics and deepen my understanding of CPUs 03-Dec-18 04:07 PM Ben Eater on YT demonstrated how to really well 03-Dec-18 04:08 PM @qualia I started on Reddit and 4chan >.< 03-Dec-18 04:08 PM I somehow got pure very suddenly 03-Dec-18 04:08 PM I went from more radical to less radical, although I guess arguably 4chan was a lot less uh... Nazi? Back then? Idk I honestly don't remember it well 03-Dec-18 04:08 PM Well I guess still radical, just a big swing from bad communities to less bad? 03-Dec-18 04:11 PM (Fun-fact re betatron: The german article doesn't feature the etymology) 03-Dec-18 04:12 PM Oh shoot 03-Dec-18 04:12 PM I miss nonsense-post Tumblr 03-Dec-18 04:12 PM Now the internet is just scary all the time 03-Dec-18 04:14 PM my entire internet social history is, like.. time travel forums (i was like 10 ok) -> powerlabs.org -> many years of runescape (oh no) -> winmx chatrooms -> 4chan, briefly -> many years of Weird Furry IRC -> "irl" -> twitter -> discord + irc again kinda ?? 03-Dec-18 04:14 PM i guess powerlabs wasn't really social but i was all like. that orbit of Old Science Internet 03-Dec-18 04:14 PM it makes me happy that bigclive is still around 03-Dec-18 04:18 PM My internet social history begins like this year tbh. Before then I was never part of any non-local online thing. Even when I played WoW briefly. 03-Dec-18 04:19 PM ah! apparently bigclive came out as gay! ahh! ️‍ 03-Dec-18 04:19 PM that's so lovely 03-Dec-18 04:19 PM @Leona well, welcome to the online :D 03-Dec-18 04:20 PM Thanks! 03-Dec-18 04:20 PM (like. Not at all related to me having been figuring out myself and looking for support groups and fellows, nu'uh) 03-Dec-18 04:25 PM i mean, so it goes 03-Dec-18 04:25 PM i only ever really found community when i started looking for people who, like, really understood what the heck i was going through/feeling/etc 03-Dec-18 04:25 PM prior to that it was just internet randos and one or two school friends 03-Dec-18 04:26 PM Yeah, that sounds relatable. Even though I'm not sure I've arrived there yet? But I'm getting there 03-Dec-18 04:26 PM (It helps to have a therapist, it really does) 03-Dec-18 04:28 PM therapists are useful for sure, esp. if you find a good one you really can connect with 03-Dec-18 04:28 PM but yeah, it's all a process :3 03-Dec-18 04:28 PM Mine seems to slowly accept non-binary gender is a thing he should support, so I feel like I'm in adequate hands. 03-Dec-18 04:36 PM hey, right on c: 03-Dec-18 04:36 PM if you ever wanna talk about such things, i am extremely unapologetically nonbinary in personal and professional capacities, and have been functioning quite comfortably as such for ... i'll be 5 yrs on the 7th :o 03-Dec-18 04:38 PM Thanks for the offer. I'll take you up on that. 03-Dec-18 04:38 PM Preferred com channel? 03-Dec-18 04:40 PM could be here, or y'could ping me directly if you prefer c: 03-Dec-18 04:40 PM Also: Wohoo! Upcompin septenary! 03-Dec-18 04:40 PM DMs are always open, though i'm sometimes kinda flaky about responding in a timely fashion 03-Dec-18 04:40 PM \o/ 03-Dec-18 04:42 PM Very well, thank you :) 03-Dec-18 04:42 PM ^.^ 03-Dec-18 08:49 PM Queer Power, I'd say. Also, good morning, y'all! 03-Dec-18 10:11 PM hi so i was looking at https://www.iximeow.net/public_files/uranus_20181122.gif again and it struck me that most of the observed motion is uh, us moving 03-Dec-18 10:11 PM and wow space is w i ld 03-Dec-18 10:42 PM A few hours late perhaps, but a quality therapist - pretty close to gold. 03-Dec-18 10:42 PM Not sure what state I would be in without mine. 04-Dec-18 12:47 PM Yeah. I painfully notice that every time mine goes on vacation 04-Dec-18 12:57 PM Nothing like the fun of discovering yourself. 04-Dec-18 12:58 PM Nothing like having a bad therapist and ending up meeting with your maths teacher for therapy sessions 04-Dec-18 12:59 PM oof 04-Dec-18 01:01 PM he was actually pretty good 04-Dec-18 01:01 PM but now that school and puberty are over I don't really need one anymore, which is nice 04-Dec-18 01:12 PM That's great, but I got the impression that they generally discouraged dual relationships? 04-Dec-18 01:12 PM what do you mean by dual relationships? 04-Dec-18 01:12 PM poly? 04-Dec-18 01:12 PM or going to multiple therapists? 04-Dec-18 01:23 PM Ah, no, sorry. 04-Dec-18 01:23 PM Like, more than just the counselling relationship 04-Dec-18 01:23 PM so, having other dimensions to the relationship. 04-Dec-18 01:23 PM And, if he was good, it doesn't really matter. 04-Dec-18 01:24 PM yeah, no, he was really good at separating things 04-Dec-18 01:25 PM That takes some skill - so yeah, it sounds like you had someone very good 04-Dec-18 01:25 PM I also think my issues weren't as deeply rooted (?) as others 04-Dec-18 03:00 PM Yeah, some stuff is hard. 04-Dec-18 03:08 PM Good luck with yours, we believe in you! 04-Dec-18 03:18 PM TY. Psychiatrist made comment about family of origin... 04-Dec-18 03:18 PM Will get through this. 04-Dec-18 03:18 PM And, hey, it is also great experience for understanding others too. Have already been able to have some conversations with team members that I wouldn't have been able to if I hadn't had my own challenges. 04-Dec-18 03:41 PM /gives all his useless support/ 04-Dec-18 08:31 PM Heh I am sure it is not useless - just knowing helps. 04-Dec-18 09:09 PM I haven't had any of those internal fights to solve or self-understand, so I can only truly feel/understand so much, still I'll try. ^^U 04-Dec-18 09:14 PM Nothing else anyone can dooo 04-Dec-18 09:14 PM Hmm so I find out two of the schools I went to have Wikipedia pages? 04-Dec-18 09:14 PM Weird 04-Dec-18 09:14 PM XDDD 04-Dec-18 09:14 PM It only requires a handful of happy ex-alumni to edit the pages,I guess. 04-Dec-18 09:15 PM Oh, I was a handful at school. Threatened with educational psychologist by age 10. 04-Dec-18 09:15 PM Guesa who was the difficult one. 04-Dec-18 09:16 PM ^^U 04-Dec-18 09:16 PM a kid should never be trheatened with that, I think. 04-Dec-18 09:16 PM Nearly got thrown out, and apparently that was a school I "settled into" 04-Dec-18 09:17 PM I mean, I'm sure there are ways to convince him to get help, if it is really needed. 04-Dec-18 09:18 PM I think it might have been more of a threat for my parents? Idk. Kids are good at absorbing info, but not interpreting it. 04-Dec-18 09:18 PM Still, the science teacher there believed in me 04-Dec-18 09:18 PM Otherwise, idk, might not be here? 04-Dec-18 09:19 PM Glad science got inside you. (XD ) 04-Dec-18 09:20 PM He was cool with me, could see what interested me, made time for me. 04-Dec-18 09:21 PM I can relate to that kind of teacher. I had one that allowed me inside the workshop at my own leisure to expand my mind. 04-Dec-18 09:21 PM Oh, that is so awesome when that happens. 04-Dec-18 09:22 PM I think I still have somewhere that first lathe piece I made in aluminium. 04-Dec-18 09:22 PM XD 04-Dec-18 09:24 PM Niiice 04-Dec-18 09:24 PM Makes a huge difference 04-Dec-18 09:24 PM So the science teacher was in one of the schools, what about the other? 04-Dec-18 09:25 PM Hmm, the other was the wrong place for me. 04-Dec-18 09:25 PM Buuut 04-Dec-18 09:25 PM ah! Ok ^^U 04-Dec-18 09:25 PM The compsci teacher was awesome. 04-Dec-18 09:25 PM But not politically favoured 04-Dec-18 09:26 PM XD 04-Dec-18 09:26 PM So, I got to learn 68k asm 04-Dec-18 09:26 PM And low level hardware. 04-Dec-18 09:26 PM When others just played games. 04-Dec-18 09:27 PM Wooow 04-Dec-18 09:28 PM And as this was the early 90s, that seemed pretty cool 04-Dec-18 09:28 PM I remember spending ages trying to figure out how to scan a matrix keypad. 04-Dec-18 09:29 PM XD, I have never done that, I get bored before achieving that succesfully (I hate programming, I'm of the hardware type) 04-Dec-18 09:31 PM I never got it working well. Now I suspect it was just that the cpu was too fast and I didn't give enough time... 04-Dec-18 09:31 PM XD. So, how come you ended here? (that is, what amazing thing do you do?) 04-Dec-18 09:32 PM I don't think I do amazing things. I came because I wanted to find out what amazing things ppl here do. 04-Dec-18 09:32 PM I am more infosec and software in work. 04-Dec-18 09:32 PM I tinker with hardware. 04-Dec-18 09:33 PM That's good enough to do amazing things, nonetheless. 04-Dec-18 09:33 PM And just wanted to hang with ppl who would blow my mind with things I don't yet understand. 04-Dec-18 09:33 PM And maybe pick up enough knowledge to try some simple stuff 04-Dec-18 09:34 PM Welcome, I guess. I get lost 75% of the time. 04-Dec-18 09:34 PM XDDD 04-Dec-18 09:34 PM You'll pick up fast if you decide to get into it. 04-Dec-18 09:34 PM anything in particular interests you? 04-Dec-18 09:34 PM (that last phrase was very badly composed, sorry for that) 04-Dec-18 09:35 PM Hah, everything! 04-Dec-18 09:36 PM And that's a challenge, as I get excited by lots of stuff but have a short attention span 04-Dec-18 09:36 PM The short attention span can be fixed, believe me. 04-Dec-18 09:37 PM I tend to have loads of projects I wanna do, and few that get any love. 04-Dec-18 09:37 PM I never finished projects when I was younger, but one day something clicked into place. 04-Dec-18 09:38 PM How long did that take? 04-Dec-18 09:38 PM Hm...I'm 37 now. maybe when I was 30. 04-Dec-18 09:38 PM 30/32 04-Dec-18 09:39 PM Hmm, ok. I'm 45 now.. 04-Dec-18 09:39 PM Pretty young still. 04-Dec-18 09:39 PM It's a question of picking up one simple project, and finishing it up. 04-Dec-18 09:39 PM the feeling of finishing something gets addictive. 04-Dec-18 09:39 PM That has never worked with me alas, even when I have finished stuff. 04-Dec-18 09:40 PM Oh 04-Dec-18 09:40 PM But I do cycle around things so not everything gets abandoned 04-Dec-18 09:41 PM it's something, I guess. 04-Dec-18 09:41 PM ^^U 04-Dec-18 09:41 PM Yeah, still figuring myself out. 04-Dec-18 09:41 PM ^^/ 04-Dec-18 09:41 PM dammit 04-Dec-18 09:41 PM (it was a pom-pom cherleader, but * are special characters 04-Dec-18 09:43 PM Thnx 04-Dec-18 09:43 PM Just remember, if you have questions, everyone here can give answers. 04-Dec-18 09:43 PM looks at the clock Oh, Good morning! 04-Dec-18 09:44 PM Yup, morning all right here 04-Dec-18 09:45 PM (here it's 6:45 am) 04-Dec-18 09:45 PM Spain amirite? 04-Dec-18 09:46 PM Yeah, 04-Dec-18 09:46 PM and a snoring gf. 04-Dec-18 09:46 PM XDDDDDD 04-Dec-18 09:46 PM Heh 04-Dec-18 09:46 PM My wife is breathing quietly next to me. Trying not to wake her. 04-Dec-18 09:47 PM screams WAKE UP! HE IS TALKING SCIENCE IN A CHAT! WAKEEEE UPPPPPPPPPP 04-Dec-18 09:47 PM XD 04-Dec-18 09:48 PM (he, she, it, I don't know, sorry for infering) 04-Dec-18 09:48 PM He is just fine for me. 04-Dec-18 09:48 PM Ok! (Zhang sounded masculine to my spaniard head) 04-Dec-18 09:49 PM And to my English head too. 04-Dec-18 09:49 PM Although I would not be offended by she or they either. 04-Dec-18 09:50 PM Whatever you fancy from time to time. ^^ 04-Dec-18 09:51 PM At some point, I would like to attempt a simple dc excited co2 laser for fun, before trying an RF excited slab... 04-Dec-18 09:51 PM (maybe "at any given time" is a better construction, pardon my self corrections) 04-Dec-18 09:51 PM woooo 04-Dec-18 09:52 PM Time to time works fine for me too 04-Dec-18 09:52 PM But, I have plenty to learn first. 04-Dec-18 09:52 PM That should be doable with some JB weld, glass, HV supply and a cheap vacuum pump. 04-Dec-18 09:52 PM Yup 04-Dec-18 09:53 PM Never tried, I only know the basics, but I do encourage you to try. 04-Dec-18 09:53 PM Start simple and ride the success. 04-Dec-18 09:53 PM Not sure where to get the semi-transparent mirror, though. 04-Dec-18 09:54 PM Plenty of cheap Chinese stuff on eBay for that. 04-Dec-18 09:54 PM (probably aliexpress, in any case) 04-Dec-18 09:54 PM that too. 04-Dec-18 09:54 PM I am not expevtinf highly tunes. 04-Dec-18 09:54 PM tunes? 04-Dec-18 09:54 PM Or aliexpress ya 04-Dec-18 09:54 PM Tuned! 04-Dec-18 09:54 PM ah! 04-Dec-18 09:54 PM if it lases, it lases. 04-Dec-18 09:54 PM noone can argue against that. 04-Dec-18 09:55 PM Troo 04-Dec-18 09:56 PM I think I gave away my cheap laser power supply, if I didn't, I'll let you know. 04-Dec-18 09:56 PM Hey, no problems, they're not too ezpensive. 04-Dec-18 09:56 PM Although 20kV isn't something I want to build for yet. 04-Dec-18 09:57 PM (I still have unopened boxes from me moving with my gf a year ago, so go figure wat materials I have there) 04-Dec-18 09:57 PM Can't help in that range, I'm happy aroun 2KV. XDDD 04-Dec-18 09:58 PM Yeah, that's why I was thinking RF for the one after. 04-Dec-18 09:58 PM If I ever got there. 04-Dec-18 09:59 PM Not sure if we have an expert in lasers around here, but Aplied_Ion surely has knowledge about that somewhere. 04-Dec-18 09:59 PM You will get there if you stick around. 04-Dec-18 09:59 PM Just by peer pressure. 04-Dec-18 10:00 PM Thnx for the encouragement. 04-Dec-18 10:00 PM My pleasure ^^ 04-Dec-18 10:01 PM Heh, I find it hard to find like minded ppl where I live, so, I guess this stands in? 04-Dec-18 10:01 PM And, TBH I am heavily introverted, so I wouldn't find it easy anybow. 04-Dec-18 10:02 PM It does for me. New town, mostly peasants (saying that with the whole signiicance in mind) 04-Dec-18 10:02 PM Much easier typing. 04-Dec-18 10:02 PM WELCOME! shakes the hand vigorously 04-Dec-18 10:02 PM XDD 04-Dec-18 10:02 PM Heh 04-Dec-18 10:02 PM totally feel you. 04-Dec-18 10:02 PM Sometime join the voice chat if you can, it helps A LOT with introversion. 04-Dec-18 10:02 PM (and that comes from a person that on his first day in USA only ate three muffins because could not talk to anyone) 04-Dec-18 10:04 PM Yeah, it is making the time for it. Life doesn't make that easy for various reasons. 04-Dec-18 10:04 PM Oof 04-Dec-18 10:04 PM How was the second day? 04-Dec-18 10:04 PM Totally understand the difficulty of timing, but we are adressing that, so I'm sure we'll find a spot that works for you from time to time. 04-Dec-18 10:04 PM Better, I managed to talk to people in the evening of the first day, and was smoth afterwards. 04-Dec-18 10:05 PM At least being in the EU (for the moment?!) helps. 04-Dec-18 10:05 PM I am glad to hear it got better. 04-Dec-18 10:06 PM I managed to have fun, wich is something to say. 04-Dec-18 10:06 PM also ate better. 04-Dec-18 10:06 PM XDDDDD 04-Dec-18 10:06 PM Yeees! Fun makes it much easter. 04-Dec-18 10:07 PM Next time I get there, I'll do something to gather all the introverts in the supercon. 04-Dec-18 10:07 PM Stupid thing is I have done things some public speaking, but I find groups hard. Small numbers are less overwhelming 04-Dec-18 10:07 PM Yeah. 04-Dec-18 10:07 PM I divide them mentally into smaller groups 04-Dec-18 10:07 PM so I'm only technically speaking to a small bunch. 04-Dec-18 10:07 PM but if you have managed it, you are already doing much better than many others. 04-Dec-18 10:09 PM Some of it might have been bc I was trying to be helpful, not realising everyone else had taken a step back. 04-Dec-18 10:09 PM XDDD 04-Dec-18 10:09 PM So, not quite by choice. 04-Dec-18 10:10 PM Well, at least you did it, it's a small victory. 04-Dec-18 10:10 PM I survived, and I think there is still the video evidence on the Web somewhere. 04-Dec-18 10:10 PM introverts of the world, uni...huh... 04-Dec-18 10:11 PM Unite individually? 04-Dec-18 10:11 PM XDDD 04-Dec-18 10:11 PM Indiviunite 04-Dec-18 10:11 PM I like it. 04-Dec-18 11:37 PM ok, so, @Nixie it's all your fault I've just about finished off a tool for modding heightmaps and terrain masks in a game. 05-Dec-18 12:10 AM My fault??? That's programming, I'm sure I have nothing to do with that. Congrats! 05-Dec-18 12:10 AM Show something once finished, okay? (Like before and after images, or something representative). I would advise to post it in #general , as it is what you do. If someone complaints (doubt it), I'll deal with them. 05-Dec-18 12:23 AM hello 05-Dec-18 12:39 AM Morning, @N00N \o/ 05-Dec-18 12:57 AM Anyone here have any recommendations on good c++ content? 05-Dec-18 12:57 AM Like, online lectures or textbooks or w/e 05-Dec-18 12:57 AM All I want is that it not be graded b/c heck no 05-Dec-18 12:57 AM This is for work but I do not learn well when I work within a homework deadline environment 05-Dec-18 12:57 AM "then hedge how did you survive college???" I skipped every dang lecture I could and still didn't get a ton of homework in because my productivity comes in bursts and I learn best by doing projects 05-Dec-18 01:24 AM Alas, I don't think I can make suggestions there, although I really get the productivity coming in bursts. 05-Dec-18 03:58 AM *\o/* 05-Dec-18 03:58 AM \*\\o/\* 05-Dec-18 03:58 AM @Nixie You have to escape special characters with backslashes or set them in a code block. If you don't want them interpreted as markdown. 05-Dec-18 06:44 AM Fun! 05-Dec-18 06:57 AM Thanks! *\o/* 05-Dec-18 07:33 AM You're welcome! 05-Dec-18 02:31 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20181205_223928-E07EF.jpg 05-Dec-18 02:31 PM I'm so glad USB sticks are a thing... 05-Dec-18 02:31 PM it's great to finally measure the signal, not the performance of my scope 05-Dec-18 02:31 PM i can confirm rise and falltimes of scintillators now \o/ 05-Dec-18 02:31 PM also: wow, the ludlum 3 internal amp is fast 05-Dec-18 03:42 PM you can replace the disk drive in there tho, or get the pcmcia network card it supports 05-Dec-18 03:43 PM yeah, I'll do a lot of hacking to this scope 05-Dec-18 03:44 PM the only worthwhile hack imho is the increased memory depth, but then the thing is incredibly slow 05-Dec-18 03:44 PM increased memory isn't what I'm going for, but the 1 GHz upgrade 05-Dec-18 03:45 PM it's just a software option you can turn on 05-Dec-18 03:45 PM software and 2 caps on some traces for hardware limiting of the upper frequency 05-Dec-18 03:45 PM one should do a recal after desoldering, but that requires GPIB 05-Dec-18 03:46 PM yes, but the memory depth is just a software option 05-Dec-18 03:46 PM ah, yes 05-Dec-18 03:47 PM you can make it run stuff off the floppy 05-Dec-18 03:47 PM oh? 05-Dec-18 03:47 PM but using ethernet or gpib is more convenient 05-Dec-18 03:47 PM well, it supports java applications off the harddisk 05-Dec-18 03:47 PM but you can autostart stuff from the floppy 05-Dec-18 03:49 PM cool 05-Dec-18 03:49 PM looks up doom for the scope 05-Dec-18 03:49 PM guess I should read the manual some day 05-Dec-18 03:49 PM eh, I'll do so tomorrow, during maths g 05-Dec-18 03:49 PM good night 05-Dec-18 04:03 PM I got rid of mine, especially the fan got too annoying 05-Dec-18 04:57 PM the local junkery has a tek 7104 for sale (albeit not with very exciting modules) that i'm .. strongly considering 05-Dec-18 04:57 PM it is a beast of a thing and i can almost certainly get a cheaper GHz scope elsewhere, but it's a direct successor of the tek 519 nuclear-physics scope and the fastest general purpose analog oscilloscope ever made. apparently it will cooperate at up to 2 GHz with some loss of linearity, and a purported mod by Someone(tm) suggests that the weird microchannel crt in it can run way up at 3 GHz 05-Dec-18 04:57 PM 05-Dec-18 04:57 PM the temptation is substantial 05-Dec-18 05:24 PM they are pretty nice, but I would not pay much for them now 06-Dec-18 12:51 AM Though the 7104 can go very fast I'd only go with a fully digital scope nowadays 06-Dec-18 12:51 AM but that's just my opinion, I have some special use cases 06-Dec-18 12:58 AM hi 06-Dec-18 12:58 AM Moin! 06-Dec-18 01:00 AM Hihi 06-Dec-18 01:01 AM Hello! 06-Dec-18 01:03 AM you guys know kress-gmbh.de? they build so pretty stuff 06-Dec-18 01:03 AM if you want to build a "compact" ion implanter, such a RFQ (Radio Frequency Quadrupole) LINAC is the way to go, right? 06-Dec-18 01:07 AM what kind of energies do you need? 06-Dec-18 01:09 AM hum, <= 4MeV 06-Dec-18 01:09 AM i know, there is no "universal design" with high efficiency 06-Dec-18 01:10 AM oh 06-Dec-18 01:10 AM yeah, you're gonna need an RF linac for that 06-Dec-18 01:10 AM unless you've got some space, in which case you could do it electrostatically 06-Dec-18 01:10 AM and normally i should use E/u units ^^' 06-Dec-18 01:10 AM yeah, okay, but such compact RFQ are so beautiful 06-Dec-18 01:13 AM that's true 06-Dec-18 01:13 AM reminds me of: https://www.youtube.com/watch?v=oMgMNlgkqIY 06-Dec-18 01:14 AM of course, they are PITA to manufacture, i guess 06-Dec-18 01:14 AM but when it comes to accelerator stuff you should go and ask Adam, he knows way more about it 06-Dec-18 01:14 AM otherwise it wouldn't be any fun ^^ 06-Dec-18 01:15 AM ask adam with jefferson airplane "white rabbit" in the background 06-Dec-18 01:16 AM hey @AdamMcCombs i have a question https://www.youtube.com/watch?v=HWxMj6IQbJc 06-Dec-18 01:35 AM So, question 06-Dec-18 01:35 AM How has Ajit Pai /not/ been indicted for ethics violations 06-Dec-18 01:35 AM He's literally a Verizon lawyer making policy for Verizon 06-Dec-18 04:54 AM the machining/assembly of the chambers is suprisingly simple 06-Dec-18 07:43 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/image0-979CD.jpg 06-Dec-18 07:43 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/image0-A43B1.jpg 06-Dec-18 07:43 AM Verified that the 3He tube detects Gammas 06-Dec-18 07:43 AM you're starting to get peaks! 06-Dec-18 07:43 AM Hats from a bright Co57 source 06-Dec-18 07:43 AM oh 06-Dec-18 07:43 AM Yup! 06-Dec-18 07:43 AM Not neutrons but136kev gammas I think 06-Dec-18 07:43 AM Hard to distinguish from noise, though it gives me an idea of where to start 06-Dec-18 07:44 AM what's the difference in aquisition between the two pictures? 06-Dec-18 07:44 AM the peak on the second one confuses me 06-Dec-18 07:45 AM One is noise the other is with tube beside Co57 source 06-Dec-18 07:45 AM ah, ok 06-Dec-18 07:45 AM See the Co57 peaks aren’t very distinct from the noise 06-Dec-18 07:46 AM which is how they're supposed to be 06-Dec-18 07:46 AM Because they’re gammas yeah? 06-Dec-18 07:46 AM yep 06-Dec-18 07:47 AM Spent a long time checking with a weaker Co57 source until we realized the thick tube wall and noise was probably making detection impossible 06-Dec-18 07:47 AM Didn’t realize I was in off-topic, meant to be in General 06-Dec-18 10:40 AM @N00N unfortunately rf accelerators are extremely complex, and machining tolerances are absolutely crazy. The simulations that go into these devices are also extremely complex and demanding. Not to mention for assembly UHV compatible hydrogen brazing is required. The RFQ stuff is definitely more compact, and do look awesome, but any MeV RF accelerator is millions in investment. The power system and matching itself is a whole beast. Between cooling, rf, power, etc, the infrastructure needs are massive, especially since rf is not efficient. 4MeV is still low for accelerators, but it's not feasible on the cheap with rf, or electrostatic for that matter. MeV electrostatic systems are huge, and require the system to be in a full tank of pressurized gas. Engineering to get appreciable current becomes a huge challenge, and is way more involved than just building your average VDG generator or CW multiplier. A couple of years ago I had the privelage of sitting in on and participating in design reviews for a new accelerator at SLAC with some of the top engineers in the field. That was one of the most inspiring moments in my career, as the level of engineering in these systems is just unreal, at a whole new level. It really put me in my place in terms of just how much more there is to learn in this field of engineering. That experience is in part what drives my efforts in fully engineering the systems I a working on now. I will say that an MeV capable RF accelerator is just not feasible on your own unless you have prodigious amounts of money, and are an expert in the field of RF acceleration. 06-Dec-18 10:50 AM Now, all of that being said, give me some months to finalize the details of the MEVI experiment (if everything stays on schedule and proceeds smoothly), you will be very interested in the prospects... 06-Dec-18 11:13 AM sounds interesting, yeah, keep us informed 06-Dec-18 11:13 AM (what is the MEVI experiment?) 06-Dec-18 11:13 AM and y is brazing necessary? 06-Dec-18 11:15 AM abbreviated from EXEDA-MEVI, in which my EXEDA system will be configured for a different mode of operation 06-Dec-18 11:15 AM ah ok 06-Dec-18 11:16 AM Sorry it's vague lol, I will release what it stands for when the project is ready to go public 06-Dec-18 11:16 AM And brazing is standard for these types of systems. You have all of these copper components that need to be assembled as a large unit in a highly precise manner. For assemby, usually thin sheets of brazing material is placed between each cell, and the assembly is fixtures and goes into a brazing furnace 06-Dec-18 11:16 AM Hydrogen and vacuum brazing are also very clean processes 06-Dec-18 11:16 AM The cleanliness is crucial for minimizing contamination of the structures 06-Dec-18 11:19 AM yeah, but those kress guys electro-plate the copper on the stainless structure 06-Dec-18 11:19 AM right? 06-Dec-18 11:19 AM don't want to say that that is easy, but that's what they do 06-Dec-18 11:23 AM These structures are unique and different from conventional rf systems. It looks like a lot is machined from solid pieces, and some assemblies have gasket based lids. It does look like for some of the copper cell structures they are probably brazed though 06-Dec-18 11:23 AM some of their machines are "simply" machines from copper 06-Dec-18 11:23 AM Assembly is probably easier, but machining and design is still going to be brutal 06-Dec-18 11:23 AM Very cool stuff though 06-Dec-18 11:23 AM You are right that some structures are single block machined 06-Dec-18 11:23 AM Though designs are propriety, and probably makes the NRE costs really high in return 06-Dec-18 11:25 AM yeah ok, you need good machines and much skills in using them, but with modern CNC machines it's not totally magic, right? 06-Dec-18 11:27 AM It's not, but you can't just go to any machine shop. There are limited places that really specialize in machining these types of systems. It's also much more than just machining. It is an understanding of precision RF engineering. Most of the time, the places that machine these either design accelerators themselves or work mostly with designers in the field 06-Dec-18 11:29 AM but that knowledge would be shareable, since with modern machining and metrology it's reproducible? 06-Dec-18 11:29 AM Other factors include uhv compatible machining practices, thermal and rf tolerancing 06-Dec-18 11:29 AM since they write about 10 micrometer precision 06-Dec-18 11:29 AM and that's very common nowadays 06-Dec-18 11:31 AM Technically, but it's a whole bunch of factors. Just the tolerances alone is not enough, it takes a lot of experience with a wide range of disciplines 06-Dec-18 11:31 AM i mean, you could buy one of their accelerators and "reverse engineer" (3D scan) them and make copies on your CNC machines 06-Dec-18 11:31 AM there is nothing special they can hide 06-Dec-18 11:31 AM or am i wrong? it's simply geometry 06-Dec-18 11:31 AM and the materials used are standard stuff 06-Dec-18 11:34 AM It's not just geometry. The manufacturing process is just as important. Again, going back to things like rf tolerancing as well as uhv machining and cleanliness. Also having a cavity design does not tell you about how to operate it. There are reasons why the tech is proprietary, lots of highly specialized and niche design work involved. It's kind of hard to explain, sorry if it still doesn't sound convincing. In theory yes, you could scan a structure and replicate it, but that is only 1 tiny aspect of a massively complex process to get it assembled and working correctly. 06-Dec-18 11:35 AM i may not be able to derive my own design flavours because of the lack of knowledge, but copying is a pure machinists job? 06-Dec-18 11:35 AM hum, okay, you're talking about the knowledge needed for running such a rig, yeah, maybe 06-Dec-18 11:35 AM do the same for the electronics \o/ 06-Dec-18 11:35 AM (but it's simply RF stuff in that case) 06-Dec-18 11:37 AM I can tell you from first hand experience it's not that easy to replicate. Our facility has gone out to bid for manufacturing of our new accelerator, and even some places that make accelerators back off and say no, this is too complex/risky . Even instrumentation like BPMs has been very difficult to find someone to fabricate. 06-Dec-18 11:37 AM If accelerator facilities could go to common machine shops for this, they would to reduce cost. But it's just too complex and specialized for most places. Even with proper machining tools, it still takes experience 06-Dec-18 11:39 AM i mean, someone could start kinda "open hardware accelerator movement" 06-Dec-18 11:39 AM That's literally what I'm doing lol 06-Dec-18 11:39 AM so that not one person have to (reverse) engineer everything 06-Dec-18 11:39 AM At least for 1 super niche type anyway 06-Dec-18 11:39 AM ah, ok, cool! 06-Dec-18 11:40 AM I can tell you it's not RF though. Just too difficult to design and manufacture without a whole engineering team and some real sophisticated software 06-Dec-18 11:40 AM Actually, accelerators are technically "open hardware", but you kind of have to be involved in the field to really get access 06-Dec-18 11:40 AM Open hardware within its community lol 06-Dec-18 11:41 AM ok, that's what you normally would call proprietary? 06-Dec-18 11:41 AM if it's not "open" in access, it's not open in the way i mean 06-Dec-18 11:41 AM i don't mean "well documented" 06-Dec-18 11:41 AM only accessible 06-Dec-18 11:43 AM There are a lot of proprietary things, but general info is mostly available. It's weird, I was talking to a SLAC engineer about this. In their minds, accelerators are already "open source". It's a bit different of a definition inside and outside of the field lol 06-Dec-18 11:43 AM But the exact design, specs, manufacturing, etc yeah, that's usually proprietary 06-Dec-18 11:43 AM But I agree with you on access lol, that's why I am taking on my big project. I think it may be the first truly maker-oriented open source accelerator build out there, for an accelerator that could be used for legit physics research at least. It is still very unconventional, and doesn't look all that exciting compared to the big RF systems or fancy laser ones, but it's got interesting perks and applications. The main part isn't usually used as an accelerator itself, but can be it's own standalone accelerator depending on the application. We are also not talking crazy long beams either. Very short beams for most applications, maybe inches to a foot at most (though there are some interesting beam transport experiments I want to run that it could propogation several meters). 06-Dec-18 11:43 AM Technically, 2 flavors. EXEDA is standalone of one type, while the MEVI configuration uses it to drive a different type of accelerator output 06-Dec-18 12:17 PM On the subject of reproducibility, while a lot of things are complex and very difficult, a lot are also definitely do able to reverse engineer and build yourself way cheaper than can be bought or manufafactured. Especially instrumentation. You can reverse engineer a lot of systems collecting enough papers/old books, especially in the accelerator world. I won't say that rf cavities are impossible on your own. Some are state of the art and just absurd, but not all are. The first RF accelerators using the Wideroe structures or Alvarez structures are quite simple fundamentally. Getting MeV levels remains a technical challenge still, but there are definitely structures that could be designed and machined yourself. I would even say that some of the more complex structures can be reduced to simpler, less ideal equivalencies. 06-Dec-18 12:17 PM I would be very interested to see if it was possible to make such simple early repeating RF accelerators using conflat crosses to support the periodic structures with standard/diy feedthroughs, and making a long enough beam line for a classical old school linac. 06-Dec-18 12:17 PM In this sense, a low cost, long Alvarez accelerator may be quite feasible to accomplish at a relatively low cost 06-Dec-18 12:17 PM Or Wideroe style using compression fittings with glass 06-Dec-18 12:22 PM I'm amazed by how on-topic your off-tpoic conversations are 06-Dec-18 12:24 PM Yeah, kind of got carried away on this one. Saw a discussion on accelerators here and kind of ran away with it lol 06-Dec-18 12:24 PM But I do believe accelerator tech can be more accessible to makers. It won't be cheap, still a several thousand dollar hobby, but it sure beats millions lol 06-Dec-18 12:24 PM Just need more makers to work on it and innovate upon it 06-Dec-18 12:24 PM I think I will look more into a low cost long length Wideroe/Alvarez system with standard conflat stuff, dig into the feasibility of a more conventional linac for the maker realm 06-Dec-18 12:24 PM Maybe I should move this to on-topic/general discussion lol 06-Dec-18 12:42 PM here is a great pdf I found from CERN that has fatastic overview of all the major types of accelerator cavities: 06-Dec-18 12:42 PM Actually, I will load this to the resources section 06-Dec-18 12:42 PM At the end there is a section on RFQ accelerator structures 06-Dec-18 12:42 PM it does look like the most basic and simple structure may be possible to DIY - I think its something worth exploreing 06-Dec-18 12:42 PM @N00N you may be interested in taking a look 06-Dec-18 12:42 PM Like I said, while these specialized proprietary systems from these companies may be too complex to reproduce, the systems can be boiled down to more simplified, fundamental principles, that could be done through a DIY effort. They will probably work lousy in comparison, but may have a chance at being do-able with much less money and resources 06-Dec-18 01:05 PM Hey, you could switch to #general 06-Dec-18 01:05 PM /hint hint/ 06-Dec-18 01:08 PM might be a bit to late for that 06-Dec-18 01:11 PM Yeah... 06-Dec-18 02:35 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20181101_113523-9171B.jpg 06-Dec-18 02:38 PM I remember the plot of doctor strange to be different... 06-Dec-18 03:53 PM I don't think the machining processes are actually that special, it's just that a lot of people think they are 06-Dec-18 04:50 PM There are some special considerations for machining UHV stuff 06-Dec-18 04:50 PM Mainly minimizing contamination 06-Dec-18 04:50 PM Particularly for acceletators 06-Dec-18 04:50 PM avoiding virtual leaks through particular welding techniques, too 06-Dec-18 04:50 PM i hear a lot about vacuum welding being very demanding 06-Dec-18 04:51 PM Exactly, it's a very involved science 06-Dec-18 04:51 PM Vacuum welding defintely tougher 06-Dec-18 04:51 PM even just machining knife edges in conflat is apparently really annoying because of the precision and angles needed to form a good knife edge 06-Dec-18 04:51 PM orthogonally related, i have a bunch of PMTs now 06-Dec-18 04:52 PM The brazing process is also highly engineered, looking at spread, voids, inclusions. The papers on knife edge engineering are really cool, looking at the developed stresses 06-Dec-18 04:53 PM i gotta congeal a low-noise power supply together, and then maybe try my luck with ebay NaI(Tl) crystals.. 06-Dec-18 04:53 PM (though it is tempting to just get a bunch of different scintillator materials and try them all, tbch) 06-Dec-18 04:53 PM ((a gamma spectacular would completely obviate the need for the former thing, now that i think about it...)) 06-Dec-18 04:58 PM contamination has never been a huge issue for me, most of the stuff goes away when you clean the hardware 06-Dec-18 04:58 PM welding vacuum chambers is just like any other fusion tig weld, the challenge is in the engineering and access to some locations 06-Dec-18 04:58 PM actually doing it isn't so hard 06-Dec-18 05:03 PM What type of systems do you work on or machine? 06-Dec-18 05:03 PM MBE 06-Dec-18 05:03 PM and an implanter and the various junk that comes with that stuff 06-Dec-18 05:04 PM Nice! Do you actually do the machining of them? 06-Dec-18 05:04 PM yes, as you cannot get parts anymore 06-Dec-18 05:04 PM What vacuum levels usually? 06-Dec-18 05:05 PM the baseline is at 10^-11mbar usually 06-Dec-18 05:05 PM but that is highly dependant on which process was running before and how good the bakeout was 06-Dec-18 05:07 PM Accelerators are a bit tricky from the standpoint that they are so long with so many surfaces and cells, that contamination adds up. They also run at very high power levels, and conditioning under rf is usually demanding 06-Dec-18 05:07 PM yes, I understand the difficulties but it is not magic 06-Dec-18 05:07 PM some of the processes require a manipulator at >1000°C in the chamber 06-Dec-18 05:07 PM which is quite annoying because it wears out stuff all the time 06-Dec-18 05:11 PM No its not magic, just a lot of engineering design work. Seeing the process first hand though, some of the specs and manufacturing requirements are pretty challenging and tight. However, it depends on the system. Small machines for industrial applications are probably less demanding than research grade devices. Yeah, I can definitely imagine 1000C would be a real challenge 06-Dec-18 05:11 PM Though I guess the plus side to such high temperatures is it bakes the system very well for UHV 06-Dec-18 05:15 PM no, the bakeout is not really influenced by it 06-Dec-18 05:15 PM you cannot turn it on without filling the LN2 cavity around the chamber 06-Dec-18 05:17 PM I think the other reason why accelerator specs are so careful and over the top is that being multi million dollar systems, it is crucial for it to work, so better too much than too little. Unfortunately it has the side effect of adding lots of cost as well 06-Dec-18 05:17 PM we usually bake the systems to 200°C and then see what is up, turning the manipulator on helps some but not really 06-Dec-18 05:17 PM yeah, that is what I mean, it is a lot of ass covering 06-Dec-18 05:17 PM because nobody wants it not to work first shot 06-Dec-18 05:18 PM I'm not familiar with MBE, definitely should check it out more now 06-Dec-18 05:18 PM Yeah, honestly the specs can be relaxed in many cases 06-Dec-18 05:18 PM well, it is pretty low tech stuff tbh 06-Dec-18 05:18 PM you fire an ebeam into your material and deposit it onto something you want it on 06-Dec-18 05:18 PM there is a bit of thought involved with the chamber geometry so that the beams converge into one point but apart from that there is not a lot going on 06-Dec-18 05:19 PM What beam voltage and currents are typical for these devices? 06-Dec-18 05:20 PM around 10kV at up to 2A 06-Dec-18 05:22 PM Oh nice, nothing too crazy. That just a thermionic gun? The vacuum is much higher than our accelerator for sure, we run around 10^-7 or so. Is the vacuum kept thst high for deposition purity? 06-Dec-18 05:22 PM I'm also interested in low vacuum ebeams. For my small system I want to explore hollow plasma cathode ebeams, which can work in vacuum as poor as 10^-2. Supposedly good for high current, relatively high pressure ebeam welding 06-Dec-18 05:24 PM yes, it is a very simple emitter + beamforming thing 06-Dec-18 05:24 PM yeah you can run those guns at very high pressures 06-Dec-18 05:24 PM but they will not last 06-Dec-18 05:24 PM yes, the vacuum is kept high to keep contamination low 06-Dec-18 05:24 PM but during deposition it is between 10^-9 or -7 06-Dec-18 05:24 PM depending on the material and the rate 06-Dec-18 05:24 PM on the newer systems it is better but they basically are made out of pumps 06-Dec-18 05:29 PM Hollow cathode plasma ebeam sources are pretty robust given the very high continuous currents, for my purposes I'm not worried about time. Up to 10kA per cm^2 current densities, some fun stuff to explore. Makes sense on the MBE stuff. 06-Dec-18 05:29 PM Working with ebeams, you may appreciate some of the super specialized niche stuff. There is a particular gun I have come across that works at atmosphere, but requires intense subnanosecond pulses, on the order of tens to hundreds of pS FWHM at 100s of kV. Works with runaway electron emission 06-Dec-18 05:33 PM I think I read about that 06-Dec-18 05:33 PM Pioneered by G.A. Mesyats, a prominent researcher in pulsed power and beam systems 06-Dec-18 05:33 PM You may like the system I'm working on at home. 06-Dec-18 05:33 PM If I get it working to peak performance, I'm expecting peak beam power in the 100s of MW range 06-Dec-18 09:09 PM Why do people insist on pronouncing Huawei like "wah way" 06-Dec-18 09:09 PM I know this is a stupid hill to die on but it's pissing me off so much 06-Dec-18 09:09 PM It's not correct in any language 06-Dec-18 09:55 PM And how did Ericsson screw up so big time with an expired cert somewhere between SGSN and MME? 06-Dec-18 09:55 PM And yes, I forget most of what I knew between SGSN and GGSN on cellular phone networks. 06-Dec-18 10:45 PM i learn everything by reading and don't often know how to pronounce many things correctly 06-Dec-18 10:45 PM Is there any kind of surface finish treatment for UHV pieces just after machining? 06-Dec-18 10:45 PM XD 06-Dec-18 10:47 PM i feel like i've heard good things about electropolishing 06-Dec-18 10:47 PM @hedgeberg how is it pronounced then? 06-Dec-18 10:47 PM Not that I'm going to get into UHV, but curious. 06-Dec-18 10:50 PM Huawei, or 华为 in simplified Mandarin (pinyin huá wéi) requires 4 syllables to pronounce 06-Dec-18 10:50 PM *phonemea 06-Dec-18 10:50 PM 2 syllables, 4 phonemes 06-Dec-18 10:50 PM So, mostly how spaniards pronounce it. XD 06-Dec-18 10:51 PM The first phoneme is the soft gutteral h sound, like huh or hoo 06-Dec-18 10:51 PM The phonemic breakdown would be like "hoo-wah woo-ay" 06-Dec-18 10:51 PM So, said quickly, "hwah way" 06-Dec-18 10:51 PM Would be close enough 06-Dec-18 10:51 PM 06-Dec-18 10:52 PM Oops 06-Dec-18 10:52 PM Bahahaha 06-Dec-18 10:52 PM Not this "wah way" bullpucky 06-Dec-18 10:52 PM Don't worry 06-Dec-18 10:52 PM Mods are asleep. 06-Dec-18 10:52 PM Not quite how Spaniards pronounce it, fwiw 06-Dec-18 10:52 PM () 06-Dec-18 10:53 PM The h is close to the tongue motion for a rolled r, but towards the back of the throat 06-Dec-18 10:53 PM But, even if that weren't the case 06-Dec-18 10:53 PM Huh-wah way would be closer 06-Dec-18 10:53 PM Oh. 06-Dec-18 10:54 PM And I get that white people have a hard time with Mandarin syllables, but like, it's one of the first I learned 06-Dec-18 10:54 PM Well, I don't claim to know chinese. ^^U 06-Dec-18 10:54 PM XDDDad 06-Dec-18 10:54 PM **Mandarin, there's no single Chinese language 06-Dec-18 10:54 PM Mandarin is the ""official"" Chinese language, but as much as 10% of the population may not speak it 06-Dec-18 10:54 PM And for as much as 50% it's not their primary language 06-Dec-18 10:55 PM Will remember that. :P 06-Dec-18 10:56 PM I mean everyone calls it Chinese, it's just something I try to tell people since China is a really complex place 06-Dec-18 10:56 PM And it's worth remembering that almost the entire common perception of China is based on how the CCP wants China to be perceived because it enhances their global power. China's geopolitical positioning is...weird. 06-Dec-18 10:56 PM And that's one of the things they do 06-Dec-18 10:57 PM I have a friend that usually explains things of china, he travels there a lot. 06-Dec-18 10:57 PM They call Mandarin "Chinese" because it helps improve the image that China is a unified cohesive singular mass, and it's really not 06-Dec-18 10:57 PM XD 06-Dec-18 10:58 PM There's as many as 7 different major languages and 50 different dialects spoken 06-Dec-18 10:58 PM Sort of knew that. If they where unified they would dominate the world by now. 06-Dec-18 10:58 PM (or so he says) 06-Dec-18 10:59 PM Oh absolutely not, China is a very young global power, and their influence is capped pretty significantly as such 06-Dec-18 10:59 PM It's really complicated, if we want to get into Chinese geopolitics we can but it's messy, it's weird, and it requires a really strong understanding of global history going at least back to 1800 06-Dec-18 10:59 PM Ideally tho it's better to go back to 1300 06-Dec-18 10:59 PM The long story short is that China has always been an extremely perception-aware country. The Chinese dynasties avoided large wars by 1. Making themselves seem large, intimidating, and un-phaseable and 2. Making themselves a global trade crossroads 06-Dec-18 10:59 PM So, everyone was both scared and dependent 06-Dec-18 11:02 PM We better don't, at least for me, I useless at politics. 06-Dec-18 11:02 PM Yeah, that bit I said summarizes it well enough if you want the extremely short version 06-Dec-18 11:03 PM Thanks ^^ 06-Dec-18 11:03 PM Interesting to know, though. 06-Dec-18 11:03 PM We'll see in 20 years. And also, the commercial war with USA 06-Dec-18 11:10 PM Oh, the "trade war"? 06-Dec-18 11:10 PM That's just trump pretending to have influence because he wants a fight. It will end as soon as he's out of office. 06-Dec-18 11:10 PM China and the US are mutually dependent economically now and everyone knows it 06-Dec-18 11:11 PM XD 06-Dec-18 11:11 PM Except trump, it seems 06-Dec-18 11:12 PM All this does is hurts both of us, and it will be killed as soon as someone who isn't a waking nightmare in human form is in office 06-Dec-18 11:12 PM No, trump and his chief economic advisor are the only 2 people who think this way, and his economic advisor has said his job is to "justify Trump's instincts" 06-Dec-18 11:12 PM Which is just nonsense 06-Dec-18 11:12 PM In the economics world, noone agrees with his advisor 06-Dec-18 11:12 PM Literally noone would back him up when appointed 06-Dec-18 11:20 PM And still got hid way into presidency. (Can't say much, in spain we had our own srupid head of state) 06-Dec-18 11:26 PM I thought that was how politics worked? 06-Dec-18 11:26 PM But amin any case, that's not china, wich was the main off-topic. 06-Dec-18 11:26 PM XD 06-Dec-18 11:27 PM Brexit... 06-Dec-18 11:27 PM Stupis 06-Dec-18 11:27 PM Politics don't "work". 06-Dec-18 11:27 PM Oh yeah 06-Dec-18 11:27 PM Politics atupjs 06-Dec-18 11:27 PM Stupid... 06-Dec-18 11:27 PM Gotta play the game sometimes, but I hate it. 06-Dec-18 11:30 PM I am curious about the whole brexit-gibraltar thing. 06-Dec-18 11:32 PM I mean, yeah, politics is stupid, but it's also inescapable 06-Dec-18 11:32 PM Australia 06-Dec-18 11:33 PM What you have to realize is that politics isnt just something that has to do with elections or anything else, it's about how groups of humans self-manage and interact 06-Dec-18 11:33 PM It's part psychology, part sociology, part linguistics, etc 06-Dec-18 11:33 PM It's a huge complicated and nefarious subject, and to really understand it you have to care about it a lot 06-Dec-18 11:33 PM And idk, I guess I feel like nowadays none of us can afford to not understand it 06-Dec-18 11:34 PM Morning! (just namedropping things to give everyone headaches) 06-Dec-18 11:34 PM Yeah Australia stuff is wild 06-Dec-18 11:34 PM I'm thinking all open source devs from Australia need to divest themselves if they manage any projects 06-Dec-18 11:34 PM I'm curious if they'll require apple to pull signal/telegram from the app store? Because they won't comply, there's no space in their algorithm for mitming aes keys 06-Dec-18 11:34 PM Meaning that a court, if it plans to force compliance, will need to rule that the government can force a software developer to break the rules of math, which at the very least in the US would definitely fall under "imposing an undue or unreasonable burden" 06-Dec-18 11:38 PM Wasn't part of the (aussie) law that they can't compromise regular security in complying with it? Making the law itself a contradiction? 06-Dec-18 11:38 PM Yeah they want a secret backdoor that somehow gets activated at link time? 06-Dec-18 11:38 PM Which isn't how any of this works 06-Dec-18 11:38 PM Like, at all 06-Dec-18 11:38 PM They want to have the ability to require devs to introduce backdoors into encryption algorithms 06-Dec-18 11:38 PM Which is just 06-Dec-18 11:38 PM No 06-Dec-18 11:38 PM It's not how anything works 06-Dec-18 11:45 PM I can't find the text anywhere... I was just wondering if there's a loophole when you make a product that is just encryption and not "meant to" communicate via anything and you layer that over a compromised service 06-Dec-18 11:45 PM I just can't keep myself interested in politics whatsoever. I can "only care" about science/knowledge/skill acquisition. I do, however, surround myself with politics oriented trusted people, so I sort of know what NOT to vote. 06-Dec-18 11:45 PM Also, morning \o/ 06-Dec-18 11:54 PM https://www.aph.gov.au/Parliamentary_Business/Bills_Legislation/Bills_Search_Results/Result?bId=r6195 06-Dec-18 11:54 PM Damn, one becomes a designated comminications provider already by "the provision by the person of a service that facilitates, or is ancillary or incidental to, the provision of an electronic service that has one or more end-users in Australia" 06-Dec-18 11:54 PM Seems like they covered their bases 07-Dec-18 01:02 AM Good morning! 07-Dec-18 01:02 AM yay 07-Dec-18 01:12 AM All because flips through newspapers "terrorism" which killed ... four Australians in 2018. With knives. And they could have communicated via WhatsApp. So clearly we must pry rights for private communication from all citizens. 07-Dec-18 01:53 AM hi 07-Dec-18 01:53 AM hello! 07-Dec-18 01:54 AM @Applied_Ion the pdf on #resources right? 07-Dec-18 01:54 AM @GigaSquirrel \o/ 07-Dec-18 01:56 AM Yeah, the paper is in #resources 07-Dec-18 01:58 AM oki 07-Dec-18 01:58 AM have to clean up my 'office' 07-Dec-18 02:04 AM let's be honest, I think we all should 07-Dec-18 02:04 AM I need to rearrange my shelf of instruments, the new scope is bigger than expected 07-Dec-18 02:04 AM too bad the size is not mentioned in the datasheet and can be looked up easily mumble 07-Dec-18 02:09 AM yeah 07-Dec-18 02:15 AM @Leona it's been a talking point of world powers for years that "going dark" is the "single biggest threat to national security" 07-Dec-18 02:15 AM And I find it frustrating because, and I need to be very careful here, I believe that people should be able to break the law 07-Dec-18 02:15 AM I don't believe they should be able to do so without being culpable for what they do, obviously 07-Dec-18 02:17 AM But thats literally what a makes totalitarian regime. Why do they want that? 07-Dec-18 02:17 AM But, if an educated citizen who knows the law but also knows that said law is ethically abhorrent, chooses to violate the law, then that is their right 07-Dec-18 02:17 AM No government should have the right to prevent all crime 07-Dec-18 02:17 AM To apprehend, sure. To punish? Arguable, leaning towards less of it. But to prevent? 07-Dec-18 02:17 AM Any solution that allows the total prevention of any crime is one that robs someone of their fundamental human right to self determination 07-Dec-18 02:17 AM Point being, that these government's are so hell-bent on dissolving the right to digital privacy is kinda terrifying 07-Dec-18 02:17 AM Oops 07-Dec-18 02:17 AM Am I still here or did I get banned 07-Dec-18 02:17 AM I think I'm still here? But I can't delete the offending message? 07-Dec-18 02:17 AM Can anyone else still see it? 07-Dec-18 02:22 AM don't worry, the bot can't ban people unless we tell it to 07-Dec-18 02:22 AM it'll just delete the message, no further repercussions 07-Dec-18 02:22 AM Yeah, we had an autoban on our switch hacking discord's bot for certain behaviors 07-Dec-18 02:22 AM Namely slurs, b/c we had a real problem w/ edgelords, so I was worried there for a moment 07-Dec-18 02:23 AM yeah, nothing like that here 07-Dec-18 02:23 AM Anyway, the message that I sent, edited: 07-Dec-18 02:23 AM And I'm glad that we didn't bend to this (particular thing) in courts in the US. Problem is, now that it's done in Australia? Everyone and their dog will follow suit. 07-Dec-18 02:23 AM And, if it can be done in Australia, everyone will ask Australia to just do it for them to get around the issue 07-Dec-18 02:23 AM I am very upset about it is my point, and I don't even live in Australia 07-Dec-18 02:23 AM Anyway sorry @Leona I kinda went off and now I'm realizing I might have interrupted >.< 07-Dec-18 02:43 AM No, you're good 07-Dec-18 03:11 AM You pretty much brought up the things I thought but couldn't verbalize 07-Dec-18 03:52 AM has anyone here ever used the tek live chat support? 07-Dec-18 03:52 AM "Service personnel will be with you shortly. Estimated waiting time is 3 Minute(s)" 07-Dec-18 03:52 AM that was 45 minutes ago 07-Dec-18 04:02 AM hooray, I got one 07-Dec-18 04:32 AM you got one what? 07-Dec-18 04:33 AM service guy from tek 07-Dec-18 04:33 AM who told me he'll get me into contact with a technician and that they'll get into contact with me in the next 24h 07-Dec-18 04:35 AM good enough? 07-Dec-18 04:35 AM I guess 07-Dec-18 04:35 AM (god, I miss being able to correct my misspellings in twitter) 07-Dec-18 04:36 AM I just wanted information about the difference between 4 models, that should not be too hard... 07-Dec-18 04:36 AM (There is no shame in deleting and redoing a tweet) 07-Dec-18 04:38 AM (but I like editing) 07-Dec-18 04:38 AM "That shold not be too hard..." Famous last words of any rpg 07-Dec-18 04:40 AM I think the absence of the function just avoiding a whole bunch of issues related to people retweeting something. And a malevolent agent still having the ability to edit it. 07-Dec-18 04:40 AM (btw, @Leona have you written to the knobs manufacturer?) 07-Dec-18 04:40 AM highly probable. 07-Dec-18 04:40 AM Nah. I'll either do it later or send you an address... 07-Dec-18 04:42 AM XDDDDD 07-Dec-18 04:42 AM No scope should go unrepaired. 07-Dec-18 04:42 AM thingsrepairman annoys someone again 07-Dec-18 05:23 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/Screenshot_2018-11-23-22-14-05-51AED.png 07-Dec-18 05:23 AM There 07-Dec-18 07:37 AM i hope that i find the time this WE for gluing 16 bit ADC/DAC on my old SEM 07-Dec-18 08:53 AM Gluing??? 07-Dec-18 08:53 AM (explain in #general ) 07-Dec-18 11:49 AM Uh 07-Dec-18 11:49 AM My day has been made 07-Dec-18 11:49 AM https://www.washingtonpost.com/amphtml/nation/2018/12/07/make-better-choices-endangered-hawaiian-monk-seals-keep-getting-eels-stuck-up-their-noses-scientists-want-them-stop/?__twitter_impression=true 07-Dec-18 12:53 PM Omg... 07-Dec-18 02:13 PM Rip 07-Dec-18 04:56 PM Discord is having some major problems today. So if a message you sent doesn't get a reaction, that's the reason. 07-Dec-18 11:28 PM real lab hours 07-Dec-18 11:28 PM who up 07-Dec-18 11:45 PM Evenin - how's the jitters? 08-Dec-18 12:25 AM real "forgot how bright sirius is" hours 08-Dec-18 12:54 AM Morning! 08-Dec-18 03:31 AM "morning" folks 08-Dec-18 03:31 AM Did my PSA actually get received, or was discord failing then too? 08-Dec-18 03:34 AM @Leona I did see it. 08-Dec-18 10:09 AM @GigaSquirrel https://www.youtube.com/watch?v=R7jpe8DLV88 08-Dec-18 10:09 AM https://i.imgur.com/ZCHxUJr.jpg 08-Dec-18 10:14 AM ROFL! I had never seen that one. 08-Dec-18 10:31 AM :D 08-Dec-18 11:01 AM Tig welder and plasma cutter. Did pay some extra for the plasma to match the tig. XD 08-Dec-18 11:01 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/JPEG_20181208_200035-B405D.jpg 08-Dec-18 11:01 AM Small cnc, everything ballscrew. 08-Dec-18 11:01 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/JPEG_20181208_200121-0C8AD.jpg 08-Dec-18 11:01 AM Mill. 08-Dec-18 11:01 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/JPEG_20181208_200151-AB3CF.jpg 08-Dec-18 11:01 AM Lathe. 08-Dec-18 11:01 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/JPEG_20181208_200216-FC8A1.jpg 08-Dec-18 11:01 AM Heavily modded K40 laser cutter. 08-Dec-18 11:01 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/JPEG_20181208_200244-DEC87.jpg 08-Dec-18 11:03 AM oh my 08-Dec-18 11:03 AM that's very nice! 08-Dec-18 11:04 AM Wow, so many toys!!! You can make a ton with all that tooling! 08-Dec-18 11:06 AM and don't forget the printer! 08-Dec-18 11:07 AM oh, yes, but the table is a mess and I don't want to hurt sensible eyes. 08-Dec-18 11:07 AM XDDDD 08-Dec-18 11:07 AM looks around my room Eh, I've seen worse 08-Dec-18 11:07 AM Yeah, shame not ALL I would like (Ion's endplates shame) 08-Dec-18 11:07 AM but for medium/small things, I'm pretty much set. 08-Dec-18 11:10 AM guess I've just invested more in instruments than tools 08-Dec-18 11:10 AM but that's starting to change 08-Dec-18 11:10 AM Well, at least you have a lathe. 08-Dec-18 11:10 AM yes. 08-Dec-18 11:11 AM oh yes, the lathe is worth it's weight in gold 08-Dec-18 11:11 AM At some point I will /looks around for true Mods/ demand a machining channel. 08-Dec-18 11:12 AM XD 08-Dec-18 11:27 AM I'm guessing most everyone here has at least some machining capabilities at home? 08-Dec-18 11:27 AM I'd hope so, it's so much fun 08-Dec-18 11:27 AM it's just that there is no splitting of #general / creating of new channels is planned atm 08-Dec-18 11:29 AM Not that many people, I think. 08-Dec-18 11:29 AM Gigabequerel, Adam McCombs, Dave 32768 and me that I am aware of. 08-Dec-18 11:30 AM is it possible to do any high vacuum stuff without machining? 08-Dec-18 11:30 AM oh, dave's here, too? 08-Dec-18 11:30 AM Conmega has access to a family lathe, I think. 08-Dec-18 11:30 AM Yeah, but he is in disguise. 08-Dec-18 11:30 AM XDDDD 08-Dec-18 11:30 AM ah right, I see him now 08-Dec-18 11:31 AM Qualia has done good so far only buying things. 08-Dec-18 11:33 AM isn't buying all the HV stuff and not doing anything yourself way to expensive? 08-Dec-18 11:34 AM Not in US at least, they have exceptionally good shippings, unlike overseas to us. so things come cheaper. 08-Dec-18 11:35 AM yeah, I guess 08-Dec-18 11:39 AM For example, the vacuum valves. I bought my pneumatic one for like 60€. In US it costs 20, shipped. 08-Dec-18 11:39 AM I'm currently bidding on a geiger counter from RTF technologies, which is going to be at least 30 bucks in shipping :< 08-Dec-18 11:39 AM (the same valve, same seller) 08-Dec-18 11:39 AM Technically yes, but it's tough. I have to outsource some machining, but not much is needed 08-Dec-18 11:40 AM But if not that much is needed, then sourcing machining is cheaper than owning a complete workshop. (a different matter is the fact that if you own the workshop, then you can do anything 08-Dec-18 11:40 AM Ebay is a lifesaver, only way a lot of this can be done for sure. Being in the US though really helps 08-Dec-18 11:40 AM Yeah, but it still costs a lot for simple stuff. Like the plates for exanple 08-Dec-18 11:41 AM a lot is relative. 08-Dec-18 11:41 AM how much have the plates costed? 08-Dec-18 11:41 AM 500$? 08-Dec-18 11:42 AM No less, I'm getting both for $350. That's a fairly large chunk of my reserve budget at the monent 08-Dec-18 11:42 AM A mill capable of doing them, could easily cost 3000$ not counting a dividing head. and also weight, it would be pretty hefty. 08-Dec-18 11:42 AM I have lucked out getting a lot of vacuum stuff free though 08-Dec-18 11:43 AM (and I'm thinking secondhand) 08-Dec-18 11:43 AM Like the 2 diff pumps and a bunch of chamber stuff 08-Dec-18 11:43 AM yeah. 08-Dec-18 11:43 AM I wonder how come chinese don't make cheap diff pumps. 08-Dec-18 11:43 AM they are not that complicated. 08-Dec-18 11:44 AM I guess everyone want's a TMP now 08-Dec-18 11:44 AM I don't 08-Dec-18 11:44 AM I have one 08-Dec-18 11:44 AM XDDDDDDDDD 08-Dec-18 11:45 AM I like diffs for raw speed and robustness 08-Dec-18 11:45 AM TMP's grant bragging rights, sorry. 08-Dec-18 11:45 AM damn you, nixie 08-Dec-18 11:45 AM Cooling is annoying though 08-Dec-18 11:45 AM water or air? 08-Dec-18 11:45 AM Water 08-Dec-18 11:45 AM oh 08-Dec-18 11:45 AM well 08-Dec-18 11:46 AM oh, yes, now that we are talking about that. How come that diff pumps don't have just a water jacket? and they all sort of have coils around? 08-Dec-18 11:46 AM cheaper and easier to manufacture I guess 08-Dec-18 11:47 AM (should switch to #general, gentlemen) 08-Dec-18 11:47 AM My cooling system cost more than I wanted lol, but it's fully closed loop and fairly compact. And my vote is also probably cheaper 08-Dec-18 02:04 PM I wish I knew how to use a lathe lmao 08-Dec-18 02:55 PM It's not that difficult. 08-Dec-18 02:55 PM it turns the piece, you push the cutter against said piece. 08-Dec-18 02:55 PM Milling is much more complex. 08-Dec-18 03:39 PM yeah but like if you wanna make something that isn't a cylinder with lines in it 08-Dec-18 03:43 PM XDDD 08-Dec-18 03:43 PM works for lines and profiles. 08-Dec-18 03:43 PM in fact, much of the basics of lathe usage, is how not to get killed. 08-Dec-18 03:43 PM (a bicicle can kill you the same way, it's just putting some common sense on it) 08-Dec-18 03:45 PM fwiw lathes are much easier to crash and burn than milling machines 08-Dec-18 03:45 PM especially cnc ones 08-Dec-18 03:49 PM Hmmm...yeah, I have to agree to that. 08-Dec-18 03:49 PM @sync apart from work, do you do machining as a hobby? 08-Dec-18 03:50 PM yes 08-Dec-18 03:50 PM it's mostly my hobby tho 08-Dec-18 03:51 PM Excellent. 08-Dec-18 03:51 PM (just probing to see how many machinists there are in here, to, at some point, demand ( ) a Machining channel) 08-Dec-18 03:51 PM We are five that I know of. 08-Dec-18 03:53 PM it's funny because I got into machining due to vacuum stuff, then did vacuum stuff professionally and now I repair and retrofit machines for fun and profit 08-Dec-18 03:53 PM XDDDDDD 08-Dec-18 03:53 PM I had machining in my blood before I could walk. the vacuum stuff came later. 08-Dec-18 03:53 PM (much later) 08-Dec-18 03:54 PM well, I'm an EE by trade 08-Dec-18 03:54 PM I'm just a technician. shrugs 08-Dec-18 03:59 PM sure, I just did my degree because why not 08-Dec-18 04:02 PM I just don't have enough brains to do that ^^U 08-Dec-18 04:02 PM (I did not want to disrespect your degree) 08-Dec-18 04:02 PM (btw, I can't understand irony at all, if the "why not" is you being angry, I'm sorry --U) 08-Dec-18 04:11 PM no, it's more like a shrug as well 08-Dec-18 04:11 PM the shrug club. 08-Dec-18 04:11 PM anyways, another machinist added to the list. 08-Dec-18 04:11 PM ^^ 08-Dec-18 04:11 PM If you can/want, someday show your machines ^^ 08-Dec-18 04:18 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/194792f3-7b50-4641-b6fc-628641feded4-1C0F4.png 08-Dec-18 04:18 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/acb7dfd7-fda2-4823-a53c-4dc3c4cd7556-DD54C.png 08-Dec-18 04:18 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/05a64854-066c-4f11-979e-70db297b266b-E3D0B.png 08-Dec-18 04:18 PM OMG...yeah, that's the stuff. 08-Dec-18 04:18 PM Mine are just toys in comparison XDDDD 08-Dec-18 04:19 PM there is also a second weiler 160 cnc sitting around 08-Dec-18 04:19 PM the agie is probably a piece of junk, parts of the control are missing but I have to look in the shed where it came from again 08-Dec-18 04:20 PM Hope you find the missing pieces 08-Dec-18 04:20 PM I have almost no use for a wire edm 08-Dec-18 04:20 PM really? 08-Dec-18 04:20 PM how come so? 08-Dec-18 04:22 PM because they are not trivial to run 08-Dec-18 04:22 PM and the consumables are quite expensive 08-Dec-18 04:22 PM good points. 08-Dec-18 04:22 PM what do you use for stock cutting? 08-Dec-18 04:23 PM a bandsaw 08-Dec-18 04:24 PM ^^ 08-Dec-18 04:25 PM I also have one of those automatic hacksaws but the hydraulic needs work 08-Dec-18 04:26 PM I remember when I bought my bandsaw...my machining time wen't up by 1000% (literally, I wasn't doing much before just because hand sawing for an hour before working just...well.. 08-Dec-18 04:27 PM yeah, although I try to order my stock to size 08-Dec-18 04:28 PM As hobbyst I rarely have that luxury. ^^U 08-Dec-18 04:29 PM well, I keep a stock of stuff from the scrapyard but recently I order stuff to size for most jobs 08-Dec-18 04:29 PM because it is easier than digging through the scrap pile and trying to find a piece that works 08-Dec-18 04:30 PM Yeah, of course! I don't buy from scrapyards though, I only buy new stock, hence buying larger than what I need exactly. 08-Dec-18 04:30 PM My most troublesome material to find is stainless. 08-Dec-18 04:30 PM (been doing a bit of that lately with the oven) 08-Dec-18 04:30 PM the scrapyards here are quite good, but you have to visit often 08-Dec-18 04:31 PM Not sure it would work here in southern spain. being very shy doesn't help either. 08-Dec-18 04:31 PM they are all the same in my experience 08-Dec-18 04:32 PM Might try someday. 08-Dec-18 04:34 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/672db7a1-3d82-46d9-bd7d-231e91975385-60DFC.png 08-Dec-18 04:34 PM that's a mildly interesing piece of junk I need to get running again 08-Dec-18 04:34 PM it's a laserwhat? 08-Dec-18 04:34 PM It has a guide parallel to the laser tube, but cant understand more 08-Dec-18 04:34 PM it's a form talysurf 08-Dec-18 04:35 PM XD, damn dyno 08-Dec-18 04:35 PM WTH is that? 08-Dec-18 04:35 PM https://www.cottandco.com/media/lot/251-%281%29.JPG 08-Dec-18 04:35 PM basically a translating stage with an interferometer and a second interferometer on the stylus 08-Dec-18 04:36 PM ohh! 08-Dec-18 04:36 PM so you can measure form and surface parameters 08-Dec-18 04:36 PM wow 08-Dec-18 04:36 PM yeah, that needs to get back to work for sure 08-Dec-18 04:36 PM what is it missing? 08-Dec-18 04:37 PM some pieces between the control and the computer 08-Dec-18 04:37 PM but I'm not going to use the original computer 08-Dec-18 04:37 PM it is some data general mainframe derived thing 08-Dec-18 04:38 PM The precision in that must be incredible. 08-Dec-18 04:38 PM meh, I'll probably throw it away at some point knowing myself 08-Dec-18 04:38 PM Noooo 08-Dec-18 04:38 PM should you attempt to do that, ask here if someone can pick it up 08-Dec-18 04:38 PM please 08-Dec-18 04:38 PM yeah the resolution is pretty good, on the translation stage iirc around 300nm and on the height depending on the styli around 20nm 08-Dec-18 04:39 PM ooof... 08-Dec-18 04:40 PM the funny thing is that it is completely useless even if I get it running because I do not have a calibration standard 08-Dec-18 04:40 PM as it can only measure angular change on the stylus and has no knowledge of its length 08-Dec-18 04:41 PM Hm... 08-Dec-18 04:41 PM well...if you throw it away, someone might use the interferometer for something else. 08-Dec-18 04:42 PM one application where it is useful is to measure lenses for their shape 08-Dec-18 04:42 PM Hm...interesting 08-Dec-18 04:42 PM the interferometer is nothing special 08-Dec-18 04:44 PM well, it's free if it's thrown away. 08-Dec-18 04:44 PM but the measuring of the lenses only works for circular ones, or can it integrate something with a rotary addon? 08-Dec-18 04:48 PM you could add a rotary stage if you wanted 08-Dec-18 04:48 PM but even if you have a square lens you can measure both directions at different parts 08-Dec-18 04:50 PM Ah 09-Dec-18 04:06 AM @Nixie I'm doing some machining. I've had a shop pretty much all my life, but mostly doing wood and aluminum for handyman and electronics projects, with no particular precision. But recently my son got interested in machining, and we got a mini lathe last year, and now a full size vertical mill (which we have not got hooked up yet). The hollow cathodes in my system are my first lathe work. At work I have done some mechanical design and had parts made by a shop, like for putting together a 6 degree of freedom stage. http://humancond.org/wiki/user/ram/resume/expedients 09-Dec-18 04:15 AM Reading the chat I missed out on since 18h ago took longer than auditing the merge request earlier 09-Dec-18 04:57 AM BAHAHAHAHHA 09-Dec-18 04:57 AM Then we are at least six machinists in here. 09-Dec-18 04:57 AM good, good. 09-Dec-18 06:04 AM Woohoo, new video from this old tony 09-Dec-18 06:04 AM (on the topic of machining ^^) 09-Dec-18 06:06 AM Wee ha! 09-Dec-18 07:09 AM https://www.youtube.com/watch?v=hBYMZK_YGgc 09-Dec-18 07:09 AM Not the rocket in the pic, a different one. 10-Dec-18 12:20 AM Just because you were encouraging me to finish something @Nixie I attempted to finish off a track I had been working on https://soundcloud.com/user-941235850/chill1-1 10-Dec-18 12:28 AM 10-Dec-18 12:28 AM Pretty interesting sound. (I totally lack musicl knowledge, so I can't give positive or negative feedback other than a subjective apreciation, sorry!) 10-Dec-18 12:28 AM Also, congrats! 10-Dec-18 12:28 AM Now, onto more things! 10-Dec-18 02:31 AM Subjective appreciation (or distaste) is all that is necessary - this is art, not engineering 10-Dec-18 03:07 AM Very smooth. Nice! 10-Dec-18 04:36 AM TY 11-Dec-18 06:35 AM yeeee, I double checked and I can attach these 6mm tube-ID flame arrestors to my miniature torch. 11-Dec-18 06:35 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/HTB1PgIGSXXXXXbOaFXXq6xXFXXXM-C3688.png 11-Dec-18 06:35 AM 4mm flame arrestors, (the pair) costed 80/90€ 11-Dec-18 06:35 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/eng_pm_Flashback-arrestors-oxygen-975-1-S--9DCCD.png 11-Dec-18 07:36 AM Also, all e-beam experiments (the true ones) will have to wait 2 months, I can't afford to buy all the glass, vidicon and other stuff right now. 11-Dec-18 12:11 PM I've got some (minor) machining capabilities at home too - lathe, mill drill, band saw, tig/mig, and plasma cutter so far. learning how to use it all effectively before I acquire anything more. (grandpa was a machinist by trade and hobby, I inherited his home workshop) 11-Dec-18 01:02 PM ("minor"????? ) So, we are seven now. We're getting closer to a machining chat. 11-Dec-18 01:08 PM nowhere near unless adam says so 11-Dec-18 01:26 PM Of course, dad has final word. But machining is, generally, pic intensive and trade-knowledge is, many times, oral lore. Since we are in a particular section of machining that deals with vacuum, rf, etc, it's not like we are going to discuss machining basics (unless a newbie asks) but particular techniques and procedures that only these areas require. I also don't like to hijack #general or #show-and-tell with machining pics, wich, on my mind, always carry information about procedures, that might get lost for the few interested, as I would like to see their technique photos. It might be just me, I am totally prepared for a DoS on the idea, but would love it. 11-Dec-18 03:42 PM Enjoy 12-Dec-18 05:27 AM @Leona do you still need the knobs? I'm on my way to an electronics store with a high chance of having them in stock 12-Dec-18 05:30 AM We are not going to leave her alone until that scope gets fixed. 12-Dec-18 05:50 AM yep 12-Dec-18 05:50 AM dosen't help if they're not online... 12-Dec-18 09:42 AM Thanks for the offer @GigaSquirrel . I still need a knob, but Nixie has some spares and offered to mail them over. I just need to get over the anxiety/ deal with my concerns with giving someone my mail address. 12-Dec-18 09:54 AM Don't worry, we're in this together, @Nixie has my address, too :) 12-Dec-18 10:12 AM @Leona , why didn't you say that for starters? I can send it to someone else or a PO box! 12-Dec-18 10:12 AM You can also tell us to stop messing with you. ^^U 12-Dec-18 10:42 AM oh, I know what we're missing here! 12-Dec-18 10:42 AM ?cat 12-Dec-18 10:42 AM Found one! 12-Dec-18 10:42 AM that's better 12-Dec-18 12:42 PM Uhg, I wish I was working with HV plumbing at the moment and not the housing plumbing I am dealing with 12-Dec-18 12:42 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/unknown-A3056.png 12-Dec-18 12:42 PM just ordered these 12-Dec-18 12:42 PM have to replace an old rusted shut cast iron cleanout in my basement yayyyy 12-Dec-18 01:25 PM Damn. Did you found the water source in the end? 12-Dec-18 01:36 PM Its not a water source issue, its a blockage issue... 12-Dec-18 01:36 PM Roots in the line from trees in the front yard. 12-Dec-18 01:36 PM rooted it once, it got clogged up again. had to root it again myself to save 400 bucks... was not fun let me tell you... 12-Dec-18 01:36 PM Suppose you could say I've seen some shit rolls eyes 12-Dec-18 02:08 PM Sorry to hear that. 12-Dec-18 08:05 PM ?cat 12-Dec-18 08:05 PM Found one! 12-Dec-18 10:31 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/u4gtavlscthp1p1awtap-825DB.jpg 14-Dec-18 09:56 PM Who's up? 14-Dec-18 09:56 PM Going to be working all night on designing a new mount for my extruder and fan that I bought 14-Dec-18 10:04 PM @qualia https://twitter.com/jarv21929527/status/1073819687593496579?s=19 ffs 14-Dec-18 10:05 PM goddess i can't deal with people who instantaneously naysay all over things made to have pleasant aesthetics in addition to being workable/functional 14-Dec-18 10:05 PM just let people have nice things ok sheesh it's not that over the top to have a little pleasant aesthetics now and then, goodness gracious 14-Dec-18 10:05 PM goes back to putting heart stickers all over their vacuum control hardware 14-Dec-18 10:21 PM Pffft 14-Dec-18 10:21 PM We still have a bunch of giant googly eyes like the ones we put on our Roomba and the 3d printer 14-Dec-18 10:21 PM It's very fun to have them on things, despite maybe being a touch inconvenient 14-Dec-18 10:59 PM I was going to post about the 3d printer retrofitting stuff to Twitter but 1. I realized It's not that cool it's just CAD, and 2 that takes forever. It's way easier to just not. Now I feel like 10x more relaxed 14-Dec-18 11:51 PM XD 14-Dec-18 11:51 PM You can just share something here 14-Dec-18 11:51 PM We are way more interested 14-Dec-18 11:51 PM Also, morning! \o/ 14-Dec-18 11:53 PM Morn 14-Dec-18 11:53 PM I bought small googly eyes in a shop a month ago...and they where NOT adhesive. I was soooo disapointed. 14-Dec-18 11:53 PM Rip 14-Dec-18 11:53 PM ...Ing, zhang. You sound like need something in your system 14-Dec-18 11:54 PM Being British, I think I shall start by making myself a bit of a laughing stock, and then move onto drinking tea. 14-Dec-18 11:54 PM Hmm, aesthetics comes up 14-Dec-18 11:54 PM I want some giant googly eyes, so I can eyebomb street furniture. 15-Dec-18 01:34 AM Rofl 15-Dec-18 06:56 AM need more off topic talk 16-Dec-18 02:01 AM Kinda running out atm. 16-Dec-18 02:07 AM I bought some cheap LNBs yesterday, only to find out that they no longer have a DRO LO and discrete mixer 16-Dec-18 02:07 AM everything is now handled in a single chip, which has a PLL, mixer and lpf in it 16-Dec-18 02:07 AM no more diy k band transmitter 16-Dec-18 02:07 AM at least the preamps are still discrete, so you can still get the fets from them 16-Dec-18 05:22 PM Random info; Roombas have a serious amount of screws... And a documented command port 16-Dec-18 05:22 PM Oh yeah 16-Dec-18 05:22 PM It's a ton of fun 16-Dec-18 05:22 PM I took a romba, stuck a Samsung q1 ultra windows xp era tablet and a Kinect on one 16-Dec-18 11:35 PM Neat! Any uses for that or just a because it can be done? 16-Dec-18 11:35 PM I was in high school and though it would be fun 18-Dec-18 09:55 AM @GigaSquirrel Buy HB100 10GHz modules from ebay like the rest of us who can no longer buy moddable LNB's 18-Dec-18 09:55 AM those doppler radar things? 18-Dec-18 09:55 AM the CDM324 24GHz modules only have a PCB resonator. So they drift and are suspectiple to objects near them. Seen them do frequencies between 23-27GHz out of the box. 18-Dec-18 09:55 AM Yes those doppler modules 18-Dec-18 09:55 AM they have a 10.525GHz nominal DRO osc in them 18-Dec-18 09:56 AM oh, cool 18-Dec-18 09:56 AM and I think BAT14-099 based mixer 18-Dec-18 09:56 AM I should have one of these flying around here... 18-Dec-18 09:56 AM And tune down to 10.3GHz, don't recall the upper range 18-Dec-18 09:56 AM The new cheap PLL based LNB's are both nice and sad at the same time 18-Dec-18 09:56 AM Nice as they ARE PLL based LNB's for under 4eur shipped, but bad as in not being cheap targets for modifying in to transmitters and upconverters with built in horn antennas. 18-Dec-18 10:02 AM yep 18-Dec-18 02:30 PM oh btw, how can i post pictures here? 18-Dec-18 02:30 PM ah... the plus directly left of the textbox? 18-Dec-18 02:32 PM yep 18-Dec-18 02:33 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_7590_re-9B1BF.jpg 18-Dec-18 02:33 PM ha, it works! 18-Dec-18 02:33 PM hey, I know that book! 18-Dec-18 02:34 PM found this book today at a bookshop... and oh my god this book is amazing 18-Dec-18 02:34 PM it's from 1913 btw 18-Dec-18 02:34 PM the title is "The Radium and the Radioactivity" btw 18-Dec-18 02:35 PM i think they should be able to translate that even without knowing any german... 18-Dec-18 02:36 PM better safe than sorry? 18-Dec-18 02:45 PM the book is a clear case of "if only they knew" 18-Dec-18 02:53 PM and a case of "no no no no no no no no no no no no no" 18-Dec-18 02:53 PM and soooo many things i did not know 18-Dec-18 02:53 PM for example that in 1913, there was a total of 13 grams of purified Radium in the whole world, with quite some demand for more, making it the most expensive substance of the time 18-Dec-18 10:12 PM XD 18-Dec-18 10:12 PM @Pan Da you can also paste images directly with ctrl+V (it will prompt you to add a comment, but can be left blank) 19-Dec-18 01:50 AM das radium 19-Dec-18 02:45 AM pro living in Germany: lot's of high-tech industry, so no problem to find turbopumps, measurement and hv equipment on ebay & co 19-Dec-18 02:45 AM con Germany: huge tech communty & lots of resellers, so everything is super expansive and it's hard to actually make a good deal 19-Dec-18 02:51 AM just get into a niche 19-Dec-18 02:59 AM I am, and still there are people that do ebay for a living who buy everything that looks expansive without knowing what it is, usually reselling it for a way too high price 19-Dec-18 02:59 AM XDDDDDDDDDD 19-Dec-18 03:00 AM yeah, it's becoming harder to get a good deal on ebay, that's why you have to get contacts in your niche 19-Dec-18 03:01 AM Like, look, I understand that this vacuum equipment is somewhat rare and probably cost a fortune when bought new, but still it's 20 year old, completely conterminated with oil and dust, the cables are cut off and you won't sell this thing for any more than the scrap metal price 19-Dec-18 03:03 AM or somebody needs parts for his existing system and is able to pay this price 19-Dec-18 03:06 AM Yeah, but who does that? 19-Dec-18 03:06 AM XDDDDD 19-Dec-18 03:06 AM If it's a company they have service technicians that repair equipment 19-Dec-18 03:06 AM first world problems. 19-Dec-18 03:08 AM where do you get your stuff? 19-Dec-18 03:08 AM and how do you repair equipment without spare parts? 19-Dec-18 03:09 AM mostly some shady "unter der hand" deals, often times for basically free cough 19-Dec-18 03:09 AM the manufacturer has spare parts 19-Dec-18 03:09 AM new spare parts 19-Dec-18 03:09 AM no serious company would replace parts of a productive machine with parts from ebay... 19-Dec-18 03:09 AM at least not in Germany 19-Dec-18 03:10 AM yes, they would and they do 19-Dec-18 03:10 AM and "the manufacturer" often wants to sell new machines 19-Dec-18 03:10 AM evil stare at berthold 19-Dec-18 03:11 AM @GigaSquirrel okay, for that I'm lacking the connections 19-Dec-18 03:12 AM yeah, getting the right ones takes a sh!tton of luck 19-Dec-18 03:13 AM I mean I can't complain, I also got a ton of equipment for free like that, but it's more like "hey, do you have a use for xy" and not like "hey dude, I need xy, can you get it for me?" 19-Dec-18 03:13 AM so when looking for specific parts I'm kinda lost 19-Dec-18 03:14 AM time to build connections 19-Dec-18 03:15 AM okay lemy try 19-Dec-18 03:15 AM HeY @GigaSquirrel DO You Have Micro X-ray? 19-Dec-18 03:15 AM XDDDDDDD 19-Dec-18 03:16 AM well, I don't... 19-Dec-18 03:17 AM https://youtu.be/jiVACqhLsvg 19-Dec-18 03:17 AM This video is unavailable. 19-Dec-18 03:17 AM click again 19-Dec-18 03:17 AM it is totally off, off-topic. 19-Dec-18 03:17 AM but had to share. 19-Dec-18 03:18 AM This video is unavailable. 19-Dec-18 03:18 AM still unavailable 19-Dec-18 03:20 AM BOH, they made it unavaliable 19-Dec-18 03:20 AM then make it officially avaliable... 19-Dec-18 03:20 AM (copyright fluff) 19-Dec-18 03:20 AM https://www.reddit.com/r/television/comments/a4ikv2/ge_big_boys_appliances_for_men_snl/ 19-Dec-18 03:23 AM Video unavailable The uploader has not made this video available in your country. 19-Dec-18 03:23 AM racist. 19-Dec-18 03:23 AM yeah, but some might be able to VPN it 19-Dec-18 03:23 AM (or whatever it's called to use an anonymous server) 19-Dec-18 03:23 AM the video is priceless. 19-Dec-18 03:23 AM (I saw it through whatsapp) 19-Dec-18 08:32 AM https://www.ebay.co.uk/itm/Must-have-Mammography-Technologist-Im-Not-Superwoman-Standard-Womens-T-shirt/382614173598 19-Dec-18 08:32 AM I was looking for x-ray sensors 19-Dec-18 09:05 AM hehe 19-Dec-18 09:05 AM surely an ice breaker 19-Dec-18 11:28 AM Rofl 19-Dec-18 01:58 PM This place seems to be an interesting influence. Reading this discord and having had a stressful workweek involving vacuum leaks and torrseal, I had a wonderful dream of dumpsterdiving 5pcs of pfeiffer vacuum gauges in various states of repair. 19-Dec-18 02:04 PM would someone reship something for me from Murica to Germoney? 19-Dec-18 02:31 PM Someone should be willing, I guess. 19-Dec-18 02:31 PM What a dream. 19-Dec-18 02:36 PM Yup. 19-Dec-18 02:36 PM I'm definitely a geek. 19-Dec-18 02:42 PM Congrats, you are in the best spot, then. 19-Dec-18 03:31 PM @N00N the book really is great... and has some pretty creepy details as well 19-Dec-18 10:31 PM Wich book? 19-Dec-18 10:31 PM Ah, the das radium, right. 20-Dec-18 02:35 PM i was thinking about reading the book to you guys in the voice channel 20-Dec-18 02:35 PM then i remembered i have no working mic 20-Dec-18 02:35 PM and most of you probably wouldn't understand anything since it's all german 20-Dec-18 02:36 PM looking at the list of active users I'm starting to think the non-germans are outnumberd 20-Dec-18 02:39 PM huh, well... if i only had a way of getting my voice into this stupid box 20-Dec-18 02:43 PM https://www.ebay.de/itm/183341071780 20-Dec-18 02:43 PM might be here once you're back 20-Dec-18 02:47 PM right, this might work 20-Dec-18 02:48 PM want me to order it? 20-Dec-18 02:48 PM don't you have a spare one lying around? 20-Dec-18 02:48 PM will be your early / very late christmas gift 20-Dec-18 02:48 PM I should 20-Dec-18 02:48 PM but you know how it is, cleaning your room... 20-Dec-18 02:48 PM lemme check 20-Dec-18 02:48 PM hm, found none 20-Dec-18 10:45 PM @Pan Da can't you find a translation? 20-Dec-18 10:45 PM I would read passages from the history of semiconductors. 20-Dec-18 10:45 PM and thus, this channel was transformed into a book club. 21-Dec-18 02:15 AM btw is anyone coming to 35c3? 21-Dec-18 02:19 AM not me 21-Dec-18 02:36 AM (will the next one be called 36C3? ) 21-Dec-18 02:38 AM yep 21-Dec-18 06:25 AM Nobody is safe from internet. Not even gruesome accidental radiation deaths. 21-Dec-18 06:25 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/DuwT6UXVAAATSLi-2CC93.png 21-Dec-18 06:49 AM I wonder how long it takes until there is R34 of that 21-Dec-18 07:00 AM Dr Manhattan from Watchmen is radiation accident r34 21-Dec-18 07:23 AM @Nixie i could certainly translate some passages, but i don't think i'll be able to find a translation of the entire book 21-Dec-18 08:01 AM wouldn't it be more like R134a for us? 21-Dec-18 08:03 AM @Nixie let's start with a paragraph from the chapter "flourescence phenomena": 21-Dec-18 08:05 AM are you going to read it? ^^ 21-Dec-18 08:05 AM (like, in the voice channel) 21-Dec-18 08:05 AM you need a fireplace and a comfy chair 21-Dec-18 08:05 AM (just messing with you) 21-Dec-18 08:07 AM no messing, it has to be like that! 21-Dec-18 08:10 AM "one can, as Giesel showed, even see the radium light with closed eyes. If one places a radium compound close to the temple, while both eyes are closed, one can immediately get a light sensation. This sensation likely comes from flourescence of the aqueous humour. especially interesting is the fact that this radium light is even seen by blind persons with intact retina." 21-Dec-18 08:10 AM @Nixie no, just the translation this time. if i find a big comfy fireplace, a red robe and a wing chair, I'll let you know 21-Dec-18 08:12 AM @GigaSquirrel better make sure he finds that. 21-Dec-18 08:12 AM O-M-G 21-Dec-18 08:12 AM he died shortly afterwards, right? 21-Dec-18 08:13 AM not shortly, but yes, he died. @GigaSquirrel , what was the summary of his other scientific experiments? 21-Dec-18 08:13 AM koks und nutten 21-Dec-18 08:13 AM Cocaine and hookers... no, not hookers 21-Dec-18 08:13 AM no wait 21-Dec-18 08:13 AM BAHAHAHAHAHAH 21-Dec-18 08:14 AM ...there you have it. thinking alike. damn clone! 21-Dec-18 08:14 AM https://en.wikipedia.org/wiki/Friedrich_Oskar_Giesel 21-Dec-18 08:14 AM it was that guy 21-Dec-18 08:16 AM Interesting. 21-Dec-18 08:16 AM and very dead. 21-Dec-18 08:17 AM Giesel has also taken part in the findings on radioactivity with regard to its physiological effects in what are, from today's perspective, as murderous self-experiments. The years of unprotected, carefree handling of radiant substances finally took its toll. After a long and tormenting illness he died in 1927 at the age of 75 years. 21-Dec-18 08:17 AM translated by google translate 21-Dec-18 08:17 AM Together with his university teacher Carl Liebermann, he provided some fundamental scientific contributions on quinine and cocaine. 21-Dec-18 08:21 AM XDDDDDDDDD 21-Dec-18 08:21 AM that guy knew how to party 21-Dec-18 08:22 AM He was rad for sure. 21-Dec-18 08:22 AM xD 21-Dec-18 08:23 AM but the other ones as well. 21-Dec-18 08:23 AM first scientific experiments on radiation sickness were some folks painting their forearms with concentrated radium salt solutions and watching the effects over the next couple of months 21-Dec-18 08:25 AM mhhh, lasagna 21-Dec-18 08:25 AM no wait, wrong guy 21-Dec-18 08:25 AM sorry, no horses involved 21-Dec-18 08:25 AM and also no 120 some TBq of SR90 21-Dec-18 08:25 AM or was it 1200? 21-Dec-18 08:25 AM [..]which were later found to be two 90Sr radioisotope sources with an activity of 1295 TBq. 21-Dec-18 08:25 AM whoops 21-Dec-18 08:29 AM so...they lost their arms? 21-Dec-18 08:29 AM actually no 21-Dec-18 08:30 AM just some barely healing flesh wounds 21-Dec-18 08:39 AM well... 21-Dec-18 08:40 AM if you think so... I'd call that bad 21-Dec-18 08:48 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/Z-29B8E.png 21-Dec-18 08:53 AM xD 22-Dec-18 03:26 AM Am I the only one who needs this in his workshop? 22-Dec-18 03:26 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/unknown-D2F90.png 22-Dec-18 09:41 AM Ohohoho, splendid! 24-Dec-18 05:59 AM Just got a very stern reminder of the second reason I wear those for, when the tip of an exacto knife flew through my bedroom and bounced off them. 24-Dec-18 05:59 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20181224_1454222-8A729.jpg 24-Dec-18 06:00 AM oof 24-Dec-18 07:26 AM yesterday I cutted some PLA and a bit flew in my eye 24-Dec-18 07:26 AM nothing serious tho, just a bit irritated :D 24-Dec-18 07:59 AM I need to find some that work over my prescription glasses. :/ Glad u ok, Leona. 24-Dec-18 08:57 AM Well, what doesn't kill me, only tests my safety protocols ... 24-Dec-18 10:36 AM And let's you know whether you need to implement more! 24-Dec-18 01:47 PM I don't need any more :-) 24-Dec-18 03:28 PM Foto de Armilar Zifferblatt 24-Dec-18 03:28 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG-20181224-WA0003-2AD93.jpg 24-Dec-18 03:29 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/photo_2018-12-25_00-29-03-A2E51.jpg 25-Dec-18 01:31 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/A_Merry_Christmas_German_Santa_in_Green_Ro-AF636.jpg 25-Dec-18 04:42 AM Leo 25-Dec-18 04:42 AM Lel 26-Dec-18 05:14 PM Oh wow, 4 people online 26-Dec-18 05:14 PM that's gotta be a new record! 26-Dec-18 10:12 PM XD 26-Dec-18 10:12 PM Well we are back up to 14 now! 26-Dec-18 10:12 PM It looks like the Christmas shutdown is over for some of us 26-Dec-18 10:12 PM I have a terrible decision to make right now 26-Dec-18 10:12 PM Do I go run my SEM, or spend 1000$ or some one else's money for setting up a SEM lab 26-Dec-18 10:12 PM So anyways what are some lab supplies you all like? 26-Dec-18 10:17 PM We all like? 26-Dec-18 10:18 PM Like cool tools you found 26-Dec-18 10:18 PM that were useful 26-Dec-18 10:18 PM What it is is we got a donation that has to be spent by the end of the year and be used for setting a lab up around the 840 I just installed 26-Dec-18 10:31 PM Ahh! 26-Dec-18 10:31 PM Oh well, spend it in nice things! 27-Dec-18 02:17 AM If you don't have any Ideas yourself: You can never have too many oscopes 27-Dec-18 05:22 AM Finally finished watching your stream yesterday, @qualia Periscope didn't store most of the chat, it seems. 27-Dec-18 05:22 AM Also I prefer blue nitrile gloves. 28-Dec-18 12:23 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/DvXf0MzXcAAEAF4-7CF64.png 28-Dec-18 12:23 AM I also prefer blue nitrile gloves, not just because of this: 28-Dec-18 12:23 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/latest-18481.png 28-Dec-18 09:47 AM My head just thougt that making an invisible friend party in here could bring out some weirdly amusing results. 28-Dec-18 09:47 AM Would there be a way to shuffle the adresses of the participants, so that each one only receives one and can't see other peoples info? 28-Dec-18 09:53 AM ? 28-Dec-18 09:53 AM you mean secret santa? 28-Dec-18 10:01 AM if only your packages would arrive at their Destination :P 28-Dec-18 10:01 AM but yeah, I'd be in with some secret santa stuff, as long as it is inside of the EU, bc. shipping 28-Dec-18 10:08 AM uff 28-Dec-18 10:08 AM yeah, I think for thatone you also want to set a higher limit xD 28-Dec-18 10:08 AM puh 28-Dec-18 10:08 AM not that u ship 15€ for 16€ porto 28-Dec-18 10:08 AM no limit, just raise the lower threshold 28-Dec-18 10:08 AM thats what I meant 28-Dec-18 02:26 PM I was thinking more like handcraft of some sort. The avaliability of stuff depending on place, can be just insane. But that was just a wild idea, don't take it seriously. 29-Dec-18 03:16 AM Awesome, just got a big package from Pfeiffer vacuum! 29-Dec-18 03:16 AM No pumps, which sucks 29-Dec-18 03:16 AM but tons of awesome informational material! 29-Dec-18 03:32 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20181229_123045-5795D.jpg 29-Dec-18 03:32 AM and posters! 29-Dec-18 08:56 AM Hahaha! Nice! 29-Dec-18 05:12 PM yeah 29-Dec-18 05:12 PM sooo 29-Dec-18 05:12 PM I just tested the ignition coil for the spark gap 29-Dec-18 05:12 PM simple NE555 with a PNP driving it 29-Dec-18 05:12 PM if I turn off my power supply (rigol DP832) the spark continues, and the supply shows 0V, 0A, but outputs 9V 29-Dec-18 05:12 PM I might have some EMV issues 30-Dec-18 12:53 AM Moin 30-Dec-18 01:14 AM Morning! \o/ 30-Dec-18 04:40 PM https://www.youtube.com/watch?v=sCuKuUgNfjA Have some high vac porn before I go 31-Dec-18 04:16 AM @GigaSquirrel when I was making some 10-15 mm sparks my scope kept triggering until I put a shorting cap on the ext trigger input (even tho ext trigger was off), and the pulse generator would trigger no matter what. I made a Faraday cage, but never really used it because I moved onto the vacuum stuff. Just setting up a metal sheet ground plane on your bench may help. 31-Dec-18 04:16 AM I'd expect the scope to see some noise, but I've never had my power supply acting up like that 31-Dec-18 08:43 AM It's quite impressive how easily noise from sparks messes with stuff. Scopes crashing and glitching, computer mouse disabled, speakers getting all weird, power supplies messed up. I once set up a 30kv pulser on my desk doing some tests and every time I fired it the phone in my office would ring. 31-Dec-18 08:43 AM nice 31-Dec-18 08:58 AM one of my pc screens reboots every time the gap sparks 31-Dec-18 09:01 AM Yeah, its almost too easy. Seriously makes me worried about the big driver I'm building 31-Dec-18 09:06 AM yep, even my little geiger boost converter was killing one of my screens after tiny sparks 31-Dec-18 02:54 PM Part 15 fcc code... 03-Jan-19 03:50 AM btw is anyone currently bidding on a helium leak detector? 03-Jan-19 03:52 AM not me 03-Jan-19 04:09 AM show me the url and I can tell 03-Jan-19 04:55 AM sure, in 7h 03-Jan-19 04:55 AM (no worries, I'm afraid I acn't afford it anyways, it's already quite expensive) 03-Jan-19 05:59 AM XDDD 03-Jan-19 06:34 AM Omg this plastic is the actual worst to cut 03-Jan-19 06:34 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20190103_053958-F83A8.jpg 03-Jan-19 06:40 AM what are you trying to cut it with? 03-Jan-19 06:42 AM It apparently was polly carbonate so I tried the score and cut method. It's not polly carbonate 03-Jan-19 06:44 AM if it cracked, it might be acrylic. 03-Jan-19 06:44 AM Polycarbonate should only flex. (well, it can actually crack...but...) 03-Jan-19 06:44 AM Yeah my thot 03-Jan-19 06:44 AM Good poly carb will break in a straight line if scored properly 03-Jan-19 06:46 AM AW..."Well, sorry for whatever bad plastic it is ^^U 03-Jan-19 06:47 AM I used to do a lot of acrylic/polycarb fab and this stuff is just behaving odd compared to most 03-Jan-19 06:47 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20180511_020606-59FB5.jpg 03-Jan-19 06:47 AM It might be the texture 03-Jan-19 06:55 AM Yeah, I usually work with 1mm acrylic and just cut it with scoring, never had problems (altough I take care of supporting the edges). 03-Jan-19 10:15 AM If that's a light diffuser it may be polystyrene, which is really brittle and a pain to work with. 03-Jan-19 11:27 AM btw I was looking for this detector: https://www.ebay.de/itm/Alcatel-Heliumdetector-Helium-Leck-Such-Geraet-Helium-Lecksuchgeraet-ASM-120H-/292892482634 03-Jan-19 11:27 AM unfortuantly it got too expensive :/ 03-Jan-19 12:08 PM That happens :/ 03-Jan-19 12:41 PM Okay, this impresses me and makes me puke at the same time. Nfc led for your nails. https://s.click.aliexpress.com/e/beedkxAC 03-Jan-19 12:47 PM tbh that's actually pretty cool 03-Jan-19 12:47 PM What about plastic scintillator nail laquere? 03-Jan-19 12:47 PM what be totally in for that one... 03-Jan-19 12:48 PM if your nails glow you're dead 03-Jan-19 12:48 PM but it would be so fun!!! 03-Jan-19 12:49 PM a very quick way to get you very dead 03-Jan-19 12:50 PM a scintillator sword named Sting. glows blue when nuclear Orcs are near 03-Jan-19 12:50 PM uhhh 03-Jan-19 01:00 PM Bahahahahahaahahaha 05-Jan-19 01:53 AM Foto de Armilar Zifferblatt 05-Jan-19 01:53 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG-20190105-WA0012-C53FB.jpg 05-Jan-19 04:46 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20190105_134424-DA73A.jpg 05-Jan-19 04:46 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20190105_133506-37393.jpg 05-Jan-19 04:46 AM thank you dear scrapyard gods 05-Jan-19 07:49 AM Pretty!! 05-Jan-19 07:49 AM Do they have residual activity? (Something to be measured between inside and outside, I mean) 05-Jan-19 07:58 AM nope, no contamination 05-Jan-19 01:57 PM https://www.takaha-japan.com/wp-content/uploads/2017/01/Solenoid-Cartoon.pdf 05-Jan-19 06:04 PM Those are shield containers for radioactive sources? We call them "pigs" in the US. 05-Jan-19 06:05 PM @GigaSquirrel nice, how many did you get? (and how many do i get?) 06-Jan-19 01:52 AM @Pan Da only those 2. There weren't any new ones in the lead bin and I don't understand how we missed them 06-Jan-19 01:52 AM you can have the bigger one, but I'd like to keep the plastic 06-Jan-19 03:49 AM you just want the big radioactive-symbol, right? the container is just boring ballast :-D 06-Jan-19 03:50 AM https://i.imgur.com/YAGpXPd.png 06-Jan-19 07:50 AM 09-Jan-19 01:59 AM Just started taking a spectrum from my neutron tube, let's wait 12 hours and see what background I have 09-Jan-19 02:05 AM corona? 09-Jan-19 02:06 AM aye 09-Jan-19 02:06 AM hoping to see something like the wall effect 09-Jan-19 02:06 AM I already have one channel at 2 counts! 09-Jan-19 02:07 AM He13, eight? 09-Jan-19 02:07 AM 3 09-Jan-19 02:07 AM nice 09-Jan-19 02:08 AM yep, He3 09-Jan-19 02:08 AM aren't all neutrons at the same energy? just the backgroundcounts to subtract? 09-Jan-19 02:09 AM the tube doesn't give any information about the neutron energy, but gives different output heights depending on some internal effects 09-Jan-19 02:09 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/unknown-1F3EC.png 09-Jan-19 02:09 AM and I want to see if you get the same from corona tubes 09-Jan-19 09:15 AM @GigaSquirrel how much data have you gathered by now? 09-Jan-19 09:17 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/unknown-41AB9.png 09-Jan-19 09:17 AM I'm pretty sure the left peak is just (gamma) background 09-Jan-19 09:17 AM so I'm left with the right peak 09-Jan-19 09:18 AM 09-Jan-19 09:18 AM which doesn't seem to show any steps 09-Jan-19 09:19 AM Where would the steps, should they be, come from? 09-Jan-19 09:19 AM I should amplify my signal some more for higher precision 09-Jan-19 09:19 AM my pic above is where the peaks should be 09-Jan-19 09:19 AM if there are any in corona tubes 09-Jan-19 09:19 AM they come from the resulting particles not giving off their energy to the gas but the wall 09-Jan-19 09:24 AM And you have the corona tubes near the detector then? 09-Jan-19 09:24 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/15470547730071464225544-AC456.jpg 09-Jan-19 09:24 AM (it's this, right?) 09-Jan-19 10:00 AM no ^^ 09-Jan-19 10:00 AM the Corona Tube is the detector, it's like a proportional counter 09-Jan-19 10:08 AM also that voltage regulator tube would work in the glow discharge region, not corona 09-Jan-19 12:10 PM only 1h50 remaining! 09-Jan-19 01:11 PM just one more episode of SG1 and the spectrum is done 09-Jan-19 01:11 PM also I figured out how to connect those dots with lines xD 09-Jan-19 01:12 PM ruler and text marker? 09-Jan-19 01:12 PM or just tippex? 09-Jan-19 01:12 PM I even found a marker that's easy to wash off the display again 09-Jan-19 01:14 PM can you send a screenshot? 09-Jan-19 01:15 PM yes, I can 09-Jan-19 01:15 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/unknown-6D92F.png 09-Jan-19 01:42 PM Oh 09-Jan-19 01:42 PM slowly snails away 09-Jan-19 01:44 PM oh? 09-Jan-19 01:58 PM xD 09-Jan-19 01:58 PM Like, then I understood nothing. 09-Jan-19 01:59 PM Are you familiar with the concept of an proportional counter? 09-Jan-19 02:00 PM Hm...it counts proportions? Like, for cakes? Nope, sorry. 09-Jan-19 02:01 PM ok, let's go way back 09-Jan-19 02:01 PM do you know how a geiger counter works? 09-Jan-19 02:52 PM Sort of, the charged particles increase conductivity in the gas inside the high voltage tube.and.that is measured. afaik. 09-Jan-19 02:55 PM yep, close enough 09-Jan-19 02:55 PM there are different mechanisms for detecting that, in the geiger müller range the particle causes an avalanche, resulting in the whole gas being ionized, which gives off a very large, very easy to detect current spike 09-Jan-19 02:55 PM but no information about the particle energy 09-Jan-19 02:55 PM in a proportional detector the avalanche doesn't ionize the complete gas, but only a fraction, proportional to the energy 09-Jan-19 02:55 PM giving off a smaller current pulse, which is harder to measure properly but contains information about the energy 09-Jan-19 02:58 PM Ahhh 09-Jan-19 02:58 PM I understand, sensei. 09-Jan-19 02:58 PM bows 09-Jan-19 02:58 PM in a neutron detector the neutron can't ionize the gas, but undergo a nuclear reaction with it, resulting in a nucleus decaying into particles that can ionize 09-Jan-19 02:58 PM that's a proportional neutron counter 09-Jan-19 02:58 PM you want it to be proportional instead of geiger mode so you can reject all pulses that do not have the energy of the particles the nucleus decays into, making gamma rejection very easy 09-Jan-19 02:58 PM a corona proportional counter is just a variation of that with a very small current (few µA) running through the gas, making it even more blind to gamma 09-Jan-19 03:02 PM Ahhhhh 09-Jan-19 03:02 PM And you where using that to measure background radiation. 09-Jan-19 03:03 PM yep 09-Jan-19 03:03 PM Niiiiiiice 09-Jan-19 03:03 PM So, in a underground lab it would measure less. 09-Jan-19 03:05 PM actually I'm not sure if more neutrons come from space or the earth 09-Jan-19 03:06 PM Ah 09-Jan-19 03:07 PM but yes, something would change 09-Jan-19 03:07 PM >>Most of the natural neutron background is a product of cosmic rays interacting with the atmosphere. The neutron energy peaks at around 1 MeV and rapidly drops above. At sea level, the production of neutrons is about 20 neutrons per second per kilogram of material interacting with the cosmic rays (or, about 100–300 neutrons per square meter per second). 09-Jan-19 03:07 PM although I could not find a source for the couple hundred neutrons / m²*s 09-Jan-19 03:16 PM Oh. 09-Jan-19 03:18 PM well, I found one 09-Jan-19 03:29 PM let's continue here 09-Jan-19 03:29 PM don't tell the people what to do! 09-Jan-19 03:29 PM that's my job 09-Jan-19 03:30 PM Sorry, but I.cannot allow you to change topic from radioactive things, to puns. 09-Jan-19 03:30 PM Keep on-offtopic 09-Jan-19 03:30 PM no, your job is being cute and standing around decoratively @GigaSquirrel ^ 09-Jan-19 03:31 PM What source did you find? 09-Jan-19 03:31 PM shrug I was done with that topic 09-Jan-19 03:31 PM I wasn't. 09-Jan-19 03:31 PM https://inis.iaea.org/collection/NCLCollectionStore/_Public/37/004/37004323.pdf 09-Jan-19 03:31 PM Who is lewd now, @Pan Da ? 09-Jan-19 03:31 PM @Pan Da I hope I'm doing well :3 09-Jan-19 03:32 PM @Nixie i don't see lewdness in that. i didn't even call you daddy today! 09-Jan-19 03:32 PM Are you ever going to try a high altitude balloon measurement? 09-Jan-19 03:33 PM @GigaSquirrel perfectly fine 09-Jan-19 03:33 PM yay 09-Jan-19 03:33 PM now kiss 09-Jan-19 03:33 PM I need two plastic toys of you both 09-Jan-19 03:33 PM LEWD! 09-Jan-19 03:34 PM I'd love to take my neutron detector on a plane, but it is the perfect example of what a makeshift bomb looks like 09-Jan-19 03:34 PM ok, stop it now, guys. it's all fun and games until someone loses an eye or two 09-Jan-19 03:34 PM I would make weird photos of them doing bad things. Using incorrect screwdrivers, not using gloves with acids... 09-Jan-19 03:34 PM been there, done that 09-Jan-19 03:35 PM @Nixie noooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooo! 09-Jan-19 03:35 PM What? I can't see.what you said @Pan Da 09-Jan-19 03:35 PM gimme back my eyes 09-Jan-19 03:35 PM Okay. I think I know what is happening here. 09-Jan-19 03:35 PM We have been silent for christmas 09-Jan-19 03:37 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20190110_003651-478C1.jpg 09-Jan-19 03:37 PM won't get anymore bomb-like 09-Jan-19 03:38 PM Yes if you add a timer and some wires. 09-Jan-19 03:41 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20190110_004045-8FEA9.jpg 09-Jan-19 03:41 PM I should start building movie props 09-Jan-19 03:42 PM hahahahah 09-Jan-19 03:42 PM nice 09-Jan-19 03:50 PM Gigabequerel goes bang. 09-Jan-19 03:56 PM how to guantanamo 09-Jan-19 04:00 PM worth it 09-Jan-19 04:00 PM anyway, I'm gonna go sleep now 09-Jan-19 04:00 PM good night 09-Jan-19 04:41 PM @GigaSquirrel Does proportional-mode neutron counting produce any kind of incident-neutron-energy resolution? I thought it'd all get smeared into uselessness due to moderation 09-Jan-19 04:41 PM 'proportional' just refers to the region of townsend discharge it operates in, right? 09-Jan-19 04:52 PM also also, i would guess that very nearly all terrestrial neutron flux is secondary/tertiary air shower byproducts, owing to the short half-life of free neutrons & the steady mean free path decrease through our atmosphere 09-Jan-19 04:52 PM http://adsabs.harvard.edu/full/1969SoPh....6..339F this paper from 1968 supposes a neutron flux of 2*10^-2 neutrons/cm^2 sec at ... whatever altitude 4g/cm^2 corresponds to (sea level is 1kg/cm^2) 10-Jan-19 01:05 AM @qualia The proportional counter dosen't give any information about the neutron energy, even if it wasn't smeared by moderation 10-Jan-19 01:05 AM and yes, proportional is just the operating region 10-Jan-19 04:48 AM Back on a chair! (at least for a short period) 10-Jan-19 04:48 AM yeah! 10-Jan-19 06:06 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20190110_090402255-F18AA.jpg 10-Jan-19 06:06 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20190110_090457826-47601.jpg 10-Jan-19 06:06 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20190110_090433086-97AC1.jpg 10-Jan-19 06:07 AM beautiful! 10-Jan-19 06:07 AM too bad it's in ruins now 10-Jan-19 06:07 AM Van De Graf accelerator, 1937, at abandoned Westinghouse plant. 10-Jan-19 06:07 AM I guess maybe the big bulb on the roof is the top of the column. Does the beam come back down the middle? 10-Jan-19 06:10 AM yep 10-Jan-19 06:10 AM https://upload.wikimedia.org/wikipedia/commons/b/bd/Westinghouse_Van_de_Graaff_atom_smasher_-_cutaway.png 10-Jan-19 06:16 AM Cool. Why does it need those (relatively small) insulators on the outside shell? I see they used compressed air to increase breakdown voltage. 10-Jan-19 06:17 AM good question, maybe corona suppression? 10-Jan-19 10:35 AM Do you mean the rings around the tube? 10-Jan-19 10:35 AM Wait nvm just saw the small insulators now 10-Jan-19 10:40 AM I would guess that the ladder was made of wood, since it doesn't appear to have any insulation. 10-Jan-19 10:40 AM pointing useless things 10-Jan-19 06:32 PM I was supposed to let it be until sunday...but I have ended doing the whole first revision of the pcb. XDDDDDDDDDD ...and ended up ordering 3 at oshpark. (1.9$ with free shipping...just sneezed and when I opened my eyes I had already ordered them. XDDDD) (and a polimide stencil for 12$...dammit...) 10-Jan-19 06:32 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/4f0ad846-d5ae-4242-9da4-98a29fd81a61-D9530.png 11-Jan-19 06:46 AM Question: The dots in the transformer indicate polarity (voltages in phase). I have grounded them in "phase", and used the dot as "positive".If I had them inverted, would that out of phase, coupled with the common grounding, prevent the circuit from firing? (my guess is that it would not work). 11-Jan-19 10:21 AM Got a schematic? 11-Jan-19 10:50 AM yeap 11-Jan-19 10:50 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/22b70560-d434-4a36-a85c-329e577fecad-F5F4A.png 11-Jan-19 11:18 AM moin 11-Jan-19 11:36 AM PTT? some radio interface? 11-Jan-19 11:36 AM That looks like a TX only digimode interface. 11-Jan-19 12:03 PM push to talk 11-Jan-19 12:15 PM Radio interface, yeah. 11-Jan-19 01:48 PM Qualia just posted this on twitter...OMG... @GigaSquirrel remember we talked about building a vacuum chamber out of plates like a football?... 11-Jan-19 01:48 PM https://pbs.twimg.com/media/DwqGSoxUwAA9FWl.jpg:large 11-Jan-19 01:49 PM don't worry, I've already got the pic open and am drooling onto my new neutron detector 11-Jan-19 01:49 PM At some point in the future, when I have a CNC plasma cutter, I'm going to build that (or something totally looking alike) 11-Jan-19 01:49 PM That is truly pr0n... 11-Jan-19 01:50 PM ohhh yes 11-Jan-19 01:52 PM I need a higher resolution version of that...for reasons. 11-Jan-19 01:52 PM @Applied_Ion can you shed some light on my transformer doubt? 11-Jan-19 02:09 PM @N.Tech #8587 yooooo 11-Jan-19 02:09 PM hm whppsy 11-Jan-19 02:18 PM ? 11-Jan-19 02:18 PM bahahaha 11-Jan-19 04:26 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_8360_cr-98567.png 11-Jan-19 04:26 PM A different view. 11-Jan-19 04:26 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/unknown-889CC.png 11-Jan-19 04:26 PM and another one. 11-Jan-19 04:41 PM drool can't imagine what the windows cost 11-Jan-19 04:41 PM Depends on the material I guess. 11-Jan-19 04:41 PM I will make mine from borosilicate, should be affordable. 11-Jan-19 04:41 PM YEAH. A 100mm*10mm thick borosilicate window costs 10€ 11-Jan-19 04:41 PM I can afford that. 11-Jan-19 04:41 PM Times 12, I mean 11-Jan-19 04:41 PM DAMMT 11-Jan-19 04:41 PM I need a plasma CNC router. 11-Jan-19 04:41 PM like...NOW. 11-Jan-19 04:48 PM LOL 11-Jan-19 04:48 PM lol 11-Jan-19 04:48 PM That's probably one thing I could make that gantry I have into... But would be a pretty bad way to use such beautiful hardware. 11-Jan-19 04:52 PM Yeah. Plasma cutters are messy anyways. 11-Jan-19 04:52 PM and sparky. 11-Jan-19 04:52 PM @GigaSquirrel don't you want to buy one chamber like that from me? 11-Jan-19 04:54 PM you want them to pay you so you can get a plasma cutter table and make it for them so you can make your own don't you >.> 11-Jan-19 04:55 PM You doubt that?...besides, then everyone has access to a plasma cutter then. 11-Jan-19 04:57 PM a plasma table can be made relatively cheaply, the only annoying thing is getting the THC working on uneven material 11-Jan-19 04:58 PM Then just use even material (XDDDDDDDDDD) 11-Jan-19 04:58 PM Yeah. There are controllers that measure current and adjust height. 11-Jan-19 04:58 PM but a good powersupply and torch seems to really improve the cut for whatever reason 11-Jan-19 04:58 PM no, they measure voltage 11-Jan-19 04:58 PM ah, okay! 11-Jan-19 04:58 PM I would rather measure tip distance with a laser or something like that. 11-Jan-19 04:59 PM no 11-Jan-19 04:59 PM too complicated and unnecessary 11-Jan-19 04:59 PM ?? 11-Jan-19 04:59 PM the voltage is directly proportional to the distance of the electrodes 11-Jan-19 04:59 PM But measuring it is a pain in the butt. 11-Jan-19 04:59 PM (within reason) 11-Jan-19 04:59 PM no 11-Jan-19 04:59 PM less so than trying to get a laser to measure at the point of the nozzle 11-Jan-19 04:59 PM there are a few designs out there, look at the mesa one. it works ok 11-Jan-19 05:01 PM no need to measure at the point of the nozzle, just near enough, actually. If the metal is so bent that 2/3cm away the diference is too much, then you should not be cutting that in the first place. 11-Jan-19 05:01 PM nah, there are lots off application where that matters 11-Jan-19 05:01 PM and it makes the machine less error prone 11-Jan-19 05:02 PM Okay? I just freehand cut now with my plasma cutter, so I know nothing. 11-Jan-19 05:03 PM well, the problem is that if you are too far away the cut quality sucks and the arc will extinguish 11-Jan-19 05:03 PM which will crash your machine and likely break off your ceramic 11-Jan-19 05:03 PM when you can just measure the arc voltage and it works™ 11-Jan-19 05:06 PM Yeah, thinking about it, I would use a ceramic slip ring and slide that around. if the material is supported enough, it should not give much problems, as dross is below that. 11-Jan-19 05:06 PM I do get the point of voltage sensing, but not my cup of tea. 11-Jan-19 05:06 PM I also prefer to drag the tip through the metal to get the best cut at the expense of tips, in any case. 11-Jan-19 05:10 PM it's just not gonna work well without thc, you can try other ways, but implementing it is relatively easy 11-Jan-19 05:11 PM I disagree. I hate programming, and software. to me it overcomplicates things in a way that I don't know how to do. 11-Jan-19 05:11 PM so it's easier for me to it the other way around. 11-Jan-19 05:13 PM try cutting a piece of metal that bends upwards due the the heat of cutting then 11-Jan-19 05:13 PM if you need to clamp down your stock you loose a huge benefit of a plasma table 11-Jan-19 05:13 PM and clamping internal features is not practical at all 11-Jan-19 05:13 PM and then you have the clamps in your way all the time 11-Jan-19 05:15 PM I understand your point. But I'm the kind of person that always 3D prints with raft and supports. 11-Jan-19 05:15 PM If making it slow gives me the piece without complicating my machine, that's ok for me. 11-Jan-19 05:15 PM It's a hobby, I don't have to justify time losses. XD 11-Jan-19 05:16 PM that's also an issue of plasma cutting, your process window is pretty small 11-Jan-19 05:16 PM What do you mean? 11-Jan-19 05:17 PM if you go too fast or too slow it just doesn't work 11-Jan-19 05:17 PM ah, yeah, Kinda learned that the hard way. 11-Jan-19 05:17 PM and the window where it works is called the process window 11-Jan-19 05:17 PM yes, yes, now I understood you. 11-Jan-19 05:18 PM so you are kinda stuck at going relatively fast 11-Jan-19 05:18 PM I got the feeling of that with my crappy laser, when cutting wood. 11-Jan-19 05:18 PM my supports suck, so I have learnt to start, stop, move supports, start. Not exactly the same issues as plasma, but similar enough. 11-Jan-19 05:18 PM especially when cutting very thin strips of acrylic that bend upwards. XD 11-Jan-19 05:18 PM I'll rememer when I get to have a CNC plasma. ^^ 11-Jan-19 05:18 PM bedtime! 11-Jan-19 05:30 PM Sorry @Nixie what issue were you having with the transformer? Also what is this chamber setup from? A lab or someone's personal system? 11-Jan-19 05:35 PM Haha, don't worry! 11-Jan-19 05:35 PM Let me copypaste the text 11-Jan-19 05:35 PM Question: The dots in the transformer indicate polarity (voltages in phase). I have grounded them in "phase", and used the dot as "positive".If I had them inverted, would that out of phase, coupled with the common grounding, prevent the circuit from firing? (my guess is that it would not work). 11-Jan-19 05:35 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/4f0ad846-d5ae-4242-9da4-98a29fd81a61-8DC71.png 11-Jan-19 05:35 PM Schmatic: 11-Jan-19 05:35 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG-20190111-WA0008-CB6C1.jpg 11-Jan-19 05:39 PM So is this schematic your goal, or the current pcb? Also what's the application? 11-Jan-19 05:47 PM I can't explain the aplication, sorry. The doubt is about the coils of the transformer being in phase and out of phase, when having a common gnd connection. 11-Jan-19 05:47 PM Schematic is pcb, and working prototype 11-Jan-19 05:47 PM So, my hipotesis is that, if you connect both coils so that input and output voltage are out of phase, it wont work as well as if they are on phase. 11-Jan-19 05:47 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/Transformer-Polairty-Markings-1024x436-2650F.gif 11-Jan-19 05:47 PM So, if you make H2 and X2 the common ground, it will work fine, but if you happen to ignore the phasing of the transformer and make a common ground between H2 and X1, it won't work properly. 11-Jan-19 05:53 PM What signal is being sent through it? AC, square pulse? 11-Jan-19 05:53 PM Ac, audio signal, 200mV pp 11-Jan-19 05:54 PM Wouldn't it just invert the output signal then? 11-Jan-19 05:54 PM If I am not explaining clear enough or it is messy, feel free to send me on my way 11-Jan-19 05:54 PM Yea, it would, but with a common ground, won't the secondary voltage just mess up back into the circuit? 11-Jan-19 05:54 PM Lets say R is negative. Output is positive, but thst voltage might get reduced because now gnd is at midpoint between tjst positive voltage and the negative R 11-Jan-19 05:54 PM Or reduced current because it seeps down into the circuit up into R. 11-Jan-19 05:54 PM When R is positive, the diode is reverse polarized and nothing happens. 11-Jan-19 05:54 PM Its not very critical, in any case, I made the two possibilities boards to test it out. 11-Jan-19 05:54 PM XD 11-Jan-19 06:00 PM Since it's ac, wouldn't it just oscillate from positive to negative anyway (assuming oscillation around 0v), so it would still work the same regardless of phasing? 11-Jan-19 06:00 PM I don't really know 11-Jan-19 06:00 PM But as said, made the two boards so.we can test it later. I just wondered if the high voltage guys might have an insight. 11-Jan-19 06:00 PM Thanks anyways! 11-Jan-19 06:04 PM I think it shouldn't make a difference, if I am understanding what you are doing correctly. Testing is always the best answer! 11-Jan-19 06:04 PM So what exactly was that other plasma chamber? That's not a secret setup of yours is it? 11-Jan-19 06:24 PM @Nixie The transformer portion of the circuit looks reasonable. You are correct about the "phase polarity" of the transformer. Usually the marks indicate the beginning of a clockwise wrap of the internal wire. In your circuit, the series connection of the secondary coils as shown won't cancel each other out, but will increase the output. What is the transformer turn ratio from primary to secondary? Is that some sort of FET transistor used to switch the PTT to ground? 11-Jan-19 07:22 PM 1:15 Yes it is a vety badly drawn fet with low gate voltage. The diode is schotkki. 11-Jan-19 07:22 PM Glad to hear I sort of got it right. 11-Jan-19 07:22 PM I will directly assemble the one wich has the coils in phase, then. 11-Jan-19 07:22 PM 11-Jan-19 07:22 PM @Applied_Ion the plasma chamber is an image that Qualia posted on twitter. Apart from looking amazing, on one of the voicechats, gigabequerel and I discussed the possibility of making bigger vacuum chambers through welding of flat surfaces in a spheroidal shape. That one is probably made from a single Al. piece, but if welded correctly and with big enough holes, I don't see why wouldn't it be feasible to hand weld it. 11-Jan-19 09:28 PM @Nixie What's the transformer's primary to secondary turns ratio? 12-Jan-19 02:14 AM The transformer ratio is 1:15 (posted it before but just the numbers, not clear enough, sorry ) 12-Jan-19 05:41 AM Well, I did some simulations (don't get angry, @Applied_Ion , I know EWB5 is not the best tool for that) and it showed no real difference between the outputs being in sync and out of sync. It showed that the voltage output is more than enough to reliably switch the fet. 12-Jan-19 05:41 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/out_of_sync_out_voltage-6A8DD.jpg 12-Jan-19 05:41 AM Also, there was no simulated current flow between the outputs (sync and no sync) of the transformer. 12-Jan-19 09:19 AM I'm curious. So the FET will be driving the push-to-talk input. Will the external PPT circuit latch for a predefined period when it sees the FET switch, even from a relatively short pulse? 12-Jan-19 10:24 AM With a big enough resistor in the fet, it will actually mantain the ptt to ground until there is no more audio coming in. 14-Jan-19 06:50 PM @Nixie oh another cool thing about that dodecahedral vacuum chamber 14-Jan-19 06:50 PM iirc, all of the windows are ITO-sputtered on both sides 14-Jan-19 06:50 PM so it's conductive all throughout the inside and i want to say i remember a paper talking about capacitively coupling signals through those viewports 14-Jan-19 06:50 PM my brief dive into dusty plasmas and self-organization thereof in microgravity conditions (i.e. plasma crystals) kinda puttered out after looking at vomit comet and soyuz experiment-launch prices, but if i ever get a chance to drop a vacuum chamber down a drop tower with some fast instrumentation.. 14-Jan-19 06:54 PM XDDD 14-Jan-19 06:54 PM Interesting! 14-Jan-19 06:54 PM Like, I only want to build it because its amazingly pretty 14-Jan-19 06:54 PM ikr? 14-Jan-19 06:54 PM and to use it to a lesser extent. 14-Jan-19 06:54 PM XDDD 14-Jan-19 06:54 PM ikr? 14-Jan-19 06:54 PM but of course 14-Jan-19 06:54 PM 'i know, right?' 14-Jan-19 06:54 PM i know the fusor kids love their spherical vacuum chambers but that thing is Next Level 14-Jan-19 06:56 PM Is the inside totally sperhical? 14-Jan-19 06:56 PM Like, mine will be made of flats welded together. 14-Jan-19 06:57 PM no, i don't think so. i think the inside has these raised platforms extending out from the inner faces 14-Jan-19 06:57 PM i never did find any like, really in-depth papers on how that thing is put together 14-Jan-19 06:57 PM but it's pretty.. :3 14-Jan-19 06:59 PM Totally pretty 14-Jan-19 06:59 PM We joked with Gf about making a lamp from one, but like, making it glow with plasma. 14-Jan-19 07:00 PM :D 14-Jan-19 07:00 PM totally innefective as lamp, nor as mood light...but hey, plasma! 14-Jan-19 07:00 PM BTW, welcome, long time no see. 14-Jan-19 07:00 PM (super snoring gf sent me to the computer) 14-Jan-19 07:01 PM i'd really really like to learn enough glassblowing to be able to make, like, fusor lightbulbs 14-Jan-19 07:01 PM put a little boost converter to get a couple kV in there.. 14-Jan-19 07:01 PM fusor lightbulbs? what is that? 14-Jan-19 07:01 PM it'd probably sputter itself to death in no time at all but i like the idea 14-Jan-19 07:01 PM oh like, a farnsworth hirsch fusor type thing, but.. in a clear glass envelope, like a lightbulb 14-Jan-19 07:01 PM basically a neon bulb but with interesting electrode design 14-Jan-19 07:02 PM Ahh 14-Jan-19 07:02 PM You don't need glassblowing for that 14-Jan-19 07:03 PM not a high enough voltage to actually emit x-rays, but enough to make a pretty glowy star-in-a-jar 14-Jan-19 07:03 PM oh certainly 14-Jan-19 07:03 PM unless you want a fancy shape, of course. 14-Jan-19 07:04 PM also hi, yeah! it's been a while 14-Jan-19 07:04 PM i'm slowly readjusting to post-holiday life, trying to get back into the swing of things.. 14-Jan-19 07:04 PM spent a while bludgeoning a NIM power supply over the head a bit, in hopes of having a stable HVDC power supply with a good amount of current to drive a bunch of sensitive detectors off 14-Jan-19 07:04 PM just my luck, though, i wager it needs at least a couple capacitors replaced 14-Jan-19 07:07 PM Saw some photos on twitter 14-Jan-19 07:07 PM Looks rad, tho 15-Jan-19 03:09 AM hehe, rad 15-Jan-19 04:47 AM Bqhah 15-Jan-19 08:22 AM time for beer 15-Jan-19 08:27 AM prost! 15-Jan-19 08:29 AM zum wohl! 15-Jan-19 11:57 PM Has anyone made these into discord emoji yet 15-Jan-19 11:57 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20180430_182808-024DC.jpg 15-Jan-19 11:57 PM That's a great idea 15-Jan-19 11:57 PM I don't know if any of us have pro 16-Jan-19 06:32 AM @Pan Da so, any motorbiker friends? 16-Jan-19 06:33 AM i can't wait for march, when the season starts for me XD 16-Jan-19 06:34 AM Should you be @GigaSquirrel I would be mocking you, but you are not. 16-Jan-19 06:34 AM XDDD 16-Jan-19 06:34 AM just go ahead, he can take it 16-Jan-19 06:34 AM Yeah, but he doesn't deserve it 16-Jan-19 06:34 AM unlike you. 16-Jan-19 06:34 AM XDDD 16-Jan-19 06:34 AM do you have a bluetooth headset? 16-Jan-19 06:34 AM for the motorbike, I mean 16-Jan-19 06:35 AM nope 16-Jan-19 06:36 AM Oh well. 16-Jan-19 06:36 AM I am developing an app that allows to route a bluetooth headset through the jack, so you can talk wirelessly with a passenger just using normal earphones (for the passenger) 16-Jan-19 06:37 AM sorry XD 16-Jan-19 06:37 AM and also the electronics for connecting the phone to a walkie talkie for group talks 16-Jan-19 06:37 AM (important note, battery-LESS electronics, unlike the avaliable options right now) 16-Jan-19 06:37 AM When it is ready can I ask you to forward it to other motorbikers? 16-Jan-19 06:40 AM good luck adapting the app to his phone 16-Jan-19 06:40 AM exactly that. but yeah, i can spread it to the few other bikers i know ^^ 16-Jan-19 06:42 AM Thanks! ^^ 16-Jan-19 06:42 AM what's up with his phone? 16-Jan-19 06:42 AM iOS? 16-Jan-19 06:42 AM (only android, btw, android 6 minimum) 16-Jan-19 06:42 AM haha, close 16-Jan-19 06:43 AM pre-symbian sth? XD 16-Jan-19 06:44 AM ?? 16-Jan-19 06:44 AM pre-everything 16-Jan-19 06:44 AM it's an old nokia brick 16-Jan-19 06:46 AM Mkay, no app for you ^^U 16-Jan-19 06:46 AM In any case it's not that I plan to make much money with it anyways. (will cost 99cts) so it's not like I have money to advertise it. ^^U 16-Jan-19 06:46 AM In my head it has an amazing value, should I have found it on the app store, I would have paid up to 10€ for it. Like...I need it! (in the end I had to find someone to program it for me, in exchange for mechanical fabrication ^^U 16-Jan-19 02:11 PM https://twitter.com/TCurrentSource/status/1085282528016125952?s=19 16-Jan-19 02:12 PM cute! 16-Jan-19 02:13 PM awwwwwwwwwwwwwwwwwwww _ 16-Jan-19 02:13 PM Yeah i want one 16-Jan-19 02:13 PM ...well thank you discord x.x 16-Jan-19 02:20 PM Me too, however I only foresee adam having.possibilities of actually getting one 16-Jan-19 02:20 PM let's just ask pfeiffer? 16-Jan-19 02:20 PM I shall make one with rotating blades. 16-Jan-19 02:21 PM like those small USB fans 16-Jan-19 02:21 PM In ya face,.pfeifer! 16-Jan-19 02:21 PM only at 150 k rpm 16-Jan-19 02:21 PM @Nixie 5V-powered with a bldc and at least e-4mbar of final vacuum? 16-Jan-19 02:21 PM The tescan SEMs have an environmental secondary electron detector that differentially pumps the phosphor, it has the smallest turbo I have ever seen on it 16-Jan-19 02:22 PM How small? 16-Jan-19 02:22 PM I want one...for reasons 16-Jan-19 02:22 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/LVSTD-C6DCF.png 16-Jan-19 02:22 PM @Pan Da keep dreaming 16-Jan-19 02:22 PM The turbo is the block on the right 16-Jan-19 02:23 PM Can ypu give some sense of scale? 16-Jan-19 02:23 PM working on it 16-Jan-19 02:24 PM activates adam's turbo button 16-Jan-19 02:24 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/3_txKlSed2i7ubO5GeV-ZEtv0LXsbbIKSWmb1uqPb9-6C199.png 16-Jan-19 02:24 PM aw goodness that's cute 16-Jan-19 02:25 PM Two fists size (one on top of the other) 16-Jan-19 02:25 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/1B3JWCMgG1GDe21WAru2BkWs6YuXRtsZ177pgFgj7V-A4982.png 16-Jan-19 02:25 PM Yeah, thats small 16-Jan-19 02:25 PM But thats unobtainium 16-Jan-19 02:26 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/unknown-B4F54.png 16-Jan-19 02:26 PM zoom enhance 16-Jan-19 02:26 PM reminds me of that demo turbo pump stand on electronica (i think) 3 years ago... miniature turbo and membrane pump and a battery supply on a helium balloon drifting around 16-Jan-19 02:26 PM Its adorable 16-Jan-19 02:26 PM Where is the foreline? 16-Jan-19 02:26 PM I know a smaller one exists but I wasnt allowed to take photos of it... 16-Jan-19 02:27 PM "NDAdam" 16-Jan-19 02:27 PM 16-Jan-19 02:28 PM Check this out https://newatlas.com/darpa-mems-smallest-vacuum-pumps/27883/ 16-Jan-19 02:28 PM Ionic pump? 16-Jan-19 02:28 PM Electrostatic, i mean 16-Jan-19 02:28 PM what. 16-Jan-19 02:29 PM The mit one yeah 16-Jan-19 02:29 PM Some of them are mechanical 16-Jan-19 02:29 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/Pfeiffer_HiPace10_PMP03960A_1-ED649.png 16-Jan-19 02:29 PM Here we go 16-Jan-19 02:29 PM https://www.pfeiffer-vacuum.com/en/products/vacuum-generation/turbopumps/hybrid-bearing/hipace-10/?detailPdoId=4518 16-Jan-19 02:29 PM 10 l/s nitrogen 16-Jan-19 03:39 PM yeah they are cute but not extremely useful for general applications 16-Jan-19 03:39 PM I know a few very cool projects that use them 16-Jan-19 03:40 PM handheld MS anyone? XD 16-Jan-19 03:40 PM Yeah stuff like that but... Electron beams 16-Jan-19 03:43 PM we used a prototype of them for a very low power/small formfactor MS to be used in hospitals 16-Jan-19 03:54 PM What was the need for it to be so small? 16-Jan-19 04:05 PM it needs to fit below a regular patient monitor 16-Jan-19 04:05 PM the idea is to suck the exhaled air off the nasal prongs and look for certain markers 16-Jan-19 04:07 PM Oh thats cool 16-Jan-19 04:07 PM Thats a tiny ms 16-Jan-19 04:08 PM the ms part is working fine 16-Jan-19 04:09 PM Well thats good 16-Jan-19 04:09 PM and is quite small, but the vacuum system is too expensive or large 16-Jan-19 04:09 PM Thats a hard one. Whats your target bom for vacuum? 16-Jan-19 04:10 PM there is no target anymore, the idea is not marketable currently 16-Jan-19 04:11 PM Thats to bad 16-Jan-19 04:11 PM It sound like cool tech 16-Jan-19 04:11 PM but it needs to be <5-10k in parts 16-Jan-19 04:11 PM otherwise you cannot make a profit 16-Jan-19 04:11 PM the MS is pretty neat, it works at very high pressures with almost no loss of sensitivity 16-Jan-19 04:11 PM one would only need 10^-4-5 mbar to detect ppb changes in the gas going in 16-Jan-19 04:11 PM which is almost in the realm of just using a triple stage rotary vane, but then you need a solution for the exhaust 16-Jan-19 04:13 PM So diaphragm+turbo? 16-Jan-19 04:14 PM yes, but that is too expensive 16-Jan-19 04:14 PM IGP? 16-Jan-19 04:14 PM Cheap modules that get swapped in or something? 16-Jan-19 04:15 PM the gas volume is too high for those 16-Jan-19 04:15 PM That what I was thinking 16-Jan-19 04:15 PM That small of a igp you are only at 20 l/s or so 16-Jan-19 04:15 PM a custom low stage count turbo would be ideal 16-Jan-19 04:15 PM just to get you over the edge 16-Jan-19 04:16 PM but eh, you can't really make a profit then 16-Jan-19 04:16 PM but you can do neat stuff, like detect if a patient will get a diabetic shock or seizures by looking at the acetone content of the exhaled air 16-Jan-19 04:22 PM To bad that vacuum is just to expensive 16-Jan-19 04:25 PM I've noticed that most of the stuff on this channel is about vacuum. Just sayin' 16-Jan-19 04:30 PM this is the only server and group I know of where off-topic discussions derail and become on-topic :-D 16-Jan-19 09:04 PM So just to be clear a USB drive failing and then getting really hot is bad yeah? 16-Jan-19 09:32 PM uhhh 16-Jan-19 09:32 PM it failing is bad 16-Jan-19 09:32 PM getting really hot is just... uh... what 16-Jan-19 09:32 PM most USB ports have like a 1A-2A limit... 16-Jan-19 09:32 PM so like 10W max 16-Jan-19 09:32 PM so if its getting really hot jeez... 16-Jan-19 09:32 PM I mean 10w in a small package... 16-Jan-19 09:33 PM sure, but ussually the USB port has a soft-fuse that blows and stops you from drawing over that limit 16-Jan-19 09:33 PM so it must be an interesting failure 16-Jan-19 09:33 PM but yea that's totally dead 16-Jan-19 09:33 PM Yeah the drive was being odd. I dont think it was a straight short 16-Jan-19 09:33 PM It was type 3 so possibly more current 16-Jan-19 09:34 PM oh yea for sure 16-Jan-19 09:34 PM could always open it up and see if there is anything obvious 16-Jan-19 09:34 PM but its probably just dead... 16-Jan-19 09:34 PM luckily, unless it was something nuts USB3 drives are so cheap now 16-Jan-19 09:35 PM It was a free conference drive. I was able to get it to run for a about 30 seconds at a time and got everything off 17-Jan-19 12:39 AM Possibly some regulator died and is working on gently frying things. 17-Jan-19 12:39 AM Have managed to have discrete regulators desolder themselves that way. Saved me the trouble of removing it myself 17-Jan-19 07:47 AM moin 17-Jan-19 08:09 AM moin! 17-Jan-19 08:10 AM ja moin 17-Jan-19 08:14 AM has anyone ever tried using feedthrough capacitors for vacuum feedthrough? 17-Jan-19 08:14 AM https://de.aliexpress.com/item/Emi-filter-capacitor-feedthrough-capacitors-series-M6-1000PF-100VDC-10A-102-M6X1-0/1542607214.html 17-Jan-19 08:14 AM yep 17-Jan-19 08:14 AM works fine 17-Jan-19 09:27 AM Interesting! 17-Jan-19 09:27 AM Morning, btw! 17-Jan-19 09:27 AM Also, I opened a tindie store. (no products yet) 17-Jan-19 09:27 AM https://www.tindie.com/stores/ElectronicMercenary/ 17-Jan-19 09:57 AM now the millions will start flowing! 17-Jan-19 10:09 AM of bits, yeah, sure. 17-Jan-19 11:24 AM any must-haves from digikey to get to 50€ in total? 17-Jan-19 11:24 AM well, I need something for 27€ 17-Jan-19 11:28 AM A ruller? 17-Jan-19 11:28 AM The digi key rullers are cool 17-Jan-19 11:28 AM yeah 17-Jan-19 11:28 AM ah, damn it, I meant mouser 17-Jan-19 11:28 AM Hm 17-Jan-19 11:28 AM Something with a kv rating 17-Jan-19 11:29 AM like 100 3.5 kV resistors? 17-Jan-19 11:29 AM I'd love one of those 125 kV 60W resistors as a load for my fusor, but they're 150€... 17-Jan-19 11:31 AM Yeah the big resistor after the supply helps a lot 17-Jan-19 11:31 AM yep 17-Jan-19 11:31 AM All that fun sputtering and what not 17-Jan-19 11:32 AM oh, and I need a better supply, but mouser won't have that ^^ 17-Jan-19 11:33 AM But they might have a bunch of caps and dioeds 17-Jan-19 11:35 AM hmmm 17-Jan-19 11:36 AM oh, good point - i need a resistor of 600k that can burn 3kW - but how? XD 17-Jan-19 11:36 AM and isolate 40 kV 17-Jan-19 11:38 AM Oil 17-Jan-19 11:42 AM oil? oil-cooled something or just oil as a resistor? 17-Jan-19 11:42 AM Oil cooled 17-Jan-19 11:42 AM It's an option 17-Jan-19 11:44 AM yeah, of course. but i don't even know what to use as a resistor that won't cost an arm and a leg 17-Jan-19 11:44 AM it will most likely be oil-insulated anyways, don't want to risk anything at 40kV 17-Jan-19 12:15 PM water might be a good option if you just want to load something for testing 17-Jan-19 12:15 PM it's for discharging a capacitor 17-Jan-19 12:15 PM don't know how water works with DC... 17-Jan-19 12:18 PM @Pan Da a huge waterbath with a pinch of salt with a few cm plastic standoff? 17-Jan-19 12:18 PM well, I guess some ceramic tube resistors will work fine 17-Jan-19 12:18 PM if you are not constantly dissipating 3kW you can just get smaller ones 17-Jan-19 12:18 PM @GigaSquirrel let's use Mr. Nernsts invention... :-D 17-Jan-19 12:19 PM if we want to dump it just torch the crystal? 17-Jan-19 12:23 PM @Koelzer well.. yeah, but 50kJ in water might lead to unwanted side effects... like... boiling water and some oxygen and hydrogen... 17-Jan-19 12:27 PM not really 17-Jan-19 12:27 PM if you had only 1kg of water it would heat up less than 10K 17-Jan-19 12:30 PM huh. physics, yeah! but what about electrolysis? i can't remember how to estimate what could happen there... and i REALLY don't want to "just try it out" on those monster caps :-D 17-Jan-19 12:32 PM reminds me of the scariac 17-Jan-19 12:32 PM just type it into youtube 17-Jan-19 12:32 PM https://www.youtube.com/watch?v=P9UjxG8sN1c 17-Jan-19 12:33 PM https://giphy.com/gifs/reactionseditor-3o7btT1T9qpQZWhNlK 17-Jan-19 12:34 PM at 7:48 he also sees the effect of (un)loaded resistive divider 17-Jan-19 12:34 PM but much fun! 17-Jan-19 12:36 PM yeah, it would be fun, but we're currently looking for a boring discharge 17-Jan-19 12:36 PM the worst thing that can happen is that something explodes, which should be expected tho 17-Jan-19 12:36 PM I once had a hot stick explode at me, that was fun 17-Jan-19 12:37 PM but we're trying to minimize the chance of something exploding 17-Jan-19 12:37 PM we are currently trying to build a no-casualties scenario 17-Jan-19 12:37 PM just let me do it 17-Jan-19 12:37 PM ehh, maybe not no casualties, but maybe alara 17-Jan-19 12:42 PM those wirewound ceramic resistors are actually not too expensive, til 17-Jan-19 12:48 PM which ones? 17-Jan-19 12:49 PM those ones! 17-Jan-19 01:12 PM I remember seeing mikeselectricstuff making a high power disipation with insulated copper cable and water. 17-Jan-19 01:14 PM https://www.youtube.com/watch?v=WECW88rJYrE 17-Jan-19 01:14 PM https://youtu.be/WECW88rJYrE 17-Jan-19 01:14 PM Bahahah, yeah 17-Jan-19 01:15 PM yeah, i totally just found that one and am wathing it right now 17-Jan-19 01:15 PM but i guess that's neither high resistance nor high voltage :-( 17-Jan-19 01:15 PM Hmm...for high voltage use oil 17-Jan-19 01:15 PM And for high resistance use more wire 17-Jan-19 01:16 PM yeah, but a few 100km of copper wire? XD 17-Jan-19 01:16 PM Or thinner wire? 17-Jan-19 01:16 PM Or a different kind of wire 17-Jan-19 01:16 PM Buy nichrom 17-Jan-19 01:16 PM Its not that expensive 17-Jan-19 01:17 PM yeah, that's the next point, calculating through that 17-Jan-19 01:17 PM Go, go, go! 17-Jan-19 01:17 PM highfives @GigaSquirrel for the double-link o/ 17-Jan-19 01:18 PM o/ 17-Jan-19 01:18 PM (should be \o but its okay.) 17-Jan-19 01:19 PM but that's illegal in germany 17-Jan-19 01:20 PM Bahaahah 17-Jan-19 01:24 PM hmh. resistance wire... 0,1mm is much too thick :-( 17-Jan-19 01:24 PM buerklin doesn't go smaller, let's check mouser... 17-Jan-19 02:09 PM Haha, I dunno why you need a scariac when you can get real variacs pretty easily 17-Jan-19 02:10 PM me too 17-Jan-19 02:11 PM hrm I can't seem to find the photo of my big variac 17-Jan-19 02:12 PM 3 phase variac as big as a small adult? 17-Jan-19 02:12 PM I have some small desktop ones but I also have a big one that does 120-240 and can even boost 120 to 240 I think? if you wire it up right 17-Jan-19 02:12 PM ahah unfortunately not 3 phase 17-Jan-19 02:12 PM only single phase 17-Jan-19 02:12 PM but I don't know what I'd need a 3 phase one for.. since I don't have 3 phase servce... 17-Jan-19 02:12 PM maybe someday... 17-Jan-19 02:12 PM I would love to start a hackerspace here in the poughkeepsie area I have the contacts, the ability, etc... 17-Jan-19 02:12 PM but I don't know enough people that would want to help start it in the area 17-Jan-19 02:12 PM would need at-least a small group to start 17-Jan-19 02:12 PM even if it was only like 3 people 17-Jan-19 02:27 PM hm yeah, not sure. I think I would prefer some good friends with a shared workshop. but running a hackerspace? hm, not so much convinced when doing so much High Vacuum/Voltage stuff, which really no one else should touch 17-Jan-19 02:27 PM and normally you have to be a large part of your free time present 17-Jan-19 02:27 PM so kinda only one of them would work for me 17-Jan-19 02:28 PM yeah, the legal stuff and insurance is going to be a [censored by bot] for stuff like that 17-Jan-19 02:28 PM he's american, so not needed hahahaha 17-Jan-19 02:28 PM sorry 17-Jan-19 02:29 PM not needed but he'll be raided by homeland security at some point 17-Jan-19 03:13 PM We all would be homeland security targets 17-Jan-19 03:13 PM Also yeah, better to have a shared workshop, rather than a hackerspace. 17-Jan-19 03:13 PM I could kickstart one in my city just with my workshop but: A: not gonna allow a bunch of strangers to touch my tools. B: level here is pretty low, I would become a nanny for everyone, and that's a no-no/personal project killer. C: not gonna allow a bunch of strangers to touch my tools. 17-Jan-19 03:21 PM @GigaSquirrel again I have the resources... I know people who run hackerspaces and have all the legal stuff written up already its just starting a non-profit/etc 17-Jan-19 03:21 PM wow that wasn't deleted oops 17-Jan-19 03:21 PM need to check that I guess haha 17-Jan-19 03:21 PM but yea... I have resources, tools, I know people, I have contacts... 17-Jan-19 03:21 PM Its really just making sure you have the momentum afterwards 17-Jan-19 03:22 PM @Nixie as long as we are allowed to touch your tool(s|daddy) 17-Jan-19 03:22 PM but I am also very happy to have a shared space between friends :) 17-Jan-19 03:22 PM There's an old missle site in Maine for sale with a large enough barracks for a few people.... Anyone in? :) 17-Jan-19 03:22 PM I have been looking into non-profit stuff for a few years too, and know people going through the process themselves for their museums... 17-Jan-19 03:22 PM Since well I want to start a museum someday... I do have more computers than any one human should :P 17-Jan-19 03:22 PM https://twitter.com/kenshirriff/status/1086004653983068160 17-Jan-19 03:22 PM Neat! 17-Jan-19 03:36 PM Nice, but wich one is the symbol? (No kidding) 17-Jan-19 03:36 PM @Pan Da I said strangers. 17-Jan-19 03:36 PM the M 17-Jan-19 03:37 PM AH! 17-Jan-19 03:37 PM Bottom right corner! Thanks! 17-Jan-19 03:37 PM I would be in into a missile silo, @Conmega , just a bit too far. 17-Jan-19 03:37 PM I guess you are much more social 17-Jan-19 04:11 PM hm? I am pretty sociable probably because of the conferences I went to with my parents 17-Jan-19 04:11 PM @Nixie YAY! 17-Jan-19 04:11 PM But I get along best with likeminded nerds :) 17-Jan-19 04:11 PM Hmm I wonder how hard it would be to manufacture my own small RIE like those micro-RIEs 17-Jan-19 04:26 PM A rf sputtering machine + very good gas control? 17-Jan-19 04:26 PM @Applied_Ion might give us some insight. 17-Jan-19 04:26 PM @Pan Da just 1500km, go go go! 17-Jan-19 04:28 PM actually more like 2000 km 17-Jan-19 04:28 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/unknown-60960.png 17-Jan-19 04:28 PM Meh, just 500 more. My bike can do that with a single tank. 17-Jan-19 04:28 PM Prpduced in the basement? Who's one?? 17-Jan-19 04:29 PM sadly not mine 17-Jan-19 04:29 PM @Nixie if i can find a bike with sidecar, i will stuff @GigaSquirrel into it and make a biiig tour down to spain. 17-Jan-19 04:29 PM (cb500X, @Pan Da ) 17-Jan-19 04:29 PM Bajajaj, that would be awesome! 17-Jan-19 04:30 PM plz no sidecar 17-Jan-19 04:30 PM why not your bmw? 17-Jan-19 04:30 PM that one's at least got AC 17-Jan-19 04:30 PM Bmw bike? 17-Jan-19 04:30 PM no, car 17-Jan-19 04:30 PM i currently ride NC700. it's not beautiful, it's not a hot sportsbike, but it's super reliable and will get me literally everywhere 17-Jan-19 04:31 PM literally everywhere? let's colonize mars! 17-Jan-19 04:31 PM I dont judge bikes, dont worry. 17-Jan-19 04:31 PM @GigaSquirrel AC on bike is simple - too hot, drive faster, too cold, drive slower. 17-Jan-19 04:31 PM Bahahahahahhaha 17-Jan-19 04:32 PM ...or too cold - drive fast enough the friction warms you 17-Jan-19 04:32 PM Mine ots not a sportbike either, won't get into mars either, but I love it 17-Jan-19 04:32 PM Drove faster and heat is not a problem anymore 17-Jan-19 04:32 PM Next thing you know, you are delivering pizza to the ISS 17-Jan-19 04:33 PM but how are we going to transport a cap with a bike? 17-Jan-19 04:33 PM On the head? 17-Jan-19 04:33 PM Bohoho 17-Jan-19 04:33 PM @GigaSquirrel weld wheels under it and pull it? 17-Jan-19 04:33 PM Time to get a cargo bike 17-Jan-19 04:33 PM Or unlock you inner American and get a massive truck 17-Jan-19 04:34 PM rather a russian transport helicopter 17-Jan-19 04:34 PM hmm, I could lend a friends Ford F150... 17-Jan-19 04:34 PM We need a HV motor and run it.from tjose caps 17-Jan-19 04:34 PM Only an f150? 17-Jan-19 04:35 PM That's not very American of you, not having a truck twice as big as you need for surplus stuff 17-Jan-19 04:35 PM True, how's your inner metric european doing? 17-Jan-19 04:35 PM well, I don't even have a drivers license... 17-Jan-19 04:35 PM I only have @Pan Da 17-Jan-19 04:36 PM As long as ypu are a good co-pilot, should be fine 17-Jan-19 04:36 PM I'm DJ and Navigator 17-Jan-19 04:37 PM Tje spice must flow? 17-Jan-19 04:37 PM haha yeah, the f150 is small compared to some super dutys 17-Jan-19 04:37 PM and he's very good at DJing. not so much at navigating... 17-Jan-19 04:37 PM I think just in my close family we are up to 3 F350s and 2 big rams or something like that 17-Jan-19 04:37 PM its kinda excessive 17-Jan-19 04:38 PM (am I the only one constantly checking that I am in off-topic?) 17-Jan-19 04:38 PM and then the 2 150s... 17-Jan-19 04:38 PM 'murica. 17-Jan-19 04:38 PM Well, you two can come, caps or not, anytime. 17-Jan-19 04:38 PM We can set something on fire 17-Jan-19 04:39 PM I don't really get american trucks tho 17-Jan-19 04:40 PM @Nixie 'murcia! 17-Jan-19 04:40 PM they are building the same basic vehicle for decades 17-Jan-19 04:41 PM Okay, I have to concede that your pun is the best ever. 17-Jan-19 04:42 PM I've done even worse today, but sadly those don't translate well... 17-Jan-19 04:42 PM at least fuel is cheap, I was really confused that diesel is more expensive and not available at every station 17-Jan-19 04:42 PM Shame on you. 17-Jan-19 04:42 PM Really? (The diesel thingy) 17-Jan-19 04:42 PM I totally forgot tp check gas prices when I was in usa. 17-Jan-19 04:42 PM Just to compare. 17-Jan-19 04:47 PM yes, diesel is significantly more expensive than gas and you cannot get it everywhere 17-Jan-19 04:48 PM Interesting. 17-Jan-19 04:48 PM I don't much think about it, because electric motorbikes will take a looooong time to replace gas ones. But still. 17-Jan-19 04:49 PM i like the few diesel motorbikes there are 17-Jan-19 04:49 PM I prefer the rotary ones. 17-Jan-19 04:49 PM (still, I do want to make a turbogenerator electric one) 17-Jan-19 04:51 PM @Conmega if you are ever in the area, you should check out the Tech Valley Center of Gravity (TVCOG) in Troy. Quite large and very well equipped maker space, one of the most diverse I think in the US. I was a part of it for a long time, but with a tight budget for projects I stopped my membership this year 17-Jan-19 04:52 PM https://i.imgur.com/NKqYKCU.jpg is the issue of the rotary engine 17-Jan-19 04:52 PM They have a lot. Full metal working shop, wood shop, laser cutters, 3d printing, electronics, textile, etc. 17-Jan-19 04:54 PM Yeah, but are you going tomorrow or not? Thats the burning question. 17-Jan-19 04:55 PM Also on the RIE stuff, it looks pretty straightforward. I think @Nixie pretty much summed it up well. Practically a sputter machine with good gas control. Just replace the magnetron with a shower head style parallel plate electrode. 17-Jan-19 04:55 PM (more burning than apex seals) 17-Jan-19 04:55 PM Shouldn't be difficult 17-Jan-19 04:55 PM @Nixie https://www.youtube.com/watch?v=_f2S_xrAaqY 17-Jan-19 04:58 PM yeah the few diesel motorcycles are cool but none of them is really an acceptable replacement for a gasoline powered one 17-Jan-19 04:58 PM either they are based around some hatz single cylinder diesel or some lombardini three cyl shoved in there somehow 17-Jan-19 05:01 PM of course, but i like those oddities 17-Jan-19 05:02 PM @Conmega if you are really driven to start up a makerspace in your area, maybe try giving the TVCOG people a call on tips and how to start. I believe they got quite a decent grant from the state and some other sponsorships, they may be willing to help you out or give you information on how they did it. It started out as a small place in an area under a parking garage, and eventually moved to a really nice, larger building. For most of the time, it was purely volunteer driven. 17-Jan-19 05:02 PM Even if you know others in the area who make stuff, it doesn't hurt to start up a group and meet. Myself and a friend of mine started a small group that we meet once a month to discuss our projects and network. Kind of a group for serious experamentalists and makers working on advanced technologies at home with limited resources. It's a small group, but it's fun, and everyone learns sharing resources. I have given live demos of simple stuff, and will be giving demos of my accelerator and stuff when it's running, though not sure how long the group will last after this semester since most of the members are students and would be graduating. 17-Jan-19 05:07 PM snoring gf induced lack of sleep 17-Jan-19 05:07 PM @Pan Da mkay, interesting sound for sure, altough low rumbling engines are not my cup of tea. 17-Jan-19 05:07 PM I picked up my bike because people complained it was too silent. 17-Jan-19 05:11 PM @Nixie same with my NC700. and it's tiny... people always look quite surprised when i unfold at a red light and the bike suddenly looks like a pocketbike between my legs :-D 17-Jan-19 05:12 PM BAHAHAHAHHA, you know, I only tiptoe in mine! 17-Jan-19 05:12 PM Us both would be a sight to behold. 17-Jan-19 05:13 PM :-D 17-Jan-19 05:13 PM if you'd be my gimli, i'd be your legolas! (on bikes!) 17-Jan-19 05:13 PM wich version do you have? 17-Jan-19 05:13 PM It counts as ONE! 17-Jan-19 05:13 PM Gigabequereldriel... 17-Jan-19 05:13 PM Had to be said. 17-Jan-19 05:14 PM gnihihihihihihi 17-Jan-19 05:14 PM version? 17-Jan-19 05:14 PM @GigaSquirrel don't miss the pun, you! 17-Jan-19 05:14 PM (naked or trail?) 17-Jan-19 05:15 PM uh, good question. i have no clue right now :-D 17-Jan-19 05:15 PM (DM me a photo of a similar one from google) 17-Jan-19 05:15 PM Because if it is trail, then that would be a good laugh 17-Jan-19 05:17 PM no, i really haven't got any clue which version it is. but i can tell you when i'm back home next week! 17-Jan-19 05:17 PM eh...how can't you know what version it is?... 17-Jan-19 05:17 PM like... 17-Jan-19 05:17 PM how? 17-Jan-19 05:17 PM Have I found an even clueless motorbiker than me?...(jokingly I don't consider myself as a motorbiker, because I miss many of the jokes and inside group things) 17-Jan-19 05:22 PM you know, for me it's a NC700. i don't worry if it's the S or X version, as long as it's my bike and gets me from A to B via beautiful streets and mountains and curves. 17-Jan-19 05:25 PM Yeah, totally fine, my asking is about if it has windshield (trail) or not (naked) 17-Jan-19 05:25 PM because windshields are the best. I can't feel wind in my head. 17-Jan-19 05:25 PM (installed a deflector for max performance XDDD) 17-Jan-19 05:27 PM I have yet to buy a motorcycle that has an actual windshield 17-Jan-19 05:29 PM @Nixie ah. windshield, definitely. autobahn is no fun when 180km/h are trying to rip your head off... 17-Jan-19 05:29 PM Then you have a big brother to mine. 17-Jan-19 05:30 PM "big"? O_o 17-Jan-19 05:30 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/img80621-1411740080-v580x435-ECD2A.png 17-Jan-19 05:30 PM It's slightly bigger. 17-Jan-19 05:30 PM (mine is in front, yours is in the back, the red one) 17-Jan-19 05:32 PM huge difference... O_o (thought those were the same at first glance) 17-Jan-19 05:34 PM The fact that yours is in the background and makes it look smaller doesn't help 17-Jan-19 05:34 PM at 180 the wind is not bad 17-Jan-19 05:34 PM but it also really depends on the helmet you have 17-Jan-19 05:35 PM I don't know, the wind can't hit me. XDDDD (short person + high windshield) 17-Jan-19 05:35 PM altough I have only riden mine up to 175 17-Jan-19 05:35 PM I much prefer to ride @ 115 17-Jan-19 05:37 PM at 180 on a small bike the wind is terrible... at least when you're 2m tall. even with windshields, the top of my helmet is directly in the redirected wind most of the time... 17-Jan-19 05:39 PM eh, I guess I'm just used to more wind 17-Jan-19 05:39 PM the more annoying thing is how hard the wind tries to pull you off the bike 17-Jan-19 05:39 PM especially if you wear a backpack 17-Jan-19 05:41 PM Shouldn't a backpack make you slightly more aerodynamic and reduce forces? (I use a boblbee backpack, the fancy hardshell one) 17-Jan-19 05:45 PM yes, it still wants to pull you off at >250kmh 17-Jan-19 05:49 PM XDDDD 17-Jan-19 05:49 PM Not going to attain those speeds. 17-Jan-19 05:49 PM what bike do you ride? 17-Jan-19 05:54 PM when I get to ride a rn32 yzf-r1 17-Jan-19 05:54 PM although I have a few bikes 17-Jan-19 05:55 PM Pretty! 17-Jan-19 05:55 PM XD, lucky you. 17-Jan-19 06:02 PM meh, it was cheap 17-Jan-19 06:02 PM it had an electrical issue they could not figure out 17-Jan-19 06:09 PM Wait @Applied_Ion Troy has more than run down houses and crack addicts now? Last time a friend lived there he said it was a realllllyyyy bad place, like sleep with a shotgun type place... Litterally. He did... 17-Jan-19 06:12 PM XDDD 17-Jan-19 06:12 PM Wait what? It's not bad at all like that, that's a gross over exaggeration. Downtown troy has undergone a booming revitalization, lots of great programs and activities. RPI located here as well. Sure, there are some not great areas like South Troy or Lansingburg, but every city is like that. 17-Jan-19 06:12 PM oh ok... I mean he lived there years ago but not that long ago 17-Jan-19 06:12 PM that revitalization must have been damn good 17-Jan-19 06:12 PM he said he had bought a house there, you could see the sky from the basement up through both floors.... 17-Jan-19 06:12 PM no copper in the house, etc... 17-Jan-19 06:12 PM would have junkies walking up and down the street all day... 17-Jan-19 06:13 PM I've lived here for the past 9 years lol, it's really transformed quite a lot. It was supposedly a really rough place in the 70s, 80s, 90s, but really changed in the past couple of decades 17-Jan-19 06:13 PM No way lol, never seen a junky around here. Our house is 100 years old, copper pipes in it, no holes lol 17-Jan-19 06:13 PM Your friend must have really hated it here 17-Jan-19 06:16 PM I mean he didn't mind it, it was what it was, he got the cheap place to live at while he went to college in the area. 17-Jan-19 06:16 PM I mean he's a very levelheaded guy... He just spoke about it as it was. 17-Jan-19 06:16 PM He didn't really exaggerate anything, nor have I ever known him to. 17-Jan-19 06:16 PM I trust his word to the T 17-Jan-19 06:17 PM Probably was in a really rough area. There are places like that, but definitely not the whole city 17-Jan-19 06:17 PM The maker space is in the heart of downtown troy. Brand new revitalized building. Lots of great shops and restaurants, and a quite large farmers market every weekend that's well known in the area 17-Jan-19 06:20 PM Sounds like a place to visit. ^^ 17-Jan-19 06:20 PM Alright, I believe he lived there up until a few years ago. I know he was there until 2012 at-least. 17-Jan-19 06:20 PM but man some of the stories was uh... 17-Jan-19 06:20 PM interesting... 17-Jan-19 06:20 PM like apparently, he had cleaned out a basement after a sewage flood... and bought a shop vac to use and threw it out after... 17-Jan-19 06:20 PM he had put it on the curb to go out with trash, and it was filled with sewage water still... 17-Jan-19 06:20 PM and someone stole the entire vac... filled with the poop water and everything... 17-Jan-19 06:20 PM like you KNOW its a bad area when people are stealing 30 dollar shop vacs filled with poop water :P 17-Jan-19 06:20 PM LOL 17-Jan-19 06:23 PM Where did he go to college here? There are several in troy 17-Jan-19 06:24 PM Hrm, can't remember, I'll have to ask him... Unless he has it on his website... 17-Jan-19 06:24 PM http://www.glitchwrks.com/ 17-Jan-19 06:24 PM if your curious 17-Jan-19 06:24 PM Eh I'll have to ask him 17-Jan-19 06:32 PM Well, in either case, there are definitely bad areas to avoid, but plenty of perfectly fine areas. All of the stuff to do is in the better areas anyway. I know every year there's a Victorian festival, steam punk festival, a huge regional comicon convention on rpi campus, bbq festival, etc. Troy Musical Hall also has lots of outstanding concerts as well. It's a pretty good area for nerdy people lol. 17-Jan-19 06:35 PM fair enough. 17-Jan-19 06:37 PM Actually, a couple of years ago the makerspace had a huge green-tech hackathon. 36 hours straight. My friends and I entered, won one of the first place prizes lol 17-Jan-19 06:57 PM Also, our linac facility encourages public tours (when we are not running experiments) so if anyone is in the area I can give a tour of the facility, though we will be starting construction of the new linac in a year, so limited time left really to see a historic machine. 18-Jan-19 07:46 AM okay guys who was that: https://www.thingiverse.com/thing:1415836 18-Jan-19 07:47 AM ok, that's nice 18-Jan-19 07:47 AM @GigaSquirrel please print one for me 18-Jan-19 07:49 AM print and coating the insides with JB weld 18-Jan-19 07:52 AM It was not me. Altough I did do create a KF16 to shop vac adaptor. 18-Jan-19 07:52 AM To clean isopropyl from the corrugated tube 18-Jan-19 07:53 AM print with .5mm more material in every dimension, cast in aluminium and machine to size 18-Jan-19 07:53 AM @Pan Da 's option is about right. 18-Jan-19 07:53 AM KF something to shopvac sounds pretty useful, actually 18-Jan-19 07:53 AM what was shrinkage when casting aluminium? some 5 percent or so? 18-Jan-19 08:03 AM more like 6+% 18-Jan-19 08:03 AM hmmm, ok 18-Jan-19 08:03 AM ha, no, not the solidification shrinkage which is over 6% 18-Jan-19 08:03 AM the important thing ist cooling shrinkage in the solidified material 18-Jan-19 08:06 AM ???? 18-Jan-19 08:06 AM and that's according to some random sources i just found up to 2,5% 18-Jan-19 08:06 AM "one in 75 for aluminium patterns" 18-Jan-19 08:06 AM 1,4% approximately... 18-Jan-19 08:34 AM moin 18-Jan-19 08:34 AM any cheap sources for SHV connectors? 18-Jan-19 08:34 AM esp those rated for >= 20kV 18-Jan-19 01:43 PM https://www.ebay-kleinanzeigen.de/s-anzeige/kapsel-mit-hochvakuum/1014906587-155-3261 18-Jan-19 01:43 PM (German only, sry) 19-Jan-19 02:16 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20190119_111549-19F40.jpg 19-Jan-19 02:16 AM turns out all you have to do is ask nicely 19-Jan-19 03:03 AM Fffffffffffffffffffffffffffuuuuuuuuuuuuuu... 19-Jan-19 03:04 AM ❤ 19-Jan-19 03:04 AM I remember seeing a rubber electrolitic cap that was a pendrive too. 19-Jan-19 03:04 AM There are not enough geek pendrives for us. 19-Jan-19 03:05 AM never 19-Jan-19 03:06 AM sell cool pen drives! 19-Jan-19 03:20 AM "never" what? 19-Jan-19 03:20 AM I can't find the heat setting rubber supplies to do it! 19-Jan-19 03:26 AM never enough geek pendrives 19-Jan-19 03:26 AM https://youtu.be/UO1d2GyZA5o 19-Jan-19 03:47 AM how is that not done by a machine O.o 19-Jan-19 03:47 AM just take one of those cheap CNCs from ebay, hot glue the gun to it and done 19-Jan-19 04:39 AM @Pan Da wirewound resistors are bad for high voltage. They tend to fail dramatically. Water resistors are great for pulse power, but for DC you would have problems with electrolysis and corrosion. 19-Jan-19 04:49 AM i'm searching for a dump resistor for my pulse capacitors, so theoretically it would be a pulsed DC application? 19-Jan-19 04:49 AM i don't know, something in my head doesn't want to use water in that application XD 19-Jan-19 05:16 AM @robamacl problem is, i theoretically need 500k or 600k at 40kV and +3kW... as cheap as possible. XD 19-Jan-19 07:30 AM well, the pulsed power book talks kinda exactly about that, cheap resistors made from coppersulfate solution 19-Jan-19 07:36 AM that sounds... bad in changing temperature environments 19-Jan-19 07:37 AM it doesn't have to be precise 19-Jan-19 07:48 AM then we shall experiment in this direction. 19-Jan-19 07:50 AM time for you to get here so we can start with that 19-Jan-19 07:50 AM on my way 19-Jan-19 07:51 AM you can start by getting copper sulfate 19-Jan-19 07:51 AM already got some 19-Jan-19 07:53 AM nice. next thing is to make a graph for resistance over contentration 19-Jan-19 07:58 AM http://www.pulsedpower.net/applets/pulsedpower/coppersulfateresistor/coppersulfateresistor.html 19-Jan-19 08:00 AM boooring... XD 19-Jan-19 08:00 AM hmh. that's not good... 19-Jan-19 08:04 AM mhhh? 19-Jan-19 08:05 AM maybe i don't quite understand the calculator, but i can't get the resistance as high as i'd like... 19-Jan-19 08:08 AM 1 meter long, 1 cm diameter, 0.96g/l gives 600 kOhm 19-Jan-19 08:09 AM what 19-Jan-19 08:09 AM no, it doesn't 19-Jan-19 08:09 AM when i enter 100cm*1cm and 600k it tells me undefined / 0,226g/l 19-Jan-19 08:13 AM what the... 19-Jan-19 08:13 AM I just wanted to check my results and the calculator has stopped giving me any results, just "undefined" 19-Jan-19 08:14 AM that's what i meant 19-Jan-19 08:14 AM wrong ratios 19-Jan-19 08:14 AM but it does so for me regardless of the inputs 19-Jan-19 08:14 AM play around with it until it gives values and then just nudge the inputs bit by bit 19-Jan-19 08:14 AM 1m/1m/1ohm is the starting point 19-Jan-19 08:14 AM 1cm diameter, 500cm long and 100kOhm works for me 19-Jan-19 08:15 AM yes, and once I change that it goes to "undefined" 19-Jan-19 08:15 AM 21.563g/l 19-Jan-19 08:15 AM but 30m of high voltage resistor... nah. XD 19-Jan-19 08:16 AM just roll it up, if inductance doesnt matter xD 19-Jan-19 08:17 AM thats what i just thought 19-Jan-19 08:17 AM buy some garden hose and don't even unpack it 19-Jan-19 08:17 AM hmmmm, 8mm ID tubing, 5m long, 22,8g/l gives me 150k 19-Jan-19 08:17 AM so 20m 600k 19-Jan-19 08:17 AM but can it handle a 3kW-pulse? 19-Jan-19 08:18 AM no, the question is: what temp will it reach with 44 kJ heat input 19-Jan-19 08:18 AM samesame 19-Jan-19 08:18 AM it's almost exactly 1 liter... 19-Jan-19 08:19 AM what did someone say yesterday one liter will beat up 1 degree? 19-Jan-19 08:19 AM 4J/g water heats it up around one degree 19-Jan-19 08:19 AM hm, well a bit more so 19-Jan-19 08:20 AM yeah, so 4 kj to heat one liter 1 °C 19-Jan-19 08:20 AM => 40 kj will heat one liter by 10 °C? 19-Jan-19 08:20 AM so 10° per pulse into the resistor 19-Jan-19 08:20 AM that's not bad actually 19-Jan-19 08:21 AM lets say 30 degree for the safe site, still enough for a pulse 19-Jan-19 08:21 AM but will take a long cooldown time (badum ts) 19-Jan-19 08:21 AM and we're talking about full charge here, worst case scenario 19-Jan-19 08:21 AM mhh, wurst 19-Jan-19 08:21 AM lyoner? 19-Jan-19 08:22 AM weißwurst! 19-Jan-19 08:23 AM bavarians ... 19-Jan-19 08:28 AM glad that's sorted 19-Jan-19 08:28 AM now onto how to switch the resistor 19-Jan-19 08:28 AM I'd just go with a pneumatic switch? 19-Jan-19 08:28 AM dosen't have to be high power, dosen't have to be fast 19-Jan-19 08:29 AM yes 19-Jan-19 08:51 AM "Doesn't have to switch?" Too? 19-Jan-19 09:06 AM (not kidding) can you freeze the water with the coil inside? It might allow for a few more shots than just room temperature water. 19-Jan-19 09:07 AM that's just emergency dump for when everything else fails 19-Jan-19 09:07 AM let's hope we don't need a high rep rate at that 19-Jan-19 09:10 AM every 6 minutes "oops" FOMP 19-Jan-19 09:20 AM Emergency dump...so you are going to friendzone the capacitor? 19-Jan-19 09:20 AM Enough for today, byeeee! 19-Jan-19 10:19 AM For the dump resistor, what us the voltage and current? 19-Jan-19 10:19 AM 3kw for a pulse is literally nothing lol 19-Jan-19 10:19 AM I've put way more power pulsed into surface mount resistors 19-Jan-19 10:19 AM Copper sulfate resistors are the default for real high power stuff. This is due to the fact they are very low inductance, and can handle huge voltages and currents as well 19-Jan-19 10:21 AM Voltage: rated capacitor voltage is 44kV, we don't plan on anything over 30kV, but for safety's sake i calculated everything fpr 40kV 19-Jan-19 10:22 AM At 40kv, you are going to see way more than 3kw peak, unless your current is abysmally small 19-Jan-19 10:22 AM What's the load as well? 19-Jan-19 10:22 AM current... well, the caps can do 150kA according to the datasheet... i just calculated everything for about 2,5s of discharge time as i wanted to keep resistors cheap...er 19-Jan-19 10:23 AM 2.5s discharge time? What type if switch are you using? 19-Jan-19 10:23 AM it's just the emergency dump resistor. 19-Jan-19 10:24 AM Oh, not a test load? 19-Jan-19 10:24 AM i wouldn't want to experiment with kJs of pulse capacitor without a safe way of discharging everything 19-Jan-19 10:24 AM when the whole safety, charge and discharge stuff is up and running i can start working on any other experiments using these caps 19-Jan-19 10:25 AM Fir a slow discharge, that's more dc rather than a pulse. Copper sulfate will work, but you will get electrolysis. Since it's a dump, you can also make a large nichrome wire resistor 19-Jan-19 10:26 AM ....ohhhhh I just realised 19-Jan-19 10:26 AM i calculated resistance wires' prices... for 600kOhm. and didn't think of the higher powers i could pulse through them. dammit! 19-Jan-19 10:26 AM same for the coppersulfate 19-Jan-19 10:26 AM ...back to the drawing board! or calculating board. 19-Jan-19 10:29 AM I'll definetely be needing copper sulfate, on the account of switching potentially 10GW peak if it works right 19-Jan-19 10:29 AM What are you using to switch into the dump resistor? Like mechanically actuated shorting rod? 19-Jan-19 10:30 AM will probably use a pneumatic switch... or my big hydrogen thyratron, we'll see 19-Jan-19 10:30 AM i need to look at its maximum values. no idea at the moment how much the thyratron can handle 19-Jan-19 10:32 AM Yeah, a mechanical shorting rod may be better. Thyratron switch at uS level, and if your load discharge is on the order of seconds you will need it to fire rapidly 19-Jan-19 10:32 AM huh, good point 19-Jan-19 10:32 AM and a pneumatic cylinder is isolated. that's a big plus too 19-Jan-19 10:33 AM I wouldn't waste a useful thyratron for a dump switch lol 19-Jan-19 10:33 AM Save it for triggering 19-Jan-19 10:34 AM for triggering we thought about a TSG of some sort 19-Jan-19 10:34 AM i don't think my big thyratron can handle >100kA 19-Jan-19 10:34 AM What's TSG? 19-Jan-19 10:34 AM triggered spark gap 19-Jan-19 10:34 AM It depends how you design it lol 19-Jan-19 10:34 AM They can handle mega amps 19-Jan-19 10:34 AM At extreme rise times 19-Jan-19 10:34 AM Depends on your geometry, triggering methods, probably going with a pressurized gap at that point, etc 19-Jan-19 10:37 AM that's why we want to use a TSG instead of the thyratron ^^ 19-Jan-19 10:37 AM Yeah no thyratron at those levels, no way lol 19-Jan-19 10:37 AM But don't look at the standard gaps people make for stuff like tesla coils and small things, that won't cut it anymore if you want to start talking real performance 19-Jan-19 10:37 AM Fortunately high performance gaps are still super cheap to make 19-Jan-19 10:37 AM Especially since you are only switching 40kv max, that's nothing lol 19-Jan-19 10:38 AM exactly 19-Jan-19 10:39 AM well, just 40 kV for the caps, but technically they're just energy storage caps 19-Jan-19 10:39 AM TBH we're still looking for a load worthy of the caps 19-Jan-19 10:46 AM i thought we'd make a can crusher... for oil barrels? 19-Jan-19 10:48 AM manhole cover shrinker 19-Jan-19 10:49 AM manhole cover launcher. 19-Jan-19 10:49 AM shrunken manhole cover launcher 19-Jan-19 10:49 AM or we could shrink 10mm washers to fit on 5mm bolts! 19-Jan-19 10:49 AM enough joking around. the launcher principle sounds good for metalforming - just magnetically forming sheets of metal into negative forms 19-Jan-19 10:54 AM https://www.youtube.com/watch?v=9xPIzVf-eZU 19-Jan-19 10:54 AM stuff like that 19-Jan-19 10:57 AM nice 19-Jan-19 10:58 AM that's only 3kJ 19-Jan-19 10:58 AM so we can do the same with ~10mm steel 19-Jan-19 10:58 AM so we could probably punch A LOT more... XD 19-Jan-19 10:58 AM exactly what i was thinking. 19-Jan-19 10:59 AM 10mm steel on m² sized dies 19-Jan-19 11:00 AM cutting our initials out of old tanks 19-Jan-19 11:00 AM ehehe 19-Jan-19 11:00 AM finally 19-Jan-19 11:01 AM i still dream of electromagnetic anti-tank-mines. simply launching the tank, possibly flipping it on its roof 19-Jan-19 11:01 AM without damage to the crew if possible 19-Jan-19 11:01 AM ...or underground induction heaters melting off the tracks XD 19-Jan-19 11:02 AM the problem with induction heaters is that they want constant power 19-Jan-19 11:02 AM and like 10 kW of induction heating really isn't that much 19-Jan-19 11:04 AM Y'all need to learn what off topic means 19-Jan-19 11:04 AM too on topic for off topic? 19-Jan-19 11:04 AM LOL 19-Jan-19 11:05 AM It's fine it's just also funny 19-Jan-19 11:05 AM ablate the tank armour down to 0.195mm and then use a tin opener? 19-Jan-19 11:05 AM i think there was no vacuum stuff in the last few hours! :-D 19-Jan-19 11:05 AM @N00N i just imagined soldiers armed with nothing but big can openers searching the battlefields rofl 19-Jan-19 11:06 AM Oh also, I have a suggestion to make. We should have a hangouts we do every now and then for everyone to show what they are working on. 19-Jan-19 11:06 AM I'm a part of another group of people who hacks on random hardware, be it diesel engines, Subaru powered VW Vanagons, electronic projects, programming, assembly coding, playing games, whatever it may be. And they have a 24/7 hangouts that people pop in and out of all day pretty much 19-Jan-19 11:06 AM we have people in Australia, US, etc... 19-Jan-19 11:06 AM Its nice to have a place people can go to just chat WHENEVER they are available 19-Jan-19 11:06 AM and with that you can share screens, camera, etc. 19-Jan-19 11:09 AM everyone can always use voicechat here 19-Jan-19 11:09 AM not quite the same to be honest, trust me I've been a part of quite a few similar groups and the hangouts works soooo well 19-Jan-19 11:09 AM its so difficult to have to share photos, and pretty jaring and takes people out of their work. 19-Jan-19 11:11 AM Yeah I don't see any reason why that wouldn't work 19-Jan-19 11:11 AM ok 19-Jan-19 11:11 AM I mean like I'll have my camera pointed at my workbench while I'm soldering in hangouts, and anyone can poke and see what I'm working on by focusing on my camera 19-Jan-19 11:11 AM and if I have something to show I say, Hey look at this! and its easy 19-Jan-19 11:11 AM instead of stop my work, take out my phone, take a photo, upload, etc... 19-Jan-19 11:12 AM It would be nice for those of us who can't always make the hang out 19-Jan-19 11:12 AM exactly, its just a place to drop in and out of whenever 19-Jan-19 11:12 AM Also now I need to get good internet in the shop... 19-Jan-19 11:12 AM Because I don't have that right now, something chewed through my Ethernet 19-Jan-19 11:13 AM Hangouts isn't really super designed for it... the way my friends did it was they have a bot that always sits in the hangouts and keeps it open, its a bit cludgy but I don't know any other better service to be honest 19-Jan-19 11:13 AM rip 19-Jan-19 11:13 AM We could just use discord 19-Jan-19 11:15 AM @AdamMcCombs only way to share screens/video on discord is through a private DM group 19-Jan-19 11:15 AM no way in a server AFAIK 19-Jan-19 11:15 AM Yeah, we could just invite everyone interested into a large group dm 19-Jan-19 11:22 AM is interested 19-Jan-19 11:24 AM dito 19-Jan-19 11:35 AM yup 19-Jan-19 12:30 PM Hah, the "scariac" reminds me of a friend testing the powersupply for his linear amplifier 19-Jan-19 12:30 PM 6x modified MOT to get enough 3kV to feed some weird japanese television transmitter tetrode 19-Jan-19 12:30 PM we did not have a proper dummyload 19-Jan-19 12:30 PM so a plastic bucket with some water was used as the dummyload for testing it. 19-Jan-19 12:32 PM lol 19-Jan-19 12:35 PM just put some CuSO4 in the bucket and you can suddenly call it a professional termination resistor 19-Jan-19 12:41 PM @Nixie how's your vidicon going? 19-Jan-19 12:43 PM Parts should be in the mail, but it is a slow process, I'm afraid. 19-Jan-19 03:28 PM oh wow 19-Jan-19 03:28 PM the glass on vidicons is in fact soldered on 19-Jan-19 03:29 PM with gallium or similar 19-Jan-19 03:30 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20190120_000631-E929F.jpg 19-Jan-19 03:30 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20190120_000612-2CE65.jpg 19-Jan-19 03:31 PM Nice! I wondered how was I going to remove that. One less problem 19-Jan-19 03:34 PM yeah, that makes this part way easier 19-Jan-19 03:34 PM I found that out by accident, I actually wanted to cut it open with a diamond saw 19-Jan-19 03:34 PM but than I thought it might be a better idea to crack the front glass by thermal stress, so I put it in the freezer and then heated the front glass with a lighter 19-Jan-19 03:35 PM Oh wow! 19-Jan-19 03:35 PM at some point, it made the zisch noise, and I tough there was a tiny crack and the thing is about to scatter. But then I turned it around and the glass simply fell off 19-Jan-19 03:35 PM it wasn't to hot actually, I would say <100°C 19-Jan-19 03:36 PM (i'll do it with the hot plate, but I get the point) 19-Jan-19 03:37 PM I woud use hotair next time 19-Jan-19 03:37 PM I could theoretically do it in an argon bag to preserve the filament too. 19-Jan-19 03:37 PM I just quickly flushed it with helium after the decapping 19-Jan-19 03:37 PM 19-Jan-19 03:38 PM and now it stands upside down so the helium is collected on the top around the filament 19-Jan-19 03:38 PM unfortuantly I'll have to wait till tomorrow to out it in vacuum 19-Jan-19 03:38 PM I wonder, can we re-weld it to a flange of some.sort? 19-Jan-19 03:38 PM probably 19-Jan-19 03:38 PM What metals does gallium weld to? 19-Jan-19 03:38 PM but using epoxy is way easier 19-Jan-19 03:39 PM Hmm...i wanna try the welding. 19-Jan-19 03:40 PM use aluminium :-D 19-Jan-19 03:40 PM (no, please don't) 19-Jan-19 03:40 PM i'd simply glue it in with epoxy. or if it has to be more professional use some clamping o-ring assembly 19-Jan-19 03:42 PM Not gonna catch me there, u b**. 19-Jan-19 03:42 PM The clamping oring might be difficult. 19-Jan-19 03:42 PM Why not the welding?? 19-Jan-19 03:42 PM Like...if it's only 100°C i can heat the parts easily. 19-Jan-19 03:44 PM 'cause i have no clue of welding/soldering glassware. ^^ 19-Jan-19 03:44 PM I assume that the glass part already has a gallium wetted part. 19-Jan-19 03:46 PM It does as every else does too 19-Jan-19 03:46 PM gallium is super sticky 19-Jan-19 03:48 PM Good 19-Jan-19 03:48 PM Could also be a Bi/In alloy, btw. 19-Jan-19 03:48 PM In theory I could machine a stainless flange. 19-Jan-19 03:48 PM And weld it. 19-Jan-19 04:02 PM Altough I would totally try a...whossname glass friendly metal alloy 19-Jan-19 04:02 PM (kovar) 19-Jan-19 04:08 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20190120_010746-B9A61.jpg 19-Jan-19 04:09 PM looks prices Ahem...we said epoxy, right? 19-Jan-19 04:09 PM What's that adapter? 19-Jan-19 04:11 PM on the top? 19-Jan-19 04:11 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/img-398872-A602E.jpg 19-Jan-19 04:11 PM it's a part from an old vacuum vent 19-Jan-19 04:11 PM I want to use it as the main vakuum chamber 19-Jan-19 04:11 PM ah, and I had not enough KF25 clamps, so I had to print one 19-Jan-19 04:11 PM works pretty well 19-Jan-19 04:13 PM Niiiiiice! 19-Jan-19 04:15 PM http://www.3dcontentcentral.com/secure/download-model.aspx?catalogid=9852&id=443428 19-Jan-19 04:16 PM (in the phone) Is that a link for the kf clamp model? 19-Jan-19 04:17 PM yes 19-Jan-19 04:17 PM Niice, will check it tomorrow in my computer. 19-Jan-19 04:19 PM doesn't work without account? 19-Jan-19 04:23 PM yes, but it's a nice platform so it's worth creating one 19-Jan-19 04:25 PM hmmm. 19-Jan-19 04:27 PM 3dcontentcentral is good. Multiple formats and yet to get crap models from there 20-Jan-19 03:31 AM I cant believe how much a few days of remote support for overseas throws off sleep this is awful 20-Jan-19 03:32 AM good morning adam! 20-Jan-19 03:32 AM its not even morning though 20-Jan-19 03:32 AM not for me 20-Jan-19 03:33 AM for me, morning is when i wake up 20-Jan-19 03:33 AM Seriously I was getting up at 5 am on Monday and now here I am at 3:30 not asleep 20-Jan-19 03:33 AM It's like jetlag without the jet 20-Jan-19 03:34 AM ouch. 20-Jan-19 03:34 AM I mean its peaceful and all but still 20-Jan-19 03:34 AM Result of this though is I found the vacuum leak in my new sputter coater 20-Jan-19 03:38 AM fixable or a good reason for it to be that cheap? 20-Jan-19 03:39 AM Yeah its just an oring 20-Jan-19 03:39 AM I pretty much guessed where it was in about 5 min, testing it took more time 20-Jan-19 03:39 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/T3ePbKh5jzGXtu_L_2uixrMaIeCVUYCCCC7dOa385W-31D7A.png 20-Jan-19 03:39 AM Its the one that seals the hole that this oring got sucked into when I vented 20-Jan-19 03:39 AM Well seals the shaft that seals the hole 20-Jan-19 03:39 AM Also look at this adorable variac in it 20-Jan-19 03:39 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/3HIVpz6G_i6p7iLLMXLQsbFkMHuVuIgFOG2vpBniQE-B9743.png 20-Jan-19 03:39 AM And naturally the knife marks on the vacuum fitting where they took the hose off 20-Jan-19 03:39 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/tEND2fxgWIxybOA0a3GU7B4iE0rMyvs_RRIMDxkTE2-1C826.png 20-Jan-19 03:39 AM This one is quite literally cool though, its got a Peltier stage 20-Jan-19 03:39 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/vIN8SVkjlPto9F0fSfWB7RxNXGDuMDr8bTXWmS0LaU-B5B49.png 20-Jan-19 03:39 AM My other ebay coater also had a knife mark on the vacuum barb so im sensing a trend 20-Jan-19 03:39 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/jRx8_DimNR3KOcpP_gVfSjvC5gbdlCcG7Mk-nxksou-7B775.png 20-Jan-19 03:39 AM /end photo_spam 20-Jan-19 03:48 AM looks nice 20-Jan-19 03:48 AM but... 20-Jan-19 03:48 AM isn't that a bit too... on topic? 20-Jan-19 03:49 AM Whats that? 20-Jan-19 03:49 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/unknown-6B040.png 20-Jan-19 03:50 AM now everything can happen in here! 20-Jan-19 03:56 AM it's a magical place 20-Jan-19 04:18 AM yeah those 30W or so variacs were common back in the day 20-Jan-19 05:37 AM regavolt!! 20-Jan-19 05:38 AM rega is a weird prefix, definitely not SI 20-Jan-19 05:38 AM maybe something american. imperial stuff... 20-Jan-19 05:38 AM ew, right 20-Jan-19 05:38 AM 1 regavolt is 10^2.54 Volt or something like that 20-Jan-19 06:42 AM So why can't this be named #secondary_general instead? XDDDDDDDDDD 20-Jan-19 10:18 AM what does yellow blinking of the status led on the hornets mean? 20-Jan-19 10:19 AM error 20-Jan-19 10:33 AM the failure caused by using analog ground for switching, what it it? 20-Jan-19 10:33 AM death 20-Jan-19 10:33 AM ah 20-Jan-19 10:33 AM what are the symptoms? 20-Jan-19 10:34 AM 1kV on analog output 20-Jan-19 10:34 AM not sure if it also happens on this failure mode, but at least its one symptom 20-Jan-19 10:34 AM that I found 20-Jan-19 10:35 AM just goes to "error" all the time 20-Jan-19 10:35 AM interesting 20-Jan-19 10:35 AM I have this fault 20-Jan-19 10:36 AM did you use analog ground for switching? 20-Jan-19 10:36 AM no 20-Jan-19 10:36 AM in that case it might / should be the caps 20-Jan-19 10:36 AM when switching it on, current should rise to ~400 mA, then drop to ~85 mA with the status light blinking 20-Jan-19 10:36 AM all of my gauges with dead caps showed that behaviour 20-Jan-19 10:41 AM okay I only replaced the obviously fried cap? 20-Jan-19 10:41 AM do I need to replace multiple? 20-Jan-19 10:42 AM yep, all of the elcos 20-Jan-19 10:42 AM and how should the current behave? 20-Jan-19 10:44 AM rise until it settles to ~200-300 mA, depending on filament condition 20-Jan-19 10:50 AM meh 20-Jan-19 10:50 AM for me it rises to 450mA, then the error and 40mA 20-Jan-19 10:51 AM huh, 40 is lower then I remember 20-Jan-19 10:51 AM but yeah, either dead caps or filament 20-Jan-19 10:58 AM wat? 20-Jan-19 10:58 AM Nothing, nothing, your gauge is not dead 20-Jan-19 10:59 AM i dont even have one D: 20-Jan-19 10:59 AM everything's dead and there's no hope 20-Jan-19 10:59 AM Oh dammit, I meant Niklas 20-Jan-19 10:59 AM I am rather slow lately. 20-Jan-19 11:00 AM hmm, replaced all caps. still nothing 20-Jan-19 11:00 AM I think this one is dead 20-Jan-19 11:03 AM If (dead = 1 ) then (send KF16 piece) to (Nixie) 20-Jan-19 11:05 AM why dont you wanna try the electric feedthroughs? 20-Jan-19 11:05 AM or do you 20-Jan-19 11:06 AM ??? 20-Jan-19 11:06 AM That phrase construction makes it incomprehensible. 20-Jan-19 11:06 AM ^^U 20-Jan-19 11:07 AM on the KF16 piece from the hornet 20-Jan-19 11:07 AM Yeah? 20-Jan-19 11:07 AM there are electric feedthroughs 20-Jan-19 11:07 AM yes, I want to try to do things with them. 20-Jan-19 11:07 AM do you wanna try utilizing them? 20-Jan-19 11:07 AM aha 20-Jan-19 11:08 AM oh ok 20-Jan-19 11:40 AM Working now :3 20-Jan-19 11:41 AM congrats, what was the issue? 20-Jan-19 11:44 AM I have no idea 20-Jan-19 11:46 AM lol 20-Jan-19 11:46 AM as long as it works now 20-Jan-19 11:46 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20190120_202811-339B7.jpg 20-Jan-19 11:46 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20190120_202823-33557.jpg 20-Jan-19 12:11 PM NICE! 20-Jan-19 03:56 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20190121_005628_269-A8574.jpg 20-Jan-19 03:56 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20190121_005623_106-EFC07.jpg 20-Jan-19 03:56 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20190121_005616_201-A15B5.jpg 21-Jan-19 01:27 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20190121_221533-57748.jpg 21-Jan-19 01:27 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20190121_221629-C5FCA.jpg 21-Jan-19 01:27 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20190121_221544-0C8CB.jpg 21-Jan-19 01:27 PM I did a thing! 21-Jan-19 02:41 PM Photon or electron amplifier? 21-Jan-19 02:41 PM I did a thing too! 21-Jan-19 02:41 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20190121_232205-93919.jpg 21-Jan-19 02:42 PM Photomultiplier 21-Jan-19 02:42 PM complete redesign of your tape unroller? 21-Jan-19 02:44 PM Totally changed the way I want the feeder to perform. Tape enters through the bottom, (but you can load it from the front movable piece) covering film gets discarded tjrough the front, empty tape goes through the top. 21-Jan-19 02:44 PM https://twitter.com/nixie_guy/status/1087452132536655872?s=19 21-Jan-19 02:45 PM uhh, now with fancy anymations! 21-Jan-19 02:46 PM "rotate part" 21-Jan-19 02:46 PM And what did you do, extract the pimout of the thing? 21-Jan-19 02:47 PM yeah 21-Jan-19 02:47 PM 5 mins after that I found a paper describing it... 21-Jan-19 02:47 PM hey, at least I got confirmation 21-Jan-19 02:48 PM 21-Jan-19 02:48 PM When do you power it up? 21-Jan-19 02:50 PM don't really have a use for it right now 21-Jan-19 02:50 PM Find one then! 21-Jan-19 02:50 PM You have inserts to test! 21-Jan-19 02:51 PM would love to have one of these 63x63mm Scintillators, but damn, not sure if I want to pay 150+ for that... 21-Jan-19 02:51 PM haha, the tube is getting pretty close to the limit of my lathe... 21-Jan-19 02:53 PM XD 21-Jan-19 02:53 PM The 63mm one is bigger or smaller than this one? 21-Jan-19 02:54 PM ah, no, scintillator would be a radiation detection crystal that can be used with a photomultiplier tube to make something akin to a geiger counter on steroids 21-Jan-19 02:54 PM and a 63mm diameter scintillator would fit perfectly onto the tube I have 21-Jan-19 03:17 PM Ahh 21-Jan-19 03:17 PM Misunderstood, sorry. 22-Jan-19 05:13 AM @GigaSquirrel It looks like the window is yellow. Do you know why? 22-Jan-19 05:13 AM that's the photocathode 22-Jan-19 05:13 AM it's some alkali metal mix evaporated onto the glas 22-Jan-19 05:17 AM Ok. 23-Jan-19 09:58 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20190123_185740-C4DBD.jpg 23-Jan-19 11:13 AM Woooooo 23-Jan-19 11:13 AM Lovely! 23-Jan-19 11:13 AM Now onto the firmware? 23-Jan-19 03:51 PM wooowww beautiful! 24-Jan-19 04:50 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/15483774178162002630709-02C30.jpg 24-Jan-19 04:50 PM Me after getting invited in this group. 24-Jan-19 10:43 PM Morning! \o/ getting ready for an interesting job interview 24-Jan-19 10:48 PM Good luck! 24-Jan-19 11:42 PM awesome, best wishes 25-Jan-19 01:38 AM tl:dr of job interview: It was for a engineer salesman-ish profile, so not for me. BUT my profile was too interesting to let it pass, R+D boss will call next week to see how can I be fitted in there, be either a per project collab or full time (depending on how interesting he deems me to be) 25-Jan-19 01:39 AM Congratulations! 25-Jan-19 01:39 AM Thanks, but undeserved yet. Let's see what happens next week. 25-Jan-19 01:43 AM awesome, sounds great 25-Jan-19 01:43 AM every successful interview is a win :) 25-Jan-19 01:44 AM +1 25-Jan-19 01:44 AM +2 25-Jan-19 01:49 AM They showed me a product. A crepuscular light equipped with a LDR, that didn't work properly when the translucent cover was put on (autoblinking, not even histeresys built in). Me: then just use an infrared sensor so its sensible only to sunlight. Their faces: 25-Jan-19 01:49 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/descarga_2-AD05F.jpeg 25-Jan-19 01:50 AM haha nice, exactly thats the big pro you/hobbyists have 25-Jan-19 01:50 AM rather than starting to calvulate luminuous flux and how it would do unter this and this ^^ 25-Jan-19 01:51 AM 25-Jan-19 01:51 AM Totally. 25-Jan-19 01:52 AM hahaha 25-Jan-19 01:56 AM Well, next week, second chapter. 25-Jan-19 01:58 AM not third by now? 25-Jan-19 02:41 AM Second chapter of this interview, I mean 25-Jan-19 02:42 AM ah, right 25-Jan-19 02:56 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20190125_230016-60780.jpg 25-Jan-19 02:56 PM I have 6-7 gauge kits to sell 25-Jan-19 02:56 PM SMD preassembled 25-Jan-19 02:56 PM 15€ for a complete kit (programmed STM32, lcd, connectors, screws) and + 5€ for a 24V 1A power supply 25-Jan-19 02:57 PM maybe move that to => #swap-meet 26-Jan-19 01:44 AM Morning! \o/ hasn't slept, feels great stalked next interviewer in linkedin 26-Jan-19 01:44 AM you didn't sleep yet? 26-Jan-19 01:44 AM moin 26-Jan-19 02:26 AM Yup, pulled out an all nighter doing things. 29-Jan-19 09:00 AM @GigaSquirrel 29-Jan-19 09:00 AM uses LED shield, is supper efective! 29-Jan-19 09:00 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20190129_175933-D807C.jpg 29-Jan-19 09:00 AM uses lead shield 29-Jan-19 09:00 AM doubts he can actually lift said shield 29-Jan-19 09:01 AM would not be the first time with 30+ kg of lead in my backpack 29-Jan-19 09:02 AM @Applied_Ion dumps bank of caps into appropriately designed coil verified with 3 types of FEA resulting in an emp disabeling LED shield 29-Jan-19 09:02 AM lifts his 120Kg lathe Where you saying? 29-Jan-19 09:03 AM energizes 3 MeV tank 29-Jan-19 09:03 AM at least my back's fine 29-Jan-19 09:04 AM Excuses, excuses. 29-Jan-19 09:04 AM realizes @Applied_Ion EMP just fried the led shield and all smartphones and things... 29-Jan-19 09:04 AM now what? 29-Jan-19 09:05 AM 3 MeV tank is a metal tank that's well grounded and is fine 29-Jan-19 09:06 AM duck voice Now all the iphones don't work anymore. MWAHAHAHAH 29-Jan-19 09:08 AM Lol yeah including my phone as well 29-Jan-19 09:10 AM uuuugh 29-Jan-19 09:10 AM speaking of electronics 29-Jan-19 09:10 AM I gotta redo all of the wiring of my chamber >.< 29-Jan-19 09:11 AM Ouch 29-Jan-19 09:11 AM Was >1 kV involved? 29-Jan-19 09:12 AM yes and no, I don't need to rewire my 30 kV supply because I haven't done that yet 29-Jan-19 09:12 AM luckily just the low voltage stuff for now 29-Jan-19 09:12 AM gauges, MFC, power for the pumps 29-Jan-19 09:14 AM why do you need to rewire everything? 29-Jan-19 09:15 AM yeah, why? 29-Jan-19 09:19 AM so far I've powered everything with my lab Power supply and tonns of Extension cords 29-Jan-19 09:19 AM Lol that's fun to scale 29-Jan-19 09:20 AM Now I've rearanged my stuff and the cables don't reach to the supply => time for a dedicated PS and some rackmount power delivery stuff 29-Jan-19 09:22 AM Go, go, go! 29-Jan-19 09:58 AM done with dinner 29-Jan-19 09:58 AM time for coffee and some electricians work after that 29-Jan-19 10:16 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20190129_191532-BBD14.jpg 29-Jan-19 10:52 AM looks through stack of SMPSs 24V 6.5A should do the trick 29-Jan-19 11:05 AM good thing hammond mfg are so liberal with their samples, otherwise I would have to buy a new 19" case for the power stuff 29-Jan-19 12:11 PM XDDDDD 29-Jan-19 12:11 PM AHEM...will you please clean that X in the gauge if it is working? 29-Jan-19 12:11 PM :PPPPP 29-Jan-19 12:21 PM if 29-Jan-19 12:21 PM it's got issues 29-Jan-19 02:29 PM Daddy issues? 29-Jan-19 02:30 PM Maybe that's the problem, because I just can't seem to get it turned on 29-Jan-19 06:20 PM https://www.poughkeepsiejournal.com/story/news/local/2019/01/17/ibm-open-quantum-computing-facility-poughkeepsie/2608766002/ 29-Jan-19 06:20 PM Woot, this is where I work :) 29-Jan-19 10:35 PM Nice! 29-Jan-19 10:35 PM Will you get to see the facilities? 30-Jan-19 03:24 AM Oh god, I don't have a single working high vacuum gauge at the moment 30-Jan-19 03:24 AM I'm getting withdrawal symptoms! 30-Jan-19 03:57 AM XDDDD 30-Jan-19 03:57 AM better go order the bunch of hornets, then 30-Jan-19 03:58 AM have to wait 'till friday 30-Jan-19 03:58 AM money and stuff ^^ 30-Jan-19 03:59 AM yeah 30-Jan-19 03:59 AM I know the drill. 30-Jan-19 04:02 AM ^^ 30-Jan-19 04:10 AM But I just contacted the seller, to start the price negotiations 30-Jan-19 04:46 AM As I told everyone some time ago: 30-Jan-19 04:46 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/unknown-AF176.png 30-Jan-19 04:46 AM "All of it is viable weapons grade tech" /Mortal Engines movie/ 30-Jan-19 04:46 AM If that in the center is not a diffusion pump. I'll eat my imaginary hat 30-Jan-19 04:48 AM the good old weapons grade diff pump 30-Jan-19 04:49 AM looks like it even is CF 30-Jan-19 04:50 AM More than CF, looks like my turbo, flat surface with retention ring. 30-Jan-19 04:50 AM hmm 30-Jan-19 04:50 AM I don't know, to me it looks like rotateable CF 30-Jan-19 04:51 AM Not an expert, so I won't argue much. 30-Jan-19 04:51 AM Maybe in a full HD rip of that we will see it better. 30-Jan-19 04:52 AM me neither, I'm just saying what I think ^^ 30-Jan-19 06:30 AM I think that's an old ASA flange 30-Jan-19 03:39 PM What's that about weapons grade diffusion pumps? 30-Jan-19 03:39 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/Calutron_diffusion_pumps-DA990.jpg 30-Jan-19 10:59 PM Yeah, but not a smallish one like that in the movie. 01-Feb-19 05:07 AM @GigaSquirrel pretty sure it's an Edwards Diffstak like mine, you can see the water tube dive thru the wall to the cold cap. So it would be an ISO o ring seal. 01-Feb-19 05:07 AM oh well, ok ^^ 01-Feb-19 05:09 AM In front of it looks like a weapons grade levelling foot for an industrial machine. 01-Feb-19 05:19 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20190201_135040-59A86.jpg 01-Feb-19 05:19 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20190201_134218-AC7EC.jpg 01-Feb-19 05:19 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20190201_134739-A9179.jpg 01-Feb-19 05:19 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20190201_134143-12EAF.jpg 01-Feb-19 05:19 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20190201_141416-AD022.jpg 01-Feb-19 05:19 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20190201_134147-FD98D.jpg 01-Feb-19 05:19 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20190201_134403-9D2E6.jpg 01-Feb-19 05:19 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20190201_135910-9FD2D.jpg 01-Feb-19 05:19 AM Anyone wants any of that stuff? 01-Feb-19 05:19 AM Scrapyard, so pretty cheap 01-Feb-19 05:19 AM ~50ct / kilo 01-Feb-19 05:34 AM what the hell kind of scrapyard is that 01-Feb-19 05:43 AM Uhm, an average German scrapyard? 01-Feb-19 05:43 AM We have two of those here and they both have all kind of industrial equipment 01-Feb-19 05:43 AM Mostly boring processing / packaging machines but sometimes they have instruments and vacuum equipment 01-Feb-19 05:43 AM Got a working rotary valve that still makes 10^-3mbar and a turbo pump from there 01-Feb-19 05:43 AM Unfortunately as you can see they don't handle stuff very well so knobs are usually broken 01-Feb-19 05:43 AM This time is looks like they disposed stuff from the nuclear institute not a local University so lots of ion beam power supplies and electron optics amplifier and sweep generators 01-Feb-19 05:43 AM @JanHenrik bought the MCA and the counter, because it has 8 nixies 01-Feb-19 05:43 AM I got some high voltage supplies 01-Feb-19 05:51 AM oh, cool 01-Feb-19 05:51 AM mine has mostly 01-Feb-19 05:51 AM well 01-Feb-19 05:51 AM scrap 01-Feb-19 05:59 AM XDDDDD 01-Feb-19 06:40 AM hey @niklas where in germany is that? 01-Feb-19 07:06 AM Münster ^^ 01-Feb-19 08:07 AM Aww 2 out of 8 nixies are broken 01-Feb-19 08:07 AM But the counter still works, as well as the 7kV power supply 01-Feb-19 08:07 AM The multi channel analyzer still needs to dry D: 01-Feb-19 08:08 AM WD40 regelt 01-Feb-19 08:16 AM Hmm 01-Feb-19 08:16 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20190201_164756-2B775.jpg 01-Feb-19 08:16 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20190201_171505-E4AE0.jpg 01-Feb-19 08:48 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/unknown-BCBA6.png 01-Feb-19 08:48 AM uhh boy 01-Feb-19 08:49 AM Translation? 01-Feb-19 08:49 AM I just bought 10 Hornets 01-Feb-19 08:49 AM with "only" $101.95 shipping 01-Feb-19 08:49 AM Oh nice 01-Feb-19 08:51 AM cheapest offer I could get 01-Feb-19 08:51 AM at least I got it down by ~$50 of what the seller was originally asking 01-Feb-19 10:31 AM It's something, I guess 01-Feb-19 10:31 AM are the nixies dead, or the drivers for them dead? 01-Feb-19 10:33 AM The nixies are dead, the glass is broken 01-Feb-19 10:33 AM we maybe have two spare ones 01-Feb-19 10:37 AM wires @Nixie up to a pulse cap for defib 01-Feb-19 11:19 AM closes circuit on @GigaSquirrel ears 01-Feb-19 11:19 AM can't be much worse than the music I usually listen to 01-Feb-19 12:41 PM Those look like IN-12 nixies, super common from the motherland 01-Feb-19 12:41 PM should be-able to get them cheap :P 01-Feb-19 12:44 PM russian anthem starts playing 01-Feb-19 10:42 PM heh i bought them also from alamedaauction 01-Feb-19 10:42 PM hornets 02-Feb-19 01:17 AM got all of mine from them, just a good seller 02-Feb-19 03:10 AM @N00N btw, why didn't you say that you've got some? 02-Feb-19 03:10 AM welcome to the club! 02-Feb-19 03:10 AM or rather 02-Feb-19 03:10 AM society 02-Feb-19 03:12 AM hehe \o/ 02-Feb-19 03:12 AM still waiting for them 02-Feb-19 03:13 AM ah, well 02-Feb-19 03:14 AM i ordered 4(?) from another seller who declared them as clean/unused 02-Feb-19 03:15 AM oh, sweet 02-Feb-19 03:15 AM sounds like there's a "but" coming 02-Feb-19 03:17 AM hope they all arrive nxt week 02-Feb-19 03:17 AM (in a usable condition) 02-Feb-19 03:17 AM ah ^^ 02-Feb-19 03:17 AM well, still some time to order replacement caps 02-Feb-19 03:18 AM yeah that would be usable if that's all to fix 02-Feb-19 03:18 AM yep! 02-Feb-19 03:18 AM btw, it appears that low ESR is a must for the caps, currently trying some el cheapo caps with twice the capacity and it still won't start 02-Feb-19 03:18 AM plus there's some audible coil whine 02-Feb-19 03:21 AM is it the cap for a boost converter? 02-Feb-19 03:21 AM SMPS with regular transformers 02-Feb-19 03:21 AM https://www.mouser.de/ProductDetail/United-Chemi-Con/EMZJ350ADA221MHA0G?qs=Yk42LiOZU8Tur33xkorC3g%3d%3d Those should be the right caps 02-Feb-19 07:18 AM @N00N If any of them where not repairable, can I have their KF ports? 02-Feb-19 11:06 AM @Nixie yeah 02-Feb-19 11:58 AM 03-Feb-19 01:06 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20190203_090618-1DD36.jpg 03-Feb-19 01:06 AM @AdamMcCombs 03-Feb-19 03:22 AM happy little ion gauge 03-Feb-19 03:22 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20190203_122140-02808.jpg 03-Feb-19 07:27 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20190203_162344-12CA2.jpg 03-Feb-19 07:27 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20190203_162303-4B996.jpg 03-Feb-19 07:27 AM Yay :3 03-Feb-19 09:14 AM neat! 03-Feb-19 10:53 AM this is a test 03-Feb-19 10:57 AM I already did that 03-Feb-19 10:57 AM must have been before the update for me 04-Feb-19 01:52 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20190204_105110-C1D79.jpg 04-Feb-19 01:52 AM This is going to be fun 04-Feb-19 02:12 AM XD 04-Feb-19 02:15 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20190204_111403-D36B3.jpg 04-Feb-19 02:15 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20190204_111327-BA802.jpg 04-Feb-19 02:15 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20190204_111349-510C9.jpg 04-Feb-19 02:15 AM Got something in the post today :3 04-Feb-19 02:22 AM "post" 04-Feb-19 05:07 AM XDDDDD 04-Feb-19 05:07 AM What is it? a vacuum something, I guess. 04-Feb-19 05:45 AM a pumping setup, rotary pump + turbo + full range gauge 04-Feb-19 07:03 AM envy 04-Feb-19 07:03 AM Congrats! 04-Feb-19 07:23 AM yea those little pump stations are awesome, but ussually go for big monz 04-Feb-19 10:06 AM @Nixie oh, you need KF flanges? for welding or just screw it? :-D 04-Feb-19 10:19 AM I don't need them. But I figure people won't try much with dead hornets, so I can get some feedthroughs to experiment with. 04-Feb-19 10:19 AM Without having to buy hornets themselves. 04-Feb-19 10:21 AM using the feedthroughs... hmmm. oh well, i guess, with hornets it's a bit easier. the typical tubes in the stingers (and many other more expensive gauges) have that damn 90° bend and are virtually unusable as feedthroughs... 04-Feb-19 10:21 AM but i simply sawed the KF off of the broken ones and stored them for later use as weld-on flanges. 04-Feb-19 10:22 AM Okay 04-Feb-19 10:22 AM 8h later... 04-Feb-19 10:22 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20190204_185344-0291F.jpg 04-Feb-19 10:22 AM I had to clean and repair everything 04-Feb-19 10:23 AM On the topic of diy feedthroughs i have been wanting to experiment with epoxy casting using weld on kf balnks. I think it should be doable. 04-Feb-19 10:23 AM Looking good! 04-Feb-19 10:23 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20190204_115204-B464E.jpg 04-Feb-19 10:23 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20190204_115415-FC50D.jpg 04-Feb-19 10:23 AM I guess that's not how a turbo bearing should look like 04-Feb-19 10:23 AM I still don't know what happened to that thing 04-Feb-19 10:24 AM it's just a one-sided bearing for horizontal mounting of the pump ;-D 04-Feb-19 10:24 AM Luckily the balls are still fine and the rotor is also undemaged 04-Feb-19 10:24 AM After complete teardown, cleaning and reassembly it's working fine again :3 04-Feb-19 10:24 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20190204_130325-3998E.jpg 04-Feb-19 10:24 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20190204_122924-8682F.jpg 04-Feb-19 10:24 AM Also, the Balzer gauge was completely coated in oil and debris and the membrane pre-pump was broken, too 04-Feb-19 10:26 AM ahh, that's a TPH 52 or something? 04-Feb-19 10:26 AM TSH 064 04-Feb-19 10:26 AM and the gauge lookes like PKR251 or similar 04-Feb-19 10:26 AM 064, right. just dropped one of those from ~1m height a month ago in a hamburg subway train :-D 04-Feb-19 10:28 AM Orrrrr 04-Feb-19 10:28 AM I hope it was broken in the first place? 04-Feb-19 10:28 AM don't know, but it was at least not complete and not working 04-Feb-19 10:28 AM Do you need a controller? 04-Feb-19 10:28 AM I got a spare tmp controller 04-Feb-19 10:28 AM i was just standing there and suddenly the damn handle of the bag broke 04-Feb-19 10:28 AM The unit on the Righ 04-Feb-19 10:28 AM Should work for most smaller Pfeiffer tmps 04-Feb-19 10:29 AM a controller would be great... i have 13 different turbo pumps in storage and no way to test them XD 04-Feb-19 10:29 AM they're probably all dead, but hey - they were cheap... 04-Feb-19 10:30 AM Woah 04-Feb-19 10:30 AM Pfff, I don't see how you break a pump beyond repair :D 04-Feb-19 10:31 AM I heard niklas is now a pro in turbo pump repair 04-Feb-19 10:31 AM I literally restored a crashed pump to full operation 04-Feb-19 10:31 AM @AdamMcCombs yeah, definitely we have to do some tests aroun that too. What kind of epoxy? (I was thinking on using JB-weld) 04-Feb-19 10:32 AM @Nixie vor high vacuum we use Uhu Endsieg 04-Feb-19 10:32 AM and anotter one, we repaired @Nixie pump :3 04-Feb-19 10:32 AM I like jb weld for some stuff but it seems so ridged that it can cause problems. 04-Feb-19 10:32 AM Im looking for something with just a bit more give so micro leaks dont develop around wires 04-Feb-19 10:33 AM silicone! 04-Feb-19 10:37 AM Noted, Pan Da. 04-Feb-19 10:37 AM ridged? what do you mean? 04-Feb-19 10:38 AM It doesn't flex very much so it tends to develop micro leaks 04-Feb-19 10:40 AM Ah. Hm...we might have to test Pan Da's Uhu Endsieg 04-Feb-19 10:40 AM You know, it isn't actually called "Endsieg" 04-Feb-19 10:41 AM No idea. XD 04-Feb-19 10:41 AM Just another stupid Germans joke 04-Feb-19 10:41 AM XDDDDDD 04-Feb-19 10:42 AM https://www.uhu.de/de/produkt.3999 04-Feb-19 10:44 AM 04-Feb-19 10:54 AM you didn't tell me you completly destroyed my fully functional turbo pump @Pan Da ?! what are you talking about, it had missing part, it worked 100%!!! 04-Feb-19 10:54 AM yeah, but it wasn't for him and he's already got enough, right? 04-Feb-19 10:55 AM @Koelzer , quick, drink some vodka, your inner russian is trying to break through! 04-Feb-19 10:55 AM @niklas eeyup. and i actually had to google it to find out what its real name is. :-D 04-Feb-19 11:03 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20190204_200259-9E0C0.jpg 04-Feb-19 11:03 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20190204_200307-C4158.jpg 04-Feb-19 11:03 AM @Pan Da some of the equipment that was also given to me... Do you have use for that spare TMP controller? 04-Feb-19 11:07 AM Lovely! 04-Feb-19 11:11 AM @niklas if i only knew if that controller works with one of my pumps... 04-Feb-19 11:11 AM Do you have the manual for the 1001 and 1002 controllers? 04-Feb-19 11:21 AM No 04-Feb-19 11:21 AM Haven't tested them yet 04-Feb-19 03:19 PM idly wonders how much Agilent TorrSeal epoxy actually costs. 04-Feb-19 03:19 PM Because that seals things well 04-Feb-19 03:30 PM about 100€ per catridge 04-Feb-19 03:33 PM :/ 04-Feb-19 03:33 PM Tho one can seal a lot of things with a single set. 04-Feb-19 03:33 PM So not horrific. 04-Feb-19 03:33 PM At least one does not need to buy a 5liter can of it with an expiry date. 04-Feb-19 03:37 PM you can use lots of other epoxies tho 04-Feb-19 03:37 PM you just have to look into some of the various compatibility charts 04-Feb-19 03:48 PM Ok 05-Feb-19 01:53 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/lIbIkjPd-6980B.png 05-Feb-19 01:53 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/2bWwd3mB-A6E88.png 05-Feb-19 01:53 AM soldered using my trusty NON-temp-controlled heat gun. 05-Feb-19 01:53 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/8qfYus7e-BCF9A.png 05-Feb-19 01:53 AM And no, I didn't fry the board. 05-Feb-19 01:53 AM And the circuit also works, wich is a plus. 05-Feb-19 01:53 AM XDDDD 05-Feb-19 02:52 AM May I ask, why OSHpark? 05-Feb-19 02:52 AM Aren't they like super expensive? (At least for normal fr4) 05-Feb-19 03:30 AM oh, nice, at least a nice steinel heat gun 05-Feb-19 05:47 AM They migh be expensiver-ish to a degree, but since you only have to order 3, AND they offer very cheap shipping, it beats chinese services if you only really need prototypes (that is, a few boards only). 05-Feb-19 05:47 AM AND they offer flexy pcb service. I got my first set of 3 flexies for 18$, whereas chinese made me buy 10x for 96$ 05-Feb-19 05:47 AM (once you got into the hundreds boards the price dropped, but that's outside the scope) 05-Feb-19 05:47 AM Nice heat gun, but not the best thing to do what I did. I just happen to have tons of experience and can make it work, but it is very unadvisable. XDDDDDDDD 05-Feb-19 05:47 AM Oh, and the OSHpark Fr4's costed 1.9$ shipped per 3 boards. 05-Feb-19 06:52 AM Oh, that's okay 05-Feb-19 11:52 PM Okay, very very random question, but we have lots of expertise in many areas and maybe someone has a clue. 05-Feb-19 11:52 PM Does anyone know how the semi rigid parts like the top of this case, are made? Like, what materials or something? 05-Feb-19 11:52 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/UT807_1_UT807-3-045FB.png 05-Feb-19 11:52 PM Those feel like cloth on the external part but probably are some type of foam inside, like a composite. 05-Feb-19 11:52 PM My guess is that there is a base material that has the foam core and expandable cloth on both sides, and is heat formed into a mold. But have never found such material. 06-Feb-19 12:06 AM I would guess they use something like a "hot press" and/or vacuum forming 06-Feb-19 12:21 AM Yeah, same. It's the materials what eludes me. 06-Feb-19 12:37 AM @Pan Da can you sent me a picture / list of you tmps later? 06-Feb-19 12:37 AM I would like to give you the controller in exchange for a broken pfeiffer tmp where I can get a replacement bearing from 06-Feb-19 01:04 AM nixie, maybe polycarbonate? how hard does it sound if you knock against it? 06-Feb-19 01:04 AM oh, foam, you said 06-Feb-19 01:04 AM foma is mostly polyurethane afaik 06-Feb-19 01:59 AM "foma"? 06-Feb-19 01:59 AM (foam?) 06-Feb-19 06:28 AM Okay, now I feel dumb. I just found this. 06-Feb-19 06:28 AM https://www.youtube.com/watch?v=J4cEQs-kvGM 06-Feb-19 06:28 AM tl:dr eva foam with fabric on both sides, heated to +150ºC and pressure molded on dies. 06-Feb-19 06:28 AM I am pretty sure that a wood plug can be used for small production. 06-Feb-19 06:28 AM Now I need eva foam and a way to actually join those two together (contact cement doesn't look like what is needed...not sure if just heat can be used). 06-Feb-19 06:28 AM Fabric might be nylon. 06-Feb-19 02:55 PM Yayy new junk 06-Feb-19 02:55 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20190207_005053-25E3A.jpg 06-Feb-19 02:55 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20190207_005333-B4215.jpg 06-Feb-19 02:55 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20190207_005112-9C0EE.jpg 06-Feb-19 03:05 PM ping @Pan Da ^^ 06-Feb-19 03:07 PM ah 06-Feb-19 03:07 PM forgot to answer 06-Feb-19 03:07 PM will make a list next time i am there ^^ 06-Feb-19 03:37 PM great, thanks! 07-Feb-19 05:34 AM awesome analog gauge @rfs ! 07-Feb-19 05:38 AM Ha, I now know your twitter handle @rfs 08-Feb-19 01:34 AM Yeah! 08-Feb-19 01:34 AM just got a letter from customs 08-Feb-19 01:34 AM tome to go and get the hornets \o/ 08-Feb-19 01:35 AM yay 08-Feb-19 01:35 AM i've got the letter on fr last week 08-Feb-19 01:35 AM and autherized dhl to do it for me 08-Feb-19 01:35 AM still waitin ️ 08-Feb-19 01:40 AM oof, isn't that like 30€? 08-Feb-19 01:40 AM not sure last time it was like 12 euros 08-Feb-19 01:40 AM and waiting at customs takes hours ️ 08-Feb-19 01:41 AM the office here takes an hour to get to, but they're usually really nice and fast 08-Feb-19 01:41 AM i know they write 28.50 euro 08-Feb-19 01:42 AM yep 08-Feb-19 01:43 AM here youve 2-3h queueing time 08-Feb-19 01:43 AM ouch 08-Feb-19 01:43 AM and then 30m processing time 08-Feb-19 01:44 AM ffs dyno 08-Feb-19 01:44 AM inkl driving its 0.5 workdays app 08-Feb-19 01:44 AM wth are they doing there O.o 08-Feb-19 01:44 AM ah 08-Feb-19 01:44 AM well 08-Feb-19 01:44 AM you see 08-Feb-19 01:44 AM I don't work 08-Feb-19 01:47 AM yeah ok but your nerves 08-Feb-19 01:47 AM ruined since years 08-Feb-19 01:48 AM theyve no chairs - the crowd waits on the stair 08-Feb-19 01:48 AM s 08-Feb-19 01:48 AM everything else would be pure luxus 08-Feb-19 01:48 AM ehehehe 08-Feb-19 01:48 AM here they have the same benches as those metal ones on train stations 08-Feb-19 01:48 AM for like 5 or 6 persons 08-Feb-19 01:48 AM but I've never seen more than that wait there 08-Feb-19 01:49 AM ok there is one bench with two seats 08-Feb-19 01:49 AM which is as helpfull as no bench 08-Feb-19 01:50 AM yep no one dares to use it 08-Feb-19 01:52 AM but yeah, if it was like that here I probably would also just pay the post office to do that for me 08-Feb-19 02:45 AM Here they emoved the local customs offices and everything just goes from the capital, so you can either go there from the rest of spain, or pay Correos the fee for processing it. 08-Feb-19 03:24 AM awww yeah 08-Feb-19 03:24 AM payed the lowest possible rate at customs! 08-Feb-19 04:39 AM Great! 08-Feb-19 04:41 AM http://tubetime.us/wp-content/uploads/2018/10/Ideal-Op-Amp-Datasheet.pdf 08-Feb-19 05:48 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20190208_144809-BE01C.jpg 08-Feb-19 06:06 AM 08-Feb-19 06:44 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20190208_154404-70C38.jpg 08-Feb-19 06:51 AM I opened them all and they look fine, exept fore some deep fried caps 08-Feb-19 09:13 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/Dy5bGOVXgAEz6DN-7661D.png 08-Feb-19 10:57 AM lol 08-Feb-19 10:57 AM also @GigaSquirrel oh wow thats the first time I've seen roasted caps like that. I don't think either of the two I got were like that... at-least I know one I didn't notice any roasted caps 08-Feb-19 11:13 AM This is what I'm planing on testing my hornets against. 08-Feb-19 11:13 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20190208_181135-C201D.jpg 08-Feb-19 11:13 AM Model plate 08-Feb-19 11:13 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20190208_181158-D8B7F.jpg 08-Feb-19 11:13 AM And pull vacuum with this 08-Feb-19 11:13 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20190208_181255-8CE07.jpg 08-Feb-19 11:13 AM Sadly not my own toys, but those of R&D at work. 08-Feb-19 11:15 AM nice to be-able to use that though to compare 08-Feb-19 11:15 AM Yep! 08-Feb-19 11:15 AM One can also see why the unit with the model plate shown is an R&D unit. 08-Feb-19 11:15 AM The connector is double-plus bad, due to having only 0.7mm of material at the bottom fixing the screw to it. 08-Feb-19 11:15 AM Even checked the drawings of it 08-Feb-19 11:15 AM It's so bad that one can break it of by torquing the connector with bare fingers and a PH2 bit. 08-Feb-19 11:15 AM Not impressed. 08-Feb-19 11:15 AM Reportedly current production is better and so are other models. But it still sucks. 08-Feb-19 12:17 PM wow rip 09-Feb-19 02:22 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20190208_231327-D9AD3.jpg 09-Feb-19 02:22 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20190209_020146-5DF12.jpg 09-Feb-19 02:22 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20190209_011100-D61DF.jpg 09-Feb-19 02:22 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20190209_011534-31BB3.jpg 09-Feb-19 09:52 AM I was about ready to ask you how the weather was that way :P 09-Feb-19 11:14 AM ?cat 09-Feb-19 11:14 AM Found one! 09-Feb-19 11:39 AM ?turbopump 09-Feb-19 11:39 AM Xd 09-Feb-19 11:45 AM still nothing 09-Feb-19 11:45 AM :< 09-Feb-19 11:46 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/fqv5cD0BUGUt1Kb1hapTaLgBo3KsDVlS6wrxHY-WfD-CC44E.png 09-Feb-19 11:50 AM oof 09-Feb-19 11:50 AM no gore! 09-Feb-19 11:55 AM I can google broken TMP's too 09-Feb-19 11:55 AM But if you want gore, I can give you two cups 09-Feb-19 11:55 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/rotor1-FB1F7.png 09-Feb-19 11:55 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/rtside-2BD62.png 09-Feb-19 11:55 AM There you go. 09-Feb-19 12:08 PM this looks weird 09-Feb-19 12:08 PM what is it 09-Feb-19 12:09 PM *was it 09-Feb-19 12:10 PM An ultracentrifugue. 09-Feb-19 12:10 PM That rotor is probably pure titanium 09-Feb-19 12:10 PM auaaaaaa 09-Feb-19 12:10 PM like 09-Feb-19 12:10 PM the uranium kind? 09-Feb-19 12:11 PM no, the uranium separators are different, afaik 09-Feb-19 12:11 PM This is for biological samples. 09-Feb-19 12:11 PM isotope separation of humans? xD 09-Feb-19 12:12 PM C14 via gravitational separation? 09-Feb-19 12:13 PM yep! 09-Feb-19 12:21 PM 1.000.000g's remind me of the Hyperion novel. 10-Feb-19 05:17 AM https://www.youtube.com/watch?v=_nPiHhdRfjc I can smell the ozone from here 11-Feb-19 03:33 PM Anyone got a good source for resistors with 50-100 kOhm, ~100W and ~20 kV? 11-Feb-19 03:33 PM and by "good" i mean "<100€" 11-Feb-19 03:42 PM I wonder if ur4ll.net has anything suitable. 11-Feb-19 03:47 PM uhh, didn't know them 11-Feb-19 03:47 PM thanks! 11-Feb-19 03:53 PM sovtube might also have something. 11-Feb-19 03:53 PM In general the sellers selling old soviet tubes ofthen have other weird surplus 11-Feb-19 03:54 PM I checked the usual ones 11-Feb-19 04:26 PM So uh... I just had an interesting thought... 11-Feb-19 04:26 PM does stainless steel galling create a vacuum tight seal? 12-Feb-19 02:35 AM Yes, we should @Nixie 12-Feb-19 03:56 AM Hum...i doubt it. As it is not whole surface contact but random scattered high points in the surface. 12-Feb-19 04:21 AM Grünkohl mit Mettenden 12-Feb-19 04:21 AM Very Münsterländerisch :3 12-Feb-19 04:42 AM Whey, first 3 gauges are going to the post office today! 12-Feb-19 07:11 AM Nice! 12-Feb-19 07:20 AM aaand they're gone 12-Feb-19 07:39 AM @Conmega besides, if you want to vacuum seal stainless to stainless, you can TIG it, laser weld and braze. 12-Feb-19 07:40 AM Tig welding with out a leak detector is bold... 12-Feb-19 07:46 AM like this? 12-Feb-19 07:46 AM https://tenor.com/view/laughing-lol-lmao-lmaorofl-rofl-gif-5070201 12-Feb-19 07:46 AM ah, damn, that's cursive 12-Feb-19 07:46 AM a great opportunity lost forever. 12-Feb-19 07:46 AM (gif still applies) 12-Feb-19 07:48 AM I guess i'm thinking for the much higher vacuum work. The numbers I was told for tig rework were high 12-Feb-19 07:48 AM You can edit markup 12-Feb-19 07:49 AM Yeah. Surely if you have TIG welded something thick and there is a pinhole somewhere...that is going to run all the way into the weld, and that's worst than bad. 12-Feb-19 07:49 AM (yeah, but you would knew I failed, so there is no point in correcting that, just endure it) 12-Feb-19 07:50 AM But through the power of admin we can make this all disappear! 12-Feb-19 07:50 AM Naaaaaa 12-Feb-19 07:50 AM In some months we will see how bold is it to weld, when I try to assemble the dodecagonal vacuum chamber. 12-Feb-19 07:51 AM Yeah i was thinking about that... 12-Feb-19 07:51 AM I know. 12-Feb-19 07:51 AM What vacuum do you want? 12-Feb-19 07:51 AM not that much. 12-Feb-19 07:51 AM otherwise I would need CF flanging and such. 12-Feb-19 07:52 AM If its bad enough to cause a problem an ion gauge and alcohol should be enough 12-Feb-19 07:52 AM It will be a pain but... 12-Feb-19 07:52 AM Yeah cf and some much fancier view ports 12-Feb-19 07:53 AM It is 25% aesthetics, 25% because I can and 50% because I will need a bigger chamber than mine at some point. 12-Feb-19 07:53 AM I feel like that ratio is generous 12-Feb-19 07:53 AM really? I'm a fashion victim, if you haven't notticed. 12-Feb-19 07:54 AM Oh i was thinking more than 25 for the first two 12-Feb-19 07:54 AM so, 12,5 / 12,5 and 75%? 12-Feb-19 07:54 AM Nah like 40 40 20 12-Feb-19 07:54 AM ROFL 12-Feb-19 07:54 AM That I can accept. 12-Feb-19 07:54 AM (ah, you mean "more than"? instead of "more that") 12-Feb-19 07:54 AM (saw your correction in real time) 12-Feb-19 07:55 AM I dont know what you are talking about 12-Feb-19 07:55 AM XDDDDD 12-Feb-19 07:55 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/unknown-F69B9.png 12-Feb-19 07:55 AM Nothing to see here 12-Feb-19 07:56 AM So you consider that I don't need a biger chamber that much, in the end. 12-Feb-19 07:56 AM Am I not worthy? 12-Feb-19 07:56 AM No you do 12-Feb-19 07:56 AM Its just you could buy one 12-Feb-19 07:56 AM So the motivation behind this chamber... 12-Feb-19 07:57 AM and there is where you are (respectfully) wrong. 12-Feb-19 07:57 AM remember I'm in southern spain 12-Feb-19 07:57 AM no vacuum chambers to buy in here, and certainly shipping even from Germany is going to cost an arm and a leg. 12-Feb-19 07:57 AM Its that bad? 12-Feb-19 07:58 AM for the vacuum chambers for sale there, you are probably looking at 100+ € in shipping (remember my economic status is not the same as yours) 12-Feb-19 07:58 AM plus the chamber price 12-Feb-19 07:58 AM AND they are going to be weirdly shaped for whatever they where made. 12-Feb-19 07:58 AM Pricewise for the dodecagonal I'm looking at 300€ in materials, wich is not that much, and machining and welding time. 12-Feb-19 07:58 AM but I'll have a chamber to my liking, with no weird shapes. 12-Feb-19 07:58 AM plenty of ports for tools and instruments for sure. 12-Feb-19 08:00 AM Because a dodecagonal is not a weird shape 12-Feb-19 08:00 AM so how about 33, 33, 34%? 12-Feb-19 08:00 AM (I meant weird disposition of ports) 12-Feb-19 08:00 AM I know... 12-Feb-19 08:00 AM Its a very cool chamber 12-Feb-19 08:00 AM IF it works. 12-Feb-19 08:00 AM Well 12-Feb-19 08:00 AM When gas expands into a vacuum it gets colder 12-Feb-19 08:01 AM but yes, that can win prettiest vacuum chamber contests easily. 12-Feb-19 08:01 AM so 12-Feb-19 08:01 AM Even if you have a leak it will be a cold chamber 12-Feb-19 08:01 AM XDDD, I am confident I can weld it well enough. 12-Feb-19 08:01 AM as long as I don't dip the electrode, ever. 12-Feb-19 08:01 AM Will have to find a smallish turbo that can directly couple with the chamber. 12-Feb-19 08:01 AM (imagines putting turbos all around the chamber...what performance could that have...) 12-Feb-19 08:01 AM By the time I'm attempting that, I should have funds to ask around for help sourcing such turbo, I think. 12-Feb-19 08:01 AM (so, you ok with the 33, 33, 34%?) 12-Feb-19 08:04 AM Oh I'm ok with whatever 12-Feb-19 08:05 AM ahm...m'kay. 12-Feb-19 10:50 AM all that snow is becoming slush with this rain :/ 12-Feb-19 10:51 AM and tonight it will freeze 12-Feb-19 10:51 AM and turn in to ice with a mirror finish 12-Feb-19 10:51 AM forefacst is saying just above freezing 12-Feb-19 10:51 AM but, tomorrows low is below freezing 12-Feb-19 10:51 AM good luck :D 12-Feb-19 10:51 AM have fune 12-Feb-19 10:51 AM fun, too 12-Feb-19 10:52 AM oh, here we've still got some snow, but are constantly above 0 12-Feb-19 10:52 AM so no issues there 12-Feb-19 10:52 AM it feesl actually quite warm 12-Feb-19 10:53 AM oh wow, they lowered the price of the jig borer... hrmmmmm 12-Feb-19 10:53 AM do it! 12-Feb-19 10:53 AM I should offer them something at this point, ti'll attract a bit of attention soon enough 12-Feb-19 10:53 AM shipping will be almost as much as the item 12-Feb-19 10:53 AM and will still be worth it 12-Feb-19 10:53 AM micron accuracy 12-Feb-19 11:04 AM oh myy 12-Feb-19 11:04 AM is this a thing you need or just want? 12-Feb-19 11:06 AM well, I want to make watches, not just fix them, and it's certainly better than most milling machines out there for the purpose of locating and making holes, etc 12-Feb-19 11:06 AM so.. need? 12-Feb-19 11:09 AM oh, nice 12-Feb-19 11:12 AM the lathes I am looking at is a Lorch Junior for watchmaking, and a Hardinge HLV-H for a bit bigger, and the nice screw cutting stuff it can do 12-Feb-19 12:19 PM Do it, do it, do it 12-Feb-19 12:20 PM heh, it's on the list, I xfered some money from etrade from selling some stocks for it 12-Feb-19 12:20 PM https://giphy.com/gifs/starwars-star-wars-episode-3-3o84sw9CmwYpAnRRni 12-Feb-19 12:20 PM may take a few days, I should offer the amount though 12-Feb-19 12:20 PM I have enough to get it, but yeah, it's more of an assurance thing 12-Feb-19 07:09 PM awaiting word if school is cancelled or not.. most side streets are just slush.. hard for many cars to get traction 12-Feb-19 07:09 PM I imagine campus itself is a mess 12-Feb-19 08:30 PM late start, 11am 13-Feb-19 11:34 AM http://www.ireneposch.net/the-embroidered-computer/ 13-Feb-19 11:34 AM wow 13-Feb-19 12:10 PM WOW 13-Feb-19 12:10 PM just wow 13-Feb-19 12:27 PM Yeah, saw it a bit ago ln twitter (and retweeted it, obviously) 13-Feb-19 11:33 PM For anyone who doesn't have a valentine, here, a lasercut rose in a vintage punchcard: 13-Feb-19 11:33 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/DzWVZK-XQAEq5pS.jpg_large-7D1AF.jpg 13-Feb-19 11:33 PM Morning! \o/ 14-Feb-19 05:59 AM lol morning, dunno why it has to be laser cut, I have a keypunch in the basement... rolls eyes 14-Feb-19 06:57 AM I don't. doublebackflips eyes 14-Feb-19 12:33 PM i don't, but i know where i can get access to one... and another one... and maybe even a third one if it hasn't been thrown out. 14-Feb-19 12:33 PM oh, and maybe boxes of blank cards, but not sure about that 14-Feb-19 12:33 PM but no lasercutter. 14-Feb-19 12:33 PM XD 14-Feb-19 12:36 PM Unnapreciative maggots. flips table 14-Feb-19 12:37 PM @Pan Da I can screw the laser back onto my printer 14-Feb-19 12:44 PM @Nixie nonono, i like the idea. i just don't have a lasercutter ^^ 14-Feb-19 12:46 PM puts table back 14-Feb-19 12:47 PM thanks puts flowers on table 14-Feb-19 12:48 PM removes tablecloth 14-Feb-19 12:48 PM Tadaa! 14-Feb-19 12:48 PM mumble mumble Picks flowers and broken vase off the floor 14-Feb-19 12:49 PM removes carpet 14-Feb-19 12:49 PM Tadaa! 14-Feb-19 12:50 PM xD 14-Feb-19 12:50 PM https://tenor.com/view/haters-gonna-hate-wall-e-hoola-hoop-gif-3418874 14-Feb-19 12:51 PM hahahahaha 14-Feb-19 12:51 PM and who's gonna put in the new flooring now that he's removed the oldcarpet? 14-Feb-19 12:52 PM removes important structural pillars 14-Feb-19 12:52 PM Tadaa! 14-Feb-19 12:52 PM https://tenor.com/view/wall-e-gif-9479245 14-Feb-19 12:56 PM is there anything useful one can do with empty PLA spools? 14-Feb-19 12:57 PM I saw some used them with 3D printed boxes that fitted inside the spools, but it seemed like a bit wasteful. 14-Feb-19 12:57 PM also, coil cables. 14-Feb-19 12:59 PM yeah, very space inefficient 14-Feb-19 12:59 PM and I've got proper sorting boxes for that 14-Feb-19 01:00 PM I haven't emptied one yet. ^^U 14-Feb-19 01:00 PM been through 5-10 by now 14-Feb-19 01:01 PM XDDDDD 14-Feb-19 01:01 PM I print small pieces. 14-Feb-19 01:02 PM I don't 14-Feb-19 01:04 PM yes you do 14-Feb-19 01:04 PM the chainmail for example 14-Feb-19 01:04 PM very small parts 14-Feb-19 01:04 PM hundreds of them 14-Feb-19 01:06 PM making one big part! 14-Feb-19 01:13 PM I want to see that 14-Feb-19 01:13 PM can I? 14-Feb-19 01:13 PM I handwove chainmail for a friend. 14-Feb-19 01:13 PM (some time ago, I mean) 14-Feb-19 01:14 PM sure, one minute 14-Feb-19 01:17 PM i have parts of a 99% hand woven chain mail shirt somewhere upstairs... sadly my supplier of steel wire closed down before it was finished :-( 14-Feb-19 01:17 PM looks like you didn't buy enough 14-Feb-19 01:18 PM very interesting! 14-Feb-19 01:18 PM yeah, but i had no need for two truckloads of fence materials... 14-Feb-19 01:18 PM I left 25kg of steel wire when I moved to here, I could not fit them in the truck. 14-Feb-19 01:20 PM naw :-( 15-Feb-19 01:23 AM Sooo 15-Feb-19 01:23 AM I'm getting access to a pretty decent neutron source (3.7 GBq AmBe) next thursday, to test my detectors 15-Feb-19 01:23 AM is there anything you want to see be done with it?# 15-Feb-19 01:23 AM Any fun experiments? 15-Feb-19 02:49 PM New watch.. https://imgur.com/a/aGXPmJW 15-Feb-19 02:49 PM the robot is aluminium foil 15-Feb-19 03:07 PM it looks cool! 15-Feb-19 03:07 PM but I'd stare at it for 5 minutes and still don't know what time it is 15-Feb-19 03:12 PM did you click the link to the album of photos? easier to understand than the one image discord shows 15-Feb-19 03:13 PM Yep 15-Feb-19 03:13 PM there's just so much to look at 15-Feb-19 03:13 PM multiple levels 15-Feb-19 03:14 PM is it an electric or mechanical watch? 15-Feb-19 03:14 PM automatic mechanical 15-Feb-19 03:14 PM chinese movement from what I understand 15-Feb-19 03:14 PM will see how well it keeps the time.. no seconds hand, so hard to compare 15-Feb-19 03:14 PM will stick it on timing machines at school in a few days 15-Feb-19 03:16 PM awesome! 15-Feb-19 03:25 PM oh, and on the topic of awesome 15-Feb-19 03:25 PM just got a job offer for the semester break 15-Feb-19 03:25 PM decommissioning of an old storage for radioactive samples and a couple of hot cells 15-Feb-19 03:25 PM and I am so hyped 15-Feb-19 11:47 PM oooo 15-Feb-19 11:47 PM that sounds like an interesting time :o 16-Feb-19 12:04 AM Woah 16-Feb-19 12:04 AM Ah, hours on the top red number spot and minutes inside the heart. Interesting but not my cup of tea. @GigaSquirrel you need more coffee, or sleep (seeing the hour at what you looked at it. 16-Feb-19 12:21 AM the red 'spot' is meant to be the japanese sun 16-Feb-19 01:11 AM @Nixie I always need more 17-Feb-19 03:19 AM https://www.youtube.com/watch?v=qqv7TvDfqfU 17-Feb-19 03:22 AM now i want to build a small cyclotron 17-Feb-19 03:22 AM (again) 17-Feb-19 03:23 AM you again have the urge to build one or do you want to build another one? 17-Feb-19 03:24 AM i feel the urge again, never build one (not yet!111) 17-Feb-19 03:25 AM huh, I never stopped wanting to build one xD 17-Feb-19 03:27 AM and i guess, the radiation shield bunker is not just for fun 17-Feb-19 03:29 AM Yep 17-Feb-19 03:48 AM I got a bicyclotron. 17-Feb-19 03:54 AM single speed? 17-Feb-19 03:54 AM single speed hipster style bicyclotron with a hefty beard 18-Feb-19 04:23 AM @GigaSquirrel that's cool. Surprised the whole thing just swings open for servicing. I guess it needs to be cleaned regularly? I see some gunk in there. It seems they usually accelerate negative hydrogen or deuterium ions. Just googled "pet radiopharmaceutical production". There's a bunch of stuff from the medical viewpoint, not so much about details of production. 18-Feb-19 04:24 AM I don't know anything about that device, I just found the video and thought people here might find it interesting ^^ 18-Feb-19 04:24 AM well, I don't know anything about accelerators at all basically 18-Feb-19 04:24 AM applied ion is our go to on that topic 18-Feb-19 05:01 AM missing a D. 18-Feb-19 05:01 AM XDDDD 18-Feb-19 05:18 AM oh, no, I've got plenty of D 18-Feb-19 11:14 AM ROOOOOOOOOOFL 18-Feb-19 01:37 PM https://youtu.be/Lg73GKm7GgI 18-Feb-19 01:37 PM LMAOED until mt dogs woke up. 18-Feb-19 01:51 PM OH MY GOD 18-Feb-19 01:51 PM that's great 18-Feb-19 02:10 PM 18-Feb-19 06:48 PM https://imgur.com/a/V8MoCn1 18-Feb-19 10:33 PM I tried lobster once, thought it would taste like shrimp but just be much more of it at once. I was totally dissapointed. 19-Feb-19 12:16 AM https://www.youtube.com/watch?v=VxxYqE4Gil8 19-Feb-19 01:20 AM https://www.youtube.com/watch?v=SrRbg3_Lk7c https://www.youtube.com/watch?v=1eY9KfODALc 19-Feb-19 01:33 AM Mark IV kills all life in the house 19-Feb-19 01:34 AM some real reactor jealousy happening here 19-Feb-19 01:51 AM implies killing all life in the house would be a bad thing, right? 19-Feb-19 01:52 AM ehhh 19-Feb-19 01:52 AM you have to get rid of roaches in some way 19-Feb-19 01:52 AM so why not the nuclear way 19-Feb-19 01:57 AM maybe not such a bad idea? 19-Feb-19 01:59 AM :D 19-Feb-19 01:59 AM omg 19-Feb-19 01:59 AM just imagine 19-Feb-19 01:59 AM instead of fuming they put a crazy hot source into your home and leave it there for a week, after everything got like 10 kGy you won't have any issues with anything living 19-Feb-19 02:04 AM yep 19-Feb-19 02:04 AM "even mold" 19-Feb-19 02:04 AM "total pest control ltd" 19-Feb-19 02:04 AM "go nuclear" 19-Feb-19 02:04 AM "kills everything - everywhere" 19-Feb-19 02:04 AM "even mold ;)" 19-Feb-19 02:10 AM 10/10 would buy 19-Feb-19 02:10 AM even if they had to evacuate the city block to bring in the source 19-Feb-19 02:43 AM XDDDDDDDDDDDDDDDDDD 19-Feb-19 09:20 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20190219_181612-FF96F.jpg 19-Feb-19 09:20 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20190219_181758-562A6.jpg 19-Feb-19 09:20 AM Finally, some parts. 19-Feb-19 09:20 AM I was wondering. Can't I just get rid of the barium oxide layer in the filament? (at a reduced performance, I guess) 19-Feb-19 10:07 AM https://media.discordapp.net/attachments/348573350966067200/546172479811485716/DHvZxm9.png 19-Feb-19 11:03 AM The tube seems to be sealed with some kind of epoxy. Or at least the outher metal ring. 19-Feb-19 11:37 AM it would be clean and chemfree for sure 19-Feb-19 01:02 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/JPEG_20190219_215442-FB54F.jpg 19-Feb-19 01:02 PM uff yeah that looks glued 19-Feb-19 01:02 PM I can send you a tube that is soldered 19-Feb-19 01:40 PM Thanks, I appreciate it. Is it one of those cheap ones you found? (Otherwise I can't afford it ) 19-Feb-19 02:08 PM Yes 19-Feb-19 02:08 PM It's for free 19-Feb-19 02:08 PM What is your address again? 19-Feb-19 03:37 PM @Nixie with a plain tungsten filament you need to run it hotter to get a given current, so shorter life. Also, I think plain filaments have thorium in them? Without that emission may be extra low. 19-Feb-19 03:37 PM I do not know whether a poisoned oxide cathode is worse than plain tungsten. 19-Feb-19 03:37 PM That is, whether there is any benefit to removing the coating. 19-Feb-19 03:48 PM Oh, also, if the imager is like most tubes, the cathode is indirectly heated. That is, not a coated filament, but rather a separate heated metal bit. 19-Feb-19 03:57 PM ahh for F sake my parents are going to kill me 19-Feb-19 03:57 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20190220_003645-B163D.jpg 19-Feb-19 03:57 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20190220_003659-67E76.jpg 19-Feb-19 03:58 PM that looks like fun >.> 19-Feb-19 03:58 PM it was 1600 °C max, but it has no heating elements right now 19-Feb-19 03:58 PM and for the other temp extreme I got a He compressor + adsorber 19-Feb-19 03:58 PM ooh! 19-Feb-19 03:59 PM and some small stuff, like a couple 2 G resistors 19-Feb-19 03:59 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20190220_010147-87219.jpg 19-Feb-19 03:59 PM uhh, that oven once had SiC heaters 19-Feb-19 04:07 PM hmm, interesting, I have not seen SiC heaters for some while, only MoSi2 19-Feb-19 04:07 PM I need to get an oven with mosi2 elements sometime soon 19-Feb-19 04:11 PM https://www.nabertherm.com/produkte/details/en/labor_hochtemperaturoefen 19-Feb-19 05:22 PM yeah, MoSi2 elements are suprisingly expensive tho 19-Feb-19 10:31 PM @robamacl thanks. I'll have to get some helium, I guess. Asfar as I can see in the tube, the filament is directly connected to two pins, doesn't seem tohave anything weird going on. 20-Feb-19 12:06 AM y helium? 20-Feb-19 12:22 AM To protect the filament, as it is lighter than air it will rise to the top of the tube if kept vertical. 20-Feb-19 12:22 AM y not argon (havier than air) 20-Feb-19 12:22 AM fill it like a cup 20-Feb-19 12:23 AM Yeah, in theory should work, but it's less saferish. Might be doable if I make the KF25 adapter and just close it up after Ar filling. 20-Feb-19 12:23 AM In any case, the tube I got seems to be resin bonded, so I might damage it while dismantling the front plate, so not gonna worry about helium at this point. 20-Feb-19 12:24 AM you coul fill up a large pan/bucket ... bath tub with argon to work safer 20-Feb-19 12:25 AM A bag might be better, but yes, the general idea of having it submerged in Argon. 20-Feb-19 12:25 AM even a trash bag should work 20-Feb-19 12:25 AM yeah 21-Feb-19 05:06 AM https://www.youtube.com/watch?v=OI_HFnNTfyU 21-Feb-19 05:06 AM So lovely vintage. 21-Feb-19 05:45 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20190221_141618-57CE1.jpg 21-Feb-19 05:45 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20190221_141636-74615.jpg 21-Feb-19 05:45 AM /me is happy 21-Feb-19 05:59 AM who is "/me" XDDDDD 21-Feb-19 05:59 AM Is that the neutron source? 21-Feb-19 11:24 AM yep ^.^ 22-Feb-19 12:59 AM oh sht 22-Feb-19 01:07 AM and now it's yours? 22-Feb-19 01:07 AM :> 22-Feb-19 01:07 AM it has a TUeV badge, right? 22-Feb-19 01:07 AM :3 22-Feb-19 01:07 AM it kinda looks like walking the dog 22-Feb-19 01:07 AM "meh, just walking my neutron source, and you?" 22-Feb-19 01:29 AM Sadly not mine, but I'm friends with the guy who runs the whole thing 22-Feb-19 01:29 AM not sure if I want something like that at home tbh... 22-Feb-19 01:29 AM ~15 µSv/h neutron dose on the surface, + ~20 µSv/h gamma dose 22-Feb-19 01:29 AM with the source outside of shielding you get 3 mSv/h gamma and "OVERFLOW mSv/h" neutrons 22-Feb-19 01:50 AM oh jeez 22-Feb-19 01:53 AM Funny thing is 22-Feb-19 01:53 AM due to us working in a shielded building and only short handling time of the sources we got <1 µSv in total during the 5 hours we were there 22-Feb-19 01:53 AM gamma only that is 22-Feb-19 01:53 AM my dosimeter jumped up to 1 µSv on the way back home 22-Feb-19 02:13 AM Bahahaahh. 22-Feb-19 02:13 AM Don't get outside! 22-Feb-19 01:05 PM https://i.ebayimg.com/images/g/AUwAAOSwpOVccBV2/s-l1600.jpg 22-Feb-19 01:05 PM valve 22-Feb-19 01:05 PM adorable 1.33" conflat gate valve 22-Feb-19 01:05 PM heh 22-Feb-19 01:05 PM I jsut got some 1/4 NPT stainless valves in yesterday 22-Feb-19 01:05 PM for the [bio]diesel flow bench 22-Feb-19 01:05 PM for measuring volumetric efficency 22-Feb-19 01:05 PM I thought I would be able to machine the barbs I needed, but apaprently we dont have any steel, or brass fo rhtat matter, that is 1/2", so unable to actually make anything to size.. god thing the hardware store has eveyrhting I need (1/4 NPT to 3/8 barb) 22-Feb-19 01:30 PM question... do [solenoid] valves require any sort of [oil] lubrication? depends how fast?if wear is critical or not (say, further down the path?)? 22-Feb-19 02:40 PM uhm, depends on the design I suppose? 22-Feb-19 02:40 PM man I need a lathe... 22-Feb-19 04:26 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/s-l1600-99A08.jpg 22-Feb-19 04:26 PM getting some more stuff and bits 22-Feb-19 04:26 PM this guy on eBay is emptying my wallet and I'm honestly ok with it 22-Feb-19 04:26 PM https://i.ebayimg.com/images/g/9W8AAOSwdX5ccBpq/s-l1600.jpg 22-Feb-19 04:37 PM Hehe. Im' gona pick up some hornets tomorrow :> 22-Feb-19 06:09 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/1550887747884603789182-03A54.jpg 23-Feb-19 10:57 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20190223_1901412-4D6C7.jpg 23-Feb-19 10:57 AM Vacuum chamber :D 23-Feb-19 10:57 AM (for a not super low pressure of course) 23-Feb-19 10:57 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20190223_1758542-A07A3.jpg 23-Feb-19 11:31 AM Brown! Not sure how the endplates are going to react to small vacuums, they look huge but thin (could be wrong, of course) 23-Feb-19 12:32 PM what thermometer is usually used for high temp ovens? 23-Feb-19 12:32 PM I have one that once went up to 1600°C and someone cut off the thermocouple 23-Feb-19 12:32 PM from what I found it could be B, N, R or S type 23-Feb-19 12:32 PM but I don't know whats the most common 23-Feb-19 12:56 PM that really depends, could also be something like tungsten rhenium 23-Feb-19 12:59 PM hmm 23-Feb-19 12:59 PM HMMMM 23-Feb-19 12:59 PM I think I should have some of that lying around 23-Feb-19 12:59 PM well, I have two sets of wires here, one labeled WRe5 and one labeled WRe20 23-Feb-19 02:43 PM K type probes reach 1350°C 23-Feb-19 02:55 PM which is why I think it was not in the original 1600°C system 24-Feb-19 12:09 PM https://pbs.twimg.com/media/D0MkD37WkAAV4SA.jpg:large 24-Feb-19 12:58 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/DSC_1629-935C2.jpg 24-Feb-19 12:58 PM You know @AdamMcCombs it would help if you reseated all the chips on the boards you were reseating chips on 24-Feb-19 01:17 PM Oh 24-Feb-19 01:17 PM What board is that? 24-Feb-19 01:17 PM Scan gen? 24-Feb-19 01:25 PM ROFL 24-Feb-19 01:26 PM Met the guy running this company a few years ago. Anyone familiar with it? https://www.mymochii.com 24-Feb-19 01:26 PM Oh yeah 24-Feb-19 01:56 PM WHAAAAAAT 24-Feb-19 01:56 PM what is the price on that? 24-Feb-19 01:56 PM how does it work? 24-Feb-19 01:56 PM whaaaaaaaat 24-Feb-19 02:26 PM found some pics of a pretty laser 24-Feb-19 02:26 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20181013_152420-6EEE4.jpg 24-Feb-19 02:26 PM just looking through some old pics 24-Feb-19 02:26 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20181021_112443-66748.jpg 24-Feb-19 02:26 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20181021_162037-AA5E6.jpg 24-Feb-19 02:26 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20181101_212516-79E06.jpg 24-Feb-19 02:37 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20190112_155853-EA211.jpg 24-Feb-19 02:54 PM @Nixie those are all things I will share when I am able to 24-Feb-19 03:12 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20170426_170609-C2625.jpg 24-Feb-19 03:23 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20170708_192641-EEB7E.jpg 24-Feb-19 03:23 PM find the mistake 24-Feb-19 03:23 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20171128_180116-0CD6B.jpg 24-Feb-19 03:40 PM switerland? 24-Feb-19 03:40 PM switerland 25-Feb-19 11:21 PM Is there any radar freq DIFFERENT than police/road ones with small emitter and receiver I could conceal in the rear of my motorbike? 25-Feb-19 11:21 PM (just to give a warning if anything from behind approaches at a higher than a set speed differential) 25-Feb-19 11:57 PM (and yes, too much free time to think, I know) 26-Feb-19 02:25 AM Just found this HB100 doppler detector 26-Feb-19 02:25 AM https://www.youtube.com/watch?v=r2NwtRPYWK4 26-Feb-19 11:22 AM Yeah HB100 should be license free in most places 26-Feb-19 11:22 AM some countries have police radar on same freq 26-Feb-19 11:22 AM ditto 24GHz, but the CDM324 "24GHz" modules can be anywhere in frequency and are not that stable. 26-Feb-19 11:22 AM But HB100 has a DRO osc so they are quite stable. Fun toys and easy ~10.525GHz emitter 26-Feb-19 12:45 PM Niiiice. 26-Feb-19 12:45 PM I wonder if it is possible to make it much directional. 26-Feb-19 05:05 PM It is smoewhat directional out of the box 26-Feb-19 05:05 PM As it uses a patch antenna array (ok just two) 26-Feb-19 05:05 PM 2x patch for transmit and 2x patch for receive 26-Feb-19 05:05 PM If more directional is needed, it's possible. But at the same time it might be cheaper to buy a 10GHz or 24GHz Gunnoscillator module with a mixer diode (aka door opener, solfan, gunnplexer) and using a suitably high gain horn on it, or adding a dish feed and using a dish antenna. 26-Feb-19 05:14 PM It has to be really small to fit inside my motorbike tail box, in any case. (I know little about radar antena geometry, sadly) 26-Feb-19 05:14 PM I would just like to discriminate between lanes, so it does only "scan" behind me. 26-Feb-19 05:14 PM Maybe that's more like LIDAR territory. 26-Feb-19 05:14 PM Might still try the HB100 for fun. 26-Feb-19 06:20 PM Adam be like that when looking for leaks 26-Feb-19 06:20 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/1551233961306619781330-FF7BB.jpg 26-Feb-19 11:42 PM Omg knipex is just too good 26-Feb-19 11:42 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20190226_234206-BFAF1.jpg 26-Feb-19 11:50 PM Seriously, praise for Knipex with that photo? 26-Feb-19 11:50 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/R2222735-01-8C8EC.png 26-Feb-19 11:50 PM Ah, much better. 26-Feb-19 11:50 PM (I have the smallest one of that, but can't find it right now) 26-Feb-19 11:58 PM Oh common I just got them 27-Feb-19 12:01 AM let's that one pass 27-Feb-19 12:02 AM I pretty much have a complete tool kit already, I'm just optimizing my portable kit now... 27-Feb-19 12:03 AM So I have pretty much decided that I'm going to see a lot of knipex and possibly some snapon in that kit... 27-Feb-19 12:04 AM snapon? never heard of that brand, is it metric or imperial? XDDDD 27-Feb-19 12:04 AM Kidding apart, yeah, knipex is nice. Wera also works well. 27-Feb-19 12:04 AM That's another one I'm looking at 27-Feb-19 12:07 AM I added this little one to my collection, just because it's super pretty: 27-Feb-19 12:07 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/ratchet-7A38B.png 27-Feb-19 12:07 AM (but it's not from any big name brand) 27-Feb-19 12:07 AM (it's abut 10cm long, uses 1/4 bits, I made an adapter for small 4mm hex screwdriver bits too) 27-Feb-19 12:08 AM I was looking at getting something like that as well 27-Feb-19 12:08 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/machining-2-2CB7C.png 27-Feb-19 12:08 AM https://www.amazon.com/ARES-70040-Screwdriver-72-Tooth-Gearhead/dp/B01BUJXQJ6 27-Feb-19 06:47 AM I am debating whether to spend $200 on those posh Knipex diagonal cutters with brazed tungsten carbide inserts 27-Feb-19 07:08 AM photo? 27-Feb-19 09:08 AM https://www.aliexpress.com/item/Titanium-dioxide-nickel-oxide-TiO2-NiO-core-shell-nanowire-array/32910119008.html Lol, what the hell 27-Feb-19 09:09 AM page not found. 27-Feb-19 09:09 AM now it is 27-Feb-19 09:13 AM ^^ 27-Feb-19 09:13 AM No Idea what it is for, but I think it's funny one can buy nanomaterials from aliexpress 27-Feb-19 09:15 AM Yeah, I found wafers too. 01-Mar-19 05:35 AM Okay, mental exercise for who may be fun: 01-Mar-19 05:35 AM https://vortexbladeless.com/technology-design/ 01-Mar-19 05:35 AM this smells utterly fishy. 01-Mar-19 05:35 AM the fact that in this paragraph: 01-Mar-19 05:35 AM Currently, Vortex generates electricity through an alternator system, made by coils and magnets, adapted to the vortex dynamics, without gears, shafts or any rotating parts. Our Vortex generator is currently considered a “small wind turbine”. 01-Mar-19 05:35 AM the "alternator system" redirects to the wikipedia page about alternators... 01-Mar-19 05:37 AM xD 01-Mar-19 05:37 AM well, the physics check out, I just don't see any Advantage to conventional wind turbines 01-Mar-19 05:37 AM efficiency is gonna be terrible and the thing will be very loud if it is supposed to output any energy 01-Mar-19 05:37 AM I'm not sure about that, but I think Vibration is way worse in terms of mechanical wear compared to Rotation 01-Mar-19 05:40 AM they claim it's 40% more efficient than normal wind turbines, and silent 01-Mar-19 05:40 AM XDDDDDDDDDDDDDDDD 01-Mar-19 05:40 AM that is nice for them 01-Mar-19 05:40 AM :D 01-Mar-19 05:40 AM (is that irony?) 01-Mar-19 05:41 AM yes, I believe there is no way to get this thing efficient and or quiet 01-Mar-19 05:41 AM (ah, okay, remember, I'm useless around irony (seriously)) 01-Mar-19 05:41 AM glad that I'm not insane. 01-Mar-19 05:41 AM XDDDDDDD 01-Mar-19 05:42 AM actually it was sarcasm, not irony 01-Mar-19 05:42 AM Ahh 01-Mar-19 05:43 AM deliberately turning laminar(ish) flow into vorteces and vibrating Things with it is literally thr oposite of how you make things quiet 01-Mar-19 05:43 AM In my head, the whole anular alternator just doesn't work because a: low frequency of oscillation at bigger sizes. b: for it to be 360º capable, the gap must be huge all around, thus making induction generation really bad. 01-Mar-19 05:43 AM Also, at the same height as a normal wind turbine (lets assume the height of the generator, not top blade tip) even if the oscillation where not to be fast, I guess the tip would move a few meters. 01-Mar-19 05:43 AM that is going to wack birds too. 01-Mar-19 05:43 AM (main selling point for them) 01-Mar-19 05:43 AM I accept it would kill less birds per generator, but since they claim they only have to be spaced 1.5 bodies height, you are going to have more per area, thus having more chances of a "wack-a-bird" party (especially if they make rows and rows of them). 01-Mar-19 05:43 AM Also, absolutely NO FIGURES given. 01-Mar-19 05:49 AM oh my god 01-Mar-19 05:49 AM just imagine, that think like a gian baseball bat swinging around 01-Mar-19 05:49 AM batting birds agains houses and what not 01-Mar-19 05:50 AM BAHAHAHA 01-Mar-19 05:50 AM Giving them the benefit of the doubt, I guess that they are not going to move that much (like not even +-15º ?) 01-Mar-19 05:50 AM I'd hope so 01-Mar-19 05:50 AM giant rods loudly humming out in the open that will definately break your bones if you touch them 01-Mar-19 05:51 AM XDDDD 01-Mar-19 05:52 AM sounds like an episode of black mirror 01-Mar-19 05:52 AM https://tenor.com/view/hitchhikers-guide-to-the-galaxy-dont-panic-zaphod-beeblebrox-sam-rockwell-stupid-gif-3555401 01-Mar-19 05:52 AM YES 01-Mar-19 05:52 AM this 01-Mar-19 05:52 AM :D 01-Mar-19 05:52 AM I know (han solo face) 01-Mar-19 05:53 AM I love how the lemon hat has a cutout just the right size for the swatters 01-Mar-19 05:53 AM Maybe they did it on purpose 01-Mar-19 05:53 AM :D 01-Mar-19 05:57 AM a maximum oscillation amplitude of 2,7º. 01-Mar-19 05:57 AM just found that 01-Mar-19 05:57 AM let's see how many meters does that translate to, if scaled to 30 meters 01-Mar-19 05:57 AM (tip movement) 01-Mar-19 05:59 AM 1.4 meters 01-Mar-19 05:59 AM so 2.8 meters peak peak 01-Mar-19 05:59 AM 3 01-Mar-19 05:59 AM that 01-Mar-19 05:59 AM XDD 01-Mar-19 06:00 AM enough to bat small air planes 01-Mar-19 06:00 AM anything on the frequency? 01-Mar-19 06:00 AM sincerely...I doubt that any shape of "alternator" can use that kind of deflection at the base/mid height 01-Mar-19 06:00 AM 5Hz for a 3m one 01-Mar-19 06:00 AM (2.75m actually) 01-Mar-19 06:00 AM but with that height, the frequency would be ridiculously slow 01-Mar-19 06:00 AM (apart that even using composites, that thing is going to flex like mad) 01-Mar-19 06:02 AM 10/10 perfect Idea would invest in 01-Mar-19 06:02 AM XDDDDDDDDD 01-Mar-19 06:02 AM (THAT was sarcasm) 01-Mar-19 06:02 AM (thanks) 01-Mar-19 06:02 AM XDDDDDDDDDDDDDD 01-Mar-19 06:03 AM :D 01-Mar-19 06:03 AM (that one I got, but because it was 1000% obvious) 01-Mar-19 06:03 AM (but don't count on it on future ones) 01-Mar-19 06:04 AM don't worry I wont expect too much of you :P 01-Mar-19 06:09 AM From their website: "Thanks to be very lightweight and to have the gravity center close to the ground, anchoring or foundation requirements have been reduced significantly compared to regular turbines, easing installation." 01-Mar-19 06:09 AM I thought foundation was more related to wind pressure on swept area. 01-Mar-19 06:09 AM Eh... 01-Mar-19 06:09 AM https://vortexbladeless.com/cost-effectiveness-analysis-bladeless/ 01-Mar-19 06:25 AM I guess if it oscillated around a point you could have rotation at the bottom 01-Mar-19 06:25 AM but that thing doesn't make any sense 02-Mar-19 02:01 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20190302_103712-91725.jpg 02-Mar-19 02:01 AM lol 02-Mar-19 02:01 AM Well that was a rush 02-Mar-19 02:01 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20190301_224227-5B66F.jpg 02-Mar-19 02:01 AM I had to get some sem x ray analysis done and I was running out LN2 in the detector... So I just had to keep running until... 02-Mar-19 02:01 AM Best part was this was the first time this detector had been chilled in in almost 2 years... Also I moved the scope from Chicago... So we definitely got lucky that it worked out first try. 02-Mar-19 02:01 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20190301_164938-285DB.jpg 02-Mar-19 02:08 AM "had to keep it running until..." https://youtu.be/qHd39w0L6Hs 02-Mar-19 02:09 AM Got some really surprising data out of the run as well 02-Mar-19 02:09 AM Also I think it's time to retire my box of 840 parts 02-Mar-19 02:09 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20190301_151520-2134B.jpg 02-Mar-19 02:49 AM Use duck tape! 02-Mar-19 02:49 AM XDDD 02-Mar-19 02:49 AM The power of the cuack. 02-Mar-19 02:49 AM I should have a significantly more overkill case soon... 02-Mar-19 02:50 AM Also, homework 02-Mar-19 02:50 AM looks intently 02-Mar-19 02:51 AM I made have made a slightly iresponsible decision relating to flight cases... 02-Mar-19 02:51 AM Pelican? 02-Mar-19 02:51 AM I was presented with the option to buy one peli case... 02-Mar-19 02:51 AM XDDD 02-Mar-19 02:52 AM Or 2 peli case for 1.7x the price of one... 02-Mar-19 02:52 AM So I did the logical thing 02-Mar-19 02:52 AM And got 2 peli cases 02-Mar-19 02:53 AM Nice! 02-Mar-19 02:53 AM homework 02-Mar-19 02:53 AM (sorry, my keyboard does that on his own) 02-Mar-19 02:54 AM some key got stuck 02-Mar-19 02:54 AM or smth 02-Mar-19 02:54 AM homework, Adam 02-Mar-19 02:54 AM Damn 02-Mar-19 02:54 AM I'll get around to it 02-Mar-19 02:55 AM might have to change keyboards 02-Mar-19 02:55 AM I'm finally home and it's like 3am 02-Mar-19 02:55 AM have a good sleep, then 02-Mar-19 02:55 AM Night 03-Mar-19 02:07 AM sooo 03-Mar-19 02:07 AM I just got a TMP 03-Mar-19 02:07 AM and it came with 4 (FOUR) meters of cable 03-Mar-19 02:07 AM don't you want to keep that as short as possible due to EMI etc? 03-Mar-19 02:51 AM would not be very well shielded? 03-Mar-19 02:52 AM dunno, did not take it apart 03-Mar-19 10:50 AM when was it released? xD 03-Mar-19 10:50 AM at least pfeiffer has their old cable shielded iirc 03-Mar-19 10:52 AM datecode says '88 für the TMP and '85 for the controller 03-Mar-19 10:58 AM Stock pfeiffer cables ware shielded, so are our clones. 03-Mar-19 10:58 AM Just the right lenghts and much cheaper. 03-Mar-19 11:14 AM I'm sure it's shielded 03-Mar-19 11:14 AM I'm just surprised by the length I guess 05-Mar-19 01:21 PM https://i.ebayimg.com/images/g/IeIAAOxy4t1Sk-16/s-l1600.jpg 05-Mar-19 01:21 PM https://www.ebay.com/itm/PFEIFFER-TURBO-VACUUM-PUMP-TPH-110-ITEM-1110-SXX/201586812044 05-Mar-19 01:21 PM ouchhhh 05-Mar-19 01:21 PM EQUIPMENT IN EXCELLENT COSMETIC CONDITION. 05-Mar-19 01:21 PM that hurts 05-Mar-19 01:21 PM LOLOLOL 05-Mar-19 01:21 PM I can't imagine how every blade was broken so cleanly off tho 05-Mar-19 01:21 PM its like wat 05-Mar-19 01:21 PM Wow there are a lot of shipping tabs in this! 05-Mar-19 01:21 PM XD 05-Mar-19 01:42 PM LMAOOOOOOOOOOO 05-Mar-19 11:40 PM :D 06-Mar-19 08:09 AM god damn it 06-Mar-19 08:09 AM I really want to build the tmp into my vacuum system, but I'm still waiting for the iso o-rings 06-Mar-19 08:09 AM I ordered them last sunday and they didn't arrive jet 06-Mar-19 08:09 AM the clamps I ordered on monday are here... 06-Mar-19 08:29 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20190306_172223-B79A2.jpg 06-Mar-19 08:29 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20190306_172250-ACA2B.jpg 06-Mar-19 08:29 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20190306_172325-37EB1.jpg 06-Mar-19 08:29 AM that's just a beautiful PCB 06-Mar-19 08:45 AM @GigaSquirrel I know those feels too much, waiting for pieces to do things... 06-Mar-19 08:46 AM that was like my whole plan for the day 06-Mar-19 08:46 AM figure out where it fits best, do cable management, pump it down, leaktest, maybe build a stand for the TMP, etc 06-Mar-19 08:46 AM but nooo 06-Mar-19 08:48 AM taps his shoulder and shows an empty wallet 06-Mar-19 08:48 AM You where saying about what? 06-Mar-19 08:48 AM Wait 06-Mar-19 08:48 AM That phrase is wrongly made 06-Mar-19 08:48 AM I meant it as "i feel you bro" 06-Mar-19 08:50 AM please don't hate me for this, but I see it like extremly slow vs no internet at all, I'm happier with no internet at all because the alternative is just frustrating 06-Mar-19 08:50 AM My bad, sorry. 06-Mar-19 08:50 AM huh, how is this your bad? 06-Mar-19 08:50 AM did you bribe my mailman to wait a day? 06-Mar-19 08:51 AM maybe? 06-Mar-19 08:51 AM 06-Mar-19 08:51 AM *evil stare at @Nixie * 06-Mar-19 08:51 AM Nothing beyoncé can't change 06-Mar-19 08:52 AM https://media1.tenor.com/images/9493adb476ab5dd7a01817e8141de14a/tenor.gif?itemid=5323315 06-Mar-19 08:52 AM put a ring on it... 06-Mar-19 08:52 AM I'd love to, if I had the rings! 06-Mar-19 08:53 AM keeps dancing 06-Mar-19 08:53 AM (forgive me, I've been all day in bed, so my head is just messed up) 06-Mar-19 08:54 AM no hard feelings 06-Mar-19 08:54 AM well, some hard feelings, but only against my mailman 06-Mar-19 08:55 AM Bahaha 08-Mar-19 02:31 AM Dumb question: 08-Mar-19 02:31 AM I flare the ends of the fiber optics in these, for retention and at the output end, after sanding, for diffusion f¡of light so the spot is bigger. I wonder however, the flaring at the input adds or subtracts light entering the fiber? (PMMA fiber) 08-Mar-19 02:31 AM https://twitter.com/nixie_guy/status/1103965030377246720 08-Mar-19 02:31 AM I know the angle of the "cone" is waaay past light rebound angle, for the whole cone, but I am not sure if even then, it might help geting a slight percent more light into it. 08-Mar-19 02:31 AM (not important in any way, just gathering light from a diffused led to get it to the outside of the helmet) 08-Mar-19 02:31 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/unknown-6D4F2.png 08-Mar-19 02:31 AM (also that tight bend can't be helpful too) 08-Mar-19 02:42 AM Also, beauty shot, because awesome: 08-Mar-19 02:42 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20190308_105253-9103C.jpg 08-Mar-19 03:43 AM @Nixie Have you entered that tho this contest? https://hackaday.com/2019/03/06/new-contest-flexible-pcbs/ 08-Mar-19 03:44 AM No, heard of it, but doesn't even have a project. and it's pretty lame. But thanks for sharing ^^ 08-Mar-19 03:50 AM I was mostly thinking "do I know anyone who has recently done stuff with flexible pcbs?" And recalled that project and harmon instruments. And that dude uses SMA and 2.92mm connectors in pcb test's that cost multiple times the price of the pcb's being tested. 08-Mar-19 03:50 AM But yeah pretty lame rewards in the contest. 08-Mar-19 04:00 AM Bahahahaha, I meant that MY project is lame! 08-Mar-19 04:12 AM Nah, it's well designed and well made. Imo possibly worth the time to enter in to the contest. 08-Mar-19 10:22 AM Btw, today I wrote to 3 of the last spanish scientific glassblowers, to see if they can introduce me to the last glassblower in my area. I highly doubt I can scratch a job from that, but at least I'll directly know a guy that does it. XD 08-Mar-19 10:22 AM (answers pending from all of them, one in linkedin, two on facebook) 08-Mar-19 10:22 AM There is only 17 left in whole spain, so, I have totally assumed they must know eachother to some extent. 08-Mar-19 11:19 AM Possibly yeah. 09-Mar-19 03:19 AM https://www.youtube.com/watch?v=gaCvplN9l7A Ouch. 09-Mar-19 03:24 AM this video physically hurts me 09-Mar-19 03:24 AM I'm gonna play it 24/7 while you're here 09-Mar-19 03:25 AM stabs his eyes 09-Mar-19 03:25 AM and his ears 09-Mar-19 06:09 AM collects the blood for offerings to the god of machining 09-Mar-19 12:31 PM I’m assuming that video is some turbopump abuse? 09-Mar-19 12:43 PM It doesn't sound like it's rubbing, but guess starting it in air, does put a huge stress in the driving coils past certain RPM's 09-Mar-19 03:06 PM most drivers will limit the input power, it is unlikely to burn them up when you run it at high gas pressures 09-Mar-19 03:10 PM nah, what you gotta do is go past your MV to 120v transformer at the pole and clamp the pump directly to the MV lines, give it the 13kv it really craves! 09-Mar-19 05:26 PM 10-Mar-19 08:45 AM @Noxz https://www.youtube.com/watch?v=84aWtseb2-4 10-Mar-19 08:45 AM https://www.youtube.com/watch?v=-5wpm-gesOY 11-Mar-19 03:34 AM @Conmega @Treehouseman just bought this: 11-Mar-19 03:34 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/s-l500-70A26.png 11-Mar-19 03:34 AM (I prefer to have paper on my hands for this, otherwise I get easily distracted if the pdf or whatever is in the screen, other than the IDE) 11-Mar-19 03:34 AM It says the following: 11-Mar-19 03:34 AM "This book assumes you have no previous knowledge, and does a great job explaining what each section of code does, so that you can really understand what the code does, instead of just copy/paste code." 11-Mar-19 03:34 AM should be simple enough for me to follow, I guess. 14-Mar-19 04:42 AM I will give you some Arduino advice 14-Mar-19 04:42 AM Burn down the Arduino IDE 14-Mar-19 04:42 AM Use platformIO 14-Mar-19 04:42 AM It’s beautiful 14-Mar-19 04:42 AM Atom in general is a wonderful piece of software 14-Mar-19 04:44 AM Noted! 14-Mar-19 04:44 AM Let's say I'll start with the arduino IDE, just to get the hang of it, then will change to platformIO 14-Mar-19 04:44 AM I got visual studio installed with it. 14-Mar-19 04:44 AM Will ask for help once I switch, and sorry, but you got all the numbers for me to bother you to no end on how to start. 14-Mar-19 04:51 AM Ok 14-Mar-19 04:55 AM prepares rope and stimulants to kidnap @a_quiet_scientist 15-Mar-19 01:27 AM LMAOOOOOOOO 15-Mar-19 01:27 AM https://www.youtube.com/watch?v=EVOBk-InL00 15-Mar-19 01:45 AM @a_quiet_scientist I tried using Atom once, but it was too bulky/slow compared to sublime-text... I think I was looking for a specific language-highlighting plugin which it either ended up not having, or was too cumbersome for me to learn how to install 15-Mar-19 01:45 AM the VScode side of platformIO looks a lot more capable on the debugger side of things, which is all I can see being the appeal of wanting to use platformIO anyway (am I missing something?) 15-Mar-19 01:45 AM I can only imagine though, that their debugger stuff either causes execution slowdown, or some non-deterministic timing effects (on the embedded platform)... since it doesn't appear to be using a hardware debugging feature like JTAG or SWD 15-Mar-19 01:45 AM oh, nevermind, CTRL-F and there is indeed mention of JTAG 16-Mar-19 12:14 PM @Nixie just watched that - and everyone in t he comments is right saying it is not a fusor, it's plasma 16-Mar-19 12:14 PM no D2.. well, there may have been some in the hydrogen gas he generated, but not really 16-Mar-19 12:14 PM and appears he did an alcohol + Al foil (+ HgCl2 to amalgamate?.. CuCl2 also works to pit and expose fresh Al) to generate H2(g) and ocllected in a balloon 16-Mar-19 12:14 PM I've made quite a bit of Al(OiPr)3 that way 16-Mar-19 12:14 PM really nice that you can vacuum distill that over.. still have a jar somewhere 16-Mar-19 12:14 PM by somewhere I mean my chemical cabinet (a kitchen pantry) downstairs 16-Mar-19 12:14 PM D2 can be collected from tap water (in the form of D2O/HOD(mono D)) - would need to rewatch that 10s clip of generating the gas to really understand what he used, but he left a lot out.. anywho, yeah 16-Mar-19 12:14 PM this is one of the better liquid sources I know of.. in the US, http://unitednuclear.com/index.php?main_page=product_info&cPath=16_17_69&products_id=135 16-Mar-19 12:14 PM I was looking into generating deuterium chloride at one point 16-Mar-19 12:14 PM and actually, I didnt come across it until after I looked into fusors which is what the kid that sold me the turbo pump was working on 16-Mar-19 12:14 PM but yeah, neat concept 16-Mar-19 12:14 PM "You can easily make pure Deuterium gas for Fusor experiments, etc. by running DC current through it and collecting the gas (electrolysis)." derrr... of course, no need for Al there 16-Mar-19 09:46 PM @Noxz technically this is indeed a fusor in the video. It is a very simple and crude demo one, but by the strictest definition it is an Inertial electrostatic confinement device of fusor topology. Now at that level it will do nothing more than make a confined plasma (still quite poorly due to the poor vacuum it is operated at), but it is a demo fusor nonetheless. Fusors do not need D2 to be classified as one - that's the primary difference between a demo fusor and a production level one. A fusor operating on air is still a fusor. I think the presenter should have been a lot more clear on the difference between his cheap demo one and an actual neutron producing system, as this one as is would definitely not be viable for neutron production at all with the current setup. Unfortunately there is a lot of public misunderstanding and misinformation about fusors and fusion in general. In terms of youtube comments, they are always exceptionally painful to read and horrifyingly ill informed on the subject. However it is also the presenters responsibility to thoroughly explain the concepts behind a device rather than add to unnecessary uninformed hype. 16-Mar-19 09:47 PM duly noted, thanks for clarifying 16-Mar-19 09:47 PM also, if i ever make YT videos, I will disable ocmments 16-Mar-19 09:47 PM (dog walk time, bbl) 16-Mar-19 09:47 PM (just ran some fuel experiments, so a bit tired, too) 16-Mar-19 09:48 PM Yeah, honestly I think if I ever put out videos I'd disable them as well, way too many trolls and misinformation to have useful conversations on it lol 16-Mar-19 10:10 PM I actually have a decent txt file on pros/cons of running a YT channel.. and the community is certainly one of them.. you hear dave jones from eevblog talk about it about, and how addictive it is to check comments every hour 16-Mar-19 10:29 PM pretty happy about the experiment I just ran good output, will verify it and spot check other settings if if they map 1:1 or not, tomorrow 17-Mar-19 12:50 AM @Noxz yeah, hence my "LMAOOOOOOO" on top of the post. 17-Mar-19 01:17 AM To be honest disabling comments to me is like a big kick in the head. On most smaller channels, where subscribers are focused and watching because they are actually genuinely interested in the subject. I generally see good discussion happen in the comments. And disabling them is closing doors instead of opening them. 17-Mar-19 01:17 AM I mean is it really that hard to ignore someones keyboard smashing? Not like they are yelling in your face. 17-Mar-19 01:17 AM Yea it can be annoying. But to me if I get frustrated by someone else being ignorant or rude. That's my fault for overreacting to something that litterally doesn't matter. But that's my opinion, have this grain of salt to go with it :) 17-Mar-19 03:56 AM Yeah, but many people are unable to mentally filter those. Any bad criticism weighs much more than any cheering (unit per unit) in their heads, so they can be demotivated quickly. 17-Mar-19 07:39 AM Eh, as far as I see it youtube comments isn't a great medium for in depth technical discussion. 17-Mar-19 07:39 AM I also don't have a youtube channel yet, and never post on the comments section myself anyway, so not a big issue to deal with fir now. I also don't have the proper setup to make more pro videos like a lot of the big time maker channels, so for now everyone will have to deal with real simple and dry not-great-quality videos that are occasionally posted on twitter lol 17-Mar-19 07:59 AM Also, people who know me by now also know I post half a novel when I respond usually - if I did that for youtube comments, that would be my full time job (assuming there is even enough viewers and comments to begin with lol). If I do make a channel, I will probably leave comments open initially in the beginning to gauge how it goes, but idk lol I don't have much experience in that area regarding youtube. 17-Mar-19 09:49 AM I actually have notes on the aspects of YT channels and why comments are good/bad and the aim.. I'll dig them up in a bit because I think it's a really good discussion 17-Mar-19 09:53 AM Yeah, I think it's a good thing to talk with others thinking about it as well. I'd be interested to hear how others feel on the subject. Haven't decided fully for myself yet, still split 17-Mar-19 10:22 AM I do have a YT channel, but since I post random stuff just to have it avaliable to insert it elsewhere, I don't actually get any comments in them. XDDD 17-Mar-19 10:22 AM @Applied_Ion We love your lenghty responses! 17-Mar-19 10:28 AM @Nixie thanks, though I do admittedly have a bit of a response length problem (my emails are generally absurdly long dealing with technical stuff, way more than necessary, though I like to include plenty of details.) Guess it kind of makes up for not being much of a talker in person lol. 17-Mar-19 10:34 AM If it's only for thechnical stuff, I don't see the problem. I mean, it gives less room for misunderstandings. 17-Mar-19 10:34 AM Someday we'll meet and I'll check about that "not being much of a talker" XDDDD 17-Mar-19 11:27 AM pulled up my notes on having a channel.. you fellas going to be in voice chat soon enough? easier to speak it all than basically copy-pasting my txt file 17-Mar-19 11:28 AM Not "soon" but around 9 (for me) 17-Mar-19 11:28 AM (yeah, it's like 1.5hours, not that much) 17-Mar-19 11:29 AM that's pretty soon 17-Mar-19 11:29 AM XDDD 17-Mar-19 11:29 AM Then yes. 17-Mar-19 12:33 PM Sorry, won't be on today, I'll be out for most of the day 17-Mar-19 12:37 PM Lol, I do the exact opposite of @Applied_Ion I am so used to playing games or using platforms with super short length limits so I type a BUNCH of messages. 17-Mar-19 06:54 PM snacking between experiments is so time consuming 17-Mar-19 11:33 PM Bahahaah 17-Mar-19 11:33 PM I am a bit i between those, only interrupted by the different places that send a message with ENTER and those that don't and I send the messages by error, halfway written. 17-Mar-19 11:33 PM Yeah, bit you gotta power the body, right? 18-Mar-19 01:15 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/unknown-FDFEC.png 20-Mar-19 09:26 AM http://pages.cs.wisc.edu/~kovar/hall.html Just in case anyone here didn't know about this gem 20-Mar-19 10:12 AM LMAOOOO 20-Mar-19 01:43 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/no-15F79.jpg 20-Mar-19 01:43 PM @a_quiet_scientist Just saw your thread in the fusor forum 20-Mar-19 01:43 PM do you know if richard hull has ever worked with a russian B10 tube? 20-Mar-19 01:43 PM to my knowledge he hasn't 20-Mar-19 01:43 PM and ffs, why are so many people from the US calling me "Lucas" 20-Mar-19 01:43 PM If we were talking I'd understand, but they've only ever read my name 20-Mar-19 01:43 PM effing hell 20-Mar-19 01:43 PM stubborn old men 20-Mar-19 01:52 PM Heh thanks. If you’re going to have a “real name only” policy you must surely get people’s name right 20-Mar-19 01:52 PM Is it possible to break the Russian tube, say from overvoltage? 20-Mar-19 01:54 PM too high of a current will degrade the cathode, maximum is 25 µA continuous for the snm-11 20-Mar-19 01:54 PM but I've had milliamps for seconds through them without any noticeable degradation 20-Mar-19 01:54 PM might actually be interesting to test what kind of abuse they can take 20-Mar-19 02:14 PM I hope I didn't derail your thread with my reply... 20-Mar-19 02:35 PM BTW, where did you get that drilled moderator? 20-Mar-19 02:36 PM I made the moderator 20-Mar-19 02:36 PM 90mm HDPE bar stock 20-Mar-19 02:37 PM how the hell did you make a 20 cm deep hole in there 20-Mar-19 02:37 PM teach me, master! 20-Mar-19 02:38 PM 17.5cm deep hole which is still a really long drill bit 20-Mar-19 02:38 PM 20mm dia 20-Mar-19 02:38 PM In the lathe from both ends 20-Mar-19 02:39 PM ah, ok 20-Mar-19 02:39 PM I am not a lathe master by any measure 20-Mar-19 02:39 PM well, the moderator would be bigger than my lathe 20-Mar-19 02:40 PM I dont think i turned on my lathe today.. 20-Mar-19 02:40 PM The three jaw chuck ate my thumbnail yesterday..... 20-Mar-19 02:40 PM are you getting withdrawal symptoms yet? 20-Mar-19 02:40 PM ouch 20-Mar-19 02:41 PM Few days left until end of quarter.. So finishing up a project 20-Mar-19 02:41 PM Just painted it RAL6011 20-Mar-19 02:41 PM Or was it RAL6009... 20-Mar-19 02:41 PM I have both.. Whicjever is raseda green 20-Mar-19 02:41 PM Anywjo.. Back to it. 20-Mar-19 02:42 PM good luck, have fun 20-Mar-19 04:27 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/DSC_0155-1E924.jpg 21-Mar-19 07:49 AM https://www.youtube.com/watch?v=AdciAZH79ik&t=0s Live in 10 min! 21-Mar-19 09:52 AM Finally I realized someone will be able to tell me what this is! 21-Mar-19 09:52 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/nwOtx-2000x1200-232EF.png 21-Mar-19 09:52 AM I sort of remember those being some kind of semiconductor detectors...but not sure. 21-Mar-19 10:44 AM http://cds.cern.ch/record/1998635 21-Mar-19 04:24 PM is the fusor forum down for anyone else here? 21-Mar-19 05:58 PM Yeah, been down the whole day 22-Mar-19 01:03 AM still are :( 22-Mar-19 01:09 AM @GigaSquirrel not much info on the detectors in there. 22-Mar-19 01:13 AM http://cms.web.cern.ch/news/silicon-pixels 22-Mar-19 01:13 AM http://aliceinfo.cern.ch/Public/Objects/Chapter2/DetectorComponents/silicon_pixel_detector.htm 22-Mar-19 01:18 AM OOOOHHHHHHHHHH 22-Mar-19 01:18 AM thanks! 22-Mar-19 01:29 AM But those are not PIN devices, right? 22-Mar-19 01:30 AM No I think they are 22-Mar-19 01:30 AM they are SDDs, which I think are PIN devices 22-Mar-19 01:30 AM https://edms.cern.ch/ui/file/398932/1/ITS_TDR.pdf Page 7 and following describe the ITS 22-Mar-19 01:30 AM ah, no, the SDDs are behind the pixels 22-Mar-19 01:38 AM Yeah, as I see in the schematics, they do not seem to be PIN devices. They are not even isolated (so to speak) between themselves. Silicon is very thin, tough (300um) 22-Mar-19 01:38 AM @a_quiet_scientist do you think silicon that thin is obtainable? (by amateurs, etc, etc) 22-Mar-19 01:39 AM @Applied_Ion do you know anything about those pixels? 22-Mar-19 01:40 AM correction, they are isolated, but just by P/N junctions. 22-Mar-19 01:40 AM nothing extremely fancy like deep trenches, as I was afraid. 22-Mar-19 01:40 AM Would this work as you wanted? 22-Mar-19 01:40 AM or does the PIN device have different characteristics? 22-Mar-19 01:41 AM I don't know xD 22-Mar-19 01:41 AM well, go know 22-Mar-19 01:41 AM I have no real Idea about semiconductor detectors 22-Mar-19 01:42 AM And I have no idea about semiconductors, so we're even 22-Mar-19 01:43 AM Yeah! 22-Mar-19 01:44 AM As far as I see, if we could get our hands into very thin silicon, we could definitely try something like that, (probably 1D for ease of contact) 22-Mar-19 01:44 AM IF those work for you and you can make the electronics for it. 22-Mar-19 01:47 AM don't buy anything for it (yet), it (still) is only a thought experiment 22-Mar-19 01:49 AM HA 22-Mar-19 01:49 AM HAHA 22-Mar-19 01:49 AM HAHAHAHAHAHAAHAHAHAHAH 22-Mar-19 01:49 AM with what money? 22-Mar-19 01:49 AM 22-Mar-19 01:49 AM I don't know, maybe you started working in the mines close to you and found like 12 tonnes of gold 22-Mar-19 01:50 AM XD 22-Mar-19 01:50 AM ah, but you would not sell it for money and instead just use it so sputtercoat everything in your house 22-Mar-19 01:50 AM a single giant gold nugget 22-Mar-19 01:50 AM with 12 tonnes of gold, you can probably sputter coat everything...literally 22-Mar-19 01:50 AM OMFG 22-Mar-19 01:50 AM look what I found 22-Mar-19 01:50 AM https://www.amazon.co.uk/s?k=alpha+nanotech+inc.&ajr=0&ref=nb_sb_noss 22-Mar-19 01:50 AM that is affordable 22-Mar-19 01:50 AM https://www.amazon.co.uk/Alpha-Nanotech-Inc-Silicon-Inches/dp/B07MBC9BZC/ref=sr_1_7?ajr=0&keywords=alpha+nanotech+inc.&qid=1553244441&s=gateway&sr=8-7 22-Mar-19 01:50 AM OOOOMMMMMMMMMMMMFFFFFFFFFFFFFGGGGGGGGGGGGGGGGGGGGGG 22-Mar-19 01:50 AM https://www.amazon.co.uk/Silicon-Wafer-Prime-Grade-Diced-Membrane/dp/B07L2WW1DB/ref=sr_1_8?ajr=0&keywords=alpha+nanotech+inc.&qid=1553244441&s=gateway&sr=8-8 22-Mar-19 01:52 AM nice 22-Mar-19 01:53 AM https://www.amazon.co.uk/Alpha-Nanotech-Prime-Grade-Silicon-Inches/dp/B07MBCWHGV/ref=sr_1_4?ajr=0&keywords=alpha+nanotech+inc.&qid=1553244441&s=gateway&sr=8-4 22-Mar-19 01:53 AM I want EVERYTHING 22-Mar-19 01:54 AM looks like you're going to have to sell your gold 22-Mar-19 01:54 AM XDDDD 22-Mar-19 01:54 AM looks like it 22-Mar-19 01:54 AM anyone wants 12tons of gold? 22-Mar-19 01:54 AM doesn't come with a sputter coatter, tho. 22-Mar-19 01:54 AM @Conmega ! keep an eye on those, they have amazon shop (amazon US and amazon EU ) 22-Mar-19 01:54 AM Damn I want the 25 diced ones. 22-Mar-19 01:56 AM sell 2 tonnes and build a sputter coater that can take the remaining 10 22-Mar-19 01:56 AM XDDDDD 22-Mar-19 01:56 AM 44€ for 25 square pieces 22-Mar-19 01:56 AM not bad. 22-Mar-19 01:56 AM daaaaaaamn I need a job. 22-Mar-19 02:01 AM yep! 22-Mar-19 02:04 AM well. 22-Mar-19 02:04 AM (btw, those are only P doped, whereas those pixel sensors are N doped) 22-Mar-19 05:19 AM https://www.youtube.com/watch?v=fT6mzqBAqmo 22-Mar-19 06:27 AM @GigaSquirrel sorry don't know much about these detectors 22-Mar-19 06:28 AM too bad 22-Mar-19 11:45 AM Woohoo, the fusor forum is finally back! 22-Mar-19 01:48 PM what happened? 22-Mar-19 01:48 PM any explanations? 22-Mar-19 01:48 PM >>Post by Frank Sanns » Fri Mar 22, 2019 8:38 pm The site was offline due to high volumes being driven here by search engines. It was due to extensive promoting of a member of the forum and it cost Paul $$$$ and forced the rest of the members to be offline for a day and a half. 22-Mar-19 01:48 PM apparently they're hosting the site on an absolute minimum server 22-Mar-19 01:48 PM and the recent spike in traffic after all the young fusioneers was enough to overload it 22-Mar-19 01:48 PM >>This unabated pressure on our site has been going on for around a month now with spikes coming the past few days. It has forced us to make some changes with the site with more coming. The changes that you will see immediately are: 1. Not all categories are visible without being signed in. 2. Search functions and other parsing functions are not accessible without being signed it 3. Ages are being taken out of fusioneer records 4. Bots will now skip over portions of the site as well as some threads and some categories/words. 5. Member lists are no longer visible unless signed in 22-Mar-19 01:51 PM yayyyyyyyyy.... 22-Mar-19 01:51 PM XDDDDDDDDDDDDDDDD 22-Mar-19 01:51 PM The grumpy old men are back! 22-Mar-19 01:51 PM this is why I never joined that forum anyway, I don't want to seem like another ignorant guy poking around 22-Mar-19 01:51 PM I already do enough of that here :P 22-Mar-19 01:52 PM Excuse me? I am the Sir Ignorant here. 22-Mar-19 01:52 PM XDDDDDDDDD 22-Mar-19 01:52 PM But yea the young fusors have always rubbed me the wrong way, I have seen a few who are getting fame, but they seem interested, then there was that recent one, they were so monotone and like they were falling asleep during the interview 22-Mar-19 01:52 PM its like 22-Mar-19 01:52 PM WAT 22-Mar-19 01:52 PM Really? 22-Mar-19 01:53 PM kid probably wants to play drums or something but the parents are like, DO THIS YOU'LL BE A GENIOUS 22-Mar-19 01:53 PM I hate parents pushing things upon their children 22-Mar-19 01:53 PM passion is the most important thing, not knowledge, not smarts, not maths 22-Mar-19 01:53 PM just pure passion for what you want to do 22-Mar-19 01:53 PM Yeah 22-Mar-19 01:53 PM you get so much more learning done period 22-Mar-19 01:53 PM But yea the young fusors have always rubbed me the wrong way snrk 22-Mar-19 01:53 PM Don't start that 22-Mar-19 01:53 PM snrkkkkkk 22-Mar-19 01:53 PM XDDDDDDDDD 22-Mar-19 01:54 PM You know what I mean, the people who are getting the fame for being 14 years old and fusing 22-Mar-19 01:54 PM I had a job at a billion dollar corporation at 19 I'm sure I pissed enough people off myself lol 22-Mar-19 01:54 PM I do, it just had to be done 22-Mar-19 01:54 PM https://tenor.com/view/dbz-dragonball-fusion-gif-4929472 22-Mar-19 01:54 PM wat XD 22-Mar-19 01:55 PM (gotrunks, fusing) 22-Mar-19 01:55 PM uhgggggg 22-Mar-19 01:55 PM so bad 22-Mar-19 01:56 PM But anyways, I get your point, and share it. 22-Mar-19 01:56 PM Reminds me of a certain individual that doesn't appear to want to talk much to us both. 22-Mar-19 01:57 PM O.o? 22-Mar-19 01:57 PM but that's another story 22-Mar-19 01:58 PM pretty sure I know who your talking about, and I've talked to Adam about that, and well its not they they don't want to talk to me, I just haven't reached out, and also I explained to you I think its just your Spanish culture oozing too much :P 22-Mar-19 01:58 PM yayyyy cultural barriers 22-Mar-19 01:58 PM XDDDDDDDDDDDDDDD 22-Mar-19 01:58 PM maybe. 22-Mar-19 01:58 PM its really frustrating, but oh well ,we live and we learn 22-Mar-19 01:58 PM with time comes understanding :) 22-Mar-19 01:58 PM but I had no problems fitting in here. 22-Mar-19 01:59 PM your jokes get some groans out of voice chat sometimes 22-Mar-19 01:59 PM you know that as well as we do lol 22-Mar-19 01:59 PM XDDDD, yeah, okay, but if I get the respectful mode on (that is, I don't know the person, so I don't make jokes) 22-Mar-19 01:59 PM there should be no problem connecting 22-Mar-19 01:59 PM your also like a kid in the candy shop sometimes I think is another thing 22-Mar-19 01:59 PM I mean, the common interest is exceptionally particular. 22-Mar-19 02:00 PM OH OH OH OH HIGH VACUUMMMMM 22-Mar-19 02:00 PM ;P 22-Mar-19 02:00 PM says the man who lives in candyland. 22-Mar-19 02:00 PM XDDDDDDD 22-Mar-19 02:00 PM But Okay, I'll keep quieter. ^^ 22-Mar-19 02:00 PM yes but when people are having conversations vocally it can get a little annoying, its easy to read over text but speaking over voice is hard ;) 22-Mar-19 02:00 PM just take your turn, its all we can do 22-Mar-19 02:00 PM that or invent telepathy without somehow driving the world into destruction 22-Mar-19 02:00 PM :) 22-Mar-19 02:01 PM XD 22-Mar-19 02:02 PM non apocalyptic scenarios are overrated 22-Mar-19 02:03 PM I think our current biggest concern is you and your radioactive sources 22-Mar-19 02:03 PM I think what I meant, is that I never got into any kind of interaction, where I could become annoying. For example, I pretty much was amazed by Gigasquirrel, but only spoke with him via small comments on his posts and such, slowly building confidence. He replied back, and that led to interaction. 22-Mar-19 02:03 PM I'll take that as a compliment 22-Mar-19 02:03 PM (on twitter) 22-Mar-19 02:03 PM well, that has lead to you having 200+ memes sent at once. 22-Mar-19 02:04 PM more than once 22-Mar-19 02:04 PM yup 22-Mar-19 02:05 PM quick ot question 22-Mar-19 02:05 PM https://www.eraser.com/products/wire-cable-strippers/thermal-wire-strippers/ 22-Mar-19 02:05 PM I thought you should never heat PTFE above 400°C or it will release HF? 22-Mar-19 02:09 PM lol I have no idea 22-Mar-19 02:09 PM but that is a funny consideration 22-Mar-19 02:09 PM have to wonder if people making products realize what horrible things they could be doing 22-Mar-19 02:11 PM maybe that's their plan 22-Mar-19 02:11 PM or I did not understand the working principle of those strippers 22-Mar-19 02:12 PM oh thats 1400F 22-Mar-19 02:12 PM so yea 760C 22-Mar-19 02:12 PM hrm 22-Mar-19 02:12 PM I mean it is variable 22-Mar-19 02:12 PM there may be a section in the manual saying DON'T HEAT PTFE ABOVE 400 22-Mar-19 02:14 PM Pyrolysis of PTFE is detectable at 200 °C (392 °F), and it evolves several fluorocarbon gases and a sublimate. An animal study conducted in 1955 concluded that it is unlikely that these products would be generated in amounts significant to health at temperatures below 250 °C (482 °F).[33] While PTFE is stable and nontoxic at lower temperatures, it begins to deteriorate after the temperature of cookware reaches about 260 °C (500 °F), and decomposes above 350 °C (662 °F).[57] The degradation by-products can be lethal to birds,[58] and can cause flu-like symptoms[59] in humans—see polymer fume fever. 22-Mar-19 02:14 PM When PTFE is heated above 450 °C the pyrolysis products are different and inhalation may cause acute lung injury. 22-Mar-19 02:15 PM oh fun 22-Mar-19 02:15 PM it would be fun to email that company with that exact line 22-Mar-19 02:15 PM like uh, what do you have to say about that? 22-Mar-19 02:15 PM XD 22-Mar-19 02:17 PM I'd love to do that, but they want everything for the contact form 22-Mar-19 02:17 PM ah, but they've got an info@ mail adress 22-Mar-19 02:17 PM hehe 22-Mar-19 02:17 PM do it 22-Mar-19 02:17 PM and do a twitter thread on it 22-Mar-19 02:17 PM because lol why not 22-Mar-19 02:23 PM >>Hello! I just came across your thermal wire strippers and saw that they're recommended for PTFE insulated wire. According to your site the strippers go up to ~600°C, which is kind of confusing to me; I've always been told never to heat PTFE above ~400°C, otherwhise it will release toxic gases [https://en.wikipedia.org/wiki/Polymer_fume_fever]. How do you thermally strip PTFE wire and still keep it safe? 22-Mar-19 02:23 PM heh go for it 22-Mar-19 02:24 PM aaaand it's done 22-Mar-19 02:30 PM maybe the cutters can just soften the PTFE with less temperature 22-Mar-19 02:30 PM so it's easy to peel 22-Mar-19 02:32 PM we'll see 22-Mar-19 11:11 PM "forecast suggests the aurora borealis is likely to appear as far south as New York, Chicago and Seattle" 23-Mar-19 03:32 AM How I am supposed to interpret the possibility that objective reality doesn't exist at a quantum level? 23-Mar-19 03:35 AM You do, and don't, at the same time. 23-Mar-19 03:35 AM XDDDDD 23-Mar-19 03:40 AM Maybe it means I can experience a reality without brexit... 23-Mar-19 03:41 AM XDDDD 23-Mar-19 03:41 AM are you in UK? 23-Mar-19 03:44 AM Yes, sadly. 23-Mar-19 10:14 AM @GigaSquirrel I have some PTFE wire.. though I will mechanically strip hem, then use something like coloured plastic rings to ID ea wire.. since I am sure sharpie markers wont work well 23-Mar-19 10:14 AM the plan was to use entirely white ptfe wire for the engine, make it look nice 23-Mar-19 10:14 AM and also, engines are dirty/messy/oily 23-Mar-19 10:14 AM so best resistance 23-Mar-19 10:15 AM using ptfe wire is never a bad Idea 23-Mar-19 10:15 AM it's just expensive an annoying to work with 23-Mar-19 10:16 AM this will be my first time actually working with it 23-Mar-19 10:16 AM always wanted to before 23-Mar-19 10:16 AM also, all wires will be amphenol or whatever car ocnenctor sealed 23-Mar-19 10:16 AM but yeah, IDing the wires was a tricky thought to figure out 23-Mar-19 10:16 AM I plan on using those little plastic rings of the same color designation the original car wares were, so I can easily trace back to the service manual 23-Mar-19 10:16 AM the only wire I bougth thus far is for the injectors 23-Mar-19 10:16 AM so 600V rated.. I forget which AWG, maybe 18? 23-Mar-19 10:16 AM a spool of 100ft or so 23-Mar-19 10:16 AM for 4 injectors 23-Mar-19 10:16 AM (2 wires ea) 23-Mar-19 10:16 AM 14 AWG.. http://www.alphawire.com/en/Products/Wire/Hook-Up-Wire/Premium/5859.aspx 23-Mar-19 10:16 AM oh, spent some time last night looking more into the magnetic tape/strip for scales of a DRO (like the sony magnescale).. half looked into the quadrouplex stuff and so forth 23-Mar-19 10:16 AM some of my calculations for linear audio tapes, even hifi, was reporting about 3 micron resolution.. which can be cut down a bit more if you do two signals in a quadrature setup 23-Mar-19 10:16 AM (left and right audio) 23-Mar-19 10:16 AM was tryign tot hink if helical scanning could be done or not.. sketches out a few things.. but moveable (spinning) parts iwll eventually fail, and also machines choomping through metal will cause a bit of vibrations and whatnot 23-Mar-19 10:16 AM anywho, put some thought into it.. 23-Mar-19 10:16 AM time for a coffee, then to work on the house 23-Mar-19 02:02 PM Helical scan... plenty of challenges in there... 23-Mar-19 02:59 PM yeah, that's why the linear (audio) is much easier, but the resolution just isnt quite there 23-Mar-19 02:59 PM I'd like at least 1um 23-Mar-19 03:27 PM maybe using two stereo heads, giving a double/whatever quadrature could achieve a decent resolution.. the point of the whole thing is that it's actually super easy/cheap to make and test.. that test may be easier done with a known glass DRO scale to compare.. but just the idea that recording a certain frequency, maybe with a HiFi deck, could achieve a decent enough response is nice.. I have yet to actually explore frequency modulation aspects of it as well 23-Mar-19 03:27 PM time to work on the house more 24-Mar-19 12:31 AM moin 24-Mar-19 02:31 AM Gloin! 24-Mar-19 02:57 AM PTFE wire is nice but expensive and not flexible 24-Mar-19 03:01 AM Not flexible as in RC silicon wire flexible, or as in rigid core copper wire? 24-Mar-19 05:10 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20190324_125532-830BA.jpg 24-Mar-19 05:10 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20190324_125856-547A4.jpg 24-Mar-19 05:10 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20190324_125907-8B5B8.jpg 24-Mar-19 05:10 AM anyone here know how to identify this APD? 24-Mar-19 07:46 AM hmm, looks like this one 24-Mar-19 07:46 AM https://www.first-sensor.com/cms/upload/datasheets/AD500-9-400M_TO5_5000073.pdf 24-Mar-19 11:03 AM It's super pretty (not that it's relevant, but whatever). 24-Mar-19 11:03 AM yes, very 24-Mar-19 11:03 AM What are you going to use it for? 24-Mar-19 11:04 AM I love the decoupling caps inside the package 24-Mar-19 11:04 AM maybe for a small neutron scintillator I've got here 24-Mar-19 11:04 AM not sure yet 24-Mar-19 11:09 AM Are those hand soldered? 24-Mar-19 11:12 AM I really don't know 24-Mar-19 11:12 AM but I don't see any other way 24-Mar-19 11:12 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20190324_191441-FB42C.jpg 24-Mar-19 11:12 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20190324_191356-83674.jpg 24-Mar-19 11:20 AM did they solder the legs for ESD protection? (I have only seen laser diodes with aluminium foil) 24-Mar-19 11:22 AM solder the legs? 24-Mar-19 11:22 AM you mean the blob shorting them all? 24-Mar-19 11:22 AM I did that 24-Mar-19 11:42 AM Ah 24-Mar-19 11:42 AM Okay 25-Mar-19 01:31 AM @Nixie sooo, how is it? 25-Mar-19 02:41 AM moin 25-Mar-19 09:22 AM Morning! 25-Mar-19 09:22 AM Excellent! 25-Mar-19 09:22 AM The bad: I fell from the motorbike while stopped (front wheel was in a ditch, and the sidestand didnt deploy properly, and I fell to the other side. I sligtly messed up my knee, but I'll live. Bike is fine, only minor markings in the handlebar counterweight and exhaust (and that is extremely minor) 25-Mar-19 09:22 AM The meh: They don't have any machinery. The best they have is an industrial MIG, but that's it, no CNC, nor plasma, etc...Doesn't really matter, as pay and timetable is 10/10 for me. 25-Mar-19 09:22 AM The good: They really need someone with electrical/electronic knowledge. 25-Mar-19 09:22 AM They don't do much complexity, but there is room for improvement. Might end designing some microcontroller-LESS control PCB for their led light signaling. 25-Mar-19 09:29 AM Cool! Its always nice to get into a position where you have to apply yourself and push your skills and learn more :) 25-Mar-19 09:30 AM Yeah, the PCB they are using now as an ATMEGA16, but it's a pure combinatory output with a selector. 25-Mar-19 09:30 AM Overkill board and overpriced. 25-Mar-19 09:30 AM I could do a simple configurable board (with soldered contacts, as this has to endure lots of vibration) with diode logic or something. 25-Mar-19 09:32 AM anything not for consumers is generally "overpriced" 25-Mar-19 09:32 AM Ah, it'll be awesome if you can simplify the design and save them money, I'm sure they will really like you then :P 25-Mar-19 09:33 AM Yeah, totally 25-Mar-19 09:33 AM Just don't optomize yourself out of a job 25-Mar-19 09:33 AM BAHAHAHA, true! 25-Mar-19 09:33 AM but I guess I can make me more useful than anything. 25-Mar-19 09:34 AM you don't want to be on the receiving end of "Don't make me replace you with a small shell script" 25-Mar-19 09:34 AM Definitely nope. 25-Mar-19 09:34 AM Their selector is a big multistrand cable to a rotary selector, wich is METERS long. 25-Mar-19 09:34 AM I want to change that into a three wire cable, where the control line is voltage. (the selector just switches onto different resistors) 25-Mar-19 09:34 AM and it is decoded with some comparators at the other end. 25-Mar-19 09:38 AM nah, what you gotta do is a rotary flex shaft cable drive to put the switch contacts on the mainboard 25-Mar-19 09:38 AM then you only have one "wire" :D 25-Mar-19 09:38 AM depending on the design it actually isn't too absurd, I recall seeing this kind of setup before for something 25-Mar-19 09:41 AM Yeah, it is not absurd, but given that this might require montage in different lenght trucks, a wire that can be spliced/elongated is easier. 25-Mar-19 09:41 AM Also, they will require control over a new machine they are developing 25-Mar-19 09:41 AM (altough I have not totally understood the problem they have. 25-Mar-19 09:41 AM And then, general maintenance, (trucks have rearview cameras and so on) 25-Mar-19 09:43 AM Speed sensors! 25-Mar-19 09:43 AM That's what they're used with 25-Mar-19 09:43 AM old mechanical speedometer pickups, you could totaly work with that 25-Mar-19 10:13 AM you can't do resistance/etc because as stuff wears out resistance changes and different cable lengths give different resistances... digital is definitely better considering digital interfacing is way more lax... its hard to screw up basic on or off signaling with a good voltage range 25-Mar-19 11:48 AM (not resistance only, but voltage divisors) 25-Mar-19 11:48 AM If the cable is thick, it should not add too much resistance to the whole thing, and since it is like 8 positions and I can have 12V, steps of 1V should be big enough to be very resilient to wear. 25-Mar-19 01:39 PM Damn, Vidicon tubes ave gotten expensive. 25-Mar-19 01:39 PM nothing under 20$ (10$ tube 10$ shipping) 25-Mar-19 01:39 PM Anyone got sources for LI-441 tubes? 25-Mar-19 03:18 PM Why voltage detection? Not current detection? 26-Mar-19 09:33 AM Because it's easier to just add voltage dividers and chech with comparators than generating limited amounts of current, and detecting them. 29-Mar-19 01:07 PM soo 29-Mar-19 01:07 PM dumb question 29-Mar-19 01:07 PM but 29-Mar-19 01:07 PM with proportional detectors 29-Mar-19 01:07 PM why the hell don't manufacturers put something like average charge per event or at least gas gain in the datasheet 29-Mar-19 04:52 PM what's a better acronym for High Voltage in here, since HV seems default for High Vacuum? 29-Mar-19 07:14 PM High tension is used a lot in EMs for that very reason 30-Mar-19 01:18 AM ah, makes perfect sense 31-Mar-19 11:09 AM Has anyone here got one of those neutron irradiated dimes? 31-Mar-19 11:09 AM https://i.ebayimg.com/images/g/l~gAAOSwfGxcoDwP/s-l1600.jpg 31-Mar-19 11:09 AM most of the Ag-108m should still be in there 31-Mar-19 11:09 AM would be interesting to see a gamma spectrum of it 31-Mar-19 11:15 AM Do they have specs on what they should read, or what exactly they subjected them to? 31-Mar-19 11:15 AM Like, should it actually have changed notably or did they just give it a wiff of neutrons 31-Mar-19 11:16 AM afaik no, but most nuclides created have half lives of less then one hour 31-Mar-19 11:16 AM Boo 31-Mar-19 11:16 AM so some beta activity for a couple of mins 31-Mar-19 11:16 AM but! 31-Mar-19 11:16 AM Ag-108m has a t1/2 of 400y 31-Mar-19 11:17 AM I mean, it's not surprising, they can't just let the general public buy anything notably radioactive 31-Mar-19 11:17 AM only traces of it should be created and I was wondering if one could actually sniff them out 31-Mar-19 11:17 AM at least not easily 31-Mar-19 11:17 AM I mean it was the 60s 31-Mar-19 11:17 AM Even then 31-Mar-19 11:17 AM That was pretty much when they stopped radium 31-Mar-19 11:17 AM Which was about the best you could get 31-Mar-19 11:18 AM https://www.orau.org/ptp/collection/medalsmementoes/dimes.htm 31-Mar-19 11:18 AM Though if you want beta now, just get some tritium lol 31-Mar-19 11:18 AM Unfortunately you'll have a hell of a time getting it where you need it 31-Mar-19 11:19 AM why not Sr/Y90 for beta 31-Mar-19 11:19 AM at least that's not a gas 31-Mar-19 11:19 AM and it's got some oomph to it, unlike tritium 31-Mar-19 11:20 AM yeah, but is it readily available? 31-Mar-19 11:20 AM Aye 31-Mar-19 11:20 AM I can buy tritium sights all day long 31-Mar-19 11:20 AM I can buy old geiger counters with check sources all day long 31-Mar-19 11:20 AM or just go to georgia and take a RTG xD 31-Mar-19 11:23 AM Don't tempt me... 31-Mar-19 11:24 AM take me with you! 31-Mar-19 11:30 AM ugh, now you got me looking at the fesablilty of alpha/betavoltaics again 31-Mar-19 11:30 AM I really want to build a battery using that 31-Mar-19 11:30 AM The only problem is the output levels, well aside from the stuff needed to actually build the batteries lol 31-Mar-19 11:32 AM I'd go with conventional RTG design, not the most efficient, but easy and reliable 31-Mar-19 11:33 AM But then you have to source the isotopes that generate heat and then /enough/ of them to actually generate measurable heat 31-Mar-19 11:33 AM beat/alpha basically scale at whatever you want 31-Mar-19 11:33 AM and you could even be as lazy as tritium lights and solar panels 31-Mar-19 11:33 AM but betavoltaic panels are out there and would be more fun 31-Mar-19 11:37 AM but the Tritium Lights aren't open 31-Mar-19 11:37 AM none of the electrons actually make it to the outside 31-Mar-19 11:37 AM and the light output of those sights is terrible 31-Mar-19 11:44 AM That'd be the challenge, you can either use tritium lights and normal amorphous solar cells like lasersaber and nurdrage, or you can try to contain the tritium gas directly in contact to the betavoltaic panels for better output 31-Mar-19 11:44 AM 1 GBq Tritium gives you ~2 to 3 mW electrons at best, resulting in 1 mW or less of light output 31-Mar-19 11:45 AM there'd be challenge/risk involved with breaking open the lights to extract the gas but theoretically possible 31-Mar-19 11:45 AM that combined with the efficiency of solar panels ruins everything 31-Mar-19 11:45 AM do yourself a favour and never open those lights 31-Mar-19 11:45 AM But they look so tasty :D 31-Mar-19 11:45 AM And all the different flavors 31-Mar-19 11:46 AM this one tastes of crunch Cancer! 31-Mar-19 11:46 AM It's not like I'm already headed there with the xray machine lol 31-Mar-19 11:47 AM but you can't inhale x-ray sources 31-Mar-19 11:47 AM that's the actual problem 31-Mar-19 11:47 AM tritium itself is not dangerous at all, unless you inhale it 31-Mar-19 11:47 AM kinda like alpha 01-Apr-19 10:52 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20190401_194933-2C10A.jpg 01-Apr-19 10:52 AM No going back now. 01-Apr-19 12:12 PM So, how does this Dead Gauges Society work? Do you join it by aquiring dead gauges or by killing gauges? 01-Apr-19 12:12 PM Asking for a friend. 01-Apr-19 12:13 PM i think it was about the hornets, but... well, a dead gauge is a dead gauge... 01-Apr-19 12:13 PM no it's about owning a hornet 01-Apr-19 12:14 PM Well I do also have 2x IGP-400 hornets, just no time to determine their state of being. 01-Apr-19 12:14 PM hence the color 01-Apr-19 12:14 PM Heh. 01-Apr-19 12:14 PM they're schroedinger's gauges! 01-Apr-19 12:14 PM I have them in the R&D lab at work, in a cabinet only few meters away from the vacuum test setup. 01-Apr-19 12:14 PM I just want fancier electronics than a random 24V wallwart + cheapo multimeter ducktaped to the table 01-Apr-19 12:15 PM do they meow from time to time? 01-Apr-19 12:15 PM Ok random Phoenix Contact 20A DIN-rail PSU, but who's counting. 01-Apr-19 02:10 PM @Nixie aren't there enough Arduino guides online? 01-Apr-19 02:35 PM I prefer a physical book, so I dont get distracted in he computer. 01-Apr-19 02:35 PM I'm weird, I know. 01-Apr-19 02:38 PM That's very understandable. 02-Apr-19 10:55 AM https://twitter.com/GigaBecquerel/status/1113137836365148162 02-Apr-19 11:03 AM Larger than ISO 100 and smaller than ISO 160? ;) 02-Apr-19 11:03 AM Thing I hate about ISO is the ISO ### corresponds to like litterally no measurement on the thing 02-Apr-19 11:03 AM its stupid and frustrating for trying to figure out what you have 02-Apr-19 11:03 AM At-least as far I could tell, I measured ID/OD/Centering ring/etc/etc 02-Apr-19 11:03 AM https://www.lesker.com/newweb/flanges/flanges_technicalnotes_iso_1.cfm 02-Apr-19 11:04 AM but the inner hole ring fits iso-100 F 02-Apr-19 11:05 AM For example: Size Lip O.D. Lip I.D. Thickness in.(mm) ISO 100 4.016 (102) 3.89 (98.8) 0.154 (3.9) 02-Apr-19 11:05 AM lip OD is 102mm for ISO 100 02-Apr-19 11:05 AM like mfjdskafas 02-Apr-19 11:05 AM who made this garbage up? 02-Apr-19 11:06 AM yeah, so the average between ID and OD is 100ish 02-Apr-19 11:06 AM but yea I guess its ISO 100 you just need one of those plastic centering rings 02-Apr-19 11:06 AM because I can see where there was that indent on the metal 02-Apr-19 11:06 AM for one of those weird red plastic centering rings? 02-Apr-19 11:07 AM background on the left of the pic 02-Apr-19 11:21 AM ah yea ok :) 02-Apr-19 11:21 AM those centering rings are really weird 02-Apr-19 11:21 AM dunno why they use those vs the standard ones 02-Apr-19 11:21 AM might be a part of the "clamping support" or something like that 02-Apr-19 11:21 AM like you crush the oring until you rest up against that plastic then torque it to spec? 02-Apr-19 11:21 AM and its more supportive? 02-Apr-19 11:23 AM hm, that may be 02-Apr-19 06:30 PM EXPLODES INTO VIEW hello 02-Apr-19 06:31 PM (explosion was an unexpectedly effective zpinch) 02-Apr-19 06:31 PM Among countless other things, I missed this -- https://twitter.com/ConnorKrukosky/status/1113251849895862272 -- are there details on this hidin' someplace? o.o 02-Apr-19 06:31 PM cutely snowplows deuterons to ignition :3 02-Apr-19 06:32 PM @niklas made that 02-Apr-19 06:43 PM Dorp sorry my ignorance there 02-Apr-19 06:43 PM I was searching and searching back in the history of the channel for mentions 02-Apr-19 06:44 PM He is on Twitter as well 02-Apr-19 06:44 PM Check out Niklas Fauth (@FauthNiklas): https://twitter.com/FauthNiklas?s=09 02-Apr-19 06:46 PM I know I follow them... Again. I was looking around for posts on it I just couldn't find anything 02-Apr-19 06:46 PM thus the random mention in general not poking anyone in particular 02-Apr-19 06:47 PM I didn't know if qualia did 02-Apr-19 06:49 PM oh yeah we're mutuals :o 02-Apr-19 06:49 PM i'll poke 'em then! 02-Apr-19 07:04 PM I was planing on making my own 02-Apr-19 07:04 PM "Why would I buy a controller for a 23eur gauge?" 02-Apr-19 07:04 PM Well, still am, as it's likely the fastest way for me to get one. 02-Apr-19 07:06 PM it seems like it'd be a neat thing 02-Apr-19 07:06 PM especially as a way to procrastinate building any kind of actual datalogger >.> 02-Apr-19 07:06 PM i can only fit so much on a slow-scan dual-trace 'scope 02-Apr-19 07:07 PM Ya, I should just lashup an arduino with a resistor divider to it and call it a day 02-Apr-19 07:07 PM can even stuff the measurements out via serial and then bug a coworker about the best ways to visualize that in python. Which is likely gona be "matplotlib" or "lol TK" 02-Apr-19 07:09 PM since i am a sysadmin by trade, i was thinking i was gonna set up an instance of grafana + influxdb and shovel time-series datapoints over the network to a monitor with realtime graphs 02-Apr-19 07:09 PM that's the idea, anyways 02-Apr-19 07:09 PM People might laugh about TK, but I can (proudly?) say that all the testers at work are now using TK based GUI's, as the only machine with LabView got repurposed. 02-Apr-19 07:10 PM TK's not pretty but it's definitely an It Does The Job It's Supposed To kind of thing 02-Apr-19 07:10 PM Except that one legacy hidden engineering menu that is only accessible via SSH and has a gui made by ncurses 02-Apr-19 07:10 PM Yea 02-Apr-19 07:11 PM i love ncurses UIs, haha 02-Apr-19 07:11 PM They patched away the ASCII art cow 02-Apr-19 07:11 PM It was animated if the turbo pump was running. 02-Apr-19 07:11 PM aw! 02-Apr-19 07:11 PM i have to fill everything i make with tiny easter eggs or it's not truly complete 02-Apr-19 07:12 PM Usefull tool literally not documented or mentioned anywhere in the docs. 02-Apr-19 07:12 PM It seems to be an early engineering tool used in the first prototypes and then left in. 02-Apr-19 07:12 PM Anyway grafana should make for some pretty graphs 02-Apr-19 07:12 PM I on & off dream about ESP32 based wireless data aquisition bits. Would be neat and less dealing with wires and powering 02-Apr-19 07:18 PM i thought about it for a while too but then i realized running sensitive wireless transceivers around pulsed power capacitor banks might not be the soundest design decision 02-Apr-19 07:18 PM I think my ideal would be something with PoE. I'm pretty sure this exists in at least a couple forms, and passive PoE add-drop doodads are totally a thing too 02-Apr-19 07:19 PM Yep 02-Apr-19 07:19 PM But the cheap passive poe stuff is literally just stuffing power over unused ethernet pairs in 10/100BaseTX 02-Apr-19 07:19 PM I'd be afraid of induced currents in that 02-Apr-19 07:19 PM Because if the pulsed power disrupts 2.4GHz wifi, it's gona cause problems for other stuff too. 02-Apr-19 07:28 PM Speaking of passive PoE, this homebrew dmr hotspot (amateur radio thing) is fed with passive PoE, because my Mikrotik switch has that at one port and I save time and sanity by running a single wire to it. 02-Apr-19 09:04 PM Not quite as as simple but a lot of instrument manufactures go with can bus. Works nicely when you have to float a large part of the system and can just throw a fiber node on it. 02-Apr-19 09:31 PM CANbus supports some fiber phy layer thing out of the box? 02-Apr-19 09:31 PM Ware I building something that needed fiber due to it floating at, say 20kV, I'd likely rig up something with old 1Gb GBIC modules and if I can't source more connectors (all of mine are desoldered from old switches) I'd do the same with cheapest possible SFP modules. And then just push serial data over them. GBIC's dont care about the format, you just wiggle a pin and it wiggles at the other end. 02-Apr-19 09:32 PM I don't know how out of the box it is 02-Apr-19 09:32 PM But I know FEI scopes really love using it 02-Apr-19 09:33 PM Ok, I mostly just hear about RS-485 and "M12" connectors getting used at industrial settings. But I'm not exactly working in that space. 02-Apr-19 09:33 PM And in anycase it's likely slightly different in every country and at most there might be broaders terms like "in northern europe it's sometimes like this" "In usa they like these" 03-Apr-19 05:12 AM I have access to like an unlimited number of fiber transeivers because test floor at work and just buckets of old 4gb/8gb FC stuff ending up in the trash every minute 03-Apr-19 07:49 AM Oh, sweet! 03-Apr-19 07:49 AM I found a company close to me that makes silver mica caps 03-Apr-19 07:49 AM asked them if they have "leftovers" they'd sell for cheap 03-Apr-19 07:49 AM just got an e-mail along the lines of "No, but we'll send you some stuff for free" 03-Apr-19 07:58 AM LOL 03-Apr-19 07:58 AM nice 03-Apr-19 08:01 AM Time to build some proper charge amps I guess 03-Apr-19 08:01 AM Yes! 03-Apr-19 08:01 AM Gotta look for a decent OPV 03-Apr-19 08:01 AM 1+ GHz GBP and very low input bias current 03-Apr-19 08:01 AM <10 nA should be fine 03-Apr-19 08:01 AM any recommendations? :D 03-Apr-19 08:53 AM hm, the OPA 657 looks good 03-Apr-19 08:53 AM http://www.ti.com/lit/ds/symlink/opa657.pdf 03-Apr-19 08:53 AM 1.6 GHz and a couple of pA input current 03-Apr-19 08:53 AM and only 10 bucks a pop 03-Apr-19 09:01 AM also also 03-Apr-19 09:01 AM yay, got some 0.5mm lead wire in the mail 03-Apr-19 09:01 AM time to gasket all the things 03-Apr-19 09:01 AM oh wow that's soft 03-Apr-19 10:12 AM heh yea 03-Apr-19 10:12 AM lead is pretty soft 03-Apr-19 10:12 AM so is lead a good alternative to gold in your fancy crush stuff? 03-Apr-19 10:12 AM I hope so 03-Apr-19 10:13 AM I never heard of the gold crush stuff before even, I dunno how you seal the ends when you make a loop with it? 03-Apr-19 10:13 AM cheap enough to give it a try 03-Apr-19 10:51 AM <0xDBFB7#9254> https://www.youtube.com/watch?v=50AxjMV8-b0 03-Apr-19 10:51 AM <0xDBFB7#9254> y'all are surely way past this point but Ben demonstrated using solder and indium as crushable gaskets 03-Apr-19 10:52 AM oh... I can get indium from work dirty and used but... 03-Apr-19 10:52 AM <0xDBFB7#9254> I tried replicating with O-temper pure aluminum it did not work. 03-Apr-19 10:53 AM we use indium sheets for thermal interface material between CPUs and cold plates lol 03-Apr-19 10:53 AM <0xDBFB7#9254> oh cool! 03-Apr-19 10:53 AM but they are only like... 1.5" by 1.5" or so 03-Apr-19 10:53 AM <0xDBFB7#9254> making an air-tight loop does seem to be pretty tricky 03-Apr-19 11:06 AM Actually @Conmega, indium wire seals are often used in cryogenic high vacuum applications 03-Apr-19 11:06 AM You can't use them for baked systems due to the super low melting point, but they are in fact used for certain wire seal applications 03-Apr-19 11:06 AM There are standard methods of making a proper splice for indium and general wire seals 03-Apr-19 11:28 AM rightt I remember that now 04-Apr-19 03:33 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20190404_104707-EAD16.jpg 04-Apr-19 03:33 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20190404_112440-D89A9.jpg 04-Apr-19 03:33 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20190404_112912-972AD.jpg 04-Apr-19 03:33 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20190404_113255-71C0B.jpg 04-Apr-19 03:33 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20190404_112419-9083A.jpg 04-Apr-19 03:33 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20190404_113132-057AA.jpg 04-Apr-19 03:33 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20190404_104726-301BC.jpg 04-Apr-19 03:33 AM the stuff they've got here... 04-Apr-19 06:13 AM I was stumbled across a method of making femto lasers with opto-acoustic modulators.. and how the out of phase signal due to reflections and such makes an opening of very small for light to pass through, giving you the small time duration 04-Apr-19 06:43 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20190404_130249-A812F.jpg 04-Apr-19 07:15 AM uhh 04-Apr-19 07:15 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20190404_161222-316D8.jpg 04-Apr-19 07:15 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20190404_161436-830EF.jpg 04-Apr-19 07:15 AM yoink 04-Apr-19 09:28 AM That crotch protection... 04-Apr-19 09:35 AM 200v power supply? 04-Apr-19 09:35 AM Also, I broke a pivot on a small escape wheel.. Luckily we had a complete parts movement 04-Apr-19 09:35 AM Getting started on Automatic winding movements 04-Apr-19 09:35 AM Oh, also, there may be a German exchange student.. Which means one of us may go to Germany.. Likely the younger guy 04-Apr-19 09:35 AM For a month or quarter 04-Apr-19 09:40 AM @Nixie crouch down with a tight suit and you'll know why that is there xD 04-Apr-19 09:40 AM @Noxz Aye, 200V 150 mA 04-Apr-19 09:42 AM Don't know what University he goes to in Germany.. How many watchmaking programs exist there? 04-Apr-19 09:43 AM I don't know of any, but that's not my area of expertese 04-Apr-19 09:43 AM do you know the city? 04-Apr-19 09:45 AM Not yet, will ask... May be a few days for a response 04-Apr-19 09:46 AM yeah, that's how slow the Internet here is 04-Apr-19 12:17 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20190404_210744-3EE6C.jpg 04-Apr-19 12:17 PM ah it already feels at home 04-Apr-19 12:41 PM nice 04-Apr-19 12:41 PM no radiation coming off of it? :P 04-Apr-19 12:41 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20190404_161222-2D523.jpg 04-Apr-19 12:41 PM That was the only limit 04-Apr-19 12:42 PM I mean that means nothing to me 04-Apr-19 12:42 PM take whatever you want but measure it first 04-Apr-19 12:42 PM ahhh 04-Apr-19 12:42 PM ok 04-Apr-19 12:42 PM kewlio 04-Apr-19 12:42 PM and leave it if it is above 0.1 Bq/g 04-Apr-19 12:42 PM luckily that was below the detection threshold 04-Apr-19 12:42 PM and it being a power supply it is pretty heavy 04-Apr-19 12:42 PM so no worries there 04-Apr-19 12:42 PM but now that I've got green light there's no stopping me 04-Apr-19 12:45 PM I better see a fully kitted functioning lab sooner than later :P 04-Apr-19 12:47 PM a lot of glove boxes and two fume hoods are there 04-Apr-19 12:47 PM but there's no way I'm getting those out 04-Apr-19 12:47 PM the glove boxes give off some real dose rate 04-Apr-19 12:51 PM heh 04-Apr-19 01:18 PM In oposition to the imaginary doses ofother things. 04-Apr-19 01:18 PM yeah, I can only imagine the doses some other things in there gave off 04-Apr-19 01:23 PM Do NOT lick the science! 04-Apr-19 01:25 PM that's why I have to wear a mask 04-Apr-19 01:25 PM not due to dust or anything 04-Apr-19 01:25 PM but only so I don't lick it 04-Apr-19 01:29 PM lol 05-Apr-19 12:32 AM f'ing hell 05-Apr-19 12:32 AM I just came to work and by boss greeted me with "H! Hope you don't have a problem with us going to chernobyl" 05-Apr-19 12:34 AM oh man 05-Apr-19 12:34 AM I had a friend who did training there 05-Apr-19 12:34 AM I was watching a video on YouTube of someone exploring around there, then heard his voice and saw him in the background digging out a bit of core with a giger counter 05-Apr-19 12:34 AM He hadn't told me he had been there yet 05-Apr-19 12:34 AM I was not surprised though 05-Apr-19 12:36 AM hahaha 05-Apr-19 12:36 AM nice 05-Apr-19 12:47 AM omg thats awesome 05-Apr-19 01:40 PM Woah! 05-Apr-19 01:40 PM I'm sorry for you. You won't be able to bring anything "physical" back. 05-Apr-19 01:40 PM XDDD 05-Apr-19 01:41 PM I know :< 05-Apr-19 01:42 PM And rubbing your shoes hard outside the cleaned zone is probably forbidden. 05-Apr-19 01:44 PM what do you mean I can't take fuel fragments in the plane 05-Apr-19 02:53 PM I think you know what I think I mean. 05-Apr-19 07:03 PM this is a good video regarding having a YT channel.. https://www.youtube.com/watch?v=GKyKjgOF2cw 05-Apr-19 07:03 PM 2 days old 05-Apr-19 07:03 PM more so history, but yeah 06-Apr-19 06:07 PM <0xDBFB7#9254> hey, should I be worried about running a turbo with only ~15kg of clamping force? 06-Apr-19 06:07 PM <0xDBFB7#9254> some 1/4-20 bolts into thin aluminum plate 06-Apr-19 06:08 PM Sheer strength on that should be pretty damn high 06-Apr-19 06:08 PM The system on that tweet was on a piece of rubber not made for a tmp 06-Apr-19 06:09 PM <0xDBFB7#9254> this was... distinctly also not made for a tmp 06-Apr-19 06:09 PM <0xDBFB7#9254> maybe I should strap it down 06-Apr-19 06:09 PM <0xDBFB7#9254> anyway sorry to barge in 06-Apr-19 06:10 PM No problem at all 06-Apr-19 06:10 PM Also depends on the size of your turbo 06-Apr-19 06:10 PM There should be a spec on the force during a rotor burst in the data sheet 06-Apr-19 06:10 PM <0xDBFB7#9254> iso 100 06-Apr-19 06:10 PM <0xDBFB7#9254> haha yeah 06-Apr-19 06:11 PM It's rotor mass that matters 06-Apr-19 06:11 PM <0xDBFB7#9254> ah, that makes sense 07-Apr-19 02:12 AM why are there no high speed low input current opamps in dip 8 07-Apr-19 02:12 AM what good is pA input current range if you can't float one leg on a PTFE insulator 07-Apr-19 02:26 AM https://www.amptek.com/pdf/a225.pdf Want! 07-Apr-19 04:20 AM fancyyy 07-Apr-19 06:21 AM whoop whoop my He3 prop tube works 07-Apr-19 09:17 AM nice 07-Apr-19 12:55 PM https://twitter.com/JUNIUS_64/status/1114919079784210433?s=19 07-Apr-19 02:36 PM Lol 07-Apr-19 02:36 PM Those Amptek amps are $$$ 07-Apr-19 02:44 PM $450 for the A225 07-Apr-19 02:44 PM but... damn 08-Apr-19 02:44 AM moin 08-Apr-19 09:30 AM are those better than 08-Apr-19 09:30 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/image0-55D82.jpg 08-Apr-19 09:30 AM those? 08-Apr-19 09:30 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/image0-0003C.jpg 08-Apr-19 12:04 PM oohhh filaments 08-Apr-19 12:04 PM They actually look somewhat similar to the ISI ones I need heh 08-Apr-19 12:04 PM @AdamMcCombs will tell you exactly what they are for I bet though 09-Apr-19 07:24 AM @Conmega yeah, they are for the ISI 09-Apr-19 07:24 AM but the one above looks more sophisticated 09-Apr-19 07:24 AM and i wonder if that means more than fancy optics 09-Apr-19 07:24 AM They just look like the later gen 09-Apr-19 07:24 AM Are the bottom ones 3 pin? 09-Apr-19 07:24 AM the above are "more modern"? 09-Apr-19 07:24 AM the bottom ones i've in two versions 09-Apr-19 07:24 AM (have multiple packages) 09-Apr-19 07:24 AM one version is with 2 pin, the other version is 3 pin 09-Apr-19 07:26 AM 3 pin is usually the older stuff 09-Apr-19 07:26 AM ok 09-Apr-19 07:26 AM But there are exceptions 09-Apr-19 07:26 AM the from the package i imaged are 2-pin 09-Apr-19 07:26 AM just wondered if the version above (looks more complex to manufacture) has any advantage 09-Apr-19 07:26 AM like i dunno lesser stress on the filament 09-Apr-19 07:29 AM I think it's that and source size or something 09-Apr-19 07:29 AM so higher life time? but i don't know, just guessing 09-Apr-19 07:29 AM ah hmm 09-Apr-19 07:31 AM My filaments are 2 pin... I'd have thought 3 pin was newer stuff. 09-Apr-19 07:32 AM hmmm 09-Apr-19 07:32 AM so many options 09-Apr-19 07:32 AM No you don't really see 3 pin anymore 09-Apr-19 07:32 AM Pft be glad you have them... Remember a box of 10 are like 500 bucks new 09-Apr-19 07:32 AM Ah I see. 09-Apr-19 07:33 AM 500 Oo 09-Apr-19 07:33 AM Yea... 09-Apr-19 07:33 AM Filaments are expensive... 09-Apr-19 07:33 AM .o(more like the scope incl the filaments) 09-Apr-19 07:33 AM Yeah no don't oversaturate your filament 09-Apr-19 07:33 AM more than 09-Apr-19 07:34 AM My machine only came with 5 left in the box and one in the machine. Id like to get another 4 filaments blown or not so I can get mine rebuilt when I'm through them all 09-Apr-19 07:34 AM How many do you have just those 11 pictured or? 09-Apr-19 07:35 AM i have to check 09-Apr-19 07:35 AM more then the 11 yes, but i don't know exactly 09-Apr-19 07:35 AM have to scan the boxes 09-Apr-19 07:35 AM Wow... Nice... 09-Apr-19 07:44 AM app 40 09-Apr-19 07:44 AM 40 pieces not boxes 09-Apr-19 07:45 AM Yeah no go ahead and over saturate 09-Apr-19 07:45 AM some boxes are full of blown ones 09-Apr-19 07:45 AM eheh 09-Apr-19 07:55 AM @Conmega i could give you some if that helps? 09-Apr-19 08:00 AM Oh yea I could use some blown ones. It's like if you have a box of ten you can get them rebuilt for like 450 bucks vs 500 so it's not a massive savings but it's still worth doing. I'd love to have a total of 11 or so filaments so I can have one in the machine when I send out for the 10 to be rebuilt 09-Apr-19 08:00 AM And I just checked and I actually only have 4 in my box. One in the machine. So I'd need another 6 blown ones I guess. 09-Apr-19 08:00 AM I'd pay you a little bit for them, whatever shipping rounded up some I suppose. But it's up to you. 09-Apr-19 08:00 AM If you have that many anyway lol 09-Apr-19 08:00 AM It'll be awhile until I go through 4 filaments haha 09-Apr-19 08:02 AM ok, i could send you a pack with 6 blown and 4 fresh ones 09-Apr-19 08:02 AM Uh... You don't have to do that... If your going to give up good ones I'll pay you for them atleast some reasonable amount... 09-Apr-19 08:02 AM ok! 09-Apr-19 08:02 AM But personally you should probably hold on to them. 09-Apr-19 08:02 AM only 6 blown ones? 09-Apr-19 08:03 AM Yes please. I'd appreciate that 09-Apr-19 08:03 AM ok! 09-Apr-19 08:04 AM But yea if you plan to run your SEM with any regularity and keep it running for the next... 20 years... Then you'll really want to keep those filaments around heh... 09-Apr-19 08:04 AM i don't think that mankind has 20 years left 09-Apr-19 08:04 AM Pft lol 09-Apr-19 08:04 AM just kiddin 09-Apr-19 08:04 AM 10 max and all is over 09-Apr-19 08:05 AM Probably not if we could get ahold of some of the hardware we wish we could afford 09-Apr-19 08:05 AM lol yea 09-Apr-19 08:05 AM @Treehouseman found a 20Kw deep infrared laser at surplus the other day... 09-Apr-19 08:05 AM For welding and cutting... 09-Apr-19 08:05 AM that's BTW is a real good question 09-Apr-19 08:06 AM In a ds130 with good vacuum you should get 4-500 hours filament life 09-Apr-19 08:06 AM I hope to test those numbers especially once I bake out and fire up the ion pump. 09-Apr-19 08:06 AM If you never vent a hot filament 09-Apr-19 08:07 AM i mean: y are there so few "vicious scientists with engineering skills" out there? 09-Apr-19 08:07 AM But I probably want to replace a lot of orings before running that ion pump forever for maintaining vacuum without the duff. 09-Apr-19 08:07 AM Nah just get the leak rate down 09-Apr-19 08:07 AM If leak rate is good you are good to go 09-Apr-19 08:08 AM I need to get that gauge working then I can figure that out :) 09-Apr-19 08:08 AM ok, maybe it implies mankind is not that bad 09-Apr-19 08:08 AM No it just implies most of them are stupid... 09-Apr-19 08:08 AM Lmao 09-Apr-19 08:08 AM Why not both? 09-Apr-19 08:09 AM And or broke... 09-Apr-19 08:09 AM In which case all of the above right? 09-Apr-19 08:09 AM \o/ 09-Apr-19 08:09 AM D= 09-Apr-19 08:10 AM But yea really appreciate the extra blown filaments. It's something I didn't think I'd get my hands on because who sells blown filaments online haha. I was just expected to end up having to buy a set of 10 new to get to the point of having 10 used lol 09-Apr-19 08:11 AM Here, this will be enjoyed here too https://www.dropbox.com/sh/pdoko8ezqoyyqet/AACvptpiDOuoFSKroR7K14DHa?dl=0 09-Apr-19 09:01 AM fck me, I may get one or two more hpge detectors 09-Apr-19 09:01 AM I really need a good ln2 supply 09-Apr-19 09:24 AM Get a helium compressor and cryo head :) 09-Apr-19 09:32 AM that's the plan! 09-Apr-19 09:33 AM Wish you were over on this side of the planet, I do have two helium compressors at the moment lol 09-Apr-19 09:33 AM I totally may not be ending up with a 3rd because its single phase and I can use it NOW instead of like when I get 3 phase somehow 09-Apr-19 11:49 AM finally back home 09-Apr-19 11:54 AM \o/ 09-Apr-19 11:59 AM ugh only 2100 here 09-Apr-19 11:59 AM feels like 0300 09-Apr-19 11:59 AM if I go to sleep now my rythm is ruined 09-Apr-19 11:59 AM if I wait It'll be some more hours of tired af 09-Apr-19 11:59 AM guess you can't win with things like that 09-Apr-19 11:59 AM but I got to know some people and was offered some samples 09-Apr-19 12:28 PM owo 09-Apr-19 12:28 PM samples are fun 09-Apr-19 12:29 PM ohh yes 09-Apr-19 12:29 PM hopefully finally a good mca 09-Apr-19 12:54 PM MCA? 09-Apr-19 12:54 PM multichannel analyzer 09-Apr-19 12:54 PM ah ah 09-Apr-19 12:55 PM the thing that turns a normal detector signal into a spectrum 09-Apr-19 12:55 PM X axis is pulse amplitude and Y is number of pulses recorded 09-Apr-19 12:55 PM right, because they are generally very weak signals that need good amplifiers and a LOT of A to D on multiple spectrums and stuff to get good resolution right? 09-Apr-19 12:55 PM right and other data stuff like that 09-Apr-19 12:55 PM those are generally rack mount boxes with modular stuff right? 09-Apr-19 12:55 PM the guy I've been getting myconflat from has a ton of modules for stuff like that but no chassis... 09-Apr-19 12:55 PM otherwise I'd get a bunch of it probably 09-Apr-19 12:56 PM most detectors have an internal preamp and give 0-10V signals 09-Apr-19 12:56 PM and the ADCs don't have to be that fast, thanks to sample and hold stuff 09-Apr-19 12:57 PM the chassis are no more than a bunch of stable voltage rails I believe but 09-Apr-19 12:57 PM only have to be fast if you want high counting rates 09-Apr-19 12:57 PM aye, the bins are only supply 99.9% of all cases 09-Apr-19 12:57 PM there are often nim bins for cheap on ebay.com 09-Apr-19 12:57 PM most buy now seem to be ~$250 09-Apr-19 12:57 PM but bidding seldom go above 100 09-Apr-19 12:57 PM at least that's the case here 09-Apr-19 01:16 PM bins? 09-Apr-19 01:16 PM your using some odd names I'm not familar with for this stuff heh 09-Apr-19 01:16 PM oh I guess thats the name for those things 09-Apr-19 01:16 PM how did they get the name nim bin? XD 09-Apr-19 01:16 PM I totally need a nim bin, maybe almost purely for the asthetic 09-Apr-19 01:18 PM those are generally rack mount boxes with modular stuff right? the guy I've been getting myconflat from has a ton of modules for stuff like that but no chassis... Sounds like nim to me 09-Apr-19 01:18 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20190409_221749-70010.jpg 09-Apr-19 01:18 PM its not... NIM it was its own standard I see NIM has this weird connector at the BOTTOM of the module 09-Apr-19 01:18 PM the stuff he had has a a card edge at the TOP 09-Apr-19 01:18 PM but I totally want some NIM now 09-Apr-19 01:18 PM like omg you just make my wallet hurt more than it already is 09-Apr-19 01:18 PM I had no idea how to find this stuff and now I do and I blame you 09-Apr-19 01:18 PM XD 09-Apr-19 01:18 PM https://www.ebay.com/itm/BERTAN-7-5KV-HIGH-VOLTAGE-SUPPLY-MODEL-377N-NIM-BIN-TP129/401739565364 09-Apr-19 01:18 PM like omg this cute HV supply 09-Apr-19 01:18 PM https://www.ebay.com/itm/HP-5582A-Linear-Amplifier-Nim-Bin-Module-HWY/303036162335 09-Apr-19 01:18 PM yea these modules get CHEAP in the US apparent lol 09-Apr-19 01:20 PM hehehe 09-Apr-19 01:20 PM I got you hooked on the good stuff 09-Apr-19 01:21 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/DSC_1860-73531.jpg 09-Apr-19 01:21 PM also this was like half that guy's place I've been buying conflat from 09-Apr-19 01:22 PM that's how it's supposed to look 09-Apr-19 01:22 PM you're doing something wrong if you still got some space to live in 09-Apr-19 01:23 PM heh... he is just reselling stuff he has no real interest in it 09-Apr-19 01:23 PM not that my place looks much better 09-Apr-19 01:23 PM naw 09-Apr-19 01:23 PM what's his source? 09-Apr-19 01:23 PM he says he has a friend who ships him stuff.... 09-Apr-19 01:23 PM I assume a friend who is working or has worked at or is cleaning out IBM East Fishkill... 09-Apr-19 01:23 PM because one of the bags totally had IBM label on it 09-Apr-19 01:23 PM and yeaaaa thats the only IBM place in the area I could image that has all that stuff in one place 09-Apr-19 01:24 PM don't you have connections there? 09-Apr-19 01:25 PM I have a friend who is subcontracting to a company that leases out of there doing silicon fab stuff at the moment 09-Apr-19 01:25 PM and they are going to be dumping a few gaylords of stuff into his posession next week :) 09-Apr-19 01:25 PM he has a box truck and found out they were PAYING to get rid of stuff 09-Apr-19 01:25 PM hehehe 09-Apr-19 01:25 PM so he was like, I'll take it for FREE 09-Apr-19 01:25 PM apparently mostly lab stuff this time 09-Apr-19 01:25 PM I'm excited 09-Apr-19 01:26 PM sweet 09-Apr-19 01:26 PM good luck there 09-Apr-19 02:06 PM thanks, hopefully there are some interesting silicon process specific tools I can use :) 10-Apr-19 01:45 AM wow, nice 10-Apr-19 01:45 AM let us know if there's anything left for grabbing after you get done! 10-Apr-19 01:45 AM that bertan power supply looks like it's got pretty good ripple regulation https://userweb.jlab.org/~brads/Manuals/Hardware/Bertran_375P_NIM_HV.pdf 10-Apr-19 01:45 AM https://www.quora.com/What-is-the-difference-between-line-regulation-and-load-regulation-in-interpreting-the-datasheet-of-a-regulator 10-Apr-19 09:01 AM looks like I'm finally renting a garage 10-Apr-19 09:01 AM got some new stuff today the doesn't fit in my room for sure 10-Apr-19 12:18 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/be9d8cebc23dc642-D991A.png 11-Apr-19 02:07 AM lol 11-Apr-19 12:50 PM wellp, I'm to old young for this 11-Apr-19 12:50 PM I need help with old(ish) PCs and RS232 11-Apr-19 12:50 PM windows 95 / MSDOS 11-Apr-19 12:50 PM I've got a device with a 25 pin sub d connector labeled RS232-C 11-Apr-19 12:50 PM and a couple of 25 pin to 9 pin adapters and a couple of different cables 11-Apr-19 12:50 PM and it looks like my PC doesn't want to talk to that device 11-Apr-19 12:50 PM I've heard of null modem cables which seem to switch Rx/Tx? 11-Apr-19 12:50 PM But I don't know what's commonly used with what 11-Apr-19 12:50 PM @Conmega maybe? 11-Apr-19 01:39 PM Null modem is pretty common, worth a shot 11-Apr-19 01:40 PM will try that, thanks 11-Apr-19 01:40 PM is there some way to figure out the baud rate, parity etc stuff? 11-Apr-19 01:40 PM I've got no documentation on the device and the software wants me to input all of that data 11-Apr-19 02:21 PM for baud rate and parity, you can pretty much just fuzz the device (i.e. keep asking it for something, like a device ID, or some status message, etc... while changing parameters until you see the right data returned) 11-Apr-19 02:21 PM you can likewise do the same to determine rx and tx 11-Apr-19 02:21 PM a 25 pin cable doesn't seem like a standard RS232 cable though, so you might have some trouble just sifting through and trying all the pins 11-Apr-19 02:21 PM if you can get the device to send out some beacon, aka a status message at a constant rate without asking it, that would make things a bit easier 11-Apr-19 02:23 PM sadly that's not possible 11-Apr-19 02:23 PM afaik 11-Apr-19 02:24 PM do you know any of the commands? 11-Apr-19 02:24 PM for the device? 11-Apr-19 02:24 PM the thing buffers some ADCs to drip-feed the data into a PC 11-Apr-19 02:24 PM nope 11-Apr-19 02:24 PM oh man, good luck 11-Apr-19 02:24 PM thanks 11-Apr-19 02:24 PM you just increased your hardness by like 255X 11-Apr-19 02:24 PM (assuming the commands are single bytes) 11-Apr-19 02:25 PM bonus points: There are dozens of jumpers in there and I don't know what any of them do 11-Apr-19 02:25 PM it outputs GPIB or RS232, may be that some jumper sets the output 11-Apr-19 02:26 PM do you have an arduino mega board? 11-Apr-19 02:26 PM the ones with like 60 pins? 11-Apr-19 02:26 PM Aye 11-Apr-19 02:26 PM hmm, but the voltage isn't compatible 11-Apr-19 02:26 PM I made an RS232 shield for a mega board a while ago 11-Apr-19 02:26 PM I momentarily forgot about the +/- voltage, and was thinking maybe you could just connect up all the pins at once and write a fuzzing program 11-Apr-19 02:27 PM I can't programm 11-Apr-19 02:27 PM eh, it wouldn't be too hard for someone to help you 11-Apr-19 02:27 PM probably like 30 lines 11-Apr-19 02:27 PM a for loop for each parameter to adjust 11-Apr-19 02:27 PM but the voltage makes it so you'd need to manually swap wires 11-Apr-19 02:27 PM which slows things down immensely 11-Apr-19 02:27 PM I guess you could probably start eliminating pins first by checking which of the 25 are grounds 11-Apr-19 02:30 PM there are standardized 25 to 9 adapters 11-Apr-19 02:31 PM yeah, assuming the company followed standards I guess 11-Apr-19 02:31 PM in that case, a program would be pretty easy to write 11-Apr-19 02:31 PM I'd use pyserial in Python probably 11-Apr-19 02:32 PM hmm 11-Apr-19 02:32 PM I'm gonna look into that, thanks! 11-Apr-19 02:32 PM something like this to start https://stackoverflow.com/a/47966547/253127 11-Apr-19 02:32 PM then add another FOR loop for the parity, and another for the command to try 11-Apr-19 02:32 PM you have a USB to serial adapter? 11-Apr-19 02:32 PM so you can test on a normal, modern PC. 11-Apr-19 02:33 PM Aye 11-Apr-19 02:33 PM I don't know any of the commands for the buffer, I don't know if it would answer anything with the wrong ones 11-Apr-19 02:35 PM yeah, that should be fine 11-Apr-19 02:35 PM unless there's some command to disable the device until a power cycle, or change a setting to destroy something 11-Apr-19 02:35 PM just loop over range(255) and send each number 11-Apr-19 02:37 PM haven't figured out the self destroy command yet but at least I got the blasting cap out of the high explosives 11-Apr-19 02:37 PM haha 11-Apr-19 02:44 PM something like this should get you started https://pastebin.com/90RDF1DR 11-Apr-19 02:45 PM wow, thanks! 11-Apr-19 02:45 PM guess I'll spend this weekend with trying to understand code 11-Apr-19 02:53 PM hehe 11-Apr-19 02:53 PM once you get Python installed, you need to install pyserial with this command: python -m pip install pyserial 11-Apr-19 02:53 PM you might need to download this file first, and run it https://bootstrap.pypa.io/get-pip.py python get-pip.py 11-Apr-19 02:54 PM I think you're assuming I'm not using windows 11-Apr-19 02:54 PM works any OS 11-Apr-19 02:54 PM I can't remember if Windows uses a different COM/serial port path string though (in the code) 11-Apr-19 02:54 PM yeah, windows it would just be "COM3" or whatever, instead of '/dev/ttyS0' that the code example shows 11-Apr-19 02:56 PM ah, ok 11-Apr-19 02:56 PM "good" Python code is OS-independent (portable) 11-Apr-19 02:57 PM yeah, and good buffers should have documentation with them 11-Apr-19 02:57 PM haha 11-Apr-19 02:57 PM the bane of "good" hackers 11-Apr-19 02:57 PM bad docs 11-Apr-19 02:58 PM mumbles something profane 11-Apr-19 02:58 PM the manufacturer went tits up years ago and on the archives of their website there's no mention of my stuff at all 11-Apr-19 02:58 PM and so little me got all the hardware and software 11-Apr-19 02:58 PM and an isa gpib card 11-Apr-19 02:58 PM and I really want to avoid having to buy a pc with isa 11-Apr-19 03:00 PM hopefully there's no magic "unlock" command that doesn't return any output, but prevents other commands from working 11-Apr-19 03:01 PM I bet there is 11-Apr-19 03:01 PM hard to say, a lot of companies just use "security by obscurity" 11-Apr-19 03:02 PM it's nim, so made for research 11-Apr-19 03:02 PM maybe there they thought making things open would be a good idea? 11-Apr-19 03:02 PM assume there will never be a programmer around to throw a few nested FOR loops at the thing and wait a few hours for the right parameters to be found 11-Apr-19 03:06 PM why can't they make stuff easy 11-Apr-19 03:06 PM no 11-Apr-19 03:06 PM why is the modern stuff so expensive 11-Apr-19 03:06 PM there are many plug and play modules that do the exact same thing with way more features that use USB and some software that is actually useable 11-Apr-19 03:06 PM but nooo 11-Apr-19 03:06 PM 5-10k for the hardware and 10-20k for the software 11-Apr-19 03:06 PM /rant over 11-Apr-19 03:06 PM well, thanks and good night ^^ 11-Apr-19 03:29 PM @GigaSquirrel start with 9600 8-n-1 most common default serial config on the planet 11-Apr-19 03:29 PM 8-n-1 is almost always the standard, so just try to change the baud until you see something useful 11-Apr-19 03:29 PM if you have any kind of manual for it let me know and I can scroll through it for information that may go over your head but I would know and tell me something to help infer something about the interface. 11-Apr-19 03:29 PM db-9 can be RS-232 or RS-485 SOMETIMES, RS-485 you can convert to 232... 11-Apr-19 03:29 PM We will figure it out 11-Apr-19 03:29 PM the other thing that would help a TONNNN is the inside of it 11-Apr-19 03:29 PM on the board near the db9 or whatever there should be a super standard been around forever chip like a MAX232 which is a serial line voltage booster/buffer, remember rs232 is on like arduinos are like 5v but rs-232 is like a 12V interface, you need interface chips to make sure you don't blow things 11-Apr-19 03:29 PM But yea if I can get a board photo I can figure out from chips and datasheets what your looking at pretty easily 11-Apr-19 03:48 PM I'd check the baudrates common during that point in time 11-Apr-19 03:48 PM DB-25 as a serial port is the original incarnation of RS232, so would spusepct that itäs something quite slow. 11-Apr-19 03:48 PM If for no other reason than that the computer afther it would be quite slow. 11-Apr-19 03:48 PM I'd check the "TX" pin on it on a scope to see if it transmits anything when power cycled. 11-Apr-19 03:48 PM That would help narrowing down the baud rate and then it's about finding the stop bits and other stuff 11-Apr-19 05:53 PM @Conmega arduino's have UART, not RS232 11-Apr-19 05:56 PM Fair enough. Lol. 12-Apr-19 01:46 AM I only have a manual for the software, which says nothing about the module itself 12-Apr-19 01:46 AM I'll make some pics 12-Apr-19 01:46 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20190412_104749-CD1EE.jpg 12-Apr-19 01:46 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20190412_104758-C7719.jpg 12-Apr-19 01:46 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20190412_104823-12C7B.jpg 12-Apr-19 01:46 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20190412_104710-AE6A9.jpg 12-Apr-19 01:46 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20190412_104732-C32BE.jpg 12-Apr-19 01:46 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20190412_104840-7C615.jpg 12-Apr-19 01:46 AM the cables connect to pin 2 (green), pin 3 (brown) and pin 7 (blue) on the 25 pin connector 12-Apr-19 01:46 AM https://pdf1.alldatasheet.com/datasheet-pdf/view/103265/ETC/R65C51.html That chip seems to do the RS232 stuff 12-Apr-19 02:01 AM Check the labview drivers maybe? 12-Apr-19 02:01 AM haven't found any 12-Apr-19 02:02 AM Dump proms? 12-Apr-19 02:02 AM I have found commands for serial in proms a few times, just plain text 12-Apr-19 02:02 AM guess that's worth a shot 12-Apr-19 02:03 AM /me glares at selectively undocumented parts of microscopes 12-Apr-19 02:04 AM Thats a problem for when time zones are not messing with me though 12-Apr-19 02:04 AM Time zones are awful. West coast to east coast is hard 12-Apr-19 02:08 AM +1 12-Apr-19 02:08 AM no clear text in the first two eproms 12-Apr-19 02:09 AM Are they interleaved? 12-Apr-19 02:10 AM what does that mean? 12-Apr-19 02:10 AM Can you toss me the bin files real quick? 12-Apr-19 02:10 AM DM? 12-Apr-19 02:10 AM sure, one sec 12-Apr-19 02:10 AM I'll just upload them here 12-Apr-19 02:10 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/MBUFFER_2.5_BIT_8-64122.BIN 12-Apr-19 02:10 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/MBUFFER_2.5_BIT_0-68713.BIN 12-Apr-19 02:13 AM Can you send photos of them on the board? 12-Apr-19 02:13 AM last pic of my dump up there, top right 12-Apr-19 02:15 AM Yeah they look interleaved give me a sec 12-Apr-19 02:15 AM Those are 16 bit roms yeah? 12-Apr-19 02:15 AM What processor is the thing running? 12-Apr-19 02:21 AM Dip 28 so 12 bit I think? 12-Apr-19 02:21 AM CPU is a motorola MC68000P8 12-Apr-19 02:23 AM What language is the device in? 12-Apr-19 02:24 AM english or italian or german 12-Apr-19 02:24 AM software can do either 12-Apr-19 02:24 AM I am getting some stuff that looks like a menu, but it wont display non numeric characters if i have the wrong language 12-Apr-19 02:24 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/unknown-4DB40.png 12-Apr-19 02:24 AM Ok im starting to see some stuff that makes sense 12-Apr-19 02:24 AM Try looking through this files 12-Apr-19 02:24 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/interleave16-87811.bin 12-Apr-19 02:24 AM The is the interleaved result of your proms 12-Apr-19 02:24 AM Are there more eproms? 12-Apr-19 02:24 AM I think im missing a lot of data 12-Apr-19 02:34 AM nope 12-Apr-19 02:34 AM may just be that the roms are dying 12-Apr-19 02:35 AM No, its like im missing every other bit 12-Apr-19 02:35 AM oh 12-Apr-19 02:35 AM well there are slots for 4 more roms, but they're not populated 12-Apr-19 02:35 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/unknown-38419.png 12-Apr-19 02:35 AM Im seeing stuff like this 12-Apr-19 02:35 AM Which is usally an indication that im missing something 12-Apr-19 02:35 AM Le me make sure the interleaving workded, that failing could cause this 12-Apr-19 02:35 AM Is there a chance there are proms under the ones you see? 12-Apr-19 02:39 AM nope, there are none 12-Apr-19 02:39 AM just some TTL below that 12-Apr-19 02:47 AM Oh my god 12-Apr-19 02:47 AM I think its interleaved into itself 12-Apr-19 02:48 AM what is interleaving in this context? 12-Apr-19 02:48 AM Every other bit comes from a difrent prom 12-Apr-19 02:49 AM that way multiple proms form one big file? 12-Apr-19 02:49 AM Yeah 12-Apr-19 02:49 AM This is just stacked in some odd way 12-Apr-19 02:49 AM So its both 2 proms, and then interleaved 2 different address spaces in total. 12-Apr-19 02:49 AM Can you check the setting you used to dump it? 12-Apr-19 02:52 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/unknown-67D46.png 12-Apr-19 02:52 AM what exactly do you need? 12-Apr-19 02:52 AM Just make sure you have it set up for the chip right 12-Apr-19 02:56 AM aye 12-Apr-19 02:59 AM So the second half of each file is a copy of the first half 12-Apr-19 02:59 AM Which is odd 12-Apr-19 02:59 AM and might be a problem with your eprom tool 12-Apr-19 02:59 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/unknown-F4634.png 12-Apr-19 03:00 AM redundancy maybe? 12-Apr-19 03:00 AM oh 12-Apr-19 03:00 AM no 12-Apr-19 03:00 AM lol 12-Apr-19 03:00 AM Did you have the prom in the slot right? 12-Apr-19 03:01 AM "bit 8" is a MC27265, but "bit 0" is a MC27128 12-Apr-19 03:01 AM which might explain the "foldback"? 12-Apr-19 03:02 AM Im seeing the same thing on both 12-Apr-19 03:02 AM huh 12-Apr-19 03:02 AM well in that case I am out of ideas 12-Apr-19 03:03 AM Im suspecting a problem with your reader 12-Apr-19 03:04 AM self check is successful 12-Apr-19 03:04 AM I don't know if that means anything 12-Apr-19 03:05 AM Do you have another prom with a known check sum you can try? 12-Apr-19 03:05 AM nope 12-Apr-19 03:05 AM Any blank proms? 12-Apr-19 03:05 AM I have some that I can delete 12-Apr-19 03:06 AM Why dont you try dumping them and seeing if they do this foldback thing 12-Apr-19 03:06 AM Are they the same type or rom? 12-Apr-19 03:07 AM one sec 12-Apr-19 03:08 AM This could also be a redundancy thing 12-Apr-19 03:10 AM no foldback 12-Apr-19 03:13 AM hm 12-Apr-19 03:13 AM This is fun 12-Apr-19 03:14 AM yep 12-Apr-19 03:17 AM Also congrats on the tactical nerd snipe deployment 12-Apr-19 03:22 AM :D 12-Apr-19 03:22 AM thanks 12-Apr-19 03:23 AM Can re dump bit 8? 12-Apr-19 03:25 AM having breakfast atm, will be back in ~30 minutes 12-Apr-19 03:25 AM Im going to go fall asleep then 12-Apr-19 03:25 AM Grab Hex Workshop and Binman if you want to try some stuff 12-Apr-19 03:26 AM good night and thanks for the help so far 12-Apr-19 03:27 AM Set hex workshop to legacy ascii and im using 16 bit interleaved on bin man, after spliting each file first. 12-Apr-19 03:27 AM You probably dont have to split but no need to have such a big file when its just a duplicate 12-Apr-19 03:29 AM I'll play around with that 12-Apr-19 01:23 PM you could also try flipping (reversing) the whole file(s) first, in case of endianess 12-Apr-19 01:23 PM or flip (reverse) each byte... again endianess 12-Apr-19 01:23 PM @GigaSquirrel it's funny to me that you don't know programming, but can dump a PROM seemingly in no time 12-Apr-19 01:25 PM I wanted to learn programming, so I bought a programmer 12-Apr-19 01:25 PM a parallel one, not just icsp 12-Apr-19 01:25 PM that can do pretty much everything 12-Apr-19 01:25 PM and with the included software it's so easy even I can do that 12-Apr-19 01:25 PM http://www.autoelectric.cn/en/tl866_main.html 12-Apr-19 02:25 PM Yeah minipro is NICE 12-Apr-19 02:25 PM I own one. Tho it's the model that cannot icsp program PIC's 12-Apr-19 02:25 PM But I have pickkit2 for that and usbasp AVR's 14-Apr-19 11:06 AM well I did not lern programming but I got another of those buffers to cross-check them 14-Apr-19 11:06 AM first let's try if the software likes #2 14-Apr-19 11:22 AM it does... nothing 14-Apr-19 11:22 AM no error, just the start screen 14-Apr-19 11:22 AM sigh 14-Apr-19 11:22 AM I'll be away for this week, once I'm back I'll throw a 'scope at it 14-Apr-19 11:53 AM oh, the software crashes 14-Apr-19 11:53 AM that's nice 14-Apr-19 11:53 AM it might not be the device after all 14-Apr-19 12:23 PM crashes in msdos as well as in win95 14-Apr-19 12:23 PM I've got an older version of it which might work 15-Apr-19 06:18 AM if a STM is for sale for say, $200 USD.. would it be worth looking into more? 15-Apr-19 06:18 AM looks like from 1991 or so, still in working order, but the program for it (along with something else I am looking at) appear to run on DOS, via floppies 15-Apr-19 06:18 AM I suppose once it works, simply sniffing the parallel/whatever bus the computer communicates on to figure out how to run the thing is all you need, just a step nearly required for old software.. (or reverse engineering the program, which likely is not complex at that point) 15-Apr-19 06:18 AM it does come with the computer, so that's a plus 15-Apr-19 06:18 AM stick in a network card and simply FTP or whatever the image after acquiring it is another option 15-Apr-19 06:18 AM would simply rather avoid situations like that 15-Apr-19 06:18 AM btw, referring to this guy: https://www.govdeals.com/index.cfm?fa=Main.Item&itemid=1408&acctid=7735 15-Apr-19 07:46 AM Yeah I been watching that thing. It's afm not stm as configured I believe 15-Apr-19 07:46 AM The cantalivers are consumables, fairly pricey, and not the easiest thing to Fab compared to stm tips 15-Apr-19 09:39 AM I'm also highly interested in the Langmuir trough, need to contact the guy in charge of selling to ask about the giant plexiglass stand and shipping 15-Apr-19 04:14 PM @GigaSquirrel if it uses gpib then the serial protocol may resemble gpib. I just saw that in an old manual. Me: why the weird binary stuff... Oh. 15-Apr-19 07:28 PM @Noxz well you could always probably run the DOS stuff in VirtualBox using freeDOS, or in linux with dosbox, something like that 15-Apr-19 07:28 PM if it needs some special ISA cards, then that's out... but if it's just serial/parallel, you can get USB adapters for those 15-Apr-19 07:28 PM I dont think it's too special of a card, but it is some sorta parallel thing 15-Apr-19 07:29 PM and running in something like virtualbox means you can use wireshark to spy on the communications 15-Apr-19 07:29 PM I missed out on a burleigh STM a year or so ago for like $200 on ebay 15-Apr-19 07:29 PM I think it was complete 15-Apr-19 07:29 PM or nearly so 15-Apr-19 07:30 PM this looks pretty complete.. I was looking at the langmuir trough by same seller and simply clicked on their other items 15-Apr-19 07:30 PM so I wasnt going after it specifically 15-Apr-19 07:30 PM but, if I need to ship something larger.. a small addition wont be too much 15-Apr-19 07:30 PM "We will not pick, pack, or ship." 15-Apr-19 07:30 PM so, might need to go in person :/ 15-Apr-19 07:31 PM even worse, $90 + $34 shipping https://www.ebay.com/itm/132499564158?ul_noapp=true 15-Apr-19 07:31 PM I guess @AdamMcCombs might be a good mentor for building an STM... can you say roughly how many hours it took you Adam? 15-Apr-19 08:10 PM @Noxz interesting re: L B trough, I hadn't heard of them before, but they (pretty much) make sense. This says Win 2000 and XP though, not DOS http://www.rheology.cn/company_manage/product_yangben/rheology2008219172235.pdf 15-Apr-19 08:11 PM I didnt read too much into it.. bu tthe floppy disc in the image of the item for sale had instructions as to how to install.. and it stated something like type a:\setup.exe 15-Apr-19 08:11 PM not double click.. 15-Apr-19 08:11 PM I'd hope what is in that manual is available, but I couldnt really find a download at first searchj 15-Apr-19 08:11 PM LB will be the tech that I pursue for graphene amongst other things.. there is at least a whole chapter in the book I have regarding making semiconductors based on them 15-Apr-19 09:12 PM could just be that they didn't use a windows installer, but yeah you might be right too 15-Apr-19 09:30 PM I also somehow doubt the new software fits on a floppy disc or two 15-Apr-19 09:36 PM I used to bring home southpark episode clips from my dad's college (he was a student) when I was a kid, so I could see a super simple GUI and interface in C++ maybe being possible, especially with compression.. this post seems to say their simple GUI was 750K, and about half that with compression https://users.rust-lang.org/t/minimal-executable-size-win-32-bit/1900/3 15-Apr-19 09:36 PM and that's in RUST which has more protection and thus more overhead, not C++ (C++ app is 400k) 15-Apr-19 09:36 PM but yeah, it's hard to say 18-Apr-19 06:09 AM wow.. got a GREAT freight shipping quote if you drop off the item at a shipping terminal instead of a residential (or even commercial) pickup.. just need to get my dude to have enough time to do it all 18-Apr-19 06:09 AM maybe I can add another machine in there 18-Apr-19 01:50 PM @Noxz re graphene production, this open-source CVD system howto (build) has a graphene recipe in the supplement https://journals.plos.org/plosone/article?id=10.1371/journal.pone.0210817 18-Apr-19 01:51 PM Thanks, but I have a pretty god "recipe" that I am pursuing (did not come up with it myself) 18-Apr-19 01:51 PM Good* 18-Apr-19 02:04 PM I think i read that journal already, will double check once home 18-Apr-19 03:48 PM http://microchem.com/Prod-Microspray.htm 18-Apr-19 03:48 PM Want ^ 18-Apr-19 06:45 PM 'Decorative etching' ah yes. cosmetic MEMS 18-Apr-19 06:45 PM nanosteampunk :D 18-Apr-19 06:45 PM hey so i'm getting up to some mischief and i have a q for the radiation nerds in the crowd 18-Apr-19 06:45 PM what's the ion chamber equivalent of, like, a Ludlum 3? inexpensive, durable, generally a solid starting point 18-Apr-19 06:45 PM bonus points if i can extract a useful measurement signal out of it for remote measurements without soldering 18-Apr-19 06:45 PM i guess ludlum has the 9-3, hm 18-Apr-19 11:41 PM ludlum has a couple of ion chambers, what are you looking for? 18-Apr-19 11:41 PM I don't think there's a detector that accepts external ion chambers 19-Apr-19 12:05 AM What are you planning, ion chamber dosimetry for pulsed power stuff? 19-Apr-19 11:15 PM Those great capacitor friends you got should certainly give you a nice pulse 19-Apr-19 11:38 PM Yep! 19-Apr-19 11:38 PM CDV715 would be a very commonly available and “standard” ion chamber prebuilt device - but not sensitive. 19-Apr-19 11:38 PM not very sensitive and maybe too slow 19-Apr-19 11:38 PM might be interesting to hack together those pen dosimeters and a electrometer 19-Apr-19 11:39 PM LND do have a range of ion chamber tubes https://www.lndinc.com/products/ionization-chambers/52102/ 19-Apr-19 11:39 PM But you would have to wire it up yourself 19-Apr-19 11:40 PM https://www.ebay.com/itm/132625239128 19-Apr-19 11:41 PM Or, soda can, a bit of epoxy and wire and mild vacuum, a dash of Ar or propane or whatever 19-Apr-19 11:41 PM air at regular pressure works fine 19-Apr-19 11:41 PM the detector itself is not the complicated thing, but the electronics 19-Apr-19 11:41 PM they have to be fast, extremely precise, since we're talking less than nanoamps here 19-Apr-19 11:41 PM and they have to be immune to a whole lot of EMP 19-Apr-19 11:41 PM as far as I know there is no real pulsed dosimetry available atm 19-Apr-19 11:44 PM Are we talking X/gamma or neutrons 19-Apr-19 11:44 PM of course all the passive stuff like film badges etc do pulsed very well, but nothing electronic 19-Apr-19 11:44 PM for an ionisation chamber we're talking photons 19-Apr-19 11:44 PM pulsed neutron dosimetry.... never thought about that 19-Apr-19 11:44 PM moderating might stretch the pulse enough to make that somewhat easy 19-Apr-19 11:46 PM Maybe just something with a high activation cross section. Depends if it’s just one pulse or repetitive. 19-Apr-19 11:46 PM that's how all neutron detection works 19-Apr-19 11:46 PM neutron induced activation / fission 19-Apr-19 11:48 PM Except those bubble nucleation things 19-Apr-19 11:48 PM ah, right 19-Apr-19 11:48 PM there is also the recoil stuff 19-Apr-19 11:48 PM Hmm organic fast scintillators might be a good approach 19-Apr-19 11:48 PM https://aip.scitation.org/doi/10.1063/1.1720123 19-Apr-19 11:49 PM I don't think fast is fast enough 19-Apr-19 11:49 PM I've never seen a scintillator with <1 ns decay time 20-Apr-19 09:01 AM hi 20-Apr-19 12:46 PM hello! 20-Apr-19 12:47 PM Hola 20-Apr-19 12:48 PM Frohe ostern! 20-Apr-19 12:48 PM oder so 20-Apr-19 01:25 PM @GigaSquirrel I used a Burr-Brown electrometer opamp to make a buffer once, and I found that when I had the buffer hooked to a ~100 mm square of foil, that of course the output would drift, but if I put another plate some 200mm away and biased it at ~20 V, then the output would stay put. I figured it was ions in the air from radon or whatever. 20-Apr-19 01:25 PM This was just in air. 20-Apr-19 01:26 PM I think you just built a capacitor that smoothed the input ^^ 20-Apr-19 01:30 PM Don't think so, the stray capacitance to ground would have been a lot higher, and also I could null the drift (bias current integrated by input capacitance), so a DC current was involved that was proportional to the bias. We would be talking fA currents. 20-Apr-19 01:31 PM but if you effectively built an ion chamber by putting a second, biased plate close to it would not be stable but react to radiation events 20-Apr-19 01:31 PM Heh neat thing, how sensitive to moisture content in the air was it? 20-Apr-19 01:50 PM There might have been some time variation, but the DC value was pretty stable overnight as I recall. Presumably the bias current does not have infinite impedance, so it reached some equilibrium rather than being unstable (as a good integrator would). I have no idea what components in the air might be contributing, but it really did seem to be an air effect. Analog guru Bob Pease tried an air capacitor in a low current, and it leaked. Ion currents was the reason he came to. To actually test I guess you could add some radiation. 20-Apr-19 02:21 PM What is the opposite of a hall effect sensor? like, are there any Magnetic ICs? basically an inductor [with a small gap for resolution] ? 20-Apr-19 02:21 PM magnetic tape recording head is basically the best example I could htink of, but it's hardly an IC 20-Apr-19 02:21 PM hard drives also use it.. https://en.wikipedia.org/wiki/Disk_read-and-write_head .. that may be sort of what I am after 20-Apr-19 02:34 PM IIRC there's a whole proper frontend in the head in modern drives 20-Apr-19 02:34 PM both for reading and writing IIRC 20-Apr-19 02:34 PM the new stuff like MAMR is super weird with microwave assisted heating and writing and stuff like that. 20-Apr-19 02:35 PM yeah, breifly looked into it, uses optics to some degree, too 20-Apr-19 02:35 PM but, my actual application I am pursueing is simply reading a magnetic tape as a position sensor 20-Apr-19 02:36 PM There's two compething next generation techniques, with MAMR being one of them. 20-Apr-19 02:36 PM but, to get better resolution, you need a very small tape head 20-Apr-19 02:36 PM the distance between read head and tape will likely be the limitting factor more than not 20-Apr-19 02:36 PM the 'hackaday' concept is basically record a sound frequency at the upper limit through a sony walkman, then mount the tape, and move the head back and forth for a delta positioner 20-Apr-19 02:37 PM I have used linear motors with resolution of tens of micrometers, verified against a nice laser distance meter. It was specified for something like 5cm max distance. 20-Apr-19 02:37 PM sony actually has such a product, called the Magnescale 20-Apr-19 02:37 PM Yeah Linear motors have magnetized shaft that is read with hall sensors 20-Apr-19 02:37 PM the purpose is as a DRO/linear scales for big machinery 20-Apr-19 02:38 PM 3x hall will give quite accurate positioning. 20-Apr-19 02:38 PM but small stuff could still be used to some degree 20-Apr-19 02:38 PM right, quadrature AB(+CD..) 20-Apr-19 02:38 PM Yep 20-Apr-19 02:38 PM so, apparently hard drive heads used a relatively simple lithography method 20-Apr-19 02:38 PM for making the coils 20-Apr-19 02:38 PM "thin film recording head" is my latest search phrase 20-Apr-19 02:42 PM Oh interesting 20-Apr-19 02:44 PM so, what I want is to use commercially available hall effect sensors as the reading heads... instead fo some ancient audio cassette head.. but as such I was curious about writing the tape in a similar IC - or rather how it could be done 20-Apr-19 02:45 PM why not use an optical scale? resolution too big? 20-Apr-19 02:45 PM then you could use a CDROM head 20-Apr-19 02:45 PM etc 20-Apr-19 02:45 PM well... it's more of the idea of DIYing with essentially a walkman cassette recorder/player 20-Apr-19 02:46 PM There is an "Erase head" and then depending on the mechanism there's a Recording head, or the reading head is just used in "reverse" to write the tape. 20-Apr-19 02:46 PM also, magnetics arent influenced by oils and junk that are common in machinery 20-Apr-19 02:46 PM optics are 20-Apr-19 02:46 PM maybe it's a non issue nowadays 20-Apr-19 02:46 PM This info is purely based on me tearing a bunch of tape mechanism appart as a kid. 20-Apr-19 02:46 PM I mean, optical scales are nearly a dime a dozen (not really) nowadays 20-Apr-19 02:46 PM but if you're working on metal machining, flakes of metal probably would affect 20-Apr-19 02:47 PM With a CDROM head it would be funny to watch people attempting to make it work reliably 20-Apr-19 02:47 PM rfs, right, and that's why I was wondering if because hall effect sensors exist, if there are magnetic ICs or what 20-Apr-19 02:47 PM Wouldn't you need sub-micrometer scale details for that? 20-Apr-19 02:48 PM shrugs 20-Apr-19 02:48 PM I've sort of been looking into this concept off-and-on for a few weeks thus far 20-Apr-19 02:48 PM IIRC there's no magnetic IC's, but there are preamps 20-Apr-19 02:48 PM also, if I get 1um resolution, I'd be more than happy 20-Apr-19 02:49 PM But I would take a look at hall-effect sensors in the smallest possible packages 20-Apr-19 02:49 PM the closest I could think of to a magnetic IC is a hard drive head 20-Apr-19 02:49 PM like DFN uDFN and if your sanity permits it, the BGA's and CSP, WLCSP and so on. 20-Apr-19 02:49 PM "The recording head has a single-layer 11-turn copper coil, a write track width of 1.4 um, and a yoke width of 50 um. The top and bottom yoke are 2 and 2.6 um thick and the write gap is 0.22 um. The top and bottom magnetic shields (S1, S2) are 2 um thick. The gap between the top magnetic shield (S2) and the bottom yoke (P1) is 0.25 um" 20-Apr-19 02:49 PM Because there's magnetic sensors inside cellphones and I doubt they are big. 20-Apr-19 02:50 PM you mean NFC? 20-Apr-19 02:50 PM No, just bare magnetic field 20-Apr-19 02:50 PM Bt I think many just use the compass chip for that 20-Apr-19 02:50 PM Which is also a thing, you can get magnetic compass as IC's 20-Apr-19 02:50 PM oh, yeah, there is a term for an all-in-one chip 20-Apr-19 02:51 PM but I'm unsure if they are fast enough for you. 20-Apr-19 02:51 PM compass, gyro, acceleraometer 20-Apr-19 02:51 PM IMU 20-Apr-19 02:51 PM innertial mass unit or something 20-Apr-19 02:51 PM also, half thinking about BLE instead of some hard wired thing.. would be plenty fast to relay info 20-Apr-19 02:51 PM so, the thin film stuff uses the same exact concept/design as the larger audio tape versions 20-Apr-19 02:51 PM coil around a soft iron "C" shape 20-Apr-19 02:51 PM just created using lithography methods 20-Apr-19 02:51 PM so, I wonder how good/small one could DIY a similar one at home - to be better than an audio head 20-Apr-19 02:51 PM I think that is the goal 20-Apr-19 02:51 PM better than HiFi Audio stuffs 20-Apr-19 02:51 PM also, I think it is time for a dog walk 20-Apr-19 03:00 PM I got this laser driver head that was all ready to go http://www.diyouware.com/DiyoPCB-MKI 20-Apr-19 03:00 PM open PCB with xbox360 laser head 20-Apr-19 03:00 PM all the driver stuff and auto-focus is usable 20-Apr-19 03:48 PM I think the magnetic compass chips use GMR sensors. You can also get them as separate components, I was looking at them a few years back. The thing about old fashioned tape heads is that they are inductive sensors, so not DC responding. That would be bad for an encoder which must register slow motion. GMR sensors are DC responding, so might work, but you would need pole pieces to couple the field to the chip. Don't know about now, but at one time the read head in a hard drive was GMR. 20-Apr-19 03:48 PM Hall effect chips are not very sensitive. 20-Apr-19 04:49 PM re magnetic ICs, I do know FeRAM exists, but that scale is a bit smaller than what I am after, also getting something made that is 1meter long may be problematic 20-Apr-19 04:52 PM is feram sensitive to magnetic fields or have they pretty much taken care of them for the most part? 20-Apr-19 04:53 PM I think they are all shielded 20-Apr-19 04:53 PM also, spring time is finally here.. 20-Apr-19 04:53 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/DSC_0275-D1C37.jpg 20-Apr-19 04:53 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/DSC_0272-36C3B.jpg 20-Apr-19 04:53 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/DSC_0265-62527.jpg 21-Apr-19 03:03 PM ?cat 21-Apr-19 03:03 PM Found one! 21-Apr-19 08:17 PM ?dog 21-Apr-19 08:17 PM Found one! 21-Apr-19 08:17 PM ?electron 21-Apr-19 08:17 PM ... 22-Apr-19 06:06 AM @Noxz Dalmatian! We used to have one, wonderful dog, tho crazy about sticks and balls. We got a "boomer ball", hollow but thick wall made of HDPE (rigid, not inflated). She would chase it around the yard growling and biting the heck out of it. 22-Apr-19 06:06 AM dude turned 2yrs old a month ago 22-Apr-19 06:06 AM Silhouette, or Silly for short 22-Apr-19 06:06 AM he isn't much of a fetcher outside.. especially if it is a stick, he'll just lay down and chew it up 22-Apr-19 06:06 AM inside he fetches balls and whatnot much better 22-Apr-19 06:06 AM less distractions 22-Apr-19 11:14 PM https://www.youtube.com/watch?v=7dPm5dLEwwQ 24-Apr-19 11:29 AM moin 25-Apr-19 06:00 AM I'm having huge EMI issues with sending PWM to a solenoid (valve).. some sensors in the same setup is getting bombarded with junk and things are triggering too early... how do you defeat such a thing? 25-Apr-19 06:00 AM 'shield the solenoid' may be out of the question, also shield the sensor isnt really posible 25-Apr-19 06:00 AM I'd actually like to test if the noise is coming from the solenoid driver board or the solenoid itself.. not really sure what to replace it with beyond a big shunt resistor 25-Apr-19 06:02 AM Ferrite 25-Apr-19 06:02 AM Snubber network 25-Apr-19 06:02 AM Snubber network could be really good with a solenoid 25-Apr-19 06:02 AM This comes down to exactly what is making and receiving the noise 25-Apr-19 06:02 AM If it's the wiring, ferrites, if it's the sensor, then shielding, if it's the solenoid, maybe a snubber 25-Apr-19 06:05 AM I need to figure something out, it's kind of ridiculous 25-Apr-19 06:05 AM I tried to average the analog in that I now need to use (of that sensor) but I am getting false positives 25-Apr-19 06:05 AM I knew I had EMI issue sbefore, but they never really presented themselves 25-Apr-19 06:13 AM I may read the datasheet on the solenoid driver IC (and the eval board I have) on if they reccomend a certain type of snubber 25-Apr-19 06:13 AM also, looking around for what I can harvest a ferrite core from 25-Apr-19 06:58 AM Plasma tvs 25-Apr-19 06:58 AM Lots of ferrites inside, it's high voltage high speed, they need all the emi suppression 25-Apr-19 06:58 AM Are you driving the solenoid with a non discreet signal? It's not just pulse use and it's being driven via pwm? 25-Apr-19 07:06 AM it's a peak-hold (current based, with a high voltage for the other solenoids I will eventually be driving, but this is only 12v) driver IC.. so I set the amperage I want (basically the linear position) 25-Apr-19 07:06 AM gotta go to school, can chat more about this later 25-Apr-19 07:06 AM MC33816 eval board, btw, if you wanted to look into it further 25-Apr-19 07:06 AM for diesel injectors 25-Apr-19 07:06 AM this specifically is the fuel limitting valve and the pressure valve 25-Apr-19 07:06 AM that are giving me pains 25-Apr-19 07:06 AM havent touched the injectors yet 25-Apr-19 07:58 AM I'll see if I can get a chance to poke at that documentation tonight, in that use case you will be fighting some fairly decent emi given the current and pulse length, you'd want to be careful putting crazy filtering on the solenoid wiring itself, you don't want to modify its drive signal, your best bet would be to shield the sensor as much as possible 25-Apr-19 07:58 AM This could be a good case for shielded wiring and/or differential signaling depending on the type of sensor 25-Apr-19 10:59 AM I actually have some dual pair, separately shielded with a ground wire, Belden wire.. I'll swap that on the sensor tonight, thanks for the idea 25-Apr-19 10:59 AM The sensor itself is the pressure sensor of the diesel common rail, already industrialy shielded/designed for the environment, but I did not have original wiring harness so I just slapped something to connect it 25-Apr-19 04:39 PM WHy are you PWM:ing the solenoid to begin with? 25-Apr-19 04:39 PM It's gona ring like hell. 25-Apr-19 04:39 PM Have you considered low pass filtering the PWM at the source first? 25-Apr-19 04:48 PM the solenoid/valve is linear, so if I need the valve half closed, or a quarter, etc, it requires a modulated signal for the right current. I am using an evaluation board, so I didnt design any of the circuitry, nor the solenoid.. I do have some options as to the frequency and whatnot, but I also need heat to dissapate so it shouldnt be too high (from what I understand) 25-Apr-19 04:48 PM I'll put the new wire (Belden 88723) on in a bit.. first on the sensor, then if I can (due to ampacity, 22AWG = 3A, and the max I put through is 2A on one of the solenoids, so I should be good) on the solenoids 25-Apr-19 04:53 PM There are some current mode opamps, that plus an adc could be interesting 25-Apr-19 04:53 PM it's also two pairs, so if need be I could double up for the solenoids 25-Apr-19 04:53 PM this is a ASIC, that I've already vested time (and a lil bit of monies) into, and appears to do the jerb just fine.. it's likely my setup more than the board 25-Apr-19 04:53 PM I actually would likely use the PT2000 which has 6 (instead of 4) peak-holds, along with morecurrent senses, which is something I am semi-lacking on this one 25-Apr-19 04:53 PM I have two main solenoids, one is not linear - but you can still PWM it to use less power (save a couple watts, sure) and then this other linear one 25-Apr-19 04:53 PM anyways, dog-walk time 25-Apr-19 04:53 PM got the wire out and will rig things up when I get back 25-Apr-19 04:53 PM (after food) 25-Apr-19 04:53 PM btw, the wire I will be using: https://catalog.belden.com/techdata/EN/88723_techdata.pdf 25-Apr-19 04:53 PM the sensor has two outputs, too 25-Apr-19 04:53 PM for redundancy 25-Apr-19 05:03 PM bought two of these to get fresh-er americium sources https://www.aliexpress.com/item/NAP-07-NAP07-HIS07-HIS-07-Ion-Chamber-Smoke-Sensor-Ionization-Smoke-Detector/32838644316.html 25-Apr-19 05:28 PM neat 25-Apr-19 08:32 PM swapped out the wire on the sensor (easier said than done, thanks to waterproof terminals, and no spares on hand).. but I am still getting EMI.. may try the solenoid(s) wires next.. was really hoping that would have worked though (the sensor wires go to a breadboard that then the uC has a jumper cable connecting into it - worth a mention as I am sure that could pickup stray EMI) 26-Apr-19 12:52 AM @Noxz " it requires a modulated signal for the right current" are you really really sure that dev board didn't simply fail to test sensors in their setup? The new wires you hooked up, did you make sure to ground all the foil/etc jackets? 26-Apr-19 12:52 AM @Noxz if you're only requiring to deliver a linear current to the solenoid, I second the idea of trying to low-pass filter closer to the driver board... the solenoid itself will perform this action, but you're after reducing the action of the PWM on the wires acting like a radiative antenna 26-Apr-19 12:52 AM if you can keep the radiative section as small as possible, leaving the remaining length of wire relatively lower-frequency, it could def help 26-Apr-19 12:52 AM also you might want to throw a resistor in between the ground and the sensor... or between the jacket shielding of the solenoid wires and the grounding point 26-Apr-19 01:00 AM This is going well 26-Apr-19 01:00 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20190426_002014-5BBAE.jpg 26-Apr-19 01:13 AM looks like someone hit it with a truck 26-Apr-19 01:14 AM Looks like someone is trying to fix a complex circuit with no schematics and has to trace it out by hand, through every circuit it runs through 26-Apr-19 01:15 AM oh 26-Apr-19 02:52 PM after making sure it was all clamped, still getting some EMI (some=alot).. 26-Apr-19 02:52 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/DS1Z_QuickPrint40-4DF70.png 26-Apr-19 02:52 PM the yellow is the voltage to the solenoid.. the blue is a sensor line that is 1 foot away 26-Apr-19 03:09 PM clamped a lil better.. still working on it though 26-Apr-19 03:09 PM what is it going to do in a car? 26-Apr-19 04:26 PM how about adding a low pass filter? 26-Apr-19 05:11 PM just used the same shielded wire on the solenoid's wire, no luck.. let me try this filter dealio 26-Apr-19 05:11 PM knowing how long the spikes are, I should be able to filter that as a certain high frequency, right? 26-Apr-19 05:11 PM last time I made any, I think it was for stereo stuff, not sensitive sensors 26-Apr-19 10:34 PM @Noxz I haven't used my Rigol in a while, can you confirm if the whole (displayed) window is 10 uS wide? 26-Apr-19 10:34 PM if so, those jaggies look like maybe 100kHz 26-Apr-19 10:35 PM Its ea tick on the grid 26-Apr-19 10:35 PM oh, ha, I had my brightness so low I couldn't see the grid 26-Apr-19 10:35 PM I see it now 26-Apr-19 10:36 PM I experimented some with filtering, more to do layer 26-Apr-19 10:36 PM Later 26-Apr-19 10:36 PM Doggie play date right now 26-Apr-19 10:37 PM so I guess 1MHz then? 26-Apr-19 10:37 PM I guess I'd start with an LC or RC filter calculator 26-Apr-19 11:23 PM RC is what I've tried thus far, on the sensor.. 26-Apr-19 11:23 PM I need to try more values 26-Apr-19 11:23 PM I think it's worked to some degree, but I havent tuned it right yet 27-Apr-19 09:31 AM Try using twisted pair from driver to solenoid, and keep the wires apart. It is impossible that the signal is coupling from the solenoid magnetic field itself if it is that far away. I suspect wiring and grounding. Yes, ferrites can help a lot. I like to take a big toroid and wrap several turns of the cable thru (common mode choke). Almost any large core you find will work (though you might run across a large RF ferrite at eg. a hamfest, which is bad here). If the sensor signal does not need to be high speed then you can also gain hugely using a simple RC low pass near the ADC input. Make sure the capacitor is going to a clean ground shared with the ADC. 27-Apr-19 09:35 AM Hammering raw PWM to a solenoid is gona ring due to the solenoid inductance. 27-Apr-19 09:37 AM One way to understand how a common mode inductor works is that it allows the various grounds in the system to float at high frequencies without interfering with high frequency signals contained within the cable. 27-Apr-19 09:37 AM @rfs yes, but driving pwm right into a coil is also a common and reasonable practice. there's probably a diode to the supply in the driver chip, so the main issue is the dv/dt causing the coil to ring at its resonant freq. A snubber would help, especially if at the coil. 27-Apr-19 09:42 AM yep 27-Apr-19 10:00 AM BTW, if you need some twisted wire, make it yourself. Clamp the bunch of wires in a vise, the other end in the chuck of an electric drill, and twist away. A great way to make cables even if you don't particularly need the EMI reduction feature. 27-Apr-19 10:21 AM Yep. Done that myself at home and work. 27-Apr-19 10:21 AM also works for making poor boy litz wire from emal coated copper wire. 27-Apr-19 01:46 PM thanks guys, will hack on this a bit later.. did some yard work and whatnot - still have a few things left to do before I sit down at the flow bench again 27-Apr-19 01:46 PM did you lookup that belden wire I am using? it's pretty decent 27-Apr-19 01:46 PM https://catalog.belden.com/techdata/EN/88723_techdata.pdf 27-Apr-19 01:46 PM twisted pairs - but I dont know if the pairs are twisted (or is that what it means?) 27-Apr-19 01:46 PM I doubled the wires (used a single pair at ea pole) of the solenoid 27-Apr-19 01:46 PM for the ampacity 27-Apr-19 01:46 PM but, ea pair is foiled, and there is a decent ground wire running with the foil 27-Apr-19 01:46 PM also, I am using two dedicated power supplies (negatives and grounds clamped together), a 5v and a 12v.. 12v powers the eval board, yet the uC gets power from a USB charger, the 5V powers the sensor.. I could possibly migrate the sensor to a voltage divider on the 12v line to maybe make things better.. I don't think I have a 7805 laying around 27-Apr-19 01:46 PM the ground of the uC is tied onto the grounds/negatives of the other supplies via breadboarding 27-Apr-19 01:46 PM just a simple rundown of what I have clamped 27-Apr-19 01:46 PM dog walk time, bbl 27-Apr-19 07:01 PM so, while chatting with the guy who started the ECU project, as a rubber ducky ( https://en.wikipedia.org/wiki/Rubber_duck_debugging ) we figured that because the sensor has two oppossing outputs, we can compare, and if not self referencing, then throw the measured value away until next time.. it doesnt fix the EMI problem, but it is a very valid work around that would have eventually been implemented later on (more of a signal integrity) 30-Apr-19 07:57 PM @Noxz adding the filter at the sensor isn't what we were suggesting, we were suggesting adding the low-pass filter on the PWM line near the driver... such that you aren't transmitting the high-freq PWM over such long wires (antennas) 30-Apr-19 07:59 PM well, the workaround is still semi working.. need to debug a few things, but I am not really concerned with the EMI since there was such a workaround 30-Apr-19 07:59 PM the circuit is an eval board too, so trying to tap onto it isn't the easiest.. still doable, sure 30-Apr-19 10:19 PM it just needs to be closer to the driver than not... reduce the amount of antenna the high-freq radiation is allowed 30-Apr-19 10:19 PM i.e. inches away is probably better than nothing 02-May-19 06:18 PM @Treehouseman i never had to replace my turbo, but i did have to clean the variable vanes with oven cleaner... Luckily had a tube with a sprayer tip that connected to the oven cleaner can 02-May-19 06:22 PM I was looking at an upgrade to a vnt17 instead of a stock vnt15 02-May-19 06:22 PM But I'm about to do a consumable overhaul, all the belts, idlers, tensioners, clutch, single mass flywheel, control arms, wheel bearings, seals, and other assorted worn items 02-May-19 06:33 PM Heh, i considered the single mass flywheel years ago, but went dual mass anyway just thinking it would improve shift smoothness 02-May-19 06:33 PM Had the timing belt done by a guy when it needed it 02-May-19 06:33 PM Had an idler or tensioner go on me once, was recharging the car every night since the alternator wouldn't charge, it wasnt terrible without power steering 02-May-19 06:33 PM Did wheel bearings back then too 02-May-19 06:33 PM Like 8 years back at this point 02-May-19 06:33 PM Don't really drive the car anymore, got a leak in there passenger footwell and the interior has suffered a bit since i live in a rainy climate 02-May-19 06:33 PM Keep it under a car cover lately, and bought a new truck with electronic locking differentials all around, since i hike a lot 02-May-19 06:33 PM I replaced the injectors a few years ago thinking it would help bad exhaust smell, went barely oversized 02-May-19 06:33 PM Wish i knew someone who would take apart the interior and steam clean everything, reassemble with new rubber to reduce vibration noises 02-May-19 06:44 PM The carpet isn't hard to get up, and the leak is probably the same that happened to mine, clean out the leaves from in front of the outside air vent on the passenger side of the firewall 02-May-19 06:44 PM I thought it was coming from the sunroof and wen't nowhere for a good week or so until I realized it was leaves overtop the cabin air filter and crap 02-May-19 06:45 PM I'm tinkering on the engine tonight.. breifing "the team" on t he EMI issues 02-May-19 06:45 PM they want me to test out a new board and I questioned adding spots for low pass filters 02-May-19 06:46 PM @Noxz good luck! 02-May-19 06:47 PM the workaround in place seems to work alright, but still not the best 02-May-19 06:47 PM @Treehouseman yeah i cleaned the leaves , seems like maybe i have the wrong filter, saw something about a pre filter that might shed water better or something 02-May-19 06:47 PM I probably should just sell the car, but it's hard to let go since it runs fine and I've put so much sweat equity into it 02-May-19 06:47 PM Pretty much the entire interior needs a deep clean... Some mold developed when i was ignoring the leak for a few weeks, i basically just took paper towels and a spray bottle of ethanol to all the surfaces 02-May-19 07:16 PM uh-oh.. uC is no longer talking via debug.. 03-May-19 06:11 AM Personally I would just make a PWM-controlled linear, analog current source 03-May-19 06:17 AM why not impose feedback? 03-May-19 06:17 AM also, yeah, this KL25Z freedom board appears half dead 03-May-19 06:17 AM I can attempt to update the bootloader, but then nothing more 03-May-19 06:17 AM it doesnt go into debug mode 03-May-19 06:17 AM also, on my way out the door.. 03-May-19 06:19 AM Low side mosfet and a current sense resistor from source to ground, source to the inverting input of a mosfet that drives the gate, and rc filtered PWM into the noninverting input. That is feedback for the current setpoint, but it avoids banging high current PWM into an inductive load 03-May-19 08:50 AM https://twitter.com/ConnorKrukosky/status/1124340407452803072 03-May-19 08:50 AM I would like some input on this from others if anyone could take a moment to vote on this poll. I have a feeling I know what most people here would pick, but I'd still be curious what you all thing :) 03-May-19 09:11 AM Sure, why not! 03-May-19 09:11 AM I say go for it! 03-May-19 01:52 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/unknown-59174.png 03-May-19 01:52 PM Oh I love this... Our item didn't sell... What can we do to sell it? Uhm... RAISE THE PRICE! 03-May-19 01:52 PM Just wow... 03-May-19 01:52 PM Something I knew I'd need in the future, so I just left it open, didn't even watch it or anything, and they rose the price after the item ended. 03-May-19 01:52 PM If they rose it and added a make offer, ok that makes sense I suppose for a longer term listing... But seriously? 03-May-19 01:52 PM Just raise it and sit on it? Grr 05-May-19 12:37 PM @Charles do you have a picture of your gauge? 05-May-19 12:40 PM They are at work. I will post pictures tomorrow 05-May-19 12:40 PM ok ^^ 05-May-19 12:40 PM tag me of you do 05-May-19 12:41 PM Until then please enjoy this wall of old diffusion pumps. All still good. 05-May-19 12:41 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/image0-58DFF.jpg 05-May-19 12:42 PM heh, nice 05-May-19 12:43 PM General picture of my messy garage. Working on the vertical Litton lathe in the middle today. Rescued two of them last week from certain death 05-May-19 12:43 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/image0-3B247.jpg 05-May-19 12:44 PM ohh, very nice 05-May-19 12:44 PM what are you doing with the tube furnace? 05-May-19 12:48 PM Mostly hydrogen reduction cleaning 05-May-19 12:48 PM I do vacuum tubes 05-May-19 12:51 PM special tubes for some application or just "regular" ones because you can? 05-May-19 01:02 PM Just keeping the art alive at this point 05-May-19 10:44 PM Nice!! Always very much respected people doing that. I have yet to play around with tubes and their circuits, but I need to get around to it someday. I am focusing on like... 20 things atm though so yeaaa... I will definitely be pinging you when I have questions if you don't mind though! Awesome setup! 06-May-19 12:47 PM https://www.youtube.com/watch?v=F9Q9tPFgvp0 07-May-19 10:39 AM @Charles this looks like a regular pirani gauge 07-May-19 10:43 AM It is not as far as I can tell. There is some kind of field coil inside of it. 07-May-19 10:45 AM piranis have a Temperature compensation inside, which is just a piece of resistor wire wound 07-May-19 10:47 AM Understood. The ones we used to make had wound elements within the evacuated chamber itself that regulated the temperature. Never the less does somebody have a data sheet? 07-May-19 10:47 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/image0-E776F.jpg 10-May-19 05:59 AM yummy espresso, MMmm 10-May-19 12:25 PM fcksht 10-May-19 12:25 PM my PCs watercooling just died 10-May-19 12:25 PM the pump is dead, and it's an AIO cooler so no swapping parts for repair 10-May-19 12:26 PM I knocked over the waste solvent bucket today at school 10-May-19 12:26 PM that's almost as bad 10-May-19 12:27 PM the only reasonable store here only has a NOCTUA NH-D15S in stock, any opinions on that? 10-May-19 12:27 PM really just acetone, heptanes, and denatured alcohol.. plus grime it all picked up 10-May-19 12:27 PM I was looking at a noctua for this box for a while, iirc 10-May-19 12:27 PM @Noxz you almost kicked the bucket? 10-May-19 12:27 PM but the one I wanted was simply never stocekd so I have always been on air cooling 10-May-19 12:27 PM hah, the vacuum hose knocked over the filling spigot/funnel and tipped the FULL bottle over, luckily I caught it before too much spilled 10-May-19 12:27 PM but that was the end of the day for me, considering it took more than 30mins to cleanup 10-May-19 12:27 PM why it is in the polishing room is beyond me 10-May-19 12:27 PM maybe because there are sinks in there 10-May-19 12:27 PM and fume hood 10-May-19 12:29 PM must have been a lot of fun with all of those solvent vapors in the air 10-May-19 12:30 PM the fumehoodw as actively going, and I had a respirator on 10-May-19 12:30 PM ah, the bucket was in a fumehood? 10-May-19 12:30 PM because polishing compounds smell and have fine particles 10-May-19 12:30 PM the room has like a 4 meter long exhaust hood 10-May-19 12:30 PM above the polishing wall (4 double ended motors) 10-May-19 12:30 PM other side has a case warmer, steamer (the thing is awesome) sink, and 2x ultrasonic baths 10-May-19 12:30 PM anywho... time for friday afternoon hike with doggo 10-May-19 12:32 PM have fun ^^ 10-May-19 12:36 PM Water cooling, even AIOs are generally not worth the money... 10-May-19 12:36 PM https://www.youtube.com/watch?v=23vjWtUpItk 10-May-19 12:36 PM Apparently anyway 10-May-19 12:36 PM Testing shows, its kinda eh... 10-May-19 12:39 PM heh, I got that cooler like 5 years ago, did well until two hours ago 10-May-19 12:40 PM But the explosions! https://v.redd.it/3r157x48fhc11 10-May-19 12:40 PM I mean as in the thermal comparisons are... not worth the price... like the air cooler actually does better in most cases lmao 10-May-19 12:41 PM yep 10-May-19 12:41 PM the new one is going to be ait cooled 10-May-19 12:41 PM simply due to repairability 10-May-19 01:21 PM Seems to me like heat pipes and big exchange area are still the more practical solution. 10-May-19 01:21 PM As for vacuum pumps and chambers though I just upgraded my shop to one of those Chinese refrigerator type circulators. Best $400 I ever spent. 10-May-19 01:21 PM Also I can run a liquid cooled rig torch and laser off of it too. 10-May-19 02:22 PM nice hike 11-May-19 06:01 AM woohoo, my PC's back up and running 11-May-19 11:03 AM yay 11-May-19 11:19 AM with better temps than before 13-May-19 04:33 AM moin 13-May-19 09:25 AM Gat damn I love getting LDS vac orders 36 hours after I place them 13-May-19 04:10 PM :P 13-May-19 04:59 PM I have to pay for that privilege... 13-May-19 08:09 PM I mean, I would have picked up my order in under an hour if I wasn't out of town at the time 13-May-19 08:09 PM Adam I love you man, I'm really happy to be getting better at vacuums every day 14-May-19 12:09 AM "better at vacuums every day" \o/ 14-May-19 08:49 AM Anybody ever use one of these? https://www.ldsvacuumshopper.com/pslcdpigat1.html 14-May-19 08:49 AM We got one and it came with no wires, and I'm about to DIY a power connector unless someone tells me I'm an idiot 14-May-19 09:06 AM ehehe 14-May-19 09:14 AM Uh oh 14-May-19 09:18 AM @tokyodrip that's a fairly typical gauge. I have a similar one. Standard connector would be easy to wire up yourself 14-May-19 09:24 AM Any circuit designs handy for interfacing with it? 14-May-19 09:24 AM To aid in data collection or system control? 14-May-19 09:24 AM Or Arduino code 14-May-19 09:32 AM It depends on the gauge, each one is different. Mine is an HPT-100, uses a specific command structure over rs845. You would need to look at the datasheet specifically for yours to see. 14-May-19 09:32 AM For data collection I use an arduino mega with a custom MegunoLink interface I made which works excellently for what I need 14-May-19 09:37 AM Dope on a rope 14-May-19 09:46 AM We just have an Edwards RV8 pump so I don't know how much we can really control, but data logging would probably help out the researchers 14-May-19 11:40 AM That looks handy because it bridges the gap between a standard thermocouple gauge and the bottom of the -4 scale and that’s where you can have difficulty tracking down real vs virtual leaks and you can wind up killing ion gauges and cold cathode gauges are kind of annoying in that range cause you will wind up having to clean them a lot using them up there especially if you are leak testing with hydrocarbon fluid. 14-May-19 11:40 AM Or gas 14-May-19 11:40 AM I don’t know if I would pay that much for one new though. Perhaps pick one up second hand 14-May-19 12:57 PM It's pretty cheap as far as the gauge selection on that site goes 14-May-19 12:58 PM Pirani gauges are pretty hard to kill, definitely cheaper better options 14-May-19 12:58 PM I know many of us use an MKS 901p, which are about 50~ bucks a pop on ePay 14-May-19 12:58 PM they are decent gauges, RS-232 if you get the right model, check that, has docs with pinouts and how to talk to it 14-May-19 12:58 PM and they have free, albeit really really bad software with rudimentary logging, so you can just read it and use it out of the box with a USB to RS-232 adapter 14-May-19 01:13 PM Are all of them both serial and analog output? I may buy a couple. Also looks like they have DE15 connector on them. 14-May-19 01:14 PM yea the DE15 should be the RS232 one 14-May-19 01:14 PM and yes its has RS-232 and analog, along with some relay outputs for setpoints 14-May-19 01:14 PM they are pretty nice if you can get your head around the serial communications 14-May-19 01:14 PM go look at the docs for them and decide if you like it though 14-May-19 08:43 PM I would probably just hook up an analog panel meter. 14-May-19 08:43 PM Good enough for my use 15-May-19 07:27 AM moin 15-May-19 07:27 AM Moin ^^ 15-May-19 07:28 AM Moin 15-May-19 07:28 AM Y'all 15-May-19 07:28 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20190514_225522-D7B00.jpg 15-May-19 07:30 AM looks like fun 15-May-19 07:30 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20190515_163036-6DF2B.jpg 15-May-19 07:30 AM This is just the NT installer 15-May-19 07:31 AM real fun times! 15-May-19 07:31 AM ha 15-May-19 07:31 AM Looks like you are having fun as well 15-May-19 07:32 AM yep... 15-May-19 07:32 AM @Conmega you're in Germany! 15-May-19 07:32 AM I hope he likes maths 15-May-19 07:32 AM 'cause he'll be here for a while 15-May-19 11:13 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20190515_133916576_HDR-14C1F.jpg 15-May-19 11:13 AM Are we doing shots from workspaces today? 15-May-19 01:41 PM Here's mine: got trigger-happy at a local auction and wound up with 23 water baths and recirculating chillers. 15-May-19 01:41 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_1836-78E3D.JPG 15-May-19 01:41 PM Trigger happy is one way to put it 15-May-19 01:43 PM Well I did double my money by just selling one of them. Two of the water chillers are about 100lbs each and my body did not like me carrying them down to the basement. 15-May-19 01:44 PM Thats always fun to do 15-May-19 01:44 PM I have been through 4 different versions of NT and a few dos disks just to get this damn thing to boot 15-May-19 01:44 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20190515_164500-584EF.jpg 15-May-19 01:46 PM Obligatory shot with Vacuum Hackers open on the computer... 15-May-19 01:46 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_1837-D86C7.JPG 15-May-19 01:46 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20190515_164630-6F731.jpg 15-May-19 01:48 PM @AdamMcCombs , were you even alive when NT 4 came out? 15-May-19 01:48 PM no 15-May-19 01:48 PM This microscope is older than me 15-May-19 01:48 PM As are most that I work on 15-May-19 01:48 PM Well not any more 15-May-19 01:48 PM but it used to be everything was pretty much 70's and 80's. 15-May-19 01:50 PM The red/brown carpet in my basement from the 70's is older than me at least. Maybe I'm the only person with an SEM in a 70's era carpeted basement? 15-May-19 01:50 PM Mmmm i basement with carpet from the 70s, barely. 15-May-19 01:50 PM Any one of those on its own no 15-May-19 01:50 PM I know of 2 in living rooms 15-May-19 01:50 PM a few basements 15-May-19 01:51 PM My fiance is pretty understanding/forgiving of me, but I think she would draw the line at an SEM in the living room. 15-May-19 01:51 PM These are not just table top units either... 15-May-19 01:52 PM By the way, I finally tested out low vac mode on my Neoscope and it works. Still blurry though. 15-May-19 01:52 PM Yeah we need to get you a clean column 15-May-19 01:52 PM I should be back in town in a week and a half or so 15-May-19 01:52 PM I have been traveling for almost a month and a half straight 15-May-19 01:53 PM That's rough! 15-May-19 01:54 PM Yeah it might not be over yet either... 15-May-19 01:55 PM business must be good at least 15-May-19 01:55 PM Its going well 15-May-19 01:55 PM I think I have work on something like 8 different systems in the time span? 15-May-19 01:55 PM Only 2 have been the same model as well 15-May-19 01:57 PM Have you ever worked on Philips XL30? 15-May-19 01:57 PM Sitting in front of one right now 15-May-19 01:57 PM That's what it looked like 15-May-19 01:57 PM I like them 15-May-19 01:58 PM Equipnet has an XL30 ESEM listed for like $15k, which seems like not a terrible price for an ESEM 15-May-19 01:59 PM No its not. 15-May-19 01:59 PM Oh thats an esem feg 15-May-19 01:59 PM Philips fegs are hard 15-May-19 01:59 PM The emitters are like 6k 15-May-19 02:00 PM Yikes 15-May-19 02:00 PM And are really, really hard to fab due to the zirconium 15-May-19 02:00 PM If it was cold FEG that would just be a challenge 15-May-19 02:00 PM The zirc stuff though is going to take a lot more tooling to make happen. It should be doable though. 15-May-19 02:02 PM I should probably get my first SEM working before I start lusting after another one... 15-May-19 02:02 PM Nah 15-May-19 02:02 PM Go big or go home 15-May-19 02:02 PM Get a 12 inch wafer sem 15-May-19 02:02 PM its only 17,000lbs 15-May-19 02:02 PM Easy to carry downstairs after dealing with the baths. 15-May-19 02:03 PM Probably cheap too! 15-May-19 02:03 PM Oh yeah 15-May-19 02:03 PM I'll just explain to the boss lady that it was a really good deal 15-May-19 02:03 PM only about 1.5 mil 15-May-19 02:10 PM I should get my first SEM working too... 15-May-19 02:11 PM Where are you at with the DPs? 15-May-19 02:11 PM Hopefully mounted by the end of Saturday 15-May-19 02:12 PM Nice. You are not doing the cascaded dp right? 15-May-19 02:15 PM I don't think so 15-May-19 02:15 PM Because no mount points 15-May-19 02:16 PM Yeah for a 35c it probably wont mater that much 15-May-19 02:16 PM It would be nice for the low contamination but 15-May-19 02:17 PM I'll tape a filter from the AC to the top of the pump 15-May-19 02:17 PM Its also a 35C so thats going to be the least of your problems 15-May-19 02:17 PM That'll take care of that 15-May-19 02:17 PM yeah that how baffles work 15-May-19 03:28 PM God a 12" wafer SEM, could only imagine. I mean my piddly little thing can do up to like what 3-4 inch wafers... 15-May-19 03:29 PM *that can tilt the wafer at 70 degre angles and do simultaneous SEM and FIB 15-May-19 03:29 PM at sub nm resolution 15-May-19 03:29 PM yea I was figuring 15-May-19 04:51 PM My FIB canonly do 8 inch wafers :( 15-May-19 04:51 PM I'm a full 50% less cool 15-May-19 04:51 PM Or is it only 33% less? 15-May-19 05:14 PM It's not the size of the wafer that matters, it's what you do with it. 18-May-19 01:46 PM So say we're cleaning an oil diffusion pump 18-May-19 01:46 PM And we found a copper Christmas tree in the bottom 18-May-19 01:46 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20190518_164500248-52FFE.jpg 18-May-19 01:46 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20190518_164511638-33E2F.jpg 18-May-19 01:46 PM What could it be, and where might it go? 18-May-19 01:46 PM In a JEOL DP-4E 18-May-19 02:21 PM Perhaps we've solved this mysetery 18-May-19 09:43 PM Hahahaha. That is a baffle. 18-May-19 09:43 PM An outlet one would be my guess. It also could have dropped in from something else 18-May-19 09:43 PM What kind of oil are you using? 18-May-19 09:53 PM Oh yeah that's the output baffel 19-May-19 10:37 AM Looks like one of the baffle bits broke off. Are we safe brazing it back on? 19-May-19 10:37 AM Our endoscope helped us spot it 19-May-19 10:37 AM We removed it from the outlet tube with some effort 19-May-19 10:37 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/image_from_ios-098CC.jpg 19-May-19 10:37 AM It was definitely deformed on insertion to stick it in there 19-May-19 10:37 AM Also, that's @da3v in the pictures 19-May-19 12:10 PM You sure it came off? 19-May-19 12:10 PM The one you are holding looks complet 19-May-19 01:05 PM It's more matching copper in the same shape and was wedged in where it goes 19-May-19 01:05 PM And there's brazing marks on the tree where it looks like another branch used to be 19-May-19 01:05 PM The tree has about an inch and a quarter of empty copper "trunk" at the bottom 19-May-19 01:05 PM Hidden by Dave's fingers in those pics 19-May-19 04:38 PM Ok yeah missing a few then... 19-May-19 04:38 PM Some reference if you need it 19-May-19 04:38 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20180306_210620-84B66.jpg 19-May-19 04:38 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20180306_210538-BBB17.jpg 19-May-19 05:55 PM Oh that sits super high 19-May-19 05:55 PM Thanks 19-May-19 05:55 PM Ours was wedged way down in there 19-May-19 05:55 PM Only visible with endoscope 19-May-19 06:23 PM They just sit in there. They are not brazed. They are intentionally removable 19-May-19 06:23 PM And they are supposed to be right at the outlet 19-May-19 06:25 PM are they baffels? 19-May-19 06:25 PM ie a muffler 19-May-19 06:25 PM Generally the only things that break in diffusion pumps apart from seals and joints are whatever centers the jet in the body be it little posts or clips 19-May-19 06:25 PM And that is usually from people trying to pry them out when they get gunked up 19-May-19 07:11 PM They call it fpt and mpt 19-May-19 09:44 PM The copper bits fell apart 19-May-19 09:44 PM We were thinking of brazing them to reassemble the tree baffle 19-May-19 09:44 PM Then yes, I'll just drop it in 20-May-19 09:12 AM How hot does the DP pump oil get? I'm looking for what technique to use to fix this baffle 20-May-19 09:27 AM ~200°C for most Si oils iirc 20-May-19 09:41 AM Dope 20-May-19 10:19 AM You can silver solder or soft or hard braze it. Silver solder was our go to. 20-May-19 10:20 AM I've got silver solder. Hot damn thank you 20-May-19 10:20 AM Was leaning towards hot glue 20-May-19 10:06 PM moin 21-May-19 07:41 AM Aye 22-May-19 12:16 AM yo 22-May-19 12:16 AM what is-a up-a 22-May-19 04:48 AM Well, this finally happened. The fusor forum is unuseable and twitter is too volatile, so I went ahead and made my own website: https://t.co/XZ0E2aBnrp There's not much on there yet, but content will follow as time progresses. 22-May-19 09:12 AM My NW25 to Pine connection leaks like a seive 22-May-19 09:12 AM Any suggestions? 22-May-19 09:12 AM I can post pics in a little bit if it would help 22-May-19 10:24 AM @GigaSquirrel fusor.net looks up to me... 22-May-19 10:25 AM the site itself works fine 22-May-19 10:25 AM but the community doesn't 22-May-19 10:40 AM ehehehe 22-May-19 10:40 AM u say too many of those "i am haz teh experieced 1000 years" @GigaSquirrel 22-May-19 10:40 AM ? 22-May-19 10:42 AM way too many 22-May-19 10:42 AM combined with the 12 year olds 22-May-19 10:43 AM yeah like amateur radio communities etc 22-May-19 10:43 AM never looked into those 22-May-19 10:43 AM or amateur astronomers 22-May-19 10:43 AM luckily it would seem 22-May-19 10:44 AM it all the same from a socio-psychological point of view 22-May-19 10:45 AM i mean you're student of physics, so you're more like a pro 22-May-19 10:45 AM I've talked to lots of experts 22-May-19 10:45 AM and most of them dislike the forum 22-May-19 10:46 AM of course you make trouble in frumby hobbyists forums 22-May-19 10:47 AM maybe I just am a troublemaker ¯\_(ツ)_/¯ 22-May-19 10:47 AM they simply want the feel of knowing something 22-May-19 10:47 AM yep you are i guess 22-May-19 10:47 AM but thats ok i believe 22-May-19 10:48 AM the only positive reinforcement I've seen there was "Congrats, you now are in the neutron club" 22-May-19 10:48 AM no further interest in anything 22-May-19 10:48 AM no real science without messes and big trouble 22-May-19 10:49 AM and I think the fusor forum is drifting away from science to following ikea instructions on how to build a fusor 22-May-19 10:51 AM in their perception you degrade their achievements with your more sophisticated ones 22-May-19 10:51 AM ugh 22-May-19 10:53 AM normal 22-May-19 10:53 AM we are different! ️ 22-May-19 10:53 AM even within the misfits being outcast 22-May-19 10:56 AM ❤ 22-May-19 10:56 AM and so I decided to leave the forum alone 22-May-19 10:57 AM ehehe yeah 22-May-19 11:01 AM and hence my own website 22-May-19 11:04 AM better more time in projects 22-May-19 11:04 AM or make an yt channel if you feel the urge to explain stuff 22-May-19 11:04 AM imho 22-May-19 11:05 AM that'll happen some time 22-May-19 11:05 AM maybe 22-May-19 11:05 AM would be awesome 22-May-19 11:06 AM well I have one already 22-May-19 11:06 AM I just don't upload regularly or even edited in any way 22-May-19 11:06 AM https://www.youtube.com/channel/UCAUcCdWwuHos-DMQWMC3nhg?view_as=subscriber 22-May-19 12:08 PM https://xkcd.com/927/ 22-May-19 12:08 PM I just don't value fragmentation of information storage 22-May-19 12:08 PM If the community isnt what you want, why do you think another fresh website with 0 users would be any better? 22-May-19 12:08 PM If you have people to invite to your site, why not just invite them to fusor.net? 22-May-19 01:25 PM Leaky joint: 22-May-19 01:25 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20190522_121200279-2C7DF.jpg 22-May-19 01:31 PM a good old KF to wood adapter 22-May-19 01:45 PM @nmz787 the issue with the forums, which I have also written quite a bit about as well here, is that they have become very stagnant for a long time now. No innovation, no trying anything new. The older generation refusing to try, the younger ones in it for the quick fame. Just neutron club and out. Or running the same silver activation over and over again. One of the reasons I started my whole website and effort was because the forums were not nearly intensive enough, nor did any try to go beyond what was already done. I personally needed more of a challenge, as well as a way to showcase and organize the resources I have created and gathered, which gets into much more rigorous and formal engineering design. There is also just too much now to post there, and would get lost amongst the general noise. The forums are good resources for the basics, but not much more if you want to really push into new and more advanced territory. @GigaSquirrel I've said this already, but I fully support your new initiative to start your own website to organize and share your work. I know you have a lot of ideas and things you can do to advance diy neutron sciences. I encourage anyone to get out there and start their own website, even if it's just to organize projects or make a portfolio. I have gained more knowledge than I can state from coming across all these amazing small diy and hobbyist sites who have taken time to share their work and projects. It also becomes more accessible to a wider audience and other fields, rather than just one tiny subset. I've already gotten emails from people ranging from students to professionals, talking about everything from thermocouples to fusion. 22-May-19 01:48 PM thanks for all the encouragement! 22-May-19 01:48 PM Now we just have to convince you to put up a paypal, patreon etc 22-May-19 01:52 PM I'll put something up lol, though the timing right now makes it tough for at least a few months. You will all know shortly within the next week, but I don't want to set something up just yet since keeping up will be a bit difficult for the short term. 22-May-19 01:53 PM just please don't let it be patreon only 22-May-19 01:53 PM because you need a credit card to register and I don't have one 22-May-19 01:57 PM I don't know the best way to do it yet lol 22-May-19 01:59 PM I just went ahead and got myself a paypal.me link ¯\_(ツ)_/¯ 22-May-19 02:04 PM @Applied_Ion your own website risks getting lost to google pagerank though 22-May-19 02:09 PM Yeah it won't do as well as the fusor forums, but I just have too much I need to post and organize. Way too much documentation and data that goes outside the scope of the forums. Besides, I'm actively promoting content, linking, sharing, networking, SEO, etc. It takes a long time, but it will get more visible to natural traffic. But first and foremost I need a way personally to organize it better. The forums just isn't the place to do it at this stage, especially if I expand more into something like a startup down the road 22-May-19 02:11 PM it won't do as well as the fusor forum but at least there won't be any children, grumpy men or plain dumb people 22-May-19 03:24 PM @GigaSquirrel yes I am expert in wood working and vacuum how can I help 22-May-19 03:24 PM I gotta try and lathe a copper KF, just for the hell of it 22-May-19 03:25 PM This was the NW25 to Pine connection I mentioned this morning and no one bit 22-May-19 03:26 PM I guess I was not awake enough 22-May-19 03:26 PM Is okay 22-May-19 03:26 PM Dumb joke 22-May-19 03:26 PM Just testing to make sure my tools all worked before I went to drill the real hole 22-May-19 03:28 PM that's probably not a bad Idea 22-May-19 03:29 PM Hole drilled right and then I buried it under liquid gasket 22-May-19 03:30 PM what's liquid gasket? 22-May-19 03:30 PM that blue silcone stuff? 22-May-19 03:37 PM Eyyup 22-May-19 03:37 PM It worked at e2 torr 22-May-19 03:37 PM We'll see about e-2 torr tomorrow 22-May-19 03:38 PM from the auction site in #swap-meet ... i know it's a cover-your-butt clause, but it's amusing to me nonetheless. vacuum pumps! free phosgene-loaded oil! :D 22-May-19 03:38 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/Screen_Shot_2019-05-22_at_3.36.08_PM-C4218.png 22-May-19 03:39 PM fun times! 22-May-19 03:39 PM well, I gotta go to sleep 22-May-19 03:39 PM good luck with that seal @tokyodrip 22-May-19 03:40 PM Thanks. I'll need it 23-May-19 09:30 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20190523_123015117-82267.jpg 23-May-19 09:30 AM I put a filter on this pump but it's still outputting fog 23-May-19 09:30 AM Is this bad 23-May-19 09:30 AM And should I be not breathing the fog 23-May-19 09:50 AM dang no that filter should not be doing that... it does actually have filter material inside of it right? 23-May-19 09:50 AM I see thats only an RV3/5 that filter should be plenty good rated for it 23-May-19 09:50 AM that vapor will just be oil/water vapor... don't breath it, but it will also coat everything you own in oil if you don't get some kind of filtering on it, or venting, you can also just attach a tube to it and vent it outside... 23-May-19 10:34 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20190523_133411495-AC60C.jpg 23-May-19 10:34 AM Yeah it's just this white thing 23-May-19 10:45 AM yea that should be fine... did the mist stop after initial power up or does it continuously mist? 23-May-19 10:45 AM it could be initial vapor load, especially if its new pump oil or something 23-May-19 10:46 AM Brand new oil 23-May-19 10:46 AM hint, turn off the lights while its running and shine a bright light over the outlet if your not seeing mist but expect stuff to be coming out 23-May-19 10:46 AM cool, yea power it up, seal it off and let it pump down, and check it for any more output if it looks to die down 23-May-19 10:46 AM Fog slows way down at 1 torr, when the system stops being productive 23-May-19 10:47 AM hrm I'd expect maybe an initial blowoff on initial load then almost nothing... thats weird 23-May-19 10:47 AM I've never used that style filter before though so it may be they aren't really big enough 23-May-19 10:47 AM but they should be good up to like 5 CFM I thought, maybe even 10... which is enough for even larger pumps 23-May-19 11:07 AM We've only run pump for maybe thirty minutes 23-May-19 11:07 AM Still a slight whisper at 1 torr internal 23-May-19 11:07 AM The initial pumpdown each time has more fog 23-May-19 11:07 AM Oh btw, we keep sending it down to single Torr and back up to atm 23-May-19 11:07 AM Would that be bad for reducing this fog? 23-May-19 11:09 AM you'll want to run it at full open ballest pumped down for awhile to deal with driving off the vapor from the pump 23-May-19 11:09 AM let the pump warm up and such 23-May-19 11:09 AM but the filter shouldn't be doing it then even 23-May-19 11:09 AM its just when you first kick the pump on there will be a MASSIVE pressure change on the outlet 23-May-19 11:09 AM like if you taped something down it'll likely blow off type pressure change... 23-May-19 11:09 AM ask me how I know 23-May-19 11:10 AM It did 23-May-19 11:10 AM We plugged filter with paper towels 23-May-19 11:10 AM FOOMP 23-May-19 11:10 AM Shot up 23-May-19 11:11 AM yea paper towels and such won't do much to filter 23-May-19 11:11 AM I'd really recommend getting an edwards EMF5/10/20 but they are expensive 23-May-19 11:11 AM just the new filters for them are 90 bucks a pop for the 10 anyway 23-May-19 11:11 AM so I can understand the cringe of the price 23-May-19 11:11 AM I have never tried those small ones though and now with your experience I may be weary to 23-May-19 11:12 AM We can afford that 23-May-19 11:12 AM It's an Edwards RV8 pump 23-May-19 11:13 AM ah ok, fair enough, that is a bit larger of a pump than I thought 23-May-19 11:13 AM yea I'd go for an EMF10 23-May-19 11:13 AM there is a guy on ePay selling used ones atm that will need a cleanout and a new filter 23-May-19 11:13 AM but you can also get the filter kits off eBay for 90 bucks 23-May-19 11:13 AM well this one is all ready to go but a bit pricy... can probably save 100-150 bucks if you wait for a cheaper used filter 23-May-19 11:13 AM https://www.ebay.com/itm/New-Edwards-KF25-Ports-Designed-EMF10-Oil-Mist-Exhaust-Filter-for-Edwards/122401253162 23-May-19 11:13 AM erm just noticed its out of china... I'd scratch that I guess 23-May-19 11:13 AM I can't find the listings I used to see. They may have sold out 23-May-19 11:19 AM What is the word for some part that I could bolt against an open hole in the chamber to connect NW25 23-May-19 11:19 AM Like I have an acrylic baseplate to a bell jar 23-May-19 11:19 AM How do I add an NW25 to that as vacuumedly as possible 23-May-19 11:19 AM We might just throw money at a fancy four port SMA feedthrough 23-May-19 11:19 AM And if we do that we might as well throw money at a good connector 23-May-19 11:29 AM Do I drill a hole and drop one of these in? 23-May-19 11:29 AM https://www.ldsvacuumshopper.com/leakdettespo.html 23-May-19 11:29 AM Or is NPT fitting with lots of grease and gasket good? 23-May-19 11:29 AM I think my homemade feedthrough with off the shelf SMA and stranded wiring is the cause of my system leveling off at 1.5Torr 23-May-19 11:29 AM It worked before they asked me to achieve 50mTorr, but its time has passed 23-May-19 11:54 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/photo_2019-05-23_20-45-15-C00E6.jpg 23-May-19 11:54 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/photo_2019-05-23_20-45-14-85DF5.jpg 23-May-19 12:07 PM Delicious 23-May-19 12:50 PM LDS guy said "try throttling how fast you expose pump to chamber, maybe clamp a second filter on to the first, maybe try a dry pump for $8000" 23-May-19 12:50 PM Are oil pumps not for office use? 23-May-19 12:50 PM That question seems silly and obvious now that I ask it 23-May-19 01:21 PM uhm they are used in SEM labs all the time, its fine so long as you have good filtering 23-May-19 01:21 PM better if you have good filtering then also vent it outside 23-May-19 02:29 PM Well I ordered a second filter 23-May-19 02:29 PM And we'll Daisy chain them or stick them both on a T 23-May-19 02:29 PM /shrg 23-May-19 03:39 PM pretty off topic, but I got a plane ticket for my honeymoon in September. Going to Italy, Switzerland, and Germany! My first trip to Europe. I'm hoping to come back with some sort of cool equipment/tools/gear 23-May-19 08:13 PM hey, congrats on that c: 23-May-19 08:13 PM sounds like an adventure for sure 24-May-19 01:07 AM when you're in germany we can go to the scrapyard together, making it the best honymoon ever! 24-May-19 08:34 AM How do y'all feel about KW based feedthroughs? We're redesigning the chamber to go all off the shelf products with one penetration into the chamber, and I'm thinking about a 6 way KW tee hanging off the bottom of the chamber and running cables through accuglassproducts ports 24-May-19 08:54 AM I really wish we didn't have to put a water probing station under vacuum. 24-May-19 08:54 AM Because it's just a big friggin piece of machinery that I wish I could fit into those lil steel vacuum chambers I keep seeing in promotional catalog covers 24-May-19 09:11 AM KF feedthroughs? 24-May-19 09:11 AM I mean if the feedthrough is rated to be good for certain vacuum applications your limitation should only be the orings used in the KF application which if you use the right orings and vacuum grease and such you can achieve quite a good vacuum still... I mean whats your target pressure? 24-May-19 09:12 AM 50mTorr 24-May-19 09:12 AM Should be easy if we just buy the right parts 24-May-19 09:12 AM Diy worked when my target was 100 Torr. I achieved that and they said shoot for 50mTorr. 24-May-19 09:14 AM so only 5x10-2?? 24-May-19 09:14 AM Yea 24-May-19 09:14 AM I mean you should be-able to achieve that with literal chewing gum lol 24-May-19 09:14 AM Looking at https://www.accuglassproducts.com/sma-gs3-k40 24-May-19 09:14 AM you'll be 100% fine with KF 24-May-19 09:14 AM KF with good viton orings should get you to like 1x10-6 ultimate if your not building an entire chamber with tons of viton like iso/kf/etc for everything 24-May-19 09:14 AM and even then... I mean... 24-May-19 09:14 AM you should be FINE 24-May-19 09:15 AM Well our chamber with that sheathed wire, epoxy filled feedthrough, slathered with bluegoo... It's not beating 1.3Torr 24-May-19 09:15 AM what type of epoxy did you use? I mean there us vacuum rated epoxy 24-May-19 09:15 AM So buying a real feedthrough should take care of that 24-May-19 09:15 AM its expensive but what you should use 24-May-19 09:15 AM also I assume the wire your using in the chamber is uncovered or only insulated with like ceramic/etc 24-May-19 09:16 AM Uh... This chat mentioned any epoxy should be fine, so I just grabbed some stuff on amazon 24-May-19 09:16 AM otherwise you'll be getting tons of outgassing from the wire coating/etc 24-May-19 09:16 AM But I'm also using sheathed stranded wires in the feedthrough, and have been told by many that that would be a failure point 24-May-19 09:17 AM I suppose for your pressures any epoxy is probably alright 24-May-19 09:17 AM ah yea... those cables will outgass like crazy 24-May-19 09:17 AM Nah, I grabbed stranded wires from the workbench, and used some spare SMA cars we had 24-May-19 09:17 AM Lol 24-May-19 09:17 AM also 1.3 Torr on a good RV8 pump sounds like a major leak 24-May-19 09:17 AM I mean I have a chamber with conflat/ISO/KF tons of viton orings 24-May-19 09:18 AM Well blanking off the plumbing from chamber we hit 2mTorr in like, a minute 24-May-19 09:18 AM and I can still get to like 1x10-4 24-May-19 09:18 AM So it's the chamber 24-May-19 09:18 AM thats with a leak and using a small turbo pump 24-May-19 09:18 AM without a turbo I still easly get down to quite low 24-May-19 09:19 AM And the chamber is an acrylic plate with the NPT fitting to NW, my feedthrough, and the greasy oring of the bell jar, and we've tested with two belljars and hit the same 1.3Torr plateau 24-May-19 09:19 AM acrylic... hrm... 24-May-19 09:19 AM not sure how good that is for vacuum work? 24-May-19 09:19 AM I know most people for belljars do an aluminum plate as the base 24-May-19 09:19 AM like half inch to inch thick 24-May-19 09:19 AM Uh oh 24-May-19 09:20 AM then just drill and tap that 24-May-19 09:20 AM can you guys handle working with aluminum there? 24-May-19 09:20 AM if you have like a drill press and such I assume you'd be fine 24-May-19 09:20 AM Yeah kinda 24-May-19 09:20 AM Maybe time to upgrade from harbor freight it we do that 24-May-19 09:20 AM Or get a shop nearby to make it 24-May-19 09:20 AM I mean you've seen Applied Science's belljar chamber right? 24-May-19 09:21 AM Yea 24-May-19 09:21 AM Well how much could a half inch thick plate of aluminum that's 20 inch square cost? /s 24-May-19 09:22 AM yea it appears acrylic is just not good enough for your application 24-May-19 09:22 AM unless you want to deal with super long pumping times 24-May-19 09:22 AM https://www.sanatron.com/articles/vacuum-levels-of-acrylic-vacuum-chambers.php 24-May-19 09:22 AM We've got an acrylic bell jar too 24-May-19 09:22 AM Well 24-May-19 09:22 AM I think this problem just exceeded the scope of the email I was writing 24-May-19 09:23 AM ah... yea 24-May-19 09:23 AM What are you trying to do in the chamber? 24-May-19 09:24 AM Stick a wafer probing station 24-May-19 09:24 AM It's like a 15 inch square thanks to the knobs 24-May-19 09:24 AM Trying to probe and test wafer materials in a vacuum because reasons and science 24-May-19 09:24 AM And I'm a computer engineering undergrad tasked with designing a vacuum chamber 24-May-19 09:26 AM Ah ok, hrm, so your going to be having mechanical feedthroughs or is the station fully electronic? 24-May-19 09:26 AM Just electric 24-May-19 09:26 AM The goal is to set up the probes, put the bell down, pump it out, test, open chamber, move to next device on wafer.... 24-May-19 09:27 AM ah ok I see 24-May-19 09:27 AM so you don't need to visually see it? 24-May-19 09:27 AM or if you do you don't need super perfect visibility? 24-May-19 09:27 AM No, that may impact the next chamber 24-May-19 09:27 AM We could go to another chamber that would be differently designed 24-May-19 09:27 AM Yeah I gotta go talk to the team about this 24-May-19 09:27 AM Aaaaaaugh. I don't like that acrylic hits their wanted pressure after three hours of pumpdown 24-May-19 09:27 AM Lol 24-May-19 09:30 AM Man its too bad I didn't realize your needs earlier... there were some nice belljars and BIG vacuum chambers up for cheap on eBay awhile ago 24-May-19 09:30 AM I'll have to keep an eye out for you. 24-May-19 09:30 AM Also, with more pumping capacity you could compensate 24-May-19 10:06 AM Well Kurt Lesker sells the same size jar in Pyrex for $3400 24-May-19 10:06 AM This might end up just going in our class 100 cleanroom where we've got vacuum hookups. A solid general purpose vacuum chamber 24-May-19 10:06 AM It'd be nice if it stayed out of that room, but man this is a pickle 24-May-19 11:07 AM I'm looking for a oxygen monitor that I can simply bolt to the wall that will give an alarm below... at whatever point it gets dangerous 24-May-19 11:07 AM any tips? 24-May-19 11:07 AM looking for "oxygen monitor" on ebay gives me either blood oxygen or handheld oxygen meters 24-May-19 11:11 AM Are you worried about low oxygen or higher amounts of noxious gasses? 24-May-19 11:12 AM low o2 24-May-19 11:12 AM Like O2 partial pressure specifically, or just breathing 24-May-19 11:12 AM it's for a room with LN2 in it 24-May-19 11:12 AM Do they make equipment for those rooms that just detects excess N2? 24-May-19 11:13 AM I don't know, I've only ever seen oxygen meters 24-May-19 11:13 AM that just give a percentage and go in alarm at 18% or so 24-May-19 11:14 AM PVC hosing in vacuum systems. Is that the best way to electrically isolate a pump from other things? 24-May-19 11:14 AM We're trying to figure out which rf passthroughs to buy 24-May-19 11:15 AM keep in mind that stuff likes to arc over at lower pressures 24-May-19 11:15 AM Heck. 24-May-19 11:15 AM Grad student suggests we need to keep both tip and sleeve of rf isolated electrically, which adds $$$ 24-May-19 11:16 AM "tip and sleeve of rf"? 24-May-19 11:18 AM The SMA connectors for our 4+ gHz signals 24-May-19 11:18 AM Err, not tip and sleeve (I'm used to audio connectors), but the two bits of coax 24-May-19 11:18 AM Hot and shielding? 24-May-19 11:18 AM I'm real sorry I'm so dumb 24-May-19 11:22 AM signal and shield 24-May-19 11:22 AM well shield is usually on ground potential 24-May-19 11:22 AM Yeah I think we can tie the shields together on them 24-May-19 11:23 AM if you can't your circuit is very weird 24-May-19 11:23 AM you're using coax, right?` 24-May-19 11:23 AM Probing multiple points on a wafer... 24-May-19 11:23 AM The circuit is arbitrary and physicsy 24-May-19 11:24 AM well, if your signal is differential you should not use coax and if you're using coax your shield should be grounded in most cases 24-May-19 11:26 AM Yeah, we just don't want to connect it to the pump via metal 24-May-19 11:26 AM Because motor 24-May-19 11:26 AM So I guess rubber hose to pump is the way 24-May-19 11:28 AM put a metal filter at the inlet of your chamber, that way no plasma can be ignited inside the hose 24-May-19 11:30 AM Plasma? From where? 24-May-19 11:30 AM And sure 24-May-19 11:30 AM I believe you 24-May-19 11:30 AM Tell me anything about vacuums and I'll believe it 24-May-19 11:30 AM At this point the cost of this experiment is approaching $10,000 24-May-19 11:31 AM well if you need to insulate the pump I assumed you have some potential between the chamber and the pump 24-May-19 11:32 AM Just electrical noise 24-May-19 11:32 AM Everything is an antenna 24-May-19 11:32 AM and if there's a voltage and low pressure there is a good chance for plasma 24-May-19 11:32 AM ahh, yes 24-May-19 11:32 AM Oh but I see, if we isolate them they could build up a potential difference 24-May-19 11:34 AM hm 24-May-19 11:34 AM I usually star ground everything, that results in very low noise 24-May-19 11:37 AM Star ground? 24-May-19 11:38 AM you have one ground point to which everything is connected, instead of daisychaining ground 24-May-19 11:38 AM Oh okay 24-May-19 11:38 AM http://members.ozemail.com.au/~tabbler/GndRule/gndtech.gif 24-May-19 11:38 AM usually the chamber itself is the ground point 24-May-19 11:39 AM Yeah, I'm hoping we can talk the money havers into a glass and aluminum chamber 24-May-19 11:39 AM Or just a $10k aluminum chamber and we don't look inside it while it's running 24-May-19 11:40 AM hm 24-May-19 11:40 AM is it really that sensitive? 24-May-19 11:40 AM and also there's ITO coated glass that can be used as a shielding viewport 24-May-19 11:43 AM I'm told it's that sensitive 24-May-19 11:43 AM We've got passive antennas going to lil undiced wafer devices and trying to meausure differences between attenuations all around the -60dB mark 24-May-19 11:43 AM And getting data back through EM reflections 24-May-19 11:46 AM hm 24-May-19 11:46 AM well it's not an easy task 24-May-19 11:47 AM That's why there's a team of us 24-May-19 11:47 AM But I'm no RF guy, nor am I a vacuum systems guy lol 24-May-19 11:47 AM I'm just the undergrad in the group who's built the most hobby machines 24-May-19 11:53 AM We're trying to do this task because a physicist said "it should work" in a paper and no one has done it yet 24-May-19 11:53 AM And as long as we confirm that the thing has a chance of working, we succeed. 24-May-19 11:54 AM if your probe station was just a bit smaller I could probably cobble you a chamber 24-May-19 11:54 AM but 15x15 is massive 24-May-19 11:55 AM Yeah when I mentioned new jars we might look at machining new probe station parts 24-May-19 11:55 AM The biggest part is the XYZR platform that the wafer sits on. 24-May-19 12:15 PM Catching up now lol. @tokyodrip do you have cad models of what you are trying to accomplish? Also reference paper? No way should it cost 10k to get a chamber to 50 millitorr, even a larger chamber 24-May-19 12:18 PM I have a flowchart of connections made, plus each rf probe with mount is $1000 24-May-19 12:18 PM But I can post flowchart 24-May-19 12:18 PM Of plumbing 24-May-19 12:19 PM I would highly recommend your team cad out and plan your system before buying parts or building, it will save you trouble down the road. 24-May-19 12:19 PM Do you have a paper of what you are trying to reproduce? 24-May-19 12:19 PM What is the process exactly? 24-May-19 12:21 PM The devices have been made, the goal is "get isolated sma and DC connections into a 30 gallon chamber and make it 50mTorr" 24-May-19 12:23 PM What is the device exactly? I think I saw pictures of your setup somewhere, but it may be lost to the walls of text. Sealing for 50 mtorr shouldn't be difficult. 24-May-19 12:25 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/yes-C10B7.png 24-May-19 12:25 PM Device is a wafer 24-May-19 12:25 PM On a manipulator with a stage above it for probing 24-May-19 12:26 PM So have you built the chamber yet or are you in the planning phase now? 24-May-19 12:26 PM So chamber is an 18" diameter 24" tall bell jar, and bell and base are acrylic 24-May-19 12:26 PM Acrylic because I was oroginally tasked with a low vacuum chamber and am now tasked with 50mTorr 24-May-19 12:27 PM What do you use to seal between the two? 24-May-19 12:27 PM Rubber gasket and grease 24-May-19 12:27 PM O ring groove? 24-May-19 12:27 PM L shaped gasket 24-May-19 12:27 PM Smooth acrylic 24-May-19 12:28 PM Any clamping? 24-May-19 12:28 PM Is atmospheric pressure a clamp? 24-May-19 12:28 PM Not really lol 24-May-19 12:28 PM Oh 24-May-19 12:29 PM I mean it will hold vacuum to an extent, but not for deeper levels by itself 24-May-19 12:29 PM Not 50mTorr? 24-May-19 12:29 PM 18" diameter is a lot of surface area to cover 24-May-19 12:29 PM You have huge leak potential 24-May-19 12:29 PM 56 linear inches of gasket 24-May-19 12:29 PM So a glass belljar with aluminum base might not even be the answer? Because we're currently angry at acrylic on a chemical level 24-May-19 12:30 PM Also acrylic everything is bad for outgassing. Aluminum baseplates are usually standard 24-May-19 12:31 PM We also would like to expose this to atmosphere as often as possible, because we need to get in there to manipulate and reprobe... 24-May-19 12:31 PM Floating SMA feedthroughs are $800 each, and the vacuum ready RF cables are $250 each, and we need a pair, so that sucks 24-May-19 12:36 PM At your vacuum levels you should be able to make an s a feedthrough pretty easy and cheap 24-May-19 12:36 PM Tips on that? 24-May-19 12:37 PM Torr seal epoxy, or Hysol-1C generic stuff 24-May-19 12:37 PM That's been a major failure of mine, is making DC and sma feedthrough 24-May-19 12:37 PM What dc voltage? 24-May-19 12:37 PM Also tons if feedthroughs floating around ebay super cheap you can adapt or modify 24-May-19 12:37 PM Drill out an aluminum NW25 blank, add hermetic seal, use hysol1c? 24-May-19 12:37 PM 22V @ 3mA 24-May-19 12:37 PM For the dc 24-May-19 12:37 PM So... Not much 24-May-19 12:37 PM eBay is less good for us, auctions can move too fast for our finance department to move in time. 24-May-19 12:39 PM Oh, so it's not a home project? 24-May-19 12:39 PM Hello I am University research 24-May-19 12:39 PM Oh lol yeah, you guys got money but lose flexibility and creativity lol 24-May-19 12:39 PM Yep 24-May-19 12:40 PM Ueah I work at a university lab full time professionally, I know what it's like, though our lab is still pretty flexible 24-May-19 12:40 PM What pumps are you using? 24-May-19 12:41 PM Edwards RV8 24-May-19 12:41 PM Do you have any pictures or diagrams of the setup? I know cad is a no, but it helps to see what we are working with here lol (if it's allowed) 24-May-19 12:41 PM May be possible to visually spot issues as well, at least immediate areas for concern 24-May-19 12:41 PM Also what's the project for? Undergrad, thesis, class, research, club? Has anyone done any vacuum research prior to undertaking the project? 24-May-19 12:41 PM In addition, what tooling do you have access to? Machining, welding, campus machine shop, etc? 24-May-19 12:41 PM Sorry to hammer with questions, but having a solid grasp of context, overview, goals, resources, scope, etc will help in planning and cost reduction 24-May-19 12:48 PM Nah it's good. I'm on a research team and we do have outside money. We haven't built custom vacuum stuff but we do use plenty of vacuum stuff in our clean fabroom 24-May-19 12:48 PM Time > money 24-May-19 12:48 PM But at some point it'll be too much money 24-May-19 12:48 PM We have some access to machine shop stuff, and we have a drill press in our lab 24-May-19 12:48 PM I'm also a member of the local hackerspace, with lots o tools 24-May-19 12:51 PM So what does this setup accomplish? You have a wafer under rough vacuum. What do you do with the wafer? 24-May-19 12:51 PM In your diagram you have multiple baffles. A 4" and 18". Are these vacuum baffles for like diff pumps? Is that the diameter of the baffle? Also, how is your 3/4" npt attached to chamber? KF stuff is good to 10^-8 torr ideal, but npt is only roughing at best. Screwed into a plastic baseplate you may have issues. I use an npt adapter in my foreline and I had to crank it down extremely hard. 24-May-19 12:51 PM I'd say your main is issue the whole acrylic baseplate with such a wide diameter acrylic chamber and L gasket with no clamping setup. Way too much area for leaks to occur. Also you can leak check just spraying soapy water lightly around the edge. You will know if you have a gross leak when bubbles are getting drawn into your chamber lol 24-May-19 12:51 PM For reference, for my setup using a 2 stage refrigeration pump for roughing I could only get my system down to under 30 millitorr after cranking everything down as tight as possible. All kf foreline, and a 6" conflat chamber on custom aluminum plates with oring grooves for pump and baffle adapting. 24-May-19 12:51 PM An 18" all acrylic vessel with wide gasket and no clamping won't get you down that far 24-May-19 12:51 PM Now, acrylic can and is used in certain high vacuum systems, such as certain classes of intense accelerators for massive vacuum insulators. Operated at 10^-6 torr, but you need quite high pumping speeds to compensate. In this setup, a proper oring groove with full bolts clamping around the flange is required. 24-May-19 01:10 PM @tokyodrip "But I'm also using sheathed stranded wires in the feedthrough, and have been told by many that that would be a failure point" <--- What does that mean? 24-May-19 01:10 PM Like you cast a normal stranded wire in epoxy for the feedthrough?, because that's gona leak 24-May-19 01:10 PM Just cast a singlestrand wire with hysol? 24-May-19 01:10 PM hysol works a treat, we do our own 100pin feedthroughs with it at work 24-May-19 01:14 PM Yeah I grabbed wires and poured epoxy 24-May-19 01:14 PM It worked at 100Torr 24-May-19 01:14 PM It no longer works 24-May-19 01:14 PM Lol 24-May-19 01:15 PM If you are casting the jacket material in the epoxy, you will still have a leak between the wire and insulation since that is effectively a path to atmosphere 24-May-19 01:15 PM Do you have pictures of the feedthrough you made? 24-May-19 01:15 PM Lemme scroll back 24-May-19 01:15 PM It's... 24-May-19 01:15 PM Well don't judge me as a person for what you're about to see 24-May-19 01:16 PM Lol we have all made our fair share of sketchy stuff at one point or another 24-May-19 01:17 PM Heh 24-May-19 01:17 PM I'm known for my love of kapton tape and hotglue at work. 24-May-19 01:18 PM I'm known for my driving things way too high power with exposed wires and duct tape everywhere lol 24-May-19 01:18 PM Speaking of work, my contract is not getting renewed, so my vacuum adventures are gona get on hold, unless I can score some good junk from the local university. 24-May-19 01:18 PM Damn that sucks 24-May-19 01:18 PM Yay for startup lyfe and money runnign out 24-May-19 01:18 PM Yea short notice too 24-May-19 01:18 PM gona have fun times 24-May-19 01:19 PM Well this was it when I was casting it 24-May-19 01:19 PM Yeah money... can't do science without it 24-May-19 01:19 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/20190412_165521-7503C.jpg 24-May-19 01:19 PM Oh yeah that's gonna leak like no tomorrow lol 24-May-19 01:19 PM @Applied_Ion More like I can't get paid coz there's 10pcs turbos + 10pcs solenoid valves + 10pcs prepumps on the shelf 24-May-19 01:19 PM with twice that on order 24-May-19 01:19 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20190524_161948797-EAEEF.jpg 24-May-19 01:19 PM And this is it after repeated insertions and removals and coatings of liquid gasket ULTRA BLUE 24-May-19 01:20 PM @rfs all that stuff sitting around not used? 24-May-19 01:20 PM So I'm serious when I say it's time to take it out behind the barn 24-May-19 01:21 PM @tokyodrip yeah I think that feedthrough is thoroughly dead lol 24-May-19 01:21 PM Hmm, how to do coaxial feedthrough on for 4GHz on the cheap? 24-May-19 01:21 PM That's not going to seal at all 24-May-19 01:21 PM Yeah 24-May-19 01:21 PM @0xDBFB7 Can you do balanced? 24-May-19 01:21 PM for RF 24-May-19 01:21 PM It held steady at 1.3Torr 24-May-19 01:22 PM @Applied_Ion Any idea if polyimide flex pcb would leak? 24-May-19 01:22 PM Leak in what context? 24-May-19 01:22 PM coz oshpark flex with some microstrips might do for a low cost 4GHz FT 24-May-19 01:22 PM Outgas or as a seal to atmosphere? 24-May-19 01:22 PM I mean it did 1.3Torr when the pump could do 3mTorr, but it did what it did 24-May-19 01:22 PM seal to atmospehere 24-May-19 01:22 PM How low vacuum? 24-May-19 01:23 PM actually, I have seen flex based feedthroughs on some custom research gear, so can be done, but noidea about outgassing or performance 24-May-19 01:23 PM as there's potentialy and adhesive between layers 24-May-19 01:23 PM Flex pcb is perfectly usable in vacuum imo 24-May-19 01:24 PM Polyimide is fine itself under high vacuum. Depends on permeation though, and how it's layered 24-May-19 01:24 PM we get -6/-7 mTorr with tons of flex 24-May-19 01:24 PM Yeah its fine in vacuum 24-May-19 01:24 PM But feedthroughs dont use that 24-May-19 01:25 PM @Applied_Ion this is what we kludged together 24-May-19 01:25 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20190524_162426372-CDE2A.jpg 24-May-19 01:25 PM Bell jar upside down in the box with it's red gasket is what we're keeping of that pile 24-May-19 01:25 PM That blue mess was gasketing a removable feedthrough panel 24-May-19 01:26 PM @Applied_Ion All that stuff is for a large customer order + own production 24-May-19 01:26 PM re:turbos 24-May-19 01:26 PM And the panel is inside that blue lump 24-May-19 01:26 PM But the company gets paid afther delivery 24-May-19 01:27 PM @tokyodrip how is the panel attached to the baseplate? 24-May-19 01:27 PM = I dont get to continue my employment coz I'm R&D and testing 24-May-19 01:27 PM Rfs good luck with future r&d jobs 24-May-19 01:27 PM Yea 24-May-19 01:28 PM @Applied_Ion four screws held it on 24-May-19 01:28 PM @tokyodrip are you using a gasket or oring between them? 24-May-19 01:28 PM Just stressfull with bossman going "btw you are not gona have work in two weeks, btw" 24-May-19 01:28 PM @rfs sorry to hear, that's not fun 24-May-19 01:28 PM @Applied_Ion a bunch of blue instant gasket was smeared in, then we let it set, then tightened screws more 24-May-19 01:28 PM Anyway, for a decently vacuum proof RF feedthrough it might be doable with polyimide 24-May-19 01:29 PM @rfs how deep of a vacuum? 24-May-19 01:29 PM @tokyodrip yeah I could see lots of issues with that approach lol 24-May-19 01:29 PM 3layer/4layer would be best, the microstrips could be run between two groundplanes so that the cast epoxy would not mess up the impedance 24-May-19 01:29 PM @rfs we just sent up this https://www.accuglassproducts.com/sma-coaxial/floating-iso-kf-feedthroughs 24-May-19 01:29 PM but that would include glues and other stuff 24-May-19 01:30 PM With these https://www.accuglassproducts.com/coaxial-sma/connector-cable-accu-fast%E2%84%A2-620 24-May-19 01:30 PM @tokyodrip Yea that's gona work very fine 24-May-19 01:30 PM @Applied_Ion Just thinking about how the @tokyodrip application could be done on the cheap. when the current thing is SMA cables with RG316 cast in epoxy :DDD 24-May-19 01:31 PM So we'll see how much the principal investigators want to spend, and how much 50mTorr is worth for this experiment 24-May-19 01:31 PM And if 1Torr is fine 24-May-19 01:31 PM Why do you need vacuum? What's the end goal? 24-May-19 01:33 PM There's some materials being researched that absorb molecules from the air when they get warm, and we're trying to slow the rate at which they do that so we can spend a few more minutes measuring the devices before their heat starts affecting chemistries 24-May-19 01:33 PM So it's about making measurements easier and less time-crunchy 24-May-19 01:33 PM And maybe we discover new science 24-May-19 01:33 PM But mostly about just having less stuff near the wafer while it does it's disco 24-May-19 01:34 PM Does the desorbed gases from materials interfere at all with these measurements? Like volatiles from gasket materials, can that contaminate the samples? 24-May-19 01:35 PM It affects the efficiency of the SAW device, and causes excess attenuation 24-May-19 01:35 PM And we're trying to see if we can create gain, or at least attenuate less 24-May-19 01:35 PM You are going to have large gas loads at such low vacuum levels 24-May-19 01:35 PM Oh yeah, off topic but got to witness a fun bug today at work 24-May-19 01:35 PM I mean 100Torr was already a big help 24-May-19 01:35 PM We ware testing some pumpdown + cryo logic 24-May-19 01:36 PM What is the material? 24-May-19 01:36 PM ... 24-May-19 01:36 PM Things 24-May-19 01:36 PM I think that might be a "don't talk about yet" 24-May-19 01:37 PM prepump starts OK like it should, but all the diagnostics info is garbage (all fields just get 1984 or 1986 :D, so it shows turbo speed being 1984Hz, turbo current being 1984Amps, turbo temperature being 1986*C and system status being "1984". 24-May-19 01:37 PM Bahaha that's some bug 24-May-19 01:37 PM Terminal gets written "systemctrlcmd CRYO STOP" 24-May-19 01:37 PM nothing happens 24-May-19 01:37 PM Pump goes on 24-May-19 01:37 PM arrow up, enter, x5 24-May-19 01:37 PM nothing 24-May-19 01:37 PM "systemctrlcmd CRYO KILL" 24-May-19 01:37 PM nothing 24-May-19 01:37 PM :DDDDDD 24-May-19 01:37 PM arrow up, enter, x10 24-May-19 01:37 PM nothing 24-May-19 01:37 PM :DDDD 24-May-19 01:37 PM "lets just remove power and swap in another controller" 24-May-19 01:37 PM "This is the other controller" 24-May-19 01:40 PM @tokyodrip you mention SAW device, and absorbion effects on measurements, that's probably enough for me to look into literature to find out similar testing and materials lol 24-May-19 01:40 PM Yeah probably 24-May-19 01:40 PM I mean, we make sensors 24-May-19 01:40 PM Not to poke or pry lol, I know stuff can be sensitive 24-May-19 01:41 PM Oh whoops 24-May-19 01:41 PM So all the things that heck up SAW devices, we just quantify them 24-May-19 01:41 PM And boom, you got a sensor 24-May-19 01:41 PM Yay 24-May-19 01:41 PM This is some non sensor stuff, but still SAW 24-May-19 01:41 PM Sounds like that MEMS course with APLAC simulation I did at collage 24-May-19 01:41 PM It's like mems, but less motion 24-May-19 01:41 PM Really just gigahertz vibrators 24-May-19 01:41 PM @rfs what solved the Timecop 1984 errors? 24-May-19 01:43 PM No idea, still existing 24-May-19 01:43 PM when I left to get coffee bossman was reading logs and source 24-May-19 01:43 PM Insidious problem 24-May-19 01:45 PM Yeah @Applied_Ion yeah so it looks like there's lots of papers on this subject and our material is commonly researched, our goal is just to put it in a different spot/shape/layer and see if it works better 24-May-19 01:45 PM Huh, I forgot lithium tantalate and lithium niobate were SAW materials. There was a discussion on the fusor forums about pyroelectric neutron sources I needed to clear up some misunderstandings on lol, these are two major crystals used in it as well. 24-May-19 01:45 PM as there's like two MCU's in the command path + unholy software stack PC side with C++, C and Python 24-May-19 01:45 PM Why does the chamber need to be so big? 24-May-19 01:46 PM But it's using graphene with lithium nioborate 24-May-19 01:46 PM Nice 24-May-19 01:46 PM Probe station 24-May-19 01:46 PM If we have to go to a new chamber we'll be redesigning probe station to be smol 24-May-19 01:46 PM Because again, original goal was to just match the performance of a harbor freight pump and degassing pot from amazon 24-May-19 01:46 PM Lol 24-May-19 01:47 PM Why not start with those lol 24-May-19 01:47 PM Then I showed up and it's all "hey new kid, make it like, 10000 times more vacuum" 24-May-19 01:47 PM Well new chamber or existing chamber, we still need better passthroughs, so we're buying plumbing now, and if we need better chamber we'll still need the plumbing 24-May-19 01:47 PM Adding clamp points to the bell jar is something I'm floating up now though, so that's good to think about 24-May-19 01:47 PM We're working on some band clamp grips to hoist it up, we could use those to hold it down 24-May-19 01:47 PM Or yeet some cinder blocks on top of the bell 24-May-19 01:53 PM You will want even distribution of pressure around such a large diameter surface 24-May-19 01:53 PM Even then though it will be iffy in the current configuration. 24-May-19 01:56 PM Yeah 24-May-19 01:56 PM I wish this was as simple as what I originally joined vacuum hackers for, which is fixing up our JEOL 35C SEM 24-May-19 01:56 PM Now suddenly I have a day job about high vacuum succ as well 24-May-19 01:57 PM Also all that sealing material and plastic will suply a large gas load by itself 24-May-19 01:57 PM It should be simple lol, just you current configuration makes it less than ideal 24-May-19 01:59 PM By configuration do you meanthe bell jar? 24-May-19 01:59 PM Yeah lol. Big plastic jar, large sealing area, feedthrough setup, etc 24-May-19 01:59 PM My first proposal was for a 24" internal cube chamber but that was pricey 24-May-19 01:59 PM Next feedthrough will penetrate base exactly once via NPT 1", and be proper vacuum fittings everywhere else 24-May-19 01:59 PM Maybe 24-May-19 02:00 PM https://twitter.com/a7_FIN_SWE/status/1132011604848062464 24-May-19 02:00 PM Probably want to use a metal baseplate if tapping for NPT or other large feedthroughs 24-May-19 02:01 PM I've suggested. We're going to see what acrylic does first 24-May-19 02:01 PM It's going to outgas and leak lol. How thick is it? 24-May-19 02:02 PM Add a gasket and grease and see what happens 24-May-19 02:02 PM It's an inch thicc 24-May-19 02:02 PM I passed along the website @Conmega linked about acrylic and high vacuum 24-May-19 02:04 PM Like I mentioned, it can be used in certain systems, but you need high pumping speed and proper oring seals with even clamping distribution. 24-May-19 02:04 PM Problem is acrylic is hydroscopic, and until maybe 10^-7 torr your major gas load is water vapor 24-May-19 02:05 PM These are good things to know 24-May-19 02:05 PM I've done my part as undergraduate assistant 24-May-19 02:11 PM Average outgassing rate of acrylic is around 2x10^-6 torr liter/sec/cm2 at 1 hour of pumping. Baked though you can drop it to 1x10^-8 torr L/sec/cm2. More surface area, higher outgassing rates. Your RV8 pump only has a speed of about 7cfm, or 3.3 L/s, which is very small 24-May-19 02:11 PM If you know your pumping speed and pressure, you can calculate your gas load 24-May-19 02:11 PM Back calculate out the load from outgassing, you can find your leak rate 24-May-19 02:13 PM Oh woah. You can math this? 24-May-19 02:13 PM Now I gotta math it 24-May-19 02:13 PM Suddenly got fun again 24-May-19 02:14 PM So assume ideal max pump speed of 3.3 L/sec, and you know your ultimate pressure, you can calculate the load. Then back calculate outgassing rate to estimate leak 24-May-19 02:14 PM You can do more than math lol 24-May-19 02:14 PM Full simulation as well, but this is getting more complex than needed for this project lol 24-May-19 02:14 PM Hand calculations are sufficient to estimate 24-May-19 02:14 PM I hand calculated and simulated molecular flow for pumpdown for my system using a free software from CERN called Molflow+ 24-May-19 02:14 PM Vacuum engineering is just like any other engineering discipline, though it has done weird quarks to it 24-May-19 02:17 PM what water vapour? 24-May-19 02:17 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20190521_184609-11537.jpg 24-May-19 02:17 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20190521_184640-ED8F0.jpg 24-May-19 02:17 PM Different pumps too 24-May-19 02:17 PM So at 0.0197 Torr liter /sec 24-May-19 02:17 PM Lol wow 24-May-19 02:17 PM Is that a lot of Torr liter/sec? 24-May-19 02:17 PM No lol, the picture 24-May-19 02:17 PM How did you calculate your number? 24-May-19 02:18 PM @Applied_Ion Yeah that sucked. There's now a separate solenoid valve to flush the thing. 24-May-19 02:18 PM "But rfs, how much you flush it?" 24-May-19 02:19 PM Neglecting flows and other things, the basic vacuum equation is P=Q/S. P is pressure, Q is gas load, S is speed 24-May-19 02:19 PM Too little, as that's pumping afther 30minutes of flushing 24-May-19 02:19 PM Geez lol 24-May-19 02:19 PM Also 24-May-19 02:19 PM Pheiffer manuals lie :DDD 24-May-19 02:19 PM default RS485 addresses are sometimessomething different 24-May-19 02:19 PM and we have also received units with random default settings 24-May-19 02:19 PM So now one dude programs in new settings to every pump we receive 24-May-19 02:20 PM I did surface area of inside of acrylic multiplied by your 2e-6 24-May-19 02:20 PM What's your ultimate pressure? 24-May-19 02:20 PM It was easier when it was just a single pin you pulled to 24V to pump. But those got obsoleted and the new one's have RS485, so ofc folks use that coz the turbo also has RS485 24-May-19 02:21 PM And got surface area wrong, so it's actually 0.022984 Torr liter /sec 24-May-19 02:21 PM Ultimate pressure is 50mTorr 24-May-19 02:21 PM So do I need volume of chamber now? In liters? To cancel that unit? 24-May-19 02:21 PM This just got actually exciting 24-May-19 02:23 PM That's just gas load from water vapor assuming no leaks. So your total load with ideal speed of 3.3 l/s at 50 m torr is .165 torr l/sec. 24-May-19 02:23 PM So your super rough estimated leak load is about 0.14 torr l/sec. That's under ideal pumping 24-May-19 02:24 PM Oh, well the vacuum we actually hit was 1.37Torr 24-May-19 02:24 PM I thought you meant the goal vacuum 24-May-19 02:24 PM And super simplified assumptions 24-May-19 02:24 PM Oh no lol your vacuum 24-May-19 02:24 PM That probably makes it much much much less ideal 24-May-19 02:25 PM Now however you know the gas load to sustain that ideal level under ideal pumping 24-May-19 02:25 PM So the 0.022 torr liter/sec is a gas load? 24-May-19 02:26 PM Yeah so for your vacuum your total gas load is 4.521 torr l/s. That's massive lol. Since your outgassing load from acrylic is only .023, you have a substantial, massive leak lol 24-May-19 02:26 PM I see 24-May-19 02:26 PM However, that gas load you calculated is only for acrylic 24-May-19 02:27 PM OH. Pump speed times the pressure is the gas load sustained 24-May-19 02:27 PM You need to account for gas loads of every material used seperately 24-May-19 02:27 PM So that's the 4.4 tl/s 24-May-19 02:27 PM Well this is friggin neat 24-May-19 02:33 PM I have all my calculations, simulations, and walkthrough material available freely online for reference lol 24-May-19 02:33 PM Also there should be a folder of all my vacuum papers I collected in the resource area 24-May-19 02:35 PM Interesting 24-May-19 02:35 PM Well at least I can say what our problem is with numbers 24-May-19 02:35 PM Okay, actually going home now 24-May-19 02:35 PM I want to play stardew valley with wine and my cat 26-May-19 06:39 AM ive been so out of the loop, do we have a wiki now? 26-May-19 07:23 AM moi 26-May-19 09:35 PM so I've been trying to get this Varian DS-302 I bought at sunnyvale electronics flea market running 26-May-19 09:35 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/JPEG_20190526_213706-C8864.jpg 26-May-19 09:35 PM I removed the motor and successfully got it spinning (though it needed a little kick; I just replaced the start capacitor) 26-May-19 09:35 PM but when I put the motor back on, it doesn't spin now 26-May-19 09:35 PM I'm thinking that I'll try putting an electric drill on the shaft coming out the back in the hopes of running the pump long enough to flush any schmutz out of it that is increasing the torque needed by the motor 26-May-19 09:35 PM interestingly when I was rotating the shaft by hand (with the power off), I noticed some very fine white mist coming out of the outlet 26-May-19 09:35 PM the pump is full of flushing fluid right now, and I determined that I was rotating it in the right direction when that happened 27-May-19 12:29 AM moi 27-May-19 12:29 AM @taktoa Are you using flushing fluid? Also if its that bad its probably going to need a rebuild.... 27-May-19 12:36 AM happy flushin 27-May-19 12:45 AM what is goink on 27-May-19 01:13 AM more moving of the workshop 27-May-19 01:18 AM ah 27-May-19 10:19 AM https://gigabecquerel.wordpress.com/2019/05/27/workshop-update-pt-2/ 27-May-19 04:56 PM tfw you realize that the pump was fine, it was just plugged into a turned-off power strip 27-May-19 10:03 PM lol 28-May-19 12:28 PM Today Deadbeef learned that clamps help vacuum 28-May-19 12:28 PM By putting all of his weight on a vacuum seal stuck at 1.3Torr and getting it down to 497mTorr 28-May-19 12:28 PM Deadbeef is going to investigate how to clamp an acrylic bell jar down 28-May-19 12:46 PM That's should not matter. Make sure booth surfaces are flat and free of contamination 28-May-19 12:48 PM Flat, greased up, and with a silicone gasket 28-May-19 12:48 PM *as flat as they came. They are acrylic 28-May-19 12:49 PM Define greased up? 28-May-19 12:49 PM Force on a seal effecting something sounds like fiber contamination 28-May-19 12:49 PM I smeared some vacuum grease on each acrylic face before adding silicone 28-May-19 12:50 PM Like sheet silicone? 28-May-19 12:50 PM Yes 28-May-19 12:50 PM No more liquid gasket for us 28-May-19 12:51 PM Yeah scrub all surfaces with alcohol and very lightly regrease 28-May-19 12:51 PM It's not sold as gasket material, so that may be a problem 28-May-19 12:51 PM No alcohol allowed 28-May-19 12:51 PM ? 28-May-19 12:51 PM Also how light 28-May-19 12:51 PM Por que? 28-May-19 12:51 PM I was a little sloppy 28-May-19 12:52 PM Why no alcohol 28-May-19 12:52 PM You can't put alcohol on acrylic 28-May-19 12:52 PM You get micro fractures and it brittles 28-May-19 12:52 PM Mmmm 28-May-19 12:52 PM Windex then 28-May-19 12:55 PM I will look 28-May-19 12:55 PM I just got a bunch of sawdust on the grease so I have to clean it anyways 28-May-19 12:55 PM Turns out the streak free shine is surprising good at vacuum 28-May-19 12:59 PM Correction: acrylic plate I smooshed on to other plate never got deburred after I cut it to size 28-May-19 12:59 PM Flat is important for vacuum... 28-May-19 01:03 PM I think clamping would matter in this case since the surface area and diameter is so large. You won't get a good enough seal just on its own to get to deeper vacuum. In an ideal world it shouldn't be an issue, but there are too many variables for leaks to occur 28-May-19 01:03 PM I guess I should have asked how big/rigid is the plate? 28-May-19 01:04 PM 18" diameter acrylic bell jar on acrylic plate 28-May-19 01:04 PM From what I remember lol 28-May-19 01:04 PM 20" square acrylic plate at 1" thickness, bolting on a 6" square 1/4" panel 28-May-19 01:04 PM So... Not rigid 28-May-19 01:05 PM Yeah the 1/4 inch is a bit small 28-May-19 01:05 PM *thin 28-May-19 01:05 PM Should still work ok... But might need clamping just to counter deformation 28-May-19 01:06 PM It is a temporary patch 28-May-19 01:06 PM I thought this was a straight bell jar on a plate 28-May-19 01:07 PM Hoping to do a new penetration of a virgin acrylic plate this week 28-May-19 01:07 PM Any tips? 28-May-19 01:07 PM This quarter inch patch is to remove the old bluegoo circle part and to see what other problems we may be able to solve while waiting for a pair of LDS orders to come in the mail 28-May-19 01:18 PM Added bolts: 28-May-19 01:18 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20190528_161817503-C8173.jpg 28-May-19 01:18 PM I am the difference between an expert and a professional 28-May-19 01:18 PM Remember me always 28-May-19 01:34 PM Are the bolts going through the plates? 28-May-19 01:34 PM Or blind tapped? 28-May-19 01:34 PM :( adding bolts really hurt the vacuum level. Might have scratched it up, or the holes are just too close to the penetration and killing the thickness of vacuum seal 28-May-19 01:34 PM Blind tapped 28-May-19 01:34 PM I want to be insulted that you would think I would drill through, but I also know what pictures I've posted and it's a valid question 28-May-19 01:34 PM Lol 28-May-19 01:34 PM Looks like the new rate is 200mTorr per second 28-May-19 01:34 PM I wish I had gotten a rate measurement when I was down at 500mTorr achieved 28-May-19 01:38 PM you need to get an aluminum plate on the bottom of the bell jar and we need to get you that bell jar from the auction coming up 28-May-19 01:38 PM @AdamMcCombs I think you mentioned that you disliked NPT for vacuum. Any thoughts from you on how to best put a hole in the acrylic? 28-May-19 01:38 PM @Conmega it is being discussed here 28-May-19 01:39 PM NPT will work down to millitorr level 28-May-19 01:39 PM Also you may want more bolts around the edge to give better pressure distribution on the thin plate 28-May-19 01:39 PM NPT with Teflon tape at least 28-May-19 01:40 PM Yeah I added extra holes for four more bolts, but I'm about to leave to work on homework for my class in 90minutes 28-May-19 01:40 PM teflon could make it worse though wouldn't it? 28-May-19 01:40 PM at-least thats what @Mason_Yu was explaining to me the other night with my chamber which has a pirani gauge feeding through an NPT like connection. 28-May-19 01:40 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/JPEG_20190528_164039-0D86C.jpg 28-May-19 01:40 PM Tomorrow morning I'll drill and tap main panel and try it with double the bolting 28-May-19 01:45 PM The main reason teflon is not so good for sealing tapered threads is that it is very easy to over-tighten it. The tapered thread is designed to seal with compression with metal-to-metal contact 28-May-19 01:45 PM But I would say using NPT is generally not recommended for high vacuum applications 28-May-19 01:46 PM Well I'm an idiot but I may also be competent. I thought I was stuck at 1.3Torr again and drilling the bolt holes made it worse. I just realized the magnitude idicator was as e-1 and not e0 . I'm now looking at 100mTorr 28-May-19 01:54 PM Wait nvm, my bad 28-May-19 01:54 PM No, nvm 28-May-19 01:54 PM I do use NPT adapters with Teflon on my foreline. It was verified to 1x10^-3 torr 28-May-19 01:54 PM I'm using a kf25 to npt adapter from LDS 28-May-19 01:54 PM They recommend Teflon tape there. I used some heavier duty milspec tape they provide for npt vacuum stuff 28-May-19 01:54 PM It is not recommended for deeper vacuum, but for foreline stuff it can be used. 28-May-19 02:00 PM I got 89mTorr right now 28-May-19 02:00 PM To be fair, it had to be cranked down really hard. Not for adapting to plastic threads well 28-May-19 02:00 PM Nice, sounds like it's improving! 28-May-19 02:00 PM We've got an NW25 to NPT 1" coming in from LDS 28-May-19 02:00 PM That will be our sole penetration 28-May-19 02:01 PM Nice, I'm using something similar, I think like NW25 to 3/4" npt 28-May-19 02:01 PM And we'll snake Accu-Glass's SMA wires up through that from their NW40 SMA feedthrough 28-May-19 02:01 PM We did 1" because we need three or four conductors up through it 28-May-19 02:02 PM Ideally a metal baseplate would be best still, not sure how tight you can get the NPT to seal to plastic threads without failure 28-May-19 02:03 PM If you have to use teflon tape to get it to seal well, be sure to use the thick (mil-spec) type, don't overwrap, and always wrap in the direction of the thread. For such a large NPT thread, you might need a lot of torque so be careful not to destroy the threads on either end 28-May-19 02:03 PM Tru, we o-ringed the npt base with a washer 28-May-19 02:03 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20190528_170235707-AF5A9.jpg 28-May-19 02:03 PM Then it's acrylic exterior to oring to NPT exterior 28-May-19 02:03 PM And the threading only helps to squeesh the ring 28-May-19 02:04 PM But it is still an NPT thread? Tapped into the acrylic? 28-May-19 02:05 PM You do any leak checking with soapy water to see where the remaining major leaks are? 28-May-19 02:05 PM Is soapy water legit for vacuum? 28-May-19 02:05 PM It will only tighten down so much because it is a tapered thread, it may not compress the o-ring enough before destroying the thread 28-May-19 02:05 PM We figured because succ not blow that soapy water was not the best 28-May-19 02:06 PM Not really lol, but I've done it before for roughing vacuums in a pinch on one I threw together from scraps 28-May-19 02:06 PM We added washers to the NPT and ring to decrease the amount of tightening needed before oring compression, if that makes sense 28-May-19 02:06 PM We increased the shoulder height on the flange 28-May-19 02:06 PM I'm also super open to other ideas 28-May-19 02:07 PM You can also very lightly pressurize it and apply soapy water on the outside to see where it bubbles. This is dangerous though if you way over pressurized, I mean using very light pressure 28-May-19 02:07 PM But no one has said "use ____ instead of npt and a tapped hole" 28-May-19 02:07 PM And I've asked several times 28-May-19 02:07 PM Normally you use some gas blown around the outside and watch the vacuum gauge, but I don't know if you are at low enough levels to see a difference 28-May-19 02:07 PM Then the NPT thread will not seal as designed, because you are not cranking down on the tapered thread but compressing the o-ring instead, you might as well use a straight thread at that point 28-May-19 02:08 PM @Applied_Ion well with the bell jar without clamping, overpressurization isn't really possible 28-May-19 02:08 PM Yeah fair lol 28-May-19 02:09 PM Also what's preventing leak from behind the washer? 28-May-19 02:09 PM So should I rely on NPT and Teflon tape or a deformed oring for the seal? Because with the shoulder hack, we're chosing to rely on the oring and use npt only as a threaded connector, not for sealing 28-May-19 02:10 PM Oring setup may be a source of leak in your case 28-May-19 02:10 PM The oring deforms against the acrylic and the npt fitting, sealing them, or so we thought 28-May-19 02:11 PM I say spritz some soapy water and confirm where the major leak is. At least you will know and can clean it later 28-May-19 02:11 PM If you are using a washer make sure the o-ring is compressed, gas can still leak from between the washer and the fastener on the atmosphere side 28-May-19 02:11 PM Yeah, washers are not good for sealing. O ring in a groove is the preferred way 28-May-19 02:11 PM Hmm. Oring viewed from below looks pretty squished 28-May-19 02:12 PM Got a picture? 28-May-19 02:12 PM But yeah, that's not a quantifiable metric 28-May-19 02:12 PM One sec, maybe I can picture 28-May-19 02:12 PM It depends how it mates with the surfaces 28-May-19 02:12 PM I looked at it when it was off chamber, and I'm pumping down now 28-May-19 02:12 PM Just cause it's squished doesn't mean it's squished right lol 28-May-19 02:13 PM Tru 28-May-19 02:13 PM If there is a washer between the o-ring and the shoulder of the NPT feedthrough, what is stopping gas from leaking from under the washer? 28-May-19 02:13 PM Oh, there's no way to photograph the squish, the silicone gasket was cut sloppily and covers it from the inside 28-May-19 02:13 PM Oring touches chamber body and npt fitting, what's on the outside shouldn't matter, right? 28-May-19 02:13 PM Like the washer is on the atmosphere side of everything 28-May-19 02:14 PM It matters because the o-ring is making a face seal only 28-May-19 02:15 PM Can you sketch out a cross section how it's set up really quick? 28-May-19 02:17 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/JPEG_20190528_171650-3D0C4.jpg 28-May-19 02:17 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20190528_171747089-539E7.jpg 28-May-19 02:17 PM Yeah exactly 28-May-19 02:17 PM So with oring super tight on there, you're worried about a leak down the inner surface 28-May-19 02:17 PM I see your arrows Mason 28-May-19 02:17 PM They help 28-May-19 02:18 PM Wait why is there a washer and oring? Are they on the vacuum side? 28-May-19 02:19 PM No on atmosphere side 28-May-19 02:19 PM Lol 28-May-19 02:19 PM Uh, so Teflon tape on NPT threads is kosher? 28-May-19 02:19 PM And lots of lubrication when tapping the acrylic 28-May-19 02:20 PM I would recommend tapping the thread to a larger straight thread and get rid of the washer and use the o-ring 28-May-19 02:20 PM We only got NPT because that's what LDS sold and we figured that was the way to go 28-May-19 02:20 PM I didn't realize that it was tapered before this discussion 28-May-19 02:20 PM We just wanted to screw something down 28-May-19 02:21 PM I think if you tighten down the NPT enough for it to seal well, it will most likely crack the acrylic 28-May-19 02:21 PM Well we really just want to hook up a gat dang vacuum to an acrylic plate, however we can 28-May-19 02:22 PM Npt with Teflon could work for the vacuum levels you are after though 28-May-19 02:22 PM But cracking can be an issue 28-May-19 02:24 PM So if someone doesn't have a "use ____ instead of NPT" with like a specific example, URL or part number, I don't know what to do. It seems whatever I try is wrog but no one has a specifically better method. 28-May-19 02:24 PM @Applied_Ion I'll be giving Teflon tape a try tomorrow 28-May-19 02:24 PM I just thought there would be some kind of solution like conflat and a gasket that I could drill and mount on, but I'm at a loss 28-May-19 02:25 PM If it's already tapped for npt, might as well give the Teflon a try see what hapoens 28-May-19 02:25 PM https://www.ldsvacuumshopper.com/nwto1bafe.html 28-May-19 02:25 PM Is this too expensive? 28-May-19 02:25 PM Well we've got a blank acrylic panel just waiting for round two 28-May-19 02:26 PM Oh yeah lol, forgot about those 28-May-19 02:26 PM That's a more proper way to do it 28-May-19 02:26 PM OH MY GOD 28-May-19 02:26 PM For straight into a baseplate 28-May-19 02:26 PM Nice catch @Mason_Yu lol 28-May-19 02:26 PM Mason gets to name my firstborn 28-May-19 02:27 PM lol 28-May-19 02:27 PM I knew it was a vocabulary problem, that I didn't know how to ask for what I wanted 28-May-19 02:27 PM "nw25 to baseplate feedthrough" 28-May-19 02:27 PM Yeah if the NPT thing doesn't work, we'll just throw money at that 28-May-19 02:27 PM Jesus this is what I've been trying to find for a week now, I've just not been googling properly 28-May-19 02:29 PM Not a very common component, but that should work for your need 28-May-19 02:29 PM I'm almost ready to just drive to LDS today, break in and take it 28-May-19 02:29 PM @Mason_Yu I dunno if you saw earlier talks, but the final goal is to hit 50mTorr, and I'm sitting at 73 right now, so NPT with tape might do it 28-May-19 02:29 PM If not, that part is the next order we make 28-May-19 02:29 PM Thanks a ton man 28-May-19 02:33 PM Be careful not to strip the thread and crack the acrylic, and good luck! 28-May-19 02:36 PM Well if I do, the hell with it, we'll just get that friggin passthrough, since tapping means nothing to that 28-May-19 02:36 PM I'm so tired of tapping acrylic man 28-May-19 02:36 PM I've shed too much blood and gotten too many blisters working with this stuff 28-May-19 02:36 PM Oh my god and there are brass blank plugs for baseplates even if we do just totally bodge the threads 28-May-19 02:48 PM This is why I recommend moving to aluminum I mean its not too bad to machine with hand tools even 28-May-19 02:48 PM you just have to be careful 28-May-19 02:48 PM but it at-least shouldn't shatter like acrylic 28-May-19 02:48 PM Any tips on sizing aluminum plates for bell jars? I want to be able to say "we should get a 3/8" thick piece from online metals and that's $175." 28-May-19 02:48 PM Just wondering what aluminum alloy and thickness, or if there's a handy website or chart y'all consult 28-May-19 02:52 PM Something that threads and machines ok? 28-May-19 02:52 PM 6061 is by far the most common and cheapest and I think it should work find for vacuum applications. 28-May-19 02:52 PM not the cheapest cheese-grade stuff? 28-May-19 02:52 PM ya 6061 sounds usable from my limited understading. 28-May-19 02:55 PM 3/8" seems pretty beefy 28-May-19 02:55 PM I like Applied Science and his 1" thicc base 28-May-19 02:55 PM And the blind holes it afforded him 28-May-19 03:07 PM I mean it depends on what you need 28-May-19 03:07 PM if you need to build mechanical passthroughs in and such then you might want thicker 28-May-19 03:07 PM if you just need vacuum/electrical feedthroughs you might be-able to afford thinner 28-May-19 03:08 PM I'd like to move on to my next project of scripting up patterns for wafer masks to replace manual mask design 28-May-19 03:08 PM But generally just electrical and vacuum 28-May-19 03:08 PM I mean I'd personally probably go for at-least half inch.... 28-May-19 03:08 PM seems like a decent compromise and should allow for some blind holes 28-May-19 03:10 PM Price diff from 1/2 to 1 is only $70, and we'd just bump it up for the sake of bumping 28-May-19 03:25 PM :P 28-May-19 03:25 PM sounds like you have your answer 28-May-19 03:25 PM also get it big enough to fit a 25.75" OD bell jar remember :P 28-May-19 03:25 PM if you end up going that way anyway 28-May-19 03:27 PM Yeah fingers crossed that Teflon and npt works. Can't wait to try that tomorrow 28-May-19 03:27 PM And also that the team lead doesn't move goalposts again to higher vacuum. If they do, I'm going to recommend full aluminum, that passthrough thing and some kind of chamber with a hinged door. 28-May-19 03:30 PM well a bell jar would be fine for high vacuum 28-May-19 03:30 PM you just need it to be stainless or aluminum 28-May-19 03:30 PM well I mean even glass is fine 28-May-19 03:30 PM thats what most evaporation systems are and they ussually run diffusion pumps to get down pretty low 28-May-19 03:38 PM Yeah, we'd also need a bigger pump than an RV8 by Edwards 28-May-19 03:38 PM I think I saw a massive oil diffusion pump under a workbench 28-May-19 03:38 PM Also a cryopump that I need to get referbished 28-May-19 03:38 PM @Conmega our ebeam evaporator uses a fat bell jar and I love it 28-May-19 03:44 PM Well, let me know if you guys are looking for parts/pumps/etc 28-May-19 03:44 PM I am getting a lot of roughing pumps and will be getting more... 28-May-19 03:44 PM Though diffusion pumps are one thing that I won't be getting since the ones available at this auction are MASSIVE 28-May-19 03:44 PM Like one is ISO250 28-May-19 07:08 PM I use 1" thick ATP-5 aluminum plate stock, though I went this thick so I could blind tap holes for diff pump/chamber, and it also serves multi purposes for mechanical mounting to the table as well as thermal mass 28-May-19 07:08 PM The standard accepted surface finish for metal seals with orings is 32 micro inch or better. I chose ATP-5 since it has a surface finish of 25 micro inch or better 28-May-19 07:08 PM I got my aluminum plate stock from here: https://www.midweststeelsupply.com/store/ 28-May-19 07:08 PM Each plate was like $55 for a 12"x12"x1" piece. They have daily discounts, and got it when they had a good deal on aluminum 29-May-19 01:10 AM yeah, 6061 is standard Al for uhv stuff 29-May-19 01:10 AM what's currently the cheapest (dental) x-ray imaging sensor solution on the refurbished market (ebay etc)? 29-May-19 01:22 AM or used 29-May-19 01:22 AM refurbished sounds like in very good condition (expensive) 29-May-19 09:44 AM In the 18 hours since I closed valves and killed pump, the chamber has gone from 68mTorr to only 4.62Torr 29-May-19 09:44 AM I see this as an absolute win! hulk.jpg 30-May-19 01:06 AM -> the only thing i know about 5g is that it's slated to mess with weather radars a bunch 30-May-19 01:06 AM which, like, now seems like a Great time to compromise our ability to analyze weather patterns, lol 30-May-19 03:00 AM Yeah, but I'm not exactly surprised that Ajit Pai seems to be poised to do as much damage in favor of telecoms as possible before he inevitably gets swallowed by the class war 30-May-19 03:00 AM I'm mostly just frustrated that we don't need it since we still don't even use the full available bandwidth of 4G, and didn't even comply with 4G spec at all technically, until a year or so ago 30-May-19 03:00 AM Also that people are accepting numbers like "$500 billion in gdp growth and 2-3 million new jobs" if the US wins the 5G race 30-May-19 03:00 AM Just.... Pulled straight out of thin air 30-May-19 07:27 AM I have been thinking the same thing. I don’t think any of the tech prognosticators have stopped to ask an engineer the question of weather or not we need higher bandwidth than what 4G offers us right now. I know they want to plan 10 years down the road but here is where physics start to catch up with practicality. 30-May-19 07:45 AM By 7G the waves will have so little penetrating power in the atmosphere that we'll need to have a cell antenna in every sidewalk square 30-May-19 07:45 AM By 9G we'll just need wires again! 30-May-19 11:11 AM No by 9g buildings will have to be made from materials capable of reradiating and be properly tuned and match. The presence of humans will be regulated to limit the interference created by these inconvenient bags of water. 30-May-19 12:00 PM 5G hype is mostly just hype 30-May-19 12:00 PM The low latency and high bandwidth is gona make new things more feasible 30-May-19 12:00 PM but it's not some mad revolution 30-May-19 10:51 PM just bought myself one of these so I can hook my vacuum gauge up to PoE ethernet (and as I get more instruments, I'll get more of them) https://www.olimex.com/Products/IoT/ESP32/ESP32-POE/open-source-hardware 30-May-19 10:51 PM gauge is an MKS 901P 30-May-19 11:05 PM off-topic since this isn't atmospheric hackers: just bought one of these on ePay! https://www.relyon-plasma.com/relyon-plasma-products/piezobrush-pz2/?lang=en 30-May-19 11:06 PM neat 30-May-19 11:06 PM was just watching Dan Gelbart's videos on prototyping and saw the stuff about surface activation (with sandblasting, baking, and Ajax) 30-May-19 11:06 PM (if you haven't seen those videos, I highly recommend them) 30-May-19 11:06 PM @piGuy how much did it cost? 30-May-19 11:09 PM @Applied_Ion did a couple of videos on that too, they're on his twitter somewhere. super nifty 30-May-19 11:09 PM also curious about these little plasma pens 30-May-19 11:09 PM Got it for about 1/3 of retail price. Technically it's the PlasmaEtch PlasmaWand (just a rebrand) http://www.plasmaetch.com/atmospheric-plasma-wand-cleaner.php 30-May-19 11:09 PM presumably it's just two electrodes, an HV power supply, and a little blower, right? 30-May-19 11:10 PM and some piezoelectric crystal wizardry 30-May-19 11:10 PM oh is there like ultrasound in the plasma or something weird like that? 30-May-19 11:12 PM Not exactly sure how it works, but I know there's purple stuff coming from the corners of the piezo crystal at the tip. 30-May-19 11:12 PM https://shop.championsimplants.com/images/product_images/info_images/6118_c.png 30-May-19 11:12 PM that looks like corona 30-May-19 11:13 PM I'm fairly certain it's plasma and not corona 30-May-19 11:13 PM But to me it's just magic 30-May-19 11:14 PM isn't corona discharge is a form of plasma? 30-May-19 11:15 PM https://www.texim-europe.com/getfile.ashx?id=113097 30-May-19 11:16 PM oh so reading more on the product page, the piezo aspect of the device is the fact that it uses a piezoelectric transformer to get high voltages 30-May-19 11:16 PM I think so, but I think the resulting plasma is different 30-May-19 11:17 PM I think that's what they want you to think so their customers don't just buy a taser and a tiny blower 30-May-19 11:18 PM Well it'll be a fun toy to play with regardless. 30-May-19 11:18 PM yeah, looks pretty neato 30-May-19 11:18 PM (frankly, if there is any secret sauce in the thing, I suspect it's just the geometry of the nozzles, choice of voltage/current/frequency, etc.) 30-May-19 11:18 PM compare https://www.youtube.com/watch?v=jRZkrrcDKb0 30-May-19 11:37 PM Looks like a lot of work to make one 30-May-19 11:40 PM I think it's more that it's a lot of work to design one, but yeah 31-May-19 04:32 AM Oh yeah I built several of those. I actually have walkthroughs for each 31-May-19 04:32 AM 3 different classes of them 31-May-19 04:32 AM Super easy to build 31-May-19 04:32 AM Mine however is gliding arc, where the commercial unit is more blown corona, and the thought emporium one is DBD 31-May-19 04:32 AM Gliding arc is much easier, and a lot more powerful for bulk activation. Not something you would want to try touching with your bare hands though lol (from the electrical safety standpoint). Still nonthermal, so you can activate temperature sensitive stuff, just operates at a slightly higher thermal regime (warm plasma vs cold.) Result is higher overall plasma energy while still retaining nonthermal characteristics. 31-May-19 04:32 AM Handheld version: http://appliedionsystems.com/diy-handheld-gliding-arc-discharge-plasma-surface-treater/ 31-May-19 04:32 AM High power version: http://appliedionsystems.com/diy-high-power-gliding-arc-discharge-plasma-treater/ 31-May-19 04:32 AM And vortex stabilized version: http://appliedionsystems.com/diy-vortex-stabilized-gliding-arc-discharge/ 31-May-19 04:32 AM Also, using the vortex stabilized version specifically for plasma enhanced combustion experiments: http://appliedionsystems.com/diy-plasma-assisted-combustion/ 31-May-19 04:32 AM Each of them was literally built with scraps for nothing. I go over examples of different types of surface activation with each, from paper to Teflon, as well as combustion. The videos aren't remotely as pro as the thought emporium one, but they show some immediate practical experiments. 31-May-19 04:50 AM Those commercial little pen activators have such weak output it will take you a very long time to activate, if you activate anything at all. 31-May-19 04:50 AM For surface activation, the higher the power, the less time needed. 31-May-19 04:50 AM In terms of practicality, the plasma pen DBD from the thought emporium has more applications in medical science for wound healing at that level than surface activation. Larger flat surface area systems are used for ozone production, some gas reforming, and bulk activation. 31-May-19 04:50 AM Gliding arc sets itself up well for bulk activation on production lines, as well as for high power nonthermal plasma gas reforming and enhanced combustion. Lot of interesting work on the combustion side, such as plasma fuel injectors, flame stabilization, supersonic/hypersonic ignition, etc 31-May-19 04:50 AM Since nonthermal atmospheric plasma systems are so cheap and easy to build, I spent a long time studying them and playing with them since they are so accessible and versatile. Have collected a massive amount of resources on them as well. I would definitely encourage anyone to explore them and experiment with practical stuff with atmospheric plasmas! 31-May-19 08:18 PM I wonder why air bearings are so hard to find and expensive (not actually sure if they are expensive, but every site I find asks me to "Request a Quote" which usually means Expensive) 01-Jun-19 12:13 PM They want to get to know you first, so they can figure out how much they can charge you. 01-Jun-19 01:03 PM https://en.wikipedia.org/wiki/Price_discrimination yep 01-Jun-19 01:26 PM Yea in that case its usually best to make it sound like your pricing around and looking into competitors to make them want to lean towards giving you a competitive price. 03-Jun-19 12:04 PM Apparently, KOH (Lye) can be used to etch Silicon... 03-Jun-19 12:04 PM It seems to be mostly used for MEMs/Solar applications... but I wonder if it could be used for microelectronics to avoid Cl/F solutions/gasses 03-Jun-19 01:53 PM I thought NaOH was lye 03-Jun-19 01:53 PM and yes, take a glas beaker and melt some NaOH in it, see what happens 03-Jun-19 01:58 PM heh... I mean lye is just a name made up for something, I think either can be lye... 03-Jun-19 01:58 PM but KOH in particular seems most commonly used for the etch process 03-Jun-19 01:58 PM the only real limiting factor of it is that the etch depends on the crystal orientation 03-Jun-19 01:58 PM http://online.fliphtml5.com/wihc/fpdl/files/large/3.jpg 03-Jun-19 01:58 PM And it makes an inverse pyramid etch for the most common orientations... 03-Jun-19 01:58 PM Which may not be good for making transistors, but it would be something interesting to look into, it atleast doesn't over etch, and will actually stop as soon as it etches down to the point it forms a "peak" 04-Jun-19 09:52 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20190604_194813-632DC.jpg 04-Jun-19 09:52 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20190604_194806-0076A.jpg 04-Jun-19 09:52 AM Cool score from former employer 04-Jun-19 03:39 PM god damn it 04-Jun-19 03:39 PM i should check sizes if stuff before I buy it 04-Jun-19 03:39 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20190605_000950-5A2EF.jpg 04-Jun-19 03:39 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20190605_001209-3A4EE.jpg 04-Jun-19 03:39 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20190605_001353-133CB.jpg 04-Jun-19 03:39 PM but hey 04-Jun-19 03:39 PM now I own a spectrometer I have to figure out 04-Jun-19 03:49 PM a big ass spectrometer 04-Jun-19 03:51 PM yep 04-Jun-19 03:51 PM looks like it is the predecessor of this one 04-Jun-19 03:51 PM http://www.horiba.com/fileadmin/uploads/Scientific/Documents/Mono/mseries.pdf 06-Jun-19 08:31 AM Huh, had no idea that K'Nex (the toy) are made out of delrin 06-Jun-19 08:31 AM Explains why they're so expensive I guess 07-Jun-19 06:14 AM before I head out to school today... anyone use "surgical sponges" (goes by other names too) such as: https://www.micronova-mfg.com/products/sponges-wipes/novacel-sponges/ 07-Jun-19 06:14 AM we have a small amount as an alternative to pitch wood for wiping off different greases from our tiny oilers 07-Jun-19 06:14 AM but it commonly breaks them.. interested in trying more than the one model we have at school, for various other thigns (actually, polishing, which that link states it can be used for) 07-Jun-19 06:14 AM more or less seems like open cell foam of PVA 07-Jun-19 06:14 AM I was looking at reticulated polyurethane foam for another project at one point 07-Jun-19 01:43 PM I may look at getting a sample pack of all available densities 09-Jun-19 03:45 PM "ferric chloride, or, as I like to call it, The Forbidden Soy Sauce" 09-Jun-19 04:00 PM I've used ferric chloride to make di-thiols before 09-Jun-19 04:00 PM which are supposed to be less stinky 09-Jun-19 04:00 PM but to say such a thing is kinda -meh- 09-Jun-19 04:00 PM you still gotta have the thiol (or, in my case, the grignard/MgBr deprotonated of) to begin with - so stink abound 10-Jun-19 12:22 PM @taktoa Forbidden soy sauce. I may have to start using that one! 13-Jun-19 06:10 AM spring quarter final today, just a mock certification exam we have in a month 13-Jun-19 06:10 AM have next week off, but likely will be coming in 13-Jun-19 06:10 AM have a few projects to finsih 14-Jun-19 12:18 PM This series seems to be creating interesting cultural artefacts https://i.imgur.com/VaFHoNo.png 14-Jun-19 02:59 PM Any idea how/where I could get a glass wafer diced up cheaply? 14-Jun-19 06:07 PM plain old glass? 14-Jun-19 09:11 PM One of the engineers in my group was a naval reactor technician back in the day. His review of Chernobyl was that it was a good show. The exact technical details and sequence of events was a bit off but as far as conveying the general idea of what happened in a way people would find entertaining it was pretty darn good. It really was a little insight to how the Soviet system was really failing and failing fast. It could never have lasted. As Americans we were so scared about their possibly superiority and when it came down to it they were a military on top of a crumbling society. Lessons should be learned! 17-Jun-19 06:33 PM I've heard of deionized water, but what is "deionized air"??? 17-Jun-19 06:33 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/unknown-4FF3B.png 17-Jun-19 06:33 PM (this is from the service manual for a tektronix logic analyzer plugin board from the late 90s) 17-Jun-19 06:33 PM also "approximately 9 psi" lmao 17-Jun-19 06:33 PM interesting that dyno gets triggered by w t f but not lmao 18-Jun-19 11:17 AM Air not carrying a charge 18-Jun-19 11:17 AM as that happens with plastic hoses for compressed air and vacuums 18-Jun-19 11:17 AM and the pressure is maybe specified so that folks dont blast it wiht 100bar air and rip parts away 18-Jun-19 11:17 AM or damage the fans. 18-Jun-19 11:17 AM And Tek made their own IC's, so they likely knew how sensitive thye ware. 18-Jun-19 11:52 AM Dow Sylgard 184 has gotten insanely expensive over the past few years. I paid $60 two years ago and now it costs $130.... 19-Jun-19 07:29 AM <__ice9#6039> Oh that sounds like they just request not to blow ions on it 19-Jun-19 07:29 AM <__ice9#6039> Kind of like e.g. those piezoelectric or RF-based antistatic blowers 19-Jun-19 07:29 AM <__ice9#6039> @piGuy interesting that's pretty annoying. I mostly use MG Chemicals Silicone Modified Conformal Coating. Spray or brush-on. It's a bit pricy at about $13 for 55mL or $22 for 12oz aerosol on Amazon, but nowhere near as much as Sylgard. 19-Jun-19 07:29 AM <__ice9#6039> Would something like that work for your application maybe? 19-Jun-19 07:29 AM <__ice9#6039> Another possible alternative might be to buy the key ingredients in bulk from China and mix it yourself if you need large amounts anyway 20-Jun-19 07:19 AM We used to ground the metal nozzles of air blow off guns when cleaning out computers because as I recall you could jump an arc especially if it was a dry day and the air pressure was set high. 20-Jun-19 07:21 AM See, I'd be trying to pretend I have super powers at that point throwing lighting around 20-Jun-19 04:33 PM w00t, I just added a (Deckel clone) pantograph to my machinery list (tht I have bought, but still need to freight it) 21-Jun-19 08:43 AM lol why is this company selling glacial acetic acid in 30 lb pails https://ingredi.com/glacial-acetic-acid-fcc-30-lb-pail/?gclid=Cj0KCQjwgLLoBRDyARIsACRAZe7TH8MpnqIxH8Yg9sfEqx3jEosr7gmguQDQDYbUAWiT7nJRrc1eRqIaAnduEALw_wcB 21-Jun-19 08:43 AM that is a terrifying amount of acetic acid for $130 21-Jun-19 08:43 AM I thought for a second that they were just selling the pail (with label) without the contents 21-Jun-19 08:43 AM apparently GAA can be explosive in air between 5.4% and 16% 21-Jun-19 09:56 AM Anybody have an idea for cleaning silicone grease off acrylic safely? 21-Jun-19 09:56 AM Want to use fresh grease for my bell jar 21-Jun-19 10:25 AM hexane and/or pentane seem to be compatible and recommended, per a couple googles 21-Jun-19 10:25 AM also lots and lots of kimwipes 21-Jun-19 10:25 AM just mechanical cleaning will get you 99.9% of the way there, ime 21-Jun-19 10:25 AM (i assume this is like DC HVG) 22-Jun-19 03:25 PM I was watching this lecture from 2011 on the future (at the time) of lithography for semiconductor manufacture https://www.youtube.com/watch?v=sR1T853Dh-g it seems like EUV is a massive pain and judging from the fact that it's only going to be production ready in 2020 (even though people have been saying "it's the future" since 2011), I'm curious as to why it was such a favored approach over improving the throughput of e-beam lithography 22-Jun-19 03:25 PM like I'm probably just naive to the issues involved but it just seems vastly easier, for the same reason that making an electron microscope is vastly easier than making an EUV/X-ray microscope 22-Jun-19 03:36 PM wow https://www.youtube.com/playlist?list=PLM2eE_hI4gSDjK4SiDbhpmpjw31Xyqfo_ guess I know how I'm going to spend my next 12-24 (depending on if I can watch it at 2x speed) free hours 22-Jun-19 03:40 PM @taktoa the semiconductor industry does pretty much everything in parallel. they don't want to get blocked from profitability down the road, so they have a lot of redundancy and backup plans 22-Jun-19 03:40 PM @taktoa also, parallel e-beam is well underway in terms of development and attempts to commercialize for production, it's just much slower and there's lot less development on the science and engineering vs wafer-scale photolithography 22-Jun-19 03:40 PM the most recent parallel e-beam I read about seemed basically like a big fat e-beam, that they put an aperture plate with 512 x 512 holes in it, and called that a 262144 multi-beam writer 22-Jun-19 03:42 PM yeah I saw that there are a few companies attempting to commercialize it, and I guess their interim plan for getting profits is just to make masks faster/cheaper? 22-Jun-19 03:43 PM who are you referring to, the parallel e-beam companies, or semiconductor fabs? 22-Jun-19 03:44 PM the parallel e-beam companies 22-Jun-19 03:44 PM I think their interim plan is keep hoping EUV has drawbacks and that semicon companies will keep investing in solutions that aren't profitable (today) for production 22-Jun-19 03:44 PM I guess I am confused a bit by the fact that the e-beam guys are only aiming for 10 wafers per hour https://en.wikipedia.org/wiki/Next-generation_lithography 22-Jun-19 03:44 PM I don't really think those companies are selling anything useful yet 22-Jun-19 03:45 PM I guess I'm just surprised that you can't do better than that, but again I probably don't understand the issues well enough 22-Jun-19 03:45 PM I wouldn't trust wikipedia's spec/target 22-Jun-19 03:45 PM you'd have to first, at least, check when that line of the table was last edited 22-Jun-19 03:46 PM yeah 22-Jun-19 03:46 PM I wish wikipedia had something like git blame 22-Jun-19 03:46 PM also, figure the die area, or the number of features per die area... that is going up as process node goes down (at the CPU/SoC end of the production arena) 22-Jun-19 03:46 PM so for example, I recently had an e-beam pattern written by a single-beam instrument, with 33nm pixels, comprising roughly 1 inch by 2 inches (23 x 50.8 mm) and it took 18 hours 22-Jun-19 03:47 PM seems like it was added to the table on 29 April 2016‎ 22-Jun-19 03:48 PM this was in relatively thick resist (I think like 132nm) which is probably thicker than semiconductor process (meaning their stuff would require less dose, so less beam dwell time per pixel, so less overall write time) 22-Jun-19 03:48 PM and also, 1" x 2" is pretty big for a SoC/CPU die 22-Jun-19 03:48 PM chip wiki says icelake SOC is: ~11.44 mm x ~10.71 mm 22-Jun-19 03:50 PM I guess I'm also curious why WPH matters so much for e-beam. Presumably an e-beam lithography setup is much cheaper than an equivalent EUV setup, so you can just buy 10x the number of lithography machines and get 10x the throughput? I suppose the latency from start to finish will go up, but it's still going to be on the order of days, right? 22-Jun-19 03:50 PM I'm assuming that the cost of ownership of these machines is dominated by capex, though I suppose >40 kW for the EUV machine isn't cheap either. 22-Jun-19 03:51 PM so 10% of what I recently had written (albeit I used 33nm pixels, they would have needed at least probably 3x smaller) 22-Jun-19 03:51 PM hmm, could be physical real estate costs having a significant effect 22-Jun-19 03:51 PM not sure, good questions which I'm sure some euv vs e-beam review article goes into 22-Jun-19 03:53 PM thanks for giving me some background 22-Jun-19 03:55 PM this is from 2012 http://sci-hub.se/https://doi.org/10.1117/1.JMM.11.3.033011 22-Jun-19 03:55 PM "EUV100, EUV tool at €50M and 100 wph; EUV20, EUV tool at the same cost but 20 wph." 22-Jun-19 03:55 PM "multiple e-beam direct write systems (MEB DW)" "Table 2 also shows that the MEB DW tool at 20 wph can be priced at €13.33M to put the crossover point with EUV100 at infinity. The price for a 40-wph MEB tool can be €70M to be quivalent to EUV20. However, there is no reason MEB DW tools will cost that much. Even with crossover point at 5000 wafers/mask and the tremendous wafer volume of TSMC, the number of prototyping tools needed is in the single digit, hardly sufficient to interest potential equipment suppliers. In addition to the small number of tools, it is not economical to implement two different tool sets for small lots and HVM. Two types of equipment, processing, and maintenance experts have to be employed and trained. Not to mention that much more floor space has to be allocated. The strongest argument for prototyping, namely mask cost saving, can be alleviated with the mask-sharing program provided by most semiconductor foundries." 22-Jun-19 03:55 PM I seem to recall that the e-beam stuff is still improving on variability across the wafer/field-of-view 22-Jun-19 03:55 PM http://life.lithoguru.com/?m=201302 22-Jun-19 03:55 PM " Unfortunately, their first pre-production system, the Matrix 1.1, won’t ship till the second half of this year. That tool will have over 1,000 beams and run at 1 wafer per hour (as opposed to the 0.002 wph throughput of the current demonstration system). As with EUV, getting tools with sufficient throughput to enable development is a critical milestone." 22-Jun-19 03:55 PM (that was in 2013) 23-Jun-19 02:34 AM awww yeah 23-Jun-19 02:34 AM bought an ISO-100 valve on ebay 23-Jun-19 02:34 AM and for some reason it came with a window on one side 23-Jun-19 02:34 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20190623_012640-4D678.jpg 23-Jun-19 02:34 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20190623_012652-88C91.jpg 23-Jun-19 02:34 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20190623_010509-8E26C.jpg 23-Jun-19 02:34 AM and now onto the fun part, cleaning 23-Jun-19 02:43 AM Nice valve! 23-Jun-19 02:43 AM What'd it set you back? 23-Jun-19 03:29 AM 200 23-Jun-19 03:54 AM ehehehehe vacuum valve 23-Jun-19 03:54 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20190623_125643-92D45.jpg 23-Jun-19 03:54 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20190623_125649-3AFA5.jpg 23-Jun-19 03:54 AM this is going to be... fun 23-Jun-19 05:03 AM what vacuum pressure is that 'standard' dow silicone grease good for? 23-Jun-19 05:23 AM it says e-6 on the tube 23-Jun-19 05:23 AM but it also works well below that, after some time for outgassing 23-Jun-19 05:02 PM Wait, these sort of valves rely only on grease between moving parts? I assumed it was way more magical than that... But that makes me feel a lot happier! 23-Jun-19 05:11 PM I wasn't really referring to the valve, but was a general question (I have a crazy idea of having a watch/clock in a chemistry flask with total vacuum, and that grease is used for ground glass joints in chemistry all the time) 23-Jun-19 05:11 PM my chemistry setup did not get below 50 torr though 23-Jun-19 05:11 PM but, I have bigger and better pumps now, including a TM 23-Jun-19 05:11 PM Imagine a ship in a bottle.. but a clock, is the base idea 23-Jun-19 05:12 PM Mmm 30-Jun-19 12:27 PM amazon reviews for https://www.amazon.com/Whink-1281-10OZ-Stain-Remover/dp/B000LNQNM0/ref=cm_cr_arp_d_product_top?ie=UTF8 are downright horrifying 30-Jun-19 01:53 PM Yes. Surprising that more people have not been killed by it. 30-Jun-19 03:56 PM whoa, i'm surprised that it's HF and not something like normal HCl 30-Jun-19 04:30 PM Yep 01-Jul-19 12:38 AM not really surprising if you consider that HF toxicity in skin burns increases exponentially with concentration, to the degree that, quoting https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4116323/, "Monitoring of electrolyte levels and ICU admission should not be a part of the management practice in these small HF burns caused by common workplace and household chemicals." 01-Jul-19 12:38 AM and more on the "exponential" part here: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6290397/ 01-Jul-19 12:42 AM Aaaaah! That explains a lot. 01-Jul-19 12:42 AM First time I hear about that exponential part. 01-Jul-19 12:45 AM a lot of the stories about HF that float around are talking about concentrations >20%, often >50%, which is something I indeed refuse to work with under any circumstances. 1~5% is still quite bad by mineral acid standards but nowhere near "spill this and die instantly" level people tend to treat it with. eye and respiratory burns, as well as chronic exposure, are actually much more concerning here if you work with it in a way that involves HF vapors. 01-Jul-19 02:37 AM have fun 01-Jul-19 02:37 AM fun fact: there are at least two kinds of HF burns 01-Jul-19 02:37 AM even thinking of them triggers phantom pain in my finger tips 01-Jul-19 11:06 AM kind of funny that they named their power supply company "Gamma", when there's already a famous one called "Delta" https://www.ebay.com/itm/T155678-Lot-13-Gamma-High-Voltage-Power-Supplies-UC12-1-5PN-UC18-1-5PN/332967174713?hash=item4d8663e239:g:PzgAAOSws~pcEYAI 01-Jul-19 12:08 PM Heh. That's quite fine, compared to it being Dalta, Dhelta or something like that. 01-Jul-19 12:08 PM But that's a decent pile of PSU's. 01-Jul-19 12:08 PM Too bad the shipping is 100usd. 01-Jul-19 12:26 PM speaking of power supplies, uh. .. uh.. i'm .. not sure i have a need for this, but i want it... https://www.ebay.com/itm/Spellman-RHR120N480-RVC-TP-OL-X1645-High-Voltage-Power-Supply/252394882800 01-Jul-19 12:26 PM -120kV, 4mA. i sent the seller a message asking for more details on power input and whether they have any associated documentation 01-Jul-19 12:26 PM x1645 means it's been customized 01-Jul-19 01:03 PM Could do a lot with that supply lol. Actually a friend of mine got a beast of a 300kV supply at the MIT flea market recently 01-Jul-19 01:05 PM assuming it can deliver ~4mA at 30kV, it's a 4x improvement in rep rate for my capacitor bank >.> which currently is something like a 10 minute charge cycle with my 30kV 1mA spellman 01-Jul-19 01:05 PM honestly the best thing would be an adjustable-voltage tdk lambda ALE supply; something measured in kJ/sec 01-Jul-19 01:07 PM Oh yeah, I have one of those. 40kv, 1kJ/s. I haven't actually tried it yet 01-Jul-19 01:07 PM >.> envious 01-Jul-19 01:07 PM Only if it works lol. If not it's just a sad paperweight 01-Jul-19 01:09 PM is it one of the 102A series? or is it a rackmount thing? 01-Jul-19 01:09 PM Yeah I think 102A series 01-Jul-19 01:10 PM there's a 10kV 1kJ/s one on ebay rn and i wish i had a use for it, i can't really sacrifice that additional 15kV that my bank can manage, way too much energy loss 01-Jul-19 01:10 PM Friend gave it to me for free since he had several that were being trashed 01-Jul-19 01:10 PM Thst he saved from the trash, not trashing himself lol 01-Jul-19 01:11 PM nice save :D 01-Jul-19 01:11 PM Yeah, a loss of 15kv would really kill enefgy 01-Jul-19 01:13 PM also hey, do you have any clever solutions for safeing capacitor banks remotely? do you just rely on bleeder resistors, or chicken stick + earmuffs? 01-Jul-19 01:13 PM i'm thinking about trying to make some gravity-assist shorting switch with an electromagnet so i can drop a sturdy couple of ohms across terminals from a safe distance. all of my bleeder resistors are spiral-etched things that i fear might introduce a lot of parasitic inductance, and it'd be nice to have multiple safety mechanisms for these things even if i keep the resistors 01-Jul-19 01:16 PM Normally I do chicken stick with ear mugfs, but the caps I have worked with where relatively small. For bug pulse caps I would not do that. I'd say combination of bleeder resistors as well as a mechanical dump into a load. So maybe some actuator that shorts the cap into a grounded load resistor 01-Jul-19 01:17 PM (... also, what's the shade of blue you used on your capacitors? :D i gotta touch up a couple rust spots) 01-Jul-19 01:18 PM At the linac we use 60kv rated vacuum relays that are mechanically actuated, but you can just use an electromagnet or some mechanical actuator 01-Jul-19 01:18 PM Can be triggered remotely, as well as be used as a safety interlock 01-Jul-19 01:18 PM I used Rustoleum royal blue gloss enamel coating for the caps 01-Jul-19 01:18 PM Though now they are wrapped in sheets of poly you can't tell lol 01-Jul-19 01:20 PM nod i was surprised how much vacuum relays seem to go for on fleabay, guess i'll maybe keep my eyes peeled for a cheap one or otherwise work on a shorting doodad of my own 01-Jul-19 01:23 PM Yeah vacuum relay isn't really that necessary, just convenient from the high voltage standoff point 01-Jul-19 02:22 PM y'all must be newcomers to the homecmos stuff 01-Jul-19 02:22 PM that's the go-to chem for DIY etching 01-Jul-19 04:10 PM Vacuum relays are desired by ham operators for amplifier building, so they often get expensive on ebay. 01-Jul-19 07:24 PM has a ham license 01-Jul-19 07:43 PM also has a ham license 01-Jul-19 08:31 PM waves fist 01-Jul-19 09:48 PM i am pretending i have my ham license and trying to be really cautious about my spurious EM emissions because once i have my ham license i won't have plausible deniability anymore 01-Jul-19 10:39 PM Heh. 01-Jul-19 10:39 PM Less plausible deniability. 01-Jul-19 11:24 PM don't have a ham license, want to be a pirate 02-Jul-19 01:17 AM Yarrr! 02-Jul-19 03:38 AM Heya folks, how long was I gone for? 02-Jul-19 04:08 AM your last message was from 24.01.2019 02-Jul-19 04:08 AM welcome back! 02-Jul-19 04:16 AM Heya :3 02-Jul-19 04:19 AM did anything happen in the months we missed? 02-Jul-19 04:44 AM Not on my end sadly. 02-Jul-19 04:44 AM Except now I'm medicated better :) 02-Jul-19 04:54 AM yay! 02-Jul-19 09:44 AM ehehehhe 02-Jul-19 09:44 AM drugs \o/ 02-Jul-19 11:07 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20190702_191133-57A31.jpg 02-Jul-19 11:07 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20190702_191216-489C6.jpg 02-Jul-19 11:07 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20190702_192151-30174.jpg 02-Jul-19 11:07 AM once this thing is repaired @AdamMcCombs can no longer complain about my "looks like there's no leaks in there" 02-Jul-19 11:07 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20190702_195810-35A58.jpg 02-Jul-19 01:40 PM more bins yay \o/ 02-Jul-19 01:40 PM oh wow, a magnetic sector mass spec leak tester, neat 02-Jul-19 01:40 PM i sent spellman a couple of questions about the -120kV 4mA PSU up above and got an extremely firm 'that thing is decades old, we can't support it, repair it, and we have absolutely no documentation for it. ' response 02-Jul-19 01:40 PM also, so, the X designation at the end of a spellman supply means it's had OEM customizations done to it, which, apparently, includes a clause that they will never ever ever release details about the modifications they made to it to anyone other than the OEM themselves 02-Jul-19 01:40 PM so 02-Jul-19 01:55 PM oh, wow 02-Jul-19 01:55 PM I had a totally different experience with glassman 02-Jul-19 01:55 PM "here's all the documentation, datasheet, circuit and all, here's what's different about your version and here's the contact data of the lab who ordered those power supplies if you have any questions about the history" 02-Jul-19 01:55 PM @qualia where'd you get the "magnetic" part from? Is it a guess or did you look up the device? 02-Jul-19 01:55 PM I haven't looked up any information on it, didn't know I'd get it until some days ago... 02-Jul-19 01:59 PM i looked up the device real quick and found a manual 02-Jul-19 01:59 PM sec 02-Jul-19 01:59 PM https://www.idealvac.com/files/manualsII/Leybold_UL100_Plus_Operation_Instructions_Manual.pdf 02-Jul-19 02:00 PM thanks! 02-Jul-19 02:00 PM that .. actually may not be the exact same device tho 02-Jul-19 02:00 PM will look into it once I'm home 02-Jul-19 02:03 PM there's that one Cliff guy that popped up on the fusor forums who's like some kind of vp of engineering at spellman, i kind of want to reach out to him directly and see if he could be at all helpful. dunno 02-Jul-19 02:04 PM he always appeared nice 02-Jul-19 03:03 PM yep, the MS is a magnet sector thingy 02-Jul-19 03:03 PM I am considering what I need more in my life, a leak tester or a bodged together calutron 02-Jul-19 04:28 PM @GigaSquirrel @qualia Who did you reach out to at Spellman? 02-Jul-19 04:31 PM i just went through their website frontpage contact box 02-Jul-19 04:43 PM just accidentally a -30kV 32mA power supply instead >_>` 02-Jul-19 04:43 PM @GigaSquirrel gonna guess you probably want the former to build the latter 03-Jul-19 12:04 AM @AdamMcCombs I talked to glassman, not spellman 03-Jul-19 12:04 AM just wanted to hilight the contrast 03-Jul-19 12:04 AM @qualia you might be right... 03-Jul-19 02:28 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/unknown-66C21.png 03-Jul-19 02:28 AM I am pretty sure this is an x-ray of a running calutron 03-Jul-19 02:28 AM the only thing I don't get is why the beam is white 03-Jul-19 05:45 AM Hey, xrays are supposed to be my thing :P 03-Jul-19 05:46 AM too bad 03-Jul-19 05:46 AM do you have a device that can look through objects, meters in size and mostly made of steel? 03-Jul-19 05:47 AM Well, with a long enough exposure... 03-Jul-19 05:49 AM fair enough 03-Jul-19 05:49 AM more time and or more energy and or more current 03-Jul-19 05:52 AM All I got is 70kv at 7ma :P 03-Jul-19 05:53 AM sounds like a heliodent 03-Jul-19 05:54 AM Yep 03-Jul-19 05:54 AM 3 second duty cycle to boot 03-Jul-19 05:54 AM It's a heilodent md 03-Jul-19 05:55 AM but 3 seconds beam, 3 minutes cooldown, right? 03-Jul-19 05:55 AM Probably? 03-Jul-19 05:55 AM It only ever said 3 seconds max exposure 03-Jul-19 05:55 AM I generally keep it to 1 or 2 seconds max, and then just monitor the temp of the head, when it gets toasty I give it a half hour break 03-Jul-19 05:57 AM should be well enough 03-Jul-19 05:57 AM only thing that bothers me is the missing current adjustment in the heliodent 03-Jul-19 05:57 AM it floods out my detector 03-Jul-19 05:58 AM Lol 03-Jul-19 05:58 AM At some point I'd like to pick up a real xray head and power supply, but hey, this one only cost me $50 03-Jul-19 05:58 AM Plus it generally gets the job done 03-Jul-19 05:58 AM I'd just really like a digital sensor and maybe a microfocus tube, but this one should be fine if I'm using digital dental detectors 03-Jul-19 06:02 AM I've got an x-ray detector, consisting of a scintillator screen and one hell of an image intensifier tube 03-Jul-19 06:03 AM I use film cassetes and a DSLR 03-Jul-19 06:03 AM I'm guessing the scintillator has a 20 cm radius 03-Jul-19 06:03 AM and it's a nice detector, gives clear images 03-Jul-19 06:03 AM but the heliodent just overloads the tube 03-Jul-19 08:58 AM You know, I should have enough xray output if optimized with a heavy metal target for xray yields to do something like this lol. Way too dangerous right now though, I'm trying to minimize xrays for now 05-Jul-19 12:22 AM the calutron xray is awesome 05-Jul-19 12:22 AM totally want to build one 05-Jul-19 01:20 AM me, too! 05-Jul-19 04:16 PM Anyone here ever use ollydbg? Or debugged/disassembled Delphi applications? 05-Jul-19 04:16 PM Been trying to figure out how to get into the service mode for my FIB GUI. 05-Jul-19 04:16 PM started with GHIDRA and then found DeDe and IDR and Source Code Rescuer and then decided to just try opening the app in a VM (not on the FIB machine) 05-Jul-19 04:16 PM But getting some exception that is preventing the app from opening, EOleSysError... Seems like some dependent DLL or ActiveX isnt installed/registered 05-Jul-19 04:16 PM ( been doing all this in a VM so far, would like to reduce the amount of work on the real system) 06-Jul-19 06:01 AM @GigaSquirrel it's not that much magic, right? 06-Jul-19 06:01 AM and instead of the baffle in the xray pic i could use movable aperture 06-Jul-19 06:04 AM yep 06-Jul-19 06:05 AM so that it is more versatile - like a common sector MS? 06-Jul-19 06:37 AM not "like" 06-Jul-19 06:37 AM it is a sector MS 06-Jul-19 06:37 AM just optimized for higher currents 06-Jul-19 06:37 AM usually up to 100 mA beam current 06-Jul-19 07:00 AM yeah just wanted to make clear that in mean a design like used in ion implantation rigs 06-Jul-19 07:00 AM that I mean 06-Jul-19 07:00 AM in principle i could use a flex tube wich is actuated externally to catch the isotope i want with a cup mounted on the flange on the end of the flextube 06-Jul-19 07:00 AM right? 06-Jul-19 07:00 AM ok never tested how much I can stress evacuated flex tubes 06-Jul-19 07:00 AM in principle I need a short piece of flextube as a joint 06-Jul-19 07:00 AM what I mean is that a 90 deg calutron/ sector MS is more flexible for different isotopes 06-Jul-19 07:00 AM a 180 or 225 deg calutron has a higher yield i guess 06-Jul-19 07:00 AM but it is more complicated? 06-Jul-19 07:15 AM 180° should still be pretty easy to do 06-Jul-19 07:23 AM well you need to build a larger chamber 06-Jul-19 07:23 AM 90 deg is more or less standard tubing stuff 06-Jul-19 07:23 AM but of course it's not impossible for an hobbyist 06-Jul-19 07:23 AM just more hours 06-Jul-19 07:38 AM I think you need to build a custom chamber anyways, so not too much difference between 90 and 180 06-Jul-19 11:58 AM hmm ok 06-Jul-19 11:58 AM thought about using the beamline I already have 06-Jul-19 12:14 PM excuse me you what 06-Jul-19 04:09 PM man, the """build system""" for molflow is hilariously bad 06-Jul-19 04:09 PM (it is really just two bash scripts that run g++ ../src/*.cpp basically) 06-Jul-19 04:09 PM currently writing a nix package for it @qualia @Teh 06-Jul-19 06:14 PM is geant4 in nix 06-Jul-19 06:14 PM a nucl-ex package set overlay whatever the heck for nixos would be rad on ice 06-Jul-19 06:14 PM geant4 and root and g4beamline and all the other wonky solver codes that are irritating to combobulate together 06-Jul-19 06:14 PM i'm so sleep deprived omg 06-Jul-19 06:24 PM @taktoa you can just import cad files in molflow, no need to build it really in there 06-Jul-19 06:24 PM I have done a lot of molflow simulation, you using it for your projects? 06-Jul-19 06:24 PM Oh wait nvm you are talking about comp sci stuff I misread that lol 06-Jul-19 06:46 PM @N00N I also see mention of beamline, what is yours like? Built or in the works? 06-Jul-19 08:36 PM yeah geant4 and root are in nix 06-Jul-19 08:36 PM actually as bad as the molflow UI is, I feel like I have to give it some points for being comprehensible enough that I got a simulation running in about 20-30 minutes of fiddling (with no prior experience) 06-Jul-19 08:36 PM compared to like OpenFOAM or something that's pretty good 06-Jul-19 08:36 PM and yeah I'm planning on doing molflow simulations for my vacuum chamber setup 06-Jul-19 08:36 PM to prevent spending money inappropriately 06-Jul-19 08:36 PM btw @Applied_Ion I actually have a decent amount of experience with the lattice boltzmann CFD algorithm, which IIRC is the only CFD algorithm applicable to high Knudsen number flows 06-Jul-19 08:36 PM I'm not sure how bad the accuracy is compared to these monte carlo programs like molflow though 06-Jul-19 08:36 PM I'd expect that there's some level of vacuum where monte carlo or directly solving the boltzmann equations would be better than lattice boltzmann 06-Jul-19 08:36 PM I guess in lattice boltzmann you have to store/compute with at least 19 numbers (assuming D3Q19) per grid cell, which means that monte carlo is definitely better if you have less than 19 particles per grid-cell-volume 06-Jul-19 08:36 PM err, well I guess a particle has 6 degrees of freedom so it's more like 3 particles per grid-cell-volume 06-Jul-19 09:36 PM Nice! Sounds like you have a lot more simulation experience than I do, overall my experience is pretty limited lol 06-Jul-19 11:29 PM Super off topic...but anyone into fossils? https://i.gyazo.com/3472e3df4b47d03744befc0fce09c3dc.jpg 06-Jul-19 11:29 PM Terrible UV photo: https://i.gyazo.com/d7b1d1e7053040c921607212613e87f2.png 07-Jul-19 12:03 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/Screenshot_20190707-000231-1A623.png 07-Jul-19 12:27 AM oo backyard 07-Jul-19 02:26 AM @GigaSquirrel i've already purchased it 07-Jul-19 02:27 AM sweet, pics? 07-Jul-19 02:39 AM i mean "beamline" ... just a bent tube with flanges ... hmmm pics 07-Jul-19 02:39 AM @Applied_Ion well it was already complete 08-Jul-19 10:25 AM @taktoa just saw your mention or working on packaging molflow. cool! ive been playing with the idea of packaging random science simulation stuff but was swamped with other things 08-Jul-19 10:25 AM lets start a scientific software packaging workgroup ;P 08-Jul-19 12:32 PM omg yay please give me a reason to dive headfirst back into nix 08-Jul-19 12:32 PM well, another, really 08-Jul-19 02:37 PM open a github issue and start listing things to package :p 08-Jul-19 02:37 PM or discourse post or something 08-Jul-19 08:00 PM @taktoa I've read a good bit and watched a few long YouTube videos on the lattice boltzmann technique, have been meaning to try doing some micro/nano fluidics simulations based on BRLCAD models of some stuff 08-Jul-19 08:00 PM Palabos is the tool i was looking at for that,been a few years now since I was into that end of research 08-Jul-19 08:00 PM Fenics was another software that I was thinking seemed like it could be a good way to start 08-Jul-19 08:00 PM Just came across a few more just now, openLB, walberla, musubi 10-Jul-19 03:23 PM @Applied_Ion how do spark gaps in high vacuum work? 10-Jul-19 03:23 PM iirc you only have field emission and thermionic emission 10-Jul-19 03:23 PM the latter would be way to slow 10-Jul-19 03:34 PM You can still get arcs in vacuum. It's just a forced, on purpose breakdown. You are just overvolting a gap, except the dielectric is vacuum instead of air. 10-Jul-19 03:35 PM but what is forming the arc? 10-Jul-19 03:35 PM I'm just assuming it's too short for thermionic emission 10-Jul-19 03:35 PM so field emission is the way to go 10-Jul-19 03:35 PM but that can't sustain an arc, can it? 10-Jul-19 03:36 PM Field emission would be dominant in the case I am referring to, especially for the power and intensity involved 10-Jul-19 03:36 PM A spark gap switch doesn't need to be sustained 10-Jul-19 03:36 PM Just a brief pulse 10-Jul-19 03:38 PM hmmm 10-Jul-19 03:39 PM also: 10-Jul-19 03:39 PM https://www.excelitas.com/product/triggered-vacuum-spark-gaps 10-Jul-19 03:39 PM https://www.relltubes.com/products//Vacuum-Spark-Gap.html 10-Jul-19 03:41 PM well, today I learned something 10-Jul-19 03:41 PM any tips on what the teardown will be? 10-Jul-19 03:41 PM is it a single part (eg. resistor, capacitor or spark gap) or multiple elements in one, eg. pulse forming network? 10-Jul-19 03:44 PM its a conversion 10-Jul-19 03:44 PM single part overall, but multiple components 10-Jul-19 03:44 PM more exciting than the stuff listed lol, this is not something I have seen anyone dissassemble in the DIY crowd before lol 10-Jul-19 03:44 PM actually, I dissasembled it a while ago, just haven't revealed it yet 10-Jul-19 03:44 PM been waiting for the right time 10-Jul-19 03:44 PM its a pretty important part for accelerators... 10-Jul-19 03:50 PM ion / electron source? 10-Jul-19 03:59 PM Lets just say its a wee bit bigger than the average equivalent component we have seen posted here before by other members who delve into beam related systems. Sadly, it's still far too weak and pathetic in its current state for my needs, hence the radical rebuild and upgrade! 10-Jul-19 04:00 PM exciting! 10-Jul-19 04:04 PM Speaking of which, I've just about finished the Superfish field modeling of the upgrade, I think I'm happy with the results 11-Jul-19 12:57 AM sweet! 11-Jul-19 01:01 AM Hah, this crowd would be hooked. 11-Jul-19 01:01 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/2019-07-11-1097-worsening-safety-situation-0C0C8.png 11-Jul-19 01:01 AM via http://www.sandraandwoo.com/ 11-Jul-19 05:02 AM ^^ 11-Jul-19 05:02 AM i need https://www.ebay.de/itm/163701619102 11-Jul-19 05:02 AM but 5k hmmm 11-Jul-19 05:02 AM i guess, if i try to build such a CHORDIS from scratch i'll end up spending more then 5k? 11-Jul-19 05:02 AM + it could be not that good? 11-Jul-19 05:02 AM riiight? 11-Jul-19 05:02 AM riiight? 11-Jul-19 05:12 AM just buy it 11-Jul-19 05:12 AM and also lol, the name of the seller is very... poetic 11-Jul-19 05:12 AM translates to "dead matter poet" 11-Jul-19 05:15 AM yeah kinda scary 11-Jul-19 05:15 AM for an ebay user name i mean 11-Jul-19 05:15 AM btw this red-brown stuff is ceramics? 11-Jul-19 05:15 AM what kind of ceramics? 11-Jul-19 05:15 AM and what's the easiest way to make decent such-ceramics-stuff 2 metal joints? 11-Jul-19 05:15 AM is this state of the art: http://candle.am/wp-content/uploads/2017/03/V.-Vardanyan-15.03.2017.pdf 11-Jul-19 05:15 AM ? 11-Jul-19 05:15 AM what i mean is, doing that from scratch would imply months of trying? 11-Jul-19 05:15 AM or is it not that hard if i use stuff like https://www.s-bond.com/products/s-bond-solder-alloys/ 11-Jul-19 09:42 AM "Austanitic Stainless Steels"...thats an interesting way to spell "Austenitic" 11-Jul-19 09:42 AM Interesting though 11-Jul-19 11:30 AM ehehe 11-Jul-19 11:30 AM autistic painless feel 11-Jul-19 11:58 PM moin 11-Jul-19 11:59 PM Evening 11-Jul-19 11:59 PM Busy day? 12-Jul-19 12:00 AM for me? 12-Jul-19 12:00 AM never! 12-Jul-19 12:00 AM Yeah 12-Jul-19 12:00 AM always slack 12-Jul-19 12:01 AM You know that's not a terrible idea 12-Jul-19 12:01 AM :)) 12-Jul-19 12:01 AM no, today is a day for ugly coding 12-Jul-19 12:02 AM Lol 12-Jul-19 12:02 AM I'm trying to deal with some ones else's ugly code today... 12-Jul-19 12:04 AM ewww worst case scenario 12-Jul-19 12:05 AM Bug I encountered today was it just dumping 3s over console 12-Jul-19 12:05 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/MVIMG_20190709_055453-900C3.jpg 12-Jul-19 12:07 AM hum cant see a thing 12-Jul-19 12:07 AM only the discord icon 12-Jul-19 12:07 AM ah now 12-Jul-19 12:07 AM 33333333333333333 12-Jul-19 12:07 AM :3 12-Jul-19 08:51 AM @Applied_Ion we want pictures!!! 12-Jul-19 08:54 AM Oh I got pictures 12-Jul-19 08:54 AM Plenty of the inside of the injector 12-Jul-19 08:54 AM Just a teaser for the teardown to come! 12-Jul-19 08:54 AM Not to mention the rebuild! 12-Jul-19 08:54 AM Not only will there be pics of the new one, but full cad models, simulations, etc 12-Jul-19 08:54 AM This will be just like the thrusters 12-Jul-19 08:57 AM what kind of injector is it? 12-Jul-19 09:01 AM -125kv, 10A injector for a 60 mev linac 12-Jul-19 09:01 AM Too weak tho, need far more power for EXEDA 12-Jul-19 09:02 AM just current handling capacity, i assume? 12-Jul-19 09:02 AM Current and voltage 12-Jul-19 09:02 AM I'm pushing this thing to the limits of what it can physically handle in theory 12-Jul-19 09:03 AM Is conditioning just not a thing to worry about in a setup like that? 12-Jul-19 09:03 AM Remember, this will serve as the primary injector for my own beamlines, one system until now would have been considered impossible to do at home, and another is a long forgotten accelerator 12-Jul-19 09:03 AM @AdamMcCombs not for the upgrade I'm doing 12-Jul-19 09:03 AM It's a rather unique class of accelerators, you don't see discussed really in mainstream accelerator field anymore. The big guys want energy. I want power. 13-Jul-19 11:46 AM Well FML 13-Jul-19 11:46 AM I've just been fired, and I don't understand why 13-Jul-19 11:46 AM this is not going to ruin me, but now I am missing out on a trip to chernobyl and the dissassembly of a particle accelerator, from which I could have taken a lot of stuff 13-Jul-19 11:49 AM explicitly fired and not just laid off? 13-Jul-19 11:49 AM Sorry to hear that. Hopefully greener pastures are on the horizons 13-Jul-19 12:03 PM I only did a Internship and some work here and there, but I was promised to be employd there after I finished uni 13-Jul-19 12:03 PM but now my boss wants to stop all contact with me 13-Jul-19 12:03 PM basically told me he never wants to see me again 13-Jul-19 12:03 PM because someone I'm friends with did something bad in his eyes 13-Jul-19 12:05 PM Well consider it dodging a bullet 13-Jul-19 12:05 PM Sounds like a lovely case of special snowflake syndrome and micromanagement 13-Jul-19 12:10 PM yep 13-Jul-19 12:10 PM just too Bad, the Job itself was quite fun 13-Jul-19 12:22 PM Wow that's terrible 13-Jul-19 12:22 PM That even legal reason for termination? 13-Jul-19 12:23 PM well I wasn't legally employed, that's the issue 13-Jul-19 12:23 PM I did an internship and was promised a job once I'm done with uni 13-Jul-19 12:23 PM and atm it looks like not even that internship was legal 13-Jul-19 12:24 PM Still a bad way to handle it. You probably did dodge a big bullet, despite missing out on some cool stuff 13-Jul-19 12:24 PM yep... 13-Jul-19 04:36 PM yup, consider yourself lucky to get out of it now before it is too late. 13-Jul-19 04:36 PM :-D 13-Jul-19 06:59 PM That sucks. Well the job itself may not have counted for anything but the experience sure does. You take that and the knowledge with you. 14-Jul-19 06:40 AM wuddafa 14-Jul-19 06:41 AM @N00N bless you! 14-Jul-19 06:41 AM tnx 14-Jul-19 11:13 AM I need someone who knows mon-metric threads 14-Jul-19 11:13 AM is there a difference between 3/8-28 UNF and 3/8-28 UNEF? 14-Jul-19 01:11 PM yes - according to the resources i have neither one is actually part of the ANSI norms 14-Jul-19 01:11 PM it's either 3/8 32 UNEF or 3/8 24 UNF 14-Jul-19 01:11 PM it's like asking for metric M3x0,6 14-Jul-19 01:11 PM yes, you can definitely cut that, but it won't fit anywhere. 14-Jul-19 01:19 PM I don't get your last point 14-Jul-19 01:20 PM it means "are you sure this is the thread size you need?" 14-Jul-19 01:22 PM I mean 14-Jul-19 01:22 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/photo_2019-07-14_22-22-03-B5F82.jpg 14-Jul-19 01:22 PM Yes? 14-Jul-19 01:22 PM you asked for 3/8 28 14-Jul-19 01:22 PM so as i told you 14-Jul-19 01:22 PM 3/8 32 is UNEF or "Extra Feingewinde", 3/8 24 is "Feingewinde" 14-Jul-19 01:22 PM 3/8 16 would be UNC or "Grobgewinde" 14-Jul-19 01:22 PM 3/8 20 is UNR or "Regelgewinde" though i have never seen that anywhere i could remember 14-Jul-19 01:22 PM only UNC and UNF and some UNEF on loadless threads 14-Jul-19 01:26 PM ah, yeah, that -28 was from the wrong datasheet and that number somewhat stuck in my mind 14-Jul-19 01:41 PM oh, ok 14-Jul-19 01:41 PM well now you know 14-Jul-19 01:45 PM thanks ❤ 14-Jul-19 01:49 PM anytime <3 17-Jul-19 03:49 PM https://twitter.com/memecrashes/status/1151623202436784130 18-Jul-19 09:55 AM yeah 19-Jul-19 08:12 AM I do tubes and have the same issue. 19-Jul-19 11:32 AM Yay toy 19-Jul-19 11:32 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20190719_212607-0AE15.jpg 19-Jul-19 11:32 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20190719_212651-FD1D4.jpg 19-Jul-19 11:32 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20190719_212602-08AB1.jpg 19-Jul-19 11:32 AM Hamfests are the best, paid 1eur 19-Jul-19 11:32 AM Has annoying fans tho 19-Jul-19 11:37 AM ohh, very nice! 19-Jul-19 11:37 AM what risetime? 19-Jul-19 11:41 AM Hard to make out in the manual https://literature.cdn.keysight.com/litweb/pdf/00222-90904.pdf?id=1865281 19-Jul-19 11:41 AM Less than 20ns? 19-Jul-19 11:41 AM And with variable pulsewidth from 30ns to 5ms 19-Jul-19 11:41 AM It's worth the mechanical parts for 1eur 19-Jul-19 11:43 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/unknown-BEA3A.png 19-Jul-19 11:44 AM I got other stufftoo, but this is the only one really relevant to this discord. 19-Jul-19 11:48 AM sweet 19-Jul-19 11:55 AM Usual radio stuff. SOme antennas ( likely gona just harvest the SMA cables, some junk boards with good parts, thick power cable for DC runs, a signal generator, a power meter (a weird one for 1eur) and a "Level measurement receiver" 19-Jul-19 11:55 AM I think the receiver is meant to be used along with the similar transmitter to measure communications circuits 19-Jul-19 11:55 AM but it has a 600ohm audio output in the back so I guess it has an AM or SSB demodulator. 19-Jul-19 11:55 AM It was 20eur. 19-Jul-19 12:31 PM https://petapixel.com/2013/07/29/hack-transforms-common-microscopes-into-gigapixel-superscopes/ 19-Jul-19 12:31 PM That's interesting. 19-Jul-19 12:31 PM I wonder how it would work for semiconductor stuff 19-Jul-19 11:05 PM finally finished modelling my diffusion pump stack (mainly just to get good at using solidworks since it's been a long time since I last used it) 19-Jul-19 11:05 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/SLDWORKS_YNlqNIrjjJ-80AF1.png 19-Jul-19 11:29 PM nice 20-Jul-19 01:15 AM Molecular simulation time! 21-Jul-19 09:38 AM I may build myself a small metal spinning rig just to make the jets for small pumps. I have had the idea to make small portable vacuum systems for a while now. It just seems all the common companies are catering to high end research with big bucks and nobody is catering to the small companies and experimenters. They are all forced to go to eBay basically and get questionable parts from dubious sources. 21-Jul-19 05:04 PM I think I am going to start binging MacGyver.. dont recall seeing a single episode 23-Jul-19 10:33 AM Anyone know much about pneumatic solenoids? Trying to figure out the pros/cons of these two designs and not having much luck. Style 1: https://www.ebay.com/itm/222619479580 Style 2: https://www.ebay.com/itm/254195256832 24-Jul-19 08:13 AM First thing I notice is one is 24 VDC and the other is 12 VDC. Other than that I have little experience with these little ones. We use Parker or Gem Sol brands. Occasionally ASCO or a few others, but generally much larger. 24-Jul-19 05:45 PM Yeah the voltage difference was just my sloppy link grabbing because they come in a ton of different options . More curious about the functional difference side of things 26-Jul-19 11:02 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20190725_164842-EFAF1.jpg 26-Jul-19 11:02 AM finest bbq 26-Jul-19 11:21 AM heh 27-Jul-19 11:35 AM untz.. on our way to the vet for a dry skin patch a loose dog (In front of his house as the owner was looking for something inthe garage) snapped at us.. left a nice bite mark 27-Jul-19 11:35 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/DSC_0492-23218.jpg 27-Jul-19 11:35 AM our appointment was like 5 mins away 27-Jul-19 11:35 AM we were 4 houses away from it, too 27-Jul-19 11:35 AM they shaved it back and cleaned it up 27-Jul-19 11:35 AM sucks that mean dogs exist, and owners suck 28-Jul-19 11:01 AM it looks a bit better today, it actually swelled up some last night, but medicine + sleep made it better 28-Jul-19 11:01 AM but yeah, sucky overall 30-Jul-19 08:27 AM Ahh, I'm finally back 30-Jul-19 08:27 AM from wednesday til monday I was at a hacker meetup, it was so much fun 30-Jul-19 08:27 AM so much great new stuff, so many new people 30-Jul-19 08:27 AM I got like 5 x-ray tubes and a matching transformer :3 30-Jul-19 08:27 AM I don't have any data on it, but it looks like 70 kV 30-Jul-19 08:27 AM and a tiny little image intensifier, but I don't know what generation 30-Jul-19 08:27 AM maybe, finally it is time to build an xrf setup 30-Jul-19 12:54 PM oooo 30-Jul-19 12:54 PM nice :D 30-Jul-19 12:55 PM yep! 30-Jul-19 12:55 PM and I held a small talk about all kinds of radiation detectors 30-Jul-19 12:55 PM and I might have some contacts at desy, a nuclear physics lab with lots of accelerators here in germany 30-Jul-19 12:55 PM and and and 30-Jul-19 12:55 PM it was great 30-Jul-19 02:16 PM oh and also 30-Jul-19 02:16 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20190730_231425-DEC9E.jpg 30-Jul-19 02:16 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20190730_231154-4A0D2.jpg 30-Jul-19 02:16 PM Apparently they're for induction heaters 30-Jul-19 04:00 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20190730_232603-71F2D.jpg 30-Jul-19 04:00 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20190730_232852-8EC9F.jpg 30-Jul-19 04:00 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20190730_232902-B9097.jpg 30-Jul-19 04:00 PM can anyone find any data on that tube? 30-Jul-19 04:00 PM the weird anode structure and integrated filter are throwing me off 30-Jul-19 05:37 PM Directed x ray tube I believe 31-Jul-19 01:32 AM hmm 31-Jul-19 01:32 AM that would make sense 31-Jul-19 01:32 AM but why the filter? 31-Jul-19 01:32 AM the metal looks like Be 31-Jul-19 01:32 AM this tube seems to be for a dental x-ray, so I'd assume there's some tungsten in there 31-Jul-19 01:32 AM and I don't see the point of a Be filter behind a tungsten anode 31-Jul-19 01:50 AM I bought an RGA! (And what I hope is a compatible power supply)... Total around $310 31-Jul-19 01:50 AM sweet, congrats! 31-Jul-19 01:50 AM Condition is unknown, so I could just be in for a teardown 31-Jul-19 01:50 AM Also to test, I'm a bit unsure of whether I want to crack open my FIB case 31-Jul-19 01:50 AM Case/chamber 31-Jul-19 01:50 AM I'm a vacuum fitting virgin... Scared to break anything (especially the excellent vacuum my FIB achieves) 31-Jul-19 01:52 AM hehe, I know that feeling 31-Jul-19 01:52 AM but you have to, some day 31-Jul-19 01:52 AM so just get it over with 31-Jul-19 01:52 AM My SEM ( which adam suggested might have a vacuum leak) seems to have a free port blocked off of the column... 31-Jul-19 01:52 AM So maybe I can try connecting there 31-Jul-19 01:52 AM Which means I need to get the SEM working, at least partly 31-Jul-19 01:52 AM But that's been a goal anyway 31-Jul-19 01:52 AM Also finding documentation for the RGA is going to be a challenge of it's own 31-Jul-19 01:56 AM what model is it? 31-Jul-19 01:56 AM 'transpector tc100 filetype:pdf' turns up seemingly nothing of use, though i guess I'll go through all 9 results tomorrow 31-Jul-19 01:56 AM https://www.ebay.com/itm/LEYBOLD-INFICON-TRANSPECTOR-2-TSPTT100-RESIDUAL-GAS-ANALYZER-T7-E17-/183446692654 31-Jul-19 01:57 AM oh, a leybold 31-Jul-19 01:57 AM just contact them 31-Jul-19 01:58 AM https://www.ebay.com/itm/LEYBOLD-INFICON-TSP-TC100-TRANSPECTOR-RESIDUAL-GAS-ANALYZER-/264411385594 31-Jul-19 01:58 AM they've got great service and have datasheets / manuals on all the old stuff 31-Jul-19 01:58 AM It's actually that link 31-Jul-19 01:58 AM Oh, cool, awesome 31-Jul-19 01:58 AM Just sent a message requesting docs and software to Inficon 31-Jul-19 02:02 AM good luck! 31-Jul-19 02:03 AM Thanks, gotta sleep now! 31-Jul-19 02:03 AM good night ^^ 31-Jul-19 11:50 PM that's the same rga i have @nmz787 31-Jul-19 11:50 PM there is at least one kinda software that works with it called 'tware32' and it's a terribly janky windows 95-era app that does Not care for usb-serial dongles 31-Jul-19 11:50 PM but it can speak rs232 or rs485 31-Jul-19 11:50 PM and takes 24vdc input 31-Jul-19 11:50 PM my experience with it thusfar has been.. temperamental 31-Jul-19 11:50 PM but yeah ping me if you have any questions :3 01-Aug-19 12:54 AM Ooo sweet, ok, awesome! Thanks!! 01-Aug-19 08:46 PM one last homework for first year, next week 02-Aug-19 09:34 AM I did homework all day yesterday until class in the late afternoon 02-Aug-19 09:34 AM One left myself too 02-Aug-19 09:34 AM Test next week and final exam in two weeks 03-Aug-19 08:30 PM is it a bad idea to chase threads with a threadforming tap? some people on the internet claim it can weaken the threads and that you should use a special thread chaser but I'm kind of skeptical (just strikes me as potential superstition) 03-Aug-19 08:54 PM depending on the tap, it could make them loose 03-Aug-19 08:54 PM if it's a big enough bolt, it won't weaken it beyond spec 03-Aug-19 08:59 PM it's 3/8" national fine (24 threads per inch) 03-Aug-19 08:59 PM I tried it on one of the threaded holes in my cold trap (I figured it was not a big risk, because there are 24 of these holes) and it didn't seem to take any metal out 03-Aug-19 09:00 PM then it's probably machined slightly oversize 03-Aug-19 09:00 PM that should be normal, to ensure there's no binding 04-Aug-19 09:10 PM google translate says in German, 'Schwere' is 'severity' as well as 'vision' on the phone app - which has come up very often.. my watchmaking term handbook thing says it is Gravity.. which makes 110% more sense 04-Aug-19 09:18 PM schwerpunkt = focus? ... no... center 04-Aug-19 09:18 PM possibly..... center of gravity 04-Aug-19 09:18 PM wow, this is going to take a while 04-Aug-19 09:33 PM Dictionnaire professionnel illustré de l'horlogerie is what I am using, fyi 05-Aug-19 04:32 PM That looks French as far as the title goes with the "l'h" prefix 05-Aug-19 07:59 PM it is a multi language reference.. just the title is in french 05-Aug-19 07:59 PM french, german, english, spanish 07-Aug-19 12:34 PM @qualia (or others) do you need a turbo or ion pump after/near the rga ionizer? Or since you're in molecular flow regime, it doesn't matter (presumably the rga acts like an ion pump, smashing gas into the detector and plating it there??) 07-Aug-19 12:34 PM Just wondering if I can even get away with just trying to bolt the RGA onto my SEM open port, or if I need another pump too on that plumbing 07-Aug-19 12:37 PM You can bolt an RGA onto a SEM 07-Aug-19 12:41 PM Sure, but I've seen some setups (not necessarily on a SEM) where there's a tiny turbo right next to the RGA 07-Aug-19 12:41 PM That might be for systems that are running at higher pressure than the rga will work at, I guess 07-Aug-19 12:43 PM Yeah maybe environmental sems 07-Aug-19 12:53 PM I'd guess deposition or etch stuff 07-Aug-19 12:53 PM Stuff using plasma 07-Aug-19 01:10 PM the RGA needs to be operated at at least 10^-5 torr or lower or you'll frag your filament 07-Aug-19 01:10 PM so if you want to monitor a process at a higher pressure, you need to have some kind of differential pumping scheme 07-Aug-19 01:10 PM i have no idea how much pumping capacity an RGA presents but i can't imagine it's a lot 07-Aug-19 01:10 PM if your SEM column operates at those pressures or lower where you want to stick it on, then, yeah, you can do that. be wary of any stray magnetic fields, and i'd be worried about the field gradients around the RGA potentially messing up alignment 07-Aug-19 01:10 PM i usually see RGAs mounted onto a tee which may usually be for a turbo but in my case since i want to measure neutral reaction byproducts after an energetic process i'm mounting it out of the line of sight of my reaction vessel 07-Aug-19 01:10 PM the transpector tsp100 does have some kind of integrated pressure measurement mechanism so it will error out if your pressure is too high, but i'd double check with some other sort of gauge to be certain 07-Aug-19 01:16 PM RGA arrived... Looks OK but exterior has some unsettling rust... 07-Aug-19 01:16 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20190807_131512-8D31F.jpg 07-Aug-19 01:17 PM mine had super rusted hardware for some reason too 07-Aug-19 01:17 PM all the screws were gross as heck, i threw 'em in the ultrasonicator and they came right clean tho 07-Aug-19 01:17 PM Huh, ok 07-Aug-19 01:17 PM dunno lol 07-Aug-19 01:17 PM i pulled it open and inspected all the cards inside and they looked ok, too, just to be sure 07-Aug-19 01:20 PM Yeah will do 07-Aug-19 01:20 PM Heading to M&M 2019 now! Vendor area anyway 07-Aug-19 01:21 PM sounds like fun :D o/ 07-Aug-19 01:21 PM is headed into work, in theory 07-Aug-19 02:16 PM Jeez... can't imagine the enviroment those RGAs were in to look like that.. 07-Aug-19 02:16 PM @nmz787 Did you get one of those ones on eBay? 07-Aug-19 04:17 PM Built a nixie tube clock! 07-Aug-19 04:17 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_2175-8100B.JPG 07-Aug-19 04:23 PM That's neat! 07-Aug-19 04:23 PM Though, am I the only one who thinks that blue backlighting on nixie clocks is sacrilege? 07-Aug-19 04:26 PM I dig it. It's like an unholy marriage of old and new technology. 07-Aug-19 05:01 PM @Conmega yep! 07-Aug-19 05:01 PM @Conmega $250 with shipping, $50 for a seemingly compatible power supply 07-Aug-19 05:23 PM the blue+orange is an awesome contrast 07-Aug-19 06:11 PM I need to make nitrogen or argon nixies 07-Aug-19 06:11 PM Though that'd be... aixies or... nixies, hehe 07-Aug-19 08:11 PM I have so many nixie tubes I need to play with 07-Aug-19 08:11 PM I also have 9 of those green/orange 64x64 nixie panels... 07-Aug-19 08:11 PM I was going to make a 3x3 grid which is just a bit more than enough resolution for a gameboy hehe... 07-Aug-19 08:11 PM Problem is driving those things.... its like 400V so the chips are EXPENSIVE 07-Aug-19 08:21 PM Multiplexing! 07-Aug-19 08:21 PM But yes 07-Aug-19 08:33 PM Concato de Salmón 07-Aug-19 08:33 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/DSC_0512-16E85.jpg 07-Aug-19 08:33 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/DSC_0513-12C8B.jpg 07-Aug-19 09:09 PM What happens if you expose it to a vacuum? 07-Aug-19 09:12 PM the vacuum of my mouth 07-Aug-19 11:16 PM jom 07-Aug-19 11:16 PM nom 08-Aug-19 07:57 PM just put a bunch of pillowcases and sheets in a bucket full of 15% acetic acid solution to soften them 08-Aug-19 07:57 PM I tried it once before with a 5% acetic acid solution (aka normal vinegar) and I didn't really think it worked but my girlfriend swears it did 09-Aug-19 08:47 AM Sounds like a way to smell up your sheets 09-Aug-19 09:41 AM I think if it does work it's by converting some of the cellulose to cellulose acetate (which is actually used in fabrics) 09-Aug-19 09:55 AM @nmz787 seems unlikely, given the solubility of acetic acid in water. the only things that stay smelly after a trip through the wash are insoluble volatile compounds 09-Aug-19 09:57 AM I generally hate vinegar smell/taste 09-Aug-19 10:01 AM I mean, I tried it before with the 5% and it didn't smell, so I'm pretty confident it still won't smell 10-Aug-19 07:41 AM has anyone here got a vapor pressure diagram hydrogen? 10-Aug-19 07:41 AM from ~50 to 200 k 10-Aug-19 07:41 AM my coldhead as a hydrogen thermometer inside, but the gauge is missing and I have no idea what pressure range to look for 10-Aug-19 06:16 PM this is a great blog http://toughsf.blogspot.com/2019/04/nuclear-reactor-lasers-from-fission-to.html 10-Aug-19 10:39 PM https://imgur.com/a/vEhSa6k 11-Aug-19 08:22 AM machine guns or whatever 11-Aug-19 04:54 PM https://i.spirit.re/i4xSQ.png 11-Aug-19 04:54 PM I see you @qualia 11-Aug-19 04:54 PM I bet you're excited for my complete lack of tweets 12-Aug-19 12:05 AM I thought you didn't have Twitter? 12-Aug-19 10:06 AM I do! 12-Aug-19 10:06 AM But my trick is not posting anything, so nobody notices. 12-Aug-19 10:18 AM Oh hey this would have been the perfect place to ask that question I had a few days ago 12-Aug-19 10:18 AM No longer important - the exam has been taken - but do I understand correctly that n-channel FETs have low resistance across Source and Drain if the Potential at Gate is higher than, and the difference to the Potential at Bulk is greater than the Uth, the threshhold voltage, and for p-channel FETs the only difference is that the Potential at Gate needs to be lower than the Potential at Bulk? 12-Aug-19 10:25 AM This goes in #semiconductor 12-Aug-19 10:25 AM And yes I believe so 12-Aug-19 10:26 AM Cool. 12-Aug-19 10:26 AM All the wiki stuff assumed encapsulated components and only mentioned Gate-Source-Voltage, but my prof thought it was fun to put a few integrated logic gate schematics in the lecture-slides 12-Aug-19 10:26 AM and never clarified whether it was meant as a fun aside or relevant in the exam 12-Aug-19 10:26 AM turned out to not be, but that 68000 Assembly intro was... 12-Aug-19 04:48 PM Heheh Talked to a friend at a local university about vacuum stuff 12-Aug-19 04:48 PM Got myself a NOS & NIB rotary feedthru 12-Aug-19 04:48 PM And learned that they had a month prior cleaned out a storage room of vacuum stuff :XXXXXX 12-Aug-19 04:48 PM But the dude who got most of it is a mutual acquaintance, so all is hopefully not lost. 12-Aug-19 06:43 PM @Deleted User do your worst >:3 12-Aug-19 06:43 PM all the better to pay attention when you do post 12-Aug-19 06:46 PM true 13-Aug-19 07:28 PM thoguht of a container for cleaning medium sized dirty parts.. a cooler, with a spigot at the bottom to drain it all 13-Aug-19 07:55 PM "Spy Drama" is a movie genre... what other Spy-type genres exist? 13-Aug-19 11:54 PM Spy Comedy 14-Aug-19 12:05 AM 'The man who knew to little' and 'Austin Powers' come to mind 14-Aug-19 08:34 AM oh gawd what have I done 14-Aug-19 08:34 AM I found a guy on our version of craigslist selling a tiny dewar 14-Aug-19 08:34 AM an on my way back home with 10 or 20 kg of glassware... >.< 14-Aug-19 08:35 AM Ooh~ 14-Aug-19 08:36 AM guess I gotta get into chemistry now 14-Aug-19 08:39 AM It's a lot of fun, even if you're just doing really simple stuff. I only stopped when I broke my last flat bottom flask with heat stress 14-Aug-19 08:39 AM What kind of money did you spend, and are there pictures? 14-Aug-19 08:49 AM pics will come tomorrow 14-Aug-19 08:49 AM and it was 150 in total, ~3 bucks per piece 14-Aug-19 08:53 AM a steal, depending on what you got 14-Aug-19 08:55 AM maybe 200 strips of PH paper, 300 filterpapers, many valves, small beakers, round flasks, a dewar, some erlenmeyers 14-Aug-19 08:56 AM Sounds good. I was going to say: if it's all round bottom flasks, then you got ripped off 14-Aug-19 08:56 AM actually very few of the flasks 14-Aug-19 01:04 PM @Noxz @leona Spy Hard was a spoof of Die Hard 14-Aug-19 01:10 PM Spy Spoofs! Of course! 14-Aug-19 01:10 PM Austin Powers 14-Aug-19 01:51 PM @qualia "The TC100 that you have is too old to work with TWare32 software.  Sorry, but we do not have software available for you.  TranspectorWare (I am told) is the name of the software that was used for this RGA, but we do not have copies to sell and not sure it would even work with today's operating systems." 14-Aug-19 01:51 PM Sooo, I guess that means I need to work out the ion spectra to molecular source matching myself??? 14-Aug-19 02:13 PM sec 14-Aug-19 02:13 PM http://i-support.sakura.ne.jp/Software/ -- try TWare32 v2.85.zip. you'll need an actual hardware serial port, usb-serial dongles seem suuuper unreliable 14-Aug-19 02:13 PM it runs for me quite OK under Wine if you're trying to make it work under Linux 14-Aug-19 02:13 PM but, i mean, by all means, build your own quadrupole driver if you want, too :) 14-Aug-19 02:13 PM I think I have a PDF for the C100M series in particular 14-Aug-19 02:13 PM somewhere at home 14-Aug-19 02:13 PM guess it didn't make it into my pdf library yet 14-Aug-19 02:13 PM cc @nmz787 14-Aug-19 02:18 PM I want an RGA to play with 14-Aug-19 02:18 PM there's, like, two of you here. is the other nmz a dead account? can i kick it so i can tab-complete your name? >.> 14-Aug-19 02:18 PM But I still haven't built the vacuum chamber 14-Aug-19 02:19 PM one step at a time :D 14-Aug-19 02:19 PM . o O (i say, being extremely bad at taking one step at a time, myself..) 14-Aug-19 02:19 PM My approach is closer to "as many steps at a time as I can afford" 14-Aug-19 02:20 PM snrk, yeah 14-Aug-19 02:20 PM There's a TC100 for $380 including shipping 14-Aug-19 02:20 PM with the quadrupole and CF flange 14-Aug-19 02:20 PM They sent me a pdf manual! 14-Aug-19 02:20 PM oh nice :o 14-Aug-19 02:21 PM I'm not sure why there'd be two of me in here... 14-Aug-19 02:21 PM Maybe something about how i signed in once? 14-Aug-19 02:21 PM oh maybe 14-Aug-19 02:21 PM there's @nmz787 and @nmz787 14-Aug-19 02:21 PM also discord is having a lot of trouble getting my messages through, for some reason 14-Aug-19 02:22 PM same here 14-Aug-19 02:22 PM it's dying a bit 14-Aug-19 02:25 PM also if you do use linux i've had the best results running tware under multiarch wine like this: WINEARCH=win32 WINEPREFIX=~/.wine_tware32_2.85 wine ~/.wine_tware32_2.85/drive_c/TWare32/Bin/TWare32.exe 14-Aug-19 02:26 PM Cool, yeah I'm primarily a Linux person 14-Aug-19 02:26 PM i think before anything i did winecfg and set the os type to windows 95, also 14-Aug-19 02:26 PM with all those same env bits ofc 14-Aug-19 02:28 PM Afaik the driver to the hardware is the easy part compared to the spectrum matching 14-Aug-19 02:28 PM At least from what I've done with other spectroscopy 14-Aug-19 02:29 PM yeah that'd make sense 14-Aug-19 02:29 PM there's a calibration guide somewhere in the manual using dry nitrogen 14-Aug-19 02:33 PM @Deleted User i paid $200 +$50 shipping, then another $50 for a power supply 14-Aug-19 02:33 PM that's not too bad 14-Aug-19 02:33 PM No idea if it's in working condition 14-Aug-19 02:39 PM mine was $180 + $20 for replacement ceramics + ~$30 for a mean well power supply (which is also being used for other devices, admittedly) 14-Aug-19 02:39 PM plus six months of agonizing about how to replace said ceramics 14-Aug-19 02:39 PM Can they be hacked to run a higher amu range? 14-Aug-19 02:39 PM (turns out, it was neither hard nor terribly difficult, just cost me the indefinite financial burden of making a mcmaster acct..) 14-Aug-19 02:39 PM Most are 100 or 200 amu 14-Aug-19 02:40 PM i don't believe so, it's a function of the physical geometry of the quadrupole tmk 14-Aug-19 02:40 PM I thought it was more of an amplitude thing 14-Aug-19 02:40 PM But I'd be using it for leak detection instead of a dedicated helium mass spec 14-Aug-19 02:40 PM So I guess 100 amu is all I need 14-Aug-19 02:41 PM yeah tbh 14-Aug-19 02:41 PM In just 2-3 weeks I will know if I will get a huge batch of scrap equipment for free 14-Aug-19 02:41 PM It'll cost me over $200 to ship 14-Aug-19 02:41 PM There will probably be a full high vacuum system in there with a turbo 14-Aug-19 02:43 PM my ideal RGA would be one of the 50 AMU ones with the, like, hyperfine resolution that lets you discriminate between e.g. 3He and T 14-Aug-19 02:43 PM sighs dreamily.. 14-Aug-19 02:44 PM You could hijack the analog signals 14-Aug-19 02:44 PM 50 < 100 14-Aug-19 02:44 PM Strap an FPGA in there with a 16b some-many-megsamples/s ADC in there 14-Aug-19 02:44 PM And an equally high res DAC for sweeping 14-Aug-19 02:45 PM iirc @a_quiet_scientist linked it at me/in here once 14-Aug-19 02:45 PM i forget how it did what it does 14-Aug-19 02:45 PM i think it was a tandem quadrupole 14-Aug-19 02:45 PM 3.0160293 u vs 3.0160492 u, nbd 14-Aug-19 02:47 PM only 4 lsd 14-Aug-19 02:47 PM child's play really /s 15-Aug-19 05:15 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/photo_2019-08-15_14-15-28-60BB7.jpg 15-Aug-19 05:15 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/photo_2019-08-15_14-15-25-8E877.jpg 15-Aug-19 05:15 AM @Leona this and a lot of filter paper, PH paper and some cuvettes for optics 15-Aug-19 05:15 AM on restrospect I don't think it was as good a deal as I hoped, but still not too bad 15-Aug-19 05:19 AM Not a lot of ground glassware. Lots of beakers though! 15-Aug-19 05:19 AM and good bottles 15-Aug-19 05:19 AM and two port round bottom flasks 15-Aug-19 05:20 AM (Or rather not too many options with what you have in ground glassware) 15-Aug-19 05:20 AM yep 15-Aug-19 05:24 AM Seems like you got an assortment of gas ports? 15-Aug-19 05:25 AM some, yes 15-Aug-19 05:25 AM But they don't fit the two-neck… 15-Aug-19 05:28 AM don't they? 15-Aug-19 05:28 AM can't test, they're in the washing machine atm 15-Aug-19 05:28 AM Looks like different dias 15-Aug-19 05:28 AM I don't know if putting corc or rubber stoppers in ground necks is a bad idea (soot/unreliable) or just wasted potential, but I assume you'll find out 15-Aug-19 07:36 AM Ground joints and stoppers kind of work against each other. Different purposes. 15-Aug-19 01:04 PM I would have just hoarded those bluecap bottles. Always felt they ware too expensive for my taste. 15-Aug-19 01:04 PM I have a modest amount of surplus and chinese labglass 15-Aug-19 01:04 PM ground joints stuff is 24/29, as that's the most used one in europe. 15-Aug-19 01:04 PM Never really done anything except distilled some water with those. I mainly jut wanted the capability (and to feed the sqeeing internal 15year old me as I finaly have ground glass glass ware) to distil solvents and acids if needed. 15-Aug-19 01:08 PM I somehow got into possession of such when I literally was an internally squeeing ~15 year old 15-Aug-19 01:30 PM Did not have the budget or connections back then, and ebay stuff direct from china was not as cheap back then. 15-Aug-19 11:41 PM i like lab glass .. also, bed time.. last day of school till the next year starts is tomorrow, the graduation ceremony for 2nd year students 15-Aug-19 11:41 PM also, I think 99% of my ground glass is 24/40 15-Aug-19 11:41 PM I used rubber septums a bit, for inert transfers 15-Aug-19 11:41 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/DSC_2111-9AEF2.jpg 15-Aug-19 11:41 PM I found out I loved shlenk manifolds 15-Aug-19 11:41 PM able to switch between vaccum and inert (I used Argon).. then back and forth a few times to really purge stuff 15-Aug-19 11:41 PM anyways, bed time... 16-Aug-19 01:55 AM no switchplates 16-Aug-19 05:35 AM oh.. also wearing gloves all the time, so no worries 16-Aug-19 05:35 AM the redesign of t he fumehood will have them enclosed a bit better, but ti worked fine 16-Aug-19 05:35 AM in the end they wer just extension cords spliced 16-Aug-19 06:32 AM Looks like an interesting setup though. The gas manifold just provides positive pressure in this one? 16-Aug-19 06:41 AM Nvm, I think I got it. 16-Aug-19 06:50 AM the single valve handle switches between none, argon gas, or vacuum 16-Aug-19 06:50 AM hard to see how it works from that pic, but just lookup shlenk manifold and it should be more apparent 16-Aug-19 07:14 AM Yeah, I tried to be smart and to read about it in German, but Wikipedia (as usual) mapped it to a different topic and confused me. (Schlenk-technique instead of -manifold) 16-Aug-19 07:29 AM i just imagined alternating implosions and stoppers shooting everywhere... :-D 16-Aug-19 11:29 AM That's why you keep the doors of a fumehood closed 16-Aug-19 12:38 PM "blast shield" is what I call them 16-Aug-19 12:38 PM "sash" I think is a technical term 16-Aug-19 12:38 PM mine are made of polycarbonate 16-Aug-19 12:38 PM with counterweights on that red line 16-Aug-19 12:38 PM which is epoxy coated steel wire 16-Aug-19 07:13 PM Documentation including construction guidelines, and friendly lifetime tech support will be provided. "Lifetime" is defined as either yours, or however long you remain interested in stabilized HeNe lasers, but is assumed to terminate sometime before the Universe ends. 16-Aug-19 07:14 PM Heh, where's that from? Sam's? 16-Aug-19 07:19 PM this kit.. https://www.ebay.com/itm/DIY-Interferometer-Displacement-Measurement-System-Kit-Laser-Controller-Display/302773262693 16-Aug-19 07:19 PM yup... 'sam' at the bottom 16-Aug-19 07:19 PM who is 'sam' ? 16-Aug-19 07:19 PM apparently of https://www.repairfaq.org/ 16-Aug-19 07:44 PM yeah, he's a HeNe guy 16-Aug-19 07:46 PM I don't know enough about LASERs 16-Aug-19 07:46 PM enough to capitalize it.. 16-Aug-19 07:47 PM you squeeze photons into a place tight enough that they become uncomfortable and start burning things 16-Aug-19 07:47 PM ... right 16-Aug-19 09:16 PM oh neat, he put a whole kit together 16-Aug-19 09:16 PM i've had my eyes on his rather cheaper kit of two mirrors and a piezo transducer with a hole drilled in it, for a while now 16-Aug-19 09:16 PM first i should probably get my HeNe tube to, like.. lase 16-Aug-19 09:22 PM I once had the chance to buy a gigantic 26mW 1m-long HeNe laser for cheap 16-Aug-19 09:22 PM There's now a 26mW 1m-long HeNe laser under my bed 16-Aug-19 09:22 PM It works too! 16-Aug-19 09:22 PM Pulls 100W, outputs a whopping 26mW 16-Aug-19 09:22 PM I also have two other henes, but no PSU, and they might have lost their fill a long time ago 17-Aug-19 03:20 AM ooh 17-Aug-19 03:20 AM i just sorta want to experiment with modelocking and frequency references 17-Aug-19 03:20 AM more stability than pew pew power 17-Aug-19 03:20 AM i bought a 50mW green laser 'pointer' once on a lark and it is still one of the more dangerous and questionable things i own 17-Aug-19 11:14 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/unknown-1BB6D.png 17-Aug-19 11:14 AM today someone at my local scrapyard has shown me that im actually a responsible person 17-Aug-19 11:27 AM Hah. That's certainly a creative way to haul stuff. 17-Aug-19 12:57 PM yeah, kinda looking at utilizing interferrometers for some positioning of machinery (DRO, basically).. but not looking at $500 per axis.. would rather source everything myself, but just a neat description 17-Aug-19 12:57 PM it's not worth it to use interferometers as DROs 17-Aug-19 12:57 PM just get some super high quality magnetic linear scales 17-Aug-19 12:58 PM not worth it - how 17-Aug-19 12:58 PM extreme price 17-Aug-19 12:58 PM extreme sensitivity 17-Aug-19 12:58 PM they would mainly be used for one machine, a jig borer 17-Aug-19 12:58 PM walking around the machine will throw the readings off 17-Aug-19 12:58 PM not like a milling machine 17-Aug-19 12:58 PM magnetic linear scales can get down to single-digit nanometer resolution 17-Aug-19 12:58 PM yes like a milling machine 17-Aug-19 12:58 PM to an interferometer, it's all jell-o 17-Aug-19 12:59 PM well, what I mean is that a jig borer is designed a bit diff than a standard milling machine 17-Aug-19 12:59 PM preload is double, etc 17-Aug-19 12:59 PM yeah, still jello 17-Aug-19 12:59 PM meh, I suppose 17-Aug-19 12:59 PM unless it's a complete temperature stabilized, vibration isolated machine built out of granite composite, floating on air bearings, an interferometer won't benefit you 17-Aug-19 12:59 PM https://www.machine-dro.co.uk/high-accuracy-magnetic-linear-tape.html 17-Aug-19 01:01 PM the company made jig borers and measuring machines with interferrometers 17-Aug-19 01:01 PM https://www.machine-dro.co.uk/magnetic-linear-encoder-reading-head-1-micron-resolution.html 17-Aug-19 01:01 PM that tape 17-Aug-19 01:01 PM plus that encoder 17-Aug-19 01:01 PM that's all you need 17-Aug-19 01:02 PM why not just average out the interferometer reading? 17-Aug-19 01:02 PM yeah, I looke dinto magnetic tape based stuff a while ago.. what's nice about them is no dust/oil does anything 17-Aug-19 01:02 PM because it's an absolute reading 17-Aug-19 01:02 PM error = immediate drift 17-Aug-19 01:02 PM this was one of the company's products.. https://www.ebay.com/itm/Societe-Genevoise-SIP-Trioptic-1003-Universal-Measuring-Machine-Interferometer/181968244685 17-Aug-19 01:02 PM yeah, that's a measuring machine 17-Aug-19 01:02 PM 0 load 17-Aug-19 01:02 PM they had other types with them though 17-Aug-19 01:03 PM point is, interferometers are bulky and expensive and unnecessary 17-Aug-19 01:03 PM if you need more than 1 micron of precision, you're really not doing anything practical 17-Aug-19 01:03 PM can they be small? I know ben (applied science) showed a form using a single photodiode w/ feedback 17-Aug-19 01:03 PM nope 17-Aug-19 01:03 PM his video is a nice trick 17-Aug-19 01:04 PM 1 micron should be plenty for current application, but also 'minimal' 17-Aug-19 01:04 PM but they're generally rather large 17-Aug-19 01:04 PM the large part is the laser itself? 17-Aug-19 01:04 PM unless you're going for super high end, modern, mode-locked, stabilized lasers and precision optics, old stuff will be huge 17-Aug-19 01:04 PM hrm 17-Aug-19 01:04 PM temperature stabilized HeNe lasers are the cheapest and easiest way to do this 17-Aug-19 01:04 PM put some volts across a tube, you get glowy, make that glowy constantly hot, you get stable glowy 17-Aug-19 01:30 PM in voice chat I actually brought up DIY magnetic scales a few times 17-Aug-19 01:35 PM DIY is a bit of a silly idea 17-Aug-19 01:35 PM using an off-the-shelf reader chip and putting it on your own board isn't though 17-Aug-19 01:35 PM that's fine 17-Aug-19 01:36 PM the concept was to use a HiFi cassette deck recorder 17-Aug-19 01:36 PM naw 17-Aug-19 01:36 PM it's been driven over and over 17-Aug-19 01:36 PM super DIY 17-Aug-19 01:36 PM yeah, people tried 17-Aug-19 01:36 PM the got a resolution of "yeah just about" 17-Aug-19 01:36 PM the all-in-one linear and rotary encoder chips are like $8 17-Aug-19 01:36 PM you give them power and they speak i2c or spi or quadrature 17-Aug-19 01:37 PM there was an idea of doing 4+ quadrature (instead of just 2) tracks to gain better res 17-Aug-19 01:37 PM oh, you mean on actual tape? 17-Aug-19 01:37 PM forget it, it flexes to hell 17-Aug-19 01:37 PM yes 17-Aug-19 01:37 PM right 17-Aug-19 01:37 PM you'll lose millimeters per run 17-Aug-19 01:37 PM the temperature constant isnt good 17-Aug-19 01:37 PM it's also just springy 17-Aug-19 01:38 PM right, well.. what if it was pre-mounted? 17-Aug-19 01:38 PM or rather, what if you made your own tape 17-Aug-19 01:38 PM what's the point 17-Aug-19 01:38 PM on some invar or something 17-Aug-19 01:38 PM real 1-micron tape is better and isn't much expensive 17-Aug-19 01:38 PM hah, DIY i guess is the point 17-Aug-19 01:38 PM "I Did It!" 17-Aug-19 01:38 PM DIY doesn't really work when a printer encoder is more accurate than DIY magnetic 17-Aug-19 01:38 PM and that stuff is built down to a price 17-Aug-19 01:38 PM hah, right 17-Aug-19 01:39 PM now if you manage to build a DIY linear servo... 17-Aug-19 01:39 PM that'd be one heck of an accomplishment 17-Aug-19 01:39 PM well.. I have some Newport piezo stages 17-Aug-19 01:39 PM some = 8? AG-LS25 17-Aug-19 01:39 PM linear servo as in, an actual 3-phase linear servo 17-Aug-19 01:40 PM if I ever need more than 25mm of travel.. 17-Aug-19 01:40 PM I had taken one apart to show the internals at one point, just one piezo and a compliant 'arm'/finger that will push or pull 17-Aug-19 01:40 PM I dont want/need CNC for this "main" project though 17-Aug-19 01:40 PM I am still not sure what the end goal will be 17-Aug-19 01:40 PM beyond DRO for a few machines 17-Aug-19 01:41 PM https://www.youtube.com/watch?v=fa2f-4S_sys 17-Aug-19 01:41 PM this is voodoo magic 17-Aug-19 01:41 PM planar linear servos 17-Aug-19 01:42 PM how are they stuck up there 17-Aug-19 01:42 PM magnets. 17-Aug-19 01:42 PM thought so 17-Aug-19 01:42 PM https://www.youtube.com/watch?v=cw_F3CwUM7Q 17-Aug-19 01:42 PM planar steppers exist too! 17-Aug-19 01:42 PM air bearings and magnets 17-Aug-19 01:42 PM and somehow they're closed loop 17-Aug-19 01:43 PM yeah, my piezos are open, and basically state that they can easily miss steps 17-Aug-19 01:47 PM I have two linear steppers I picked up forever ago 17-Aug-19 01:47 PM They're terrifyingly fast 17-Aug-19 01:54 PM my piezos are commically slow 17-Aug-19 01:54 PM 50nm steps though 17-Aug-19 01:54 PM would be great for superresolution die shots 17-Aug-19 01:54 PM once I get to that point 17-Aug-19 01:54 PM still in machining mode 17-Aug-19 02:27 PM I have my lathe set up 17-Aug-19 02:27 PM so I've started machining parts 17-Aug-19 02:27 PM https://i.spirit.re/GxMXM.jpg 17-Aug-19 02:27 PM Made a tiny adapter to put MAPP gas into my Smiths Little torch 17-Aug-19 02:27 PM I really like this new lathe. I don't have to put in effort to get nice surface finishes. 17-Aug-19 02:27 PM It's as if it's new and not worn out... 17-Aug-19 02:29 PM the cutting tool itself also plays a big role 17-Aug-19 02:29 PM Cheap noname carbide insert tooling ftw! 17-Aug-19 02:29 PM also, I am still relatively new to it all.. havent had my bigger lathe more than 4mo or so 17-Aug-19 02:29 PM Buy carbide. 17-Aug-19 02:29 PM Forget HSS 17-Aug-19 02:30 PM yeah, well, tuesday I am getting a tool and cutter grinder.. 17-Aug-19 02:30 PM and didnt want to get into carbide until I had means of sharpening 17-Aug-19 02:30 PM Buy a set of holders and inserts from China 17-Aug-19 02:30 PM yeah, meh 17-Aug-19 02:30 PM $60 for a full set of everything + $50 for a holder/tool post 17-Aug-19 02:30 PM right 17-Aug-19 02:30 PM enough to practice grinding on 17-Aug-19 02:31 PM yup 17-Aug-19 04:14 PM On the topic of linear motors, I have some Aerotech stuff.... 17-Aug-19 04:14 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_1533-82ECB.m4v 17-Aug-19 04:24 PM Yep, that's a linear servo alright 17-Aug-19 04:24 PM And a Staubli bot! 17-Aug-19 04:24 PM For fun or work? 17-Aug-19 04:24 PM I have a 2 axis linear motor stage too 17-Aug-19 04:24 PM My personal lab. Intent is for entrepreneurial activities, but the economics look more like a hobby lab... 17-Aug-19 04:27 PM Would you by any chance be experienced in C++? :P 17-Aug-19 04:31 PM Nope, C on microcontrollers is as far as I go. 17-Aug-19 04:36 PM Aw 17-Aug-19 04:36 PM I'm looking for an experienced C++ developer to hire for a robotics project that I can't handle myself 17-Aug-19 04:36 PM Robotics as in, software for 6-axis bots 17-Aug-19 04:48 PM If anyone in here is that person, let me know 17-Aug-19 04:48 PM It's a really cool project and I actually have a budget for it, unlike my personal tinkering. 17-Aug-19 05:34 PM define: experienced 17-Aug-19 05:34 PM I've done C++ and Java for a while.. but I dont want to get into someone else's projects at this point 17-Aug-19 05:40 PM Enough to take on a project paying high 4 to low-mid 5 digits and see it to completion 17-Aug-19 05:40 PM Involves a bit of UI development, 3D and inverse kinematics(integrating existing libraries should work). 17-Aug-19 05:40 PM @Noxz 17-Aug-19 05:42 PM if only I had the time.. and motivation! 17-Aug-19 05:42 PM The project is at the technical design document stage at this point, though I have a few ideas in terms of architecture 17-Aug-19 05:42 PM The motivation is a lot of money 17-Aug-19 05:42 PM Time I cannot provide :< 17-Aug-19 05:43 PM I mean.. some people don't need the extra money at the instant it is offered 17-Aug-19 05:43 PM But you want it and your watchmaking project might need it :P 17-Aug-19 05:43 PM sure, it's nice, and even a necesity 17-Aug-19 05:43 PM hah, robots in my watchmaking project? I dont think so.. 17-Aug-19 05:43 PM Cam operated lathe may be the most automated I get 17-Aug-19 05:43 PM it's a marketing gimmick, really 17-Aug-19 05:43 PM no-CNC 17-Aug-19 05:43 PM k, going to the grocery store to buy a cooler to use as a wash bucket for vintage machinery/parts 17-Aug-19 06:12 PM I meant money 17-Aug-19 06:12 PM everyone wants money 17-Aug-19 06:21 PM well, it comes back to the issue if I have enough.. like, you are asking for me to work? and I kinda don't wanna, I am on vacation for a few weeks... soo... 17-Aug-19 06:21 PM but that's just me 17-Aug-19 06:31 PM if you're interested, let me know 17-Aug-19 06:31 PM otherwise it's fine 17-Aug-19 06:37 PM yeah, sorry to take it and run, but was trying to define 'experienced' and such 17-Aug-19 07:00 PM It's alright 17-Aug-19 07:00 PM I'm just looking for someone experienced enough to be confident that they can see a pretty big project through 18-Aug-19 12:05 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/unknown-37027.png 18-Aug-19 12:05 PM got to many soldering tips in convenient diameters? 18-Aug-19 02:19 PM What shell casing is that? 18-Aug-19 02:48 PM 38 18-Aug-19 02:48 PM so they should work in 9 and 357 as well 18-Aug-19 02:48 PM its even lead free 18-Aug-19 04:19 PM So whose sending a few to tfm so he can test them? 18-Aug-19 11:14 PM i think he only does 12 gauge 19-Aug-19 12:08 AM https://en.wikipedia.org/wiki/Radioactive_quackery 19-Aug-19 12:08 AM Quackery!! 19-Aug-19 12:08 AM k, bedtime 19-Aug-19 11:28 PM Ha. There you go. That’s what I should do with the stuff I have. Quack medicine! 19-Aug-19 11:28 PM On another subject all together. I feel this is a good place to float these thoughts given the technical nature of others here and that we all probably have some of the same tendencies in life being in our respective technical and scientific fields and studies. Do you ever find yourself pigeonholed by friends or colleagues to just the one thing you are known for? The feeling that based on what you do, others are closed to the idea that you can also do other non related things and probably have quite a bit of experience in what they are also doing but they are closed to the thought of you being alone to help them or converse constructively with them about those things? 19-Aug-19 11:28 PM I am in a situation now like that and it’s rather depressing. The though of is that how they really view me? Perhaps it’s time I focus more on how others perceive me, or is that a path to nonsense? 19-Aug-19 11:28 PM Difficult subjects. 20-Aug-19 01:08 PM <0xDBFB7#9254> @Deleted User out of curiosity, is that project still available? 20-Aug-19 01:10 PM which one? 20-Aug-19 01:10 PM <0xDBFB7#9254> inverse kinematics UI in C++ 20-Aug-19 01:10 PM Yes, still looking for someone 20-Aug-19 01:10 PM If seen to completion, this is a 5-figure project 20-Aug-19 01:10 PM So I'm open to talk about it in PM 21-Aug-19 07:48 AM @Deleted User What kind of GUI development software do you use for embedded MCUs (if any)? I've been working with STemWin but found the result quite unsatisfactory. Might try to use TouchGFX or Embedded Wizard instead 21-Aug-19 07:48 AM I'm trying to get a decent GUI for a STM32f4 board controlling everything related to my experiment 21-Aug-19 09:14 AM There are a ton of open source cross platform GUI libraries for C/C++/C#/whatever. So I would think choosing one of those and making your own code to talk to the micro over a comms, whether that be serial, usb over serial, whatever else I guess. Would be the best route, not quite drag and drop but probably going to give you the most control. 21-Aug-19 09:19 AM I'm mainly looking for something with a simulator on PC so I don't have to flash to the board each time I make a tiny change. Having drag and drop widgets just speeds up development so much though. This is not something I want to spend a lot of time on 21-Aug-19 09:19 AM I'll actually play around with embedded wizard tonight, hopefully I don't run into too many limitations for the free version 21-Aug-19 09:19 AM Since the MCU has the resources and my dev board has plenty of external flash, I don't think a UI on a PC is necessary in this case, just skips a communication step for me. 21-Aug-19 09:19 AM Lots of existing solutions and example codes out there too for embedded UIs 21-Aug-19 09:27 AM Well right, your code on the board should talk serial or some data interface to the PC, so your controller should have some commands to do system control, then you just make a GUI on the PC side to do control of that by communicating, so every time you re-spin the PC side code there would be no change to the micro controller unless you want to add or change something on the micro side. 21-Aug-19 09:34 AM It would be preferable for me to just have one piece of C code that I can change and update, I don't want to worry about developing a serial com protocal that will likely get changed often in the future. Also it looks like embedded UI development is getting easier and better, not much different than PC UIs honestly 21-Aug-19 09:34 AM You still get a C++ code generator, sometimes even with direct integration with your MCU real-time OS 21-Aug-19 09:34 AM And of course you should be able to use any GUI libraries you can use for a PC too 21-Aug-19 10:03 AM I mostly write it all myself 21-Aug-19 10:03 AM But there's tons of libs 21-Aug-19 10:03 AM there's stuff like ugui, minigui, littlevgl, ugfx is paid but it comes with a simulator 21-Aug-19 10:03 AM @Mason_Yu 21-Aug-19 10:06 AM Thanks! Will look in to these libs 21-Aug-19 10:22 AM I generally write all my libraries on the micro controller side of things, SPI/Serial/display graphics stuff, but on the PC side of things I definitely grab some high level libraries like a GUI library, but would probably still write my own Serial control stuff since its fairly basic to throw some bytes back and forth 21-Aug-19 06:23 PM 6pm espresso.. MMmmmmMMmm 22-Aug-19 10:14 AM first hike with doggie backpack https://imgur.com/a/r8SJTyG 22-Aug-19 03:41 PM Here's a compression seal 22-Aug-19 03:41 PM https://i.imgur.com/enHlu0W.mp4 22-Aug-19 09:15 PM If only we could all be as happy as those seals right there. 22-Aug-19 09:16 PM right? lol 23-Aug-19 06:58 AM Will anyone here be at the cern open days? 23-Aug-19 12:32 PM Would anyone be willing to send airfare to attend the CERN open day/can I trade them an optical scope? 23-Aug-19 01:14 PM all of you just live in the wrong part of the world 23-Aug-19 01:14 PM I'm in Belarus, I'm not that far away 23-Aug-19 01:14 PM But it's still a 200-400 eur round trip flight 23-Aug-19 01:17 PM let's just do the first server meetup at cern 23-Aug-19 01:17 PM I'm trying to get a special tour at gbar 23-Aug-19 01:20 PM We have a CERN person here 23-Aug-19 01:20 PM @Moist Mayonnaise 23-Aug-19 01:20 PM he sits in ATLAS control 23-Aug-19 01:21 PM so we're already three 23-Aug-19 01:21 PM hi mayo 23-Aug-19 01:21 PM be nice 23-Aug-19 01:24 PM we're all nice here 23-Aug-19 01:24 PM I'm telling mayo to be nice 23-Aug-19 01:25 PM we're all nice here 23-Aug-19 01:25 PM lights dim 23-Aug-19 01:26 PM although if someone wasn't nice around here the mods would finally have something to do 23-Aug-19 01:35 PM We are all nice until someone does something unholy like drops an SEM filament, then we collectively shame... (joking obviously) 23-Aug-19 01:35 PM Of-course now that I said that I'll be the first to drop an SEM filament 23-Aug-19 01:35 PM :P 23-Aug-19 01:36 PM I've dropped the tungsten filaments I'm planning to use for SEM 23-Aug-19 01:44 PM ouch 23-Aug-19 03:00 PM uhhhh @Moist Mayonnaise you work there? 23-Aug-19 03:00 PM do you have insight on the whole open day thing? 23-Aug-19 03:00 PM because i sure as hell don't 23-Aug-19 03:00 PM the information on the website is almost unusable if available at all 23-Aug-19 03:04 PM poor website 23-Aug-19 03:08 PM the website is nice. it just doesn't contain useful information for planning a rather expensive and long trip to Switerland (and yes, that writing is correct according to a big swiss manufacturer of electromaterial) 23-Aug-19 03:40 PM yeah CERN is pretty awful for accommodating private tourists tbh 24-Aug-19 09:30 PM I don’t understand the high prices for SEM tungsten filaments. They should not be that hard to make. Making mandrels is pretty simple and all you need is a tiny hydrogen retort or tube furnace to clean and anneal. 24-Aug-19 09:40 PM You can make them yourself fairly easily 24-Aug-19 09:40 PM Except maybe the really fine needle ones 25-Aug-19 07:37 AM needle-ss to say 25-Aug-19 07:41 AM https://giphy.com/gifs/reaction-c8bJDVz7i9KRW 25-Aug-19 07:46 AM ^^ 26-Aug-19 06:30 PM Nah its totally possible to make the feg tips as well 26-Aug-19 06:30 PM The hard part is actually getting the welds and annealing right 26-Aug-19 07:23 PM I wonder if it's possible to make a useful FEG x-ray tube 26-Aug-19 07:23 PM I see some experimental papers, but the beam quality was definitely something that wasn't optimized for 26-Aug-19 07:23 PM but they were successful in getting good current and voltage 26-Aug-19 07:23 PM 100uA @ 40kV(anode) was mentioned 26-Aug-19 07:23 PM that's about right for microfocus 26-Aug-19 07:23 PM https://www-mtl.mit.edu/wpmu/lfv/files/2015/04/2015-JMEMS-X-rays-Velasquez.pdf 26-Aug-19 07:23 PM this is really cool 26-Aug-19 08:32 PM Got my first order of flex PCBs from OSHPark. 26-Aug-19 08:32 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/image001-8C817.jpg 26-Aug-19 09:02 PM oh nice 26-Aug-19 09:48 PM Sweet 26-Aug-19 10:28 PM we need FEL xray 26-Aug-19 10:41 PM FEL? 26-Aug-19 11:07 PM Free electron laser? 26-Aug-19 11:41 PM it exists, sort of 26-Aug-19 11:41 PM https://en.wikipedia.org/wiki/European_XFEL 26-Aug-19 11:41 PM the x-ray beam is so intense it's actually blue 26-Aug-19 11:41 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/2018-11-22_X-ray-laser-beam_00040_thumbnai-3D3E2.png 26-Aug-19 11:41 PM https://www.youtube.com/watch?v=eZSfDK2hjCI 26-Aug-19 11:41 PM holy crap 26-Aug-19 11:41 PM an x-ray high speed camera! 26-Aug-19 11:41 PM https://www.xfel.eu/e35178/e35455/e35456/media/6581/Visualization_1_1500.gif 26-Aug-19 11:48 PM Is that SLACs accelerator? 26-Aug-19 11:48 PM apparently it's a brand new facility 26-Aug-19 11:48 PM xfel.eu 26-Aug-19 11:48 PM Oh yeah 26-Aug-19 11:48 PM world's largest x-ray laser 26-Aug-19 11:49 PM Slac does some similar stuff 26-Aug-19 11:49 PM That's pretty darn cool 26-Aug-19 11:49 PM $1.25B to build 26-Aug-19 11:49 PM that's one heck of an x-ray tube 26-Aug-19 11:49 PM interesting that the x-ray energy is limited to 3-25keV 26-Aug-19 11:49 PM or 0.26-3keV on the other beam line 27-Aug-19 12:17 AM yeah 27-Aug-19 12:17 AM let's build plasma wake wave accelerators for desktop units 27-Aug-19 12:19 AM Oh yeah no problem 27-Aug-19 12:21 AM in principle it's just electronics and a few lasers (the vacuum stuff is not worth to be mentioned because we are teh experts!!!1) 27-Aug-19 12:21 AM "experts" 27-Aug-19 12:22 AM eggbeards 27-Aug-19 12:22 AM Oh yeah just throw vacuum and lasers and some electronics at the problem why could it possibly be hard? 27-Aug-19 12:22 AM i guess so? 27-Aug-19 12:22 AM little termit weld over it - done? 27-Aug-19 12:22 AM if it doesn't work we could blame it poor funding 27-Aug-19 12:24 AM Oh yeah 27-Aug-19 12:24 AM thats definitely the only problem 27-Aug-19 12:25 AM we are eggbeards NOT business chads rolleyes 27-Aug-19 12:25 AM and than we publicly NERF the business guy in our team 27-Aug-19 12:25 AM pewpew 27-Aug-19 12:25 AM and join spacex 27-Aug-19 12:25 AM finally!1 27-Aug-19 12:27 AM Good exit plan 27-Aug-19 12:27 AM :3 27-Aug-19 12:28 AM Join yc and get a few million 27-Aug-19 12:28 AM Venture capital funded wake field accelerator. What could go wrong. 27-Aug-19 12:29 AM hum ok 27-Aug-19 10:12 AM You know, a FEL isn't as crazy as you would think to do at home. XFEL is not happening, but who said that's the only one... 27-Aug-19 10:20 AM Let's just say I've stumbled across some intriguing prospects in this area of physics to seriously bring the subject into the DIY realm 27-Aug-19 10:20 AM Also for Wakefield accelerators, the new state of the art stuff wouldn't be feasible, but there are some very old arcane related precursor technologies that are well with possibility as well 27-Aug-19 10:55 AM Its wonderful how cheap and readily available second hand equipment has become... Along with just technology itself becoming cheaper and cheaper. Wonderful stuff. 27-Aug-19 03:22 PM got the rose all planted back.. put some of the broad leaf mapple leaves ontop as leaf-litter mulch, then the rocks from the dirt ontop of them to keep them in place.. fertalized the soil and watered a bit as I was filling the hole back up.. it should do fine 27-Aug-19 06:46 PM motor can be 220v.. which means I need a 220v 1ph->3ph VFD.. which are cheaper than one that also needs a stepup transformer 27-Aug-19 06:46 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/DSC_0555-552F8.jpg 27-Aug-19 06:46 PM good 'ol 'merica mucking things up 28-Aug-19 01:13 AM yeah i guess i'll try a wakefield thingy 28-Aug-19 08:48 PM Single phase 120 to 208 or 240 Vfd units are cheap as these days. Got one recently for a 1.5 HP motor for like $100 with shipping and taxes. Watch out for that trump tax though. It’s gonna make the aliexpress stuff jump up in price soo n and they are closing the Hong Kong loophole. 28-Aug-19 09:04 PM How can I use a 3 phase 480V motor at home? 28-Aug-19 09:21 PM buy a VFD 28-Aug-19 09:21 PM you won't get anywhere near the rated power, but a VFD will drive it easily 29-Aug-19 01:43 AM https://www.ebay.com/itm/113862438275 Who of you is going to build themselves a clock 29-Aug-19 01:52 AM me 29-Aug-19 01:54 AM Hell yeah 29-Aug-19 01:58 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/thumbs2-F5268.png 29-Aug-19 02:50 AM aw jeez 29-Aug-19 07:10 AM Also check and see if that 480 motor can be re wired for 240. Many can be. The vfd would be easier to find. 29-Aug-19 09:25 AM @GigaSquirrel that is a ripoff! 29-Aug-19 09:25 AM They pulled the insides of an atomic clock out and are selling it for the same price as an actual atomic clock! 29-Aug-19 09:25 AM Just look for "rubidium standard" or "rubidium oscillator" or "fe-5680a" on eBay 29-Aug-19 09:25 AM They can be had from anywhere around $50-60 to $100-2500 depending on which one you want 29-Aug-19 09:25 AM Most just eat power and output a pair of signals - 10MHz and/or 1pps 29-Aug-19 09:25 AM about 10 minutes to get toasty and stabilize 29-Aug-19 09:25 AM https://www.ebay.com/itm/ACCUBEAT-RUBIDIUM-FREQUENCY-STANDARD-AR-60A-10MHz-33/323887343034 29-Aug-19 09:25 AM here's one of a bunch 29-Aug-19 09:25 AM http://www.tect-electronics.com/uploads/files/Accubeat/AR60A%20Spec%2024%205%2011.pdf 29-Aug-19 09:25 AM very nice unit. 29-Aug-19 09:47 AM I know the Standards can be had for cheaper 29-Aug-19 09:47 AM but that kit has some huge components and lots of DIY fun 29-Aug-19 09:47 AM except it's mostly useless 29-Aug-19 09:47 AM because it's random undocumented soviet gear 29-Aug-19 09:48 AM if you want exactly 10 MHz just buy an efratom, but if you want to build an atomic clock the kit is the way to go 29-Aug-19 09:48 AM the only documented bit is the FD-7K diode 29-Aug-19 09:48 AM what's the excitation energy, where does it transition, how do you drive it, etc 29-Aug-19 09:48 AM that's all unknown and will be nearly impossible to get right 29-Aug-19 09:48 AM especially with the weird lamp-looking thing 29-Aug-19 09:48 AM the tubes will glow nicely though 29-Aug-19 09:50 AM the lamp might be an issue, but the Filter / resonator is no issue 29-Aug-19 09:50 AM warm it up above the boiling point of Rb and pump some 100s mW at 6.8sth GHz 29-Aug-19 09:50 AM modulate it at a few Hz and let the Diode look for 2x that frequency 29-Aug-19 09:51 AM it's a cool kit 29-Aug-19 09:51 AM but not worth $240 29-Aug-19 09:51 AM cheaper to just pull a freq standard apart for the same parts 29-Aug-19 09:51 AM yep 29-Aug-19 09:51 AM alltough the kit is huge 29-Aug-19 09:51 AM most likely because it's hard to drive 29-Aug-19 09:52 AM not saying the price is justified 29-Aug-19 09:52 AM it's just a nice kit imo 29-Aug-19 09:52 AM almost 29-Aug-19 10:11 AM would use only a vapor cell ^^ 29-Aug-19 10:11 AM and a LD as the light source 29-Aug-19 10:13 AM ham'wa alles, könn'wa alles besorgen https://www.ebay.com/itm/123737315177 29-Aug-19 10:13 AM yo 29-Aug-19 10:13 AM machenwa so 29-Aug-19 10:13 AM but the wavelength has to be right 29-Aug-19 10:13 AM yep app 420nm 29-Aug-19 10:13 AM as an example 29-Aug-19 10:13 AM not sure if there's a right LED out there 29-Aug-19 10:14 AM you could use multi-photon-interaction too 29-Aug-19 10:14 AM but what i mean is, doing that is really common 29-Aug-19 10:14 AM done that 29-Aug-19 10:14 AM vapor cells are one of the references for optical systems and for microwave systems of course 29-Aug-19 10:14 AM they look nice and not expensive 29-Aug-19 10:14 AM those from the ukraine 29-Aug-19 10:14 AM ok more hardcore would be DIY the vapor cell 29-Aug-19 10:14 AM but ... i dunno ^^ 29-Aug-19 10:14 AM not that complicated, right? 29-Aug-19 10:19 AM Do it! 29-Aug-19 10:19 AM I can share all of my knowledge about Rb clocks in a few pictures 29-Aug-19 10:19 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20190829_191614-DBCDA.jpg 29-Aug-19 10:19 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20190829_191640-F807F.jpg 29-Aug-19 10:19 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20190829_191659-F610C.jpg 29-Aug-19 10:19 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20190829_191731-92E55.jpg 29-Aug-19 10:19 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20190829_191743-4BD19.jpg 29-Aug-19 10:19 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20190829_191810-C4225.jpg 29-Aug-19 10:19 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20190829_191832-8999E.jpg 29-Aug-19 10:19 AM maybe this is interesting to someone 29-Aug-19 10:33 AM yeah its more or less a FLL 29-Aug-19 10:34 AM fll? 29-Aug-19 10:35 AM what also would be super awesome: fritting(?) of glass and ceramics 29-Aug-19 10:35 AM frequency locked loop 29-Aug-19 10:35 AM ah, right 29-Aug-19 10:43 AM for smallish vapor cells made from silicon or ceramics and glas 29-Aug-19 10:43 AM the fritting thing 29-Aug-19 10:43 AM never tried that 29-Aug-19 10:43 AM i ordered 2 of the ukrainian Rb cells ^^ 29-Aug-19 10:43 AM not sure how good their optical windows are 29-Aug-19 10:43 AM but 2 of them because I tend to fck up HW 29-Aug-19 10:45 AM heh, nice 29-Aug-19 10:45 AM looking forward to your work with them 29-Aug-19 10:45 AM just remember that @george set the standard for this server with his coldhead 29-Aug-19 10:46 AM yep thats really nice 29-Aug-19 10:46 AM but Standzeit!!1 29-Aug-19 10:47 AM xD 29-Aug-19 10:48 AM i hope he can keep a cheap design for large mtbf and deep cryo 29-Aug-19 10:48 AM cheap as in doable for me with my low tec tools 29-Aug-19 10:48 AM he should sell them 29-Aug-19 10:48 AM same goes for you 29-Aug-19 10:48 AM yeah 29-Aug-19 10:48 AM you mean Rb clocks? 29-Aug-19 10:50 AM yep 29-Aug-19 10:50 AM if it works good enough y not 29-Aug-19 10:50 AM and i have a source for more cheap cells (incl being able to make them) 29-Aug-19 10:50 AM problem with selling of amateur stuff is imho that the customer can send you back the non working rubbish ^^ and then you've to analyse that it is not your fault ^^ 29-Aug-19 10:50 AM but yeah if it has low enough complexity 29-Aug-19 10:50 AM low enough relative to my ability building reliable stuff 29-Aug-19 10:55 AM not selling it as a product 29-Aug-19 10:55 AM but as a kit 29-Aug-19 10:55 AM customer has to do a bit 29-Aug-19 10:56 AM hmm good idea 29-Aug-19 10:56 AM like soldering the usb connector on the board 29-Aug-19 10:56 AM i mean youre right thats the workaround for produkthaftungsgesetz afaik 29-Aug-19 10:58 AM plus I don't want to buy a finished clock 29-Aug-19 10:58 AM pretty sure those used ones on ebay will be cheaper 29-Aug-19 10:58 AM I want to do some work myself, but not design the GHz VCO etc 29-Aug-19 10:59 AM ok 29-Aug-19 10:59 AM would use a MMIC but shhhh 29-Aug-19 10:59 AM if you buy the kit youll see 29-Aug-19 08:35 PM .. I like clocks 29-Aug-19 08:35 PM I only know basic theory of atomic clocks... would love to delve deeper with some experiments 30-Aug-19 08:31 AM Neato, I got some ancient X-Ray fluorecent thing 30-Aug-19 08:31 AM green/white stuff on one side and THICC glass on other, but while heavy it does not look like the lead glass I have seen before 30-Aug-19 08:31 AM Too bad I dont (yet) have an X-ray source to test it against. 01-Sep-19 07:06 PM I just noticed something odd. I moved from relatively strong HCL (35 or 50% I do believe) to a glass bottle with a HDPE top, and it’s already clouding the glass and turning the cap white. It’s only been a week or so. It has been warm in the garage lately. Thinking maybe I should move the acids inside maybe till it cools down? Anybody have any ideas. I have never encountered this problem with glass bottles before. 01-Sep-19 07:06 PM HDPE should be compatible 01-Sep-19 07:06 PM and, tbw, 35% or thereabouts is the azeotropic 01-Sep-19 07:07 PM I know 01-Sep-19 07:07 PM ie, getting more conc is very difficult/expensive 01-Sep-19 07:07 PM all of my ~35% muriatic is in the orig plastic gallon jugs they come in 01-Sep-19 07:07 PM It’s probably 35 then cause it was reasonably priced 01-Sep-19 07:07 PM you cant really get any higher strength OTC 01-Sep-19 07:07 PM fun fact - you can get higher conc in different solvents 01-Sep-19 07:08 PM It was in the poly bottle it came In and I noticed it starting to crust up the lid pretty well 01-Sep-19 07:08 PM yeah, well, the convienient store muriatic isnt reagent grade 01-Sep-19 07:08 PM you could dehydrate it and bubble into distilled water 01-Sep-19 07:09 PM I would not want to go any stronger! It’s way more powerful than I need as it is 01-Sep-19 07:09 PM or do an azeotropic balance xfer.. which is neat 01-Sep-19 07:09 PM I just want the bottle to stay clean and intact 01-Sep-19 07:09 PM take a bit and put in an open tupperware.. put some distilled water in another, and place them both in a tight plastic container.. 01-Sep-19 07:09 PM the HCl fumes will migrate to the fresh water 01-Sep-19 07:09 PM and equalize out 01-Sep-19 07:09 PM Interesting 01-Sep-19 07:09 PM that way, you dont have any of the other salts in the store bough muriatic 01-Sep-19 07:09 PM half strenght though 01-Sep-19 07:09 PM lemme pul up the video on that 01-Sep-19 07:10 PM I don’t really need it 01-Sep-19 07:10 PM https://www.youtube.com/watch?v=jv1Ms6Subg4 01-Sep-19 07:10 PM I mix it down to what I need 01-Sep-19 07:10 PM it's more so the avoidance of the other contaminations 01-Sep-19 07:10 PM while still buying it from the store 01-Sep-19 07:10 PM Generally I use it for oxide removal or in plating baths 01-Sep-19 07:10 PM I just don’t want my cabinet to start corroding away? Hahaha 01-Sep-19 07:11 PM you prob want it slightly cleaner then 01-Sep-19 07:11 PM hah, yeah, I hear ya 01-Sep-19 07:12 PM Also I keep that and some nitric so I can do some gold recovery some day. 01-Sep-19 07:12 PM I wonder if your cap was something beyond just HDPE 01-Sep-19 07:12 PM like the seal or something may have been something else 01-Sep-19 07:12 PM get teflon lined caps if you can 01-Sep-19 07:12 PM That’s what I was wondering, or there is some kind of filler in it or something 01-Sep-19 07:14 PM I actually picked up some of these.. killer price.. https://www.amazon.com/gp/product/B00E35R0O2/ 01-Sep-19 07:14 PM or if you have some compat plsatic sheet (even old bottle).. reline your cap with it 01-Sep-19 07:15 PM Cadamada 500ML Thick Glass Round Media Storage Bottles with Blue GL45 Screw Cap Pk/3 Thick Graduated Borosilicate Pyrex Glass Container: Amazon.com: Gateway https://www.amazon.com/Cadamada-Storage-Graduated-Borosilicate-Container/dp/B07H275DGN 01-Sep-19 07:15 PM I did that to my half gallon jug of ether with PTFE 01-Sep-19 07:15 PM This is what I am@using 01-Sep-19 07:16 PM polypropylene plug seal 01-Sep-19 07:16 PM PP is very resistant to most things 01-Sep-19 07:16 PM I used it as the light diffuser/"roof" of my fume hood 01-Sep-19 07:16 PM I need to move to a place that I can build a proper fume hood 01-Sep-19 07:17 PM hah, I did it in a sketch place last time.. I could do it here well enough, but not if I will be moving after school 01-Sep-19 07:17 PM As it is now I have to work in my garage 01-Sep-19 07:17 PM I’m older and have my own house but have been considering moving a bit farther out to the country so I can have my own shop and can leave the house normal. I always worry people are gonna think I’m a weirdo when they come over. 01-Sep-19 07:19 PM ah, the garage... the original hacker space 01-Sep-19 07:19 PM I really hated the idea of having hazourdous chemicals not far from where I sleep/live 01-Sep-19 07:19 PM even if I have a decent hood 01-Sep-19 07:19 PM I have a transformer winding and stacking setup in my living room and one of my bedrooms I built an electronic assembly station so I can bring real@work home 01-Sep-19 07:19 PM Yeah. I’m glad my neighbors don’t ask questions!!! 01-Sep-19 07:20 PM I never was questioned by the people that lived below me (in the house) 01-Sep-19 07:20 PM here I finally have my own house, but too many other projects to set it up again 01-Sep-19 07:20 PM but yeah... HCl should not bleach PP... maybe the colorants or plasticizers used were not compat 01-Sep-19 07:23 PM I have 4 6’ metal cabinets and a 2X6X4 rack in my garage full of vacuum parts, chemicals, and parts and materials of all kinds for vacuum tube and physics work. I also have half a storage unit full of stamped parts and tooling from former tube and vacuum gauge companies 01-Sep-19 07:23 PM hah! I've been looking into presses lately 01-Sep-19 07:23 PM since there are some watch parts that are simply not economical to mill out (even with a panto) 01-Sep-19 07:23 PM any of the odd-shaped things 01-Sep-19 07:24 PM Also about 400 pounds of nonex glass. But the most dangerous thing is still the gas cylinders. Yes I seem to recall you mentioned that and I posted some@pictures. 01-Sep-19 07:24 PM yokes, set-lever-jumper, etc 01-Sep-19 07:24 PM half looking at some older Bliss presses 01-Sep-19 07:25 PM Did you ever look into Weiss watches in LA? I probably would ya e told you about him 01-Sep-19 07:25 PM OBI ones, not really for me, but that is a very common format available 01-Sep-19 07:25 PM oh, yeah, I looked into him 01-Sep-19 07:25 PM he used to be a CNC technician and uses CNC a bit.. so that put me off 01-Sep-19 07:25 PM I want to be as traditional as possible 01-Sep-19 07:25 PM when things get CNC'd they lose craftsmanship, imo 01-Sep-19 07:26 PM Yeah. He realized the availability of watchmakers in the US would have held the company back 01-Sep-19 07:26 PM not that stmaping out parts has much craftsmanship, but it's something that isnt commonly seen for independant makers 01-Sep-19 07:26 PM I have the goal of making 100 a year, not 2 01-Sep-19 07:27 PM Hahahaha. So you mean no torbions that will take 6 months just to balance? 01-Sep-19 07:27 PM hah, first model I am planning is a flyback chrono 01-Sep-19 07:27 PM Wow that’s big time 01-Sep-19 07:27 PM a clone/homage of the Longines 13ZN 01-Sep-19 07:27 PM there is no real point in creating something from scratch.. I'm not inventing anything new 01-Sep-19 07:28 PM Good luck. Big mountain to climb there 01-Sep-19 07:28 PM moving things around doesnt do anything 01-Sep-19 07:28 PM like, it's all similar in the end 01-Sep-19 07:28 PM It’s just a sales gimmick 01-Sep-19 07:28 PM plus, it's more of an homage 01-Sep-19 07:28 PM right... US made is a sales gimmick 01-Sep-19 07:28 PM but hey... if there is a market for it...... 01-Sep-19 07:28 PM just gotta find the people who say: shutup and take my money 01-Sep-19 07:28 PM Well I still hope for the best for Cameron. He has a wife and baby to feed now! Hahaha 01-Sep-19 07:29 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/takemymoney-3A905.jpg 01-Sep-19 07:29 PM Yeah. Where are those guys to pay me 100K for a 100% bespoke tube amp! 01-Sep-19 07:29 PM hah... gotta find them! 01-Sep-19 07:30 PM I will hand engrave their kids names on the anodes of the tubes! Hahaha 01-Sep-19 07:30 PM I made decent progress on the tool & cutter grinder today 01-Sep-19 07:30 PM cleaned a bit.. still need to feed some new electric through and whatnot 01-Sep-19 07:30 PM the motor was tested yesterday on the VFD, worked fine 01-Sep-19 07:30 PM I actually need to build a grinding machine to grind 1.5” steel cutting wheels for my grid lathes 01-Sep-19 07:31 PM once I get the thing running.. let me know if you want/need custom stuff, or regrinds/sharpening 01-Sep-19 07:31 PM it will be very capable 01-Sep-19 07:31 PM plus, I need to learn 01-Sep-19 07:32 PM I got a surface grinder for free and began fixing damage that had occurred to it but I found a crack in a critical spot so it’s sitting behind our building waiting for the scrap man. 01-Sep-19 07:32 PM doh 01-Sep-19 07:32 PM this grinder is a universsal type, mcuh more than others noted, and can do surface 01-Sep-19 07:32 PM This is the sort of thing that I need the grinder right there to do incremental changes 01-Sep-19 07:32 PM a good 300mm of depth travel in that usually limitting direction 01-Sep-19 07:32 PM ah 01-Sep-19 07:32 PM I am lucky enough that the ways on the machine were in good condition 01-Sep-19 07:32 PM given it was from the mid 70s or so (I thought 80s initially, but I think it was delivered in '75) 01-Sep-19 07:32 PM with near zero maintenance 01-Sep-19 07:32 PM or, at least, towards the end 01-Sep-19 07:32 PM super happy to get it, actually 01-Sep-19 07:34 PM There is a upper cutter wheel and a lower swagger wheel 01-Sep-19 07:34 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/image0-E797D.jpg 01-Sep-19 07:34 PM and it's swiss made.. more of a gimmick watchmaking thing 01-Sep-19 07:34 PM wow, neat 01-Sep-19 07:34 PM my mother (stained glass artist) never had tools like that 01-Sep-19 07:34 PM This is for grid winding 01-Sep-19 07:35 PM It'd be interesting to see the entire process on video 01-Sep-19 07:35 PM From raw materials to a finished tube 01-Sep-19 07:35 PM Most videos on youtube are incredibly bad quality and near vintage now 01-Sep-19 07:35 PM there are a few glass blowers of scientific equipment on YT that are pretty good 01-Sep-19 07:35 PM This is my glass saw 01-Sep-19 07:35 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/image0-26277.jpg 01-Sep-19 07:35 PM hah, yeah, I guess their quality isnt that great 01-Sep-19 07:36 PM When the weather cools down and the mosquitos die off I will be making a full video about it 01-Sep-19 07:36 PM nice 01-Sep-19 07:36 PM scientific glassblowing is mostly videos of people making funny shaped chem manifolds 01-Sep-19 07:36 PM I plan to do end-to-end filming of my processes 01-Sep-19 07:37 PM This is my main glass lathe 01-Sep-19 07:37 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/image0-3A08C.jpg 01-Sep-19 07:37 PM ... marketing gimmick 01-Sep-19 07:37 PM Proof that I know what I am talking about/doing in the US 01-Sep-19 07:37 PM I know video/film work really well, so let me know if you need help or advice @Charles 01-Sep-19 07:37 PM that is a miniature-looking lathe 01-Sep-19 07:37 PM I especially like that left glass chuck 01-Sep-19 07:37 PM just a regular chuck with... brazed rods? 01-Sep-19 07:37 PM so, I was at a lockpicking 'con' a few months back, and lockpickinglawyer was the guest speaker... we asked him about the filming and whatnot 01-Sep-19 07:37 PM ... he uses his iphone... edits it on there, and posts from there 01-Sep-19 07:38 PM CALIBRATION NOT REQUIRED 01-Sep-19 07:38 PM typically a single take 01-Sep-19 07:38 PM his videos reflect that 01-Sep-19 07:38 PM it just sorta surprised us 01-Sep-19 07:38 PM identical videos, with only the lock different, and stupidly easy to control lighting 01-Sep-19 07:38 PM bigclive does the same 01-Sep-19 07:38 PM oh, he upped his lighting game 01-Sep-19 07:38 PM Yeah. It’s a Litton F-U type lathe 01-Sep-19 07:39 PM still extremely easy to control something on the desk 01-Sep-19 07:39 PM he gave some pointers about running a channel 01-Sep-19 07:39 PM And correct. Brazed right on to a craftsman or some such chuck. 01-Sep-19 07:39 PM I wouldn't take pointers from the lawyer to be honest 01-Sep-19 07:39 PM what he has is a big community/followers 01-Sep-19 07:39 PM unless you're really into lockpicking, his videos get deathly boring real fast 01-Sep-19 07:40 PM and he developed a decent pattern 01-Sep-19 07:40 PM I unsubscribed just because it got boring 01-Sep-19 07:40 PM hah 01-Sep-19 07:40 PM I dont regularly watch him 01-Sep-19 07:40 PM I rarely pick anymore.. too busy 01-Sep-19 07:40 PM "hi, today we're looking at this lock, oh look, it's open, thanks for watching" 01-Sep-19 07:40 PM OO.. Tuesday is a meetup 01-Sep-19 07:40 PM Here is another very tortured F lathe I saved from a horrible fate. 01-Sep-19 07:40 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/image0-CD8AD.jpg 01-Sep-19 07:40 PM I've seen coathangers, but never lathehangers 01-Sep-19 07:41 PM the advice he gave from starting from near nothing to what he does now was good 01-Sep-19 07:41 PM but kinda generic video/lighting/YT related 01-Sep-19 07:41 PM On the left is a vertical sealer. The very first storage scope tubes were sealed on this machine. To the right is a flat press stem making station 01-Sep-19 07:41 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/image0-A35A0.jpg 01-Sep-19 07:42 PM fancy looking thing 01-Sep-19 07:42 PM are the little vertical dinguses torches, or holders for pinching tools? 01-Sep-19 07:43 PM Torches. 01-Sep-19 07:43 PM fancy uniform heat 01-Sep-19 07:44 PM Hold on. Let me fire it up 01-Sep-19 07:45 PM I think I'm going to head downstairs at the tool & cutter grinder for a moment.. maybe pop the motor actually open and see what kinda of dust can be cleaned out inside 01-Sep-19 07:45 PM don't scream when you do 01-Sep-19 07:46 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/video0-90662.mov 01-Sep-19 07:47 PM it spins! 01-Sep-19 07:47 PM I thought it was just uniform burners, but it even spins! 01-Sep-19 07:49 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/video0-4B1DA.mov 01-Sep-19 07:50 PM that is really cool 01-Sep-19 07:51 PM I would do some sealing now but it’s too hot 01-Sep-19 07:51 PM Do you use oxygen concentrators for your oxygen supply, or just bottles? 01-Sep-19 07:51 PM I would also need to open the garage door and I would be killed by the mosquitos! 01-Sep-19 07:51 PM No. I need the pressure of a bottle 01-Sep-19 07:51 PM If I was ever going to set up my automatic sealer for lime/lead glass I would get a concentrator and change the torches to match. These pinpoint heads need a steadfast regulator. 01-Sep-19 07:53 PM I'm using MAPP with a venturi torch for now, no oxygen at all 01-Sep-19 07:53 PM It's really hard to get here in quantities applicable for a home cheaply 01-Sep-19 07:53 PM A 40l bottle would cause my family to shove the torch into unacceptable orifices 01-Sep-19 07:53 PM But I don't get the benefit of only running the gas, because burning MAPP in air with no oxygen(or forced mixing with venturi) covers the entire room with beautiful black snow 01-Sep-19 07:53 PM But the more I learn about glassblowing, the more I realize that my setup is woefully inadequate, despite my success with making precision pipettes a while back 01-Sep-19 07:57 PM Hold on. I’m gonna take another picture 01-Sep-19 07:57 PM With these two torches I can do just about everything up to nearly 2” diameter. 01-Sep-19 07:57 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/image0-6D95C.jpg 01-Sep-19 08:00 PM I have a Chinese clone of the Smiths little torch that was made slightly overspec 01-Sep-19 08:00 PM When I do get a flame out of it, the largest nozzles make something huge 01-Sep-19 08:00 PM And the venturi torch which a friend let me borrow to try makes anything from a medium to an uncomfortably large flame 01-Sep-19 08:01 PM Electric Start Propane Torch https://www.harborfreight.com/electric-start-propane-torch-91061.html this is a great propane only torch for bringing work up to annealing temps 01-Sep-19 08:01 PM I need to dig mine up 01-Sep-19 08:01 PM I have a small propane tank 01-Sep-19 08:01 PM And a slightly larger 5l tank of MAPP 01-Sep-19 08:04 PM And a national 3 type hand torch can do sealing very well and has a wide selection of tips available. MAPP is tricky for glass. It’s hard to get a an oxidizing flame with it and you need that or the glasses can darken by reducing the metals in the glass. 01-Sep-19 08:04 PM An oxygen concentrator can work with a type 3 torch 01-Sep-19 08:05 PM I'm planning to use borosilicate for everything 01-Sep-19 08:05 PM You need oxygen and propane or natural gas for boot 01-Sep-19 08:05 PM Boro 01-Sep-19 08:06 PM We have a natural gas pipe, but the pressure would require me to push it through a compressor to run it 01-Sep-19 08:06 PM I use BBQ tanks 01-Sep-19 08:06 PM I guess I'll look at propane 01-Sep-19 08:06 PM But oxygen concentrators are painfully expensive here 01-Sep-19 08:06 PM Where do you live? 01-Sep-19 08:06 PM Belarus 01-Sep-19 08:06 PM Technologically speaking, the middle of nowhere 01-Sep-19 08:07 PM Oh. Here cause everybody is fat medical oxygen concentrators with some life left in them are a couple hundred bucks and will last forever 01-Sep-19 08:07 PM Yeah, you're lucky in that regard 01-Sep-19 08:07 PM Here they're very rare on the used market, and the cheapest 2-4l/min(@ 90%) options are $300-400+ 01-Sep-19 08:07 PM Does it really matter if the glass darkens, from a mechanical and vacuum standpoint? 01-Sep-19 08:07 PM I don't really care if the tubes aren't aesthetically pleasing, I can hide all the ugly parts by pushing it into a base 01-Sep-19 08:09 PM Of you can get yourself a second hand tank from a oxy cutting torch some gas companies will just let you exchange the tank for one of theirs if you pay cash. 01-Sep-19 08:09 PM Getting a tank is easy, and the biggest ones aren't that expensive 01-Sep-19 08:09 PM But my family would kill me if I brought a 40 liter, 150 bar tank of oxygen home 01-Sep-19 08:10 PM It’s more than that. If you chemically alter the glass you will have a COE mismatch and it will crack 01-Sep-19 08:10 PM So making seals with that is a no-go 01-Sep-19 08:10 PM Well. Don’t bring it home. Leave it outside! 01-Sep-19 08:10 PM I have no outside! 01-Sep-19 08:10 PM I live in apartment building 01-Sep-19 08:11 PM Oh. Yeah. Mission impossible. 01-Sep-19 08:11 PM This is why I'm hunting for a chunky oxygen concentrator 01-Sep-19 08:11 PM Well reason to move out someday 01-Sep-19 08:11 PM Hopefully moving to a civilized country 01-Sep-19 08:11 PM Preferably with a large scrap and surplus tech market :P 01-Sep-19 08:12 PM Checz republic! 01-Sep-19 08:12 PM Probably the US 01-Sep-19 08:12 PM Ignoring the politics, the industries are falling apart, so plenty of scrap 01-Sep-19 08:13 PM Story https://www.daliborfarny.com/story/ go work for dalibor in the czech republic 01-Sep-19 08:14 PM Heh, his work is nice 01-Sep-19 08:14 PM Not much scrap anymore. With environmental laws now the scrap business is bad 01-Sep-19 08:14 PM Surplus tech! 01-Sep-19 08:14 PM Pick up a SEM in your next town over 01-Sep-19 08:14 PM Or free overnight shipping for electronic components 01-Sep-19 08:15 PM Dalibor is learning. He is not completely there yet. I brokered a deal and sold him some equipment and offered some advice on how to fix his problems. He took the equipment, but not the advice. Oh well. He will learn 01-Sep-19 08:15 PM Go to Canada. I would. Hahahaha 01-Sep-19 08:17 PM Moving anywhere on that continent would require mid 5 digits 01-Sep-19 08:17 PM Which I don't yet have 01-Sep-19 08:17 PM Yeah. True. 01-Sep-19 08:17 PM Shipping an entire container of the tech crap I've accumulated would be expensive 01-Sep-19 08:17 PM You could always go the UK 01-Sep-19 08:17 PM But it’s pretty expensive there 01-Sep-19 08:17 PM Yah, but why would I? :P 01-Sep-19 08:18 PM I actually like it there. 01-Sep-19 08:18 PM I live in California and I am tired of the government sharing one of my pants legs and a homeless guy sharing the other. 01-Sep-19 08:19 PM Move to the middle of nowhere 01-Sep-19 08:19 PM I am in the middle of nowhere! Hahaha 01-Sep-19 08:19 PM Most of California is agricultural rural 01-Sep-19 08:19 PM But we are governed by LA and the Bay Area. 01-Sep-19 08:19 PM They call us fly over country 01-Sep-19 08:20 PM A friend of mine lives in the Appalachians 01-Sep-19 08:20 PM Absolutely nothing for kilometers around, no major population centers for hundreds 01-Sep-19 08:21 PM We actually have a pretty big city here. Fresno. But we still identify with agriculture. I work in the electronics industry but for Ag purposes. We are one of 3 electronics companies left in our area 01-Sep-19 08:21 PM I wouldn't mind moving to somewhere like that, except: 1) Internet 2) Shipping times 01-Sep-19 08:21 PM He uses satellite internet... 01-Sep-19 08:23 PM Yeah. We do have cheap internet here and if you can get things on Amazon cheap shipping. Otherwise shipping is actually getting pretty expensive with all the fuel and energy surcharges and general greedy nature of fed Ex and UPS 01-Sep-19 08:23 PM Not as expensive as international shipping though 01-Sep-19 08:23 PM True 01-Sep-19 08:23 PM Well. Take the chance while you are young and move out. By the time you are ready to move back hone and be with family perhaps things will have improved. 01-Sep-19 08:25 PM Things are alright here in general, and I'm not that young 01-Sep-19 08:25 PM But I want more opportunities 01-Sep-19 08:25 PM I don't see a future here for my hobbies and expertise 01-Sep-19 08:58 PM was able to dissassemble the motor completely.. relatively clean inside as the fans just cool the fins of the housing (against the coils) and thus no real air flow inside.. added more lube to teh bearings.. cleaned the fan (and snapped it a little.. superglue will fix it, still one piece, but yeah..) and also cleaned the fan gaurd which had the most grime out of anywhere before, but I had scrapped most of it off prior - but now with solvent so muuch cleaner.. tomorrow will likely be feeding the new electric for the motor up the column .. and also trying to figure out the lube system and such - which will likely require me to lift the entire workhead off the base again 05-Sep-19 02:23 PM Came across this https://old.reddit.com/r/amateurradio/comments/czvz2t/helium_dilution_cryostat/ 05-Sep-19 02:23 PM Somebody with a reddit account might ping the guy. 05-Sep-19 02:39 PM I would ping him but I'd rather not crush his dreams and morale 05-Sep-19 06:16 PM snrk 06-Sep-19 09:42 AM hah, had a dream that the sewage leak was caused by my house and they had to tear up my driveway to get down tot he problem 06-Sep-19 09:42 AM rose is still not doing good.. maybe I put too much fertalizer in when repacking the soil 07-Sep-19 01:33 PM hahaha..... oh boy.. that just happened 07-Sep-19 01:33 PM basically when I was up on the roof cleaning it off with a new leaf blower, that wa scorded - my mistake, thoguht it was battery.. the cord snagged the ladder pulling it down 07-Sep-19 01:33 PM I was stuck on the roof... 07-Sep-19 01:33 PM luckily some buds were around the corner and available that I was able to call to come by and get the ladder back up so I could get down 07-Sep-19 01:33 PM maybe 5mins of the 'oh no' feeling 07-Sep-19 01:33 PM oh, and when I tried to call them, my phone was on the fritz, so I had to reboot it 07-Sep-19 01:33 PM super glad I had my phone on me though, I've gone up there without one before 07-Sep-19 01:35 PM Just like, yell at people at the bus stop 07-Sep-19 01:35 PM yeah, luckily hihg traffic area, so there would have been a good soul to help out 07-Sep-19 01:35 PM if even 30 mins for the next bus sort of thing 07-Sep-19 01:35 PM (weekend schedule) 07-Sep-19 01:35 PM someone rolls up and steels laser 07-Sep-19 01:36 PM but wow... that'll learn you 07-Sep-19 01:36 PM the only laser I have is a construction one 07-Sep-19 01:36 PM Laser? 07-Sep-19 01:36 PM LASER? 07-Sep-19 01:36 PM LASER 07-Sep-19 01:37 PM lader**?? 07-Sep-19 01:37 PM There we go 07-Sep-19 01:37 PM I was like... 07-Sep-19 01:37 PM would be an odd item to steel 07-Sep-19 01:37 PM but sure! 07-Sep-19 01:37 PM oh, also a grinding machine 07-Sep-19 01:37 PM so, it would have been only a ~8ft drop if I had to jump down, and on a bunch of fir needles (semi soft) 07-Sep-19 01:38 PM Yeah no one is crazy enough to try to steal that grinder 07-Sep-19 01:39 PM honestly if anyone were to break in, my bicycle in the next room should be the first grab 07-Sep-19 01:39 PM sighs 07-Sep-19 01:39 PM side note, I got PTFE grease for the linear bearings 07-Sep-19 01:39 PM fits my grease gun 07-Sep-19 01:40 PM So... Do we have to take it all apart again? 07-Sep-19 01:40 PM I am working on removing the hydraulics (will need to be rebuilt to some degree, or at least acessed) 07-Sep-19 01:40 PM umm.. the head is ontop of blocks, jsut above the unit 07-Sep-19 01:40 PM so it can rest back down easy enough 07-Sep-19 01:41 PM Oh god 07-Sep-19 01:41 PM but I got the lube line hooked back up.. I think the back lube line was never connected.. going to look into it now 07-Sep-19 01:41 PM beyond that though.. I basically just need to put the motor back in, and the table on, then it is functional 07-Sep-19 01:41 PM It was just spewing? 07-Sep-19 01:41 PM the lube? it is hand crank 07-Sep-19 01:41 PM Yeah 07-Sep-19 01:41 PM so once I reconnected the line, I jsut had to push the air out 07-Sep-19 01:42 PM When you cranked it 07-Sep-19 01:42 PM but, I think the back line was never really connected 07-Sep-19 01:42 PM the lube flows on all 3 places I know about 07-Sep-19 01:42 PM Was it just coming out of the con connected line? 07-Sep-19 01:42 PM the 2-ish that I dont, I htink are not/were never connected 07-Sep-19 01:42 PM well.. I primed it a lil.. but I knew it was disconnected 07-Sep-19 01:42 PM I am in contact with Strausak USA who contacted switzerland for the technical manual 07-Sep-19 01:42 PM may or may not exist 07-Sep-19 01:43 PM Oh that would be nice 07-Sep-19 01:43 PM circa 1975 07-Sep-19 01:43 PM but yeah, the motor works on the VFD perfectly 07-Sep-19 01:43 PM still packed more grease into those bearings though, not that it was dry, but yeah 07-Sep-19 01:45 PM Well that's good 07-Sep-19 01:45 PM I havent tested any of the actual electronics though.. .. basicall start/stop buttons at the end of the day.. and the hydraulics which will be looked at later 07-Sep-19 01:45 PM the water logged stuff needs to basically all be removed and examined, but no real need for it if I have seperate motor control 07-Sep-19 01:45 PM just been pretty busy cleaning everything 07-Sep-19 01:45 PM using light oil for things that I dont want water based cleaner (simple green extreme) to touch, such as those linear bearings (super bright and shiny) and using the simple green for actual crud on painted surfaces and such 07-Sep-19 01:45 PM the smell has seemingly gone semi-away 07-Sep-19 01:45 PM on that note though, I want to scrub out the trough right now..... no need to jump up on the roof anymore..... 07-Sep-19 01:45 PM let that be a lesson for everyone 07-Sep-19 01:45 PM make sure ladders are tied down, dont knock them down, and have your phone on you even if you live in a heavily trafficed area 07-Sep-19 01:45 PM kthxbye 07-Sep-19 02:58 PM got like 95+% of the grime off.. needed to chissel a bit 07-Sep-19 03:06 PM not your standard dirt.. as it's mostly grinding dust, so hardened metal dust, compacted 07-Sep-19 03:06 PM beyond the rest of the table (top side).. that was the bulk of the grime removed 07-Sep-19 09:25 PM doh, lost power for a moment, thanks thunderstorm 07-Sep-19 09:25 PM hah, just lost it again 07-Sep-19 11:19 PM How bad was the rain in Puget Sound area? My driveway has a clogged drain and I bet my garage flooded.... 07-Sep-19 11:19 PM @Noxz , my wife is interested in getting a watch and we happen to be in Switzerland right now. Am I correct in assuming there's no point in looking for one here since her budget is probably less than $100? 07-Sep-19 11:39 PM @piGuy yeah, that is likely true.. you can get swiss quartz watches (where the quartz come from the finest swiss alps........) but even entry level versions of those prob start at 200, but likely higher 07-Sep-19 11:39 PM best bet would be to look at second hand stores, find something that she likes a bit, and send it my way to repair all year long 07-Sep-19 11:39 PM but you may find better stuff (second hand) over there 07-Sep-19 11:39 PM the ETA 955 is what is in most entry level quartz, or maybe the 255 07-Sep-19 11:39 PM most ladies watches, nowadays, are always quartz.. they dont want to deal with manual winds, or even automatics.. they dont ... appreciate?.. the mechanics as much as mens 07-Sep-19 11:39 PM just so odd that a quartz watch can cost $2k+ 08-Sep-19 12:38 AM I mean, if it is a solid gold Rolex that is quartz driven, it better cost, and be worth something, eh? 08-Sep-19 12:38 AM atleast it's weight in gold 08-Sep-19 07:50 AM Quartz Rolex are the value play in luxury watches if it’s something you are going to wear daily. I still just wear cheap Casio digitalis I get for $7 or my G Shock if I want nerd out. I have mentioned here before however that one day I want to buy a Weiss watch cause I know the guy who makes them. Basic field or tool watches but he makes his own movements in L.A. for his new ones. Older ones had Swiss movements. 08-Sep-19 10:58 AM Rolex also has amazing resale value in comparison to other brands 08-Sep-19 05:44 PM Since i started carrying a cell phone with a decent camera about a decade ago, I've stopped wearing watches completely 08-Sep-19 07:09 PM I was against cell phone cameras for quite some time 08-Sep-19 07:09 PM coming from an artistic family and such 08-Sep-19 07:09 PM also, most mechanical watches being sold today arent exactly for reading the time accurately.. that was won a while ago during the quartz crisis.. it's more of a jewelry thing 08-Sep-19 07:09 PM it is still much faster to check your wrist than to reach into your pocket, pulkl out your phone, turn the screen on.. read the time, maybe turn the screen off, and put it back in 08-Sep-19 07:09 PM no need to set things down that are in your hands, etc 08-Sep-19 07:09 PM not that it needs a sales pitch.. but they sometimes work better than a phone 08-Sep-19 07:50 PM I have a little mystery on my hands. I mentioned last week that I found my HCL bottle had a white powder residue on it so I transferred it to a new glass bottle. I find now that it has spread to the entire top two shelves of the cabinet. I collected some of it, wetted it and did a PH test and it appears to be neutral. Any thoughts? To be safe I am emptying the whole cabinet and inspecting each container or bag for any obvious leaks but have found nothing yet. 08-Sep-19 07:50 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/image1-0DFBA.jpg 08-Sep-19 07:50 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/image0-934FE.jpg 08-Sep-19 08:29 PM Is the HCL pure? 08-Sep-19 08:29 PM Tested with a drop of HCL. No reaction. Tested with dissolved potassium hydroxide. No reaction. Anybody have any other ideas on how to identify it? The good news is it appears to be non reactive. It is also on the overhead surface, or rather the bottom of the top of the cabinet so it’s some form of condensate. 08-Sep-19 08:29 PM No. It’s 35% 08-Sep-19 08:29 PM oh, white powder residue on it 08-Sep-19 08:29 PM the entire shelf looks really dusty 08-Sep-19 08:29 PM It’s that residue. It spread 08-Sep-19 08:30 PM the source may not be the hcl bottle 08-Sep-19 08:30 PM move it elsewhere 08-Sep-19 08:30 PM That’s what I am now thinking 08-Sep-19 08:30 PM looks like industrial dust to me, lol 08-Sep-19 08:30 PM all of my shelves and unused gear is covered in it 08-Sep-19 08:31 PM Would be fine, were it not in my garage in a closed cabinet 08-Sep-19 08:31 PM I have stuff collecting dust that is in a closed shelf 08-Sep-19 08:31 PM but it could be possible that something chemical is going on 08-Sep-19 08:31 PM Also if it were just dust it would not be sticking to the underside of the top of the cabinet 08-Sep-19 08:32 PM I say separate things into groups and put into boxes until you isolate what is causing this 08-Sep-19 08:32 PM It was most concentrated by my coating spray containers. Separation is my next step. 08-Sep-19 08:34 PM possibly vapors leaking and reacting with something 08-Sep-19 08:34 PM Those sprays contain either Yittria in butyl acetate binder with butalol carrier or alumina powder in the same binder. Both are white and powdery but unlikely to escape 08-Sep-19 08:34 PM I was thinking the butyl acetate maybe but it dissolved in water so I think that’s out 08-Sep-19 08:35 PM Oh! Here's a vacuum question I still haven't solved by googling: White ceramic, in paste and standoff form, inside vacuum tubes - what is it!? 08-Sep-19 08:35 PM I want a little bottle of that vacuum cement that you bake. 08-Sep-19 08:37 PM Oh. It’s usually just an alumina powder. Different people have different mixtures. The problem is firing it. You have to fire it either in vacuum or hydrogen preferably to get it to bond and it has to be raised to nearly yellow heat or beyond to winter 08-Sep-19 08:37 PM Sinter 08-Sep-19 08:37 PM Also you can use porcelain slip 08-Sep-19 08:37 PM What are you trying to bond it to? 08-Sep-19 08:38 PM I just want a general adhesive for bonding isolated elements inside a vacuum tube 08-Sep-19 08:38 PM I use glass and nickel rod. 08-Sep-19 08:38 PM Like those little ceramic standoff and washer stacks in nixies 08-Sep-19 08:38 PM With a little nib of paste on the end to keep it in place 08-Sep-19 08:39 PM Those are steatite generally 08-Sep-19 08:39 PM Same process as I mentioned before 08-Sep-19 08:39 PM Talc standoffs!? 08-Sep-19 08:40 PM Actually talc is used as a flux in those processes sometimes 08-Sep-19 08:40 PM I thought it was something like zirconia or alumina 08-Sep-19 08:41 PM Steatite | Superior Technical Ceramics https://www.ceramics.net/ceramic-materials-solutions/silicates/steatite 08-Sep-19 08:41 PM Alumina and Lava (Wonderstone) were used in power tubes 08-Sep-19 08:41 PM Steatite is cheaper 08-Sep-19 08:42 PM I wonder if you can use TiO2 for the paste 08-Sep-19 08:42 PM TiO2 is dirt cheap and I can get it in pure, ultra fine powder form 08-Sep-19 08:42 PM I don’t see why not. The problem is that the firing temp might be above the melting temp of what you are trying to bond 08-Sep-19 08:43 PM I thought it was some special ceramic glue that the manufacturers kept secret 08-Sep-19 08:43 PM Nixie manufacturers are making a resurgence 08-Sep-19 08:43 PM https://www.youtube.com/watch?v=uHv1f4_tDv4 08-Sep-19 08:44 PM There is a type of silicate liquid (not sodium silicate) that can be mixed with alumina or zirconia and used as a literal glue. I can’t remember what it was, but I do remember it was freaking expensive. We used to mix it with zirconium hydride and use it as a paint on getter. 08-Sep-19 08:44 PM There's another one, this time from Ukraine 08-Sep-19 08:44 PM I'll probably be making my own getters 08-Sep-19 08:45 PM Not surprised. Dalibor is getting high prices for his so naturally somebody else would have to come along. 08-Sep-19 08:45 PM Find an oxide that reduces easily at low temperatures(maybe 600-900C), sinter it into little cups or strip 08-Sep-19 08:45 PM They're making IN-18 replicas for ~$100 each 08-Sep-19 08:45 PM meanwhile you can still get NOS IN-18s for $40 each... 08-Sep-19 08:46 PM I made the decision to stay out of nixies. To really get a sharp looking consistent glow you really need the Kr 85 08-Sep-19 08:47 PM Kr 85? 08-Sep-19 08:47 PM Krypton? 08-Sep-19 08:47 PM Radioactive isotope and it lowers and regulates the ion avalanche point 08-Sep-19 08:47 PM They all used it. 08-Sep-19 08:47 PM It’s a controlled substance now 08-Sep-19 08:47 PM I highly doubt that 08-Sep-19 08:47 PM But I have a bunch of nixies and also a very sensitive spectrometer.... 08-Sep-19 08:47 PM I also have friends who have access to HPGe detectors that sniff out single events in hours of data 08-Sep-19 08:49 PM All of the boroughs tubes had it. Also many discharge regulator tubes do too 08-Sep-19 08:49 PM wouldn't all the Kr 85 be gone by now? 08-Sep-19 08:49 PM half life is 10 years 08-Sep-19 08:49 PM Nope 08-Sep-19 08:49 PM I mean not all, but most 08-Sep-19 08:49 PM 10.7 years 08-Sep-19 08:50 PM We got it from linde when we needed it 08-Sep-19 08:50 PM if anything is in there, my friend will find it 08-Sep-19 08:50 PM sorry, I meant in the tubes 08-Sep-19 08:50 PM @Goldsteel is the friend 08-Sep-19 08:50 PM not in the world 08-Sep-19 08:50 PM I could also replace it with... I don't know, radon? 08-Sep-19 08:50 PM There you go. Still avaliable 08-Sep-19 08:51 PM I can... source radon 08-Sep-19 08:51 PM cough 08-Sep-19 08:51 PM Anyone can also easily get thoria 08-Sep-19 08:51 PM Link 08-Sep-19 08:51 PM Hmmmm... link is not coming through 08-Sep-19 08:51 PM No link, but I can give you a hint: Flea markets, scintillator, Ra-226 08-Sep-19 08:51 PM :P 08-Sep-19 08:52 PM http://hiq.linde-gas.com/en/images/Rare%20Gas%20Krypton-85_tcm899-90088.pdf 08-Sep-19 08:52 PM Or, alternatively: A poorly ventilated basement and some ingenuity 08-Sep-19 08:53 PM or an abandoned mine in an area with granitic bedrock? 08-Sep-19 08:53 PM These are the mixes we used for thyratrons regulators and xenon rectifiers 08-Sep-19 08:53 PM Or that 08-Sep-19 08:53 PM I can also go to Russia with a SCUBA tank and a shoebox compressor 08-Sep-19 08:53 PM Take a hike into the abandoned Beshtau uranium mine 08-Sep-19 08:54 PM I think you'll have trouble bringing anything radioactive out of russia 08-Sep-19 08:54 PM Radon is easy to get out 08-Sep-19 08:54 PM Since there's no gamma 08-Sep-19 08:54 PM true, I suppose 08-Sep-19 08:54 PM We had to sign the life of the first Borns over to get just a tiny bit of it too, but when you are a government contractor they let you have it, or did back then anyways 08-Sep-19 08:55 PM Yeah I really don't think you need radioactive activation in tubes nowadays 08-Sep-19 08:55 PM Not for low volume, clean production anyway 08-Sep-19 08:55 PM Hahaha. But it gives you that real pop! Hahaha 08-Sep-19 08:55 PM can you replace it electrically somehow? like with fast rise times or something? 08-Sep-19 08:56 PM If I make some nixies I'll send you a column sign indicator with a thoriated cathode, Charles 08-Sep-19 08:56 PM I'll pick the hottest specimen. 08-Sep-19 08:56 PM All you have to do to use regular gasses is up the ion voltage 08-Sep-19 08:56 PM Hahaha 08-Sep-19 08:56 PM I could also scrape in some radium, americium, or plutonium 08-Sep-19 08:56 PM To taste of course 08-Sep-19 08:56 PM Or even strontium 08-Sep-19 08:56 PM When I get some time I want to make little tiny like 1” static deflection crt’s 08-Sep-19 08:57 PM Someone made a 3mm one! 08-Sep-19 08:57 PM I saw that 08-Sep-19 08:57 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/crt6187-700-5C985.png 08-Sep-19 08:57 PM I had a 1 cm one from a camcorder at my parents' house 08-Sep-19 08:57 PM I have one 08-Sep-19 08:57 PM They're adorable 08-Sep-19 08:57 PM And power hungry 08-Sep-19 08:57 PM it was broken though 08-Sep-19 08:57 PM like deflection was broken 08-Sep-19 08:58 PM I have some electron guns but they are about 1.5 cm diameter 08-Sep-19 08:58 PM If you can make a CRT, you can make an SEM 08-Sep-19 08:58 PM (ish) 08-Sep-19 08:58 PM or at least I couldn't figure it out as a kid 08-Sep-19 08:58 PM I figured the hardest part of making a SEM was the magnetics (and vacuum) 08-Sep-19 08:58 PM and vibration 08-Sep-19 08:59 PM if you want to get super-duper-nanometer resolution, sure 08-Sep-19 08:59 PM http://tubetime.us/index.php/2018/06/04/a-vacuum-tube-rom/ 08-Sep-19 08:59 PM However 08-Sep-19 08:59 PM If you want a generic scanning-electron-photo-maker, you can do it using a CRT 08-Sep-19 08:59 PM That ^ is basically an SEM-in-a-tube 08-Sep-19 09:00 PM oh it's like a lookup table of sprites 08-Sep-19 09:00 PM Except analog! 08-Sep-19 09:00 PM It's even got an SED 08-Sep-19 09:01 PM it's more like a scanning electron macroscope 08-Sep-19 09:01 PM scanning electron scope 08-Sep-19 09:05 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/image1-4884C.jpg 08-Sep-19 09:05 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/image0-77514.jpg 08-Sep-19 09:05 PM is that a custom part? 08-Sep-19 09:06 PM It’s a pretty common gun from scope CRT’s 08-Sep-19 09:06 PM looks pretty simple 08-Sep-19 09:06 PM looks like there's a few electrodes - where is the separation between the cathode and wehnelt? 08-Sep-19 09:06 PM Yes. Somewhere I have the focusing cup grids 08-Sep-19 09:06 PM The outer nickel shell is the grid. The lead coming off is the cathode connection and the heaters are spiral types not shown cause if I open them up they will spring out all over the floor 08-Sep-19 09:08 PM I will need to do a lot more simulation before I try building my own 08-Sep-19 09:08 PM last time I tried, 90% of the electrons decided to hang out in the wehnelt after being boiled off 08-Sep-19 09:09 PM @ 08-Sep-19 09:09 PM What voltage was your cathode and target at respective of grid and what was the target distance 08-Sep-19 09:10 PM I'm not sure, it was entirely simulated 08-Sep-19 09:10 PM Don't remember which values I set 08-Sep-19 09:11 PM Oh. Yeah. Electron optics are like that. 08-Sep-19 09:11 PM Hard to model 08-Sep-19 09:11 PM You should obtain COMSOL Multiphysics, the older versions are obtainable 08-Sep-19 09:11 PM It's fun to play with 08-Sep-19 09:11 PM Fairly intuitive once you understand how it works 08-Sep-19 09:12 PM Well good News is that now that my chemicals are all out I can take a@proper inventory! 08-Sep-19 09:12 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/image0-54C25.jpg 08-Sep-19 09:13 PM Those storage cabinets are immaculately shiny 08-Sep-19 09:14 PM I like to keep things reasonably clean in my garage but inside my house is messy 08-Sep-19 09:14 PM I found a supplier of unknown glass that was "used for glassblowing" 08-Sep-19 09:15 PM But then again the garage has many many ways to die in it so there is that! 08-Sep-19 09:15 PM He's got tons of 30mm diameter tube, $15 for 16 meters 08-Sep-19 09:15 PM Also found a roll of cheap dumet close by 08-Sep-19 09:15 PM So I'll try doing that 08-Sep-19 09:15 PM It’s probably some kind of Pyrex or Duran type. 08-Sep-19 09:16 PM I'm going to guess it's soda lime 08-Sep-19 09:16 PM There's no way someone would mislabel and sell pyrex for cents per gram 08-Sep-19 09:16 PM You can tell by the sounds it makes and if it scratches easily 08-Sep-19 09:16 PM Kinda hard to scratch test or ding glass that is ~600km away 08-Sep-19 09:17 PM True 08-Sep-19 09:17 PM But if it's pyrex, I'm buying up his entire stock 08-Sep-19 09:17 PM $15 for 10x 30x1600mm tubes is a steal 08-Sep-19 09:17 PM Soda lime in 30 mm is kinda hard to find in small quantity and that’s a good general use size 08-Sep-19 09:17 PM A friend of mine just dumped a few thousand pounds of it cheap, but not before I got a few boxes 08-Sep-19 09:17 PM Pyrex that is 08-Sep-19 09:18 PM I have a feeling 30mm will be my maximum size, and I really like the size regardless 08-Sep-19 09:18 PM Big enough to make display and x-ray tubes, small enough to work easily 08-Sep-19 09:22 PM I have some of these borated dumet/nickel leads if you want a few I can tape them on a card in a small envelope and mail them to you. They seal really easy. 08-Sep-19 09:22 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/image0-5BEA2.jpg 08-Sep-19 09:23 PM That would be nice if I decide to try soda lime 08-Sep-19 09:23 PM Though these are easy enough to make for me 08-Sep-19 09:23 PM I have a spot welder I can reconfigure however I want, and if I get a roll of dumet, I'll have a lifetime's worth for $10 08-Sep-19 09:23 PM Ok. If you decide to make many get borated dumet 08-Sep-19 09:23 PM Or borate it yourself 08-Sep-19 09:24 PM Yeah I'd borate myself 08-Sep-19 09:25 PM You can seal without borating but you loose copper from having to oxidize the outer layer thereby significantly reducing the current capacity of the lead 08-Sep-19 09:27 PM filament would be the only reason I'd want current capacity 08-Sep-19 09:27 PM so I could probably parallel a few pins up 08-Sep-19 11:34 PM @Deleted User ? 08-Sep-19 11:34 PM Oh 08-Sep-19 11:34 PM Yes if there’s a source I can usually tell you what’s in it often within minutes unless it’s particularly weak or lots of uncommon ones mixed together 08-Sep-19 11:34 PM I’ve tested some pretty garbage sources made from the neutron tank and they still show up pretty well even below 1kBq 09-Sep-19 07:15 AM A fried said he and his (vacuum researcher father) made a SEM over a weekend with off the shelf components, it only attained sub-millimeter resolution but he said his father was more interested in testing the vacuum system itself, I think 09-Sep-19 07:15 AM Friend* 09-Sep-19 07:30 AM awesome 10-Sep-19 06:01 AM the first official vacuum hackers meetup will behin in two hours! 10-Sep-19 10:31 AM greetings from @piGuy , his wonderful wife, @Pan Da and me! 10-Sep-19 10:51 AM cool 10-Sep-19 10:51 AM awesome 10-Sep-19 10:51 AM your cryohead rig ... how much pressure does it need on the He compressor side? 10-Sep-19 11:28 AM 22 bar vs 4 bar 10-Sep-19 02:21 PM meetup was great, 5/5, definitely would buy again 10-Sep-19 02:22 PM +1 10-Sep-19 04:35 PM so if I wanted to cobble together a SEM with random parts, ... what do people usually use for a detector screen? just some random fine-grained ZnS painted onto a plate? 10-Sep-19 04:35 PM couple people have half-jokingly asked about when i'm gonna make one, and that's always been the vague unanswered question in my head 10-Sep-19 04:46 PM The quantum efficiency is bad but if you have a high enough beam energy you can just use photo diodes and get back scatter electrons 10-Sep-19 05:36 PM just got the table back on, but the bearings didnt line up well, so will have to take it off (at least at height) and reposition them 10-Sep-19 07:15 PM @qualia try using a regular scintillator that's good for beta 10-Sep-19 07:15 PM since... you're basically detecting low energy beta radiation 10-Sep-19 07:15 PM ZnS will work, but it might be a good idea to try a chunk of CsI:Tl, since it's not very hygroscopic 10-Sep-19 07:15 PM that's what I will be trying 10-Sep-19 07:16 PM oh interesting 10-Sep-19 07:17 PM remember that you want a secondary acceleration voltage 10-Sep-19 07:17 PM to slam the secondary electrons into the material much harder 10-Sep-19 08:34 PM bakin' beams 11-Sep-19 08:02 AM what's the blackest black one can get / make at Home? 11-Sep-19 08:02 AM spcetral uniformity in the optical range would be a huge plus 11-Sep-19 08:02 AM soot maybe? 11-Sep-19 08:02 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/Difference-reflectance-spectra-DI-of-const-E89AF.png 11-Sep-19 08:02 AM this looks promising 11-Sep-19 09:54 AM Optical = visible light? 11-Sep-19 09:54 AM Soot is probably the best, or carbon nanotubes(you've got a vacuum chamber!) 11-Sep-19 08:00 PM Why did the infinite improbability drive just come to mind???? 11-Sep-19 08:25 PM @Charles seems like MAPP doesn't kill borosilicate 11-Sep-19 08:25 PM https://i.spirit.re/Gh0fU.jpg 11-Sep-19 08:25 PM I tortured this bead of glass for a good minute under a MAPP air burner(no oxygen), then pinched hard using cold pliers 11-Sep-19 08:25 PM no cracking or blackening 11-Sep-19 08:25 PM and yes that's a metal lathe with reverse jaws... because it does the spinny and I can hold glass in it 11-Sep-19 08:38 PM Good deal 11-Sep-19 10:53 PM moin 12-Sep-19 02:19 PM well, @piGuy could have joined the dead gauges society today, too bad they were too tired to show up 12-Sep-19 10:31 PM Dead gauges society? That sounds like a group I didn’t know I was already in! 13-Sep-19 12:44 AM I plan on going into school next week to service (clean up) a dial indicator gauge for the rotation of the table of the grinding machine, so you can accurately set the angle 13-Sep-19 01:04 AM @Charles but you aren't :P 13-Sep-19 01:17 AM Sorry @GigaSquirrel ! Mrs. piGuy has been wearing me out with all of this travel and tourism. 13-Sep-19 01:18 AM Heh, no worries, I just wanted to make you jealous :P 13-Sep-19 01:23 AM Don't worry, I'm jealous already. 13-Sep-19 01:26 AM So I guess it's a good thing you didn't end up seeing our storage :D 13-Sep-19 12:40 PM speaking of jealousy 13-Sep-19 12:40 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20190913_211702-CE461.jpg 13-Sep-19 12:40 PM On my way to cern <3 13-Sep-19 04:17 PM Friday the 13th... and Full Moon (harvest moon, at that).. next time this happens will be 2049 14-Sep-19 10:33 PM @qualia this has all the stuff you should need to know for the basics, just need to squeeze the beam more than pull it (microscope instead of television) https://www.amazon.com/gp/aw/d/1118140664/ 14-Sep-19 10:33 PM https://images-na.ssl-images-amazon.com/images/I/41V%2B7M%2BVhNL._AC_SY400_.jpg 15-Sep-19 12:33 AM hey I've got that book! 15-Sep-19 12:33 AM fun read but no way worth the 80 bucks 15-Sep-19 12:33 AM if anyone has some questions I can copy the pages 15-Sep-19 12:34 PM Anyone up for voicechat in a bit? 15-Sep-19 12:47 PM @GigaSquirrel it's on libgen, no need for you to copy 15-Sep-19 11:36 PM Ok ^^ 17-Sep-19 03:28 AM New toy, not vacuum-related 17-Sep-19 03:28 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_2270-E57EC.JPG 17-Sep-19 03:32 AM Woohoo! 17-Sep-19 06:07 AM moin! 17-Sep-19 06:07 AM started waking up at my normal school time, even though it doesnt start till next week, to get me into the rythm 17-Sep-19 09:38 AM Ugh, my normal school time starting next week is 6pm and I'm less enthusiastic than you are :p 17-Sep-19 12:26 PM I wake up at 5:30am for shcool which starts at 7:30-4:30.. and because of trade school style there isnt really subject change, but one task all day long 17-Sep-19 11:38 PM Nice 17-Sep-19 11:38 PM Sounds like you're doing a lot 19-Sep-19 10:06 PM ooh resin 19-Sep-19 10:06 PM i just got a 3d printer, i gotta hook it up to solvespace next 20-Sep-19 03:00 PM UPDATE: i did that and it works :D 20-Sep-19 03:00 PM i sincerely hope the novelty of, like, building a thing, typing in numbers, pressing some buttons and waiting a bit, and then having an object where the numbers on the computer match the numbers on the calipers.. never gets old 20-Sep-19 03:27 PM It has been +18months since I got my cheapo 3d printer kit, it's yet to produce it's first print 20-Sep-19 04:51 PM that's unfortunate 20-Sep-19 04:51 PM i got an Ender 3 Pro for, i think a bit less than $200 on sale 20-Sep-19 04:52 PM Dang 20-Sep-19 04:52 PM Good price 20-Sep-19 04:52 PM it was definitely an impulse purchase, and i need to print a dial indicator holder for it to level it out 20-Sep-19 04:52 PM RIP my weekends 20-Sep-19 04:52 PM the missus has been doing a lot of lost-PLA aluminum casting lately and i'm probably going to end up trying to make some electrodes for my ion trap like that 20-Sep-19 04:55 PM Hm. Lost pla grids... 20-Sep-19 04:56 PM someone on twitter was at an electric propulsion conference and there was a presentation on IEC thrusters 20-Sep-19 04:56 PM they 3d printed a very pretty little grid for it 20-Sep-19 04:57 PM Yeah I saw that 20-Sep-19 04:57 PM Iec thruster is an interesting idea 20-Sep-19 04:57 PM i'm not sure what the benefits are, seems like it'd be really lossy, but, hey 20-Sep-19 04:57 PM lossy/inefficient rather 20-Sep-19 04:58 PM Yeah aggred 20-Sep-19 04:58 PM Doesn't mean it's not cool 20-Sep-19 04:59 PM oh certainly :D 21-Sep-19 01:41 AM hi 21-Sep-19 01:41 AM what's happened to the DIY GM cooler? 21-Sep-19 01:41 AM iirc it died cause of not hardened surfaces etc, right? 21-Sep-19 01:41 AM I bought a kinda dead one, the excenter seems to be extremely punished - as far as i can see it through the little viewport 21-Sep-19 01:41 AM but maybe simply cleaning and a new bearing? 21-Sep-19 01:41 AM (I want a portable LOX generator) 21-Sep-19 01:52 AM @george did that, but he's currently on vacation ^^ 21-Sep-19 01:52 AM the project isn't dead, just on hold for a month or so 21-Sep-19 01:52 AM if you want to repair a gm coldhead you could look at my site, I did that ^.^ 21-Sep-19 01:52 AM https://gigabecquerel.wordpress.com/2019/08/11/repairing-and-testing-a-gm-cryocooler/ 21-Sep-19 02:00 AM nice, tnx 21-Sep-19 02:07 AM happy to help where I can ^^ 21-Sep-19 02:16 AM ehehehehe 21-Sep-19 02:16 AM i guess i should dismantle it outside 21-Sep-19 02:16 AM who knows what it's contaminated with ^^ 21-Sep-19 02:18 AM teardown pics \o/ 21-Sep-19 02:24 AM oquay 21-Sep-19 02:35 AM pre teardown pic 21-Sep-19 02:35 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/image0-30966.jpg 21-Sep-19 02:35 AM zaepfle is for scale 21-Sep-19 02:38 AM prost! 21-Sep-19 02:38 AM pic of the inside? 21-Sep-19 02:38 AM the size of the finger would be interesting 21-Sep-19 02:38 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/image0-32AAD.jpg 21-Sep-19 02:38 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/image0-41802.jpg 21-Sep-19 02:38 AM you can kinda see the dudt 21-Sep-19 02:38 AM dust 21-Sep-19 02:39 AM yep, ouch 21-Sep-19 02:39 AM but I thing Georg changed bearings on one just like that 21-Sep-19 02:40 AM ah ok, thats what I thought 21-Sep-19 02:41 AM well, most cti seem to be the same, more or less 21-Sep-19 02:50 AM yep 22-Sep-19 07:32 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20190922_163142-1C599.jpg 22-Sep-19 07:32 AM @piGuy I found a current pic of the deutsches museum 22-Sep-19 10:37 AM Hahaha 22-Sep-19 02:11 PM It was a good experience even though a lot of it was closed. 22-Sep-19 02:14 PM at least you had a book showing you how it was 22-Sep-19 02:14 PM did you understand anything from it? ^^ 22-Sep-19 02:16 PM I understand the pictures. 22-Sep-19 02:21 PM speaking of 22-Sep-19 02:21 PM http://cds.cern.ch/record/1874543/files/86-5-306.jpg 23-Sep-19 06:07 PM First day of school was decent.. pretty relaxed 24-Sep-19 10:05 AM https://twitter.com/dereklowe/status/1176484427414822912?s=21 24-Sep-19 10:05 AM :0 wow 25-Sep-19 01:25 AM @Applied_Ion is it possible to use one of your mini thrusters for a sputter coater/etcher ? I know it's low overall energy, but maybe that has some benefits in better control or slower etch/deposition rates? 25-Sep-19 06:28 AM @nmz787 technically lol, it is after all just a pulsed plasma source. Sputter coating depends on the fuel you use though - this often uses plastic, and with Teflon you get a mix of fluorine and carbon lol. You could make something similar known as a vacuum arc thruster which uses metal fuel predominantly and modify that for sputter coating possibly. You could also run this one off of gas like Argon, but would need to be puff injected. 25-Sep-19 11:27 AM I have the working on my laser cutter previous owner before the guy who gave it to me screwed everything up and why did you ignore the E stop and limit switches blues. Hahahahaha. Yeah these guys monkey’d it up pretty good. Basic mechanics are sold though. 26-Sep-19 09:10 AM awsome 26-Sep-19 09:10 AM @Nixie saw it in instagram 26-Sep-19 09:11 AM in instagram? 26-Sep-19 09:11 AM the workshop? 26-Sep-19 09:11 AM erm...I don't have instagram 26-Sep-19 09:11 AM (maybe you mean Twitter) 26-Sep-19 09:50 AM yeah meant twitter 26-Sep-19 10:21 AM XD 26-Sep-19 10:39 AM it's like a thing for my calling twitter instagram 26-Sep-19 10:44 AM Things have names, if you change their names, then I'm not gonna understand you. XDDDDD 26-Sep-19 10:44 AM Hello, dyno. 26-Sep-19 10:44 AM Gf does it sometimes too, and I'm like "wth, gurl..." 26-Sep-19 10:46 AM ^^ 26-Sep-19 03:52 PM Side project not related to high vacuum: https://twitter.com/ConnorKrukosky/status/1177349067225083906 26-Sep-19 03:54 PM nice display 26-Sep-19 03:54 PM vfd ? 26-Sep-19 03:54 PM led! 26-Sep-19 03:56 PM humm 26-Sep-19 03:59 PM mhhh? 26-Sep-19 08:35 PM They are 4 digit modules, pretty amazing. 26-Sep-19 08:35 PM I got one around the workshop 26-Sep-19 08:35 PM NASA is looking for a watchmaker to replace one that is retiring.. A person is required to perform detailed, hi precision assembly of miniaturized mechanical parts for laboratory and spaceflight mass spectrometers as well as other delicate scientific instruments. The ability to read/ interpret engineering drawings is required assuring individual parts are within the specified tolerances. Exceptional organization skills and practices such as parts tracking and adherence to quality control procedures are needed. A demonstrated ability to assemble small, complex parts is desired. Experience using small conventional machining equipment, microscopes, inspection systems and assembly tools is essential. Most assembly will be performed under cleanroom conditions. Knowledge of vacuum technology and chemical cleaning procedures is desirable, however not necessary as this can be part of the training. A basic understanding of some physics and electrical principles would be very helpful in performing this work. 26-Sep-19 08:35 PM assembly of spaceflight mass spectrometers .... 26-Sep-19 08:46 PM I could do that... 26-Sep-19 08:46 PM on the east coast of the US... 26-Sep-19 08:46 PM if you would be prepared to move 26-Sep-19 08:46 PM also, given it is basically Govt contract work, I dont know if you need to be a full citizen sort of thing 26-Sep-19 08:46 PM Nah, I'm good where I am, less Spaceworthy-bragging-rights, but good. 26-Sep-19 08:47 PM How are things going btw, havent seen you on lately? 26-Sep-19 08:47 PM 2nd year of school started up on Monday for me 26-Sep-19 08:47 PM I left the server for a while. 26-Sep-19 08:47 PM Everything is ok now. I learned to ride a unycicle, and bought a new workshop (75 + 40 square meters, I get the keys next week) 26-Sep-19 08:48 PM I have a unicycle in the closet, havent spent enough time on it to learn it though 26-Sep-19 08:48 PM (I juggle and such) 26-Sep-19 08:48 PM I'm workin gon tooling up my home workshop, as well as reserving tools elsehwere for when I move back 'home' 26-Sep-19 08:48 PM came across an awesome set of stuff tonight, emailed the dude on info, want to offer him something for it 26-Sep-19 08:49 PM Nice! well, its a nightmare to learn, BUT very satisfactory. It took me 11h to ride it sort of succesfully. 26-Sep-19 08:49 PM Excellent, share if you get it! 26-Sep-19 08:50 PM I took one partial class on it, but it wasnt very good 26-Sep-19 08:50 PM NOONE is very good at unicycling at the beginning. 26-Sep-19 08:50 PM machines 26-Sep-19 08:50 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/s-l1600-DD178.jpg 26-Sep-19 08:50 PM Really, unless the person is some kind of equilibrium god or something, it's just incredibly difficult to start. 26-Sep-19 08:50 PM a pinion cutter, and mislabeled as a 'cutter sharpener'.. it's actually a pinion leaf polisher.. which is MUCH more rare 26-Sep-19 08:51 PM BUT it's totally learn-able it just requires time 26-Sep-19 08:51 PM Ohhhhhhhhhh 26-Sep-19 08:51 PM sexy! 26-Sep-19 08:51 PM I already purchased an automatic gear cutter that can do pinions.. so I dont need it.. but having one specific for pinions, and another for wheels, would be good 26-Sep-19 08:51 PM yeah, vintage Swiss machinery is sexy 26-Sep-19 08:52 PM applauds 26-Sep-19 08:52 PM very, very nice 26-Sep-19 08:52 PM wheel/pinion cutter 26-Sep-19 08:52 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/s-l1600-34647.jpg 26-Sep-19 08:52 PM cute little thing 26-Sep-19 08:52 PM that one is super automatic.. it will go through THREE different cutters, and automatically turn off.. so you can saw, then rough cut something.. before moving onto final tooth form 26-Sep-19 08:53 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/004-EB96D.jpg 26-Sep-19 08:53 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/003-F0E7F.jpg 26-Sep-19 08:53 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/002-3F10B.jpg 26-Sep-19 08:53 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/001-BB6A9.jpg 26-Sep-19 08:53 PM nice! 26-Sep-19 08:53 PM Amazing, how does it achieve the "stepping" motion between cutters? 26-Sep-19 08:53 PM adman helped me move a giant swiss tool & cutter grinder into the house like 5 weeks back 26-Sep-19 08:53 PM some cam arrangement? 26-Sep-19 08:53 PM yeah, index wheels, to the right 26-Sep-19 08:53 PM or, err. somewhere 26-Sep-19 08:53 PM the wheel at the right is for the tooths 26-Sep-19 08:53 PM teeths 26-Sep-19 08:53 PM oh, if you look at the left.. 26-Sep-19 08:53 PM I think there 26-Sep-19 08:53 PM I havent seen it in person yet 26-Sep-19 08:54 PM (that's the workshop the first day I saw it, it is an somewhat old carpentry, I will receive it as-is, and will have to do a good cleanup of everything) 26-Sep-19 08:54 PM the clockmaker put it in his shed with my name on it 26-Sep-19 08:54 PM I'd like to see it in operation when you get it! 26-Sep-19 08:55 PM one year away! 26-Sep-19 08:55 PM it's waiting for me when I return 'home' 26-Sep-19 08:55 PM One year is nothing. XD 26-Sep-19 08:55 PM I think I can wait 26-Sep-19 08:55 PM headshot 26-Sep-19 08:55 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/s-l1600-24F55.jpg 26-Sep-19 08:55 PM doesnt reallly show how with that.. 26-Sep-19 08:55 PM I was htinking maybe the channel cam to the left 26-Sep-19 08:56 PM Don't worry, I'll see it in time (gotta go to work!) 26-Sep-19 08:56 PM ohh, nice 26-Sep-19 08:56 PM bye 26-Sep-19 08:57 PM Definitely a beautiful piece of machinery, I want more info later ^^ 26-Sep-19 08:57 PM Bye!! 26-Sep-19 09:30 PM The new shop look like it's going to be great. 26-Sep-19 10:14 PM @Conmega my FIB controls run by a 68k... So it isn't too far from vacuum related! 26-Sep-19 10:41 PM heh neat! 27-Sep-19 02:13 AM It will require a TON of work, beginning with the floor, wich is crooked. The thing is that the mezannine is already very close to the head, so just adding a self leveling layer is not feasible. In theory I can just break that floor and put a new one (it's a first floor with no parking lot underneath) it should only have dirt under it. I am worried it might be reinforced with rebar, but until next week that I poke a drill through, I won't know. (I'll get the keys next week). 27-Sep-19 02:13 AM Also, general cleaning, wall refurbishment, I have to make a whole new door, as the old one is meh quality. 27-Sep-19 02:13 AM BUT 27-Sep-19 02:13 AM It's 78 square meters on the bottom floor and 40 square meters in the mezzanine, wich feels pretty solid. 27-Sep-19 02:13 AM I will pay about 28.000€ for it. (A bargain, but I live in spain's arse, so its just cheaper) 27-Sep-19 02:13 AM The plan is to have all the machinery at the front, and in the back, the semicon lab. Office space on top, and a bit of storage. 27-Sep-19 02:13 AM AND there is a recess on one side, where I'll put a climbing wall 27-Sep-19 02:22 AM 28k€? That's a nice 1 to 5 m² space! 27-Sep-19 02:23 AM Heh, I don't plan to live in germany, just visit often. 27-Sep-19 02:38 AM If you have any questions on concrete let me know. Family owned a concrete buisness when I was growing up. 27-Sep-19 02:38 AM Noted! 27-Sep-19 02:45 AM I can ask what he would do for a challenging floor leveling like that. We almost had to do that in my shop. 27-Sep-19 02:54 AM When my shop was built years ago the ground under the floor hadn't been compacted at all, so the slab did that after it cured. 27-Sep-19 03:12 AM Oh, interesting. Gives me hope in an "easy" removal. 27-Sep-19 03:12 AM Ii would use the excuse of the floor change to also make a hole in the ground for some battery storage for a future project 27-Sep-19 03:13 AM I mean easy in concrete still means you have to lift all of the concrete some amount distance in the air 27-Sep-19 03:13 AM And like, concrete is really heavy 27-Sep-19 03:17 AM No, no, I plan to break it up and put a new floor. Doing it a small slab at a time. (The workshop is narrow and hellishly long. I don't have the measures, but about 4.5+16m) 27-Sep-19 03:17 AM So i can do slabs of 2.25*2m, for example. 27-Sep-19 03:30 AM The fashion victim in me would really, really, like to do hexagonal slabs. 27-Sep-19 03:33 AM From a structural and settling standpoint small slabs are challenging for a number of reasons 27-Sep-19 03:33 AM Now a stamped or cut hexagon pattern, that would be pretty cool 27-Sep-19 03:39 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/hexagon-muster-stein-gehweg-strasse-oder-d-8039D.png 27-Sep-19 03:40 AM Pavers are a different story 27-Sep-19 03:40 AM There's a multi layer build up under that that's highly and uniformly compacted 27-Sep-19 03:40 AM And those type of systems general take regular rework at first, as it settles you pull some out, add a bit of sand underneath, and relevel 27-Sep-19 03:42 AM I was thinking in big hexagons. Maybe one meter across or a bit bigger. 27-Sep-19 03:42 AM Not that I think it will be easier, NOR practical. 27-Sep-19 03:43 AM Meeter cuts for expansion and crack control is a bit tight, but totally doable 27-Sep-19 03:43 AM Meeter slabs though... That's small enough to rock and unenevenly settle 27-Sep-19 03:43 AM Additionally matching color of concrete batches day to day is hard 27-Sep-19 03:43 AM If you care about that 27-Sep-19 03:43 AM Changes in humidity, tempururture, slump, water content, and varying surface work can all affect color 27-Sep-19 03:43 AM You can do washes after to try and make it more even though 27-Sep-19 03:47 AM Color variation: totally ok. 27-Sep-19 03:47 AM Settling trouble: thats more unsettling. XD 27-Sep-19 03:48 AM Yeah it sucks 27-Sep-19 03:48 AM I was just daydreaming, I suppose. 27-Sep-19 03:48 AM Best solution is one slab with rebar 27-Sep-19 03:48 AM I mean, i bought the place, I would like it to be a dream workshop. 27-Sep-19 03:48 AM Yeah, but I won't be able to pour that much cement, nor order a truck to the place. 27-Sep-19 03:49 AM Rebar doesn't really improve the pressure raiting of the concrete in this circumstance, but it does prevent uneven settling 27-Sep-19 03:49 AM (the whole floor as a single reinforced slab, I mean) 27-Sep-19 03:49 AM Why can't you get a truck? 27-Sep-19 03:50 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/rcc-door2-3896E.jpg 27-Sep-19 03:51 AM Well, not that I can't, but because I would need permits and such, if I can do it manually, even of its a sh*tload of work, I will go unnoticed in this shenanigan. 27-Sep-19 03:51 AM just get lots of those and use them as flooring 27-Sep-19 03:51 AM @GigaSquirrel that's a-door-able 27-Sep-19 03:51 AM Ah 27-Sep-19 03:51 AM Small batch sucks to do 27-Sep-19 03:51 AM But there are ways it's possible 27-Sep-19 03:51 AM With reinforcement 27-Sep-19 03:51 AM One of the challenges is having the entire floor being at different cure rates 27-Sep-19 03:52 AM *slabs @Pan Da * 27-Sep-19 03:53 AM Concrete takes years to fully stop moving around 27-Sep-19 03:53 AM creepy concrete! 27-Sep-19 03:53 AM actually it will never stop fully 27-Sep-19 03:54 AM Even then 100 year old concrete is strong and more cured than 99 year old concrete 27-Sep-19 03:54 AM yes 27-Sep-19 03:54 AM it's a gel 27-Sep-19 03:54 AM Yeah it's never fully set 27-Sep-19 03:55 AM slurp 27-Sep-19 03:55 AM But there's a time after which you can expect no more stress from curing to cause further crack formation 27-Sep-19 03:55 AM Oh...ffs...don't discourage me like that. 27-Sep-19 03:56 AM If you're clever with bit it should be possible to work around it 27-Sep-19 03:56 AM I just haven't ever seen anyone go for quite this combination before 27-Sep-19 03:57 AM well you can make a small workshops floor out of concrete of course 27-Sep-19 03:57 AM This is not small, unfortunately. 27-Sep-19 03:58 AM yeah i mean concrete plates where you need it 27-Sep-19 03:58 AM and tiles arround them, that's what i did 27-Sep-19 03:58 AM the slabs for "heavier" machines which needed to be bolted into the ground 27-Sep-19 03:58 AM i made a 7m * 3m concrete plate for that 27-Sep-19 03:58 AM and put 50 * 50 slabs around it 27-Sep-19 04:00 AM So it would be about 1.5 trucks for the entire floor by my math 27-Sep-19 04:00 AM 50cm * 50cm 27-Sep-19 04:00 AM i made a frame out of steel beams and put the reinforcement armor in it and then the concrete 27-Sep-19 04:00 AM (if that helps) ^^ 27-Sep-19 04:05 AM So Nixie there is one other thing 27-Sep-19 04:05 AM You need about 15 cubic yards of concrete 27-Sep-19 04:05 AM Each yard is 4050 lbs 27-Sep-19 04:05 AM That's 60750 lbs or 27.5 metric tons 27-Sep-19 04:07 AM imagine that in TNT 27-Sep-19 04:07 AM jk 27-Sep-19 04:08 AM I'm not sure how exactly you would want to move 27.5 metric tons of stuff... 27-Sep-19 04:08 AM with a concrete pump? 27-Sep-19 04:08 AM Exactly 27-Sep-19 04:08 AM A job this big is a lot for small batch 27-Sep-19 04:09 AM i dunno here you call them with i dunno 1 month of lead time 27-Sep-19 04:09 AM and then they come 27-Sep-19 04:09 AM and pump the concrete all over your fa... eh place 27-Sep-19 04:09 AM as you like it 27-Sep-19 04:09 AM If you buy the dispatcher Christmas gifts every year you can call them on hours notice 27-Sep-19 04:09 AM It was pretty nice 27-Sep-19 04:10 AM yeah ok 27-Sep-19 04:10 AM It's funny how stuff like that works 27-Sep-19 04:10 AM "we have a concrete emergency!" 27-Sep-19 04:10 AM Hey it's happened 27-Sep-19 04:11 AM of course 27-Sep-19 04:11 AM small little reactor desaster and there you go 27-Sep-19 04:11 AM here where i'm living is kinda building boom, concrete pumps all over the place 27-Sep-19 04:12 AM So yeah if you want to use 1250 bags of cement and gravel... Have fun. 27-Sep-19 04:12 AM i would not! 27-Sep-19 04:12 AM + it's not cheaper 27-Sep-19 04:12 AM Well, the thing is I have a year until i get the loan for it, and I have to save. So 30 tons of material ocer a year is not much actually. 27-Sep-19 04:12 AM Definitely not 27-Sep-19 04:12 AM Like comicly not 27-Sep-19 04:13 AM Insane, for sure 27-Sep-19 04:13 AM + if the concrete crumbles, you could sue them and get your money back! 27-Sep-19 04:13 AM just kidding 27-Sep-19 04:14 AM XD 27-Sep-19 04:14 AM Is getting a permit that bad? 27-Sep-19 04:14 AM For an operation like this, yeah, pretty much both coatly and regulatory. 27-Sep-19 04:14 AM If I want it done quick 27-Sep-19 04:14 AM A slab this size is only a days work for rebar and a day to pour 27-Sep-19 04:14 AM With power tooling and sucj 27-Sep-19 04:14 AM I know ot would be quicker, but I have time, not money, in this case. 27-Sep-19 04:14 AM And of I start to put things in the workshop without doing this first, it will never be done. 27-Sep-19 04:16 AM You would still probably be saving money doing it all at once 27-Sep-19 04:16 AM I'll ask about how would be best to small batch this 27-Sep-19 04:16 AM There should be a way 27-Sep-19 04:16 AM Might involve running rebar between slabs 27-Sep-19 04:16 AM But I'll ask 27-Sep-19 04:19 AM Don't worry, it will be a long time of concrete removal first, before I can do anything. 27-Sep-19 04:19 AM Lol yeah you have to take 30k tons out 27-Sep-19 04:19 AM Assuming it's 6" thick 27-Sep-19 04:20 AM I expect that thickness, yes. 27-Sep-19 04:21 AM Have fun 27-Sep-19 04:21 AM But everyone has seen Shawshank Redemption. All it takes is determination and time. 27-Sep-19 04:21 AM A concrete saw will make it much nicer 27-Sep-19 04:22 AM (can't add gifs, shame) 27-Sep-19 04:22 AM Hm 27-Sep-19 04:22 AM I'll have to see why no gifs 27-Sep-19 04:23 AM If the floor is not reinforced, I plan on breaking it hidraulically. 27-Sep-19 04:23 AM No, no, my phone cant add gifs, its my end, not discord 27-Sep-19 04:23 AM https://media.tenor.com/images/006ccb5bdc34d9c8fdb8a314f828bea6/tenor.gif 27-Sep-19 04:23 AM Yup 27-Sep-19 04:23 AM Can confirm 27-Sep-19 04:24 AM Opening a first hole, then just lift with an hidraulic piston until something gives, hopefully small chunks. 27-Sep-19 04:24 AM Is the slab tied to the steem walk? 27-Sep-19 04:24 AM If it is reinforced, I'll get a saw. And a mask, and water... 27-Sep-19 04:24 AM *wall 27-Sep-19 04:24 AM Vacuum makes it much less clean up 27-Sep-19 04:24 AM Vacuum and coolant is a good combo 27-Sep-19 04:25 AM vacuum! 27-Sep-19 04:26 AM Hey! 27-Sep-19 04:26 AM Your right! 27-Sep-19 04:26 AM all hail the vacuum \o/ 27-Sep-19 04:26 AM We can move to on topic! 27-Sep-19 04:26 AM ehehe yeah 27-Sep-19 04:26 AM Any ways I'm calling it a night 27-Sep-19 04:26 AM good night 27-Sep-19 04:27 AM I'm looking forward to the test of the ebeam rig 27-Sep-19 04:27 AM nixies? 27-Sep-19 04:28 AM Yeah 27-Sep-19 04:28 AM yep 27-Sep-19 04:34 AM Me too! 27-Sep-19 04:34 AM Gnait! 27-Sep-19 04:41 AM gnait 27-Sep-19 06:03 AM the idea of assembling spaceflight mass specs seems a bit more interesting today.. but then again, I am also a tool slut and all the tools I am getting are for a specific purpose/project that I want to see through completion 27-Sep-19 06:41 PM https://twitter.com/alexsteacy/status/1177434122215538688 27-Sep-19 08:28 PM why is it called a 'stage' ? 27-Sep-19 08:28 PM ie, translational movement 28-Sep-19 08:23 AM I was just talking to a friend and we had an idea 28-Sep-19 08:23 AM when I was at cern and visited the antiproton decelerator they told us they did some calculations about how long the antimatter stayed in there etc and got a theoretical pressure of 10^-19 mbar 28-Sep-19 08:23 AM and so we were thinking 28-Sep-19 08:23 AM having billions of antimatter particles streaming through there over years 28-Sep-19 08:23 AM would that result in a noticeable pumping rate? 28-Sep-19 08:34 AM Did the calculations involve how long the antimatter stayed in the Penning traps? 28-Sep-19 08:34 AM That's like an ion pump, one with superconducting magnets 28-Sep-19 08:36 AM they didn't really say what they factored in 28-Sep-19 08:36 AM just "based on the lifetime of antimatter in here" 28-Sep-19 08:41 AM Hmm... It's also only like ~10^7 anitproton every 100s. It will be hard to separate the "pumping contribution" from all the other things. 28-Sep-19 11:20 AM Let's do some connector adapters! 28-Sep-19 11:20 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20190928_201741-7E469.png 28-Sep-19 01:04 PM Done! 28-Sep-19 01:04 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG-20190928-WA0006-C7657.png 28-Sep-19 01:25 PM Those get the signals from this: 28-Sep-19 01:25 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/EFcrTQnVAAYX5Ts-F92C9.png 28-Sep-19 01:25 PM It's missing a layer of switches on the blocks of 3. They are setup as inverting and non inverting motor controllers with short circuit protection from both switches pressed at once. (you can't really rely on stupid people to not press the extend and contract buttons at once) XDDd 28-Sep-19 01:25 PM Front, for giggles: 28-Sep-19 01:25 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/EFcrScoU4AAL2CJ-F3E7D.png 28-Sep-19 01:25 PM (it will have some lines for diividing functions and names etc...) 29-Sep-19 01:16 AM "Even on sunny days with cloudless skies, the air carries a voltage of around 100 volts for every meter above the ground. In foggy or stormy conditions, that gradient might increase to tens of thousands of volts per meter." 29-Sep-19 01:16 AM this seems surprising 29-Sep-19 01:16 AM maybe the capacitor is charged to 100 volts per meter but the capacitance is really really low 29-Sep-19 01:25 AM context? 29-Sep-19 05:05 AM That's why you can feel it when you pass under 220kV or 300kV power lines. 29-Sep-19 04:19 PM Hey @Charles, I have a question I'm struggling with a little 29-Sep-19 04:19 PM Are there any readily available chemicals I can use to strip oxides off tungsten wire prior to pinching it in glass? 29-Sep-19 04:19 PM What’s up? 29-Sep-19 04:20 PM KNO2 is basically unavailable here, I'd have to order it online 29-Sep-19 04:20 PM Yes. Agitate in a mix of hydrogen peroxide and ammonia. 29-Sep-19 04:20 PM Store bought ammonia is just fine 29-Sep-19 04:21 PM I reckon my family would kill me if I used ammonia 29-Sep-19 04:21 PM But h2o2 I do have, and I did dissolve some tungsten in it a while ago 29-Sep-19 04:21 PM Why? It’s one of the most common cleaners there is 29-Sep-19 04:21 PM The stink 29-Sep-19 04:21 PM You have to have the ammonia in it 29-Sep-19 04:21 PM You are only doing a tiny amount. 29-Sep-19 04:22 PM I'll look into it 29-Sep-19 04:23 PM Other than that your only other option is to hydrogen fire 29-Sep-19 04:23 PM I thought about going that route but decided not to do that due to the costs and dangers 29-Sep-19 04:24 PM Ok. Back to work 29-Sep-19 04:24 PM o/ 30-Sep-19 02:29 AM @N00N i took mine apart for the same reason, didnt find a good source for imperial bearings yet... 30-Sep-19 02:29 AM if you take yours apart think well before pulling out the regenerator, it may be hard to get it back in 30-Sep-19 03:05 AM oookay 30-Sep-19 03:05 AM i hope that's not necessary 30-Sep-19 03:05 AM I'm optimistic 30-Sep-19 03:05 AM simply cleaning the sht in the excentersection exchange the bearing remove the 10" cf bell. voila 30-Sep-19 03:05 AM @george you needed to remove the regenerator or was it for reverse engineering? 30-Sep-19 04:58 AM it was for cleaning since in mine the dust spread everywhere 30-Sep-19 04:58 AM iirc it was broken motor bearings that spread dust all over thereby ruining the other bearings as well 30-Sep-19 05:25 AM urgs 30-Sep-19 08:47 AM if quality imperial bearings werent so difficult to get by here 30-Sep-19 08:47 AM dont want to refit it with chinese junk from ebay 30-Sep-19 08:56 AM but there isn't much load on the bearings, is there? 30-Sep-19 08:56 AM it's rotating slowly and the piston has little friction in the tube 30-Sep-19 10:18 AM well, the valves springs are sort of strong and i guess the force in the moments of gas inrush can be high as well. The issue with chinese ones is not taht they will be less strong but that they will not last long even unloaded. They will have crappy grease and are put together with no f++++ given and no QC 30-Sep-19 10:18 AM taking the ese things apart is a nightmare and i dont want to do it more often than i have to 30-Sep-19 10:18 AM hmm, ok 30-Sep-19 10:19 AM having a cryopump in good as new conditionis also nice wwithout the thought in the back of your head that you ceaped out on bearings 30-Sep-19 10:23 AM fair enough 30-Sep-19 12:54 PM @george it shipping from these people expensive? 30-Sep-19 12:54 PM https://www.vxb.com/ 01-Oct-19 12:00 PM Finally I got the keys for the workshop today. Tried to do a livestream, but phone signal is mediocre from half of the workshop inwards, and it cut out at just over 2 minutes. 01-Oct-19 12:00 PM https://twitter.com/nixie_guy/status/1179067654998380544 01-Oct-19 12:00 PM I knew it was not going to be a ready to occupy workshop by any means, but the things I have to do scare me a bit. I know everything in there can be fixed, but still. It's going to be a loooooooooong project. 03-Oct-19 09:19 AM So I went today to the workshop, and brought a 5L bottle of water and a 2L bottle of bleach (with perfume). The toilet bowl had dried a looooooooooong time ago, as it had no water supply. The workshop stank of humidity and...not-s**t, but something else. 10 minutes after pouring, the smell was much less noticeable, but, meanwhile that was happening, I turned my attention to the floor. Yesterday I took a look at a particular pothole. I swept it with a broom and I kept sweeping and the pothole kept getting "bigger" (more like shedding particles). So, today I just went at it with a hammer I found lying around. The "aglomerate" just kept breaking down like sand, so I'm suspecting a really bad quality and very thin concrete floor. It also sounds hollow at some points (not many, just a few). Also, just after the entrance, the floor steeply pulls up like 5/7 cm. in a meter or so. My plan would be to remove the floor before that ramp and make everyting flat. The whole floor from entrance to back, raises about 15cm in total over 18m or so. That's steep, I wonder why they just left it that way and did not make it flat-ish. And no, that is not setting sag, they made it that way. Since the back wall has earth all the way (it's made against the mountain it sits on) My plan would be to first dig a trench in that wall, and make a reinforcement wall to prevent any dirt that may dribble from behind the wall if I just removed the floor and suddenly took away 15cm of soil in there. 03-Oct-19 09:19 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20191002_182553-8EBA0.png 03-Oct-19 09:19 AM Broom for scale. Scale-ish, i did not have a meter at hand. The fun one is this one: 03-Oct-19 09:19 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20191002_182608-ED998.png 03-Oct-19 09:19 AM Seems super bad at first glance but then... 03-Oct-19 09:19 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20191002_182730-ADF43.png 03-Oct-19 09:19 AM It's just hollow. The real column is on the outside of that space. 03-Oct-19 09:19 AM Also, here is a rough (estimated, not to scale) map of the workshop floor: 03-Oct-19 09:19 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20191003_055012-13F14.png 03-Oct-19 09:19 AM My plan is to remove the old floor one "slab" at a time, and pour a new one in place, at the right level and compacted ground beneath. 03-Oct-19 09:19 AM (I can start from the front while I do the back reinforced dam) 03-Oct-19 09:58 AM having the concrete right at the ground/sand might not be the best. We use a layer of gravel to break the capillary action. 03-Oct-19 12:10 PM Noted! 03-Oct-19 12:10 PM I don't know yet what will I find underneat the old concrete, will report when I dig a decent hole in there. 03-Oct-19 12:10 PM It's a moisture thing 03-Oct-19 12:10 PM I can use every bit of help given! 03-Oct-19 12:10 PM Also: I have finally decided how I am going to do the workshop ligting (whenever in the future that is). Right now what I have is a bluetooth relay board controlled with a crappily modified serial to bluetooth app on a tablet, that more or less has the workshop layout, and I click on whatever lights I want. That is extremely fancy, and at first I wanted to replicate that. However, I can't program android good enough to make anything more than modifying an already existing open source APP, so, that rules out multipoint light control, and besides, having multiple tablets scatered around the workshop can get expensive fast. Thus, I have reached the conclusion that instead, I am going to make a PCB with the workshop layout, and capacitive sensors where the lights are using TTP223B, wich will communicate with my own wireless light controllers using smd NRF24L01 2.4Ghz modules. (powered with STM32). With that, I can make any number of controllers scattered around the workshop, as they will just comunicate a ON/OFF state to each module. 04-Oct-19 05:34 AM nice 04-Oct-19 05:34 AM i got a couple of flanges for my MS analyser 04-Oct-19 05:34 AM (project for xmas holidays) 04-Oct-19 05:35 AM pics! 04-Oct-19 05:35 AM and a better wirebonder ️ 04-Oct-19 05:35 AM of the flanges? 04-Oct-19 05:38 AM everything 04-Oct-19 05:45 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/image0-076DE.jpg 04-Oct-19 05:45 AM 10" 04-Oct-19 05:45 AM the bonder is still packaged 04-Oct-19 05:45 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/image0-DD48A.jpg 04-Oct-19 05:45 AM f&s 56xx 04-Oct-19 05:47 AM ohh, sexy 04-Oct-19 05:47 AM what's that stub (?) in the flanges? 04-Oct-19 05:47 AM it has full auto mode 04-Oct-19 05:47 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/image0-DFA19.jpg 04-Oct-19 05:47 AM the other side 04-Oct-19 05:47 AM but i want to modify it, was just cheap 04-Oct-19 05:47 AM so i've no idea what the stub was intended for 04-Oct-19 05:52 AM nice 04-Oct-19 05:52 AM very nice catch 04-Oct-19 05:52 AM ebay? 04-Oct-19 05:55 AM yep 04-Oct-19 05:55 AM ah and the gaskets 04-Oct-19 05:55 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/image0-83C36.jpg 04-Oct-19 05:58 AM those alone must have cost an arm and a leg 04-Oct-19 05:58 AM 5 euro per gasket 04-Oct-19 06:01 AM not bad 04-Oct-19 06:02 AM ah and an ersa bga rework station 04-Oct-19 06:02 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/image0-F58FC.jpg 04-Oct-19 06:02 AM todays loot :3 04-Oct-19 06:02 AM but best thing for today is f&s 56xx 04-Oct-19 06:02 AM would spell it with the voice of anni or lauri if i could 04-Oct-19 06:19 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/image0-0F527.jpg 04-Oct-19 06:19 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/image0-34EE3.jpg 04-Oct-19 06:19 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/image0-7A42C.jpg 04-Oct-19 06:23 AM oh damn 04-Oct-19 06:23 AM this can't all be from ebay 04-Oct-19 06:25 AM and a hotplate for preheating the dice/substrate 04-Oct-19 06:25 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/image0-7E7D2.jpg 04-Oct-19 06:25 AM but i forgot the display :(((( 04-Oct-19 06:25 AM jk not that bad the integrated cnc pc has vga and hdmi ^^ 04-Oct-19 06:44 AM That sounds relatively modern 04-Oct-19 06:52 AM jep 04-Oct-19 06:52 AM essentially it's this one https://youtu.be/OIF996p408o 04-Oct-19 07:14 AM nice 04-Oct-19 10:20 AM sweet 04-Oct-19 10:58 AM @N00N if you happen to stumble by another crate full of wire bonders, I want one 04-Oct-19 10:58 AM I want a small manual ball bonder 04-Oct-19 10:58 AM and a few meters of wire 04-Oct-19 11:06 AM @Deleted User ok! 04-Oct-19 06:44 PM dang great score!!! 04-Oct-19 06:44 PM And I had a ball bonder myself but didn't realize what it was before I tore it apart... Also didn't want a ball bonder. I thought it was a wire bonder durp 04-Oct-19 09:40 PM that's exactly what a ball bonder is @Conmega 04-Oct-19 09:40 PM "ball" refers to the type of connection to the surface 04-Oct-19 09:40 PM here's a wedge bond: 04-Oct-19 09:40 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/Schematic-diagram-of-the-ultrasonic-bondin-2B344.png 04-Oct-19 09:40 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/Bond8-A7200.png 04-Oct-19 09:40 PM here's a ball-wedge bond(you can't make ball-ball) 04-Oct-19 09:40 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/Thermosonic-wire-bonding-setup-4B8BA.png 04-Oct-19 09:40 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/fetch-F71B7.png 05-Oct-19 02:54 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20191005_103740-BAA6A.jpg 06-Oct-19 12:35 PM voice chat today? 06-Oct-19 01:27 PM doesn't seem like so 06-Oct-19 01:38 PM I mean I would just pop into voice chat whenever your available and see if people are around. 06-Oct-19 01:38 PM That's how others do it in other servers 06-Oct-19 01:38 PM I'll pop in voice, I'm just going to be vegging on the computer for awhile I guess 06-Oct-19 04:22 PM meh, started to hack back on that opensource ECU project (my last pull from github was in may!) and mostly just jamming out to some music.. maybe I'll wait for the days when everyone is notified 06-Oct-19 04:22 PM starting to get colder, so likely staying indoors more and more (and thus more so available) 06-Oct-19 07:17 PM https://twitter.com/luke_j_obrien/status/1180957944197914624 06-Oct-19 09:08 PM https://www.reddit.com/user/EvanBell117/ 06-Oct-19 09:08 PM his comments are very entertaining 06-Oct-19 09:10 PM https://www.reddit.com/r/nuclearweapons/comments/ct1pzr/north_korea_could_have_100_nuclear_warheads_by/exit3x7/?context=3 06-Oct-19 09:10 PM And very specific numbers when it comes to North Korean nuclear material production capabilities 06-Oct-19 09:35 PM that... is the only mention of 206.25kg 06-Oct-19 09:35 PM either he pulled the number out of his butt, or it's the unlikely possibility that he's actually a NK engineer 07-Oct-19 08:54 AM bombastic 07-Oct-19 08:54 AM how many warheads could we have by 2020? 11-Oct-19 10:40 AM The solder is flowing good this morning. Those who run smt lines know what I mean 11-Oct-19 10:40 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_7294-D64D1.jpg 11-Oct-19 11:11 AM knows what he means Yeah, go, go, go! 11-Oct-19 11:26 AM And like clockwork the pick and place decides to be allergic to its own feeders and reels and not pick up half the parts 11-Oct-19 11:49 AM Dang. 11-Oct-19 11:49 AM Any clues? 11-Oct-19 04:40 PM Probably a weak vacuum at the tips or damaged/stuck nozzle unless there is a gross alignment issue/position tracking issue. 12-Oct-19 01:21 AM Is it viable to DIY a wire bonder? 12-Oct-19 02:23 AM No idea, I'll still try, using an ultrasonic cutter, and a homemade anvil. 12-Oct-19 02:23 AM ask me in a few months 12-Oct-19 02:23 AM (new workshop renovation is going to take me a huge ton of time and resources) 13-Oct-19 10:29 AM Can I have some retweet love for this? 13-Oct-19 10:29 AM https://twitter.com/nixie_guy/status/1183396058698780674?s=19 13-Oct-19 10:29 AM @qualia 13-Oct-19 10:30 AM ok ok :P 13-Oct-19 10:30 AM it's for a workshop... 13-Oct-19 10:30 AM XD 13-Oct-19 10:31 AM in my day, con badges were like. a plastic sleeve with a bit of paper in it 13-Oct-19 10:31 AM nowadays y'all just get whole computers 13-Oct-19 10:31 AM This one is actually pretty cool...But it's been sitting in my drawer since I came back. 13-Oct-19 10:31 AM I can better use some money out of it for the floor renovation and such 13-Oct-19 10:31 AM I'll probably only get insulting offers, but at least I should try. 13-Oct-19 10:31 AM Thanks! 13-Oct-19 10:33 AM 5 bucks and a handshake! 13-Oct-19 10:33 AM I'll swap it for a stick welder 13-Oct-19 10:33 AM I can give you a real good slap and you can sniff the unit for that. 13-Oct-19 10:33 AM Deal! 13-Oct-19 10:34 AM slaps so hard, @GigaSquirrel 's face goes into orbit 13-Oct-19 10:34 AM good luck smelling it from the moon 13-Oct-19 10:34 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/4C3CF0C00C76A83B94F84DEF48141E73EEE8AB3C-66801.png 13-Oct-19 10:34 AM but on the moon I won't need shielding gas for welding and no forepump for my turbo! 13-Oct-19 01:28 PM But also imagine the costs to import anything 13-Oct-19 02:33 PM Don't import with indians, they crash land everything. 13-Oct-19 06:36 PM I never got an 18 supercon badge. I was giving talks and demonstrations and by the time I went over to get it they didn’t have anymore 13-Oct-19 06:36 PM And this year I am not even going. I have a cancer benefit that Saturday night in another part of LA 13-Oct-19 11:14 PM if you never got one, this is your chance! 13-Oct-19 11:14 PM go on and finance nixies Workshop fulfill your dreams! 14-Oct-19 12:54 AM Don't dress it, I need financing for my workshop. 14-Oct-19 10:37 AM https://twitter.com/H_C_Lambda/status/1183790069590695938 14-Oct-19 02:50 PM An update on the nixie thing - NaNO2 works very well for cleaning tungsten wire! 14-Oct-19 02:50 PM https://i.spirit.re/GnkbE.jpg 14-Oct-19 02:50 PM KNO2 will have the same effect. 14-Oct-19 02:50 PM @Charles 14-Oct-19 02:50 PM I heated the tungsten wire up to red hot, dipped in NaNO2 crystals, then melted them on the wire with a gentle heat. All the oxides just vanished immediately, revealing a very shiny wire. 14-Oct-19 02:50 PM The compound is wet, but that doesn't seem to affect its function. 14-Oct-19 02:54 PM Nice 14-Oct-19 02:54 PM NaNO2 is hydroscopic. 14-Oct-19 02:54 PM NaNO2 also slowly oxidizes to NaNO3 in the air. 14-Oct-19 02:55 PM As they tend to be 14-Oct-19 02:55 PM most Na compounds are 14-Oct-19 02:55 PM KNO2 should be less hydroscopic. 14-Oct-19 02:55 PM Yep 14-Oct-19 02:55 PM Yeah, but unobtainium here 14-Oct-19 02:55 PM It's rare in general 14-Oct-19 02:55 PM KNO3 is, but it's useless(since it's got the extra oxygen) 14-Oct-19 02:55 PM Could reduce it with something 14-Oct-19 02:56 PM at least for NaNO3 --> NaNO2 there was talk about various weird ways of reducing it 14-Oct-19 02:56 PM been a decade since I last read up on it. 14-Oct-19 02:56 PM Sciencemadness likely has something 14-Oct-19 02:56 PM melting it with a bit of potassium permanganate should work 14-Oct-19 02:56 PM er, that's for KNO3 16-Oct-19 08:06 AM I got bored at work, so I took apart a cable 16-Oct-19 08:06 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20191016_132649-6EB96.jpg 16-Oct-19 08:06 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20191016_155114-80C52.jpg 16-Oct-19 09:29 AM At these scales it's more of a stick than a cable 16-Oct-19 11:39 AM That would make one hell of a cable pulser, but without the benefit of compactness. 16-Oct-19 11:39 AM A Blumlein line built out of these would go up to so many kV with pulse charging 16-Oct-19 11:40 AM yeah I was thinking the same 16-Oct-19 11:40 AM 250 pf per meter 16-Oct-19 11:40 AM I wonder if people have thought about using them to trigger spark gaps and so on 16-Oct-19 11:41 AM rated for 20 kV for years, I'm gonna say 50 kV for hobby use is just fine 16-Oct-19 11:41 AM took half a meter home with me 16-Oct-19 11:41 AM maybe I can get some more if it's fun to work with 16-Oct-19 04:42 PM ooo 16-Oct-19 04:42 PM at least 50kV.. iirc RG-8 used to be used by spellman & friends for up to about that voltage 16-Oct-19 04:44 PM well they also used UHF-plugs for 30kV... 16-Oct-19 08:23 PM Spellman limits their use of RG-8 to 15 kV nowadays. I wasn't aware that UHF can handle 30 kV though 16-Oct-19 08:23 PM I'm going to try a blumlein pulser based on RG-8 cables DC charged up to 34 kV 16-Oct-19 09:03 PM Half a meter of that cable would be a good defensive weapon! Hahahaha 16-Oct-19 10:54 PM I may have taken half a meter of it with me 16-Oct-19 10:54 PM let's make some use of that LCR meter I have 17-Oct-19 02:06 AM "may have"? 17-Oct-19 02:06 AM You already tod us you did. 17-Oct-19 03:04 AM shhh :P 17-Oct-19 06:19 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20191017_151913-72A40.jpg 17-Oct-19 06:19 AM Oh boy I have missed pcb repair. 17-Oct-19 06:19 AM Even if they are extremely simple to troubleshoot 17-Oct-19 06:19 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/JPEG_20191017_152026-2BD06.jpg 18-Oct-19 04:42 AM Also on my other hobbies... Vintage computing... Got my old teletype setup again :) https://media.discordapp.net/attachments/529468991652233216/634519256595300383/DSC_2790.JPG 18-Oct-19 04:42 AM Who needs 110 baud of mechanical fury? :P 18-Oct-19 04:52 AM /reads: Mechanical Furry/ Lmao 18-Oct-19 05:28 AM What are my options to get two mass flow controllers for my sputter chamber one for Argon and one for 02? (Like expected prices on ebay and such) 18-Oct-19 05:37 AM ask @Vini's Lab if he really needs that many 18-Oct-19 05:40 AM XD 18-Oct-19 06:07 AM @Vini's Lab do you really need all your mfc's? 18-Oct-19 06:10 AM @Nixie I need to think 18-Oct-19 06:11 AM XD 18-Oct-19 06:12 AM @Nixie from my experience in the states you can get them as cheap as 10 bucks for some and upwards of 75 for others... 18-Oct-19 06:12 AM Honestly I'd say an average price for the standard analog control MFCs generally cal'd from the factory for N2 (you just use conversion charts to know how much of other gasses will flow) you'll be paying like 20 bucks a pop for decent finds, after shipping and if you just want similar models and buy it now stuff probably like 30-40 bucks a pop. 18-Oct-19 06:12 AM But if you keep an eye out and hunt 25 should be do-able. 18-Oct-19 06:12 AM I know in europe they have different models available so I can't really help you with that but yea just start searching ePay 18-Oct-19 06:14 AM well, that's for the states... ^^ 18-Oct-19 06:15 AM I swear I was talking to someone here who said that they were scoring these wonderful digitally controlled MFCs for like 50 bucks a pop over there... and I looked over here and there was like one on ePay for like 500 bucks 18-Oct-19 06:16 AM Thanks! I see I shoukd be able tonget them at an affordable price (I was expecting like 200€ per unit or something) 18-Oct-19 06:21 AM @Conmega that was me 18-Oct-19 06:21 AM 35 bucks a pop for 3 burkert 7811 18-Oct-19 06:25 AM Would be a shame if two of those fell in a cardboard box with a spaniard adress that might or might not be lying around in your workshop. A real tragedy... 18-Oct-19 06:25 AM 18-Oct-19 06:25 AM /starts training for psi powers/ 18-Oct-19 06:44 AM please, here it's called bar powers 18-Oct-19 06:52 AM Bar powers? 18-Oct-19 06:52 AM Barionic powers? 18-Oct-19 06:52 AM /psi -> psionic powers/ 18-Oct-19 06:53 AM I know, but bar / psi... 18-Oct-19 06:53 AM I'd like to have baryonic Powers 18-Oct-19 06:53 AM like being heavy 18-Oct-19 06:53 AM oh wait 18-Oct-19 06:55 AM just drop mfc's in the box 18-Oct-19 06:57 AM xD 18-Oct-19 06:58 AM /sweat droplets form in his temples/ -hmm, not sure if actually sending suggestions to a brain or i am heavily constipated- 18-Oct-19 07:03 AM you need to do some cardio before you do anything else 18-Oct-19 07:03 AM :P 18-Oct-19 07:03 AM I would give you one mfc if all three had the same flow rate 18-Oct-19 07:03 AM but two are suitable for vacuum, and one is 25 slpm 18-Oct-19 08:07 AM XD 18-Oct-19 08:07 AM I will get in time, donut worry 18-Oct-19 09:51 AM @Conmega yay @ teletype! i bought another one just yesterday... 18-Oct-19 11:54 AM Bought another teletype? Or MFC? lol 18-Oct-19 11:57 AM teletype. Lorenz Lo15 18-Oct-19 11:57 AM i have one with every feature that was available, but never understood how to take it apart to clean it... so i bought another one without all the features just so i could take that one apart and understand how it all fits together 18-Oct-19 12:03 PM Hmm 18-Oct-19 12:03 PM sort of want an Argon MFC now 18-Oct-19 12:03 PM Or a cheap N2 one 18-Oct-19 03:47 PM i have a couple i've been meaning to hook up and play with 18-Oct-19 03:47 PM all of my swagelok-y hardware is just collecting dust rn and that seems like a shame 18-Oct-19 04:15 PM I gave my tiny oxygen cylinders to my friend to fill up with argon and co2 laser mix(to help him refill dead co2 lasers) 18-Oct-19 04:15 PM I'm not looking forward to finding out how much a bundle of swagelok-y hardware that will enable me to backfill things with gas will cost me 18-Oct-19 04:30 PM From what I recall, swagelok was not horrifically expensive. 18-Oct-19 08:24 PM Wow. I just looked up the prices of current CT tubes. I have to go dig out that byrillium sheet and start trying to make them! Holy smokes. You only have to sell a few every now and then and you would be making serious money! 18-Oct-19 08:25 PM Make a <5um >5W x-ray tube for me while you're at it 18-Oct-19 08:25 PM I'm sure every hobbyist would line up to buy a friendlier-priced microfocus tube 18-Oct-19 08:25 PM X-ray CT microscopy is just as interesting as SEM in my opinion 19-Oct-19 03:09 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20191019_101822-6D6EF.jpg 19-Oct-19 03:09 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20191019_101838-89555.jpg 19-Oct-19 03:09 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20191019_110609-171C4.jpg 19-Oct-19 03:09 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20191019_101855-C32AF.jpg 19-Oct-19 03:09 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20191019_102107-FDD9A.jpg 19-Oct-19 03:09 AM uff 19-Oct-19 03:09 AM too bad I had to leave the magnet there 19-Oct-19 03:09 AM but I also left a card, they should contact ne once they start dismanteling it 19-Oct-19 05:50 AM wth 19-Oct-19 05:50 AM what happened to it? plane crash 19-Oct-19 06:54 AM dang 19-Oct-19 07:40 AM I left nyo card, they'll give me a call once they start taking apart the magnet 19-Oct-19 07:40 AM I need some of that Wire 19-Oct-19 08:31 AM where is this junkyard you go to?? 19-Oct-19 08:31 AM I'd like to know of similar ones in the US, more than just machinery surplus/resales 19-Oct-19 08:40 AM Munich ^^ 19-Oct-19 08:40 AM nice, there are two of those in there https://www.idealvac.com/files/manualsII/Alcatel_MDP-5010_Turbo_Drag_Pump_Manual.pdf 19-Oct-19 08:40 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/unknown-B35A9.png 19-Oct-19 09:20 AM OH WOW 19-Oct-19 09:20 AM open one, open one! 19-Oct-19 09:31 AM @GigaSquirrel if by any chance you don't need one of those turbodrags, can has? 19-Oct-19 09:31 AM They'd be perfect for making tubes, since if one shatters, the turbodrag can survive full atmosphere inrush without exploding instantly. 19-Oct-19 09:33 AM sorry, one for me, one for @Pan Da ^^ 19-Oct-19 09:33 AM d'aww 19-Oct-19 09:33 AM but oildiffs survive atmosphere as well 19-Oct-19 09:33 AM with silicone oil 19-Oct-19 09:33 AM except oildiffs explode when that happens 19-Oct-19 09:33 AM literally 19-Oct-19 09:33 AM I wonder why pure turbodrags fell out of popularity 19-Oct-19 09:33 AM I've been hunting for an affordable one ever since I found out that turbomolecular pumps turn into turbomolecular soup if you surprise them with air 19-Oct-19 10:01 AM I found out that turbomolecular pumps turn into turbomolecular soup if you surprise them with air 19-Oct-19 10:01 AM This is going into my wall of fame. 19-Oct-19 10:05 AM The kind of stuff I collect in « garbage » 19-Oct-19 10:05 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/image0-BE280.jpg 19-Oct-19 10:05 AM Next time I visit Pfeiffer I’ll try to find some used turbos for you spirit 19-Oct-19 10:05 AM I go there more or less every 3-4 months 19-Oct-19 10:16 AM I'd appreciate that! :P 19-Oct-19 10:16 AM I actually talked to Pfeiffer about the controller schematics for my TPH-062 19-Oct-19 10:16 AM They said it was impossible to get and it was proprietary info 19-Oct-19 10:16 AM ... then I sent them the schematic 19-Oct-19 10:17 AM "there you go maybe this will help you for your bext request" 19-Oct-19 10:19 AM once I build my 5-axis mini machining center(somewhere loooooooong in the future), I will try making tiny turbopumps 19-Oct-19 10:22 AM Good luck with that. 19-Oct-19 10:23 AM Once I have the money for that, I will also be smarter and more skilled 19-Oct-19 10:23 AM (I think) 19-Oct-19 10:29 AM I was not being sarcastic, I meant it. The challenge is interesting, and such rotational speeds become interesting in any material. (as a miniature turbo will need to rotate upwards of 200k rpms). 19-Oct-19 10:29 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/unknown-2C09C.png 19-Oct-19 10:29 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/unknown-67B9A.png 19-Oct-19 10:36 AM Yeah, that's the only reference for micro turbos I could find 19-Oct-19 10:36 AM Aside from the tiny rectangular pfeiffer turbo 19-Oct-19 10:36 AM I believe the turbos in that presentation were sent to mars 19-Oct-19 12:13 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20191019_202144-CCDFE.jpg 19-Oct-19 12:13 PM I didn't know that was drinkable. 19-Oct-19 12:13 PM wrong kind of alcohol 19-Oct-19 12:13 PM in every sense of the word 19-Oct-19 12:18 PM Mahou seems to disagree. 19-Oct-19 12:36 PM @Nixie IPAs are not drinkable.. you need to go to a darker beer, like a stout or porter, preferbly barrel aged 19-Oct-19 01:10 PM https://gigabecquerel.wordpress.com/2019/10/19/mass-spectrometry-isotope-enrichment-and-particle-beams/ 19-Oct-19 01:22 PM I need to annex that scrapyard 19-Oct-19 01:22 PM Also, the DIY metal->glass lathe addon is a go! 19-Oct-19 01:22 PM https://i.spirit.re/KZRqS.JPG 19-Oct-19 01:22 PM Now I need to put a motor on the second chuck, and an encoder on the main chuck 19-Oct-19 01:23 PM nice! 19-Oct-19 01:28 PM those mass analyzers look so simple 19-Oct-19 01:28 PM but then you realize those blocks of metal have math inside them 19-Oct-19 01:29 PM honestly it's not too bad 20-Oct-19 05:11 AM those mathaddicts 20-Oct-19 06:05 AM Wooho, the drag from the scrapyard wekz! 20-Oct-19 06:07 AM yay 20-Oct-19 06:07 AM its so awesome how quiet it is 20-Oct-19 06:33 AM yeah 20-Oct-19 06:50 AM https://twitter.com/GigaBecquerel/status/1185915854237720577 20-Oct-19 09:17 AM Aaaand that's exactly why I want a turbodrag. It's alive, in air! 20-Oct-19 09:17 AM I found something really interesting. We know FLIR's Ex series cameras(E4, etc) and Exx(E30, E50, etc) can be hacked to full 320x240 resolution, but nobody has yet touched their newer models - Ex3 and Ex5(E53, E75, etc), T6xx, T1xxx. Turns out, they're hackable too. I just got a file dump from one of them(I don't own one) and... well, I can't disclose much, but all I can say is that FLIR's security is somewhere between zero and unpatched windows XP. 20-Oct-19 09:17 AM ... I have a T440bx... swapsies? ;) 20-Oct-19 09:56 AM I have one of these Alcatel spectrometer if anyone needs to build an isotope separator ( the exact same model as yours !) 20-Oct-19 10:00 AM heh, nice 20-Oct-19 10:01 AM The magnet is just damn cool on the fridge however xD 20-Oct-19 10:01 AM What my wife calls « the primary mess » 20-Oct-19 10:01 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/image1-8091E.jpg 20-Oct-19 10:01 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/image0-C1696.jpg 20-Oct-19 10:01 AM And the « secondary mess » : 20-Oct-19 10:01 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/image1-00800.jpg 20-Oct-19 10:01 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/image0-C75AE.jpg 20-Oct-19 10:01 AM Which of course is by no way a mess, it’s a compact former-toilets-vertical-holography-lab 20-Oct-19 10:12 AM Lol 20-Oct-19 10:13 AM That’s the holograms I can produce in this former toilets : https://youtu.be/j1aKSggiWN4 20-Oct-19 10:13 AM I see a diaper box, do you have a kiddo? 20-Oct-19 10:13 AM 4 kids yeah lol house of full of diapers 20-Oct-19 10:13 AM Must have kinda all sizes lol 20-Oct-19 10:13 AM Cardboxes are very effective as selective trashes 20-Oct-19 10:14 AM @Black Lemming very very cool! 20-Oct-19 10:14 AM I've got a toddler now 20-Oct-19 10:15 AM that's a very cool Workshop 20-Oct-19 10:15 AM I tried to initiate my big one to holography but eheh.. mum does not comply with my safety equipment 20-Oct-19 10:15 AM At least not for to-grow kids 20-Oct-19 10:15 AM Bleh... dichromate-potassium is not for kids any way 20-Oct-19 10:16 AM what age? 20-Oct-19 10:16 AM 8months 3 years 6 years and 8 years 20-Oct-19 10:16 AM Hannibal, Olympe, Cassiel and Anouk 20-Oct-19 10:18 AM 6 & 8 is just the right age to get 'em started! 20-Oct-19 10:18 AM Yeah lol 20-Oct-19 10:18 AM Just have to comply with mum’s regulations lol 20-Oct-19 10:18 AM - no nuclear - no cancerigene - no mutagene - no cut members 20-Oct-19 10:18 AM Basically.. we play at maths on black board & theorize stuff right now 20-Oct-19 10:20 AM I read that as "no cult members" 20-Oct-19 10:20 AM Lol 20-Oct-19 10:20 AM no injury allowed 20-Oct-19 10:22 AM there's nothing about high voltage, lasers, particle accelerators and such 20-Oct-19 10:22 AM so you're good to go 20-Oct-19 10:22 AM Haha my kiddo sits with me in my FIB/SEM room 20-Oct-19 10:22 AM I just hope he doesn't throw any toys at it, or spit on it 20-Oct-19 10:22 AM Mainly though I hope I don't bore him with it, and he turns to the dark side of athletic sporting!!! 20-Oct-19 10:24 AM When I was moving my SEM out of the seller's garage on Friday, his 5 year-old kid was playing hide-and-seek around the SEM 20-Oct-19 10:24 AM He must have said "go inside" more than 50 times throughout the night 20-Oct-19 10:32 AM My SEM used to be in my home office which became our main bedroom after my son was born, since it has an attached bathroom... And I definitely had to teach him not to try grabbing things inside the SEM. The immediately touchable component was the high voltage tank 20-Oct-19 10:34 AM What the heck SEM stands for ? 20-Oct-19 10:34 AM scanning electron microscope 20-Oct-19 10:34 AM fib is focused ion beam 20-Oct-19 10:34 AM a SEM but you throw ions at the target and can mill objects at the nanoscale 20-Oct-19 10:34 AM A « microscope à balayage électronique » i believe we call it in France 20-Oct-19 10:34 AM Must be quite big of a toy 20-Oct-19 10:35 AM Oh yeah 20-Oct-19 10:35 AM entirely not intended to be owned and tinkered with by nerds 20-Oct-19 10:36 AM Every load bearing muscle in my body hurts after disassembling and lifting that thing 20-Oct-19 10:36 AM Might have torn a tendon or something in my right shoulder too... 20-Oct-19 10:37 AM but now you have a SEM 20-Oct-19 10:37 AM Some SEMs fit into a backpack these days 20-Oct-19 10:37 AM Yeah, and a lot of work to get it working again 20-Oct-19 10:37 AM @nmz787 coincidentally about the same volume of gold required to own one 20-Oct-19 10:37 AM I’ll have to find one of these one day then xD 20-Oct-19 10:37 AM Well that's not the case 40 years ago 20-Oct-19 10:37 AM Can’t we build one ? 20-Oct-19 10:38 AM that's what I'll be trying to do 20-Oct-19 10:38 AM Search for Applied Science's series of videos on his homemade SEM 20-Oct-19 10:38 AM @Deleted User nah, gold is going for $1500/troy oz these days... Those backpack SEMs only cost $50k... I think that's less than a backpack full of gold 20-Oct-19 10:38 AM SEMs are stupid simple in theory 20-Oct-19 10:38 AM and very very not simple in practice 20-Oct-19 10:39 AM Well depends on yhe resolution you want to achieve 20-Oct-19 10:39 AM I have a friend who's dad was a vacuum engineer, and they built a SEM in a weekend once... Only attained sub mm resolution though 20-Oct-19 10:40 AM at which point it's like... a scanning electron... scope 20-Oct-19 10:40 AM ( from basic components like transistors) 20-Oct-19 10:40 AM Well sub mm is still MICROn 20-Oct-19 10:41 AM for me, a SEM is a serious SEM once it reaches beyond what optical can do 20-Oct-19 10:41 AM which is around 500nm, practically 20-Oct-19 10:41 AM (unless you're weird and do that UV imaging thing) 20-Oct-19 10:41 AM Then they should really be called a nanoscope 20-Oct-19 11:27 AM My e-beam litography should work as a sem too, but just to 10um 20-Oct-19 11:27 AM So nowhere near as useful as sem 20-Oct-19 11:27 AM 10 microns.. you could mill that! 20-Oct-19 11:28 AM Yes, but I don't want any mechanical contact/contamination of the wafer. 20-Oct-19 11:28 AM I may have to go into school today to 'dress' my screwdrivers for a small quiz thing tomorrow 20-Oct-19 05:30 PM did done it.. and now it's basically night, ughf 21-Oct-19 09:19 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/unknown-21BF3.png 21-Oct-19 09:19 AM Yellow sub...Chamber... 21-Oct-19 09:32 AM I like that the video is titled as if it's a tutorial 21-Oct-19 09:32 AM yep, will do 21-Oct-19 11:18 AM Hmm, that's about the reactor height I need to put in a 2ft per side square for anti adhesive coating 21-Oct-19 10:58 PM https://www.youtube.com/watch?v=ZhbIDMZTUXI Wheeeeeeeee 21-Oct-19 11:59 PM a flange for it is already on its way, so I can machine an adapter to KF and really test it 21-Oct-19 11:59 PM ultimate pressure is e-6, but with up to a mbar foreline pressure 21-Oct-19 11:59 PM that, combined with the low pumping speed kinda makes it perfekt for a fusor 22-Oct-19 02:09 AM It’s far from full speed ! It’s not meant to operate at atmospheric exhaust pressure, chain it after a primary pump and you’ll triple speed 22-Oct-19 02:09 AM By the way how did you hack that PCB to run it without command center xD ? 22-Oct-19 02:09 AM I have this one for PCB controller and no clue how to start it. I powered it with -18V through the DB15 pins 7 and 9, transformer seems buzzing happily but nothing happens xD 22-Oct-19 02:09 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/image0-D0482.jpg 22-Oct-19 03:07 AM the older PCB simply has a start stop switch 22-Oct-19 03:07 AM normally 22-Oct-19 03:07 AM the ones out of this leak tester didn't even have those, apparently they got switchef on and off from the brains of the machine simply by switching mains on and off 22-Oct-19 03:28 AM I have the feeling this cards requires dual powering, one for power and one for TTL logic, powering the transformer does not seem to power up the logical circuit.. 22-Oct-19 03:30 AM strange. on ours the transformer produces both voltages 22-Oct-19 03:30 AM 35V for the driver and around 15V for the logic 22-Oct-19 03:30 AM ohhh wait, what connector to the pump does your card have? 22-Oct-19 03:36 AM DB15 seems to admit input power current and provides output cable to a round 8ish pins connector to pump 22-Oct-19 03:36 AM ahh, ok 22-Oct-19 03:36 AM I don’t like the idea to provide 35V through a DB15 lol 22-Oct-19 03:37 AM ours has a 10 pin connector to the pump, of which 5 are for the motor, 2 for a "running" relay output and 3 for an external start/stop button 22-Oct-19 03:37 AM sooo... maybe yours also wants some kind of enable 22-Oct-19 03:38 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/image0-13D49.png 22-Oct-19 03:38 AM ah, that's the plug also on my 5011 22-Oct-19 03:38 AM the 5010 unfortunately uses another plug and the older controller... 22-Oct-19 03:38 AM do you know the type of that controller? 22-Oct-19 03:40 AM P0090-D 22-Oct-19 03:52 AM hmmmmm 22-Oct-19 03:52 AM i found a video with this driver for a demonstration, but it doesn't show the connections... 22-Oct-19 04:02 AM no circuit of the driver available? 22-Oct-19 04:02 AM the one for mine is in the datasheet for the pump 22-Oct-19 04:03 AM for his, i can't even find any reference to that board in alcatel literature... 22-Oct-19 04:06 AM They’re kinda protective xD 22-Oct-19 04:06 AM every single controller by alcatel i can find has the 10-pin-plug we have on ours 22-Oct-19 04:07 AM damn that sucks 22-Oct-19 04:07 AM are you sure it's a controller? xD 22-Oct-19 04:07 AM pretty much, yes - as it connects directly to the pump 22-Oct-19 04:09 AM fair enough 22-Oct-19 04:09 AM btw, since people were asking 22-Oct-19 04:09 AM https://gigabecquerel.wordpress.com/2019/10/22/molecular-drag-vs-turbomolecular-pump/ 22-Oct-19 04:14 AM HA, i found it 22-Oct-19 04:14 AM the controller probably comes out of an ASM180 leak detector 22-Oct-19 04:14 AM alcatel parts number is 072402 22-Oct-19 04:14 AM but that's the only information i could find... 22-Oct-19 04:14 AM apparently, you need to reverse engineer the pcb @Black Lemming 22-Oct-19 08:21 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20191022_171521_999-8E53D.jpg 22-Oct-19 08:21 AM this cracks me up every time I read it 22-Oct-19 08:23 AM do what you want 'cause a pirate is free 22-Oct-19 08:26 AM yarrr! 22-Oct-19 08:30 AM Yea well usually that's worded like, for optimal bearing life install vertically, can be run in other orientations but bearings may need service sooner. 22-Oct-19 08:33 AM there is a detailed section on bearing life, but it only mentions temperature and vibrations as a factor 22-Oct-19 08:34 AM interesting 22-Oct-19 08:34 AM Surely being on its side gives a different load an wear characteristics on the bearings. 22-Oct-19 08:34 AM Probably not significantly enough for you to care though with your use... I'd assume if the bearings go out you'll be finding another pump not repairing it... Seems cheaper to find another used pump half the time, especially if you have the controller already! 22-Oct-19 08:40 AM and the manual of my drag pump calls for bearing lubrication after 16000 and 32000 and replacement after 48000 hours... 22-Oct-19 09:02 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/unknown-DE460.png 22-Oct-19 09:02 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/unknown-1BBEC.png 22-Oct-19 09:02 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/unknown-97CFC.png 22-Oct-19 09:38 AM The latests are mag-lev now 22-Oct-19 10:07 AM they sure are 22-Oct-19 10:07 AM but this one is from the 80s 22-Oct-19 10:45 AM 80s rox ! I was born in 81 22-Oct-19 10:50 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/unknown-D3EC7.png 22-Oct-19 10:50 AM Lol ebay 22-Oct-19 10:52 AM Lead-chocolate ! 22-Oct-19 11:02 AM sort of want, but not that strongly 22-Oct-19 01:26 PM 'anti-atomic elements' is a strangely endearing phrasing 23-Oct-19 07:32 AM https://twitter.com/GigaBecquerel/status/1186950209009532929?s=19 23-Oct-19 07:32 AM https://media.tenor.com/images/2b92e657d8979c9fcf8ba838b0e2c3c9/tenor.gif 23-Oct-19 08:09 AM If you confirm HTS, and you get more, can you throw a bunch on Das Packet? 23-Oct-19 08:12 AM sure will! 23-Oct-19 08:14 AM Yay! 23-Oct-19 08:16 AM yay indeed 23-Oct-19 08:18 AM What is HTS wire and why is it special/interesting? 23-Oct-19 08:18 AM High temperature Superconductor 23-Oct-19 08:18 AM high temperature superconductor 23-Oct-19 08:18 AM Basically doesn't require helium 23-Oct-19 08:18 AM but will work with nitrogen 23-Oct-19 08:18 AM Oooo 23-Oct-19 08:18 AM (you are too slow, @GigaSquirrel ) 23-Oct-19 08:18 AM wow... 23-Oct-19 08:19 AM (liquid nitrogen) 23-Oct-19 08:19 AM Think you could through a bit of that in with my powersupply? hehehe 23-Oct-19 08:19 AM /power supply gets short circuited/ 23-Oct-19 08:19 AM XDDDD 23-Oct-19 08:19 AM sure, I'll take everyones order xD 23-Oct-19 08:19 AM Holy... That's one of the best scores I've ever seen. If end up with any left over, how much would you want for a few kgs? 23-Oct-19 08:19 AM dunno if it is still there, atm I only have 3 m 23-Oct-19 08:19 AM "a few KG's..." That's a bit too much to ask, methinks 23-Oct-19 08:20 AM yeah there is a few kg in the picture 23-Oct-19 08:20 AM Yeah, but theres a limit on what you will be able to actually take/carry 23-Oct-19 08:20 AM oh no we will take everything 23-Oct-19 08:21 AM ah...ha 23-Oct-19 08:21 AM XD 23-Oct-19 08:21 AM how often do you get a chance like that 23-Oct-19 08:21 AM ok, three to 5 times by now 23-Oct-19 08:21 AM XDDD 23-Oct-19 08:21 AM but I only realized it this time 23-Oct-19 08:21 AM I meant the state of the ribbon, and such 23-Oct-19 08:21 AM In any case, we would need to test it to ensure it goes superconducting. 23-Oct-19 08:21 AM at LN2 temps 23-Oct-19 08:21 AM and it's not just damaged 23-Oct-19 08:22 AM yepyep 23-Oct-19 08:28 AM well if you can't get anymore I don't need it but I do have that cold head now so I could use it hehe 23-Oct-19 08:30 AM oh dang that's right 23-Oct-19 08:30 AM you're definitely getting some 23-Oct-19 08:30 AM hehe 23-Oct-19 08:30 AM I'll do the stupidest possible thing with it first, like run RS-232 over it, then I may actually do something useful 23-Oct-19 08:30 AM yaknow since I am going to make a silicon fab maybe I should try and make q-bits... 23-Oct-19 08:31 AM :D 23-Oct-19 08:32 AM I am not sure if the band material can be repurposed, can it? 23-Oct-19 08:32 AM (Like, no idea on my end) 23-Oct-19 08:33 AM I know a lot of the quantum chips look really large process 23-Oct-19 08:33 AM probably not that crazy of an idea to make at home, just couldn't really get it cold enough and have precise enough equipment to have a low enough noise floor... 23-Oct-19 08:33 AM but could probably do some test that proves it works somehow even with all the noise 23-Oct-19 08:33 AM or just run it long enough and get enough samples 23-Oct-19 08:34 AM Do you have a drawing of how the quantum chip is actually made? (I mean, like cross sections of silicon chips, but for that) 23-Oct-19 08:35 AM most of the stuff I have seen looks like this 23-Oct-19 08:35 AM https://www.extremetech.com/wp-content/uploads/2014/09/Qubit-architecture-640x411.jpg 23-Oct-19 08:35 AM like really large feature size 23-Oct-19 08:35 AM https://data1.ibtimes.co.in/cache-img-0-450/en/full/652448/1498300827_google-quantum-computing-chip.jpg 23-Oct-19 08:35 AM for example 23-Oct-19 08:35 AM I'll need to get a multi stage cryo-head if I am going to do this though... 23-Oct-19 08:35 AM Maybe I can borrow a spare from the IBM Q installation at work.. 23-Oct-19 08:37 AM XD 23-Oct-19 08:37 AM I could use one of these to sputter niobium (seems it's the base materal for qbits) 23-Oct-19 08:37 AM https://www.ebay.com/itm/1-gram-1g-USA-Bear-999-Pure-Niobium-Bullion-Bar-Nb-Element/283493747919?hash=item42018b4ccf:g:pWEAAOSw-wNc4WT5 23-Oct-19 08:49 AM I've actually got a project on trying to make a small Josephson standard at my lab (i'm at a university though...); If you use a regular 2-stage GM- cooler off a cryopump (~1-2K on eBay + some labgrade helium) you can reach ~8K, not enough for Niobium but plenty for Niobium Nitride (16K). We've got an old Varian 3119 E-Beam system w/ a cryopmp we're modifying to hopefully one day be able to do some of this. NbN is fairly easy to sputter, but you need to use RIE w/ fluorine to etch it properly. Thermally deposited/ reactively sputtered SiO2 is all you need for an isolator, and as long as you don't need too complex a lithography setup, a modified DLP- projector can be more than good enough. JJs aren't complex devices, circuits with them just need insane magnetic shielding to work well. You can make these circuits with cuprates aswell, but getting good quality films typically need really well adjusted complex reactive sputtering processes or MBE, and getting the orientation right for actual superconduction is not easy. Ething is also far worse. Most metallic superconductors need pulse tubes or better to teach Tc, and most ceramics are generally a pain to deposit. 23-Oct-19 09:29 AM Making QBits is pretty much impossible for hobbyists, if you want useful coherence times in anything, even nuclear spin qbits almost certainly need dilution cooling. You both need to spend 50K on He3 and the massive gas handling and separation system, and probably another 50K+ for even old used hypersensitive microwave gear, shielding and all the other annoying stuff you need to go through in order to do a single computation. There's a reason only large companies and major universities play with the stuff. RFSQ stuff, SQUIDs and soforth are however far more forgiving and cheap although you still need massive magnetic shielding to keep the circuits from behaving like magnetometers (unless that's what you want of course). Only downside to using HTS and nitrogen cooling is larger current noise and more vortex formation. 23-Oct-19 09:50 AM Cool to know on the NbN, I am building an RIE to use with SF6 for silicon etch anyway so I will have that. I only have a single stage cryo-head atm setup, but I can find a dual stage no problem used I am sure. I got my single stage and helium compressor for like 300 bucks at surplus working and filled already. 23-Oct-19 09:50 AM Hrm interesting, I mean honestly the qbits thing is probably more-so a fun, learn about the process and maybe make some chips not necessarily have the equipment to run it. Its a growing industry so if I can learn about the process without going for a PHD and getting a few million in debt at some big university then yea... May-aswell. 23-Oct-19 09:50 AM But my main goal is of-course just making a standard CMOS process work. 23-Oct-19 11:39 AM Dunno about the microwave gear part. Old used microwave gear is much worse than the stuff you can get off digikey. Noise figures and power consumption has plumeted. 23-Oct-19 11:39 AM What bands would be used for something like that? 23-Oct-19 12:01 PM Not gonna try to do qbits, the anything for cryo temps is just impossible for me to get anyways. I will be happy if I manage some micromachining/MEMS at home. 23-Oct-19 12:10 PM mhm! 23-Oct-19 06:05 PM Flux QBits work at a few GHz, Phase QBits work at a few 10's of GHz and Charge Qbits work at ~10's of MHz down to DC (coherence time limited lower bound) but need Single-Electron Transistors. If you start making your own ultra-low noise HEMTs and Quantum Hall Effect Gyrators, you start talking mildly semi-feasible quantum computing for the most incessantly devoted hobbyists. This is getting into seriously exotic land, but if you could use a regular 2-stage GM/PTR cryocooler with a 3. Paramagnetic Salt- Adiabatic Demagnetization Refrigeration stage with some very clever thermally isolating feeds, you might, MIGHT get down to usable temperatures. But by this point you've entered and gone past crazyland. A ~5um simple CMOS process or some mems stuff seem far more feasible to do at home. Nixie, are you planning to make a DRIE setup? 24-Oct-19 01:32 AM sub 0.2dB NF in room temperature is hobbyist reality today af few GHz 24-Oct-19 01:32 AM And normal cheap (like under 5usd/pcs to under 1usd/pcs) pHEMT's and GaAs-fets can be used to make low power low noise amplifiers that work at cryogenic temperatures. 24-Oct-19 01:32 AM I have a friend who did that in uni more than a decade ago. 24-Oct-19 01:32 AM ~1GHz preamp in some quantum science thing with liquid helium and hydrogen. 24-Oct-19 08:07 AM @hanstj Again I wouldn't really go that direction with the goal of getting something working. More to learn about the processes involved and learn about the technology. I do appreciate the theory crafting and speaking about the technology! Definitely great stuff to know about. Also I am not looking to do mems (although I may play with it) I am more-so looking to just do a standard CMOS process to reproduce either old chips or design my own. Always something I dreamed of doing :) 24-Oct-19 08:28 AM https://twitter.com/desynews/status/1187305228661477377 25-Oct-19 03:49 AM woohoo, I survived the test phase at my job and they took me 25-Oct-19 03:49 AM bonus: I now get a bit more money for half the hours 25-Oct-19 11:04 AM score :D 25-Oct-19 11:04 AM congrats on job 25-Oct-19 11:48 AM Yea congrats!! 25-Oct-19 04:48 PM Congrats 26-Oct-19 12:13 AM Thanks ^.^ 28-Oct-19 03:40 PM My MKS 901P vacuum gauge vanished somewhere after being shipped outside the US :( 28-Oct-19 03:40 PM I guess there goes $50 I'll never get back, because I used a reshipper 28-Oct-19 04:49 PM thats rough, hopefully it shows up and there was just an issue with tracking 28-Oct-19 04:58 PM it's been more than two months now 28-Oct-19 04:58 PM oh well that does not bode well 28-Oct-19 04:58 PM well, close to two 28-Oct-19 04:58 PM Hey, that happened to me too 28-Oct-19 04:58 PM But I'm in the US 28-Oct-19 04:58 PM it was delivered to the reshipper 28-Oct-19 04:58 PM then vanished afterwards 28-Oct-19 04:59 PM i did have a box with some stuff from china take 4 months to arrive one time after getting stuck in customs limbo 28-Oct-19 04:59 PM but that was china->usa not usa->the world 28-Oct-19 04:59 PM My package showed up on tracking as delivered but I never actually got it 28-Oct-19 05:00 PM what sort of agreement do you have with the reshipper? dont suppose there is any liability on their end 28-Oct-19 05:04 PM meh, it wasn't that expensive so I won't chargeback the reshipper 28-Oct-19 05:04 PM and the seller is not at fault here, so I'm not touching him 28-Oct-19 05:05 PM https://www.ebay.com/itm/MKS-VACUUM-LOADLOCK-TRANSDUCER-901P-11040-Tested-Guarantee/253958599268?ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p2057872.m2749.l2649 28-Oct-19 05:05 PM We're talking about the same seller right? 28-Oct-19 05:05 PM I did contact him and he insisted that he got the address correct... I didn't bother with it too much since it's not too expensive. I might just buy one again though because I need another foreline gauge again for the SEM conversion 28-Oct-19 05:18 PM Yeah, mine arrived at the reshipper and vanished afterwards 29-Oct-19 01:38 AM Why use a reshipper? 29-Oct-19 01:38 AM Was the shipping so much different? 29-Oct-19 02:31 AM https://twitter.com/difluorine/status/1189088586622099457?s=19 29-Oct-19 10:08 AM god 29-Oct-19 10:24 AM good to know 29-Oct-19 10:55 AM XD 29-Oct-19 03:40 PM I wonder what sort of vacuum a car/truck turbocharger would develop? 29-Oct-19 03:42 PM maybe 2/3 atmospheric at most 31-Oct-19 12:57 AM I just turned over my lab looking for a tiny baggie of tiny viton orings They vanished. Without a trace. I touched every single object that I recall touching since receiving the baggie Even went through the machining trash can on the other side of the room, it's gone If anyone suddenly finds themselves in possession of ten 5.5mm ID/7mm OD green viton orings in a plastic baggie, please document the world's first case of highly contextual teleportation I will report back if I find it in my sock drawer. 31-Oct-19 02:13 AM This sort of thing happens to me every so often... A visceral knowledge of what an item looks and feels like, only to search endlessly and not find it. 31-Oct-19 12:18 PM Same teleportation behavior happens regularly with my laser pointers, especially the dangerous ones. For some unexpected reasons there is a fall-back gravity distortion or teleporting beacon in my daughter’s desk drawer. 31-Oct-19 12:18 PM I’ll check her drawers for your orings. 31-Oct-19 12:28 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/image0-23AF0.jpg 31-Oct-19 06:10 PM Ahhhh... you are playing the hide it from yourself game. I am a master of that one. 02-Nov-19 05:38 AM @Deleted User I might have a baggie of said orings. Can't check right now, I'm on a road trip. 02-Nov-19 11:14 AM But it's probably not my baggie 02-Nov-19 11:29 AM Yes we should @GigaSquirrel 02-Nov-19 11:29 AM or the mods will get angry 02-Nov-19 11:29 AM I've wented my oildiff to armosphere once 02-Nov-19 11:29 AM all it did was flush its oil down the drain 02-Nov-19 11:29 AM quick wash with lighter fluid, new oil and boom 02-Nov-19 11:29 AM ofc it's not as convenient as a drag pump, but oildiffs are cheaper 02-Nov-19 11:31 AM I really want the mistakes to not cost $50 each :P 02-Nov-19 11:31 AM eh, my pump wants 15 ml xD 02-Nov-19 11:31 AM your pump is also so tiny 02-Nov-19 11:31 AM although with a drag it'd be of equal power 02-Nov-19 11:32 AM still three times the pumping speed of my drag xD 02-Nov-19 11:32 AM but a drag can be shut down by venting! 02-Nov-19 11:32 AM no, even more 02-Nov-19 11:32 AM my entire chamber is tiny, probably under 2l 02-Nov-19 01:26 PM https://i.redd.it/03oeeg9ifbw31.png 03-Nov-19 03:09 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20191103_120916-61571.jpg 03-Nov-19 03:09 AM ...how 03-Nov-19 03:12 AM temperature 03-Nov-19 03:27 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20191103_122538-36A48.jpg 03-Nov-19 03:27 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20191103_122512-98050.jpg 03-Nov-19 03:27 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20191103_122547-24615.jpg 03-Nov-19 03:27 AM @Conmega 03-Nov-19 03:27 AM this is where the fun begins 03-Nov-19 03:27 AM I wonder what connector output B would have been 03-Nov-19 03:31 AM is that output A a C connector? 03-Nov-19 03:31 AM C, N and PL 03-Nov-19 03:31 AM and is loadmatch PL? 03-Nov-19 03:31 AM ...nice 03-Nov-19 03:31 AM you know where you can always drop off those C connectors ^^ 03-Nov-19 03:32 AM if I took the thing apart for parts 03-Nov-19 03:32 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20191103_123130-5F1DD.jpg 03-Nov-19 03:32 AM someone was serious about input isolation 03-Nov-19 03:32 AM (or wasn't and so the filter was installed on the outside as an afterthought?) 03-Nov-19 03:32 AM we will never know 03-Nov-19 03:34 AM Awesome, looks really clean 03-Nov-19 03:34 AM is really clean 03-Nov-19 03:34 AM MADE IN SWITERLAND 03-Nov-19 03:35 AM now lemme see if I have some of those push on connectors, they've become somewhat of a rarity here 03-Nov-19 03:36 AM puch on connectors? 03-Nov-19 03:36 AM I don't know their name in english 03-Nov-19 03:36 AM the thingies on the filters input 03-Nov-19 03:39 AM spade terminals? 03-Nov-19 03:39 AM yes 03-Nov-19 03:57 AM now lets wait until all the pumps have spun down and then I'll plug it in 03-Nov-19 03:57 AM the front panel switch is "standby" and "stop" 03-Nov-19 03:57 AM so... I guess "stop" is off? 03-Nov-19 03:57 AM going from stop to standby turns on the internal fans 03-Nov-19 03:57 AM none of the fault lamps light up 03-Nov-19 03:57 AM but I don't have the sub D for controlling the thing, so that's as far as testing will go today 03-Nov-19 03:57 AM oh wow 03-Nov-19 03:57 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20191103_130534-55E85.jpg 03-Nov-19 03:57 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20191103_130541-3DB93.jpg 03-Nov-19 03:57 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20191103_130548-54104.jpg 03-Nov-19 03:57 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20191103_130605-8568E.jpg 03-Nov-19 03:57 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20191103_131059-E4218.jpg 03-Nov-19 03:57 AM I can only imagine the horrors going on inside of this thing 03-Nov-19 04:12 AM oh wow 03-Nov-19 04:12 AM a design where the fans are actually blowing cool air through the heatsinks of the hottest parts 03-Nov-19 04:12 AM i'm amazed! 03-Nov-19 04:12 AM right? 03-Nov-19 04:12 AM further tearing down will be left for connor 03-Nov-19 04:24 AM well, at least on this unit 03-Nov-19 04:24 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20191103_132340-6283E.jpg 04-Nov-19 09:16 PM Soo I am gonna make a PCI sniffer using and FPGA, to shed some light on my FIB's image capture (and scan generator I think) card 04-Nov-19 09:16 PM Saw the Dragon PCI board, but it lacks RAM, and I think I need more sample depth since I dont know when to trigger for a start of a frame 04-Nov-19 09:16 PM Nor do I know how long the frames are 04-Nov-19 09:16 PM Thinking of trying to seat this onto a PCI riser: 04-Nov-19 09:16 PM https://www.ebay.com/itm/Xilinx-Spartan-6-XC6SLX16-2FTG256-FPGA-development-board-128MB-DDR3/273776025727 04-Nov-19 09:16 PM 128MB of RAM 04-Nov-19 09:16 PM That's a 96 pin RAM chip 04-Nov-19 09:16 PM While this one only uses 54 https://www.ebay.com/itm/XC6SLX16-Spartan-6-Xilinx-FPGA-Development-Board-w-32Mb-Micro-SDRAM-Memory/222739647376 04-Nov-19 09:16 PM But only 32 MB 04-Nov-19 09:16 PM So not sure if the GPIO on the headers are all available or not 04-Nov-19 09:16 PM 128 pins avail on GPIO 04-Nov-19 09:24 PM Why are you going at it from the hardware end? 04-Nov-19 09:24 PM well, headers 04-Nov-19 09:24 PM Just do it in software 04-Nov-19 09:24 PM Reverse-engineering the driver will be infinitely easier 04-Nov-19 09:25 PM Just cause I want to hone my skills on FPGAs, and found sniffer verilog https://www.fpga4fun.com/PCI3.html 04-Nov-19 09:25 PM Also it's Windows XP, so getting a compilation environment for something like tiny_tracer sounds wayyy less fun 04-Nov-19 09:25 PM i hate compiling things on Windows 04-Nov-19 09:26 PM Just throw the driver into IDA 04-Nov-19 09:26 PM The driver has to be separate from the exe? 04-Nov-19 09:26 PM Like some DLL? 04-Nov-19 09:27 PM .sys 04-Nov-19 09:27 PM PCI drivers are kernelmode 04-Nov-19 09:27 PM Find out which drivers are loaded, throw the custom card one into IDA 04-Nov-19 09:33 PM Hmm 04-Nov-19 09:33 PM Easy enough to try 04-Nov-19 09:33 PM I don't have to get off the couch 04-Nov-19 09:33 PM Well maybe to get my wife's laptop 04-Nov-19 09:33 PM You'll want to run it on the fib computer 04-Nov-19 09:33 PM To see which drivers are loaded 04-Nov-19 09:33 PM Unless you know which ones are loaded and have a dump of it 04-Nov-19 09:36 PM Hmm, do they make versions of IDA for WinNT? 04-Nov-19 09:36 PM not ida, you'll just want a tool to see loaded drivers 04-Nov-19 09:36 PM I was thinking the PCI sniffer would be useful for older systems like that 04-Nov-19 09:36 PM Ah ok, I got some PCI info dumper 04-Nov-19 09:37 PM https://docs.microsoft.com/en-us/sysinternals/ 04-Nov-19 09:37 PM probably something from here 04-Nov-19 09:38 PM Oh, I was gonna use "Craig's PCI programs" 04-Nov-19 09:39 PM whatever works 04-Nov-19 09:39 PM Found it on archive.org last week 04-Nov-19 09:39 PM Oh, actually I already know what the .sys file is 04-Nov-19 09:39 PM It listed it in device manager 04-Nov-19 09:43 PM Yep, see what IDA says 04-Nov-19 09:43 PM Share it here to take a look 04-Nov-19 09:52 PM OKI driver from FIB 04-Nov-19 09:52 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/scan2drv-5D6FB.sys 04-Nov-19 09:54 PM well, there's not much in it 04-Nov-19 09:54 PM a total of 70 functions 04-Nov-19 09:55 PM Seems like a reasonable amount 04-Nov-19 09:55 PM do you know which executable talks to it? 04-Nov-19 09:55 PM .text:00011AE8 00000022 C (16 bits) - UTF-16LE Device\\scan2drv0 .text:00011B0C 00000022 C (16 bits) - UTF-16LE Device\\scan2drv1 .text:00011B30 0000002A C (16 bits) - UTF-16LE DosDevices\\scan2drv0 .text:00011B5C 0000002A C (16 bits) - UTF-16LE DosDevices\\scan2drv1 .text:00011E54 0000002A C (16 bits) - UTF-16LE DosDevices\\scan2drv0 .text:00011E80 0000002A C (16 bits) - UTF-16LE DosDevices\\scan2drv1 04-Nov-19 09:56 PM I think 04-Nov-19 09:56 PM these are the ioctl handles 04-Nov-19 09:56 PM if there's a .pdb file with it, that'd be helpful 04-Nov-19 09:57 PM http://diyhpl.us/~nmz787/pdf/smi3200/ScanBoard/ 04-Nov-19 09:58 PM no debug info 04-Nov-19 09:58 PM There's some more exes, in another dir, one sec 04-Nov-19 10:00 PM scan2ctl.dll is what actually talks to the driver 04-Nov-19 10:00 PM https://i.spirit.re/xYN3h.png 04-Nov-19 10:01 PM http://diyhpl.us/~nmz787/pdf/smi3200/software/ 04-Nov-19 10:01 PM added the Exec folder with the main GUI 04-Nov-19 10:01 PM hmm, but I still don't know the sequence of the calls, right? 04-Nov-19 10:01 PM that's where I was thinking some instrumentation of the EXE would help to print out said sequence 04-Nov-19 10:01 PM but, need XP compilation env setup first 04-Nov-19 10:01 PM or the PCI sniffer, then match somehow to the driver dump 04-Nov-19 10:03 PM you should be able to sniff pci in software 04-Nov-19 10:04 PM this is the main EXE I think diyhpl.us/~nmz787/pdf/smi3200/software/Exec/SmiAppProject.exe 04-Nov-19 10:16 PM @Deleted User I see him in ##sillycon these days, but yeah he doesn't idle unfortunately 04-Nov-19 10:16 PM Thanks 09-Nov-19 12:51 AM @chucrut wow had no idea about the situation in chile until I saw your posts... protect your vacuum gear! 09-Nov-19 03:59 AM Many thanks @Nixie and @nmz787 09-Nov-19 03:59 AM I'm thinking what to do with my money in case Chile becomes Venezuela 09-Nov-19 05:55 AM oh jeez 09-Nov-19 05:55 AM buy a ticket to somewhere else? 09-Nov-19 05:55 AM looks like the perfect time for leaving that country 09-Nov-19 05:55 AM is the countryside 'safe'? 09-Nov-19 08:34 AM @chucrut cryptos? 09-Nov-19 08:34 AM and if not, what's the goal and target? germany? 09-Nov-19 10:24 AM convert it to dollars 09-Nov-19 11:35 AM The target could be San Francisco 09-Nov-19 11:35 AM Or Lukas house 09-Nov-19 11:36 AM SF isn't much better than those videos you posted 09-Nov-19 11:37 AM People say in SF jobs are very well paid 09-Nov-19 11:38 AM Cost of living is super high though, but yeah if you're in a position to get one of the tech jobs, you might do OK. 09-Nov-19 11:38 AM It's pretty close to a developing country though 09-Nov-19 11:38 AM Do you suggest another place? 09-Nov-19 11:38 AM I'm open to move anywhere 09-Nov-19 11:38 AM I can live in the streets 09-Nov-19 11:42 AM I live near Portland Oregon... 09-Nov-19 11:43 AM There are tech jobs in Portland? 09-Nov-19 11:43 AM I need to be clear. I'm not gay 09-Nov-19 11:55 AM now why do you need to be clear about that? 09-Nov-19 11:56 AM In case @nmz787 is suggesting to live together 09-Nov-19 11:57 AM but what does that have to do with anything? 09-Nov-19 11:59 AM I guess portland has a reputation down south. 09-Nov-19 12:04 PM SF is more gay, I think 09-Nov-19 12:04 PM But yes, this is called Silicon Forest 09-Nov-19 12:04 PM Lots and lots of tech jobs 09-Nov-19 12:04 PM And no, as much as I'd like some extra income, my house isn't setup for a boarder 09-Nov-19 12:06 PM Jajaja 09-Nov-19 12:07 PM I was literally reading about having a boarder last night, but, I have a kid and wife so it seems incompatible 09-Nov-19 12:08 PM I was in SF this year. I think jobs are mainly programming 09-Nov-19 12:08 PM I google building says "I love APIs" 09-Nov-19 12:08 PM I traveled to China 1 month, so I passed by SF 09-Nov-19 12:13 PM I'm a programmer by day, but I can't bring myself to work on anything too far from hardware or science/engineering 09-Nov-19 12:14 PM Me too. I prefer microntrollers programming, physics, etc. I hate APIs 09-Nov-19 12:15 PM APIs are fine, if they're for doing hardware stuff ;) 09-Nov-19 12:15 PM You are right 10-Nov-19 12:46 AM i would go to texas 10-Nov-19 07:29 PM A engine I rebuilt just blew up in spectacular fashion 10-Nov-19 07:29 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/FullSizeR-A476E.jpg 10-Nov-19 07:29 PM Connecting rod and bearings flew out of the case with a massive fireball 10-Nov-19 07:29 PM No one was hurt 10-Nov-19 07:30 PM Nice 10-Nov-19 07:30 PM Oh that bad 10-Nov-19 07:30 PM Yikes 10-Nov-19 07:30 PM Yeah, it had a good life, lasted two years longer than I expected 10-Nov-19 07:30 PM It looks like the culprit was deterioration of the oil viscosity over time when we run the engine super hot. The bearings on cyclinder 3 seized and everything just blew up 10-Nov-19 07:30 PM It's a Honda CBR600RR motorcycle engine from eBay, with many parts from other engines thrown in it. A true frankenmotor 10-Nov-19 07:30 PM Failed at 15500 RPM right at the redline 10-Nov-19 07:41 PM Post-mortem 10-Nov-19 07:41 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/JPEG_20191110_224054-D2C38.jpg 10-Nov-19 09:31 PM What was it powering, normally at least? 10-Nov-19 09:31 PM A motorcycle? 10-Nov-19 09:35 PM A FASE racecar 10-Nov-19 09:35 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/60221169_2118193904896043_7840728897841790-E9206.png 10-Nov-19 09:35 PM It originally came from a motorcycle yeah 10-Nov-19 09:48 PM In this case a crashed motorcycle that had a damaged frame so engine was sold separately 11-Nov-19 11:26 AM Oops 11-Nov-19 01:56 PM Nice, I've seen bigger bike engines used for kit cars before 11-Nov-19 03:37 PM Displacement is limited in our competition and we run a tiny 20mm restrictor, so this is the biggest engine really. Barely makes 100 hp 11-Nov-19 04:20 PM Haha well my diesel jetta is only like 110 or 130HP 11-Nov-19 04:22 PM People run tiny KTM single cylinder engines that only make like 50 hp just to get the weight down 11-Nov-19 04:22 PM Even with this 4 cylinder our car weighs just a little over 400 lbs 11-Nov-19 08:25 PM "only like 110 or 130HP" I take offense to that :P 11-Nov-19 10:18 PM Much different power to weight ratio from what it looks like in your picture 11-Nov-19 10:18 PM I think my truck is closer to 300, but it's not important enough to me to remember exactly 13-Nov-19 06:58 AM hahaha my fusor forum account works again! 13-Nov-19 06:58 AM the forum is even worse than I remembered xD 13-Nov-19 07:48 AM I haven't visited in forever lol. I'm tempted, but at the same not 14-Nov-19 05:58 PM I was surprised no one there was talking about why not to use silicone oils in SEM diff pumps. I guess they're so focused on fusor stuff which presumably doesn't matter about getting the walls covered in sludge 15-Nov-19 12:22 AM sludge hummer 15-Nov-19 11:39 AM I was told by the old timers silicone is to be used in anything that gets baked above the vapor temp of the silicone. Past that you are into the “Expensive Stuff” conversely the expensive stuff is to never be used in pumps that might accidentally go to air such as pumping tubes. 16-Nov-19 12:53 AM Screenshot (Nov 16, 2019 12:53:27 AM) 16-Nov-19 12:53 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/Screenshot_20191116-005327-6F3C0.png 16-Nov-19 12:53 AM I'm getting some on-topic advertisements in my news reading 16-Nov-19 02:51 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20191116_103015-E61F5.jpg 16-Nov-19 02:51 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20191116_103021-CFF12.jpg 16-Nov-19 02:51 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20191116_094654-A8951.jpg 16-Nov-19 02:51 AM did I ever mention how much I love our scrapyard? 16-Nov-19 03:54 PM hehe nice 16-Nov-19 03:55 PM I don't need those big flanges, will clean them, check for obvious defects and 'prolly sell them here 16-Nov-19 04:04 PM cool! 17-Nov-19 04:38 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20191117_133641-1E5B1.jpg 17-Nov-19 04:38 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20191117_133650-B686A.jpg 17-Nov-19 04:38 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20191117_133656-3220E.jpg 17-Nov-19 04:38 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20191117_133704-736F2.jpg 17-Nov-19 04:38 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20191117_133715-8C580.jpg 17-Nov-19 04:38 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20191117_133723-42205.jpg 17-Nov-19 04:38 AM any ideas on wth this thing is? 17-Nov-19 06:25 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20191117_144507-FA876.jpg 17-Nov-19 06:25 AM things to do on a sunday afternoon at 5°C 17-Nov-19 09:41 AM @GigaSquirrel looks like it's an ion trap of sorts 17-Nov-19 09:41 AM But magnetic? 17-Nov-19 09:41 AM it almost looks like a stripped down IGP 17-Nov-19 09:43 AM yeah it's a bit weird 17-Nov-19 09:43 AM someone guessed it's a faraday cup, the magnets are there to trap released electrons 17-Nov-19 10:12 AM is it a fancy micro-cassette eraser? 17-Nov-19 10:14 AM hehe 17-Nov-19 10:56 AM it's cute 17-Nov-19 11:00 AM that's for sure 17-Nov-19 01:49 PM looks like the detector on the mass-spec chamber I bought a few weeks ago 17-Nov-19 01:49 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/wsG__WGjj8CeP7RDulpAk5NBbav1dfG02RR7JqvqX1-8F6E2.png 17-Nov-19 01:49 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/LpF3a009JAbsJ6V2CZ2dvPNtQmQAAcbQomzvfJNDVD-D2FC6.png 17-Nov-19 09:21 PM just watched the How It's Made on Zeiss light microscopes, pretty good. 18-Nov-19 12:02 AM https://media.tenor.com/images/0b3e8f533ef1ad6057a2fa384c87ba8b/tenor.gif 18-Nov-19 12:02 AM I found a company on productronica that does glass to metal seals and asked if I cound have some feedthroughs 18-Nov-19 12:02 AM Just got an e-mail "please tell us your adress" 18-Nov-19 12:02 AM and a CC to someone, basically "Just send him 10 M12 connectors and 50-100 of whatever we have lying around" 18-Nov-19 12:02 AM thats awesome! 18-Nov-19 12:02 AM ohhh boy 18-Nov-19 12:02 AM I guess this is the best motivation to finish up my rotary welding table 18-Nov-19 01:28 AM That seems awfully generous, I'll need their info asap 18-Nov-19 01:28 AM 50-100 of... Standalone pins, right? 18-Nov-19 01:57 AM I have no idea tbh xD 18-Nov-19 01:57 AM "und ca. 50 St. – 100 St.  AEM beschichtet oder unbeschichtet – was wir eben haben." 18-Nov-19 01:57 AM no idea what that means 18-Nov-19 01:57 AM but hey 18-Nov-19 01:57 AM free stuff \o/ 18-Nov-19 04:10 AM nice! 18-Nov-19 05:28 AM anyone ever use s1800 series photoresists? 18-Nov-19 08:28 AM @meowter_space We want pics of your cat! 18-Nov-19 08:28 AM oh, and the MS as well 18-Nov-19 08:28 AM sigh bare with 18-Nov-19 08:28 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20191030_232417_1-83887.jpg 18-Nov-19 08:28 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/received_552661068805349-1DC16.jpeg 18-Nov-19 08:28 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_9h0itq-D9D96.jpg 18-Nov-19 08:28 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/received_996322990704512-3F9D2.jpeg 18-Nov-19 08:28 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20191006_205526_529-4BAE4.jpg 18-Nov-19 08:28 AM Here's my idiot cat. His name is Miles 18-Nov-19 08:30 AM so cute <3 18-Nov-19 08:30 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/received_397680177779476-DC0E2.jpeg 18-Nov-19 08:30 AM Here's the mass spec all in one piece 18-Nov-19 08:30 AM It's now in many many pieces 18-Nov-19 08:32 AM nice! 18-Nov-19 08:32 AM any plans with it or is this one of those "it was too cheap not to get" things? 18-Nov-19 08:33 AM I'm going to use parts to complete my FIM/APT rig, but tbh there's so many cool things in there like lasers! and UHV translators that I feel i have to do something more with it 18-Nov-19 08:36 AM What's FIM / APT? 18-Nov-19 08:37 AM Field Ion microscope / Atom probe Tomoscope 18-Nov-19 08:37 AM ya get a very cold, atomically sharp tip, whack a laser at it or a high voltage through it and mash some He+ into it, then let the ejected ions mash into a phosphor screen / microchannel plate / DLAD 18-Nov-19 08:37 AM It's like the first experiment to ever gain atomic resolution 18-Nov-19 08:37 AM I was struggling with APT for a while but all these mass spec parts mean I have TOF stuff to do APT if i want 18-Nov-19 08:37 AM which is hecking awesome 18-Nov-19 08:37 AM also comes with 1 metric butt tonne of HV (EHT) stuff 18-Nov-19 08:37 AM @mike crb just seen is interested in TOF Mass spectrometry 18-Nov-19 08:53 AM That’s so sweet! What is your ion source? Whenever I eventually have the money/supplies I think I’m gonna try for maldi-tof setup 18-Nov-19 08:55 AM In ATP? You just start with HE (polarised) and it ionises itself when it bounces off the tip through magical quantum tunnelling! 18-Nov-19 08:55 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/FIM1_fim1-1048C.png 18-Nov-19 08:55 AM That's the most basic of setups ^ 18-Nov-19 08:56 AM Oh I meant in your mass spec when it was together! But that’s really cool never seen ATP stuff before 18-Nov-19 08:57 AM ahh no, I haven't actually gotten a chance to play with the mass spec while working I understand how it works and have a lot of parts though! I'd love to get it working again but I feel like that's a whoooole new project that I shouldn't embark on until I finish this one 18-Nov-19 08:57 AM I think my biggest challenge for this one is Cryo though 18-Nov-19 08:59 AM Aw gotcha 18-Nov-19 08:59 AM reading quick into fim/apt this is actually such a cool technique 18-Nov-19 09:03 AM it really is. APT builds massively on FIM. APT tends to do TOF more and can do 3D rendering, but FIM gives prettier diagrams :D Also can use pretty much the same setup to do Helium Ion Microscopy 18-Nov-19 09:37 AM Apparently that NASA spaceflight mass spec assembly job may still be available.. The guy who bench teated isn't being offered enough 18-Nov-19 10:48 AM Now to swoop in and undercut him, all for the chance to eat ramen but have NASA on you resume!!! 18-Nov-19 11:38 AM @GigaSquirrel https://i.spirit.re/M5f9o.jpg 18-Nov-19 11:38 AM ha 18-Nov-19 11:38 AM those solar panels are from me as well xD 18-Nov-19 11:47 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/unknown-BDF11.png 18-Nov-19 11:47 AM and so it begins 18-Nov-19 11:52 AM not many of them can say this though 18-Nov-19 11:52 AM https://i.spirit.re/X269m.png 18-Nov-19 11:53 AM because of all the good content you provide 18-Nov-19 11:53 AM oh wait 18-Nov-19 11:54 AM I promise I'll tweet something cool sooner or later 18-Nov-19 01:03 PM oh, and even fewer can say this 18-Nov-19 01:03 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/unknown-61D7A.png 18-Nov-19 01:03 PM oh damn 18-Nov-19 01:03 PM and way fewer can say this: https://twitter.com/TobiMax7/status/1195297147966627842 18-Nov-19 02:42 PM Who is Marco Reps? 18-Nov-19 02:46 PM https://www.youtube.com/user/reppesis 18-Nov-19 02:46 PM highly recommended electronics youtuber 18-Nov-19 02:56 PM questionable opinions about usb-c but well-produced videos with humour reminding me of thisoldtony 18-Nov-19 06:43 PM giving more thought into this spaceflight mass spec assembly gig.. the question may be: would I ever leave school early for the job? 18-Nov-19 08:50 PM @Noxz hard question... I fought wanting to drop out of college from my second quarter until I graduated. 18-Nov-19 08:50 PM It's questionable whether I'd be doing better now, or feel like I'm doing better 18-Nov-19 09:06 PM I dropped out my second year of actual college when I was 19.. never finished, and it was super difficult to do much of anythign without a degree, till I got my foot in the door 18-Nov-19 09:06 PM if they could wait a year, then it could be possible, but it seems like they want someone asap 18-Nov-19 09:06 PM the track I am on right now is a certification program sort of thing.. so "always" (how long will it be around for?) take the exam (all in one sort of thing) later as a possibility 18-Nov-19 09:06 PM plus... I have never planned to work inthe industry, but just to make my own watches 18-Nov-19 09:06 PM which is the main reason I dont want to go for the job.. it would take time away from goal #1 18-Nov-19 09:06 PM at t his point, we're just learning watches and some refinishing and such 18-Nov-19 09:06 PM I almsot feel that I would be half-way better having no industry influence (never work in watch service) when I go to manufacture my own 19-Nov-19 08:00 AM I'm graduating only 6years late. And I want to do that to be done with it and to increase my job prospects 19-Nov-19 08:00 AM Graduating should also add something around 500-2500eur to my monthly pay depending on the place 19-Nov-19 08:00 AM as then I'd have formal qualifications in addition to just work experience 19-Nov-19 10:02 AM @Noxz working at nasa on instruments seems like good hand eye coordination practice, but not really watchmaking. Much different market and funding stream, probably a much different workplace vibe. I'd guess it wouldn't soil you. 19-Nov-19 10:02 AM I know one guy with a PhD who worked at NASA and then quit after disliking the environment. 19-Nov-19 10:20 AM Just finished 1-on-1 with instructor.. He basically said I should apply to them 19-Nov-19 10:20 AM Apparently more manufacturing than not, which is right up my alley 19-Nov-19 04:47 PM Marco's new video on the SPI pulsed laser makes me want to buy one again 19-Nov-19 06:38 PM I plan on writing up a cover letter/intro for that NASA thing 19-Nov-19 09:37 PM finally done writing it up 20-Nov-19 06:12 AM just sent resume/cover letter.. she/they are on east coast time, so already 9am over there 20-Nov-19 07:14 AM Good luck! 20-Nov-19 10:23 AM Hey I somehow get a CB radio stuff here, I see there are 40 channels but all give me noise only. Is there anything I should know about my antenna xD ? 20-Nov-19 10:28 AM yes 20-Nov-19 10:28 AM but CB is relatively short range 20-Nov-19 10:50 AM I'd blame the antenna 20-Nov-19 10:50 AM Or that you just don't have that mcuh traffic where you are 20-Nov-19 10:50 AM yeah I was just going to say 20-Nov-19 10:50 AM even a known good system doesn't pick up much, there just isn't that much traffic 20-Nov-19 10:51 AM If in USA tune to 19AM or Channel 6, 27.025 MHz "Superbowl" as one has truckers and the other has high power stations 20-Nov-19 10:56 AM I’ll install the antenna on my house roof to expand the range xD 20-Nov-19 11:01 AM Yeah that should help 20-Nov-19 07:46 PM no response from NASA yet 20-Nov-19 11:43 PM Let's cross our fingers, as scientifically as possible. XDDD 20-Nov-19 11:43 PM First to get the job, invites to something to drink. 20-Nov-19 11:43 PM (tl:dr lost job due to unforeseen circumstances, waiting for a nice offer to answer) 21-Nov-19 01:40 AM Btw everyone the new admin color is the h alpha hydrogen emission line because I thought that was cool. 21-Nov-19 06:03 AM Nixie, my bet is on you.. mostly because another student was already told by them that they wanted someone sooner than when school finishes.. but he couldn't tell them the difference between KF and conflat (never got far enough to be asked, but still) 21-Nov-19 06:51 AM Well...crossed fingers 21-Nov-19 09:09 AM @Nixie i seem to recall you're in Italy? If you get the NASA job you'd at least be closer to some of us here in the states 21-Nov-19 09:09 AM :) 21-Nov-19 09:42 AM LOL, no, Spain. 21-Nov-19 09:42 AM But not actually able to switch countries. 21-Nov-19 09:42 AM (but Italy is close-ish enough culturally) 21-Nov-19 09:42 AM I found this job offer for "SMD repair, product prototyping, warehouse managing" wich looks very promising. 21-Nov-19 09:42 AM (I guess you have to receive the damaged things, help the design department with prototypes and repairs, and send out the repaired wares) 21-Nov-19 09:42 AM (and have two trump cards on my sleeve, but would prefer not to use them if possible) 22-Nov-19 07:05 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20191122_141047-64802.jpg 22-Nov-19 07:05 AM they were serious when they said 50-100 pcs... 22-Nov-19 07:05 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20191122_141107-F065C.jpg 22-Nov-19 07:05 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20191122_141120-E1525.jpg 22-Nov-19 07:05 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20191122_141145-0AE0D.jpg 22-Nov-19 08:42 AM feedthroughs?? 22-Nov-19 08:43 AM lots of them 22-Nov-19 08:45 AM nice! 22-Nov-19 08:45 AM oh yes 22-Nov-19 08:45 AM I asked for some samples at the productronica fair, expected like 5 or 10 in total... 22-Nov-19 08:58 AM hehe 22-Nov-19 08:58 AM may need to get a few of those in my box if you haven't packed it yet hehehe 22-Nov-19 08:58 AM may make me need to get a welder faster :) 22-Nov-19 09:00 AM sorry, already shipped ^^ 22-Nov-19 09:00 AM I can really recommend getting a welder tho 22-Nov-19 09:08 AM hehe fair enough, can always do another box another day, doesn't seem like you have a shortage of good stuff showing up over there :P 22-Nov-19 09:08 AM or we'll just do a meetup at my place some day 22-Nov-19 09:09 AM heh that would be fun 22-Nov-19 09:43 AM hi 22-Nov-19 10:16 AM heyo 24-Nov-19 09:00 AM What company? Might be good to know if I ever need to buy them for a product 24-Nov-19 09:03 AM https://www.dietzegroup.com/en/ Here are the wonderful people 24-Nov-19 09:03 AM the issue is, that they don't mass produce any connectors, but only make custom parts 24-Nov-19 09:03 AM you tell them what you need and they fabricate it in the 100s to 1000s 24-Nov-19 09:16 AM hrm might be-able to do some kind of group buy in the future 24-Nov-19 09:16 AM design something that fits everyone's general needs and just get a bulk 24-Nov-19 09:17 AM just flood ebay with weldable feedthroughs for everyone 24-Nov-19 09:17 AM there is that too selling the extra there 24-Nov-19 09:19 AM when I talked to them at the fair I was told that in the 1000s we're talking about 30-50 ct for those small feedthroughs and ~10€ for the M12 ones 24-Nov-19 09:19 AM hm 24-Nov-19 09:20 AM so yep, not exactly cheap 24-Nov-19 09:20 AM (holy hell I just now realized how much they sent me) 24-Nov-19 09:23 AM They probably gave you extras from some massive run 24-Nov-19 09:23 AM Basically scrap to them 24-Nov-19 09:52 AM yep, for sure 24-Nov-19 09:52 AM but still... 24-Nov-19 03:07 PM Yep 24-Nov-19 03:07 PM Damn that's nice of them 24-Nov-19 07:14 PM I’m more interested in getting about 10K pieces of dumet three piece leads which it looks like they make. Don’t want to go back to China for them. 24-Nov-19 09:32 PM Dumet? I suppose with your equipment, soda lime doesn't present a challenge, stress-wise 25-Nov-19 12:07 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/GM-1069-ZB1-0_Gld_M12x1_Schweiring-14E78.pdf 25-Nov-19 12:07 AM I got a Datasheet for the M12! 25-Nov-19 12:08 AM nice 25-Nov-19 12:08 AM 500 bar! 25-Nov-19 12:08 AM assuming the weld hold that :D 25-Nov-19 12:09 AM hehe yea 25-Nov-19 12:09 AM I wonder if you will have problems with thermal stress with welding? 25-Nov-19 12:10 AM I've been told to weld it quick, but no need to set a new record 25-Nov-19 12:10 AM ss is a bad thermal conductor, and as long as the glass is heated evenly it should be fine 25-Nov-19 12:11 AM what you them there need is a multi-gun frankenstein welder 25-Nov-19 12:11 AM one strike and look, it's welded all the way around :P 25-Nov-19 12:11 AM (I wouldn't be surprised if this thing actually exists) 25-Nov-19 12:13 AM :D 25-Nov-19 12:13 AM nah, my new welding jig should be fine 25-Nov-19 12:13 AM Did you ask if the company will work with individuals? 25-Nov-19 12:14 AM They'll work with everyone 25-Nov-19 12:14 AM ... in loooow quantitiiiies? 25-Nov-19 12:14 AM sure 25-Nov-19 12:14 AM they have no issues with making a single part for you 25-Nov-19 12:14 AM ... and charging you 5k for that 25-Nov-19 12:15 AM about that 25-Nov-19 12:15 AM hehe 25-Nov-19 12:19 AM but maybe, if I work on my relations there 25-Nov-19 12:19 AM off the shelf line items at a low price would be a great supply for hobby designs 25-Nov-19 12:19 AM maybe we can organize something we can work with 25-Nov-19 12:19 AM passing volts and radiobeams into the expensive nothingness 25-Nov-19 12:19 AM and out! 25-Nov-19 12:20 AM Wow that's poetical 25-Nov-19 12:20 AM reminds me of the inofficial slogan of a german vacuum hardware manufacturer 25-Nov-19 12:20 AM it's a less painful way to say "wow this pipe costs $150" 25-Nov-19 12:21 AM "we sell nothing and the less is in there the more expensive it is" 25-Nov-19 12:21 AM that could apply to any vacuum manufacturer 25-Nov-19 12:21 AM if you think about it, pressure-related things generally cost sin(abs(p)) 25-Nov-19 12:22 AM :D 25-Nov-19 12:22 AM how about a ~M5 copper rod as a feedthrough 25-Nov-19 12:22 AM that sounds like fun 25-Nov-19 12:24 AM great for evap boats 25-Nov-19 12:24 AM all the current for heating and whatnot 25-Nov-19 12:24 AM XDDDDDDDD 25-Nov-19 12:24 AM I'd love to have some more coax feedthroughs tho... 25-Nov-19 12:24 AM What can you fill a box, that the more you fill, the less the box weighs? Holes 25-Nov-19 12:25 AM the more holes you cut in a net the less holes it has 25-Nov-19 12:25 AM you should get into manufacturing your own 25-Nov-19 12:25 AM in theory, all they are is just very well degassed and good vacuum epoxy poured into this shape: 25-Nov-19 12:25 AM First he should clean the lathe from wood shavings. 25-Nov-19 12:25 AM I don't really want to start with glassblowing 25-Nov-19 12:25 AM shush @Nixie 25-Nov-19 12:26 AM shush the F*** 25-Nov-19 12:26 AM XDDDDD 25-Nov-19 12:26 AM :P 25-Nov-19 12:26 AM and I try to keep epoxy out of my chamber 25-Nov-19 12:27 AM https://i.spirit.re/pD8Xg.png 25-Nov-19 12:27 AM this is pretty much it 25-Nov-19 12:27 AM the filled in bits are epoxy 25-Nov-19 12:27 AM some special, magical epoxy 25-Nov-19 12:28 AM tho I could make something ot of my block of macor and the right solder / braze 25-Nov-19 12:28 AM I'd try going the epoxy route 25-Nov-19 12:28 AM if you can find something that will seal like certain kinds of MIL connectors(also a source of HV feedthroughs!), it's going to be relatively easy 25-Nov-19 12:28 AM all you have to do is... machine complicated internal slots... and superclean everything before applying perfectly degassed vacuum-mixed epoxy. 25-Nov-19 12:28 AM likely applied under vacuum too, with a little rod turning a small boat. 25-Nov-19 12:29 AM Adam always says that JB weld could be used for that. 25-Nov-19 12:29 AM it can! 25-Nov-19 12:29 AM but I'm thinking... super special magical epoxy that does not outgas or leak almost at all 25-Nov-19 12:30 AM you could always sputter glass or something on the other side of the epoxy, and fully seal it. 25-Nov-19 12:30 AM from what I know, Loctite Hysol EA 1C is one of the best UHV epoxies 25-Nov-19 12:31 AM But at that point seems more logical to try to do glass things. 25-Nov-19 12:31 AM the more expensive version of it is Torr Seal 25-Nov-19 12:31 AM but it's pretty much identical to 1C 25-Nov-19 12:31 AM (except like 5x the price) 25-Nov-19 12:33 AM I tried to find it, but was unable to. 25-Nov-19 12:33 AM (the hysol) 25-Nov-19 12:33 AM look for just "hysol 1C" 25-Nov-19 12:33 AM there's a bunch of them on ebay 25-Nov-19 12:33 AM though not every one of them is actually EA 1C 25-Nov-19 12:33 AM you want the one that looks like this 25-Nov-19 12:33 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/64-002002-6EC33.png 25-Nov-19 01:22 AM Noted! 25-Nov-19 01:22 AM Soon I'll be requiring to make 4 seals in a stainless piece. 25-Nov-19 01:33 AM what kind of seals? 25-Nov-19 01:33 AM feedthroughs, plug up misdrilled holes, etc? 25-Nov-19 01:35 AM No, the beam guide 25-Nov-19 01:35 AM for the vacuum electron gun 25-Nov-19 01:39 AM ahh, right 25-Nov-19 01:39 AM what voltages are we talking about? 25-Nov-19 02:49 AM @Conmega might want to grab a copy of this from libgen "Verilog and SystemVerilog Gotchas: 101 Common Coding Errors and How to Avoid Them" 25-Nov-19 02:49 AM Just came across it earlier and I've definitely been bit in weird weird ways in SystemVerilog 25-Nov-19 02:50 AM Well I am assuming for the whole bitfile generation for the mesa cards your basically taking modules and connecting them... its not really writing verilog/vhdl 25-Nov-19 02:50 AM Like stupid stuff that you'd expect the compiler to yell at you for before producing wacky output 25-Nov-19 02:51 AM though I have written a bit of verilog/vhdl in the past 25-Nov-19 02:51 AM Like int a; int b; a=1; b=1; vs int a = 1; int b=1: 25-Nov-19 02:51 AM They have behaved differently for me 25-Nov-19 02:51 AM That was in testbench tho 25-Nov-19 02:51 AM Not synthesizable RTL 25-Nov-19 02:52 AM Its all dependent on who's compiler your using. 25-Nov-19 02:52 AM VCS in that case 25-Nov-19 02:52 AM The one Intel uses for commercial, which ya kno, you'd think was relatively bug free 25-Nov-19 02:52 AM Since they been paying for how ever many decades 25-Nov-19 02:55 AM heh well at IBM we use something called nVHDL which is apparently IBM's own internal VHDL 25-Nov-19 02:55 AM so yea its just uh everyone does something different it seems 25-Nov-19 05:08 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/271976_GM-1148-ZB1-A_21.09.2016-BA9C0.pdf 25-Nov-19 05:08 AM got the second datasheet 25-Nov-19 05:08 AM looks like those aren't made to be welded in... 25-Nov-19 07:43 AM All this feedthrough talk reminds me of the fact that we had 600 pins going to a vacuum chamber with our own vacuum feedthroughs in my previous employer. Stycast (spelling?) apparently works quite well down to 10^-6 to 10^-7 mBar range. 25-Nov-19 07:49 AM Anything works well with enough pumping /s :P But seriously, cool! 25-Nov-19 07:54 AM what's stycast? 25-Nov-19 07:54 AM some epoxy? 25-Nov-19 07:59 AM https://www.ttelectronics.com/products/categories/resistors/resistors/ign-p2525/ 25-Nov-19 07:59 AM whistles 25-Nov-19 08:25 AM @GigaSquirrel Very runny castable vacuum grade epoxy 25-Nov-19 08:25 AM @Conmega It was pumped to vacuum and then left there :P 25-Nov-19 08:25 AM Sure the vacuum degrades, bout you needed to re-generate the vacuum maybe once a month at most, usually less often. 25-Nov-19 08:25 AM ah, nice 25-Nov-19 08:26 AM I was being sarcastic (/s) but very cool 25-Nov-19 08:26 AM The initial pumping and the one after that had the most outgassing anyway 25-Nov-19 08:26 AM yea 25-Nov-19 08:26 AM ohhh very perfect timing from china post 25-Nov-19 08:26 AM Did not even bake anything IIRC 25-Nov-19 08:26 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20191125_171814-FBD42.jpg 25-Nov-19 08:26 AM Nice 25-Nov-19 08:26 AM Our post is on strike 25-Nov-19 08:27 AM oh, "nice" 25-Nov-19 08:27 AM and if no resolution is found, they are going to be on strike until 22.12.2019 (yes, they specified the year) 25-Nov-19 08:27 AM So all my china packets are "somewhere" 25-Nov-19 08:27 AM not gotten any mail in like +2weeks now 25-Nov-19 08:27 AM And now there's support strikes from other indsutries 25-Nov-19 08:27 AM like transportation, marine shipping, public transport and so on 25-Nov-19 08:27 AM This is the result of the post attempting to force 25% to 50% paycuts to the majority of the work force 25-Nov-19 08:27 AM while the boss folks make 50k/month. 25-Nov-19 08:27 AM So, there's quite a bit of solidarity. 25-Nov-19 10:21 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20191125_190101-A8E30.jpg 25-Nov-19 10:25 AM Very nice 25-Nov-19 10:25 AM Awesome seeing you getting better and better with TIG welding. 25-Nov-19 10:26 AM thanks ^.^ 25-Nov-19 10:26 AM tho atm the table is doing most of the work 25-Nov-19 10:27 AM Those beads look pretty 25-Nov-19 10:35 AM did you weld on the inside edge too? 25-Nov-19 10:35 AM but yea that weld looks really nice 25-Nov-19 11:07 AM nope, those are made to be welded outside 25-Nov-19 11:07 AM but there is basically no chance for a virtual leak 25-Nov-19 11:07 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20191125_200117-2C683.jpg 25-Nov-19 11:07 AM the other ones also weld nicely, until you touch one of the pins with your tungsten 25-Nov-19 11:10 AM ah I guess they are just thin enough they melt through? 25-Nov-19 11:10 AM also oops 25-Nov-19 11:14 AM yep 25-Nov-19 11:14 AM and yep 25-Nov-19 11:14 AM good thing I have 69 more of those xD 25-Nov-19 11:21 AM jeezzz 25-Nov-19 11:21 AM I need to get another box from you when I get a welder... 25-Nov-19 11:21 AM Can't ya still use those, even if the inside pins are a tad fuxxored? 25-Nov-19 11:22 AM why use connections inside when you can tig your wires onto the pins! 25-Nov-19 11:33 AM A fun note 25-Nov-19 11:33 AM We've finally run out of IPv4 addresses. RIPE NCC just allocated the last /22. 25-Nov-19 11:33 AM “Dear colleagues, Today, at 15:35 UTC+1 on 25 November 2019, we made our final /22 IPv4 allocation from the last remaining addresses in our available pool. We have now run out of IPv4 addresses.” 25-Nov-19 11:43 AM Fun 26-Nov-19 09:41 AM We are reluming watch hands today, and just thinking about Radium.. We have NOS hands here, but there is actually an item on eBay for luke 100+ hands.. I wonder how you can extract Ra from them.. Something like homogenize thr lume lacquer off in an aprotic solvent, then centrifuge or something.. You'd think Ra would be the smallest point of the pellet.. At the same time, 1ug per hand, at best 26-Nov-19 09:41 AM Maybe 100 hands later.. But still, how to isolate? 26-Nov-19 12:03 PM @Noxz DO NOT TOUCH THE RADIUM 26-Nov-19 12:03 PM it's a horrible, nasty element 26-Nov-19 12:03 PM and in paint, it's in a very crappy suspension 26-Nov-19 12:03 PM if the watch hands have radium in them, you seal them in a plastic bag, seal that bag in a plastic bag, seal that bag in a plastic bag that you weld shut 26-Nov-19 12:03 PM then you call your friendly local fire department or hazmat disposal team, and toss them as far away as possible 26-Nov-19 12:03 PM radium smears everywhere, it gets everywhere, including you 26-Nov-19 12:03 PM you can never clean the radium paint off a watch hand, it's not worth it, period 26-Nov-19 12:03 PM the watch hands fall under high level nuclear waste, that's how bad they are 26-Nov-19 12:03 PM @GigaSquirrel can confirm 26-Nov-19 12:03 PM if you really want glowing watch hands, get some bare thin tritium vials, they come in the same dirty brownish green glow color if you really want it 26-Nov-19 12:13 PM absolutely 26-Nov-19 12:13 PM if I were to take on cleaning watch hands, I'd need an entire nuc hot box 26-Nov-19 12:13 PM and it's very hard to do radiochemistry with tiny amounts, so getting the radium out of the paint and then mixing it into new paint would be very hard 26-Nov-19 12:13 PM not to mention ridiculously stupid, because the moment it dries it starts decaying into dust, slowly 26-Nov-19 12:16 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20190420_124601-ABB59.jpg 26-Nov-19 12:17 PM looks like regular green daylight storing paint 26-Nov-19 12:17 PM unless that entire small blue container is contaminated 26-Nov-19 12:18 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20190420_124617-16E0E.jpg 26-Nov-19 12:18 PM 200k cpm iirc? 26-Nov-19 12:18 PM do I see an alpha spectra spicy rectangle? 26-Nov-19 12:18 PM aye 26-Nov-19 12:18 PM I have two! 26-Nov-19 12:18 PM modding them for high impedance is a pain 26-Nov-19 12:18 PM didn't bother 26-Nov-19 12:19 PM my bicron analyst needed it, otherwise the PSU pegged 26-Nov-19 12:19 PM works nicely on my ludlum 26-Nov-19 12:19 PM did you call the hazmat guys on this seller(?)? 26-Nov-19 12:19 PM nah 26-Nov-19 12:19 PM we tried to explain it to him 26-Nov-19 12:19 PM "I'vE BeEn DoInG tHiS fOr YeArS aNd Am JuSt FiNe" 26-Nov-19 12:20 PM well, it's a public hazard... people come, ruffle through the bits, get all glowy 26-Nov-19 12:20 PM if the seller is stupid, doesn't mean customers should get the brunt of radiation 26-Nov-19 12:22 PM you can't decon every stand at a flea market 26-Nov-19 12:22 PM but you can just wrap that entire stand into a barrel and slap a trefoil onto it 26-Nov-19 12:22 PM mean for doing that? probably 26-Nov-19 12:22 PM mean for giving the person the bill(which will happen)? definitely 26-Nov-19 12:22 PM but saves people from contamination 26-Nov-19 12:23 PM getting rid of those is 20k a barrel 26-Nov-19 12:23 PM he's paying for it 26-Nov-19 12:23 PM ¯\_(ツ)_/¯ 26-Nov-19 12:23 PM ignorance of the law is no excuse 26-Nov-19 12:23 PM especially if the law is common sense 26-Nov-19 12:25 PM shrug 26-Nov-19 12:25 PM people will try to kill themselves in any way possible 26-Nov-19 12:25 PM and that's o.k 26-Nov-19 12:25 PM just as long as they don't mass contaminate other people 26-Nov-19 12:25 PM let him eat the watch hands all he wants 26-Nov-19 12:29 PM yes, but pretty much every stand has radium watches 26-Nov-19 12:29 PM be the hero 26-Nov-19 12:29 PM hell no 26-Nov-19 12:29 PM "local man shuts down massive nuclear materials trading ring" 26-Nov-19 12:30 PM think of the consequences 26-Nov-19 12:30 PM "What, everyone still has radioactive stuff at home? I bet you can build bombs out of that! We need to force the governement to regulate this stuff more!" 26-Nov-19 12:30 PM there is some extreme radiophobia here 26-Nov-19 12:31 PM I feel sorry for the unknowing passerbys 26-Nov-19 12:32 PM The people willing to dig their hands in there are people already playing with the stuff at home. 26-Nov-19 12:32 PM unknowingly, perhaps 26-Nov-19 12:32 PM it seems ridiculous that there's no awareness of this despite the radiophobia 26-Nov-19 12:33 PM I'm quite happy about that 26-Nov-19 12:33 PM but think of the radium contaminating everything 26-Nov-19 12:33 PM I honestly do not care 26-Nov-19 12:34 PM as long as you get your ludlum to scream 26-Nov-19 12:34 PM I've done decon in labs, because there the people know what they are doing, what to watch out for etc 26-Nov-19 12:34 PM but I'm not trying to decon the real world 26-Nov-19 12:34 PM they're actively trying to contaminate the real world 26-Nov-19 12:34 PM feels really wrong 26-Nov-19 12:35 PM I'll safe someone from some mSv of incorporated Ra only for them to go to a bar and drink 5+ liters of beer 26-Nov-19 12:35 PM Sure they are actively crushing up the paint lacing advertisements and mailing them to everyone. 26-Nov-19 12:35 PM Yea really... 26-Nov-19 12:36 PM I can't prevent anyones stupidity, we've told the seller how dangerous the stuff is and if he doesn't care about that it is not my problem 26-Nov-19 12:36 PM did you tell the others that have the stalls with radium? 26-Nov-19 12:36 PM stalls? 26-Nov-19 12:36 PM stands 26-Nov-19 12:37 PM ah 26-Nov-19 12:37 PM tables with people attached to them 26-Nov-19 12:37 PM So mass hysteria is the solution to a few watch hands? 26-Nov-19 12:37 PM educating the sellers about it 26-Nov-19 12:37 PM if something looks like it could be contaminating or if we actually measure contamination we tell the seller and recommend putting it in a sealed container 26-Nov-19 12:37 PM the neighborhood rad watch 26-Nov-19 12:38 PM if something is very hot and sealed we buy it 26-Nov-19 12:38 PM oooooo, the police are coming for you now 26-Nov-19 12:39 PM oh noes 26-Nov-19 12:39 PM we get some nasty things on the flea market occasionally 26-Nov-19 12:40 PM I've heard there are some nice lipsticks on eastern european flea markets... 26-Nov-19 12:40 PM think 500uCi of Pu-239 mix 26-Nov-19 12:40 PM that's still on my list, I need one of those 26-Nov-19 12:40 PM lipsticks? 26-Nov-19 12:41 PM yeah what you said 26-Nov-19 12:41 PM good grief imagine shipping that as a lipstick 26-Nov-19 12:41 PM the sources are called lipstick due to their looks and function 26-Nov-19 12:41 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/rid3-BBAE0.png 26-Nov-19 12:42 PM yep 26-Nov-19 12:42 PM prepare to scream 26-Nov-19 12:42 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/eff8383ba5f1-08479.png 26-Nov-19 12:42 PM https://giphy.com/gifs/mrw-chick-racist-bAoCxF6jjFQje 26-Nov-19 12:43 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/images-B0C26.png 26-Nov-19 12:43 PM so many orphans after the war(s)... 26-Nov-19 12:43 PM these are way past wartime 26-Nov-19 12:43 PM 60ies to 90ies 26-Nov-19 12:44 PM so.... cold war? 26-Nov-19 12:44 PM fair point 26-Nov-19 12:46 PM I so want one of those lipsticks >.< 26-Nov-19 12:46 PM but I'm a bit too scared to import them 26-Nov-19 12:46 PM the bundes...everything will come after you for that 26-Nov-19 12:46 PM even closed, you can sniff them out with a scintillator from 10 meters away 26-Nov-19 12:46 PM they're stupidly hot 26-Nov-19 12:47 PM I know someone who got one into switzerland 26-Nov-19 12:47 PM but yeah 26-Nov-19 12:47 PM I'll just build connections until I find someone in germany with one of these 26-Nov-19 12:48 PM you might also want a black square with a dimple in it 26-Nov-19 12:48 PM already know someone with a KN6B :3 26-Nov-19 12:48 PM there's this thing 26-Nov-19 12:48 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/dp-2-163D7.png 26-Nov-19 12:48 PM DP-2 26-Nov-19 12:48 PM it's an ion chamber 26-Nov-19 12:48 PM inside is a Sr-90 check source 26-Nov-19 12:48 PM it's so hot that it's not removeable 26-Nov-19 12:49 PM that 6 GBq thingy? 26-Nov-19 12:49 PM I think so 26-Nov-19 12:49 PM yeah that's a bit too hot for me 26-Nov-19 12:49 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/istochnik-0C381.png 26-Nov-19 12:49 PM this little square of joy 26-Nov-19 12:49 PM plus I would not really know what to do with it, high beta activity is somewhat useless 26-Nov-19 12:49 PM High alpha activity tho... 26-Nov-19 12:50 PM I've heard that it causes instant, literally instant eye strain 26-Nov-19 12:50 PM I can imagine 26-Nov-19 12:50 PM if you haven't watched this guy, I recommend you do 26-Nov-19 12:50 PM https://www.youtube.com/watch?v=qPW0_NtUhcM 26-Nov-19 12:50 PM no actual subtitles, but his videos were very nice 26-Nov-19 12:50 PM until he was disappeared 26-Nov-19 12:51 PM already know him 26-Nov-19 12:51 PM well, his channel 26-Nov-19 12:51 PM jikes, was he? 26-Nov-19 12:51 PM all social media gone 26-Nov-19 12:51 PM there was some contact from him, but he's disappeared otherwise 26-Nov-19 12:52 PM :/ 26-Nov-19 12:53 PM I'm not surprised, he was amassing a very hot collection at home 26-Nov-19 12:56 PM oh and speaking of things I want 26-Nov-19 12:56 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20181021_162511-DDBD4.jpg 26-Nov-19 12:56 PM ha, they let you hold it 26-Nov-19 12:56 PM Hitler's pile? 26-Nov-19 12:57 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20181021_112330-5D231.jpg 26-Nov-19 12:57 PM Yep ^.^ 26-Nov-19 12:57 PM it feels so unreal 26-Nov-19 12:57 PM so very dense 26-Nov-19 12:57 PM I'm sure they have some spares in the basement 26-Nov-19 12:57 PM ;) 26-Nov-19 12:58 PM box go clicky 26-Nov-19 12:58 PM they actually wanted to let us hold one of the spares 26-Nov-19 12:58 PM "on no Idea where they are, they should be here... Anyway, just open up the box and while you're at it you can get the lamps working again" 26-Nov-19 12:58 PM uranium is weird, it turns a super dark black 26-Nov-19 12:58 PM but the other oxide colors are very nice 26-Nov-19 12:59 PM healthy mixture of oxides, hydroxides and radiolysis 26-Nov-19 01:00 PM should've brought a file 26-Nov-19 01:00 PM actually that wouldn't do anything 26-Nov-19 01:00 PM you'd just file your file 26-Nov-19 01:00 PM yep 26-Nov-19 01:00 PM should have taken the cube and ran 26-Nov-19 01:00 PM but I know someone who might have one of those... 26-Nov-19 01:01 PM didn't they make a huge surplus of these? 26-Nov-19 01:02 PM first time I'm hearing of that 26-Nov-19 01:02 PM I'm not sure 26-Nov-19 01:02 PM Wikipedia says 25 tons of this 26-Nov-19 01:03 PM yeah I think they made several reactorfuls of them 26-Nov-19 01:03 PM otherwise you'd be hard pressed to find spares 26-Nov-19 01:04 PM Really surprised they're just hanging there out in the open just out of arm's reach 26-Nov-19 01:04 PM nah those ones are fake 26-Nov-19 01:04 PM wouldn't be surprised if they were real 26-Nov-19 01:04 PM since uranium by itself, if not cooked for a while, isn't very hot 26-Nov-19 01:05 PM the real ones are "locked up" 26-Nov-19 01:05 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20181021_112443-5D1A7.jpg 26-Nov-19 01:05 PM original uranium waffles 26-Nov-19 01:07 PM Several of them has already made it out into the world 26-Nov-19 01:07 PM https://arstechnica.com/science/2019/06/physicists-hunt-uranium-cubes-to-shed-light-on-germanys-failed-nuclear-reactor/ 26-Nov-19 01:11 PM There are a bunch that were brought over to the USA that afaik nobody has any real record of what happened to them 26-Nov-19 01:11 PM general consensus is that they got processed through the atomic weapons program though...right? 26-Nov-19 01:12 PM that's what I've heard 26-Nov-19 01:12 PM Getting pure uranium in the us is easy 26-Nov-19 01:12 PM And surprisingly legal 26-Nov-19 01:12 PM DU or NU? 26-Nov-19 01:12 PM or HEU? 26-Nov-19 01:12 PM both 26-Nov-19 01:12 PM not that 26-Nov-19 01:12 PM I think you can own up to around 5 kilos of NORM or DU 26-Nov-19 01:12 PM without a license 26-Nov-19 01:12 PM here owning DU is a crime 26-Nov-19 01:12 PM anything above that is a crimier crime 26-Nov-19 01:14 PM well if you have to go to gulag anyways better make it worth it 26-Nov-19 01:14 PM there is a lot of weird stuff floating around in the USA but very little is really dangerous like you might find in former soviet states and other ares in europe 26-Nov-19 01:14 PM though for some reason its still not possible to buy DU penetrators... 26-Nov-19 01:14 PM allways wanted one but noone sells 26-Nov-19 01:14 PM thankfully you are rarely going to end up in jail for anything in the USA 26-Nov-19 01:14 PM just make your own @george 26-Nov-19 01:14 PM welllll about that.... 26-Nov-19 01:14 PM a chunk of DU 26-Nov-19 01:14 PM a lathe 26-Nov-19 01:14 PM a very good vacuum cleaner 26-Nov-19 01:15 PM no fun without making the du yourself 26-Nov-19 01:15 PM drive down a utah road with a shovel hanging out the window 26-Nov-19 01:15 PM there's tutorials online on processing ore into metal 26-Nov-19 01:15 PM cody's lab even did one 26-Nov-19 01:15 PM arent the penetrators illegal to sell just because of the general prohibition on armor piercing ammo? (minus the sporting use exceptions which dont exactly apply to DU) 26-Nov-19 01:15 PM im not going to post anything now for reasons of not wanting to get into trouble 26-Nov-19 01:15 PM but lets put it like this 26-Nov-19 01:15 PM i know the chemistry behind it 26-Nov-19 01:16 PM but if you're going to make the DU yourself... Not to place any ideas in anyones head, but it's not called "gun type" for nothing 26-Nov-19 01:16 PM you need enrichment to make it fissile 26-Nov-19 01:16 PM jup, getting the "D" is the difficult part here 26-Nov-19 01:16 PM snrk 26-Nov-19 01:16 PM that's the easy part 26-Nov-19 01:16 PM if you ask nicely 26-Nov-19 01:17 PM getting the HE part out is the difficult part 26-Nov-19 01:17 PM wich is the exact same as D 26-Nov-19 01:17 PM D is depleted 26-Nov-19 01:17 PM HE is highly enriched 26-Nov-19 01:17 PM duuuude 26-Nov-19 01:17 PM what he's saying is you can't make one without the other 26-Nov-19 01:17 PM suuuure buuuuuut 26-Nov-19 01:17 PM and if you make D you end up with H(E) 26-Nov-19 01:17 PM you can obtain DU a lot easier 26-Nov-19 01:17 PM shielding for one 26-Nov-19 01:18 PM i was talking about making 26-Nov-19 01:18 PM and breed it! 26-Nov-19 01:18 PM wow they used to have a bunch of DU on ebay but that seems to have all disappeared 26-Nov-19 01:18 PM guess they finally cracked down 26-Nov-19 01:18 PM and obtaining is just as difficult in germany aqs in russia 26-Nov-19 01:18 PM it's stupid easy to get here 26-Nov-19 01:18 PM find a gamma defectoscope 26-Nov-19 01:18 PM toss the cesium in the bin 26-Nov-19 01:18 PM xD 26-Nov-19 01:18 PM One of the pictures that was showed had a ~10 kg DU shield with like a 0.7 Ci Cs-137 source in it. 26-Nov-19 01:18 PM boom, 50-100kg or so of DU 26-Nov-19 01:18 PM https://giphy.com/gifs/phone-app-facing-JoePLWxLD7cGc 26-Nov-19 01:19 PM or alternatively sell it to some shady guy and finance ur lab for the few days of freedom you still have 26-Nov-19 01:19 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/ecc43978b183-3439D.png 26-Nov-19 01:19 PM this is about 500kg of DU 26-Nov-19 01:19 PM and a couple dozen grams of Cs-137 IIRC 26-Nov-19 01:20 PM Are these BGI series units that common over there? 26-Nov-19 01:20 PM no, but the smaller ones can be sometimes found in scrapyards 26-Nov-19 01:20 PM the smaller BGI units do pop up once in a while 26-Nov-19 01:20 PM at least in Russia 26-Nov-19 01:21 PM but sometimes is still very very very rare 26-Nov-19 01:21 PM you'd be nuts to touch one at all though 26-Nov-19 01:21 PM Isn't that very illegal? 26-Nov-19 01:21 PM yes and plain stupid 26-Nov-19 01:21 PM just a little very 26-Nov-19 01:21 PM even when closed they emit around 5-10mSv/hr on the surface 26-Nov-19 01:21 PM 100-1000x that when open 26-Nov-19 01:21 PM thats the sort of thing that would probably result in jailtime even in the USA 26-Nov-19 01:22 PM definitely 26-Nov-19 01:22 PM Yeah most definitely 26-Nov-19 01:22 PM you would get life for terrorism even if they dont expect you to do anything with it 26-Nov-19 01:22 PM each of these things contains enough material to make a big district or small town uninhabitable 26-Nov-19 01:22 PM but they're seeing less and less use now, since high energy x-ray sources are becoming more "affordable" 26-Nov-19 01:22 PM you can easily buy a 320keV bipolar source 26-Nov-19 01:24 PM i love how the kid/guy who created probably the largest noncommercial civilian nuclear incident in the USA only ended up going to jail 10yrs later because he was stealing smoke alarms 26-Nov-19 01:24 PM nah 26-Nov-19 01:24 PM he was just an idiot 26-Nov-19 01:24 PM he contaminated his entire property, and the neighbors' 26-Nov-19 01:24 PM Pfuscher. 26-Nov-19 01:24 PM xD 26-Nov-19 01:24 PM there was also that Swedish guy 26-Nov-19 01:24 PM or Swiss? 26-Nov-19 01:24 PM did the same thing but failed harder and at a smaller scale 26-Nov-19 01:25 PM don't know him, which is probably a good sign 26-Nov-19 01:25 PM breeder reactors aren't even fun to build 26-Nov-19 01:25 PM you just put thing A next to thing B and it works 26-Nov-19 01:25 PM but that is the fun thing 26-Nov-19 01:26 PM a fusor is cooler 26-Nov-19 01:26 PM you dial a knob and then things happen and you get danger particles 26-Nov-19 01:26 PM but also waaaay lower activity 26-Nov-19 01:26 PM but its not enough material 26-Nov-19 01:26 PM a good fusor could easily breed things 26-Nov-19 01:26 PM stuff doesnt exist unless you can see it 26-Nov-19 01:27 PM you're not going to get a powerful neutron source out of alphaBe anyway 26-Nov-19 01:27 PM not unless you go extreme 26-Nov-19 01:27 PM thats whyhe was an idiot 26-Nov-19 01:27 PM (like sticking the bare lipstick ceramic ring in a turned beryllium sleeve) 26-Nov-19 01:27 PM go big or go home 26-Nov-19 01:27 PM oh that's nothing 26-Nov-19 01:27 PM the pu lipsticks are not thaaaat hot 26-Nov-19 01:27 PM a 3.7 GBq AmBe is also just e5 n/s 26-Nov-19 01:27 PM half a mCi 26-Nov-19 01:27 PM so not bad 26-Nov-19 01:28 PM but e5 is an average fusor 26-Nov-19 01:28 PM @Deleted User you would really NOT want to turn beryllium if you ever planned to use that lathe for anything in the future 26-Nov-19 01:28 PM better to just get it sintered from powder 26-Nov-19 01:28 PM well, I can't see how you could get a safe and hotter source @GigaSquirrel 26-Nov-19 01:28 PM @LRM it's not that bad 26-Nov-19 01:28 PM you just have to have good evacuation and cleaning 26-Nov-19 01:28 PM sleeving 26-Nov-19 01:29 PM noone was talking about safe or legal here ^^ 26-Nov-19 01:29 PM doing it on a bare lathe would be beyond stupid 26-Nov-19 01:29 PM the leal limits is below fusor 26-Nov-19 01:29 PM below pretty much anything of interest 26-Nov-19 01:29 PM but the fusor you can turn off and say "what neutrons? it's just a vacuum!" 26-Nov-19 01:29 PM :P 26-Nov-19 01:29 PM thats the nice part ^^ 26-Nov-19 01:29 PM I wouldnt want beryllium anything anywhere near any machine tools personally...even thinking about it makes me uncomfortable 26-Nov-19 01:30 PM hotter sources are easy to get 26-Nov-19 01:30 PM as long as you don't cause massive chatter 26-Nov-19 01:30 PM if you're talking dose rate, not activity 26-Nov-19 01:30 PM just shape it differently 26-Nov-19 01:30 PM I think we're talking about neutrons here, anything above 10e6 is hard 26-Nov-19 01:30 PM you can machine beryllium under flood coolant 26-Nov-19 01:30 PM get sheet, cut it, glue a ring, done 26-Nov-19 01:30 PM or drawing it if you are into toolmaking 26-Nov-19 01:30 PM friend of mine runs a lot of beryllium copper at work. they have a whole cleanroom setup for it and make him get in a bunny suit for it...and thats with it alloyed to something way less nasty 26-Nov-19 01:31 PM beryllium copper is meh 26-Nov-19 01:31 PM but I'd easily machine beryllium under full flood 26-Nov-19 01:31 PM probably oil flood 26-Nov-19 01:31 PM downside: you can't see what you're doing :D 26-Nov-19 01:31 PM but as long as you bind all the dust and shove it into a filter or just a bucket, you're fine 26-Nov-19 01:31 PM from what i understand it is mainly a legal requirements thing and not actual safety for the cleanroom/suits 26-Nov-19 01:31 PM considering that in some places in recycling every once in a while some argon laser is shredded and noone notices... 26-Nov-19 01:31 PM and don't let it get anywhere but the tool and chuck(again, condom) 26-Nov-19 01:31 PM when beryllium is wet with anything, it's pretty much inert 26-Nov-19 01:31 PM but then it dries out and that's when you get fluffy lungs. 26-Nov-19 01:32 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/photo_2019-09-12_13-41-46-2D459.jpg 26-Nov-19 01:32 PM the breaker on the bottom right was actually the only thing in russia i could find with a simple pancake 26-Nov-19 01:32 PM not even elevated backround anywhere else 26-Nov-19 01:33 PM if you're ever in Belarus, I can easily find you a DP-5B for <$100 26-Nov-19 01:33 PM with the pill 26-Nov-19 01:33 PM same in Russia 26-Nov-19 01:33 PM in Ukraine it's even fully legal 26-Nov-19 01:34 PM but you can find them in german flea markets as well 26-Nov-19 01:34 PM ...a friend told me 26-Nov-19 01:34 PM or you visit ham radio meetups in germany 26-Nov-19 01:34 PM I don't know if you can find the full kit ones though 26-Nov-19 01:34 PM with the pill still on the case 26-Nov-19 01:34 PM xD 26-Nov-19 01:34 PM welllll 26-Nov-19 01:34 PM cough cough 26-Nov-19 01:34 PM dry air in here 26-Nov-19 01:35 PM oh, thats just beryllium 26-Nov-19 01:36 PM the condition of the pills is also very worrying 26-Nov-19 01:36 PM gnah, i cant find the shop anymore 26-Nov-19 01:36 PM a lot of them have the foil peeling off 26-Nov-19 01:36 PM exposing the brittle epoxy 26-Nov-19 01:36 PM there is epoxy under the foil? 26-Nov-19 01:36 PM i expected it to be bare Sr mir 26-Nov-19 01:36 PM *mix 26-Nov-19 01:36 PM yes, there's a top layer of bonded foil 26-Nov-19 01:37 PM Oh man, I wish I wasn't on my phone so I could actually write more.. Will have to wait until I get out of school 26-Nov-19 01:37 PM under it there's a brownish epoxy, which is a Sr-Y suspension mix 26-Nov-19 01:37 PM oh cool 26-Nov-19 01:37 PM it's dispersed within the actual epoxy and it's very brittle 26-Nov-19 01:37 PM very nice to know this 26-Nov-19 01:37 PM the epoxy is inside the little dimple 26-Nov-19 01:37 PM the rest of the pill is just metal 26-Nov-19 01:38 PM http://www.solidery.eu/en/17-geigerzahler 26-Nov-19 01:38 PM this shop is a really wired place and i once considered ordering there 26-Nov-19 01:39 PM a DP-63... huh 26-Nov-19 01:39 PM but i dont like the risk of the autorities some day noticing and my address beeing in their system 26-Nov-19 01:39 PM I hope that's not the DP-63 with the yellower scale 26-Nov-19 01:39 PM they are definetly still hot 26-Nov-19 01:39 PM that thing is COVERED with radium 26-Nov-19 01:39 PM i know 26-Nov-19 01:39 PM and im pretty sure they dont 26-Nov-19 01:40 PM looks like that DP-5V is carefully photographed to not show the source spot :P 26-Nov-19 01:40 PM nice thing about the dp5 is that the source is epoxied in place 26-Nov-19 01:40 PM it's not 26-Nov-19 01:40 PM it's riveted 26-Nov-19 01:40 PM so if the sleeve is still in place the source will be too 26-Nov-19 01:40 PM nope, it's often removed 26-Nov-19 01:40 PM rivited and epoxied 26-Nov-19 01:40 PM nope 26-Nov-19 01:40 PM well 26-Nov-19 01:40 PM there's a thin rivet you can easily drill out 26-Nov-19 01:40 PM the source just falls off 26-Nov-19 01:41 PM i dont want to use more clear words, but i do know it is epoxied at least in one 26-Nov-19 01:41 PM could be a reseller hack 26-Nov-19 01:41 PM in the original design and how they were made, it's a rivet on one side, and a spinny rivet with a lead piece on the other 26-Nov-19 01:42 PM epoxy discoloured by accumulated dose 26-Nov-19 01:43 PM https://i.spirit.re/J6Sjf.png 26-Nov-19 01:43 PM nonono 26-Nov-19 01:43 PM then you flip it away 26-Nov-19 01:43 PM https://i.spirit.re/7LaQ8.png 26-Nov-19 01:43 PM around the probe there is a sleeve 26-Nov-19 01:43 PM that's a different DP 26-Nov-19 01:43 PM yeah 26-Nov-19 01:43 PM the 5V had either or 26-Nov-19 01:43 PM very hard to remove from the sleeve if it's in there 26-Nov-19 01:43 PM almost impossible to do so without damaging the integrity of the seal 26-Nov-19 01:44 PM thats what i was talking about ^^ 26-Nov-19 01:44 PM https://i.spirit.re/33qnD.png 26-Nov-19 01:44 PM yeah this 26-Nov-19 01:44 PM exactly 26-Nov-19 01:44 PM and the bulk epoxy is very brittle 26-Nov-19 01:44 PM the best way to remove it is to just cut out the entire bump 26-Nov-19 01:45 PM ooor to file off the rivet and slightly hit the back of the bump with a punch 26-Nov-19 01:45 PM it will pop right out 26-Nov-19 01:45 PM and pray it doesn't shatter 26-Nov-19 01:45 PM it wont 26-Nov-19 01:45 PM speaking of which, I may or may not need to make a nice housing shield for a pill I may or may not own 26-Nov-19 01:45 PM it also wont stick to the source itself 26-Nov-19 01:45 PM now that I have a lathe 26-Nov-19 01:46 PM i may dabble in housing making myself soon 26-Nov-19 01:46 PM after completing one for a different source i dont own 26-Nov-19 01:47 PM I might or might not have it just because I might or might not have a DP-5B 26-Nov-19 01:47 PM you better not own that source, that would be illegal! 26-Nov-19 01:47 PM as a collection piece 26-Nov-19 01:47 PM it's still sitting unused in the original wooden case 26-Nov-19 01:47 PM ready for when the apocalypse strikes 26-Nov-19 01:48 PM well, its only incase you find one on the street one day and remove it in selfless sacrifice to protect your fellow citizens 26-Nov-19 01:48 PM it's a very very blind meter 26-Nov-19 01:48 PM the entire series is 26-Nov-19 01:48 PM but it's unkillable and survives high dose rates 26-Nov-19 01:48 PM the scale speaks for it self 26-Nov-19 01:48 PM also the voltage stabilizers inside of the probe are mezmerizing 26-Nov-19 01:49 PM ah yeah, they're valves 26-Nov-19 01:49 PM it's a weird mix of tubes and transistors 26-Nov-19 01:49 PM neon filled blinging with every event 26-Nov-19 01:50 PM I made a little clicky plug-in speaker for it 26-Nov-19 01:50 PM and then never touched it again 26-Nov-19 01:51 PM i keep it just as a decorative one 26-Nov-19 01:51 PM i have so many military ones i dont really need another one... 26-Nov-19 01:51 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/kr-F6C01.jpg 26-Nov-19 01:52 PM swagelok? 26-Nov-19 01:52 PM tahts my approach in making housings for non existant sources 26-Nov-19 01:52 PM no, just M12x1 pneumatic hardware 26-Nov-19 01:52 PM you have my attention 26-Nov-19 01:52 PM swage is to bulks 26-Nov-19 01:52 PM *bulky 26-Nov-19 01:52 PM how do you get nonexistant kr-85? 26-Nov-19 01:53 PM by not buying it on ebay 26-Nov-19 01:53 PM you may look towards lipstick equivilant objects made in the former GDR 26-Nov-19 01:53 PM roughly in the 1980s 26-Nov-19 01:53 PM must be super stale 26-Nov-19 01:53 PM given it's got a half life of 11ish years 26-Nov-19 01:54 PM they had enough spice to begin with 26-Nov-19 01:54 PM oh no there would be more than enough activity left 26-Nov-19 01:54 PM what's the original source? 26-Nov-19 01:54 PM or are they just... kr-85 vials? 26-Nov-19 01:54 PM looks like a lightbulb 26-Nov-19 01:54 PM 5mm dia 26-Nov-19 01:54 PM 150ul 26-Nov-19 01:54 PM at 1 atm 26-Nov-19 01:55 PM I'm completely lost 26-Nov-19 01:55 PM now its math time for you ^^ 26-Nov-19 01:56 PM well, I'm not really interested in acquiring sources 26-Nov-19 01:56 PM I have enough to check and calibrate my spectrometer projects and meters 26-Nov-19 01:56 PM and that's it 26-Nov-19 01:56 PM jup 26-Nov-19 01:56 PM at some point you will sit there packaging all your thorium, uranium ore and other cacergenerators and ask yourself how this crap got out of hand and how your relatives and family will have to deal with it some day when you have somehow killed yourself 26-Nov-19 01:58 PM I prefer to keep my thorium sintered 26-Nov-19 01:58 PM that way it's even legal!!! 26-Nov-19 01:58 PM that was the point in my career when i started nicely labelling all the dangerous crap 26-Nov-19 01:58 PM I want a long lasting label printer 26-Nov-19 01:58 PM but they're either mindlessly expensive or don't exist 26-Nov-19 01:58 PM thats why i went with etching 26-Nov-19 01:58 PM or use punsh dies 26-Nov-19 01:59 PM I want something more universal 26-Nov-19 01:59 PM well yes, if its about general use im still on the look for something as well... 26-Nov-19 01:59 PM I have an idea but you won't like the price 26-Nov-19 01:59 PM portable pulsed laser engraver 26-Nov-19 02:00 PM it's doable and can be very compact 26-Nov-19 02:00 PM i wanted soemthing similar for a long time now 26-Nov-19 02:00 PM a 5x5cm CNC with a bldc engraving motor and a gantry opened to the bottom 26-Nov-19 02:00 PM you could clamp it to stuff 26-Nov-19 02:00 PM you're thinking of a ball peen CNC engraver 26-Nov-19 02:00 PM and let it mill anything under it 26-Nov-19 02:01 PM they're a thing and they're made for manufacturing lines 26-Nov-19 02:01 PM yes, thats prettymuch the same idea 26-Nov-19 02:01 PM for soft material maybe even some old needle printhead would work 26-Nov-19 02:02 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/50524-10015198-2F4E8.png 26-Nov-19 02:02 PM pretty sure it would leave marks on aluminium 26-Nov-19 02:02 PM jup, i know them from marking data onto big industrial engineblocks 26-Nov-19 02:02 PM could always go to Standa for a laser 26-Nov-19 02:02 PM http://www.standa.lt/products/catalog/lasers_laser_accessories?item=630&prod=Q-switched-Nd-YAG-micro-laser 26-Nov-19 02:02 PM but the moment you mention Standa, your wallet starts smoking 26-Nov-19 02:03 PM just have to sell kindeys of roughly two dozend people i guess... 26-Nov-19 02:03 PM https://www.rpmclasers.com/product/fp3-1064-20-10-1064nm-microchip-laser/ 26-Nov-19 02:03 PM they come even smaller! 26-Nov-19 02:03 PM 1.3ns, 200mW 26-Nov-19 02:03 PM that oughta mark things? 26-Nov-19 02:05 PM at 1.3ns i guess... 26-Nov-19 02:05 PM could also go the brute force way 26-Nov-19 02:05 PM https://www.ebay.com/itm/JOLD-x-CPXF-1L-JENOPTIK-20-Watts-cw-808nm-Laserdiode-laser/261544886157 26-Nov-19 02:05 PM 20W Jenoptik EyeBlaster 26-Nov-19 02:05 PM burn your material 26-Nov-19 02:06 PM but i doubt it will be nice on metal 26-Nov-19 02:06 PM yep 26-Nov-19 02:06 PM would have to be very very nciely focussed 26-Nov-19 02:06 PM i have 32W 445nm and its enough to make a razorblade glow but it wont mark it otherwise 26-Nov-19 02:07 PM I really want a pulsed fiber laser to make PCBs and do micromachining 26-Nov-19 02:07 PM but they are just not affordable at all 26-Nov-19 02:08 PM i had a ruby but the tube died 26-Nov-19 02:08 PM I need a Q-switched fiber pumped one 26-Nov-19 02:08 PM at least 10kHz 26-Nov-19 02:08 PM yes 26-Nov-19 02:08 PM thats what i wanted o add 26-Nov-19 02:08 PM it wont work without 26-Nov-19 02:08 PM https://www.ebay.com/itm/SPI-SP-20P-0008-002-20W-Fiber-Laser-Used/401844732724 26-Nov-19 02:08 PM there's this guy 26-Nov-19 02:08 PM 0 feedback seller, ridiculous shipping price, unknown condition 26-Nov-19 02:09 PM https://www.youtube.com/watch?v=0PxIeHAbqA4 26-Nov-19 02:09 PM mhm 26-Nov-19 02:09 PM that's the one 26-Nov-19 02:10 PM what i really dont like about the ebay one is that screws are missing 26-Nov-19 02:11 PM https://www.ebay.com/itm/MAX-Q-switched-Pulse-Fiber-Laser-Source-GQM-1064nm-for-Laser-Marking-Machine/303362356329 26-Nov-19 02:11 PM could always buy a brand new one 26-Nov-19 02:11 PM blatant IPG ripoffs, down to the housing 26-Nov-19 02:11 PM Raycus especially 26-Nov-19 02:11 PM https://www.ebay.com/itm/Raycus-Laser-Source-20W-50W-Q-switched-Pulse-Fiber-Laser-1064nm-for-Fiber-Laser/323978526503 26-Nov-19 02:11 PM https://www.youtube.com/watch?v=SiqIN1N-NEc 26-Nov-19 02:11 PM what a sound 26-Nov-19 02:12 PM yep 26-Nov-19 02:12 PM I know that guy 26-Nov-19 02:12 PM we've talked a bit, he looks insane but isn't 26-Nov-19 02:12 PM (also got raided) 26-Nov-19 02:12 PM this thing makes your soul run away before your body can 26-Nov-19 02:12 PM oh cool 26-Nov-19 02:12 PM the eberline ESP series probably has the best sounding clicker 26-Nov-19 02:12 PM lol he has my channel in his recommended channels 26-Nov-19 02:12 PM https://i.spirit.re/lJacF.png 26-Nov-19 02:13 PM also yes, that chinese laser looks cool didnt expect this sort of pricing even from them 26-Nov-19 02:13 PM why the raid tho? 26-Nov-19 02:14 PM they're the ones that go into the "cheap" markers you can find as a full kit 26-Nov-19 02:14 PM he had a mini-chernobyl on his balcony 26-Nov-19 02:14 PM (see his own video titled exactly that) 26-Nov-19 02:15 PM Directly from China, <$500 USD 26-Nov-19 02:15 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/O1CN016zRscI1qIDoF2Jl2X_2635945472-664BE.png 26-Nov-19 02:15 PM <$5000 26-Nov-19 02:15 PM not 500 26-Nov-19 02:15 PM unless there's no source 26-Nov-19 02:16 PM and no housing as supposed to be 26-Nov-19 02:16 PM even with no source that would e a good price 26-Nov-19 02:16 PM the galvos are still expensive 26-Nov-19 02:16 PM not $500 expensive though 26-Nov-19 02:16 PM Sorry, it's $1300 with source I think 26-Nov-19 02:17 PM also, oooo 26-Nov-19 02:17 PM https://www.ebay.com/itm/SEI-LASER-MARKING-MACHINE/163783594238 26-Nov-19 02:17 PM jenoptik lens 26-Nov-19 02:17 PM but I don't see a source 26-Nov-19 02:17 PM could be inside 26-Nov-19 02:17 PM do you have a link to his balkony video? i cant find it with my miserable kyrillic skills 26-Nov-19 02:17 PM hehe, wavelegth in microns xD 26-Nov-19 02:18 PM https://www.youtube.com/watch?v=EmNdiR8p6Dg 26-Nov-19 02:18 PM that was before the raid 26-Nov-19 02:18 PM then he got a friendly request to "can you don't" and now he has none of the sources 26-Nov-19 02:18 PM allegedly 26-Nov-19 02:20 PM darn i would like to talk to you uncontrained now xD 26-Nov-19 02:20 PM hey, I don't do any of this :P 26-Nov-19 02:20 PM wellll 26-Nov-19 02:20 PM I very much enjoy being not in jail 26-Nov-19 02:20 PM me too 26-Nov-19 02:20 PM i wouldnt go to jail here i guess but i would still get enough trouble and some hefty bills 26-Nov-19 02:21 PM now this 26-Nov-19 02:21 PM https://www.ebay.com/itm/NIB-nlight-PFL400-1064NM-Pulsed-Fiber-Laser-generator-1064nm/323511041379 26-Nov-19 02:21 PM this is pure hnnnng 26-Nov-19 02:21 PM a very powerful pulsed MOPA laser 26-Nov-19 02:21 PM this thing will shred through anything you point it at 26-Nov-19 02:22 PM do want 26-Nov-19 02:22 PM i wonder if customs would allow it 26-Nov-19 02:23 PM absolutely 26-Nov-19 02:23 PM it's safe 26-Nov-19 02:23 PM and most definitely not a laser pointer 26-Nov-19 02:23 PM yes 26-Nov-19 02:23 PM but they are very very edgy on anything laser these days 26-Nov-19 02:23 PM only pointers are illegal but tey are buerocrats 26-Nov-19 02:23 PM I think this is my dream laser for PCB work 26-Nov-19 02:23 PM https://www.ebay.com/itm/UV-laser-marking-system-FOBA-V-0020-UV-W-355-nm-wavelength/323904000233 26-Nov-19 02:23 PM All this talk about berylliym makes me think about all the RF crap that I have with BeO, and all those soviet tubes I have with BeO as the ceramic of choice. 26-Nov-19 02:23 PM UV is PERFECT for copper ablation 26-Nov-19 02:25 PM 0.1mJ @ 2W 26-Nov-19 02:25 PM someone offered me some uv laser basically for free pickup but im not sure if its realistic 26-Nov-19 02:25 PM is it pulsed? 26-Nov-19 02:25 PM the guy allways offers stuff but never deliveres 26-Nov-19 02:25 PM actually im nnot sure anymore, it was some time ago 26-Nov-19 02:26 PM I really want a pulsed fiber laser for PCB work 26-Nov-19 02:26 PM but not at eBay prices 26-Nov-19 02:26 PM i guess today fiber is the way to go 26-Nov-19 02:26 PM no other way to do it for PCBs, you need many kHz repetition rates and very high pulse energies for ablation 26-Nov-19 02:27 PM i have some good old 3W argons that tought me how bad olt tech is in laserhardware 26-Nov-19 02:27 PM argon ion lasers are nice for spectral work 26-Nov-19 02:27 PM just... not, for everything else, at all 26-Nov-19 02:27 PM jup 26-Nov-19 02:27 PM but they were my first propper lasers when i was 15 or so, so i still like them a lot ^^ 26-Nov-19 02:27 PM just look beautiful and you can heat your house 26-Nov-19 02:28 PM my nicest laser is a 26mW meter-long HeNe 26-Nov-19 02:28 PM it even works 26-Nov-19 02:30 PM i found one in that size with a broken tube 26-Nov-19 02:30 PM very sad, it definetly got there first and then was trashed by someone dropping other oobsolete stuff on it 26-Nov-19 03:26 PM ooo, i need to get my HeNe tube working 26-Nov-19 03:26 PM it's just a little 2mw-ish thing, probably from a barcode scanner, but i've never gotten to play with a 'real' gas laser before 26-Nov-19 07:27 PM I just got a quote of $700 for one of these 20W Chinese Raycus fiber lasers 26-Nov-19 07:27 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/TB25M-17C3B.png 26-Nov-19 07:27 PM Tempting, with $58 shipping! 26-Nov-19 07:28 PM $700 for what power? 26-Nov-19 07:28 PM oh, 20W, I'm blind 26-Nov-19 07:28 PM that's a great deal 26-Nov-19 07:28 PM is that brand new factory price, or just a one-off? 26-Nov-19 07:28 PM Brand new 26-Nov-19 07:28 PM ... does this mean they have more 26-Nov-19 07:28 PM They've got lots of these 26-Nov-19 07:29 PM ooh... 26-Nov-19 07:29 PM are they a reseller, or just excess stock? 26-Nov-19 07:29 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/O1CN011hjOhkgR6S72P5r_3497474313-CA84D.png 26-Nov-19 07:29 PM Reseller 26-Nov-19 07:29 PM so they can get me as many of them as I want at $758 a piece? 26-Nov-19 07:29 PM $1000 for 30W 26-Nov-19 07:29 PM I don't know about shipping to Belarus, but it would be around the same I think 26-Nov-19 07:30 PM Please do share the contact 26-Nov-19 07:30 PM I'm taking advantage of the shipping loophole through Hong Kong 26-Nov-19 07:30 PM The guy only speaks Chinese though 26-Nov-19 07:30 PM oh, whoops 26-Nov-19 07:30 PM Nevertheless I must immediately bug my friend who just happens to be a full-cycle laser cutter manufacturer just a few minutes away from me 26-Nov-19 07:30 PM We've talked about adding low cost engravers to his portfolio 26-Nov-19 07:32 PM They've got other brands too. This 15W fiber laser is $600 26-Nov-19 07:32 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/O1CN01xgOCmm1hjOi2ccBx5_3497474313-66F07.png 26-Nov-19 07:32 PM But somehow a lot heavier, so shipping is a bit more. I am now asking for a quote for some galvanometers too 26-Nov-19 07:33 PM 15W is pushing the bottom end of things 26-Nov-19 07:33 PM 20 is where I'd stop 26-Nov-19 07:33 PM I wonder if they have cheaper high power pulsed lasers, the more off-brand kind 26-Nov-19 07:38 PM Manual 26-Nov-19 07:38 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/RFL-P20QB_30QB_pulsed_fiber_laser_Users_Gu-31160.pdf 26-Nov-19 07:38 PM Raycus and Maxphotonics are sort of the "brand names" 26-Nov-19 07:38 PM Of China anyway, which are total ripoffs of IPG units inside 26-Nov-19 07:38 PM Yeah, but I'd stick with "brand names" when it comes to Chinesium 26-Nov-19 07:38 PM Hell, Raycus is literally identical physically 26-Nov-19 07:38 PM even to the fiber sheath thickness and relief 26-Nov-19 07:38 PM Off brand are just ripoffs of ripoffs 26-Nov-19 07:39 PM As long as there's pulses... 26-Nov-19 07:39 PM My budget is not very large and I want the best bang for the buck 26-Nov-19 07:40 PM I'll keep looking, especially on the second-hand market 26-Nov-19 07:40 PM IPG and SPI are the brands to look out for 26-Nov-19 07:40 PM SPI is red and thin, IPG is gray and thick 26-Nov-19 08:53 PM Any UV? 26-Nov-19 09:03 PM All of these relatively cheap fiber lasers are ytterbium-doped giving 1045nm wavelength 26-Nov-19 09:03 PM There are UV laser diodes though 26-Nov-19 10:01 PM You won't find a pulsed UV laser new for under $10k 26-Nov-19 10:01 PM That's for the cheapest lab sources 26-Nov-19 10:01 PM If you want something that can do copper or other serious serious micromachining, you're looking at north of 30k 26-Nov-19 10:10 PM here's one if you really want it 26-Nov-19 10:10 PM https://www.ebay.com/itm/COHERENT-AVIA-266-3-266nm-Solid-State-Q-Switched-UV-Laser/173038852747? 26-Nov-19 10:10 PM or a beefier unit 26-Nov-19 10:10 PM https://www.ebay.com/itm/Coherent-Avia-355X-High-Power-Q-Switched-UV-Laser-355nm/153297303219 26-Nov-19 11:29 PM feeling beefy today 27-Nov-19 01:17 AM How would that fiber laser used in a cutter? 27-Nov-19 01:18 AM It wouldn't, they're pulsed lasers. 27-Nov-19 01:18 AM Otherwise, collimated(focused), directed by two galvanometers with mirrors on them, through an f-theta lens, onto a surface. 27-Nov-19 01:18 AM Look up "fiber laser marking" on youtube for an example 27-Nov-19 01:18 AM https://www.youtube.com/watch?v=c5Hr8qkZjhc 27-Nov-19 05:28 AM Whee, i bought a MFC from eBay 27-Nov-19 05:28 AM Also picked up a +-15V power converter module for it 27-Nov-19 05:28 AM I think I'll try hooking my MKS gauge to the vacuum chamber I'll build from a bell jar base and a piece of PVC pipe, with a blocking plate on top (just resting with some silicone). See if i can pulse the MFC and see the gauge spike. 27-Nov-19 05:28 AM Need to work out delivering partial pressure of gas, rather than volumetric flows 27-Nov-19 10:41 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20191127_193903-D21EF.jpg 27-Nov-19 10:41 AM oooOOOOHHHhhhhh 27-Nov-19 10:41 AM time for some proportional detectors ❤️ 27-Nov-19 11:24 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/unknown-7E3FA.png 27-Nov-19 11:24 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/unknown-02DD6.png 27-Nov-19 11:25 AM Gigasquirrel-Muller tube 27-Nov-19 11:25 AM why spend lots on a feedthrough when you can just do it like this 27-Nov-19 12:17 PM since we were recently talking about Ra 27-Nov-19 12:17 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/EKYbd5dWkAAGsdz-316B6.png 27-Nov-19 12:21 PM Let me fix this 27-Nov-19 12:21 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/unknown-379DD.png 27-Nov-19 12:33 PM hmmm 27-Nov-19 12:33 PM now that I have a proper anode wire 27-Nov-19 12:33 PM I still have those straws from cern 27-Nov-19 12:34 PM what are they? 27-Nov-19 12:35 PM basically just a carbon fiber tube 27-Nov-19 12:35 PM cathodes of proportional detectors, used for <10 keV photon spectrometry 27-Nov-19 12:35 PM I seeeeee 27-Nov-19 12:36 PM I think they quoted like 5% FWHM for the iron somethingrather line? 27-Nov-19 12:36 PM Fe-55 27-Nov-19 12:36 PM right 27-Nov-19 12:36 PM 5% is a lot for x-ray stuff 27-Nov-19 12:36 PM they're used as transition radiation detectors to discriminate between electrons and pions 27-Nov-19 12:36 PM SDDs have less than 0.1% FWHM 27-Nov-19 12:37 PM yeah but SDDs also stop a lot of particles that aren't photons 27-Nov-19 12:37 PM and you can't put millions of SDDs in there, at least not for that price 27-Nov-19 12:37 PM heh 27-Nov-19 12:37 PM SDD array on a chip 27-Nov-19 12:38 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/trt-12-CAAFE.png 27-Nov-19 12:38 PM that over the whole length of the atlas detector 27-Nov-19 12:38 PM oh 27-Nov-19 12:38 PM oh and this is only the innermost ring 27-Nov-19 12:38 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/trt-13-A9376.png 27-Nov-19 12:38 PM interesting 27-Nov-19 12:39 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/innerdetector-13FA5.png 27-Nov-19 12:39 PM TRT are the straws 27-Nov-19 12:39 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/unknown-86984.png 28-Nov-19 08:54 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20191128_174733-7F742.jpg 28-Nov-19 08:54 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20191128_175604-3B145.jpg 28-Nov-19 08:54 AM the thing is taking shape 28-Nov-19 11:42 AM it's a thing 28-Nov-19 11:42 AM so, I kinda breifed through some of the Radium talk.. but was difficult to reply when in class.. 28-Nov-19 11:42 AM I want to question methods for extraction, purely theoretical 28-Nov-19 11:42 AM I figured my initial thought on basically using an aprotic solvent (Ra reacts with polar liquids, including water, from what I read) to "suspend"/release the molecules from the paint, and centrifuge it .. being fairly large/heavy I would think it would form at the tip of the pellet? 28-Nov-19 11:42 AM there's also possiblity to oxidize/reduce it (bring it into a solution, then precipitate it out) 28-Nov-19 11:52 AM the issue is that we're talking about absolute tiny amounts of Ra 28-Nov-19 11:53 AM yeah, maybe 1uG per hand.. but if we disregard that and assume larger (for the sake of conversation?) 28-Nov-19 11:53 AM let's assume a watch has 0.2 µCi (very optimistic estimate based on this: https://www.orau.org/ptp/collection/radioluminescent/radioluminescentinfo.htm) 28-Nov-19 11:53 AM that's still just 200 ng of Ra 28-Nov-19 11:53 AM plus I have no idea about what compound is used 28-Nov-19 11:54 AM compound? as in the photoluminescence stuff? 28-Nov-19 11:54 AM likely ZnS, as stated in the paper 28-Nov-19 11:54 AM what radium compound 28-Nov-19 11:54 AM the scintillator is ZnS:Ag 28-Nov-19 11:55 AM (I thought Cu over Ag...) 28-Nov-19 11:55 AM modern ZnS uses Cu 28-Nov-19 11:55 AM cheaper, and works 28-Nov-19 11:55 AM oh, ok 28-Nov-19 11:56 AM but, regardless.. 28-Nov-19 11:56 AM but either way, it's some ZnS ^^ 28-Nov-19 11:56 AM the Ra is likely not pure Ra is what you are saying? 28-Nov-19 11:56 AM some salt or similar? 28-Nov-19 11:56 AM yep 28-Nov-19 11:56 AM ahh, alright, I was not considering that 28-Nov-19 11:56 AM has to be held in the paint somehow 28-Nov-19 11:56 AM well, could be suspended, no? 28-Nov-19 11:56 AM small particles 28-Nov-19 11:57 AM radium is very instable in air and will form some kind of compounds 28-Nov-19 11:57 AM the issue is the reactivity that I already mentioned (thus why aprotic solvents) 28-Nov-19 11:57 AM a "small" oxide layer on the outside of clumps wouldn't be that big of a deal 28-Nov-19 11:57 AM plus oxides/hydroxides are still going to be radioactive, right? 28-Nov-19 11:57 AM sorry, I simply don't know enough about that stuff 28-Nov-19 11:59 AM yeah, but many oxides / hydroxides are hydroscopic 28-Nov-19 11:59 AM liquefying the paint 28-Nov-19 12:00 PM I think the term is hygroscopic 28-Nov-19 12:00 PM right, sorry 28-Nov-19 12:00 PM I knew something! 28-Nov-19 12:00 PM Radium sulfate might be a canidate 28-Nov-19 12:02 PM most of the lacquers we used when reluming hands early this week (purely a ZnS:Cu matrix in lacuer, no Ra) could be diluted with an acetate solvent, like butylacetate (somethings with a 2-ethoxy-butylacetate in there) 28-Nov-19 12:02 PM but that is slightly modern 28-Nov-19 12:02 PM but, simply stating a possible solvent that may have sorta been used? 28-Nov-19 12:02 PM and, clearly acetates are protic 28-Nov-19 12:02 PM wow 28-Nov-19 12:02 PM no 28-Nov-19 12:02 PM but the Ra didn't have to go into solution 28-Nov-19 12:03 PM sorry, my mind went off 28-Nov-19 12:03 PM could be suspended 28-Nov-19 12:03 PM acetate is a carbonyl, but no protic Hydrogen 28-Nov-19 12:03 PM anywho, a pretty polar aprotic solvent 28-Nov-19 12:03 PM looks like fractional crystalization of the chlorides were once used for purification 28-Nov-19 12:08 PM historical accounts of stuff involving luminous paint are always so hard to stomach haha 28-Nov-19 12:08 PM "Quoting Ross Mullner "there were so many radium painters in that country that it was common to recognize them on the streets even on the darkest nights because of the glow around them: their hair sparkled almost like a halo."" 28-Nov-19 12:08 PM from the page giga linked 28-Nov-19 12:09 PM ah, some info on solubility, DOI: 10.1021/ja02236a001 28-Nov-19 12:09 PM looks like they fumed radium bromide (with sulfuric) 28-Nov-19 12:14 PM yeah there's no way to extract radium safely or in useful quantities 28-Nov-19 12:14 PM other pages state chlorides are soluble, so simply + sodium sulfate to pcpt it out 28-Nov-19 12:14 PM it's not about the practicality, heh 28-Nov-19 12:14 PM it's more of: I have no idea how it would be done 28-Nov-19 12:15 PM it wouldn't, there's no process developed for this 28-Nov-19 12:15 PM they'd just pack it into barrels and store it 28-Nov-19 12:19 PM sulfates soluble in conc sulfuric.. may be one starting point 28-Nov-19 12:19 PM hrm, yeah.. not something I am going to attempt any time soon 28-Nov-19 12:25 PM you'd need to know what mix of radium compounds there is 28-Nov-19 12:25 PM chloride, sulfate, whatever 28-Nov-19 12:26 PM from what I read, it is likely the sulfate.. but it's also very insluble in most organic sovlents/alcohols 28-Nov-19 12:26 PM and certainly not in non-polar solvents 28-Nov-19 12:26 PM yeah, iunno.. just a small mind exercise 28-Nov-19 12:27 PM the thing giga linked said a gemologist working for Tiffany used "radium-barium carbonate with zinc sulfide and linseed oil" 28-Nov-19 12:27 PM so you may need to account for other compounds besides straight radium ones as well 28-Nov-19 12:28 PM ah, yeah, they didnt need pure, I suppose 28-Nov-19 12:28 PM likely cheaper 28-Nov-19 12:28 PM then you get no yield 28-Nov-19 12:28 PM but your vial is suddenly super contaminated 28-Nov-19 12:28 PM ... oh wait 28-Nov-19 12:28 PM that is the yield 28-Nov-19 12:31 PM only scenario i can come up with where this is even a sorta useful thought exercise is if you stumbled on a jar of old radium paint...but even then why would you even want to touch it much less try to extract anything from it 28-Nov-19 12:31 PM thats one of those things you see in an old clock in an antique shop, close it back up, and pretend you never saw it 28-Nov-19 12:32 PM we have already painted hands simply in some vials in lista cabinets 28-Nov-19 12:32 PM I do wonder if it could be 'useful' to some degree.. I mean, if you want an alpha particle source 28-Nov-19 12:39 PM it's beta and alpha 28-Nov-19 12:41 PM dunst, I thought.. ughf 28-Nov-19 12:41 PM betaluminescent paint :P 28-Nov-19 12:42 PM :/ 28-Nov-19 12:46 PM it does have alpha in its decay chain 28-Nov-19 12:46 PM ZnS paint reacts to both 28-Nov-19 12:46 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/radondecay_1-40A1E.png 29-Nov-19 01:18 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20191129_101749-44EB1.jpg 29-Nov-19 01:18 AM Since finding a gate valve for KF16 is gonna be a bit wee impossible for me, I think I can get away with a normal high flow valve like those cheap ones on ebay, and a glass manipulator to move it in and out. 29-Nov-19 01:28 AM I have some straight KF16 ball valves I can throw in Das Paket if that helps you in any way 29-Nov-19 01:28 AM https://www.novotek.de/Vakuumventile-KFISO-KCF/Schieberventil-handbetaetigt-mO-Ring-Dicht-Al-NW-16.html (not suggesting you get one of those, but aren't they cute? <3) 29-Nov-19 01:28 AM also: Why KF16? 29-Nov-19 01:35 AM Because the rest of my equipment is KF16 29-Nov-19 01:36 AM ah, fair enough 29-Nov-19 01:38 AM absolutely cute 29-Nov-19 01:38 AM Well, if you absolutely don't need one of those ball valves, I can surely put it to use 29-Nov-19 01:44 AM ^.^ 29-Nov-19 01:48 AM breechloading of the rail gun, nice 29-Nov-19 01:49 AM shhh, they must not know @Nixie is building space weapons! 29-Nov-19 01:52 AM XDDD, I know it has a different name, but I can't remember it...and it also looks like a gun loading mechanism. 29-Nov-19 02:14 AM :)) 29-Nov-19 02:14 AM "looks like" 29-Nov-19 02:14 AM pewpew 29-Nov-19 07:23 AM Btw, the big worksop project got scrapped. 29-Nov-19 07:23 AM At least I won't need to do the whole floor, altough I was looking forward to it. 29-Nov-19 07:26 AM F 29-Nov-19 09:38 PM Space weapons. That should be it’s own discussion group. 29-Nov-19 09:38 PM Or does DARPA already have that one? 29-Nov-19 09:38 PM Oh great. I’m probably on another list now. 29-Nov-19 09:52 PM VAT valves are great 29-Nov-19 09:52 PM And their documentation is available! 29-Nov-19 09:52 PM @GigaSquirrel maybe you have more than one spare ball valve... :P 29-Nov-19 09:52 PM I'm not sure what other kind of cheap valve I can use for simple foreline isolation 29-Nov-19 09:52 PM @Nixie if you want a simple KF isolator, buy one of the tiny straight through VAT valves 29-Nov-19 09:52 PM this kind 29-Nov-19 09:52 PM https://i.spirit.re/HNyKt.png 29-Nov-19 09:52 PM they have a straight passthrough when they're open 30-Nov-19 12:35 AM @Deleted User are you saying you want one as well? 30-Nov-19 12:35 AM maybe 30-Nov-19 12:36 AM and the valve works perfectly well for foreline isolation, I had one of these on my chamber back when I reached e-8 the first time 30-Nov-19 12:36 AM well maybe I have one or two more :P 30-Nov-19 12:36 AM they're all SS with a PTFE gasket 30-Nov-19 12:51 AM If you maybe have one or two more, let me know how much you want for one :P 30-Nov-19 12:51 AM I don't know if I want a pneumatic valve or a ball valve 30-Nov-19 12:51 AM I'm building a pneumatic system for the gate valve, but one of my other KF16 valves is a balzers manual bellows valve, and the other other KF16 valve is a balzers solenoid-operated NC bellows valve 30-Nov-19 12:51 AM in short: a real mish-mash of parts. 30-Nov-19 02:22 AM @Deleted User thast what this part of the draing was: (Not my best drawing) 30-Nov-19 02:22 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/Screenshot_20191130-112156-6AA6E.png 30-Nov-19 10:06 AM I don't understand why so many of these valves are pneumatic 30-Nov-19 10:06 AM Is it to prevent electromagnetic interference from a solenoid into your vacuum system?? 30-Nov-19 10:40 AM fast acting and cheap 30-Nov-19 10:40 AM labs often have air in them anyway 30-Nov-19 11:25 AM probably easier to run air lines from a control box than electrical too where you need to worry about shorts 30-Nov-19 11:25 AM if an air line gets crunched its no big deal, you just have an air leak and a valve doesnt open 30-Nov-19 11:25 AM "cheap" doesn't make sense because you still need a solenoid valve somewhere to switch the air 30-Nov-19 11:25 AM And gas cylinders aren't cheap either... I swapped a nitrogen tank about 2 weeks ago and it's already (leaked) out a decent amount (or the change in weather has made the pressure drop enough for me to notice) 30-Nov-19 11:25 AM Hmm, shorts I guess might make sense 30-Nov-19 11:25 AM But usually chambers have electrical feedthroughs in anyway 30-Nov-19 11:25 AM Fast might make the most sense I guess, though idk how quickly air pistons compare to electric 30-Nov-19 11:28 AM compressors are cheap, you probably would not use a gas cylinder to run systems in most settings afaik 30-Nov-19 11:28 AM you would just connect up air from a central supply 30-Nov-19 11:28 AM big industrial compressor 30-Nov-19 11:28 AM or a small compressor inside if it is standalone 30-Nov-19 11:28 AM only need 40-80psi to run most valves that i have seen 30-Nov-19 12:49 PM Hmm, i do have a compressor already, and I might even have an electric control valve for the high pressure 30-Nov-19 12:49 PM Bought an MFC last week when I think all I need is just a valve like that 30-Nov-19 01:12 PM Those valves have a huge flow rate 30-Nov-19 01:12 PM An MFC is made to introduce tiny controlled amounts of gas into the chamber 30-Nov-19 01:12 PM Those are gate/isolation valves with zero proportional control 30-Nov-19 01:12 PM Full on, full off. 30-Nov-19 06:05 PM Yeah, pretty much what i wanted for one of the chemicals that just needs to volatilize with heat and vacuum 30-Nov-19 06:05 PM I figured an MFC would just run full-open since I doubt my flow from volatilization will fulfill the max setpoint 30-Nov-19 11:24 PM @Mason_Yu any more info about the lasers and other bits? 30-Nov-19 11:25 PM I am thinking about getting the Raycus laser with a 2nd hand galvanometer from the same seller. Might be able to put together a 20W laser etching system for less than $1000 30-Nov-19 11:26 PM That $1000 tag hurts :c 30-Nov-19 11:26 PM Any used q-switched lasers? They don't really age 30-Nov-19 11:26 PM That's for everything though with shipping included. 30-Nov-19 11:26 PM I think the q-switched lasers are usually about the same price too, with all the optics you're still looking at around $1000 30-Nov-19 11:27 PM Pulsed lasers are q-switched 30-Nov-19 11:27 PM Well, kinda sorta, but yes. 30-Nov-19 11:27 PM I have been looking at both pulsed and CW lasers 30-Nov-19 11:27 PM There's no actual acousto-optical modulators in them 30-Nov-19 11:27 PM But there's a seed pump followed by some magical spliced power pumps 30-Nov-19 11:27 PM Raycus makes both 30-Nov-19 11:28 PM Q-switched or high power pulsed are pretty much a must for etching or milling 30-Nov-19 11:28 PM For serious milling you want >50-90kW pulses to ablate things well and clean 30-Nov-19 11:28 PM Yeah, I think those are the only ones I gave links for. I don't think they sell q-switches independently though 30-Nov-19 11:29 PM They can't be sold separately 30-Nov-19 11:29 PM They're installed in the guts 30-Nov-19 11:29 PM Unless you use a passive q-switch after the optical isolator, but then you defeat the point of a powerful pulsed laser. 30-Nov-19 11:29 PM I did look into that as well to see if I could make something myself, but yeah, the conclusion is no 30-Nov-19 11:30 PM Regardless, are there any used offers for the lasers themselves? 30-Nov-19 11:30 PM There's 10, 12, 15 year old IPG lasers that are still perfectly functional 30-Nov-19 11:32 PM It's rare if you want used Chinese knockoff lasers. These companies are fairly new, and there's not really a market like eBay in China where people will sell anything "Hi Tech" for less than new price (~$600 in this case) 30-Nov-19 11:32 PM I'd grab a complete laser+galvo+card set for maybe $650-750 30-Nov-19 11:32 PM Used galvos/lenses/card, or used everything 30-Nov-19 11:32 PM I can't quite justify $1000 yet 30-Nov-19 11:32 PM Not without certainty that I'd be able to make high quality boards, and do deep metal milling, at least. But with a 20W laser that's a gamble. 30-Nov-19 11:34 PM Shipping and any duties or taxes is not included in that $600... 30-Nov-19 11:34 PM Shhh... duties can be... cough 30-Nov-19 11:34 PM Shipping is a pain yes 30-Nov-19 11:35 PM Define deep? Like millimeters? 30-Nov-19 11:35 PM Yes 30-Nov-19 11:35 PM It's definitely doable, there's a few examples 30-Nov-19 11:35 PM Hell, Trumpf makes a whole micromachining center. 30-Nov-19 11:35 PM https://www.youtube.com/watch?v=i88FwTLSJlE 30-Nov-19 11:35 PM This dude punches through copper, the bane of pulsed lasers, with 20W 30-Nov-19 11:36 PM Yeah I have seen that, just raises an edge/ridge that has to be cleaned off 30-Nov-19 11:36 PM Tool steel in other videos 30-Nov-19 11:36 PM It raises an edge, but that can be cleaned off with custom software written specifically for milling 30-Nov-19 11:36 PM EzCAD is a clunky crutchy thing of weirdness. 30-Nov-19 11:57 PM I don't really have the money now to justify buying anything yet. But from what I can put together, a new 20W pulsed fiber laser, a galvanometer with the EzCAD card and focusing optics, I'm looking at $980 with shipping included to the US 30-Nov-19 11:57 PM What about shipping to Belarus? 30-Nov-19 11:57 PM Should be cheaper 01-Dec-19 12:01 AM Yeah, it's about $960 USD to Belarus if I ship from Hong Kong. I'm not including power supply here but it only needs 24V, and I think you might be able to get cheaper optics/galvanometers if you go on eBay 01-Dec-19 12:01 AM The 20W laser is $700, right? 01-Dec-19 12:02 AM Correct, that's from Raycus, the cheapest of them all 01-Dec-19 12:03 AM Bah, the pain 01-Dec-19 12:03 AM Still a LOT cheaper than eBay offers 01-Dec-19 12:03 AM But not quite in my comfort zone 01-Dec-19 12:03 AM ... Halfsies, and paying for teleportation once in a while? :P 01-Dec-19 12:05 AM Same for me, it makes me wonder why eBay prices are so high. There's a whole industry in China where people would set up street stalls with a fiber laser marking stuff on phone cases, water bottles... 01-Dec-19 12:05 AM The cheapest eBay/aliexpress/whatever lasers are $2600-3500 for 20W 01-Dec-19 12:05 AM It's what, an extra $100 in parts to build the rest? So pretty much around $1000 all-in 01-Dec-19 12:05 AM Though if I were to get one, I'd build a micro 5 axis stage for it, to do proper micromachining 01-Dec-19 12:05 AM And write my own pew pew driver software 01-Dec-19 12:05 AM Curiously enough the Chinese EZCAD makers provide an API! 01-Dec-19 12:08 AM I also wonder if I can put a unit on a CNC gantry as a changeable tool, so you can mark any part over a large area 01-Dec-19 12:08 AM the ProtoLaser U3 does that but in reverse 01-Dec-19 12:08 AM the laser is stationary, PCBs move 01-Dec-19 12:08 AM I'll try tempting my friend with $960 01-Dec-19 12:08 AM Maybe he'll split the price with me 01-Dec-19 12:12 AM Also, a complete machine like the one shown on the Youtube video is around $1800 new, also 20 W pulsed. For CO2 lasers that price can drop to $700 if you don't need to do metal 01-Dec-19 12:13 AM CO2 lasers suck for engraving anything but dumb text and graphics on stuff 01-Dec-19 12:15 AM Man I need to do one big order from China, I messed up my CNC spindle a few days ago and I'm really tempted by the high speed ATC spindles made by Jianken. I think that would take priority over the laser, but it'd set me back like $2000 01-Dec-19 12:15 AM Oh! 01-Dec-19 12:15 AM Look at Mechatron. 01-Dec-19 12:15 AM Stupid cheap ATC spindles! 01-Dec-19 12:16 AM I just saw Marco's video, don't need more temptations 01-Dec-19 12:16 AM And guaranteed German <2um runout 01-Dec-19 12:16 AM I do want more power, like 2.2 kW to 40000 RPM, water-cooled 01-Dec-19 12:16 AM I'd buy the ATC from Mechatron and a crappy but powerful spindle from China. Since the runout of the motor itself doesn't matter, it's a great cheap option. 01-Dec-19 12:16 AM They make ATCs just for gluing onto regular (cough Chinese cough) spindles 01-Dec-19 12:22 AM Well, I'm going to get a quote, but I think a spindle with internal drive and ceramic bearings will be more rigid and maintain precision at high speeds 01-Dec-19 12:22 AM https://www.youtube.com/watch?v=h9q6j7POgOI 01-Dec-19 12:22 AM a spindle with ceramic bearings will scare itself apart with any shock load 01-Dec-19 12:25 AM I think if we're talking about a crash situation both steel and ceramic are not going to do well. But I was told the bearings are replaceable and quite reasonably priced. $200 for the thrust bearings in the end 01-Dec-19 12:25 AM Not crash, but like... any serious plunge load 01-Dec-19 12:25 AM Side or down 01-Dec-19 12:25 AM I have a feeling that ceramics are made for stuff like mold surface finishing 01-Dec-19 12:26 AM Yeah, for running high speed machining strategies 01-Dec-19 12:26 AM Which is likely what you want anyway with a spindle that don't have low end torque 01-Dec-19 12:28 AM That Jianken spindle is looking quite attractive 01-Dec-19 12:28 AM But... $2000? 01-Dec-19 12:28 AM They're $1300 if you want the 2.5 kW 24000 rpm version, shipping is very very expensive though since they're so heavy 01-Dec-19 12:33 AM You tempt me so 01-Dec-19 12:33 AM But alas, I must not, because I rarely use my router 01-Dec-19 12:34 AM Just looked at the freight shipping price and it's actually not so bad... $2000 is with VFD, shipping and also 3 ISO20 holders that's pretty precise 01-Dec-19 12:35 AM I am unsuccessful in tempting my friend into dropping some cash for the laser 01-Dec-19 12:35 AM Seems like he wants to get a better lathe 01-Dec-19 12:35 AM I guess my 5-axis laser micromachining center will remain a dream for a while longer 01-Dec-19 12:36 AM What do you want to make with that? 01-Dec-19 12:36 AM Lots of interesting parts 01-Dec-19 12:36 AM The first use will probably be PCBs, including fancy curved stuff 01-Dec-19 12:36 AM Then I'll look into the laser modes to see how smooth I can make it polish 01-Dec-19 12:36 AM If I can make it polish smoothly enough, I'll try depth control... and if that works, the possibilities are endless 01-Dec-19 12:36 AM At that point it's basically a virtual and quite unlimited sinker EDM 01-Dec-19 12:38 AM That works with non-conducting materials too! 01-Dec-19 12:38 AM Indeed, if it works with copper it'll vaporize pretty much anything 01-Dec-19 12:38 AM ... except LWIR lenses I suppose 01-Dec-19 12:38 AM Oh, and of course the now-almost-tacky 3D glass/acrylic bubble engraving 01-Dec-19 12:41 AM You need a different lens for that? 01-Dec-19 12:42 AM Might be able to get away with a regular lens and some focus tweaking 01-Dec-19 12:42 AM The only difficult thing I'm certain I'll hit if I build this is depth control versus material versus laser settings 01-Dec-19 12:42 AM That'll be a potpourri of variables 01-Dec-19 12:42 AM Since if you're making depth-controlled parts(not straight-through milling), you need to know the exact ablation rate for each pass 01-Dec-19 12:42 AM Both to keep the part within dimensions and to keep the focus in sync 01-Dec-19 12:45 AM If you have the galvanometer mounted on a 3 axis CNC, you might be able to do a pretty large bubblegram and have better depth control by adjusting the focus continuously. Keep all laser parameters the same and just move the work piece 01-Dec-19 12:49 AM That's the only way bubblegrams are made 01-Dec-19 12:49 AM Ensuring the laser is out of focus anywhere but your plane 01-Dec-19 12:49 AM I need to become Marco and have people donate a couple grand a month to my Patreon, then I can be a real mad scientist 01-Dec-19 12:50 AM I guess the same principle would apply to micro machining too. You would want to keep the focus plane on the surface at all times to have predictable ablation rates 01-Dec-19 12:50 AM Within a few hundred microns you lose ablation power on metals completely with 20W 01-Dec-19 12:50 AM As demonstrated by the videos 01-Dec-19 12:50 AM The Z axis is probably the easiest, but writing the software for it all and adding three rotational axes will be hard 01-Dec-19 12:50 AM But if I can make a proof of concept, I'm sure someone would pick it up... 01-Dec-19 12:50 AM Though I'm sure it'd sell too 01-Dec-19 12:50 AM Imagine giving jewelers a tool to build full dioramas within the ring band 01-Dec-19 12:50 AM That'd sell like hotcakes 01-Dec-19 12:53 AM I think etching machines that incorporate a 4th axis already exist, but with proprietary software and no one common gcode flavor 01-Dec-19 12:54 AM It's like a 3+2 vertical machining center, but your endmill seems to behave in a non-Euclidean way in the Z plane. 01-Dec-19 12:54 AM And your feed rate is actually spacetime 01-Dec-19 12:54 AM 4 axis engravers exist, sure, but they can't do anything close to this 01-Dec-19 12:54 AM No depth control, no live focus adjustment, no tilting 01-Dec-19 12:54 AM Did I just invent a product that someone will steal? 01-Dec-19 12:58 AM Software would be the biggest hurdle. It would be great if this is combined with conventional micro-machining with endmills for roughing, everything share the same motion platform anyway 01-Dec-19 12:58 AM I could throw a spindle in there 01-Dec-19 12:58 AM (at your expense) 01-Dec-19 12:58 AM :P 01-Dec-19 12:58 AM something like this 01-Dec-19 12:58 AM https://www.ebay.com/itm/NSK-Nakanishi-Spindle-50000rpm-NR50-5100-ATC-RS-EM3060J-W-Control-Unit-NE211/323911872837 01-Dec-19 12:58 AM But then I'd have to get a beefier motion setup 01-Dec-19 01:02 AM I think a normal CAM software like Fusion 360 can be used to generate the g-code actually. Nothing stopping the laser from being just another tool in the tool library 01-Dec-19 01:03 AM Except speed and depth 01-Dec-19 01:03 AM Unless you want GB-sized files for tiny parts and hours worth of post processing 01-Dec-19 01:03 AM Going to take a nap now, 12 PM already 01-Dec-19 01:07 AM Why would speed and depth be an issue? If you generate the code so the laser is always in focus perpendicular to the work-piece, then you have a constant material removal rate that you can calculate the speed from. At least in Fusion, multi-dimensional toolpaths can be generated with tool tip (focal point) being at the surface. 01-Dec-19 01:07 AM Yeah, time for me to sleep too, 4 am here 01-Dec-19 01:07 AM Except it's like an infinitely small tool(ish) with no known feedrate 01-Dec-19 01:07 AM And no known depth 01-Dec-19 01:07 AM which is more important 01-Dec-19 01:07 AM I'd write a postprocessor for laser specific operations and leave the rest up to Fusion/Inventor CAM 01-Dec-19 01:08 AM A lot of trial and error is required here 01-Dec-19 01:08 AM CAM processor switches to tool X, the rest of the block is skipped and processed internally by the laser 01-Dec-19 01:08 AM then switching to tool Y goes back to roughing 01-Dec-19 01:08 AM Gnight 01-Dec-19 01:09 AM Gnight! 01-Dec-19 09:10 AM That's a tempting spindle to throw on the gantry I have downstairs... 01-Dec-19 09:10 AM Like I'm so torn at this point between trying to make that thing a PnP since its really clean and setup for something like that almost already. Has a panel tractor feed so it would be perfect. But PnPs are showing up at surplus for like a grand... sure each feeder will run you like 250-500 bucks a pop... but for a nice fast multihead Samsung PnP... Jeez... 01-Dec-19 10:55 AM Do you think it has enough rigidity? This spindle is really heavy (15-20 kg) and cutting vibration is significant. You'd need a steel, granite or epoxy granite frame and some beefy linear rails. 01-Dec-19 10:59 AM I mean the head rides on these... 01-Dec-19 10:59 AM https://i.imgur.com/uvwCNyD.jpg 01-Dec-19 11:00 AM Oh, high pitched ball screws. Pretensioned? 01-Dec-19 11:00 AM You might want to limit the rapid speed with a spindle like that, it's scary 01-Dec-19 11:00 AM I would imagine so this was designed for sub mm precision for laying epoxy around chip dies 01-Dec-19 11:00 AM https://i.imgur.com/3dxoDJS.jpg 01-Dec-19 11:00 AM but yea there is actually a lot of stuff on the head already that can be removed to reduce weight that was for the old pneumatics systems and such 01-Dec-19 11:01 AM Precision of the ball screw is likely not an issue. The gantry is steel or aluminum? 01-Dec-19 11:02 AM I am not sure about the framing, I think that is steel, but all those bits the gantry itself is on that's black I believe is aluminum 01-Dec-19 11:02 AM https://i.imgur.com/97eh07Q.jpg 01-Dec-19 11:02 AM its a big heavy thing 01-Dec-19 11:03 AM Hmm, yeah that might be the biggest issue, the gantry will droop and vibrate like crazy if it's aluminum with holes in it 01-Dec-19 11:03 AM yea, its not really designed to be a machining tool 01-Dec-19 11:03 AM https://i.imgur.com/9OnBs2g.jpg 01-Dec-19 11:04 AM Not a lot of z-travel neither. I would recommend getting a lighter high speed spindle instead of the Jianken one with ATC 01-Dec-19 11:05 AM fair enough, I am still not sure if I will make it a CNC or continue my idea of making a PnP out of it 01-Dec-19 11:07 AM Does the pneumatics work? 01-Dec-19 11:07 AM oh yea the machine was de-installed functioning, though some valves are a little leaky, needs new seals probably 01-Dec-19 11:10 AM I just found a high pitched ball screw very similar to yours in a dumpster 01-Dec-19 11:10 AM About a meter in length, but I can't take it home just yet, not until it stops snowing 01-Dec-19 11:12 AM nice 01-Dec-19 11:22 AM @Conmega what about a PCB manufacturing tool in general? 01-Dec-19 11:22 AM You don't need a ton of Z travel to do high speed PCB milling(like with that Nakanishi spindle), then drilling, then applying solder paste, then pick and place 01-Dec-19 11:22 AM ... with a giant switch to just flip the machine between modes lol 01-Dec-19 11:22 AM Could also be fun to experiment with an automatic via thing-inserter-soldering-machine, to drop the plating step from the process 01-Dec-19 11:33 AM eh I personally just order boards nowadays even for one-offs, its so cheap and the capabilities for that money is awesome 01-Dec-19 11:33 AM also solder paste I've been trying to do stenciling since I assume the paste dispensing is slow, messy, and not entirely precise... just something I figured is best to stick to stencils with 01-Dec-19 11:49 AM Well, OpenPNP it is then 01-Dec-19 11:49 AM Dispensing glue and solder paste is still a good idea 01-Dec-19 11:50 AM So I'd love to just use OpenPNP, but problem is none of the out of the box controllers support closed loop servo drives... 01-Dec-19 11:50 AM Just do homing and keep the control loop inside the drives 01-Dec-19 11:51 AM So I am putting LinuxCNC on there with MESA controllers and seeing if I can have them intermingle, others have apparently done it before but not documented it. 01-Dec-19 11:51 AM What drives? the drives on the servos takes +10/-10vdc in and then you have encoders... 01-Dec-19 11:51 AM Well, you'd replace them 01-Dec-19 11:52 AM the original controller was an MEI dsp board 01-Dec-19 11:52 AM which good luck getting softare/drivers for 01-Dec-19 11:52 AM Keep the servos, swap the drives 01-Dec-19 11:52 AM DC servos are easy to drive 01-Dec-19 11:53 AM I mean the original drives work great, why replace them when for like 200 bucks I have MESA cards handling driving them and taking the encoder inputs 01-Dec-19 11:53 AM That works too 01-Dec-19 11:54 AM that also gives me the extra I/O I need for driving everything else in the machine 01-Dec-19 11:54 AM since the I/O in that machine uses the same 50 pin I/O standard as the MESA board so litterally just a straight connection then HAL config 01-Dec-19 12:20 PM Anyone ever dealt with laser interferometers before? 01-Dec-19 03:13 PM I've thought a lot about them 01-Dec-19 03:13 PM Got some of the laser diodes applied science was showing to be self-interfering 01-Dec-19 03:13 PM Wanting to make a fizeau for a while 01-Dec-19 03:13 PM As well as michaelson 01-Dec-19 04:25 PM Welcome to the server @robotgrrl ! 01-Dec-19 04:25 PM Getting a SEM yet? 01-Dec-19 05:34 PM Haha maybe. Have a lot to learn first! 01-Dec-19 05:35 PM Jumping right in ain't a bad way of doing it 01-Dec-19 05:35 PM Just have to be careful with the high voltage... 02-Dec-19 06:06 AM Pfft I've licked higher voltage 02-Dec-19 06:07 AM 40kv? 02-Dec-19 06:14 AM I've licked the LHC, I'm pretty certain I'm the only person who's done that. Fairly sure I licked a grounded section though 02-Dec-19 06:14 AM Either that or this is all a coma dream 02-Dec-19 10:20 AM 02-Dec-19 10:42 AM tbh being at cern feels like a coma dream 24/7 02-Dec-19 11:04 PM gnaah waits impatiently for the end of work 02-Dec-19 11:04 PM I want to test things in my chamber! 02-Dec-19 11:04 PM grid size vs plasma stability, different ways to use my ion source and whatnot 02-Dec-19 11:08 PM are you just playing with air plasmas? the pinkish color in your photos looked right but i wasnt sure lol 02-Dec-19 11:08 PM yeah, atm just air 02-Dec-19 11:15 PM trying to get everything working before I fill it with D2 02-Dec-19 11:15 PM before I replace the impatience pink with the spicy pink 02-Dec-19 11:18 PM someday i will get around to doing a fusor...but a lot of stuff to get working before that and i have easier projects to play with in the meantime heh 02-Dec-19 11:19 PM tbh a fusor is a pretty easy project 02-Dec-19 11:20 PM totally i just have to get measuring gear going for neutrons first...and finish up my vacuum system(s) haha 02-Dec-19 11:20 PM the stuff i gotta make for those is all easy just a lot to do 02-Dec-19 11:27 PM oh, plural? 02-Dec-19 11:32 PM yeah...first i bought an air cooled diffusion pump intending to set that up. then i scored that super cheap turbo pump. 02-Dec-19 11:32 PM so somehow i ended up building two vacuum systems i guess? 02-Dec-19 11:32 PM my first vacuum related project was fixing up that turbo once i determined the hall sensors were dead 02-Dec-19 11:32 PM got busy with other stuff for a few months in the middle too 02-Dec-19 11:33 PM and now use the diff to back the turbo! 02-Dec-19 11:33 PM thinking i might get both systems up and running right at the same time actually haha 02-Dec-19 11:34 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20191102_145025-B0B34.jpg 02-Dec-19 11:34 PM got very lucky and scored two D2.5E roughing pumps for $70 on eBay and shockingly they both work pretty well 02-Dec-19 11:34 PM so running both systems at the same time isnt out of the realm of possibilities 02-Dec-19 11:34 PM oh yes, the D2.5E is great 02-Dec-19 11:34 PM so quiet <3 02-Dec-19 11:35 PM one of mine needs some diagnosing of why it does not want to pump down as far as the other but both get down plenty far to back either of my pumps 02-Dec-19 11:35 PM often times it's just the oil 02-Dec-19 11:35 PM run it with gas ballast for one or two hours, if you get a significant change in final pressure it's the oil 02-Dec-19 11:36 PM one takes less than 30s to 5E-3 blanked off with a gauge vs the other taking a bit under a minute to reach 1E-2 02-Dec-19 11:36 PM guess i will give that a try once the weather here improves, do not think it would do anything productive to try that with a big rain storm that just passed through and another on the way 02-Dec-19 11:36 PM normally our humidity here in Southern California is wonderfully low 02-Dec-19 11:39 PM that's the whole point of the gas ballast, to make it less sensitive to humidity ^^ 02-Dec-19 11:40 PM does that work if the humidity is like >70%? 02-Dec-19 11:40 PM if it does i guess i do not need to wait lol but i was assuming it would be better to just wait a week or two 02-Dec-19 11:42 PM yep, should work just fine 03-Dec-19 11:26 AM anyone use one of these type of digital microscopes before? 03-Dec-19 11:26 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/image0-DA553.png 03-Dec-19 11:26 AM One on the left on sale was thinking about getting it 03-Dec-19 11:33 AM That's nowhere near worth $88 03-Dec-19 11:33 AM That's a $5 toy 03-Dec-19 11:33 AM Look at the microscope Marco got - that's probably the only digital scope you'd want to buy 03-Dec-19 11:33 AM Otherwise I highly recommend buying an optical one 03-Dec-19 11:53 AM trying to record microfluidics with it so need digital one 03-Dec-19 11:54 AM they have very bad frame rates and often bad resolution 03-Dec-19 11:54 AM the one marco got is acceeeeeeeptable 03-Dec-19 11:54 AM a trinocular microscope or a regular optical binoc with an eyepiece camera 03-Dec-19 11:58 AM hmm ill look around then thanks 03-Dec-19 12:22 PM If buying one, get one with HDMI or VGA output, those have low latency and usually decent optics 03-Dec-19 12:22 PM none of that USB toy stuff 03-Dec-19 12:22 PM I recommend buying a USB machine vision camera instead. 03-Dec-19 12:22 PM Ximea, Point Grey(now FLIR) are the brands I recommend 03-Dec-19 12:22 PM That way you're not at the mercy of some random Chinese algorithm blasting through shutter speeds and frame rates 03-Dec-19 12:25 PM Yeah 03-Dec-19 12:27 PM Ximea cameras are probably the best in the field 03-Dec-19 12:27 PM And Fastvideo recently came out with a free GPU-accelerated toolkit for them 03-Dec-19 12:27 PM Recording included 03-Dec-19 12:58 PM Nice, but dunno how lag free those would be compared to raw VGA or HDMI off a camera going to a screen, for soldering. 03-Dec-19 01:28 PM very lag free 03-Dec-19 01:28 PM I have a ximea camera that I use occasionally, they're very fast 03-Dec-19 01:28 PM 2MP raw at 160fps over USB3 03-Dec-19 01:54 PM Can't live without my stereomicroscope 03-Dec-19 07:20 PM Raspi cameras are pretty reasonable 03-Dec-19 07:20 PM @mike crb what sort of microfluidics are you up to, anything you can discuss? I've been learning about them and nanofluidics for about a decade now. Have been working to build single molecule DNA synthesis, so lots of engineering and not so much experimentation. I'm hoping it will all come together quickly once I figure out a few more nanofab things relating to electrodes and electrochemistry 03-Dec-19 11:28 PM gonna just be playing with mixers to start. 3d printed channels, cast in pdms, dissolve ABS in acetone. fairly large channel stuff until I make a litho setup. 03-Dec-19 11:28 PM mainly want a cheap camera/scope so I can just get close up footage during the process 03-Dec-19 11:28 PM I’d prob end up doing echem stuff with them too, more of a microreactor kind of deal. 03-Dec-19 11:32 PM cheap, high magnification, and digital output rarely mix 03-Dec-19 11:32 PM but you can score deals 03-Dec-19 11:32 PM my advice is to find a used trinocular, or a very good binocular nikon/zeiss/etc microscope, and get an eyepiece camera separately 03-Dec-19 11:41 PM i think trinocular would be good. that’s what im used to using for fabrication stuff. probably just gonna get something lowmag/cheap until I save up for a nicer used one. 03-Dec-19 11:41 PM almost done with last semester of undergrad so just trying to get plans together for some projects I’m trying to start once I have way more free time haha 03-Dec-19 11:41 PM @nmz787 if you ever wanna bounce ideas about nanofab for echem that’s my jam. the microfluidics stuff is something I’m trying to transition towards 04-Dec-19 09:23 AM @mike crb @nmz787 I'm interested in microfluidics too. I've done paper-based microfluidics professionally but interested in dipping my toes in traditional microfluidics. 05-Dec-19 12:07 AM TIL: 3M sells isotopically pure chemicals https://www.3m.com/3M/en_US/company-us/all-3m-products/~/All-3M-Products/Advanced-Materials/Stable-Isotopes/Enriched-Boron-Isotopes/?N=5002385+8745513+8710906+8711017+8719574+8722004+3294857497&rt=r3 05-Dec-19 12:12 AM 3M will sell you anything if you dollar enough 05-Dec-19 01:26 AM Now it's time for "guess this glue!!" 05-Dec-19 01:26 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20191205_012617-382E5.jpg 05-Dec-19 01:28 AM 3M fungus special 05-Dec-19 01:29 AM This is in a roughly 50 year old American Optics fluorescent microscope 05-Dec-19 01:29 AM Soooo yeah, quite possibly 05-Dec-19 01:42 AM AO vertical fluorescence 2071 05-Dec-19 01:42 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20191205_014036-67757.jpg 05-Dec-19 01:16 PM https://twitter.com/Chris_Gammell/status/1202354819282939904 05-Dec-19 01:20 PM 250001200 SMD 05-Dec-19 01:20 PM (metric) 05-Dec-19 10:36 PM everything can be a smd resistor 05-Dec-19 10:36 PM even You! 06-Dec-19 12:16 AM not if I can resist! 06-Dec-19 12:16 AM waaait... 06-Dec-19 04:38 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20191206_110911-ACD18.jpg 06-Dec-19 04:38 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20191206_133233-EEB0F.jpg 06-Dec-19 04:38 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20191206_133315-D0C7B.jpg 06-Dec-19 04:38 AM ion pump teardown! 06-Dec-19 10:17 AM New toy arrived! 06-Dec-19 10:17 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/image0-F084E.jpg 06-Dec-19 10:19 AM ohhhh 06-Dec-19 10:19 AM don't turn it on, take it apart! 06-Dec-19 10:22 AM Got a brand new dsox1204a for $500 on eBay. From a guy in Singapore with zero feedback. 06-Dec-19 10:22 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/image0-6A501.jpg 06-Dec-19 10:24 AM that's... brave 06-Dec-19 10:24 AM glad it worked out! 06-Dec-19 10:25 AM Wow still had the film on the screen even 06-Dec-19 10:25 AM Nice score 06-Dec-19 10:27 AM No probes though. 06-Dec-19 10:44 AM maybe stolen? 06-Dec-19 10:45 AM Seller said he won it as a prize at a seminar 06-Dec-19 10:45 AM Bonus surprise is the 100MHz bandwidth and all license upgrades 06-Dec-19 10:48 AM wow what a deal 06-Dec-19 10:48 AM also its not too brave... eBay will get you your money back 06-Dec-19 10:48 AM its pretty safe tbh 06-Dec-19 10:50 AM Yeah I figured it was worth rolling the dice and would probably get my money back if it was a scam. 06-Dec-19 10:50 AM Congrats! 06-Dec-19 10:53 AM I can't wait until I can get a nice small scope like that, for now older tube based scopes are just so much bang for buck 06-Dec-19 03:59 PM I found out what was moving my pallet stones! 06-Dec-19 03:59 PM we use an oleophobic coating to help keep oil where we want it.. well.. it's basicallye PTFE.. and the solvent is perflourohexane... which dissoles t he shellac that the stones are set in place retty darn quick.. what happens is it first swells it (doesnt stay in long enough to dissolve) and then they move slightly 07-Dec-19 05:58 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20191207_142505-39F6A.jpg 07-Dec-19 05:58 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20191207_143218-94129.jpg 07-Dec-19 05:58 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20191207_143924-5A191.jpg 07-Dec-19 05:58 AM I may or may not have just spent my christmas money already 07-Dec-19 12:42 PM fused quartz? 07-Dec-19 01:12 PM just borosilicate 08-Dec-19 03:46 AM boroboro 08-Dec-19 03:46 AM bro 08-Dec-19 03:46 AM and it's bigger than the inside diameter of my chamber 08-Dec-19 03:46 AM 11/10 panorama 08-Dec-19 05:54 AM \o/ 08-Dec-19 09:51 AM that's what she said 09-Dec-19 06:10 PM You know what, I think I'm going to probably design and manufacture the perfect scalpel 09-Dec-19 06:10 PM I'm sort of tired of all these scalpels being bulky and inconvenient, or maybe I'm just tired of bad scalpel blades 10-Dec-19 04:24 AM like...a surgery scalpel? 10-Dec-19 04:44 AM If you are referring to cutters...I use this model, it's very slim and nice: 10-Dec-19 04:44 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/TAJIMA-LC301-1-326D4.png 10-Dec-19 04:44 AM Made by Tajima 10-Dec-19 05:18 AM ohhh I just had an Idea 10-Dec-19 05:18 AM my leak tester can be set from mass 2 to 4 10-Dec-19 05:18 AM I have to set this thing to 3 and connect it to my fusor, once that's running 10-Dec-19 11:28 AM Can I have a bigger image of the server thumbnail? 10-Dec-19 11:58 AM https://drive.google.com/open?id=0B8vEONWEh7kTdHRYZk9RSTVsY2s 10-Dec-19 11:58 AM https://drive.google.com/open?id=0B8vEONWEh7kTeDlPSloyTlE1YWM 10-Dec-19 11:58 AM https://drive.google.com/open?id=0B8vEONWEh7kTYmstQkhSMHZqc2c 10-Dec-19 11:58 AM Ok those are the high res images of the beam at NWNL 10-Dec-19 11:58 AM Those were something like 5kv 5ma because we were running shield up. 10-Dec-19 12:00 PM awesome, thanks! 10-Dec-19 12:01 PM They are like 26 megs each so I could not upload them here 10-Dec-19 12:02 PM yeah I figured 10-Dec-19 12:04 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/unknown-1908F.png 10-Dec-19 12:04 PM Just for the heck of it here's another cool plasma photo 10-Dec-19 12:04 PM elegant workholding 10-Dec-19 12:05 PM We were testing some stuff so we threw together a bell jar fusor in an afternoon so we could get a better view of the plasma 10-Dec-19 12:05 PM Lol yeah 10-Dec-19 12:05 PM the in an afternoon part lead to that 10-Dec-19 12:05 PM Surprisingly the hose clamp in the production fusor works really well 10-Dec-19 12:05 PM We have done 20 something hour runs on it and have never replaced it. It definitely starts glowing though. 80kv 5ma is a lot 10-Dec-19 12:05 PM We also just order of magnitude or 2 increased neutron output so that's fun. More on that later. 10-Dec-19 04:24 PM @GigaSquirrel WOW beautiful window! I have two 8" conflat windows I need a chamber big enough to put them on still :( 10-Dec-19 10:29 PM thanks, I'm really happy with it! 10-Dec-19 10:29 PM oh wow, a chamber like that must cost you an arm and a leg 10-Dec-19 11:35 PM nice 11-Dec-19 08:38 AM Pезистор. 11-Dec-19 08:38 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20191211_173353-70A81.jpg 11-Dec-19 08:38 AM but I doubt the claimed 30 kV... 11-Dec-19 10:48 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20191211_194514-1849F.jpg 11-Dec-19 10:48 AM F 11-Dec-19 10:48 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20191211_194616-322AA.jpg 11-Dec-19 10:48 AM but I already got a replacement 11-Dec-19 12:55 PM School's out till after new years 11-Dec-19 03:00 PM After the flash, the 500 watt resistor was simply not there anymore! I have never seen such a complete destruction of a ceramic tube core resistor! 11-Dec-19 03:20 PM Oh. I wrote a much longer post and it chopped off all of the top! 30KV rest in a shunt rectifier tube test on a radar pulse modulator. 11-Dec-19 03:20 PM The end terminal on the resistor went high impedance and it started an arc. A moment later the resistor was simply not there. It was then a fine powder embedded all over the inside of the test set which was the size of a commercial refrigerator. 11-Dec-19 03:41 PM Looks long enough to take 30 KV, but only for very short pulses. 11-Dec-19 05:37 PM https://i.spirit.re/KgUvI.png 11-Dec-19 05:37 PM The most important differential pair tuning, ever 11-Dec-19 05:37 PM /s 11-Dec-19 05:49 PM 1ns delay? 11-Dec-19 05:49 PM or rather, equal lengths 11-Dec-19 05:49 PM which imposes delaying the short one 11-Dec-19 05:49 PM I actually didnt know about this till about 4 years ago 11-Dec-19 05:57 PM phase/skew 11-Dec-19 05:57 PM but this is USB, it's absolute overkill 11-Dec-19 09:03 PM @Deleted User I use #3 scalpel handles (the actual medical kind, a single metal piece) and a box of Swann-Morton #10 blades, rather than Xacto knives or any similar “hobby knives”. They’re designed for good handling, precise control, the blades are always totally sharp when new, the blades come sterile, and they’re not that expensive for a carton of blades. 11-Dec-19 09:08 PM If only I didn't live in the middle of nowhere on the wrong continent 12-Dec-19 12:06 AM I haven't actually tested the resistor for 30 kV yet, but it works fine for my application 12-Dec-19 12:18 AM @GigaSquirrel just so you know 12-Dec-19 12:18 AM big green soviet resistors are not usually high voltage 12-Dec-19 12:18 AM also that one looks wrinkly as heck 12-Dec-19 01:21 AM feelin wrinkly today 12-Dec-19 02:12 AM whyyy is everyth so leaky 12-Dec-19 02:12 AM I tested my chamber, moved it from the tester to my turbo and boom, leak 12-Dec-19 02:12 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20191212_103304-00EA4.jpg 12-Dec-19 02:12 AM I'm currently backing the whole system with the tester, will search like that 12-Dec-19 02:47 AM Okay, I want an ultrasonic cleaner for my experiments and such, and I'm not sure what to get (I have to get other things, so I'm looking cheap) any suggestions? I'll post what I have seen: 12-Dec-19 02:47 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/HTB1UPTJOpXXXXbHaFXXq6xXFXXXO-E9B92.png 12-Dec-19 02:47 AM The cheap ones that cost about 25€, a bit shallow. 12-Dec-19 02:47 AM (can barely fit a KF40 sideways) 12-Dec-19 02:47 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/Hc52e3e6684f4493cb9136795cf10c28d1-2C8F6.png 12-Dec-19 02:47 AM Top one is a bit bigger, and 35€ 12-Dec-19 02:47 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/HTB1OvBDvoR1BeNjy0Fmq6z0wVXa9-75C3D.png 12-Dec-19 02:51 AM "Degas" 12-Dec-19 02:51 AM and this one, wich has a "degas" button. 12-Dec-19 02:51 AM and is 50€ 12-Dec-19 02:51 AM saves you time on pumping 12-Dec-19 02:51 AM frick u 12-Dec-19 02:52 AM Go for the biggest one you can afford 12-Dec-19 03:12 AM 35 and 50€ are the same size, 0,8L 12-Dec-19 03:12 AM I'd prefer the 35€ one, as I have to buy other things. 12-Dec-19 03:12 AM unless someone strongly recommends something else. 12-Dec-19 03:46 AM Well, just bought the 35€ one. 12-Dec-19 07:15 AM Can you hook your turbo up to your tester? 12-Dec-19 09:11 AM I got a fancy Branson ultrasonic cleaner and it's amazing compared to my cheap chinese one 12-Dec-19 09:11 AM @AdamMcCombs have you checked your messages lately? 12-Dec-19 09:13 AM @Leona will he hard, but I know the leak is in the chamber, as the pressure rises quickly when I gate off the turbo 12-Dec-19 09:13 AM and foreline pressure sinks significantly if I close the Gate valve 12-Dec-19 11:40 AM I like the Branson brand of ultrasonic stuffs.. I have some ultrasonic homogenizers from them, but they also make baths 12-Dec-19 11:40 AM sub $200 on ebay for something that appears decent size 12-Dec-19 11:40 AM what I want is an ultrasonic vapor degreaser 12-Dec-19 11:40 AM lowest priced one ebay is actually a branson.. https://www.ebay.com/itm/Branson-BTC-200-Ultrasonic-Vapor-Degreaser-with-Neslab-Merlin-M75-Chiller/264304684646?hash=item3d89c96e66:g:c1cAAOSwjiZcyL0i 12-Dec-19 11:40 AM from what I understand, they basically add a heat pump with a cold line/trap right above the liquid level.. so the vapors condense there and back down into the bath, then of course the hot line in/around the bath itself 12-Dec-19 11:40 AM could nearly hack a small refrigerator to do it.. or maybe use peltier and some pumps if you don't care about 'wasting' eelectricity 12-Dec-19 11:40 AM (thoughts?) 12-Dec-19 12:17 PM ooh.. i got a VWR ultrasonic cleaner a while ago that didn't come with a lid, been meaning to get/make one, but.. 12-Dec-19 12:17 PM that definitely gives me the idea of slapping a peltier's cold side on whatever lid i make 12-Dec-19 12:17 PM i specifically wanted a heated ultrasonic cleaner bc a lot of solvents really benefit from the temperature boost, ime. unfortunately it's also incredibly slow to heat up, but it works well enough anyways 12-Dec-19 12:20 PM glad to give the idea, let me know if you go through with it and how it works out! 12-Dec-19 12:20 PM for sure :D 12-Dec-19 12:20 PM we have two ultrasonic baths at school, one for dirtier items, the other once through the dirty side 12-Dec-19 12:20 PM also a steamer 12-Dec-19 12:20 PM but our actual parts cleaners are automated (and has ultrasonics built in) 12-Dec-19 12:20 PM we have the temps on the baths pretty hot, without a lid it all evaporates away 12-Dec-19 12:20 PM also, about to go get food from grocery store 12-Dec-19 12:28 PM cyclical evaporation/condensation in vapor degreasing seems like it must be pretty similar to cloud chambers and acetone smoothers in terms of design, have wondered how difficult it is to figure out optimal geometry & ΔT for such applications 12-Dec-19 12:38 PM @Nixie you can degas by just running the thing for several minutes with nothing but your water/cleaning fluids in it, it works dissolved gases out so cavitation happens on the surfaces of the thing you're cleaning instead of, like, everywhere else 12-Dec-19 12:38 PM sometimes the 'degas' feature is, like, faster? or it uses a weird modulation pattern, dunno. it sounds different on my cleaner 12-Dec-19 12:39 PM I think degas just means sweeping frequencies 12-Dec-19 12:40 PM could be 12-Dec-19 12:40 PM So it shoves the gas around and pushes it up to the surface 12-Dec-19 01:14 PM hrmmm.. 12-Dec-19 01:14 PM I have degas in c hemistry sense, where I would bubble Argon through some liquid for a moment to expell anything that might be in there 12-Dec-19 01:33 PM 20% off onlinemetals today 12-Dec-19 01:33 PM (for $200 or more) 12-Dec-19 01:43 PM In the end I bought the middle one without degas button, as I was buying manyother things but I have limited funding. 12-Dec-19 01:48 PM Just smack it with a mallet a few times 12-Dec-19 01:48 PM There's your DIY degas function 12-Dec-19 02:08 PM Yeah, a mallet wack may be in order. 12-Dec-19 02:14 PM We always put a secondary container in the ultrasonic (beaker etc) and just a tiny bit of water in the main tank, that way we can run acetone or IPA or whatever solvent people want without draining the tank 12-Dec-19 02:16 PM same; Simple Green cleaner + hot water in a ziploc bag, and then that plopped into a water-filled cleaner has worked really well for me 12-Dec-19 02:26 PM we do separate contianers if you dont want previous dissolved gunk to get on the thing you are trying to clean, or yeah, if yu want to run a different solvent 12-Dec-19 11:25 PM Green cleaner? 12-Dec-19 11:41 PM https://simplegreen.com/household/ 12-Dec-19 11:41 PM great stuff 13-Dec-19 12:22 AM oh 13-Dec-19 12:22 AM I wonder what's the spaniard equivalent. 13-Dec-19 12:22 PM I use the extreme version of simple green at home for machinery stuff, it's clear-ish 13-Dec-19 12:22 PM https://simplegreen.com/industrial/products/extreme-aircraft-precision-cleaner/ 13-Dec-19 08:30 PM @Mason_Yu any news on cheaper lasers? 13-Dec-19 08:32 PM The Raycus 20W one is the cheapest new pulsed fiber laser they sell. They do offer low volume discount that can bring the price down to $640 e/a for a total of 3 13-Dec-19 08:33 PM 640 is borderline acceptableish 13-Dec-19 08:33 PM I'm looking at higher power second-hand units myself but they are too bulky to ship economically. Also there's no return on any of the used stuff, including galvos and other optical components 13-Dec-19 08:34 PM well, with galvos and scanheads there's not much to fail 13-Dec-19 08:34 PM but with a laser you're buying a box which you feed volts into and angry photons come out 13-Dec-19 08:34 PM with lots of optical voodoo 13-Dec-19 08:37 PM Oh actually there is a slighly cheaper unit, $676 for a single 20W laser 13-Dec-19 08:37 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/O1CN01ZTQYfJ1hjOnclj0wU_3497474313-14A62.png 13-Dec-19 08:37 PM But I've heard absolutely nothing about this manufacturer and it's currently out of stock 13-Dec-19 08:38 PM that'd be the "super" I'm assuming 13-Dec-19 08:38 PM MFP20F 13-Dec-19 08:38 PM but that's a maxphotonics laser 13-Dec-19 08:38 PM yeah that's not super, super's are blue 13-Dec-19 08:38 PM maxphotonics are alright 13-Dec-19 08:38 PM they're the "low end" one they put into the markers 13-Dec-19 08:38 PM http://www.maxphotonics.com/Products/MFP-20Fguangxianjigu.html 13-Dec-19 08:40 PM Yep, I think this is the company. Looks pretty big and there's datasheets. I can't find the "super" you're referring to though 13-Dec-19 08:40 PM I'm GUESSING it's this one 13-Dec-19 08:40 PM http://en.super-laser.com/products_detail/productId=35.html 13-Dec-19 08:40 PM no info on it though 13-Dec-19 08:40 PM I asked the supplier, bcxlaser(probably the same as yours, just off-the-books), for more information, and haven't heard from them since 13-Dec-19 08:40 PM the MFP-20F is only 5 kilos, so it's not that large 13-Dec-19 08:40 PM it actually looks a lot smaller than raycus 13-Dec-19 08:40 PM yeah it is 13-Dec-19 08:43 PM Well, I'll try calling this company directly 13-Dec-19 08:43 PM 391x260x120 vs 244x200x73 13-Dec-19 08:43 PM raycus vs maxphotonics 13-Dec-19 08:43 PM maxphotonics gave me a price of $1050 for <10 qty for the MFP-20 13-Dec-19 08:43 PM EXW shenzhen 13-Dec-19 08:43 PM but they were very friendly and sent the datasheet over too 13-Dec-19 08:45 PM That's export pricing for sure. If I can get the lasers from Shen Zhen I'll likely get free shipping to HK, saving $30 13-Dec-19 08:45 PM the datasheet I got was for a larger laser though 13-Dec-19 08:45 PM same power rating but 287x219x95 13-Dec-19 08:45 PM the 20/20l/30/50 units are 345.5x266.2x120 13-Dec-19 08:45 PM still totally manageable though, I don't mind that 13-Dec-19 08:45 PM the tiny one is likely to be more expensive 13-Dec-19 08:51 PM The most popular 20W "super" fiber laser seems to be 280×245×117mm 13-Dec-19 08:51 PM quite compact 13-Dec-19 08:51 PM how much is it? 13-Dec-19 08:51 PM I'd guess around $650? 13-Dec-19 08:52 PM oh, you didn't ask for the price 13-Dec-19 08:52 PM No, I can't call now, it's Saturday there 13-Dec-19 08:52 PM Well I guess no harm in trying 13-Dec-19 08:52 PM the only laser I can find with those specs appears to be a JPT clone of IPG 13-Dec-19 08:52 PM but it's the specification for a mopa laser 13-Dec-19 08:52 PM http://www.jptelectronics.com/en/allp_241_1_241.html 13-Dec-19 08:52 PM which is these guys 13-Dec-19 08:52 PM but looks like they don't make non-MOPA lasers 13-Dec-19 09:03 PM Well this is cheaper than I thought, they told me $620 for the 20W "super" lasers 13-Dec-19 09:03 PM they told me $750 13-Dec-19 09:03 PM those are some heavy laowai taxes 13-Dec-19 09:03 PM 620 is actually very reasonable... how about with shipping to Belarus? 13-Dec-19 09:05 PM I don't know how heavy this is, say 10 kg? 13-Dec-19 09:05 PM probably closer to 5 or 6 I think 13-Dec-19 09:05 PM but I have no idea, 280×245×117 doesn't bring up any results besides that JPT mopa 13-Dec-19 09:05 PM if shipping is reasonable, I might actually grab one 13-Dec-19 09:11 PM Umm, it's surprisingly expensive to ship to Belarus. It's like $100 13-Dec-19 09:11 PM thaaaaaat would be unsubsidized pricing 13-Dec-19 09:11 PM ouch 13-Dec-19 09:12 PM Well, surface shipping will be $65 but it may take a month to get there 13-Dec-19 09:12 PM tracked surface? 13-Dec-19 09:13 PM Yep 13-Dec-19 09:13 PM that sounds a bit more reasonable 13-Dec-19 09:13 PM I've recently been having odd experiences with tracked shipping, still seemed to disappear 13-Dec-19 09:15 PM If you are getting one I'm going to ask if he's willing to give a discount if we both get one. Are there anything else laser related you want? MOPA will be out of our price range but they sell galvos and focusing optics as well 13-Dec-19 09:15 PM a full minimal set would be awesome if cheap 13-Dec-19 09:15 PM isolator coupler to the galvo head, galvo head, medium sized field f-theta lens(200x200?), and the weird card for it 13-Dec-19 09:17 PM They've got a range of f-theta lenses from 100mm to 430mm focal length. $60 for F290, 200mm*200mm 13-Dec-19 09:17 PM They sell q-switches too 13-Dec-19 09:18 PM the q-switch is built into the laser 13-Dec-19 09:18 PM it sits before the output fiber 13-Dec-19 09:18 PM No, an indepenet module 13-Dec-19 09:18 PM Not for these as-built fiber lasers 13-Dec-19 09:18 PM yes, but that means you're building your own CW pump system 13-Dec-19 09:18 PM you don't want to know how much that costs 13-Dec-19 09:18 PM though with a direct-path system(no fibers, optical cavity style) you can get picosecond pulses 13-Dec-19 09:18 PM if you can get a nice two unit discount for the laser+optical mojo set I'm up for it 13-Dec-19 09:19 PM That's what I want them for, maybe not picoseconds but short pulses 13-Dec-19 09:19 PM No two-unit discount unfortunately 13-Dec-19 09:19 PM what about the set price? 13-Dec-19 09:19 PM with the f290 lens 13-Dec-19 09:19 PM these lasers can get below 100ns if you tweak the parameters and compromise a bit on power 13-Dec-19 09:19 PM but not far below 100 13-Dec-19 09:20 PM 80 ns is the lowest for these ones 13-Dec-19 09:20 PM yup 13-Dec-19 09:25 PM Galvo for $200 13-Dec-19 09:25 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/TB20o-EAE40.png 13-Dec-19 09:25 PM so probably around $950 for the whole thing with shipping 13-Dec-19 09:25 PM maybe $900 13-Dec-19 09:25 PM which is pretty much the same as the raycus one 13-Dec-19 09:25 PM still need the optics that go before the galvo though, afaik 13-Dec-19 09:29 PM I am assuming you saw this already but just in case....not really the same realm as what you guys are talking but might be entertaining: https://www.youtube.com/watch?v=-BeTq99LqUo 13-Dec-19 09:29 PM yeah, flash-pumped lasers are super high power, but not very useful for us 13-Dec-19 09:30 PM i was impressed it managed to vaporize some of that tungsten 13-Dec-19 09:30 PM well, it's light 13-Dec-19 09:30 PM expected it to be closer to a toy than actually manage that 13-Dec-19 09:30 PM the more impressive part is that it causes laser-induced air breakdown 13-Dec-19 09:30 PM that's a thing you only really see in laser labs 13-Dec-19 09:49 PM http://en.super-laser.com/products_detail/productId=35.html 13-Dec-19 09:49 PM Can you download the datasheet off of their website? 13-Dec-19 09:50 PM let's see if it loads 13-Dec-19 09:51 PM Also from the specs it looks like the laser module might come with optical isolator already. The output beam diameter of 7.5mm is also about right for the galvo. I'm trying to figure out if anything else is needed between them 13-Dec-19 09:51 PM connection timed out 13-Dec-19 09:51 PM they all come with the optical isolator 13-Dec-19 09:51 PM so the beam is round at the exit 13-Dec-19 09:51 PM but I'm wondering if you need to focus the beam before or after the galvo, or both 13-Dec-19 09:52 PM The galvo is SG7110, takes 10 mm input beam diameter 13-Dec-19 09:52 PM because f-theta lenses are meant to correct the ovality and distortion 13-Dec-19 09:52 PM but I'm guessing the marker lenses are focusing+f-theta 13-Dec-19 09:53 PM There's definetely a f-theta lens after the galvo, not sure about any optical components before it 13-Dec-19 09:53 PM that's the fuzziest bit of it 13-Dec-19 09:53 PM I managed to download the datasheet 13-Dec-19 09:54 PM Adding a red laser and a combiner for it? 13-Dec-19 09:54 PM those are built into most of them 13-Dec-19 09:54 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/superlaser-pfl-ds-A4CC6.pdf 13-Dec-19 09:54 PM here it is 13-Dec-19 09:54 PM red laser combiners are pretty much always built into the lasers because it's a lot easier to just fire the beam into something internally 13-Dec-19 09:54 PM or maybe even next to the seed input 13-Dec-19 09:57 PM Nothing in the manual about the red laser 13-Dec-19 09:59 PM not much of a manual either lol 13-Dec-19 09:59 PM anything about "guide" or "point"? 13-Dec-19 09:59 PM it should be on the DB25 output 13-Dec-19 10:00 PM Nope, pin 1-8 is power setting, pin10-15 ground, pin 16,21 alarm, pin 18 master oscillator on/off, pin 19 master on/off, pin 20 frequency adjustment, pin 23 e-stop 13-Dec-19 10:00 PM that is a very very basic laser 13-Dec-19 10:00 PM "master oscillator on/off" and "master on/off" 13-Dec-19 10:00 PM that's suspicious 13-Dec-19 10:02 PM Yeah, so it has a "booster" stage on it, the master on/off switches that apparently 13-Dec-19 10:03 PM well "master oscillator" seems very weird 13-Dec-19 10:03 PM because MOPA stands for Master Oscillator Power Amplifier 13-Dec-19 10:03 PM That's actually the main gain fiber stages I think, if I understand the wording correctly 13-Dec-19 10:04 PM the way regular pulsed fiber lasers work is that there's a low power, super precise seed laser that feeds the main fiber 13-Dec-19 10:04 PM and there's several very high power(comparatively) FAP assemblies feeding into the same fiber 13-Dec-19 10:04 PM then there's %optical voodoo%, and when you have the seed laser firing the nanosecond pulses, the %optical voodoo% makes the FAP assembly light turn into super fancy pulses 13-Dec-19 10:04 PM and all of that is capped with a q-switch lid 13-Dec-19 10:04 PM which I think is passive in these? 13-Dec-19 10:04 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/pulsed_laser_systems-88CC3.png 13-Dec-19 10:04 PM something like this 13-Dec-19 10:04 PM let me find an actual block diagram, I should have one 13-Dec-19 10:04 PM yup 13-Dec-19 10:04 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/unknown-44633.png 13-Dec-19 10:04 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/unknown-A46B5.png 13-Dec-19 10:04 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/unknown-64A37.png 13-Dec-19 10:12 PM Okay, I was a bit confused with the wording in the document, but I think the "booster" refers to the main power amplifier stage. It is not to be switched on until the "MO" signal is applied for 5ms 13-Dec-19 10:13 PM Interesting 13-Dec-19 10:13 PM Still not sure why there's an oscillator in all of this, maybe they're referring to the pulse generation circuit? 13-Dec-19 10:13 PM It's certainly not a MOPA laser, not for $620 13-Dec-19 10:14 PM Maybe it's some sort of cheap hack for driving ultrashort pulses? 13-Dec-19 10:14 PM The seed lasers are pulsed shorter than the output pulses, so <80ns high current drive pulses 13-Dec-19 10:15 PM Oh, and you need to apply the frequency signal (TTL square wave to pin 20) at least 7 ms before you switch on the main gain stage, so the MO is likely the pulse circuit driving the seed diode laser 13-Dec-19 10:15 PM I'd guess so, yeah 13-Dec-19 10:15 PM This is how MOPA lasers work 13-Dec-19 10:15 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/Schematic-diagram-of-the-master-oscillator-BB70A.png 13-Dec-19 10:15 PM better image 13-Dec-19 10:15 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/supercontinium-1024x591-E004C.png 13-Dec-19 10:15 PM it's a picosecond laser driving the amplifier 13-Dec-19 10:15 PM hence MO and PA 13-Dec-19 10:15 PM But yeah, looks like that laser just wants you to do laser sequencing yourself 13-Dec-19 10:23 PM Again, there's no parameters in this laser for you to change the pulse duty cycle from the seed laser, you can only change the pump laser diode power, so it's not MOPA. It's $2200 for a MOPA laser made by the same company 13-Dec-19 10:24 PM 2200 for mopa is actually a good price, but obviously not affordable at all 13-Dec-19 10:28 PM I was just told that they usually don't need to run anything beside a combining lens + a red laser between the fiber laser and the galvo 13-Dec-19 10:28 PM And the galvo takes the f-theta lens directly on its output 13-Dec-19 10:31 PM That sounds simple 13-Dec-19 10:31 PM I'm guessing the slightly more expensive laser costs the same as the slightly cheaper laser with the red laser and optics 13-Dec-19 10:35 PM Yep, the Raycus laser comes with the red light 13-Dec-19 10:36 PM which is $950 with the galvo stuff :( 13-Dec-19 10:36 PM no winning in this 13-Dec-19 10:41 PM I've also just been told they sell a version of the 20W laser that's not quite 20W 13-Dec-19 10:41 PM I'm listening 13-Dec-19 10:41 PM And $580 13-Dec-19 10:41 PM Is it... 19W? 13-Dec-19 10:41 PM Not much of a discount. I think it's likely just below 20W 13-Dec-19 10:42 PM There exist 15W lasers too 13-Dec-19 10:42 PM Which makes it a very bad deal 13-Dec-19 10:42 PM The 15W ones are not that much cheaper 13-Dec-19 10:42 PM So what is this "not quite 20" then? 13-Dec-19 10:43 PM $580 13-Dec-19 10:43 PM I mean the output 13-Dec-19 10:43 PM No idea of the exact output power, I was just told it's not quite up to the 20W spec 13-Dec-19 10:43 PM maybe they are seconds? 13-Dec-19 10:43 PM like not quite up to spec units 13-Dec-19 10:44 PM I'm talking to the factory here, I don't think they sell second hand stuff 13-Dec-19 10:44 PM Well, if it's maybe a watt under that is fine-ish 13-Dec-19 10:44 PM but a $40 discount seems weird 13-Dec-19 10:44 PM no i mean when they do their quality control tests they have the stuff that passes and the stuff that doesnt 13-Dec-19 10:44 PM these might be the units that dont pass the power tests or something 13-Dec-19 10:44 PM I reckon that's what it's going to be 13-Dec-19 10:45 PM https://en.wikipedia.org/wiki/Factory_second 13-Dec-19 10:45 PM just for future reference 13-Dec-19 10:45 PM Yeah that's it, they gave it an internal designation of 20L instead of 20W 13-Dec-19 10:45 PM did not expect there to actually be a wiki article for the term haha 13-Dec-19 10:45 PM 20Loser 13-Dec-19 10:45 PM Does the $580 laser have a red pointer? 13-Dec-19 10:47 PM Nope, but the lens that block all red light and passes all 1064nm light is like $5 13-Dec-19 10:47 PM If it's $585 that's a no-brainer really 13-Dec-19 10:47 PM $580, +$5 for the laser, +$200 for the galvo, +$65 for a 200x200 lens 13-Dec-19 10:47 PM $850 without shipping 13-Dec-19 10:48 PM Yep, that's the chepest option, plus like $30 for the ezCAD card? 13-Dec-19 10:48 PM Oh, that's not even included 13-Dec-19 10:48 PM You're WAY undershooting 13-Dec-19 10:48 PM Those cards are ridiculously expensive 13-Dec-19 10:49 PM Oh my 13-Dec-19 10:49 PM Why? 13-Dec-19 10:49 PM I wish I knew 13-Dec-19 10:49 PM You can easily find them for $300 13-Dec-19 10:49 PM They sell it for $130 13-Dec-19 10:50 PM USB or PCIe? 13-Dec-19 10:50 PM for serious experiments you'd want PCIe 13-Dec-19 10:50 PM USB 13-Dec-19 10:50 PM Yeah, that's the most barebones unit 13-Dec-19 10:50 PM In theory you can build your own, they're not that complicated 13-Dec-19 10:50 PM The galvo heads accept a few power signals and the galvo deflection is just a differential analog voltage 13-Dec-19 10:51 PM I bet there are pirated versions out there, this is too simple not to be made on the cheap 13-Dec-19 10:52 PM They're actually quite high performance, FPGAs on most of them 13-Dec-19 10:52 PM I think $130 is the clone price 13-Dec-19 10:52 PM I wonder if you can replace them with an analog output mesa card 13-Dec-19 10:52 PM Not much cheaper 13-Dec-19 10:52 PM this 13-Dec-19 10:52 PM http://store.mesanet.com/index.php?route=product/product&path=83_85&product_id=58&sort=p.price&order=ASC 13-Dec-19 10:52 PM with this 13-Dec-19 10:52 PM http://store.mesanet.com/index.php?route=product/product&product_id=92 13-Dec-19 10:52 PM yeah, $130 is the clone price 13-Dec-19 10:52 PM https://www.aliexpress.com/item/4000048347687.html 13-Dec-19 10:52 PM there's no way in hell they use an ASIC like it's marked(laser marked ) on the PCB 13-Dec-19 11:01 PM Yep, looks identical to the $130 card. It comes with the EZCad software as well 13-Dec-19 11:02 PM that stuff also costs way too much but thankfully pirated 13-Dec-19 11:03 PM https://www.scaps.com/index.php?id=24 13-Dec-19 11:03 PM This card is slightly less expensive, $100 13-Dec-19 11:04 PM Clone, or the original German one? 13-Dec-19 11:04 PM It's worth around $100 with all the parts, but yeah, not a very cheap option 13-Dec-19 11:04 PM That brings the kit price... right back up to $950 13-Dec-19 11:04 PM Except this time excluding shipping 13-Dec-19 11:07 PM Yeah, but I think we're pretty much at the limit here, anything else that's needed? I guess someway to move the galvo to focus it but that's easy/cheap enough 13-Dec-19 11:07 PM Far easier to DIY that bit 13-Dec-19 11:07 PM Bolt a linear rail to a bit of scraped square tube 13-Dec-19 11:07 PM But I don't get how we're getting this price at all 13-Dec-19 11:07 PM The only missing thing is the actual mechanical bit and a 24V power supply 13-Dec-19 11:07 PM Which brings the total to around $1200 if bought purpose-made 13-Dec-19 11:07 PM ... which is how much complete galvo markers sell for. 13-Dec-19 11:07 PM Are they making any money? 13-Dec-19 11:10 PM These things are sold in massive volumes, and for a complete 20W system the cheapest price I can find is around $1900 new 13-Dec-19 11:10 PM I've seen them go for around $1200ish 13-Dec-19 11:10 PM Most are $1900, but that usually includes free shipping 13-Dec-19 11:12 PM Are you sure the $1200 are 20W? Did you see them on Aliexpress? 13-Dec-19 11:12 PM I can't find any right now, but I definitely saw some 13-Dec-19 11:12 PM Right now the 1200 ones are 10 and 15 13-Dec-19 11:12 PM If the full kit was under $900 including shipping, I'd definitely buy one 13-Dec-19 11:17 PM I can look for some cheaper galvos for you, cheapest new ones I can find are $150 13-Dec-19 11:18 PM not many on eBay right now 13-Dec-19 11:18 PM for a low price anyway 13-Dec-19 11:24 PM $585 for laser, $150 for galvo, $100 for control card, $50 for lens, $65 for shipping. You're looking at $950 with shipping here 13-Dec-19 11:24 PM hmmmm 13-Dec-19 11:24 PM wonder if customs would let it through... 13-Dec-19 11:24 PM it's not $65 for shipping the whole kit, is it? 13-Dec-19 11:25 PM I mean all the other stuff is super light, I'd guess it'll be under 10 kg. 13-Dec-19 11:26 PM can they fudge numbers? 13-Dec-19 11:26 PM the MFP-20F is 5kg, 244x200x73 13-Dec-19 11:26 PM if that's the one 13-Dec-19 11:27 PM Hmm, yeah, might even be quite a bit lighter, but we're talking about a $15-20 difference here 13-Dec-19 11:28 PM are they... flexible.... on declarations? 13-Dec-19 11:28 PM My parents will be actually shipping this to you lol 13-Dec-19 11:28 PM oh lol 13-Dec-19 11:28 PM Whatever you want to put on the declaration really, you know your customs best 13-Dec-19 11:29 PM gaaaaah, I want a laser, okay 13-Dec-19 11:29 PM on that note... want a thermal camera? 13-Dec-19 11:29 PM I want a laser too 13-Dec-19 11:29 PM If you are getting one I might get one for myself if I have $950 of disposible income in the next couple of months 13-Dec-19 11:29 PM But I have too much stuff and not enough $$ for a trade right now 13-Dec-19 11:30 PM My $950 is very not disposable but my desire for a laser is borderline stronger than the disposability of said cash 13-Dec-19 11:30 PM Maybe I should do this... 13-Dec-19 11:30 PM (take a look in #swap-meet) 13-Dec-19 11:37 PM Hmm, I'm really interested to see how these laser would perform on milling aluminum or stainless steel 13-Dec-19 11:38 PM I'm going to do exactly that 13-Dec-19 11:38 PM I wonder if I could retrofit my existing k40 co2 laser gantry/stage, just for starting out 13-Dec-19 11:38 PM Nope 13-Dec-19 11:38 PM It's just a fiber 13-Dec-19 11:38 PM Why not? 13-Dec-19 11:38 PM And a lens 13-Dec-19 11:38 PM Because you need to scan an area to actually do milling 13-Dec-19 11:38 PM And you need to scan fast 13-Dec-19 11:39 PM Well only if you want decent throughput 13-Dec-19 11:39 PM Right? 13-Dec-19 11:39 PM My stage can scan around 13-Dec-19 11:39 PM Not really, they work in a really weird way 13-Dec-19 11:39 PM Or the head rather 13-Dec-19 11:39 PM The pulses will bury straight into the material 13-Dec-19 11:39 PM Remember that your focal spot is in the micron scale 13-Dec-19 11:39 PM Ok, so they need to move within a single pulse? 13-Dec-19 11:39 PM Continuous motion, so sort of 13-Dec-19 11:39 PM You need at least one oscillating scanner, you could probably bolt that onto your gantry 13-Dec-19 11:41 PM Hmm, seems like it would limit your effective resolution to whatever the pulse time was for the given stage linear speed was 13-Dec-19 11:41 PM If you wanted fine Z control anyway 13-Dec-19 11:41 PM Each pulse is very low power 13-Dec-19 11:41 PM (<2mJ for all of the lasers discussed) 13-Dec-19 11:41 PM Ok, so why can't you pulse it non moving? 13-Dec-19 11:42 PM https://www.youtube.com/watch?v=g-Q4BdiDZCM 13-Dec-19 11:42 PM It will mill too deep? 13-Dec-19 11:42 PM skip to 0:21 13-Dec-19 11:42 PM it will bury into the material and start mincing all the dust inside 13-Dec-19 11:42 PM or just make a conical hole 13-Dec-19 11:42 PM as it slowly defocuses 13-Dec-19 11:42 PM the noise you hear in that video is from the scanner, not from the laser pulsing 13-Dec-19 11:42 PM that's the hissing 13-Dec-19 11:43 PM So if you want less of a cone, you're simply burning morr lateral area then 13-Dec-19 11:43 PM Meaning it limits your lateral resolution 13-Dec-19 11:44 PM Well, when I get the laser I'll definitely try just pointing it at a stationary target with no scanning 13-Dec-19 11:44 PM But I think it's really not possible to get any proper results out of that 14-Dec-19 05:35 PM yall makin me think we need a lazor channel 14-Dec-19 05:36 PM Well if there is enough interest 14-Dec-19 05:36 PM It could be arranged 14-Dec-19 05:37 PM Yea, or it may be-able to be introduced into another channel 14-Dec-19 05:37 PM maybe HV and Lazors? 14-Dec-19 05:37 PM Since HV on its own is probably slightly low traffic 14-Dec-19 05:37 PM Yeah hv has been pretty quite 14-Dec-19 05:37 PM Its going to be so great traveling today 14-Dec-19 05:37 PM take off at 6pm from Korea... land in Newark at 9:30pm... 14-Dec-19 05:37 PM LOVE TIMEZONES 14-Dec-19 05:39 PM Ok so i need a good laser emoji 14-Dec-19 05:44 PM yup 14-Dec-19 06:04 PM @Deleted User dunno how you found your way to the styropyro discord, but is your head exploding yet with the kiddos? 14-Dec-19 06:04 PM oh yes 14-Dec-19 06:04 PM most definitely 14-Dec-19 06:04 PM Hehe 14-Dec-19 06:04 PM Tbh a channel with electronics hobbyists at the start of their journey is refreshing. As most other medias where I encounter them they are in the industry or at collage. 14-Dec-19 06:07 PM Industry or college level people seem to fall into two categories 14-Dec-19 06:07 PM People that know what they're doing, or total muppets who have put zero effort into learning a "money making" skill 14-Dec-19 06:07 PM Sadly I see a lot of the latter in forums and chats, the former bunch seems to keep to themselves 14-Dec-19 06:10 PM Maybe they have encountered enough muppets :P 14-Dec-19 06:36 PM @Conmega judging by the traffic good idea on the laser channel 15-Dec-19 01:59 PM @Deleted User And now you know I have the laser channel over at styros discord on mute. 15-Dec-19 02:15 PM lol yeah 15-Dec-19 05:20 PM I got into the server just because people here seemed appalled ;) 15-Dec-19 11:28 PM whew, finally figured out how to convert all these wikipedia article HTML files into 1-bit depth B&W BMP files, with the images dithered for greyscale simulation 15-Dec-19 11:28 PM now to assemble them into a huge GDSII file and ship it to Heidelberg instruments to see if their software pipeline chokes while trying to write via their direct-write laser lithography tools 16-Dec-19 12:16 AM 59 gigapixels, I hope my computer doesn't choke 16-Dec-19 09:38 AM https://twitter.com/LambdaConcept/status/1206610968819748864 16-Dec-19 09:38 AM I love these M.2 FPGA boards that are coming about 16-Dec-19 09:38 AM I've always hated the PCIe dev boards for FPGAs with like litterally everything and the kitchen sink on it and you need like 1% of it 16-Dec-19 09:39 AM And you pay dearly for the 99% you don't need 16-Dec-19 09:39 AM yeaaa... 16-Dec-19 09:39 AM like the 20 dollar 2 line LCD display you probably pay 60 dollars for lol 16-Dec-19 11:10 AM "only $300" for an Artix 7 with 3.5 components on it 16-Dec-19 11:10 AM not cool 16-Dec-19 11:10 AM hell, they said the original board was expensive and they wanted to find a cheaper way 16-Dec-19 11:23 AM Well, this is targetting niche applications, and likely expected low volumes of sales (my guess)... Hackers gotta recoop their engineering costs too! I'm ok with such pricing, I just hope they open sourced the design and software/firmware 16-Dec-19 11:23 AM The first version, slot screamer, was all open as I recall 16-Dec-19 11:23 AM But that didn't use an FPGA 16-Dec-19 11:25 AM slotscreamer is a more hacker-style tool 16-Dec-19 11:25 AM Made with parts that aren't supposed to do what they were doing :P 17-Dec-19 08:11 AM enough for today! 17-Dec-19 08:11 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/EL__pzzWkAAbqHA-B0D84.png 17-Dec-19 08:11 AM 8x32 led display 17-Dec-19 03:25 PM @nmz787 a bit off topic, is Reps' discord for patreon supporters only? 17-Dec-19 03:26 PM I want to join too, looks like $1 a month? 17-Dec-19 03:26 PM Don't know what reps is 17-Dec-19 03:26 PM Marco Reps 17-Dec-19 03:26 PM I've only heard of him, never watched his videos 17-Dec-19 03:26 PM They seemed a bit off topic for my interests 17-Dec-19 03:26 PM oh, must have pinged the wrong person 17-Dec-19 03:26 PM I only skimmed the #show-and-tell chat 17-Dec-19 03:26 PM @GigaSquirrel ? 17-Dec-19 05:39 PM hrm, my M.2 slot is being used as my OS drive 17-Dec-19 05:39 PM oh, I have a M.2 drive laying around here.. a SATA one, whereas my motherboard was PCIe .. anyone have M.2 SATA and want a drive? like 128gb? 17-Dec-19 05:39 PM it's like 4 years old at this point, but never used 17-Dec-19 05:50 PM my slightly-scummy suggestion would be to hang onto it, since it's a nearly-dead format and is only gonna get more expensive with time 17-Dec-19 05:50 PM so many weird little form factors that need it 17-Dec-19 05:50 PM (assuming, of course, nobody here actually wants/needs it) 17-Dec-19 05:50 PM oh wait, M.2 SATA; i was thinking MSATA 17-Dec-19 05:50 PM not sure if that's different 17-Dec-19 05:51 PM I also have a large heatsink/fan that did not fit the motherboard properly 17-Dec-19 05:51 PM hard drives are dumb 17-Dec-19 05:51 PM it is flippin retarded that there are two different interfaces for M.2 17-Dec-19 05:51 PM like.. I get it, it's just a connector... but ughhfffffff 17-Dec-19 06:54 PM I've actually seen more DIY type of projects that simply use things like PCI and ISA connectors because they are proven, obtainable and relatively cheap since half the connectors are etched on the PCB (that last statement may depend slightly, but the concept is there) 17-Dec-19 06:54 PM no need for a computer to use a connector 17-Dec-19 08:09 PM @devoopes did you use to watch my old channel then? 17-Dec-19 08:09 PM It's been a while since I have posted anything... 17-Dec-19 08:11 PM Probably that’s the one. 18-Dec-19 11:39 AM My firstly firdt vacuum chamber (more like degassing setup): 18-Dec-19 11:39 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20191218_181849-98372.jpg 18-Dec-19 11:44 AM finally someone with a good XHV setup 18-Dec-19 12:18 PM @qualia Yeah one of my random laptops has microSATA on it, which means it has a microSATA to MSATA adapter on it. So double the obscurity. 18-Dec-19 12:44 PM well, you wont ever be saying: I need to get a sight glass window 18-Dec-19 01:44 PM Ugh, i really don't want to be doing day job stuff anymore that isn't immediately vacuum or nanotech 18-Dec-19 05:42 PM SAME 18-Dec-19 05:42 PM though my day job involves none of this 18-Dec-19 08:06 PM I highly recommend it hands on with stuff is addicting 19-Dec-19 01:56 AM So I finally classified a ton of chips I had got from work a long time ago, anyone needs anything for old timey repairs? 19-Dec-19 01:56 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/EMJBP-KWoAEt4kp-96C69.png 19-Dec-19 01:56 AM @AdamMcCombs 19-Dec-19 05:41 AM Yee, led display! 19-Dec-19 05:41 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/EMJtbpRWwAE5Mxm-6FDA4.png 19-Dec-19 05:41 AM (140x40mm, ed area 130x30, 256 leds in 8x32) 13€ per 5 boards shipped, in black finish. 19-Dec-19 12:00 PM I cant figure out the actual output provided by many 3 axis magnetometers.. example https://www.mouser.com/datasheet/2/389/iis2mdc-1309412.pdf 19-Dec-19 12:00 PM what I want is to detect some rotation (which a magnet could be mounted on it, I guess) 19-Dec-19 12:00 PM just a non contact rotary knob.. maybe an optical versionwould be better, but I like how small the magnetic ones can get, as this is supposed to go into tiny watchmaker's screwrivers (to measure torque) 19-Dec-19 12:00 PM there's a few others which show graphics of a N/S round magnet rotating over the IC.. but it's only a graphic and no real additional info 19-Dec-19 12:00 PM anyone look into these sorts of things? I would kind think contactless is used a bit inside of vacuum chambers? 19-Dec-19 12:00 PM meh, lets go to mfgr website for more info I guess.. datasheets obv dont tell you everything 19-Dec-19 12:16 PM oh, okay, simply X/Y in a latch type of detection.. it simply wasnt spelled out in hte datasheet 19-Dec-19 12:25 PM @Noxz do you just want a non contact rotary knob? 19-Dec-19 12:25 PM yes and no 19-Dec-19 12:25 PM AS5600 19-Dec-19 12:26 PM as I states, I want to make a tiny torque screwdriver for watchmaking.. and I already have the flexure designed and so forth, I just need a way to detect the rotation (I dont want to deal with strain gauges, though that could be an option if I dont want anything that resembles a magnet anywhere near the watch) 19-Dec-19 12:26 PM AS5600. 19-Dec-19 12:26 PM that's a magnetic encoder 19-Dec-19 12:26 PM works with any tiny diametrically magnetized magnet 19-Dec-19 12:26 PM ~3-8mm away 19-Dec-19 12:26 PM 12 bit absolute resolution 19-Dec-19 12:27 PM I have ams, ST, and Malexis brands opened up already 19-Dec-19 12:27 PM the 5600 is double the price or so of the other simple ones.. but we're talking like $1.80 vs ~$3.50 .. hard to actually say such a thing unless I want to make a million of them 19-Dec-19 12:27 PM have you used the 5600 before? 19-Dec-19 12:27 PM oh, also size matters, I can get the cheaper ones in as small as 2x2x0.7mm which would fit nicely in a tiny screwdriver 19-Dec-19 12:27 PM looks like QFN for the 5600 variant has a price jump to over $5/ea 19-Dec-19 12:27 PM I'll look into it more, but yeah, just a little side project that I've been dabbling with 19-Dec-19 12:31 PM I'm using the AS5600 right now 19-Dec-19 12:31 PM the plan is to use a BLE chip (of which I have a devkit for, and some ocmplete chip solutions, ie, including an antenna) 19-Dec-19 12:31 PM for the AC servo drive 19-Dec-19 12:31 PM oh yeah? 19-Dec-19 12:31 PM ahh 19-Dec-19 12:32 PM yep 19-Dec-19 12:32 PM very nice to talk to 19-Dec-19 12:32 PM has internal filtering and hysteresis if you want it 19-Dec-19 12:32 PM seems like all of them offer I2C and SPI 19-Dec-19 12:32 PM talking to it via i2c 19-Dec-19 12:32 PM at a few khz 19-Dec-19 12:32 PM I've yet to use i2c, only SPI 19-Dec-19 12:32 PM i2c is simpler 19-Dec-19 12:32 PM ish 19-Dec-19 12:32 PM I can imagine 19-Dec-19 12:32 PM seems nearly the same though 19-Dec-19 12:32 PM there's libraries for the 5600 for pretty much any platform 19-Dec-19 12:33 PM ah, that could make it easier 19-Dec-19 12:33 PM but yeah, package size is of concern to me 19-Dec-19 12:33 PM which would be the main deal breaker I think 19-Dec-19 12:33 PM I have no problem configuring registers w/o a library 19-Dec-19 12:33 PM are you sure a flexure will detect this? 19-Dec-19 12:33 PM for tiny watch screws I don't think you want more than a few hundred mNm 19-Dec-19 12:33 PM your only real option might be to glue a strain gauge to it 19-Dec-19 12:34 PM we have a mechanical torque screwdriver that we sort of calibrate ourselves with, and yeah, I htink the max it goes up to is like 50mNm 19-Dec-19 12:34 PM "flexure" isnt exactly it 19-Dec-19 12:34 PM of what I am doing 19-Dec-19 12:34 PM more so exploiting beam deflection angle 19-Dec-19 12:34 PM which, if you attach a solid beam to the end of a cantilevered one, and apply force at that end, the solid beam will rotate around 2/3 L.. kind of a neat trick to get pure rotation from a beam 19-Dec-19 12:34 PM there's a few papers on it, but mostly from the MIT professor of precision machine design that I've been looking into 19-Dec-19 12:34 PM he had some friends at polaroid that used it for lense rotation 19-Dec-19 12:34 PM and actually.. since these products can also sense in the Z direction (such a central push button on a rotary knob).. I may want to look into sensing how much downard pressure as well.. hrmm 19-Dec-19 12:34 PM I've commonly applied too much pressure and scruffed things up, raised burs, etc 19-Dec-19 12:34 PM Example of beam deflection yielding a purely rotational output on second beam 19-Dec-19 12:34 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/canti-5DADE.jpg 19-Dec-19 12:34 PM that image is missing some things to spell out the 2/3 L location, but that's the idea 19-Dec-19 12:34 PM the screwdriver bit would be the fixed 'wall'/end of the beam, and the body would be connected to the "free" end, with a central magnet + sensor... I was thinking about air/parallel plate capacitors and then measuring the capacitance, but that was starting to make the project slightly large.... but I like that idea because no magnets near watches, please 19-Dec-19 12:34 PM this mechanism may be super useful for focusing beams of anything 19-Dec-19 12:34 PM likely better for standard optics though 19-Dec-19 12:44 PM A strain gauge should work for you 19-Dec-19 12:44 PM oh, yeah, there's that too.. but the point of this project is to exploit that property 19-Dec-19 12:44 PM hmmm 19-Dec-19 12:44 PM for more than just pivoting about an axis 19-Dec-19 12:44 PM but for reading data of that 19-Dec-19 12:44 PM strain gauges is kinda what every bigger torque wrench uses, and I want to get away from that 19-Dec-19 12:44 PM not that it isnt proven, but I'd like to try this concept 19-Dec-19 12:45 PM well, I'm not sure you'll get the resolution you want in 12 bits 19-Dec-19 12:46 PM all depends on the beam and how much it iwll deflect 19-Dec-19 12:46 PM I'll look into it more though, just wasnt sure how the stuff actually worked 19-Dec-19 12:46 PM initially, I watched a few videos and now know a bit more 19-Dec-19 12:46 PM datasheets suck in comparison to the other material on the parts, heh 19-Dec-19 12:49 PM well, they're magnetic encoders 19-Dec-19 12:49 PM you put a magnet on top of it 19-Dec-19 12:49 PM and it tells you where it is, 0-4096 19-Dec-19 12:52 PM that should be plenty of resolution 19-Dec-19 12:52 PM only way is to try 19-Dec-19 12:52 PM right, sparkfun has a breakout of one of the chips I am thinking about 19-Dec-19 12:52 PM https://www.sparkfun.com/products/14571 19-Dec-19 12:52 PM I'd avoid magnetometers 19-Dec-19 12:52 PM they're not very accurate 19-Dec-19 12:53 PM is the chip not very accurate, or the magnet you chose? 19-Dec-19 12:53 PM I read the variances in magnet to magnet is bad 19-Dec-19 12:53 PM the magnetometer isn't made for external axis work afaik 19-Dec-19 12:54 PM I am going on-axis 19-Dec-19 12:54 PM but, the 393 can do off-axis as well 19-Dec-19 12:54 PM says Malexis' selection guide 19-Dec-19 12:55 PM well, try it 19-Dec-19 12:55 PM no harm done if it fials 19-Dec-19 12:55 PM buy a breakout, twiddle a magnet over it, see what bits you get out 19-Dec-19 12:55 PM yeah, again, I kinda spoke a little too soon before looking for additional info, but nice to hear you are using one such thing 19-Dec-19 02:32 PM apparently hunting down tiny diametrically opposed disc magnets is harder than I thought! found some about 6mm diameter, but getting smaller I think would be better 19-Dec-19 02:37 PM You don't want very small magnets 19-Dec-19 02:38 PM well, the item it goes in is limited by size 19-Dec-19 02:38 PM I'd prefer it to be less than 10mm diameter, and that is total product size, per product info, they had good success with some 6mm ones, which could work, but if I can get smaller, then yay.. because some screwdrivers on the bigger end are only 5mm at the knurls 19-Dec-19 02:38 PM no need to beef down on tiny watch screws 19-Dec-19 02:39 PM you can extend the shaft 19-Dec-19 02:40 PM I have thought of that as well 19-Dec-19 02:40 PM still, it seems like designing around something that should be available 19-Dec-19 02:40 PM could turn a magnet smaller, I suppose... why not 19-Dec-19 02:40 PM or grind it, whichever 19-Dec-19 02:40 PM but yes, I am aware resolution/whatever diminishes with size 19-Dec-19 02:41 PM also placement accuracy 19-Dec-19 02:41 PM more so, the point they were making was off-axis is worse with smaller 19-Dec-19 02:41 PM right 19-Dec-19 02:41 PM but, if I am on axis pretty good, then that shouldn't matter much 19-Dec-19 02:42 PM I bought from first4magnets 19-Dec-19 02:42 PM https://www.first4magnets.com/cylindrical-rod-c39/3mm-dia-x-12mm-thick-diametrically-magnetised-n42-neodymium-magnet-p3666#ps_1-2760 19-Dec-19 02:42 PM maybe you can cut this one into disks 19-Dec-19 02:42 PM yeah, they've been coming up on my search results 19-Dec-19 02:42 PM 3mm is certainly decent size I think 19-Dec-19 02:42 PM also, I coudl easily get away from neo magnets, no need for that strength 19-Dec-19 02:48 PM best to have a very strong magnet 19-Dec-19 02:48 PM for very low noise readout 19-Dec-19 02:49 PM that part makes sense.. jsut magnets around watches are a no-no 19-Dec-19 02:49 PM possibly whatever material I use for the screwdriver base/handle itself may block enough.. was thinking some stainless before that requirement 19-Dec-19 02:49 PM 304/316 19-Dec-19 02:51 PM some mu metal would be an interesting addition 19-Dec-19 02:51 PM lol 19-Dec-19 02:51 PM over engineered 19-Dec-19 02:56 PM when has that ever stopped anyone? 19-Dec-19 02:56 PM In fact I believe in this server that's encouraged! ;) 19-Dec-19 03:03 PM heh.. also, just looked up the BLE modules I have on hand (and will likely use more of) and they are 7.0x7.4mm .. so I will need one large part.. but I can do a small ribbon cable or similar to down by the magnetic sensor, so the measurement is taken as close to the action, but yeah, still rough design phase... 19-Dec-19 03:03 PM k, time for a rainy dog walk 19-Dec-19 03:03 PM dunno how small coin cell batteries can get.... and I should know th is 19-Dec-19 03:03 PM anywho, yeahh 19-Dec-19 03:13 PM but why do you want a BLE screwdriver 19-Dec-19 03:23 PM cool user interface for setting torquelimits? 19-Dec-19 03:32 PM tablet/phone (hence why BLE) 19-Dec-19 03:32 PM so, I also want a BLE LED indicator inside the loupe 19-Dec-19 03:32 PM so I can be zoomed into the screw and see when I hit the torque limit 19-Dec-19 03:32 PM also.. I found a casio watch in the rain! 19-Dec-19 03:32 PM Casio F-91W 19-Dec-19 03:32 PM keeping good time, too 19-Dec-19 03:32 PM the one torque screwdriver we have at school is just for checking, ie, tighten to what we think, then untighten with that screwdriver and read the value as you are doing it (because once it cracks loose then obv there is no torque on it anymore).. but it is very big and bulky 19-Dec-19 03:32 PM the alternative torque screwdrivers I think are like any standard torque ones, adjustable via turning and the inner spring buckling.. and they have those for watchmaking, but they are kinda bulky and whatnot.. plus, the action of slipping is terrible 19-Dec-19 03:32 PM or clicking 19-Dec-19 03:32 PM if you are on the micro level 19-Dec-19 03:32 PM you really dont want any feedback like that 19-Dec-19 03:32 PM visual would be better, like common electronic torque drivers that have lights (and/or vibrators, but,a s I said, tactile feedback may not be good) 19-Dec-19 03:32 PM audible could be considered if through headphones or if alone, but not in the classroom any other way 19-Dec-19 03:32 PM but yeah, comes down to: how do you get feedback on torque if you are looking through a loupe? 19-Dec-19 03:38 PM what if you just motorize it 19-Dec-19 03:38 PM and BLE was one of the simplest ways I could figure 19-Dec-19 03:38 PM a few hundred mNm is easily doable with a tiny geared motor 19-Dec-19 03:38 PM you mount the motor and bit driver on the strain gauge 19-Dec-19 03:38 PM and a tiny button for "go" 19-Dec-19 03:38 PM that may be the later versions 19-Dec-19 03:38 PM so it will tighten until the perfect torque 19-Dec-19 03:38 PM for further automation 19-Dec-19 03:38 PM and then beep using the motor 19-Dec-19 03:38 PM also, I want to look into retaining clips over screws 19-Dec-19 03:38 PM screws suck, honestly 19-Dec-19 03:39 PM grubs 19-Dec-19 03:40 PM but, in the mean time... there is this project 19-Dec-19 03:40 PM well you can just put a tiny smd bleeper in 19-Dec-19 03:40 PM it should be a decent machinig exercise, some electronics (albeit minimal), android, etc 19-Dec-19 03:40 PM they are tiny and LOUD 19-Dec-19 03:40 PM well, then I would need to tell the screwdriver what torque I want 19-Dec-19 03:40 PM if all that interfacing is done on the tablet, it makes it "easier" 19-Dec-19 03:40 PM put in a tiny display and a couple buttons 19-Dec-19 03:41 PM but then again - it cant be annoying to other students 19-Dec-19 03:41 PM that'd be smaller than a ble module 19-Dec-19 03:41 PM which is why headphones works 19-Dec-19 03:41 PM then I dont need to worry about a screen why th ephone has one 19-Dec-19 03:41 PM headphone feedback for screwdrivers 19-Dec-19 03:41 PM ew 19-Dec-19 03:41 PM over engineered 19-Dec-19 03:41 PM that's just wrong 19-Dec-19 03:41 PM it's not a car repair shop 19-Dec-19 03:41 PM still wrong 19-Dec-19 03:41 PM loud noises dont typically happen 19-Dec-19 03:41 PM lol 19-Dec-19 03:42 PM needing HEADPHONES 19-Dec-19 03:42 PM to use a SCREWDRIVER 19-Dec-19 03:42 PM also, apparnetly this casio I found is the same kind bin laden etc used in explosives? 19-Dec-19 03:42 PM who knows 19-Dec-19 03:42 PM like I said, I had the other idea of a LED mounted onto another BLE device on the loupe, to visualize when you hit torque while looking where you need to 19-Dec-19 03:42 PM and BLE has the advantage that you can be conencted to many devices at once 19-Dec-19 03:44 PM connections seem a bit silly 19-Dec-19 03:44 PM build it in 19-Dec-19 03:44 PM maybe a series of LEDs on the board and small hole cutouts with an engraved list of torques 19-Dec-19 03:44 PM https://en.wikipedia.org/wiki/Casio_F-91W#Usage_in_terrorism 19-Dec-19 03:44 PM PWM for the LEDs to switch between torques 19-Dec-19 03:44 PM for in-between values 19-Dec-19 03:44 PM so an array of leds would be 10, 50, 100, 150, 200, 250, 400, 500 19-Dec-19 03:44 PM 50% PWM between 10 and 50 to get 25 19-Dec-19 03:44 PM simplicity is key 19-Dec-19 03:45 PM that sounds pretty difficult to me 19-Dec-19 03:45 PM very easy 19-Dec-19 03:45 PM anywho, trying to see the LED is the issue 19-Dec-19 03:45 PM how often do you need to see the LED? 19-Dec-19 03:45 PM does it shine down? becaus eyou can really be zoomed in 19-Dec-19 03:46 PM the answer is only when you're SETTING the torque 19-Dec-19 03:46 PM right, so as you tighten every screw 19-Dec-19 03:46 PM as for indication, you can have both a green facing downward LED and an internal bleeper 19-Dec-19 03:46 PM but, again, then you need to move an interface onto t he screwdriver 19-Dec-19 03:46 PM so you set the required torque on the screwdriver, and when you reach it by screwing something in, it bleeps 19-Dec-19 03:46 PM which I dont particularly like 19-Dec-19 03:46 PM it's the most elegant and simple solution 19-Dec-19 03:46 PM it's a reader 19-Dec-19 03:46 PM I think that is of opinion 19-Dec-19 03:47 PM that doesn't require tHeINTnerNetOfThInGS 19-Dec-19 03:47 PM no interweb needed 19-Dec-19 03:47 PM it's very close 19-Dec-19 03:47 PM turn wifi off 19-Dec-19 03:47 PM and a bad idea 19-Dec-19 03:47 PM lol, everything is better with bluetooth 19-Dec-19 03:47 PM do not put wireless connectivity into something you do not need 19-Dec-19 03:47 PM you can have a small dock you sit the screwdriver into 19-Dec-19 03:47 PM https://www.youtube.com/watch?v=0KXoBcQER_0 19-Dec-19 03:47 PM with pogo pins 19-Dec-19 03:47 PM and to make it not require alignment, you make the connections in the form of three rings 19-Dec-19 03:48 PM oh, I thought of that as well 19-Dec-19 03:48 PM with a small OLED display on the dock 19-Dec-19 03:48 PM and a simple UI 19-Dec-19 03:48 PM could probably get away with just like... four buttons or something 19-Dec-19 03:48 PM since you only need a tiny number of functions 19-Dec-19 03:49 PM btw, you need to watch that clip/episode 19-Dec-19 03:51 PM I have an idea of how to design the electronics for this 19-Dec-19 03:51 PM fit into... say, a 15mm diameter? 19-Dec-19 03:52 PM under 10 19-Dec-19 03:52 PM under 10 would be hard 19-Dec-19 03:52 PM even for me 19-Dec-19 03:52 PM I have a few ideas but it'd be... finding batteries for this would be hard 19-Dec-19 03:52 PM 13mm is the current buckling/slip type 19-Dec-19 03:53 PM how long can it be? 19-Dec-19 03:53 PM 110mm without the tip 19-Dec-19 03:53 PM plenty of length 19-Dec-19 03:54 PM tight constraints 19-Dec-19 03:54 PM which is one reason I dmismissed the 5600 in favor of a smaller IC 19-Dec-19 03:54 PM there's an issue of price 19-Dec-19 03:55 PM also, coudl revert to the "orginal" idea of parallel plate capacitor and measuring capacitance over magnetometer 19-Dec-19 03:55 PM price... R&D let's say sub $150.. with an end goal of being able to make a dozen for say $100 after that? 19-Dec-19 03:56 PM maybe 19-Dec-19 03:56 PM maybe a little more.. but yeah, about that 19-Dec-19 03:56 PM that's the manufacture price though 19-Dec-19 03:56 PM I'm not exactly marketting it 19-Dec-19 03:56 PM it's more of a personal tool 19-Dec-19 03:56 PM if others say: I WANT IT... I may have a hard time coming up with a price 19-Dec-19 03:56 PM especially if I opensource/hardware it all 19-Dec-19 03:57 PM could go with iC-TW11 19-Dec-19 03:57 PM ~$6 for a 4x4 QFN 19-Dec-19 03:57 PM I am currently looking at MLX90393 19-Dec-19 03:57 PM which is also a 16 QFN 19-Dec-19 03:57 PM and sub $2 19-Dec-19 03:58 PM do you want to do all the math to compensate for cheap tiny magnetic fields? 19-Dec-19 03:58 PM I don't 19-Dec-19 04:00 PM given the small other torque screwdriver, I could get it close enough, I feel 19-Dec-19 04:00 PM of simple comparison/ etc 19-Dec-19 04:00 PM it's likely going to be miles better than anything else 19-Dec-19 04:01 PM I could try designing the electronics that would fit in an ~8mm space 19-Dec-19 04:01 PM Can you design the hardware? 19-Dec-19 04:01 PM The output of your hardware needs to be a reference cylinder for holding all the electronics, with a place to put a flat perpendicular circular PCB with the sensor facing upwards 19-Dec-19 04:01 PM or if it's a lever, sideways 19-Dec-19 04:02 PM heh, I kinda want to do all the design myself 19-Dec-19 04:02 PM I appreciate the desire to help to some degree 19-Dec-19 04:02 PM this will need quite a few serious design considerations and tricks 19-Dec-19 04:03 PM yeah, it's mostly just on notebook paper right now, just a step up from napkin doodles 19-Dec-19 04:03 PM draw up a 3d model of the hardware that converts torque into rotary motion 19-Dec-19 04:04 PM I have some rough models for it, but mostly 2d (albeit in a 3d program) 19-Dec-19 04:04 PM but yeah.... it will all need some work 19-Dec-19 04:04 PM if you can describe what it's going to do, I can suggest how to sense it 19-Dec-19 04:04 PM but in short, you need either a linear-ish deflection of the magnet by a few mm, or an axial rotation of 10-30 degrees for good resolution 19-Dec-19 04:05 PM yeah, the rotation is what I was looking at, and certainly no more than 90 deg 19-Dec-19 04:06 PM the larger the output, the better it is 19-Dec-19 04:06 PM and decent detection of ther ~10mNm up to just over 50 19-Dec-19 04:06 PM which is all part of the design of the cantilever 19-Dec-19 04:06 PM anywho, yeah, thanks for chatting on it and such.. I was not trying to defend a position as much as elaborate on certain desires 19-Dec-19 04:07 PM you want the largest deviation possible 19-Dec-19 04:07 PM for best resolution 19-Dec-19 04:07 PM for rotary, you may want some sort of cam or additional lever 19-Dec-19 04:07 PM for sensing the angle you can go with something like the AS5050A 19-Dec-19 04:08 PM but, I also dont want a "spring" woulnd up a full turn inside the screwdriver that has to unwind when you are done torquing 19-Dec-19 04:08 PM well yeah, you want to massively amplify a tiny deflection 19-Dec-19 04:08 PM but the innards don't have to do any work 19-Dec-19 04:08 PM since it's all magnetic 19-Dec-19 04:08 PM I'd also fill the rotary cavity with viscous oil for smoothness 19-Dec-19 04:09 PM ah, neat idea 19-Dec-19 04:09 PM ball bearings has always been part of another piece of the design 19-Dec-19 04:09 PM (wher eyou put your finger to apply downard pressure) 19-Dec-19 04:09 PM for the high torque bit 19-Dec-19 04:09 PM or high force 19-Dec-19 04:09 PM which current decent screwdrivers do anyways 19-Dec-19 04:10 PM for such tiny torques I'd go with a bushing 19-Dec-19 04:10 PM less to design, cheaper, easier to integrate 19-Dec-19 04:10 PM oh, yeah, I have basically a sleeve on paper for that part 19-Dec-19 04:10 PM part of the design/concept is how the cantilever beam is constrained 19-Dec-19 04:11 PM a high slip plastic bushing is probably the best idea 19-Dec-19 04:16 PM beyond magnetic and optical.. are there any other type of non-contact rotation detectors? 19-Dec-19 04:16 PM (contact could easily be done with ptoentiemeter or trimmer) 19-Dec-19 04:17 PM capacitive, kinda 19-Dec-19 04:18 PM yeah, I mentioned parallel plate 19-Dec-19 04:18 PM but magnetic is easiest to implement without massive amounts of analog voodoo 19-Dec-19 04:18 PM just not in that list, heh 19-Dec-19 04:18 PM right 19-Dec-19 04:18 PM optical can be relatively easy too 19-Dec-19 04:18 PM but requires some serious mechanical considerations 19-Dec-19 04:19 PM standard quadrature.. but do they make them small? 19-Dec-19 04:19 PM quadrature what? 19-Dec-19 04:19 PM oh, optical signal 19-Dec-19 04:19 PM yes 19-Dec-19 04:19 PM like, nothing fancy there 19-Dec-19 04:19 PM think emitter-mirror-offset photodiode 19-Dec-19 04:19 PM (in reference to the capacitive one which is trickery) 19-Dec-19 04:19 PM and slit disc? or is there another type of optical masking technique 19-Dec-19 04:21 PM I'd make it deflect a wide beam onto a photodiode 20-Dec-19 10:56 AM oh noes! espresso machine broke, and no 200v n channel mosfets on hand, will have to order them, will get it by tomorrow, but yeah 20-Dec-19 10:56 AM common repair for me.. making a new machine is on the list 20-Dec-19 11:01 AM Pull a fet from the nearest scrap ATX PSU? :D 20-Dec-19 11:01 AM I typically dont have coffee on the weekend, so I am fine waiting 20-Dec-19 11:01 AM also, the street is flooding 20-Dec-19 11:01 AM pouring down rain 20-Dec-19 11:11 AM Guess who finally put a cam on his helmet: 20-Dec-19 11:11 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/EMPk8XNXYAYCDSU-48BA3.png 20-Dec-19 11:22 AM A windshield for your windshield 20-Dec-19 11:50 AM Air deflector actually. I just feel no wind in my helmet at all, makes for more comfortable rides. 20-Dec-19 12:30 PM I had a naked bike for a while and man, getting hit in the neck by a bumblebee at 70mph is no fun. Windshields FTW - winshields, if you will 20-Dec-19 12:30 PM I'm a small enough guy that I could tuck perfectly on my sportbike as well, was like you were in the eye of a hurricane.. so calm, but surrounded by severe turbulence and chaos, lol 20-Dec-19 12:33 PM I have never been fond of nakeds 20-Dec-19 12:33 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/honda-cb500x-review-specs-motorcycle-adven-B3E90.png 20-Dec-19 12:35 PM I had an FZ1 for a while and that was a decent compromise, but it got so damn hot that it was uncomfortable as all hell in the summer here in FL 20-Dec-19 12:36 PM I have riden mine in 38 ºC and was comfortable enough 20-Dec-19 12:36 PM but also, it's only 48CV 20-Dec-19 12:36 PM yea it's just the way the radiator was situated and lack of full fairing and whatnot, it just piped the heat right to your thighs 20-Dec-19 12:37 PM XDDDDDD 20-Dec-19 12:37 PM e.g. 20-Dec-19 12:37 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/2bac45340b4938b5-D86CB.png 20-Dec-19 12:37 PM the radiator was just so big and the geometry just worked out where it heated you up hardcore 20-Dec-19 12:37 PM It's pretty, but yes, your legs will hug the motor 20-Dec-19 12:37 PM gotta go fast to cool the rider 20-Dec-19 12:37 PM XD 20-Dec-19 12:38 PM yea on the interstate it wasn't bad 20-Dec-19 12:38 PM Also my windshield is much more agressive in angle. 20-Dec-19 12:38 PM that has to be noticeable 20-Dec-19 12:38 PM but any stop and go was just the worst 20-Dec-19 12:38 PM XDDDDDD 20-Dec-19 12:39 PM I had/have (needs work) a plated Suzuki Drz400K that I converted to supermotard before the Drz400sm was around and it was probably my favorite around-town bike I've ever owned 20-Dec-19 12:39 PM bored and stroked to 485cc, hotcams, 13.5:1 compression, the works.. so freakin' torquey 20-Dec-19 12:43 PM How much power does it make with those mods? 20-Dec-19 12:44 PM I never dyno'd it or anything but I would estimate somewhere around 50hp, not sure 20-Dec-19 12:44 PM that's a partial list, also had exhaust and whatnot 20-Dec-19 12:45 PM XDDD 20-Dec-19 12:45 PM I just want to change the blinkers in mine to sequentials 20-Dec-19 12:45 PM the rest is fine 20-Dec-19 12:46 PM Hmm, I'm looking for a single cylinder engine for a FSAE car, so it will have custom exhausts, intakes, electronic fuel injection with our own ECU and tune 20-Dec-19 12:46 PM ~60hp would be nice with resonant tuning 20-Dec-19 12:46 PM yea this bike was from my youth, circa 2001. back when I was all about modding and such like most males that age (like 16) 20-Dec-19 12:46 PM that's doable with modern 4-stroke single cylinder bike motors 20-Dec-19 12:46 PM the DRZ was by no means a top competitor as far as power goes.. something like a CRF450 would stomp it 20-Dec-19 12:47 PM We have that now, Honda CBR600RR 20-Dec-19 12:48 PM nah, 4-stroke not 4-cyl 20-Dec-19 12:48 PM Oh, sorry, I misread 20-Dec-19 12:48 PM was just differentiating on the dirbike aspect since 2-stroke is still a thing in that realm 20-Dec-19 12:48 PM you could look into something like a XR600 motor, no replacement for displacement and whatnot 20-Dec-19 12:48 PM do you have any limitations on displacement? must be naturally asperated or anything like that? 20-Dec-19 12:49 PM That's too heavy 20-Dec-19 12:49 PM *xr650 sry, not 600 20-Dec-19 12:49 PM ah, gotcha 20-Dec-19 12:50 PM Yeah, 600cc is pretty much all we can run. There is a 20mm restrictor for naturally aspirated cars 20-Dec-19 12:50 PM must it be 4-stroke? 20-Dec-19 12:50 PM So 100hp is really all you can make and that's with a lot of hard work 20-Dec-19 12:50 PM No, 2-strokes are fine 20-Dec-19 12:50 PM But most competitive teams go with 4-stroke 20-Dec-19 12:50 PM The issue here is just weight 20-Dec-19 12:51 PM yea it's a wise choice when you're trying to put power to the ground 20-Dec-19 12:51 PM something like the CR500 would be pretty damn good for power:weight 20-Dec-19 12:51 PM 2 stroke in general is pretty killer just 'cause no mass from valves, cams, etc 20-Dec-19 12:51 PM The whole freaking car weighs like 400lb with fluids and no driver 20-Dec-19 12:51 PM lol that's nuts 20-Dec-19 12:51 PM downside of course is nonlinear power and lack of low end torque 20-Dec-19 12:52 PM That's with full active aero kit and cooling for a 4-cylinder car 20-Dec-19 12:52 PM that's insane.. I want one 20-Dec-19 12:52 PM Low end torque really matters, and you cannot stall the engine 20-Dec-19 12:53 PM it's been quite a while since I've done any tuning sort of stuff so I'm out of the loop on modern options unfortunately 20-Dec-19 12:53 PM I think most people are going with KTMs 20-Dec-19 12:54 PM yea that's a good choice too, the 525cc motors are nice and dense 20-Dec-19 12:54 PM KTM 500 EXC for example 20-Dec-19 12:54 PM as far as aftermarket goes you may be better off with some of the big-4 bikes' engines though, especially if cost is a concern 20-Dec-19 12:54 PM e.g. you may be better off starting with a CRF450 motor and tuning it versus a slightly tuned 500EXC or similar 20-Dec-19 12:54 PM big-4 as in honda, suzuki, yamaha, kawasaki 20-Dec-19 12:56 PM The restrictor really does kill off top end power for big 4 cylinders 20-Dec-19 12:56 PM Power curve is flat after 12000 RPM 20-Dec-19 12:56 PM restrictor? 20-Dec-19 12:56 PM Yeah, a 20mm intake restrictor 20-Dec-19 12:56 PM oh wow, so 20mm diameter intake limit imposed? 20-Dec-19 12:57 PM Yep, but it's a very carefully designed convergent-divergent part 20-Dec-19 12:57 PM yea just saw in your earlier statement, indeed 20-Dec-19 12:57 PM yea so at least they're not screwing you with turbulent flow eh 20-Dec-19 12:57 PM wow yea that's a problem 20-Dec-19 12:57 PM e.g. my DRZ has a 41mm intake 20-Dec-19 12:57 PM We design and make our own intakes 20-Dec-19 12:57 PM The key is to exploit resonant tuning as much as possible, plenum pressue will be low due to restrictor even if you run a turbo 20-Dec-19 12:57 PM With a turbo it's a 19mm restrictor 20-Dec-19 12:58 PM interesting challenge for sure 20-Dec-19 12:59 PM So really no power advantage there, you gain torque on the low end though 20-Dec-19 12:59 PM I gotta head off and get this chamber out of my truck bed 20-Dec-19 12:59 PM gonna have to disassemble it as I have no helpers today and rains are coming tomorrow morning >< 20-Dec-19 12:59 PM good chats, I will let the challenge ferment in my brain and hit you up if I get any stroke of genius hehe 20-Dec-19 01:16 PM good luck! 20-Dec-19 03:23 PM I've got a klr 650 as well as a ke100 20-Dec-19 03:23 PM The latter being 2 stroke 21-Dec-19 10:35 PM Who’s up on their Russian. This is some kind of soviet era very fine cloth insulated conductor. Came in a batch of stuff from the defunct RCH labs. Apparently this tent through their “cryo” process too No clue what this stuff is for. 21-Dec-19 10:35 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/image0-B4DCA.jpg 21-Dec-19 10:35 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/image0-65D50.jpg 21-Dec-19 10:55 PM lemme ask my freind that I am chatting with right now (who is russian and is in Sahkalin right now) 21-Dec-19 10:56 PM I speak Russian 21-Dec-19 10:56 PM just in case people don't know 21-Dec-19 10:56 PM oh, right, heh 21-Dec-19 10:56 PM @Charles it doesn't say what it is 21-Dec-19 10:57 PM Oh. I was hoping it said something interesting 21-Dec-19 10:57 PM top is "GLAVKABEL MEP SSR" (some sort of name) Dia 0.06, Date 18/4 1959 Working number(?) 4579 NETTO(blank) kg BRUTTO(blank) kg Num of cuts- 21-Dec-19 10:57 PM And then I think it says ПЭЛШО 21-Dec-19 10:57 PM Which does make sense 21-Dec-19 10:57 PM PELShO means Провод [медный] Лакостойкий Эмалированый [в] Шелковой Оплётке 21-Dec-19 10:57 PM Wire [copper] Lacquer-resistant Enameled [in] Silk Sheating 21-Dec-19 10:57 PM GOST 6524-52 21-Dec-19 10:57 PM GOST means GOvernment STandard 21-Dec-19 11:00 PM Silk insulated. Sounds fancy for Soviet era. I though they just wrapped conductors with the lies of the capitalists! Hahahaha 21-Dec-19 11:01 PM Silk or cotton I'm guessing 21-Dec-19 11:01 PM It was pretty common in higher end gear IIRC 21-Dec-19 11:02 PM Whatever it is it actually appears to be pretty well made, but the conductor is so thin I think all it would be useful for is like wrapped as a coil or something. It actually kinda feels like the wife used in ferrite stick antennas but that is multi conductor usually 21-Dec-19 11:03 PM I don't think they used wives as source material for manufacturing antennas 21-Dec-19 11:03 PM But yes, it's a wire made for winding 21-Dec-19 11:31 PM /me goes to wake up the wife and tell her to start winding 22-Dec-19 02:59 PM https://cdn.discordapp.com/attachments/499636290250211329/658441013966143488/07-mike-pence-nasa-do-not-touch.png 22-Dec-19 02:59 PM https://cdn.discordapp.com/attachments/499636290250211329/658443342530740227/wpu2fgn7ogm6sfnxrsty.png 22-Dec-19 03:00 PM "DO NOT TOUCH" is in quotes 22-Dec-19 03:02 PM Oh it just came back 22-Dec-19 03:02 PM After getting lost in space that is 22-Dec-19 03:02 PM Must be his fault 22-Dec-19 03:03 PM The finger prints must have added unaccounted mass that it confused the inertial measurement system 22-Dec-19 08:36 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20191222_2009492-82709.jpg 22-Dec-19 08:36 PM So how different can a truck be from an SEM? 22-Dec-19 08:39 PM the pressure gauges read in this weird "positive" direction 22-Dec-19 08:40 PM And for some reason the faster the turbo, the higher the pressure reading! 22-Dec-19 08:41 PM Nah no turbo on this one 22-Dec-19 08:41 PM That one needs new injectors right now 22-Dec-19 08:45 PM https://www.ebay.com/itm/CX-Turbo-Manifold-Header-Intercooler-Piping-Kit-For-97-03-Ford-F150-4-6L-V8-NA-T-/183638803453 22-Dec-19 08:45 PM You can always put one in 23-Dec-19 05:08 AM https://www.youtube.com/watch?v=OuFlISa73Sw 23-Dec-19 09:42 AM Love that guy's stuff, he has some great videos. 23-Dec-19 11:52 AM met another Dalmatian on our walk.. Domino! 23-Dec-19 11:52 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/DSC_0769-7B7E9.jpg 23-Dec-19 11:52 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/DSC_0765-05F8B.jpg 24-Dec-19 12:25 AM So I just discovered NXP make breakneck fast processors in low cost hobbyist-friendly packaging 24-Dec-19 12:25 AM https://www.nxp.com/products/processors-and-microcontrollers/arm-microcontrollers/i.mx-rt-series/i.mx-rt1020-crossover-processor-with-arm-cortex-m7-core:i.MX-RT1020 24-Dec-19 12:25 AM https://www.digikey.com/product-detail/en/nxp-usa-inc/MIMXRT1021DAF5A/568-13952-ND/8135065 24-Dec-19 12:25 AM Half a GHz in a $7 LQFP100 24-Dec-19 12:25 AM That is nuts 24-Dec-19 12:25 AM Looks like NXP entirely dominates in this market besides just a few STM32 parts with embedded flash 24-Dec-19 12:25 AM More specifically the STM32H750 24-Dec-19 12:29 AM I like the LPC4370 myself 24-Dec-19 12:29 AM on paper anyway 24-Dec-19 12:29 AM the ADC is super fast 24-Dec-19 12:29 AM half the performance 24-Dec-19 12:29 AM but the adc and periphs are nice 24-Dec-19 12:29 AM plus you can get them on dev boards for $20 24-Dec-19 12:29 AM as the LPC link v2 24-Dec-19 12:29 AM BGA only it looks like 24-Dec-19 12:29 AM https://www.digikey.com/product-detail/en/stmicroelectronics/STM32H750VBT6/497-18110-ND/9453371 24-Dec-19 12:29 AM This is interesting though 24-Dec-19 12:29 AM https://www.st.com/en/microcontrollers-microprocessors/stm32h750-value-line.html 24-Dec-19 12:29 AM High performance value line 24-Dec-19 12:30 AM https://www.embeddedartists.com/products/lpc-link2/ 24-Dec-19 12:30 AM https://www.nxp.com/design/microcontrollers-developer-resources/lpc-microcontroller-utilities/lpc-link2:OM13054 24-Dec-19 12:30 AM $20, 18 euros 24-Dec-19 12:30 AM comes with a programmer 24-Dec-19 12:30 AM (on board) 24-Dec-19 12:31 AM In an unsolderable package 24-Dec-19 12:31 AM .4 pitch BGA 24-Dec-19 12:31 AM well yeah, I just bought the boards and some connectors for the headers 24-Dec-19 12:31 AM the H750 looks interesting 24-Dec-19 12:31 AM 128k of flash and 1MB of RAM lol 24-Dec-19 12:31 AM flash sure is expensive 24-Dec-19 12:32 AM how many cores are those? 24-Dec-19 12:32 AM 1 24-Dec-19 12:32 AM ah, the 4370 is 3 24-Dec-19 12:32 AM I guess different applications tho 24-Dec-19 12:32 AM I was thinking of using the 4370 for something like a spectrometer maybe 24-Dec-19 12:33 AM it's not really 3 core 24-Dec-19 12:33 AM it's closer to single core + built in housekeeping 24-Dec-19 12:33 AM what do you mean, it sure is 24-Dec-19 12:33 AM just three cortexes bolted together on an AHB 24-Dec-19 12:33 AM a parallel core is a parallel core 24-Dec-19 12:33 AM would be quite hard to program 24-Dec-19 12:33 AM but for the price can't complain 24-Dec-19 12:33 AM except, you know, for the absolute horror show of a BGA probably requiring 4 layers to lay out at the minimum 24-Dec-19 12:34 AM I don't think it'd be any harder than something like a parallax propeller 24-Dec-19 12:34 AM https://www.ebay.com/itm/HFS-R-8-to-3x1-5-Tri-Clamp-Extractor-Lid-2-X-1-4-Fnpt-and-2-X-1-2-Fnpt/273311562090?_trkparms=aid%3D777001%26algo%3DDISCO.FEED%26ao%3D1%26asc%3D40719%26meid%3D8a1dd456d04b4955a21ce70909eb8ffa%26pid%3D100651%26rk%3D1%26rkt%3D1%26itm%3D273311562090%26pmt%3D0%26noa%3D1%26pg%3D2380057&_trksid=p2380057.c100651.m4497&_trkparms=pageci%3Af5f90881-2627-11ea-bc41-74dbd180a239%7Cparentrq%3A37097ba316f0ac3c6a91ecb2ffa2acba%7Ciid%3A2 24-Dec-19 12:34 AM sexy triclamp 24-Dec-19 12:34 AM looks like e-beam welded 24-Dec-19 12:35 AM I highly doubt that for a triclamp 24-Dec-19 12:35 AM I'd say TIG and polish 24-Dec-19 12:35 AM could be mass production e beam really 24-Dec-19 12:36 AM Can't offer proof against that. 24-Dec-19 12:36 AM if only vacuum stuff was that cheap 24-Dec-19 12:36 AM a CF or KF alternative to that piece is like one or two more zeroes if brand new 24-Dec-19 12:46 AM Yeah 25-Dec-19 09:23 AM Depending on level required you could always just braze copper pipe together and clean it really well. 25-Dec-19 09:23 AM That’s what i typically do. Perfectly good down the the -8 range. 25-Dec-19 09:23 AM Past that your gas loads and virtual leaks require extreme measures and generally custom manufacturing no matter what. 25-Dec-19 09:41 AM @Charles know anything about soldering instead, what it would be good until? 26-Dec-19 03:37 PM I questioned determining the thickness of t hin films before.. here is another method: https://en.wikipedia.org/wiki/Prism_coupler 26-Dec-19 03:37 PM what rabbit hole I went down this time, however, was an alternative to a standar glass scale (DRO) where the 'scale' is an accurately ground angle of "glass".. and beaming a laser at it could be detected elsewhere of the distance/thickness at the point of the laser, thusly detecting relative change in position 26-Dec-19 03:37 PM not entirely sure of the feasability of such things.. but I was unable to find a price for a certain Heidenhain scale I was interested in.. 26-Dec-19 03:37 PM so I decided to think of a "new" method.. why not 26-Dec-19 05:28 PM @Noxz maybe a hemocytometer? 26-Dec-19 08:02 PM if only they made them in a length I would require (say, for a lathe or mill) 28-Dec-19 10:31 AM Anyone know software for simulation of dielectriphoresis 28-Dec-19 10:38 AM @Applied_Ion might. 28-Dec-19 10:39 AM Sorry no, just vacuum, sputtering, fields, and particle beam lol 28-Dec-19 10:54 AM XDDD 28-Dec-19 11:41 AM I have a neat ref of electrophoresis being used to coallesce biodiesel from the NaOH + MeOH + Water - using a "coaxial" method, so you have a rod in the center and a tube on the outside that form your voltage difference (insullated rod or similar) and you create that electric field, an yeah, due to the shape, as the dispersion moves towards the center the 'bubbles' will merge and once heavy enough drop to the bottom 28-Dec-19 01:35 PM @Noxz a little hard to completely stomach that and call it biodiesel if it requires methanol, naoh (made from electricity) and then more electricity 28-Dec-19 01:35 PM Biodiesel to me is hacking algae to directly poop out long chain hydrocarbons 28-Dec-19 01:36 PM it's transesterification.. 28-Dec-19 01:36 PM it comes from a biological source (spent french fry oil, for instance) 28-Dec-19 01:36 PM and yeah, long chain = diesel 28-Dec-19 01:36 PM biodiesel basically gets rid of the glycerin back bone, which is 'sticky' 28-Dec-19 01:36 PM you can swap out MeOH for EtOH or iPrOH and get even lower pour/freeze/cloud points 28-Dec-19 01:36 PM used for winterizing sometimes 28-Dec-19 01:36 PM acid catalyzed transesterification exists as well, but it is slower 28-Dec-19 01:36 PM I was interested in a fairly novel "acid" based method that I need to try out at some point 28-Dec-19 01:36 PM I love the idea of growing algea for it.. just requires some form of food for them (fertalizer).. I certainly wouldnt have the space here to try it.. you see some dudes on youtube having an array of waterbottles with some HPS lights aimed at them in their basement 28-Dec-19 02:06 PM Oh, you didn't mention a waste oil in your original post 28-Dec-19 02:06 PM Growing indoors isn't going to work for mass scale up 28-Dec-19 02:06 PM Basically has to be open salt water ponds in the desert 28-Dec-19 02:06 PM I've made soap a few times so i do know about transesterification 28-Dec-19 02:06 PM And done a bunch of research into making biodiesel or running straight waste vegetable oil, since I've got a diesel car 28-Dec-19 02:09 PM ah, nice 28-Dec-19 02:21 PM yeh looking for dielectrophoresis stuff specifically. Ac waveform, if you have an uneven electric field you can trap particles in microfluidic setups 28-Dec-19 02:21 PM trying to model electric field of patterned surface electrode 28-Dec-19 02:21 PM And fluidics modeling on top of that 28-Dec-19 02:33 PM If you want to do fields and fluidics modeling simultaneously, COMSOL is the way to go, but it is very costly 28-Dec-19 02:34 PM Still no reply from them 28-Dec-19 02:34 PM So it's a total no for educational/hobby licenses 28-Dec-19 02:39 PM They have educational license packages, but not single educational license discounts. Several single license options, but not specific for education, hobby, industry. Just one for everything 28-Dec-19 02:39 PM So only fivefinger "student licensing" 28-Dec-19 11:52 PM multiphysics 28-Dec-19 11:52 PM and after weeks of comsol pain without help from the support you're ending up using fortran libraries in python 29-Dec-19 02:26 AM I was planning to use FENICS with dolfin... but still haven't got around to it yet 29-Dec-19 02:26 AM seems to be a search few hits for 'fenics dolfin "electrophoresis"' 31-Dec-19 09:47 PM https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4284091/#__ffn_sectitle 31-Dec-19 09:47 PM The tenth cooking cycle, resulted in an average of 88 μg of Ni and 86 μg of Cr leached per 126 g serving of tomato sauce. 31-Dec-19 09:47 PM Foods high in nickel include peanuts, peas, oatmeal, and milk chocolate; 956, 699, 495, 871 μg/kg respectively 31-Dec-19 09:47 PM Acidic solutions, like acetic acid, may not be sufficiently similar to acidic foods that are composed of a complex array of chemistries. While overall, results suggest that Ni and Cr are leached from stainless steel into non-food acidic solutions and foodstuffs during cooking processes (15–18), the estimated Ni or Cr contribution from cookware to a serving of acidic food is not well characterized. 31-Dec-19 09:47 PM Welp, if you're having chromium or nickel contamination in your plasma processes..... 31-Dec-19 09:47 PM "Three stainless steel Standard Reference Materials (SRMs), NIST 121d, NIST 123c, and NIST 160b, from National Institute of Standards and Technology (Gaithersburg, MD) were used" 31-Dec-19 09:47 PM Hmm, so they didn't actually use 304 or 316... I'm not sure how metallurgically different they are from those standards 31-Dec-19 09:47 PM They just say: "The SRMs are equivalent in Ni and Cr mass fraction to stainless steel (SS) grades commonly used in cookware; other constituents were also nominally the same," 31-Dec-19 09:47 PM Oh, "One commercially obtained grade 316 stainless steel saucepan was tested. " 31-Dec-19 09:54 PM https://www.plano-em.de/katalog/standards-fuer-die-mikroanalyse/verfuegbare-referenzmaterialien/nistnbs-standards/ 31-Dec-19 09:54 PM is that accurate? 31-Dec-19 09:54 PM seems like the nist standards are just super standard versions of regular grades 31-Dec-19 09:54 PM if the chart is accurate the NIST160b = 316 31-Dec-19 09:54 PM NIST121b = 321 31-Dec-19 10:16 PM "Additional factors, such as the specific chemical composition and saucepan manufacturing, may be contributing to the variability observed between the SS 316 grades and with the saucepan for the Ni leaching. " 31-Dec-19 10:17 PM "And also the powdered nickel cuvette that fell into our meal" 31-Dec-19 10:18 PM Hehe 31-Dec-19 10:18 PM interesting though 31-Dec-19 10:18 PM Seems the main issue is dermatitis, which i may or may not have a minor amount of... Kinda just assumed i had bunk genetics or stress/hormones 31-Dec-19 10:19 PM I think we will find something very pervasive/ubiquitous/common has been giving us all cancer this whole time - something simple like this ni/cr from common cookware 31-Dec-19 10:19 PM My wife and kid dont seem to have anything, but if it's allergic, then its gonna be pretty variable 31-Dec-19 10:19 PM aside from the sun of course 31-Dec-19 10:19 PM move to california, everything gives you cancer 31-Dec-19 10:19 PM says so right on the labels 31-Dec-19 10:19 PM I'm in Florida and California still gives me cancer 31-Dec-19 10:19 PM haha you're welcome 31-Dec-19 10:20 PM could also just be the cigarettes though 31-Dec-19 10:21 PM also happy new year to you east coast people from someone still living in the past 31-Dec-19 10:21 PM 2019 forever! (or at least the next couple hours) 31-Dec-19 10:21 PM yeap CST here, just crossed over a bit ago to that good good 01-Jan-20 12:55 AM yay 01-Jan-20 01:07 PM man.. now I gotta remember the new year date to write on everything that requires it 01-Jan-20 03:11 PM you'll get the hang of it by October or so 01-Jan-20 11:58 PM 02-Jan-20 01:14 AM Aliexpress sells the weirdest things: 02-Jan-20 01:14 AM https://www.aliexpress.com/item/4000174162166.html?spm=2114.12010612.8148356.29.42173801xVWuiV 02-Jan-20 01:14 AM (for a random chinese shop, I mean) 02-Jan-20 01:19 AM (For research purposes) 02-Jan-20 03:57 AM <__ice9#6039> Foamed zirconia is super useful for making very high temperature support platforms and thermal insulation 02-Jan-20 03:57 AM <__ice9#6039> Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/signal-2020-01-01-134749-4C181.jpg 02-Jan-20 04:12 PM I came across a small animal guillotine (lab mice etc) on eBay the other day while browsing a given seller's wares. Had "rust stains" near the blade. I suppose it's not a wrong statement, just happens that it was the iron from blood that was rusting, lol. 02-Jan-20 04:14 PM that sure is a whole category of scientific apparatus i was hitherto unaware of 02-Jan-20 04:14 PM Same! 02-Jan-20 04:25 PM Foamed metals work well for electrolysis sort of tasks btw 02-Jan-20 05:04 PM if you want a similar type of electrode with high surface area, but inert you can also use reticulated vitreous carbon 02-Jan-20 05:04 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/image0-0A314.jpg 02-Jan-20 05:04 PM Relatively inert I mean lol 02-Jan-20 06:36 PM from #swap-meet -- I even get to upgrade my thinkpad to use this camera, I'm so excited 02-Jan-20 06:36 PM I have a bunch of C-mount lenses that should suffice for it, I believe, and I might get a chance to stick an intensifier in front of it at some point 02-Jan-20 06:38 PM But at last I have successfully coaxed someone into the world of high speed imaging 02-Jan-20 06:38 PM I was right on the cusp there for the longest time tbh 02-Jan-20 06:38 PM but thanks for being the gateway drug ;D 02-Jan-20 06:39 PM I've owned 6 high speed cams in total 02-Jan-20 06:39 PM Now down to 3, one is dead as a doorstop and ancient 02-Jan-20 06:39 PM There's a hadland imacon I was staring at sideways for a while and I don't think I could trust myself with that kind of camera 02-Jan-20 06:39 PM this seems like a much better place to get started 02-Jan-20 06:39 PM Hadland imacons are surprisingly useless for actual imaging 02-Jan-20 06:39 PM They're for the physics-oriented ultra short event weirdos who don't mind a resolution of 2048x1 02-Jan-20 06:40 PM helo 02-Jan-20 06:40 PM :³ 02-Jan-20 06:40 PM Not so much imaging but closer to like 02-Jan-20 06:40 PM "Yep, 'twas bright around there" 02-Jan-20 06:41 PM yeah like fast time resolved 1D measurements; i was specifically curious about streak cameras to that end 02-Jan-20 06:41 PM In that case there's often "cheap" options you can pick up 02-Jan-20 06:41 PM But most are film-based 02-Jan-20 06:41 PM film scares me 02-Jan-20 06:41 PM it looks like complications and chemicals or putting a whole lot of faith in the local drug store 02-Jan-20 06:42 PM "What ISO is this?" "Uhhhhh" 02-Jan-20 06:44 PM :D 02-Jan-20 06:44 PM iirc it was originally used with some monochrome ISO 3200 stuff 02-Jan-20 06:44 PM the name Kodachrome comes to mind but i'm not certain 02-Jan-20 06:47 PM Kodachrome is kodachrome 02-Jan-20 06:47 PM But yeah, more modern ones use CCDs 02-Jan-20 06:47 PM Also, major nerdistry: 02-Jan-20 06:47 PM https://www.shimadzu.com/an/test/hpv/hpv-x2/feature2.html 02-Jan-20 06:47 PM An image sensor with on-board image storage 02-Jan-20 06:47 PM And the world's fastest conventional(RAM-based) high speed camera 02-Jan-20 06:47 PM https://www.nacinc.com/products/memrecam-high-speed-digital-cameras/acs/ 02-Jan-20 06:47 PM Though if I had a choice between the ACS and this: 02-Jan-20 06:47 PM https://www.phantomhighspeed.com/products/cameras/ultrahighspeed/v2640 02-Jan-20 06:47 PM I'd choose the v2640, simply because it does 4MP 02-Jan-20 06:52 PM 142ns exposure.. 02-Jan-20 06:52 PM just a hair under 40Gpix/s 02-Jan-20 06:55 PM Speaking of high speed cameras, I got that Hadland image converter framing camera after selling my old ICCD @Deleted User 02-Jan-20 06:55 PM https://www.ebay.com/itm/Hadland-Imacon-792-Ultra-High-Speed-Camera-In-Case/152669308644 02-Jan-20 06:56 PM Oh, neat! 02-Jan-20 06:56 PM The seller is delivering it next week herself 02-Jan-20 06:57 PM heh 02-Jan-20 06:57 PM Managed to get the manual for it too 02-Jan-20 06:57 PM Going to see if I can convert it to a CCD 02-Jan-20 06:57 PM It does not come with the steak imaging module 02-Jan-20 06:58 PM Steak imaging module 02-Jan-20 06:58 PM juicy 02-Jan-20 07:00 PM Framing speed 02-Jan-20 07:00 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/unknown-A564F.png 02-Jan-20 07:00 PM Incredible old tech 02-Jan-20 07:00 PM Streak lol 02-Jan-20 07:00 PM How many frames can you get out of it? 02-Jan-20 07:01 PM Up to 50 02-Jan-20 07:01 PM A good 2 seconds of watchable video 02-Jan-20 07:01 PM Quite amazing that you can still get that out of a $500 camera 02-Jan-20 07:02 PM I'll most likely use 16 frames at a few Mfps 02-Jan-20 07:02 PM I threw in an offer of $200 and convinced the seller 02-Jan-20 07:02 PM The HPV-X2 only does 128 frames and costs about a thousand times more 02-Jan-20 07:02 PM :P 02-Jan-20 07:02 PM A few thousand times more 02-Jan-20 07:03 PM Yeah we'll see if it performs, for all I know it could be completely broken 02-Jan-20 07:03 PM Nothing a bit of vacuum can't fix, unless the plates are shattered or something 02-Jan-20 07:05 PM If the plates moved or are altered too much it might just be impossible to focus 02-Jan-20 07:07 PM For $200 it's worth a gamble if you need Mfps 02-Jan-20 07:08 PM I was really more going for the exposure time and the high gain 02-Jan-20 07:08 PM That's useful too 02-Jan-20 07:08 PM I wonder if you can do gating in a regular intensifier with some hackery 02-Jan-20 07:08 PM Also had enough of the crap from Princeton Instruments 02-Jan-20 07:46 PM I think you can do it, just by applying a high enough negative potential to the photocathode with super fast rise time 02-Jan-20 07:46 PM For regular intensifier tubes there may be a risk of breakdown though 02-Jan-20 07:46 PM So for the digital conversion, I should be able to just point a DSLR camera at the phosphor and leave it on open shutter right? 02-Jan-20 07:54 PM Yeah you should 02-Jan-20 07:54 PM But it's probably less "point at" and more "glue the sensor to" with a bit of optical grease 02-Jan-20 08:06 PM https://hofstragroup.com/hadland-cameras-ccd-cmos-upgrade.html 02-Jan-20 08:06 PM That's pretty much what I want to make 02-Jan-20 08:06 PM $9,430 lol 02-Jan-20 08:07 PM Well, pointing a camera at it is step 1 02-Jan-20 08:07 PM You can upgrade to either direct mount or telecentric de-magnifying lenses 02-Jan-20 08:08 PM The phosphor is too large for direct mount 02-Jan-20 08:08 PM telecentric demagnifier then 02-Jan-20 08:33 PM There's a lot of Melles Griot Invaritar series of telecentric lenses floating around eBay, but I cannot find detailed data for the cheap ones 02-Jan-20 08:33 PM https://www.ebay.com/itm/melles-griot-invaritar-p-n-59-lgf-414-/282917179228 02-Jan-20 08:34 PM pull the beam expander from the laser 02-Jan-20 08:34 PM there's your telecentric demag 02-Jan-20 08:34 PM :P 02-Jan-20 08:34 PM Hey that's a pretty good idea 02-Jan-20 08:34 PM But I like these lenses because they have a c-mount 02-Jan-20 08:34 PM Worst case scenario here is just sticking with the flat pack Polaroid film 02-Jan-20 08:44 PM But damn, the right ones are hard to find and quite pricey now 02-Jan-20 08:44 PM The manual says it takes Polaroid type 612 02-Jan-20 10:45 PM oh gosh, that was the imacon i was being tempted by @Mason_Yu :D 02-Jan-20 10:45 PM glad it's going to a good home ^^ 02-Jan-20 10:47 PM I'm glad you got a high speed camera as well! It's got to be more useful than this 44kg beast of a camera 02-Jan-20 10:47 PM Man I'm going to actually break my back next time I move 02-Jan-20 10:48 PM i'll work my way up eventually i'm sure 02-Jan-20 10:51 PM Does anyone know of a high ISO film that's still available for cheap? 02-Jan-20 10:51 PM Like >ISO 3200? 03-Jan-20 08:16 AM https://www.youtube.com/watch?v=w6O7K7Ij2Rk 03-Jan-20 12:35 PM interesting premise but it seems almost more like he is fishing for investments than giving a useful talk... or just the title way oversells things heh 03-Jan-20 12:35 PM will be interesting to see if he can get the optical side of things to work 03-Jan-20 12:39 PM The talk title says "Build your own quantum computer at home" 03-Jan-20 12:39 PM The talk content does none of that 03-Jan-20 12:39 PM I skipped through it and all I got was "How do quantum computers work - an explanation not by me" "Ion traps! That don't work. Not to scale." "Lasers!" "Vacuum... 3d printing... milling?" "HACKING! It's HACKING!" 03-Jan-20 12:41 PM so... not worth a watch? 03-Jan-20 12:42 PM nope 03-Jan-20 12:42 PM You know everything in that talk 03-Jan-20 12:44 PM i had it going at 2x in the background while i was cleaning some stuff...kept waiting for it to get interesting 03-Jan-20 12:44 PM how cagey he gets in the Q&A bit is amusing 03-Jan-20 12:52 PM i saw 3d printing and UHV mentioned in the same sentence and got really excited for nothin' 03-Jan-20 12:52 PM you know what the ion-trapping-at-home hackers really need? a good stupid simple mathieu stability calculator that lets you plug in one of [whatever trap geometry you threw together] / [whatever quadrupole driver supply parameters you already have] and gives you design parameters for the other thing 03-Jan-20 12:52 PM i've played with http://cds.iisc.ac.in/faculty/amohanty/paulTrapStability.html a bit already but i am lazy and encourage maximum laziness whenever possible 03-Jan-20 01:16 PM write a calculator and I'll host it :P 04-Jan-20 01:25 AM https://i.ebayimg.com/images/g/x-kAAOxy-1lRHclF/s-l500.jpg 04-Jan-20 01:25 AM mmm, donuts 04-Jan-20 06:43 AM ehehe 04-Jan-20 11:14 AM just won a full PTFE KNF pump for chemistry, in parallel rated at 50 torr, but if series, appears I can get it to 10 torr 04-Jan-20 11:14 AM will replace my rigged up double series pumps which gets about 50 torr, and not PTFE (which sucked when I had DMF sucked through one time) 05-Jan-20 10:16 AM I should check the range of the Pirani gauge I have.. if I should try to interface with that to test the new pump.. 05-Jan-20 10:16 AM also, would there be any advantage to adding a diaphragm pump before/after a rotary vane pump in a turbo setup? 05-Jan-20 10:35 AM no, there shouldn't be 05-Jan-20 11:05 AM okay, wasn't sure if pressure differential mattered much 05-Jan-20 11:05 AM at that level 05-Jan-20 12:54 PM Anyone in here ever make their own MOSFET gate driver for PWM? I tried last night using a pull-up on the gate, and an NPN pulling it down, via an arduino... And the MOSFET got quite hot... After throwing the circuit into a simulator it seems the MOSFET wasn't turning on all the way 05-Jan-20 01:04 PM https://imgur.com/gallery/g7Iide1 05-Jan-20 01:04 PM Was my attempt last night 06-Jan-20 12:01 AM magnetic wire heater like induction heating? 06-Jan-20 12:17 AM @nmz787 your 10k pull up is nowhere near sufficient to drive the fet hard 06-Jan-20 12:17 AM Other places said use 50k 06-Jan-20 12:18 AM Also dumb 06-Jan-20 12:18 AM But maybe that was as a switch 06-Jan-20 12:18 AM @N00N not induction, just resistive 06-Jan-20 12:18 AM The reason your fet gets hot is it spends way too much time in the linear region 06-Jan-20 12:18 AM Think of mosfets as capacitors 06-Jan-20 12:18 AM Was cleaning my office desk for last hour to setup oscope 06-Jan-20 12:18 AM Yeah, i figured it was 06-Jan-20 12:18 AM That's why i put the npn 06-Jan-20 12:19 AM You want to charge and discharge the capacitor as fast as possible 06-Jan-20 12:19 AM Both ways 06-Jan-20 12:19 AM Thinking it would dump current faster 06-Jan-20 12:19 AM I saw npn + pnp push pull designs 06-Jan-20 12:20 AM Why do you want to make your own driver though? 06-Jan-20 12:20 AM I wanted to get this heater warming yesterday 06-Jan-20 12:20 AM Surplus parts store wasnt open today or until Weds 06-Jan-20 12:20 AM Mail order also takes days 06-Jan-20 12:20 AM Wanted to do some in-vacuum tests with volatilizing some vapor dep precursors 06-Jan-20 12:20 AM Before end of week 06-Jan-20 12:22 AM Do you need a fet? 06-Jan-20 12:22 AM Have a few 06-Jan-20 12:25 AM Can't get away with just a BJT? 06-Jan-20 12:26 AM I only want to control between like 0 and 1 amp 06-Jan-20 12:26 AM So probably my tip127 will work 06-Jan-20 12:26 AM Just found i have these opto isolators https://www.digikey.com/product-detail/en/lite-on-inc/LTV-847/160-1370-5-ND/385840 06-Jan-20 12:26 AM Oops, was reading wrong page info 06-Jan-20 12:35 AM what temperatures/duration are you trying to manage? 06-Jan-20 12:35 AM 25-50c above ambient 06-Jan-20 12:35 AM About 5 or 10 grams of steel to heat up and keep at temp in vacuum 06-Jan-20 12:35 AM Microliters of liquid 06-Jan-20 12:36 AM That's going to only take a few mA 06-Jan-20 12:37 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/JPEG_20200106_003656-E097D.jpg 06-Jan-20 12:37 AM That heater might be way too low resistance 06-Jan-20 12:37 AM 0.4 ohm 06-Jan-20 12:37 AM 12/0.4 == 30 amps 06-Jan-20 12:37 AM yup lol 06-Jan-20 12:37 AM way too much 06-Jan-20 12:37 AM Thus i wanted to pwm 06-Jan-20 12:38 AM You want a much lower power heater 06-Jan-20 12:38 AM Maybe 10 ohms 06-Jan-20 12:39 AM But isn't there any way to make it work with this wire? 06-Jan-20 12:39 AM 0.4 ohms in a vacuum with that little thermal sinking will cause this thing to shoot up to hundreds of degrees 06-Jan-20 12:39 AM But with a bit of PWM it will work 06-Jan-20 12:40 AM I was able to get it like 8 or 10 degrees above room temp, but then realized the fet was crazy hot 06-Jan-20 12:40 AM People have speculated because there maybe ringing and induction and i am replying on the fet body diode 06-Jan-20 12:40 AM Or the fet isn't switching fully or fast enough 06-Jan-20 12:40 AM is the pwm really necessary if you just want to heat up that to a sorta arbitrary temp? 06-Jan-20 12:41 AM I wanted to control it via pwm 06-Jan-20 12:41 AM Otherwise i need some sort of current control 06-Jan-20 12:41 AM I think 06-Jan-20 12:41 AM just size the coil appropriately? 06-Jan-20 12:41 AM It's sized based on the crucible 06-Jan-20 12:41 AM I mean, i wrapped it, and thats all i can get onto it 06-Jan-20 12:41 AM I could double or triple wrap I guess 06-Jan-20 12:41 AM But seems a bit pointless, only gonna double or triple the resistance to 0.8 or 1.2 ohms 06-Jan-20 12:43 AM i guess what i am still not understanding is do you need to vary the temp or just vaporize your liquid 06-Jan-20 12:44 AM Well, it's an experiment, so i want some control 06-Jan-20 12:44 AM Since I don't know the optimal parameters 06-Jan-20 12:44 AM if you just need to get it hot to around a certain range sizing the coil and tuning with a pot... 06-Jan-20 12:45 AM Yes but it seems I'd need to order different wire 06-Jan-20 12:45 AM do you have some nichrome? there is that nice calculator already for that or you can just run the numbers w/ copper's resistance per foot 06-Jan-20 12:45 AM For that 06-Jan-20 12:45 AM I do, but its a ribbon, not round 06-Jan-20 12:45 AM So won't lay on the hemispherical surface well 06-Jan-20 12:45 AM And much wider 06-Jan-20 12:45 AM Probably could only get one or two wraps 06-Jan-20 12:45 AM Also, its not insulated 06-Jan-20 12:45 AM So will short on itself and the crucible 06-Jan-20 12:47 AM what insulation do you plan to have on the heating element that will not be off gassing like crazy? 06-Jan-20 12:47 AM A foot of 40 gauge copper is only 1.049 ohms 06-Jan-20 12:47 AM This is magnet wite 06-Jan-20 12:47 AM Wire 06-Jan-20 12:47 AM Hoping it will offgas once and be done 06-Jan-20 12:48 AM oof so you need like what...4-5ft of 40ga? 06-Jan-20 12:48 AM lol 06-Jan-20 12:48 AM Or insignificantly enough that my process isnt affected 06-Jan-20 12:48 AM maybe just go for pwm if you do not have any nichrome then 06-Jan-20 12:48 AM I bet i only have a foot of this 24 gauge wrapped now 06-Jan-20 12:48 AM I want to learn pwm on high powered fets anyway 06-Jan-20 12:48 AM Only really used pwm for small power devices before 06-Jan-20 12:48 AM Fets only for switches 06-Jan-20 12:48 AM Was thinking originally of just using a motor controller, easydriver 06-Jan-20 12:48 AM Since i could just talk digital to it 06-Jan-20 12:48 AM Or whatev, ttl currents 06-Jan-20 12:48 AM All high impedance 06-Jan-20 12:48 AM But i didnt know if using only one of the outputs would be ok, since they're designed for steppers 06-Jan-20 12:48 AM And someone on arduino IRC said why wouldn't I just use transistors/fet 06-Jan-20 12:48 AM Sooo, i dug my transistors out and here i am 06-Jan-20 12:52 AM maybe you can just use a resistor instead 06-Jan-20 12:52 AM and skip the coil 06-Jan-20 12:52 AM probably less off gassing too? 06-Jan-20 12:53 AM I did think of that, maybe would work 06-Jan-20 12:53 AM Seems like I'd still want some control via a transistor at least 06-Jan-20 12:54 AM yeah i was not trying to say no pwm just trying to solve the off gassing thing 06-Jan-20 12:54 AM i think we all have let the magic smoke out of something before and your process probably does not include that 06-Jan-20 12:58 AM Lol 06-Jan-20 12:58 AM Well, it was about to last night 06-Jan-20 12:58 AM I was at this lab i work part time at, next to a dental denture processing lab... Started smelling something weird and was hearing noises from over there... Thought maybe they were curing some resin for fake teeth and the smell was wafting over somehow 06-Jan-20 12:58 AM Then localized it to my Arduino and was thinking the voltage regulator on the Arduino didnt like simultaneously being pkugged into 5v usb and 12v from wall 06-Jan-20 12:58 AM Then realized it was the MOSFET 06-Jan-20 12:58 AM promptly unplugged 06-Jan-20 01:02 AM always nice to catch that sort of thing in time 06-Jan-20 01:02 AM sometimes the survivors have their quirks though 06-Jan-20 01:02 AM i had an arduino for awhile that had a 12v experience that would work perfectly 90% of the time but then have super weird errors writing new sketches to it the rest 06-Jan-20 01:02 AM drove me crazy until i realized it was just that board acting up 06-Jan-20 01:06 AM Mm, yeah I've had weird experiences like that with arduinos too 06-Jan-20 01:07 AM I have an idea 06-Jan-20 01:07 AM Thinking my serial cable was bad 06-Jan-20 01:07 AM Why not use a ceramic resistor? 06-Jan-20 01:07 AM could probably even mill a small crucible in it 06-Jan-20 01:07 AM Hmmm 06-Jan-20 01:07 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/41o6MkjJ4zL-186D2.png 06-Jan-20 01:07 AM Just size it so current draw is 1 amp Max? 06-Jan-20 01:08 AM About that yeah 06-Jan-20 01:08 AM I bet these are going to be ok in vacuum 06-Jan-20 01:08 AM I.e. 12v / 12 ohms? 06-Jan-20 01:08 AM mhm 06-Jan-20 01:08 AM Then pwm a transistor to reduce as needed 06-Jan-20 01:08 AM Mmm 06-Jan-20 01:08 AM Just remember that in vacuum, noone can hear it scream there's nowhere for heat to escape 06-Jan-20 01:08 AM Yeah 06-Jan-20 01:08 AM So your PID controller will have to be VERY lopsided 06-Jan-20 01:08 AM Kinda thinking that just means even better efficiency!!! 06-Jan-20 01:08 AM Lol 06-Jan-20 01:08 AM Yeah or that 06-Jan-20 01:09 AM the ramp up will be fun to write 06-Jan-20 01:09 AM P0.01 I999 D0.1 06-Jan-20 01:09 AM Was thinking the FEI GIS systems had their heaters outside the vac chamber to make PID easier due to the losses 06-Jan-20 02:01 AM Ugh, just realized the problem with ceramic resistor as heater, we wanted the crucible to be threaded so we can have a screw to seal it off, gonna unscrew it with a rotary feedthrough 06-Jan-20 02:47 AM Top to bottom, gpio, gate, FET output 06-Jan-20 02:47 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/JPEG_20200106_024717-2E499.jpg 06-Jan-20 04:01 AM 1n4001 and a 100uf decoupling cap seems to help marginally, taking the output spike to only 176V from 220... And bypassing the gpio resistor helps rise time on gate, but adds ringing to gpio, so i guess I need some resistor on the gpio, if just smaller 06-Jan-20 04:01 AM (1k installed now) 06-Jan-20 04:01 AM Any recommendations for a flyback diode? 06-Jan-20 04:01 AM I guess I need something faster??? Or less forward resistance? 06-Jan-20 04:01 AM I think schotky has lower forward resistance, but idk about speed 06-Jan-20 04:06 AM yeah 06-Jan-20 04:06 AM I did push and pull of the gate capacity of my induction heating stuff 06-Jan-20 04:07 AM Seems like schottky diodes have higher capacitance, which seems like that would mean they're slower 06-Jan-20 04:07 AM Oh, I also changed the gate pullup to 1k, didn't seem to obviously affect much, or I wasn't paying enough attention 06-Jan-20 04:07 AM @N00N got a schematic of that push pull? 06-Jan-20 04:42 AM simply used a npn pnp pair I got handy 06-Jan-20 04:42 AM BC817 and BC807 iirc 06-Jan-20 09:18 AM completely random but reminded me of it when I saw conflat cube 06-Jan-20 09:18 AM https://www.youtube.com/watch?v=4aGDCE6Nrz0 06-Jan-20 11:09 AM sigh I posted my conflat chamber in another channel of people mostly who don't care about vacuum stuff and I just found some high vacuum equipment abuse... 06-Jan-20 11:09 AM person in there was like "like my grinder stand?" 06-Jan-20 11:09 AM https://cdn.discordapp.com/attachments/499873492477411339/663819434338811980/20200106_110115.jpg 06-Jan-20 11:09 AM ... 06-Jan-20 11:11 AM Offer to buy that from him for scrap metal prices :P 06-Jan-20 11:12 AM He's a dingus, also I assume this is at a place of work... 06-Jan-20 11:12 AM And he is being "possessive" because he works there and wants to sound cool I guess 06-Jan-20 11:12 AM but yea I told him you could have sold that stuff, build a stand out of steel, then had money left over for gold leaf to put your name on it with 06-Jan-20 11:12 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/88-56A64.png 06-Jan-20 11:12 AM oh god 06-Jan-20 11:12 AM honestly if anything that's a more dignified use... 06-Jan-20 11:12 AM but yea I mentioned, if the knife edges are scrap I guess its just stainless steel tubing at that point 06-Jan-20 11:12 AM but honestly 06-Jan-20 11:13 AM Hear me out: Conflat bathroom drain 06-Jan-20 11:16 AM better than freaking galvanized pipe which rusts shut on itself often 06-Jan-20 11:16 AM god imagine a basement ceiling filled with conflat just for drain water 06-Jan-20 11:16 AM oh then swagelok for water feeds 06-Jan-20 11:16 AM yes, a perfectly reasonable thing to do 06-Jan-20 11:17 AM ohhh yes 06-Jan-20 11:17 AM though I mean if anyone had infinite money.... 06-Jan-20 11:23 AM A nerd billionaire would totally do this 06-Jan-20 11:28 AM Most people: my dream house would have marble blah and gold plated blah Us: Conflat drains and swagelok water lines. 06-Jan-20 11:29 AM one positive would be if you needed to resolve a plumbing issue heh 06-Jan-20 11:29 AM I don't need a house I'll put a mattress in the closest accelerator 06-Jan-20 11:29 AM but connecting it and getting it all torqued right? a nightmare 06-Jan-20 11:30 AM Someone needs to machine a stainless toilet mount to conflat adapter just so such a thing exists 06-Jan-20 11:31 AM a true vacuum toilet 06-Jan-20 11:33 AM yea no more clogs 06-Jan-20 06:18 PM 1 minute till launcch! https://www.youtube.com/watch?v=HwyXo6T7jC4 07-Jan-20 03:32 AM XDDDDDDDDDDDDDDDDDDDDDD 07-Jan-20 05:54 AM in non-vacuum news, I have been working on putting shelves up in the living room... 07-Jan-20 05:54 AM https://media.discordapp.net/attachments/424015983414607872/664100763714191370/DSC_2908.JPG 07-Jan-20 05:54 AM need to get a few more and cut a few for the left and right of the TV 07-Jan-20 05:54 AM for displaying vacuum hardware, I hope 07-Jan-20 05:55 AM going to be two 16" height ones then one like 6" right where the top of the TV is so I can put front loading consoles then one or two to the left and right of the TV for probably top loaders and other equipment 07-Jan-20 05:55 AM hah nah for displaying computers and terminals 07-Jan-20 05:55 AM my other expensive and time consuming hobby 07-Jan-20 05:55 AM hehe 07-Jan-20 05:55 AM though conflat is much more expensive 07-Jan-20 05:55 AM honestly I've had computers more dense then some of the HV equipment I get through the door 07-Jan-20 05:55 AM like seriously, disk pack drives from the 80s 07-Jan-20 05:55 AM holy moly some of those are DENSE 07-Jan-20 05:57 AM back when they had stamped steel parts 07-Jan-20 05:58 AM stamped, haha 07-Jan-20 05:58 AM you mean cast right? 07-Jan-20 05:58 AM oh 07-Jan-20 05:58 AM voice coils in old pack drives can sometimes be MASSIVE cast iron cores with big voice coils attached to the heads 07-Jan-20 05:58 AM then one drive I have is a massive cast aluminum part with machined bits 07-Jan-20 05:58 AM that drive weighs about 300lbs~ 07-Jan-20 05:58 AM its got a linear supply in the bottom of it 07-Jan-20 05:58 AM so like 07-Jan-20 05:58 AM 300 lbs of aluminum and iron and copper, and capacitors :) 07-Jan-20 05:59 AM must have a high scrap metal value 07-Jan-20 05:59 AM :P 07-Jan-20 05:59 AM heh yea a lot of this stuff got scrapped long ago 07-Jan-20 05:59 AM some has lingered though :) 07-Jan-20 05:59 AM and has ended up in various basements across the US :P 07-Jan-20 01:54 PM Does any one use Cura for slicing 3d prints 07-Jan-20 01:57 PM i use prusaslicer bc it was the first thing i tried and it seems to work okay 07-Jan-20 02:02 PM I’m trying to change where my print starts and it’s being fussy 07-Jan-20 05:46 PM I don't understand what you mean 07-Jan-20 06:37 PM @mike crb If I guess correctly, you want to un-check this option here 07-Jan-20 06:37 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/unknown-950ED.png 07-Jan-20 08:33 PM https://media.discordapp.net/attachments/499873492477411339/664302573200867328/DSC_2909.JPG 07-Jan-20 08:33 PM https://media.discordapp.net/attachments/499873492477411339/664311966743134209/DSC_2910.JPG 07-Jan-20 08:33 PM shelves 07-Jan-20 10:44 PM pretty far off topic but this guy has some great videos: https://www.youtube.com/watch?v=k-g3efGa3sI 07-Jan-20 11:24 PM I have a sneaking suspicion that the neighbor upstairs got some kind of CNC router and is now playing with it 07-Jan-20 11:24 PM All I hear is resonance going up and down and the occasional "nyeoooooooooooo" as it does something (digs in way too much?). 08-Jan-20 12:23 AM Nice shelves you got there! 08-Jan-20 12:23 AM XDD 08-Jan-20 02:08 AM "Nickel is a naturally magnetostrictive material, meaning that, in the presence of a magnetic field, the material undergoes a small change in length.[68][69] The magnetostriction of nickel is on the order of 50 ppm and is negative, indicating that it contracts. " 08-Jan-20 06:37 AM welp, blew 2 PNP transistors trying out this random internet "improved circuit" 08-Jan-20 06:37 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/8izJN-E23BB.png 08-Jan-20 06:37 AM note to others, don't use that 08-Jan-20 07:07 AM Doesn't look right... 08-Jan-20 07:07 AM I think the transistors are backwards... 08-Jan-20 07:54 AM Also there is no collector over current protection for the driver transistors. You need to introduce some impedance there. Ballpark maybe 240 or 470 ohm depending on voltage of the supply. 08-Jan-20 12:01 PM https://www.waff.com/2020/01/07/police-feds-searching-truck-after-explosive-powder-stolen-huntsville/ dang...someone stole Kennametal's tungsten 08-Jan-20 12:02 PM whos tungsten? 08-Jan-20 12:03 PM they make carbide inserts and stuff 08-Jan-20 12:03 PM well now it's carbide stuff, before it was tungsten carbide 08-Jan-20 12:03 PM why would you steal tungsten 08-Jan-20 12:03 PM probably didnt know what it was? 08-Jan-20 12:03 PM it's not worth that much 08-Jan-20 12:03 PM and a pain in the neck to carry around 08-Jan-20 12:04 PM 24 x 17 gallons of tungsten must be an insane amount of weight too 08-Jan-20 12:06 PM yeah they must weight... a ton 08-Jan-20 12:09 PM the number i was getting from some online calculator did not really make sense...but i suppose tungsten powder is less dense/heavy than solid tungsten 08-Jan-20 12:09 PM still each 17gallon barrel probably is 1500-2000lbs if a solid 17gallon volume of tungsten weighs 2700lbs/1238kg 08-Jan-20 12:12 PM sooo... pretty heavy 08-Jan-20 12:12 PM I just still don't get why they'd steal it 08-Jan-20 12:13 PM probably just an unsecured trailer vs methheads 08-Jan-20 12:13 PM is that what people do nowadays, steal stuff first and then check if it's valuable? 08-Jan-20 12:14 PM if they are drug addicts, yes...they are suuuper destructive 08-Jan-20 12:14 PM couple people i know who work in construction have had 10s of thousands of dollars in damage done to jobsites to steal less than $1000 in scrap value of copper 08-Jan-20 12:14 PM anything not locked down they will steal and try to sell in some places 08-Jan-20 12:16 PM yikes 08-Jan-20 12:20 PM yeah...lower income rural areas in the USA are hit pretty hard by that the last 10 yrs 08-Jan-20 12:20 PM then anything in the south not rural 08-Jan-20 12:20 PM too bad because it is such a pretty part of the country 08-Jan-20 03:28 PM @Charles the output is a capacitor though, so minimal current should flow it seems, unless there was shoot-through 08-Jan-20 03:29 PM Many times have I killed transistors from cap discharge like that. Even a single microfarad can kill a junction. Also they are not shown in your schematic there 08-Jan-20 03:30 PM I meant the gate 08-Jan-20 03:30 PM The gate is a cap 08-Jan-20 03:30 PM I can only guess the base resistors aren't optimal for part to part variation 11-Jan-20 02:49 AM https://twitter.com/ToughSf/status/1215620304166252544 11-Jan-20 09:32 AM that is a crazy impressive little generator if it does 1MW and Honeywell is not exactly known to BS stuff 11-Jan-20 01:11 PM https://twitter.com/nixie_guy/status/1216067687388000259 11-Jan-20 07:36 PM Even more yeeeee: 11-Jan-20 07:36 PM https://twitter.com/nixie_guy/status/1216197284645523456 12-Jan-20 11:14 PM ok 13-Jan-20 06:06 AM half day thus far due to the 1cm of snow we got 13-Jan-20 06:06 AM will see if delayed/cancelled further 13-Jan-20 06:06 AM it hasnt even stuck to the roads, too warm 13-Jan-20 10:22 AM turned into an optional day 13-Jan-20 10:22 AM deciding if I want to test my bike out on the normal route or not.. the opposite bearing kinda ate itself last night, but I may have caught it in time.. did a test ride around the neighborhood, 1.5mi with one main hill and the descent, and it faired okay 13-Jan-20 10:22 AM may pickup a new spare rear wheel in the mean time while I wait for new bearings to arrive, as that was just a hack fix 13-Jan-20 10:56 AM Less than 1cm here in Renton 13-Jan-20 02:13 PM Nothing here in Hillsboro 13-Jan-20 02:13 PM It's such an insane joke to me that the PNW lowlands shutdown for a cm or two 13-Jan-20 02:13 PM In college in upstate NY, I don't remember school EVER being cancelled, even if there were like 2 or 3 ft outside 13-Jan-20 03:01 PM I grew up in the midwest where we got pretty nasty winter weather, but the land was flat as a pancake. Around here in Puget Sound, you can't really go very far before you start hitting hills > 10% grade. It complicates things. 13-Jan-20 04:08 PM hah, those bearings are toast... 13-Jan-20 04:08 PM also, getting a new-to-me full PTFE vacuum pump tomorrow, for chemistry 13-Jan-20 04:08 PM if rigged in series (it is a parallel version) I should be able to get 10 torr 13-Jan-20 06:57 PM @Noxz was it that eBay mdp pump? 13-Jan-20 06:57 PM @piGuy i grew up in sw PA, lots of steep hills... I guess maybe I'm just too biased 13-Jan-20 07:13 PM It was ebay, dunno what mdp is.. It's a KNF 13-Jan-20 07:13 PM Multi diaphragm pump? 13-Jan-20 11:31 PM MDP was some model code in a recent pump mentioned around here 14-Jan-20 01:41 AM <__ice9#6039> I have one of these ^^ 14-Jan-20 01:41 AM <__ice9#6039> It's so so so good 14-Jan-20 01:41 AM <__ice9#6039> Run it in series; it's super powerful 14-Jan-20 01:41 AM <__ice9#6039> You won't need parallel unless you are using some crazy huge 100L flask 14-Jan-20 01:41 AM <__ice9#6039> I have accidentally sucked all kinds of horrible substances into it already and just... nothing fazes it. Acid vapors, random halogenated solvents, sublimed stuff that crystalized onto the walls of the tubing, etc. Just rinse it out from time to time and avoid any incompatible contamination (nitric acid and organic solvents being one of the more obvious ones) and it's good as new. Built like a tank too. The one I bought had obviously been kicked around a lot, but I just swapped out the broken interstage connection with PTFE tubing and PFA fittings, wired up a new power cord with FEP insulated wiring because it seemed fitting, replaced one of the anti-vibration pads, and it worked as advertised. 14-Jan-20 01:41 AM <__ice9#6039> It makes vacuum filtration and vacuum distillation much much faster than they were with my older diaphragm pumps. Both the pumping rate and the final vacuum achievable are substantially better than any other diaphragm pump I had used previously 14-Jan-20 01:41 AM <__ice9#6039> KNF Laboport Un726.3FTP 14-Jan-20 01:41 AM <__ice9#6039> Pretty much the only thing that could actually destroy it chemically is NaK alloy or some other molten alkali metal 14-Jan-20 01:41 AM <__ice9#6039> It seems to run slightly quieter if I drip a tiny bit of low viscosity PFPE oil into each cylinder, but I don't think it actually matters much one way or the other. Just trying to take care of it mechanically. It's pretty much indifferent to anything that gets thrown at it chemically. 14-Jan-20 01:41 AM <__ice9#6039> It works especially well if you use an aspirator as a backing pump for it-- then you can spare your fume hood enclosure/fans/etc from most of the burden of exposure to whatever vapors you are pumping off 14-Jan-20 02:00 AM Lol, down the drain! 14-Jan-20 02:00 AM <__ice9#6039> Yeah exactly lol 14-Jan-20 06:29 AM my previous series pumps got some DMF sucked through and ti was a pain to clean up, was not PTFE.. mad emy own PTFE head gaskets for them after tthat, but the diaphragm was still a standard rubber, this one will be nicea, nd yeah, a 726.3ftp 14-Jan-20 06:38 AM ice9, nice to know others here do some higher level chemistry.. not atomic level stuff 14-Jan-20 06:38 AM I never had setup an aspirator before as I never had running water close enough to my large fume hood (home built).. but my exhaust system for it was rather impressive if I do say so myself 14-Jan-20 06:38 AM when I finish up school (havent unpacked any of the lab stuff since moving) and move back, I'll setup a "proper" chem lab space 14-Jan-20 06:38 AM I've also been going back and forth if I want to buy a house or just tr y to setup at the art studio that I still have back home.. t hey'll have a space available, but I dont know if it will be big enough for verything that I need to do 14-Jan-20 06:38 AM they do already have 3ph power though, that's a plus 14-Jan-20 08:46 AM nice 14-Jan-20 01:53 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/DSC_0928-DA5DE.JPG 14-Jan-20 01:53 PM motor works, creates suction , will test vacuum via water distillation test once it warm up to room temperature 14-Jan-20 01:53 PM then string it for series 14-Jan-20 01:53 PM may need some hardware for that 14-Jan-20 03:17 PM A guy sitting next to me in the library is making a peanut butter and jelly sandwich. He brought in a loaf of bread and a jar of peanut butter and a knife and everything. I just saw it out of the corner of my eye and thought maybe he was doing something sketchy like some sort of drug thing, but then I looked and he was making a sandwich. 14-Jan-20 03:39 PM @Noxz I've been studying clock repair with my kid... I'm not sure we have the best textbook though 14-Jan-20 03:39 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/JPEG_20200114_153747-6FFF3.jpg 14-Jan-20 03:39 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/JPEG_20200114_153804-BBC6A.jpg 14-Jan-20 03:39 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/JPEG_20200114_153833-F72EC.jpg 14-Jan-20 03:40 PM hah, cute 15-Jan-20 04:42 AM <__ice9#6039> 3-phase is a luxury in the U.S. definitely 15-Jan-20 04:42 AM <__ice9#6039> Ah yeah, same one ^^ yours is in much better shape cosmetically haha 15-Jan-20 04:52 AM <__ice9#6039> Yeah designing the fume hood was a lot of fun-- hilariously, the amount of recent interest in marijuana growing in the U.S. has created a lot of demand for little vapor-tight rectangular collapsible enclosures, high-flow ducted fans, carbon filters amenable to further filler additions, rigid ducts I was able to use for packing with other particulate filter media and sorbents and photocatalysis media+lamps, duct extensions to dump anything left out the window, etc. Made the rear baffles from coroplast and the floor liner from several layers of thick folded PTFE sheeting that extends up the walls. Front sash is silica-coated polycarbonate sliding in aluminum u-channels. Was able to confirm effective laminar flow through the sash with propylene glycol fog and a laser pointer. 15-Jan-20 04:55 AM nice 15-Jan-20 04:57 AM <__ice9#6039> When I rebuilt my KNF Laboport pump, I used 1/4 NPT to 1/2" compression PFA elbow fittings and 12mm PTFE tubing to bridge the series connection between the two pump heads. Then I just stuck PFA hose barbs on the input and output side to make it easy to add/remove hoses to chambers/flasks/etc and wherever it is venting to. The PFA hardware is costly new but very cheap if you find it on eBay from a surplus dealer 15-Jan-20 04:57 AM <__ice9#6039> I like FKM hoses the best, but they are expensive so I only have a few lengths of them. But the thick-walled rubber 'vacuum' tubing is ok as well. The normal kind and most silicone tubing will collapse if used with this pump, unlike with weaker diaphragm pumps 15-Jan-20 04:57 AM <__ice9#6039> Tangentially: if you take a piece of 12mm PTFE tubing, cut the plastic barb off a fishtank bubbler in the smallest size on Amazon (fritted alumina) and drill out the glue and grind off the glue on the edge, jam the fishtank bubbler into the tubing, and wrap the edge of the tubing against the bubbler in PTFE tape, you get a vastly better gas bubbler than the glass ones with holes poked in them, and more durable and a lot less fragile than the rigid glass frit ones. 15-Jan-20 04:57 AM <__ice9#6039> It works much more effectively for dissolving gases in solutions, washing gases, drying gases in sulfuric acid, etc. (for gases not suitable for just using zeolite 3A anyway) -- speaking of which, water filter housings are ideal for making gas treatment tubes full of activated carbon, silica gel, zeolite, etc for gas-extraction/generation/purification/etc devices 15-Jan-20 05:30 AM <__ice9#6039> Another chemistry hack: much nicer to use a 'reactor' style flask with a removable lid if making a solid, e.g. salt metathesis, solid phase displacement (like Cl2+2NaBr->2NaCl+Br2), etching objects in hot strong acids, etc. -- easier to get stuff out afterward. For the gasket, just buy a large FFKM o-ring surplus at least as big as the reactor Schott flange, cut to size, reattach ends with FEP heat shrink tubing, lubricate with Krytox. This replaces $200-400 new exact-size FFKM gaskets with random $15 surplus ones with no loss of sealing or chemical resistance. The main trade-off vs. a normal flask is a 260C limit at the gasket (vs boro ~500C, Vycor ~900C, quartz ~1200C). 15-Jan-20 05:30 AM <__ice9#6039> @nmz787 I recently won an antique watch I planned to use as platinum electrode material for like half the scrap value, but when I got it, it was actually working and too pretty to destroy x____x 15-Jan-20 05:42 AM <__ice9#6039> Heating mantles for oversized objects like reactor flasks can be made from ceramic wool, a steel bowl, and a Kanthal/nichrome heating element shoved into a fiberglass sleeve, then just rigidize the ceramic wool with dilute sodium silicate, dry in oven at 90C a few hours, and bake out at 200C a few more. Tired of puny 400W mantles? A 3000W nominal 220V heating element yields over 900W at 125V and will never fail. If you box up an SCR controller and a PID temp controller with a thermocouple, run the output to a decapitated mini extension cord, and use the glass-tube-style ground-glass thermometer fittings instead of the slide-through ones to protect the thermocouple, you can control any given heating mantle directly based on temperature of flask contents at variable power. 15-Jan-20 05:51 AM <__ice9#6039> Idk this is maybe more budget oriented than common here but hopefully useful to someone else 15-Jan-20 05:57 AM Lol, and I can't even heat an acorn nut with a Watt without this stupid mosfet or buck converter getting hot :/ 15-Jan-20 05:57 AM Finally got gate drivers hooked up, and a proper schottky diode for freewheeling.... Seems like power supply was browning out and I don't seem immediately capable of calculating how much farads I'd need to prevent it 15-Jan-20 05:57 AM Turned the voltage down to 1V using a little buck converter from Amazon...at 0.4 ohms that should be 2.5A and 2.5W 15-Jan-20 05:57 AM Buttt the inductor and converter chip then got pretty hot 15-Jan-20 05:57 AM So I guess the boards inductor/resistor values aren't optimized for this low of voltage and high of current 15-Jan-20 05:57 AM (chip says it's rated for 3A) 15-Jan-20 05:57 AM At this point using my big linear lab bench supply would've been less work...i guess less learning too though 15-Jan-20 06:23 AM Is the chip rated for 1V output? 15-Jan-20 08:49 AM The North Seattle College campus will be closed on Wednesday, Jan. 15, due to icy conditions. All classes, including evening classes, and all campus activities are canceled. Campus services and offices will be closed. 15-Jan-20 12:12 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/FB_IMG_1579118997954-B741E.jpg 15-Jan-20 12:12 PM Would Y'all do it? 15-Jan-20 12:14 PM hahaha I have some days where I just might 15-Jan-20 12:32 PM @rfs yeah, down to 0.8v... I think the problem is the switching frequency must not be optimal, since it was sold as a variable output module, but the datasheet doesn't indicate that as any example circuit 15-Jan-20 12:32 PM So presumably with how it's configured, it's better suited for more common voltages, i.e. 5-12 or something 15-Jan-20 12:33 PM That and the inductor might not be optimal 15-Jan-20 12:33 PM Gonna try to reverse their layout and see if I can swap components 15-Jan-20 12:33 PM Maybe calculate the optimal parameters from the datasheet and see how far off you are 15-Jan-20 12:33 PM But ugh, wish it just worked 15-Jan-20 12:33 PM Yeah 15-Jan-20 12:36 PM 1Volt is an uncommon output voltage for most common SMPS things 15-Jan-20 12:36 PM I'd genuinely consider cutting up some old or semi-dead GPU and using/hacking it's GPU core VRM for that 15-Jan-20 12:36 PM Beefy GPU can so something like 100A 1.2V 15-Jan-20 12:36 PM from 12V input 15-Jan-20 12:39 PM Hmmmm 15-Jan-20 12:39 PM That sounds maybe a lot easier than simple arithmetic 15-Jan-20 12:39 PM Since I'm generally tired (from toddler) and already mentally stretched thin 15-Jan-20 12:43 PM It would likely require hacking in an arduino or something else to control the VRM controller 15-Jan-20 12:43 PM or at least reading some datasheets 15-Jan-20 12:43 PM But It's something I should try one of these days with some old +200W dumpsterdived beast 15-Jan-20 12:44 PM Goodwill around here commonly has GPUs, so maybe worth a shot 15-Jan-20 12:45 PM Modifying the module might be easier. 15-Jan-20 12:45 PM I think I need to learn how to calculate why pulsing 12V was browning out, and if I can add a bigger capacitor to allow pulsing the 30A (12v/0.4ohm==30A) 15-Jan-20 12:45 PM Then additionally try to figure out better r/l/c for the buck module 15-Jan-20 12:45 PM Since dealing with pulsing 1V 2.5A inherently means I'll have less inductive ringing than 12V 30A 15-Jan-20 01:22 PM Haha, well digikey has some supply modules that are 1V outout... ordered a 3A and 10A version 15-Jan-20 01:34 PM snow started up again 15-Jan-20 01:56 PM aaand another tree fell in the creek by my house, is now being supported by the tree of which part of it fell on my house last year 15-Jan-20 02:14 PM appears mostly in the clear, but it is being actively supported, so who knows 15-Jan-20 02:15 PM <__ice9#6039> @nmz787 try just sticking heat sinks on the buck converter. A lot of cheap Shenzhen boards are under-heat-sinked. 15-Jan-20 02:15 PM <__ice9#6039> Ah yeah 1V is unusually low for most of these 15-Jan-20 04:03 PM 100 amps at 1.2 volts and doing it smps? Wow. Is this like a anti corrosion system on a ship? Those used to have numbers like that 15-Jan-20 04:10 PM @Charles I only need 1V 1A... but the recommendation was that I could try grabbing a voltage regulator from a graphics card, since the CMOS voltage is usually in the 1V range, and the GPUs are often 100s of watts 16-Jan-20 12:54 AM Not really grab, more like solder wires TO a scrap graphics card 16-Jan-20 12:54 AM older designs have less annoyingly custom parts. 16-Jan-20 02:37 AM http://amasci.com/weird/unusual/e-wall.html 16-Jan-20 08:44 AM https://fusor.net/board/viewtopic.php?f=20&t=13170#p85588 Big oof 16-Jan-20 08:46 AM internally screams 16-Jan-20 08:46 AM Woah 16-Jan-20 08:47 AM Might also draw analogy with x-ray exposure as a patient vs every day for clinical staff. 16-Jan-20 08:47 AM this guy... 16-Jan-20 08:47 AM Will wear a dust mask next time. 16-Jan-20 08:47 AM NO BERYLLIUM WILL NEVER LEAVE YOUR BODY 16-Jan-20 08:47 AM yea that just made me die 16-Jan-20 08:47 AM not just you 16-Jan-20 08:48 AM Lots more mercury metal than I need. 16-Jan-20 08:48 AM this guy probably already has mad hatters 16-Jan-20 08:48 AM so like yea just yikes 16-Jan-20 08:48 AM super uber yikes 16-Jan-20 08:51 AM That's the fusor forum ™️ for 'ya 16-Jan-20 08:54 AM Nice beryllium window on a proportional counter that has leaked over time 16-Jan-20 08:54 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/JPEG_20200116_115336-D1805.jpg 16-Jan-20 08:54 AM But since I don't have anything that needs it atm I will not mess around with it yet 16-Jan-20 08:54 AM not as nice as that like 48" round berrylium window I had found on ebay 16-Jan-20 08:54 AM that thing was nuts 16-Jan-20 08:54 AM sorry like 14" lol 16-Jan-20 08:55 AM Uhh I don't need large ones, but thin ones 16-Jan-20 08:55 AM I need to eat food 16-Jan-20 08:55 AM https://www.ebay.com/itm/Giant-Beryllium-metal-window-14-40cm-clear-aperture-with-high-vacuum-conflat/124034901655 16-Jan-20 08:55 AM hopefully without any Be in it 16-Jan-20 08:55 AM Oof the price 16-Jan-20 08:56 AM lol @GigaSquirrel yea without Be 16-Jan-20 08:56 AM I guess it's reasonable given the size 16-Jan-20 08:56 AM but yea I need a replacement for my EDS myself 16-Jan-20 08:56 AM Adam got me a source for like 400-800 bucks depending on what I need 16-Jan-20 08:56 AM but I just... yea... money 16-Jan-20 08:56 AM priorities 16-Jan-20 08:56 AM stuff 16-Jan-20 08:56 AM have you tried aluminized mylar? 16-Jan-20 09:02 AM that'll hold up to vacuum and let like itty bits of xrays through? 16-Jan-20 09:02 AM .-. 16-Jan-20 09:02 AM I would think mylar would seep vacuum pretty quickly 16-Jan-20 09:03 AM I don't know 16-Jan-20 09:03 AM I know canberra uses mylar on some of their HPGes, so it can't be that bad 16-Jan-20 09:03 AM but I don't know about garden variety alpha foil 16-Jan-20 09:03 AM ah, not sure if mylar they only say "polymer" 16-Jan-20 09:03 AM they warn about helium permeation 16-Jan-20 09:08 AM I just know the berylium windows on the EDS they have slots cut down to make the berylium thin enough to bend in under the vacuum 16-Jan-20 09:08 AM its like... really really really really thin 16-Jan-20 10:37 AM It won't hold vacuum @GigaSquirrel 16-Jan-20 10:37 AM BUT 16-Jan-20 10:37 AM There do exist polymer windows 16-Jan-20 10:37 AM There's a company that makes nearly "indestructible" SDDs with polymer windows 16-Jan-20 10:37 AM I believe they use a lattice underneath 16-Jan-20 10:38 AM To take full advantage of the low energy response of the Ultra-LEGe, Canberra offers the option of a polymer film cryostat window. This polymer window is a multilayer film which is supported by a ribbed silicon support structure. The film spans silicon ribs that are about 100 microns apart and 0.3 mm thick and act as a collimator accordingly. On horizontal cryostats, the support rib orientation can be chosen by designating the appropriate window model-number suffix: V for vertical ribs and H for horizontal ribs. The support structure is 80% open so the effective detector area is reduced by 20% from the total area. The total film thickness is about 3400 Å, 400 Å of which is an aluminum layer which reduces sensitivity to ambient light. Detectors having polymer windows must be operated in a darkened environment, nevertheless. 16-Jan-20 10:38 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/unknown-1EBCE.png 16-Jan-20 10:39 AM Ah yes yes 16-Jan-20 10:41 AM what happened to that effeciency curve lol 16-Jan-20 10:41 AM is that just magic physics unexplainable by current science stuff going on? 16-Jan-20 10:41 AM Also I know I have some dyslexia and would totally mis-spell something as simple as science but... wth discord 16-Jan-20 10:41 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/unknown-88E74.png 16-Jan-20 10:43 AM Just x-ray attenuation in matter, the attenuation coefficient is energy dependent 16-Jan-20 10:43 AM ahhh 16-Jan-20 10:43 AM ok 16-Jan-20 11:05 AM https://i.spirit.re/JiRbO.png 16-Jan-20 11:05 AM I may have... bought... things 16-Jan-20 11:05 AM (these are all mostly cheap crap but still) 16-Jan-20 11:06 AM Which service do you use for board assembly in China? 16-Jan-20 11:06 AM "use" is a broad term - this is my first time trying them, but it's PCBWAY 16-Jan-20 11:06 AM They gave me a reasonablish quote 16-Jan-20 11:06 AM JLCPCB is a lot cheaper if they have the parts 16-Jan-20 11:06 AM (they didn't for my order) 16-Jan-20 11:08 AM Yeah I've heard of JLCPCB before 16-Jan-20 11:08 AM JLCPCB also have a Chinese-only version that seems to have a lot more parts 16-Jan-20 11:08 AM Or not even Chinese-only, it's like Shenzhen and HK only 16-Jan-20 11:08 AM Yeah, it's the place all EE students go to in Hong Kong 16-Jan-20 11:08 AM Super fast lead times from what I've heard 16-Jan-20 11:09 AM They are 16-Jan-20 11:09 AM They want to do good and be the best/cheapest fab, however their philosophy is a bit bad 16-Jan-20 11:09 AM In that it's "let your users be the beta testers" 16-Jan-20 11:09 AM When I tried to assemble this simple board on jlc, using parts only from the jlc catalog, the assembly service was missing half of their own parts 16-Jan-20 11:10 AM Umm which simple board? The laser driver or the servo driver? 16-Jan-20 11:11 AM laser driver 16-Jan-20 11:11 AM the servo driver is NOT simple or cheap 16-Jan-20 11:11 AM Like $40+ ea? 16-Jan-20 11:11 AM yeah 16-Jan-20 11:11 AM well, in prototype prices anyway 16-Jan-20 11:11 AM in production it'd be around $25 16-Jan-20 11:33 AM Yay, I found a source of neon 16-Jan-20 11:33 AM $100 for 10 liters in a single use disposable can... :( 16-Jan-20 11:33 AM Maybe @ZeptoBars knows someone else in Moscow? :P 16-Jan-20 05:43 PM I use JLC now for our small batches. Have not had a single dud yet. 17-Jan-20 06:38 AM https://twitter.com/LilithLovett/status/1217630046900240384 17-Jan-20 06:38 AM Just this but beryllium oxide instead right? @GigaSquirrel 17-Jan-20 06:40 AM close, he's not leaving enough dust / shards behind 17-Jan-20 06:47 AM Oh I am sure he is with those sounds 17-Jan-20 05:31 PM https://imgs.xkcd.com/comics/tattoo_ideas.png 17-Jan-20 05:31 PM That EURION Constellation tattoo would be amusing. 18-Jan-20 11:49 PM <__ice9#6039> Are there any discords for high-temperature processing / furnaces / ceramics / materials science? I seem to enjoy this quite a lot and it tends to be a bit off-topic here. I just came up with an idea to cast a very thick pressure vessel out of CA-6N for doing cold isostatic pressing with water ice and wanted to run a few ideas by people with more experience. 19-Jan-20 09:14 AM not something i have any experience with at all but why would you want to cast a pressure vessel when there are likely other options? castings are one of the least consistent production methods in my experience... 19-Jan-20 02:32 PM On Silicon Overlords some make furnaces, but the chat is very quiet, so I'm not sure you could get many answers. What temps do you need? 20-Jan-20 09:27 AM I only have experience building quartz tube furnaces for reducing atmospheres. Not what you are looking for but if anybody else in interested I will post some photos. 20-Jan-20 11:24 AM I'm interested. I plan to build a tube furnace and a run-of-the-mill furnace for metal casting (though if I can manage reasonable costs I'd like to be able to cast borosilicate mirror blanks which would require ~950 C) 20-Jan-20 11:24 AM @__ice9 please do share any discord servers you find 20-Jan-20 11:24 AM I also want a muffle furnace but those seem cheap enough second hand that it makes best sense to just purchase 20-Jan-20 12:01 PM 950 C is within range of quartz tube with a kanthal heating element wrapped around it and then covered with an inch of ceramic wool. 20-Jan-20 12:01 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/image0-724FC.jpg 20-Jan-20 12:01 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/image1-82AA7.jpg 20-Jan-20 12:01 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/image2-0DC85.jpg 20-Jan-20 12:01 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/image3-120D1.jpg 20-Jan-20 12:01 PM https://www.budgetcastingsupply.com/product-p/7101-001.htm 20-Jan-20 12:01 PM I have some nickel boats coated in magnesium oxide and use a steel stick with a bend in the end to push in and pull out the boats. At 950 though I would consider using graphite boats as if left in too long the nickel boats might start to stick to the quartz tube. 20-Jan-20 12:01 PM Oh. And never never never put anything in that is alloyed with aluminum in any size able amount. With the reducing atmosphere it’s just all bad and at the very least you will wind up with a cracked tube. At the worst it will turn into a million flying pieces! 20-Jan-20 12:11 PM for the 950 I don't need a tube, just a kiln-type situation. Would be dealing with things in the 10's of inches diameter in that case as well so just a different application than the tube furnace anyhow 20-Jan-20 12:11 PM wasn't aware of the aluminum issue - what's the process/cause behind it? any idea? 20-Jan-20 12:26 PM cursory research says you'll wind up with aluminum hydride if using a hydrogen atmosphere which is pyrophoric, so that'd be an issue for sure 20-Jan-20 12:26 PM or perhaps just a coating of material with a large difference in thermal expansion coefficient? 20-Jan-20 02:26 PM It was explained to me that the metallic aluminum without its oxide layer attacks the silicon in the quartz tube and creates a spot of differing expansion coefficient and instant crack. My actually experience seems in line with that. 20-Jan-20 02:26 PM Aluminum without its oxide is pretty scary stuff! 20-Jan-20 07:16 PM made food.. 20-Jan-20 07:16 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/DSC_0940-0A1C4.jpg 20-Jan-20 07:16 PM stuffed chicken breast 20-Jan-20 07:16 PM + couscous 20-Jan-20 08:03 PM Yum 21-Jan-20 12:50 PM So interesting factoid: All of the dumpsters at Colgate seriously smell like mint toothpaste 21-Jan-20 01:16 PM lol 21-Jan-20 01:16 PM I wonder why 21-Jan-20 01:19 PM XD 21-Jan-20 05:55 PM https://twitter.com/CM_Hedge/status/1219678224013086720?s=20 21-Jan-20 05:55 PM yikes 21-Jan-20 06:01 PM too bad they didnt scrape a little off and try to ID what ate the copper out of the pipes 21-Jan-20 09:57 PM I was gonna say I think you are looking at the pipes slowly migrating away. I also see at least three different pipe materials there in just the drain alone. 21-Jan-20 11:30 PM Well I've finally memorized my main credit card's number... I hadn't been storing my number in eBay for security and to reduce impulse buys... But I guess the latter reason is gone now 21-Jan-20 11:30 PM At least this card expires soon enough 22-Jan-20 01:06 AM <__ice9#6039> >not something i have any experience with at all but why would you want to cast a pressure vessel when there are likely other options? castings are one of the least consistent production methods in my experience... Because that way it is possible to make the walls e.g. 35mm thick and avoid having any seam between the sidewalls and the bottom plate. Both are very difficult with prefabricated pipe sections, even the heaviest grades. Note the load pressure would be ~2000 bar. Since writing that comment, I've found a wide variety of additional high tensile strength castable alloys, mostly heat treated martensitic steels. The alternative would probably be a very very long and arduous milling run costing $$$$ or possibly wire EDM (but that would only make a tube section as well...). 22-Jan-20 01:06 AM <__ice9#6039> Many casting issues can be addressed by (a) sparging the melt heavily with argon, (b) argon cover, (c) correct choice of crucible to prevent contamination, (d) mold preheat, (e) reticulated zirconia pouring filter. It would be nice to have a gamma imager capable of looking through steel that thick, but unfortunately I don't think that is likely to happen. So designing with a large safety factor and using an incompressible medium in a freezer instead of gas in the open would help mitigate potential safety risks. 22-Jan-20 01:06 AM <__ice9#6039> @LRM what would you suggest for fabrication? Figure e.g. 75mm outer radius, 35mm wall thickness, 250mm outer length, preferably seamless base (slightly rounded internally, flat externally), 35mm thick upper flange with 10-12 3/4" or 1" holes for structural bolts, upper lid 35mm thick or so. Not sure about gasket yet. The only practical method I see here is casting. Forging would require enormous equipment, milling high costs and waste and very very tedious. 22-Jan-20 01:23 AM <__ice9#6039> @Nixie I'm interested in sintering zirconia, making glassy carbon and graphite objects, etc. I have an 1100C tube furnace, a 1400C top loading cylindrical furnace, and a 1400C side loading box furnace with zirconia inner insulation. I am hoping to upgrade the latter to more exotic heating elements if a current experiment with shielded tungsten sealed elements works I am currently building an argon shielded 15kW induction melter with a zirconia crucible holder-- which is almost done and mostly just waiting for the Mac Pro case I ordered to put it in. (Incidentally the ones on Amazon are fake, only 7.5kW based on power draw information from reviews.) Next small one will probably be a graphite insulated tungsten wire heated argon furnace to try for 2500C or so. I also have an ebeam PVD system partway done, but that's a very very lengthy project-- the power supply is close to being done and the stage and chamber are present, but the chamber lid and stage filament holder and cooling loop and rotation motor aren't ready yet, and the controller needs a lot more work. 22-Jan-20 01:32 AM <__ice9#6039> I also like welding technology. I have a pretty wide variety of different kinds of torches and power supplies. My most recent project has been making a quick clamp-on baffled pass-through to put a TIG torch in a low vacuum chamber and wiggle it around as needed for autogenous welds and remelting. Not really sure how to feed in a filler rod atm though. Can consider that later. 22-Jan-20 01:32 AM <__ice9#6039> @Charles yeah I usually use quartz tubes in my tube furnace. The actual linear is alumina but I try to keep it clean. I want to try coating aluminum with the recent MIT ultra-black coating I've posted about on Twitter at some point, but I may need a better metered gas mixing device to do that. 22-Jan-20 01:41 AM <__ice9#6039> @Metanoic 950C is easily hittable with Kanthal or even nichrome elements, Kaowool, and a bit of refractory cement over the Kaowool for protection. For control, I like using PID controllers with type K thermocouples below 1360C, type S to 1600C. In vacuum/argon, W-Re type C is best. 22-Jan-20 01:41 AM <__ice9#6039> Use an SSR with the controller 22-Jan-20 01:42 AM that is a bit larger than i was expecting. you probably are better off with casting if you can find someone who can do it at a decent cost 22-Jan-20 01:42 AM would also be doable on a large lathe but you would probably need to have access to it to work on that yourself instead of paying someone for their time 22-Jan-20 01:42 AM <__ice9#6039> Hmm also your quartz tube will thank you if you put a thin layer of ceramic wool sheeting or alumina between the coil and the tube-- but it doesn't matter hugely 22-Jan-20 01:43 AM Yea I figured PID and solid relay to start. I keep moving my own goalposts and need to just stop, lol. If I'mma do 950 might as well try 'n melt steel so let's get some moly di lol 22-Jan-20 01:44 AM <__ice9#6039> I agree about bare aluminum btw 22-Jan-20 01:44 AM yea on the tube furnace I was figuring I would use bricks and basically line-bore through and slip 'er in 22-Jan-20 01:44 AM trying to find the page/project, probably was on hackaday.. one guy rigged up a nice little line boring jig to do exactly 22-Jan-20 01:49 AM <__ice9#6039> Hilariously, you can make graphite foam insulation by turning bread into charcoal. This is not merely a troll suggestion-- sugar charcoal is among the purest of bulk commodity carbon media. Carbon felt can meanwhile be made by turning viscose rayon felt into charcoal. Don't use acrylic felt obviously. 22-Jan-20 01:49 AM basically just bored through/between two stacked refractory blocks leaving a half circle to each and hinged 22-Jan-20 01:49 AM I've seen that! lol 22-Jan-20 01:50 AM <__ice9#6039> @LRM I am planning to just cast it myself. Also yeah that would be an enormous lathe and I really dislike the idea of turning like a liter of steel into chips x____x 22-Jan-20 01:51 AM that is a pretty big casting to do at home, especially in steel! good luck and please take photos along the way 22-Jan-20 01:53 AM <__ice9#6039> @Metanoic MoSi2 is really brittle and easily destroyed; also extremely low and highly variable resistance makes PSU design... difficult. Think about like a 300A buck converter. And much sadness if the elements ever touch.. pretty much anything at any time. Honestly I might almost suggest SiC, even given its aging issue. More relevant to commercial users. Or flames. 22-Jan-20 01:53 AM are you set up to heat treat something that big too? or just not planning to do that? 22-Jan-20 01:54 AM <__ice9#6039> Yeah line boring low density 3000F firebricks is probably the superior choice-- either that or if you can find a big wide alumina tube to coat with cement and wrap the element around. 22-Jan-20 01:54 AM <__ice9#6039> Heat treating it is much easier and can be done in my side loaded furnace. 22-Jan-20 01:54 AM <__ice9#6039> The initial melt and pour are the harder parts. 22-Jan-20 01:54 AM <__ice9#6039> Am thinking of making a dedicated pouring furnace for it-- sealed elements around a central oversized crucible, actual melt crucible sits inside that, argon supply from the top and into the melt through a drilled alumina tube. Alumina spout along the upper flange. Tilt to pour straight into the mold, preheated with Kanthal wrapped around it under Kaowool. At least that's the idea. 22-Jan-20 02:00 AM your electricity bill must be massive, please do make sure you take photos of the casting process! 22-Jan-20 02:01 AM <__ice9#6039> Need to do more experiments with sealed elements though. Am beginning to believe they might actually be a viable alternative to MoSi2 for short term use. I have 180 meters of 4% thoriated tungsten 0.25mm and 50m 2% 0.4mm 22-Jan-20 02:01 AM <__ice9#6039> 15kW * 8 hours * 0.12 = $18 ^^ 22-Jan-20 02:02 AM the largest thing i have experience heat treating was something about 6in x 4in x 3in and it required a lot more water to get a proper quench than i was expecting, had to basically fill up a whole garbage can 22-Jan-20 02:02 AM <__ice9#6039> Lollllll 22-Jan-20 02:02 AM not something i plan to agree to take on again 22-Jan-20 02:05 AM <__ice9#6039> I made a capacitive spot welder for welding the tungsten wire to things as well (e.g. shielded feed wires or just thin TIG electrodes) but it still ended up needing shielding; cooling is still too slow to prevent oxidation in open air. It does work. 22-Jan-20 02:05 AM <__ice9#6039> At temperatures beyond what silica can handle, thick high density sintered or fused alumina is the next best gas shield 22-Jan-20 02:05 AM <__ice9#6039> Packing the tube with stabilized zirconia powder by analogy with MgO in oven elements as well to further reduce propagation of any gas seepage. 22-Jan-20 02:05 AM <__ice9#6039> Sintered zirconia is actually a pretty mediocre gas barrier, but for merely taking up internal space and not causing thermal stress to the tube it is acceptable as powder 22-Jan-20 02:05 AM <__ice9#6039> Tangentially: Kanthal is solderable with sanding beforehand and use of silver-bearing solder and inorganic stainless steel flux (Cl+F) 22-Jan-20 02:05 AM <__ice9#6039> Nasty stuff but does the job 22-Jan-20 02:05 AM <__ice9#6039> So you just stretch out the ends of elements to reach through the insulation and solder them to thick copper cables with silicone insulation. More reliable than twisted wire connections because it doesn't allow oxide formation at the interface. 22-Jan-20 02:05 AM <__ice9#6039> Twisting for like 20cm against some thicker Kanthal to use as a cooler power feed wire also works though 22-Jan-20 02:05 AM <__ice9#6039> For tungsten, this isn't so simple. Tungsten is very brittle below 150C for instance, and the final-stage interface temps are too hot for soldering. So am trying welding based on what others in the literature have done. 22-Jan-20 02:05 AM <__ice9#6039> Can't just route it all the way out of the furnace as tungsten either, oxidizes. So planning: weld tungsten wire to thin TIG electrode to exit sealed tube and reach through inner layers of insulation, twist Kanthal around end of electrode and weld repeatedly (possible with spot welds), coat+seal TIG electrode, Kanthal exits at temps below 1500C. I think this should work. But will see. If it works, it will be a new alternative to MoSi2 and should easily surpass SiC. 22-Jan-20 02:05 AM <__ice9#6039> Btw if you want zirconia, Graystar is the best supplier 22-Jan-20 02:05 AM <__ice9#6039> Bubble zirconia is particularly wonderful stuff 22-Jan-20 02:05 AM <__ice9#6039> If you are making castables, go for the 325F calcia stabilized powder as your base material and add a few percent quicklime and about 0.5-1% fumed silica 22-Jan-20 02:05 AM <__ice9#6039> That's the best recipe I've come up with that doesn't need organic binders 22-Jan-20 02:05 AM <__ice9#6039> You can also add about 0.1% trisodium phosphate or similar agents to make it flow more smoothly with less water content, which results in a stronger casting and reduces curing time and cracking risks 22-Jan-20 02:05 AM <__ice9#6039> For sintering, micronized yttria-stabilized zirconia is best. Pressing helps and some additives can reduce sintering temps a bit, but I have less direct experience so far because I need to hit higher temps to run it. 22-Jan-20 02:05 AM <__ice9#6039> For making solid fused alumina or zirconia, microwave skull crucible methods are probably the most accessible, using a starter made of aluminum or zirconium wire or similar, but porosity is often problematic. Liquid phase settling of the material should help. Pressing would help more. For thoria, though, the only thing I have personally confirmed working is flash sintering at about 800V/cm at 900C, but it seems likely that pressing will also be necessary as the interface to the containing structure otherwise causes cracking 22-Jan-20 02:58 AM Good info @__ice9. Any recommendation on source for firebricks and kaowool (I'm in the US)? I've got a buddy who wants a casting furnace as well so we're gonna make a weekend out of it and about ready to start gathering materials. 22-Jan-20 02:58 AM I've contemplated trying to do a muffle furnace as well but second hand prices are so reasonable especially if you don't need high temps. My want/project-goal is sintering PZT on that end. 22-Jan-20 03:08 AM <__ice9#6039> Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/1579691324143-2D3E8.png 22-Jan-20 03:08 AM <__ice9#6039> I use this stuff as external insulation. Superwool Plus has low biopersistence-- though you should still wear a mask and gloves when cutting it. 22-Jan-20 03:08 AM <__ice9#6039> I use the 2600F kind for the next-inward layer. 22-Jan-20 03:10 AM mask and gloves with any insulation is second nature for me hehe 22-Jan-20 03:10 AM <__ice9#6039> The 2600F kind is nastier but handles higher temps. 22-Jan-20 03:10 AM <__ice9#6039> Then you can line that with 3000F cement. 22-Jan-20 03:10 AM <__ice9#6039> If you want to use bricks, expect worse (higher) thermal conductivity. 22-Jan-20 03:10 AM <__ice9#6039> But higher strength 22-Jan-20 03:11 AM any experience doing stuff like pass throughs? 22-Jan-20 03:11 AM in the not-a-tube-furnace but more-a-muffle-furnace situation 22-Jan-20 03:12 AM <__ice9#6039> Usually the highest rated kind I find cheaply are also just 3000F though. Use the low density kind. High density is only good for e.g. entry thresholds or inner linings of glass melting vats or something. It has way too high of thermal conductivity and is more like armor than insulation 22-Jan-20 03:12 AM <__ice9#6039> Yeah 22-Jan-20 03:12 AM <__ice9#6039> Use an alumina tube and lots of 3000F cement 22-Jan-20 03:12 AM makes sense 22-Jan-20 03:12 AM just make it long enough to get it away from the heat, basically? 22-Jan-20 03:13 AM <__ice9#6039> Drilling through firebricks esp high density ones is murderous to the drill bit. Use a bunch of cheap masonry spade bits. 22-Jan-20 03:13 AM <__ice9#6039> Yes 22-Jan-20 03:13 AM <__ice9#6039> Is this for sliding in thermocouples? 22-Jan-20 03:14 AM nah I was thinking like gas inlet sort of deal to purge 22-Jan-20 03:14 AM <__ice9#6039> Ah ok yeah that's also useful; put it in the rear at the back 22-Jan-20 03:14 AM <__ice9#6039> Gas flow rates necessary are quite low as well 22-Jan-20 03:14 AM <__ice9#6039> A couple cubic feet (cold) per hour once initial purge is done and chamber is mostly sealed. 22-Jan-20 03:14 AM <__ice9#6039> You can build an entire furnace out of Kaowool and cement if you build it into a big steel stockpot or barrel 22-Jan-20 03:14 AM <__ice9#6039> Though for the bottom I would instead suggest an alumina castable with a lot of bubble alumina/zirconia in it 22-Jan-20 03:16 AM I've got some old air compressors with pinhole leaks and will probably use one of them 22-Jan-20 03:16 AM <__ice9#6039> Yeah that's reasonable 22-Jan-20 03:16 AM <__ice9#6039> Another neat thing I found is pure fused silica fiberglass weave sleeving 22-Jan-20 03:17 AM I guess on the purge/atmosphere-controlled side of things another complication is sealing the door 22-Jan-20 03:17 AM <__ice9#6039> Good to 1600C 22-Jan-20 03:17 AM I've seen the stepped sort of design on them, but not sure what would be appropriate for the actual seal 22-Jan-20 03:17 AM <__ice9#6039> Means you can stuff an entire heating element into it to shield against ground faults or self intersection 22-Jan-20 03:18 AM nice 22-Jan-20 03:18 AM <__ice9#6039> Yes the door seal can be just ceramic felt under pressure 22-Jan-20 03:18 AM well now the muffle furnace is sounding more reasonable to DIY hah 22-Jan-20 03:18 AM <__ice9#6039> You will not get a perfect seal but you just need it to be close enough that positive pressure from inflowing gas is enough. 22-Jan-20 03:18 AM <__ice9#6039> Recall the gas will expand by like an order of magnitude on chamber entry, so a little goes a long way 22-Jan-20 03:19 AM right.. /ideally/ it would be perfect but I don't have any application that requires e.g. hydrogen where a leak at high temp would take a life 22-Jan-20 03:19 AM <__ice9#6039> Um I meant argon 22-Jan-20 03:19 AM <__ice9#6039> Hydrogen is an entirely different situation.... 22-Jan-20 03:19 AM yea me as well 22-Jan-20 03:19 AM <__ice9#6039> Same for CO 22-Jan-20 03:19 AM <__ice9#6039> To the best of my knowledge, flammable or toxic atmosphere furnaces use a sealing system more similar to that in vacuum furnaces 22-Jan-20 03:20 AM that's what I'm saying - what we've discussed/concluded is appropriate for my application (argon) as I don't have any need for hydrogen or similar dangerous situations if a leak were to occur where air got in 22-Jan-20 03:21 AM <__ice9#6039> Build the entire furnace into a big steel drum with an air gap against the outer wall and sometimes water cooling, then just seal the outer drum with silicone 22-Jan-20 03:21 AM <__ice9#6039> Ah yeah 22-Jan-20 03:21 AM don't worry, you're not giving just enough to go off and hurt myself or anything lol 22-Jan-20 03:21 AM we're on the same page 22-Jan-20 03:23 AM <__ice9#6039> 1250-1300C is enough to sinter PZT so Kanthal and 2600F Kaowool coated with 3000F cement is fine. 22-Jan-20 03:23 AM <__ice9#6039> as low as 900C with additives 22-Jan-20 03:23 AM <__ice9#6039> Alumina usually needs at least 1400C even with additives, though 22-Jan-20 03:23 AM <__ice9#6039> Kanthal-A1 melts at 1500C. Max reasonable chamber temps from it are about 1400C and that's using an SCR or similar to ramp down the power supply at higher temps to keep to the rated watt loading curve 22-Jan-20 03:23 AM <__ice9#6039> Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/kanthal_watt_loading_2-6AFC6.jpg 22-Jan-20 03:23 AM <__ice9#6039> Hmm I guess mods could just make a furnace channel here? It seems like other people are also interested 22-Jan-20 03:23 AM <__ice9#6039> The main challenge in getting to 1400C with Kanthal is that very little power is allowed by that point, so insulation needs to be quite good. 22-Jan-20 03:23 AM <__ice9#6039> Meanwhile tungsten, molybdenum, and graphite are all ok at 40 W/cm2 under argon even at very substantial temperatures, because you never really run the furnace close to their melting points-- evaporation becomes the main threat instead. 22-Jan-20 03:23 AM <__ice9#6039> Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/signal-2020-01-15-095922-9A8BC.gif 22-Jan-20 03:23 AM <__ice9#6039> Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/signal-2020-01-15-095922-1-0B9E4.gif 22-Jan-20 03:23 AM <__ice9#6039> Stuff for sealed elements 22-Jan-20 03:23 AM <__ice9#6039> Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/signal-2020-01-20-053259-A3109.jpg 22-Jan-20 03:23 AM <__ice9#6039> Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/signal-2020-01-20-053259-1-626F5.jpg 22-Jan-20 05:19 AM I'm down for a Hot-Stuff channel. One of my projects is a co2 laser glass processing tool and fiber draw tower and I also want to build a glass lathe some day. Would be neat to have a channel that fits that sort of thing. 22-Jan-20 07:20 AM So some thoughts on hydrogen. First I use the tube furnace at a slight angle down to use gravity to keep the purge. Also I leave the one end completely open and just burn off the gas in an open flame. There is no risk of pressure ever building up. Additionally I use no coating or shielding in the quartz tube as the density of the hydrogen is so low at that heat that without the radiant heating directly to the parts I am cleaning the heat time would be extended manyfold. Just some thoughts. As far as safety goes my solution is desperately lacking. If for some reason the tube failed and a enough air got in for combustion it could lead to hot shards of quartz being thrown at great velocity about the place. I have had it deflagrate down the tube many times and it’s a narrow enough tube where it just makes a pop (thing potato gun sound) and that’s it, but there is always a danger. 22-Jan-20 07:26 AM <__ice9#6039> Burn-off in a safe place is a perfectly viable method for reducing the risks of hot hydrogen atmospheres 22-Jan-20 07:39 AM <__ice9#6039> Ah but yes hmm you seem to have the bare tube exposed in a lot of places 22-Jan-20 07:39 AM <__ice9#6039> Keeping it wrapped in insulation improves thermal efficiency and protects against impact damage 22-Jan-20 07:39 AM <__ice9#6039> Yeah I would wonder about deflagration mainly on H2 turn-off 22-Jan-20 07:39 AM <__ice9#6039> https://aiche.confex.com/aiche/s09/techprogram/P144384.HTM 22-Jan-20 07:39 AM <__ice9#6039> Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/Screenshot_20200122-094443-B3D2F.png 22-Jan-20 07:39 AM <__ice9#6039> Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/1579708053084-957FA.png 22-Jan-20 07:39 AM <__ice9#6039> Needs to be a fairly wide tube with rather thin walls before this becomes likely-- but again, it's useful to have some insulation wrapping around it for protective reasons regardless, which would correspondingly reduce the risks of failure 22-Jan-20 07:39 AM <__ice9#6039> Accidental deflagration down the tube when flow rates lessen could be made somewhat less likely by attaching a narrow nozzle at the end leading to a length of metal tubing, at the end of which the gas is ignited. If the nozzle is attached with a plug then it will simply be blown out without damage to the tube if deflagration nonetheless occurs 22-Jan-20 09:46 AM In pre war years at my friends fathers CRT factory in Oceanside they had a hydrogen retort furnace explode. Blew the iron door right through the corrugated steel wall of the building and injured somebody. That’s is when they started making them all gravity held doors so pressure could never really build up. 22-Jan-20 09:47 AM maybe instead of a furnace channel a high temp/pressure channel? need a place for you to talk more about that pressure vessel casting project, _ice9 22-Jan-20 10:09 AM Casting == machining, right?!? 22-Jan-20 10:12 AM no, he means actual casting of a big steel pressure vessel 150mm OD 250mm long he was saying 22-Jan-20 10:12 AM was talking about his furnace setup and plans for possibly a dedicated casting furnace 22-Jan-20 10:20 AM Well i mean, it's more machining than off-topic 22-Jan-20 10:25 AM i was talking about the overall project more than just the making of the steel pressure vessel...because the project it will be used for is definitely out of scope of machining 22-Jan-20 10:25 AM also has been a lot of talk about sintering and stuff recently in here 22-Jan-20 10:25 AM so it seemed like a thing that might make sense 22-Jan-20 12:46 PM <__ice9#6039> Yes the goal of that would be cold isostatic pressing at about 2000 bar for preparing high density green forms for ceramics sintering, by freezing water into ice instead of using comparatively more dangerous pressurized gas or a rather costly high pressure hydraulic pump. The main unresolved question is how much distortion might arise as the last of the water in the chamber freezes. 22-Jan-20 12:46 PM <__ice9#6039> The most obvious alternative if that doesn't work would be to simply pump in cold gas at 300 bar and then heat up the chamber to a few hundred degrees C (below the temperature at which damage to the martensitic microstructure would occur), but that would require welding in a high pressure tube attached to an appropriate valve as well-- rather difficult to fit correctly, albeit possible. Also an armored container to run the thing in. 22-Jan-20 12:46 PM <__ice9#6039> Anyway the point is for sintering alumina/zirconia and other ceramics 22-Jan-20 12:46 PM <__ice9#6039> Valves do exist for working gases up to at least 10,000 bar. I happen to have one rated to 4000 that I found cheaply as surplus a while ago if needed, but recently thought of the ice idea 22-Jan-20 01:13 PM http://www.hiflux.com/en/nv150.php?device=pc&ckattempt=1 22-Jan-20 01:13 PM I wonder what kind of tubing connects to these, to sustain 10340 bar 22-Jan-20 01:14 PM <__ice9#6039> Tbh a failure would still cause it to explode-- just nowhere near as violently as compressed gas vessels do. 22-Jan-20 01:14 PM <__ice9#6039> Oh-- tubing with an extremely narrow central bore, made of a particularly high tensile strength alloy 22-Jan-20 01:14 PM <__ice9#6039> That's why I don't want to weld anything for something like this... it has to be done perfectly to full depth and then re-heat-treated.... 22-Jan-20 01:14 PM <__ice9#6039> Anyway on further reading, it's apparently possible to use precise temperature control to vary the amount of ice vs water in the system, but the remaining liquid water does get compressed by a factor of several percent before ultimately reaching the relevant triple point between liquid and two different solid forms. So there could be some distortion unless the object is kept centered in the chamber and not completely frozen. I'm ok with that. 23-Jan-20 01:42 AM https://twitter.com/ConnorKrukosky/status/1220280136433569792 23-Jan-20 03:46 AM So, I'm editing the patreon tiers to something more serious and enticing, and I'm looking for the second level tier fo a nice DIODE die image, but I can't find anything, anyone got something? 23-Jan-20 03:04 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/20200123_194502-099AB.jpg 23-Jan-20 03:04 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/20200123_194454-AA963.jpg 23-Jan-20 03:04 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/20200123_194448-D8BBB.jpg 23-Jan-20 03:04 PM I made a vacuum cleaner for my cnc 23-Jan-20 03:04 PM It have no filters 23-Jan-20 03:04 PM The below bucket can be emptied when full 23-Jan-20 03:24 PM cyclonic separation? 23-Jan-20 03:39 PM Yes. I can even suck squirrels 23-Jan-20 03:39 PM @GigaSquirrel 23-Jan-20 05:08 PM be nice to squirrels 23-Jan-20 06:25 PM @chucrut is that gypsum board on the outside of your building? 23-Jan-20 06:25 PM Upon closer inspection it appears to be painted OSB 23-Jan-20 06:30 PM Hi @nmz787 I cant remember the material name. Is a OSB board with white epoxy paint. You can buy it. So you dont need to paint it manually 23-Jan-20 06:30 PM I hate manual labor 23-Jan-20 06:30 PM OSB HWRAP 23-Jan-20 06:30 PM If you like it maybe we can make business 23-Jan-20 06:30 PM I send you OSB and you send me a vacuum pump 23-Jan-20 06:47 PM Lol 23-Jan-20 06:47 PM Nah I live near the worlds biggest timber farm 23-Jan-20 06:47 PM Plus OSB is sortof not the best, it doesn't fare well if it gets wet 23-Jan-20 06:47 PM Better strength than plywood otherwise, since it has epoxy and the strands are randomly oriented 23-Jan-20 06:50 PM Is very resistant to rain and sunlight. I have 3 workshops made with this OSB. The first one have 4-5 years and looks like new 23-Jan-20 06:50 PM So, 1 OSB for 1 pump? 23-Jan-20 07:04 PM Hmm, osb goes for $8.75 a sheet locally, so i guess not :p 24-Jan-20 10:17 AM https://cdn.discordapp.com/attachments/426054004402028544/670320334553088030/FB_IMG_1579887029051.jpg 24-Jan-20 01:19 PM Lol 26-Jan-20 01:01 PM "servos" just mean there is positional/speed feedback+controller, right? it doesnt say anything about the type of motor used, ie brushed, brushless, 3ph AC, etc 26-Jan-20 01:02 PM servo just means closed loop somewhere 26-Jan-20 01:02 PM position, speed, torque, noise, heat 26-Jan-20 01:03 PM right, okay.. I'm looking for a motor that I can do feedback with, and just wanted to be on the correct page of the type of power applied doesnt really matter in the world of "servo" 26-Jan-20 01:03 PM what for? 26-Jan-20 01:03 PM oi, I want to make a swiss-type [cnc] lathe 26-Jan-20 01:03 PM then you definitely need a 3 phase ac servo 26-Jan-20 01:03 PM so, a moving headstock for X translation, with a bushing 26-Jan-20 01:03 PM can 3ph hit a specific angle and stay there? ie, if I need to mill a square for the winding stem 26-Jan-20 01:03 PM I only know it to turn, not to hold at a position 26-Jan-20 01:04 PM you will need a very powerful servo but yes 26-Jan-20 01:04 PM that's what they do 26-Jan-20 01:04 PM hrmm.. alright, will look into it more, thanks 26-Jan-20 01:05 PM what size swiss are you building? 26-Jan-20 01:05 PM prob no more than 12mm? 26-Jan-20 01:05 PM I may have a small one, and a larger one 26-Jan-20 01:05 PM you should be okay with 1-2kW on the spindle motor then 26-Jan-20 01:05 PM okay, good to know 26-Jan-20 01:05 PM you'll want direct drive due to the tiny sizes and huge speeds 26-Jan-20 01:06 PM small one for staffs, but a larger one for things like a barrel drum 26-Jan-20 01:06 PM yeah, I was looking into hollow shaft servos last night 26-Jan-20 01:06 PM you don't want the servo to be a driver 26-Jan-20 01:06 PM probably belt 26-Jan-20 01:06 PM a hollow shaft of this power rating will cost you as much as a used manual swiss 26-Jan-20 01:06 PM I sketched out a belt as well, by direct drive, do you mean no transmission? 26-Jan-20 01:06 PM ie gearing 26-Jan-20 01:07 PM correct, motor -> belt -> spindle 26-Jan-20 01:07 PM roger, okay 26-Jan-20 01:07 PM you'll also probably want a nema34 size motor 26-Jan-20 01:07 PM since the larger they are laterally, the higher the holding torque 26-Jan-20 01:08 PM I have a dozen or so decent NEMA34 steppers, but I learned speed is not their forte 26-Jan-20 01:08 PM from anaheim automation, which from what I understand is rebranded chinese stuff, but decent overall 26-Jan-20 01:08 PM oh, they also had positional feedback/rotary encoder (I guess feedback is in the controller) 26-Jan-20 01:08 PM but yeah, no speed 26-Jan-20 01:09 PM that would also be a servo 26-Jan-20 01:09 PM just based on a stepper 26-Jan-20 01:09 PM right, but misses on the speed requirment 26-Jan-20 01:09 PM AC servo is like a regular induction motor, but with feedback and slightly different winding config 26-Jan-20 01:09 PM this is the more expensive end 26-Jan-20 01:09 PM https://www.ebay.com/itm/ECMA-E11820RS-ASD-A2-2023-L-DELTA-2kw-2000rpm-9-55Nm-AC-servo-motor-driver-kit/172284140842 26-Jan-20 01:09 PM but this would suit you perfectly 26-Jan-20 01:09 PM if you have 3 phase, you can go a lot cheaper and a lot more powerful 26-Jan-20 01:11 PM I have one VFD @ 240v 26-Jan-20 01:11 PM though there's a compromise 26-Jan-20 01:11 PM https://www.ebay.com/itm/2-6KW-AC-Servo-Motor-Drive-Kits-10NM-NEMA52-130mm-220V-2500R-Min-with-3M-Cable/323605875608? 26-Jan-20 01:12 PM but... I will be moving into a place that has 3ph 26-Jan-20 01:12 PM this kind of motor will run on single phase 220 26-Jan-20 01:12 PM so I will be switching near entirely to 3ph 26-Jan-20 01:12 PM 2.6kW is enough for you and it's NEMA52 26-Jan-20 01:12 PM which is a big advantage 26-Jan-20 01:12 PM these servo drives are pretty common and relatively cheap 26-Jan-20 01:12 PM downside is that they squeal a LOT 26-Jan-20 01:12 PM squeel in what sense? 26-Jan-20 01:13 PM loud, high pitched squealing when it's holding position or running slow 26-Jan-20 01:13 PM like a humm from the controler? 26-Jan-20 01:13 PM yeah 26-Jan-20 01:13 PM ohh, yeah.. steppers kinda have that too 26-Jan-20 01:13 PM this is a lot worse 26-Jan-20 01:13 PM heh, yeah, no experience 26-Jan-20 01:13 PM I do have two tiny hobby servos 26-Jan-20 01:13 PM if you can ignore the noisy they're fine 26-Jan-20 01:14 PM hooked a sonar detector to a door way that woudl drop a fake spinder on a string and dangle it infront of you, then rotate a reel up 90 deg and then reel it back up 26-Jan-20 01:14 PM cute lil halloween thing 26-Jan-20 01:14 PM the delta I linked squeals a lot less and it's generally better built 26-Jan-20 01:14 PM Noted.. 26-Jan-20 01:15 PM as for speed, do note that they lose quite a bit of torque at the high end 26-Jan-20 01:15 PM you may need to use a speed increasing pulley config so this is something to keep in mind 26-Jan-20 01:16 PM understood 26-Jan-20 01:16 PM BLDC have constant torque, right? 26-Jan-20 01:16 PM or rather it's linear 26-Jan-20 01:19 PM constant torque over the rotation, but not over the speeds yes 26-Jan-20 01:19 PM ah, may look into it a bit more 26-Jan-20 01:19 PM but yeah, I should have 3ph available to me in future workshop no problem.. the building has it 26-Jan-20 01:20 PM you don't need anything totally extreme for a small swiss 26-Jan-20 01:20 PM have to balance speed and torque 26-Jan-20 01:20 PM although... you can always get a 10-20kW motor, just drill a hole through it, and call that a spindle 26-Jan-20 01:21 PM strikethrough on purpose? 26-Jan-20 01:21 PM frankenstein motor mutilation 26-Jan-20 01:22 PM I sort of liked the idea of a hollow shaft motor+spindle.. and if brushless (one way or another) the rotor wont actually wear (beyond the bearings) 26-Jan-20 01:22 PM but, I am still very early on my sketches 26-Jan-20 01:23 PM they exist, however that's not how it works in the industry 26-Jan-20 01:23 PM all belts 26-Jan-20 01:23 PM yeah, makes for easy replacement, etc 26-Jan-20 01:23 PM interchangeability 26-Jan-20 01:23 PM upgradeable, etc 26-Jan-20 01:23 PM and not $20 000 per spindle 26-Jan-20 01:23 PM hah 26-Jan-20 01:23 PM yeah.. I'd like to not think about money just yet 26-Jan-20 01:23 PM design for what is availability is a way to get results fast, and stay within budget 26-Jan-20 01:25 PM regular servo is the way to go then 26-Jan-20 01:25 PM it's a lot easier to machine a funny pulley than to manufacture a motor with a 20-30mm through hole 26-Jan-20 01:26 PM and just belt drive 26-Jan-20 01:26 PM yes 26-Jan-20 01:26 PM yeah, my T&C grinder uses belts and interchangeable pulleys 26-Jan-20 01:26 PM and a simple industrial 3ph motor 26-Jan-20 01:27 PM think of servos as 3ph motors 26-Jan-20 01:27 PM but with positioning, speed, and torque control loops 26-Jan-20 01:27 PM (individually adjustable too) 26-Jan-20 01:27 PM and they know where they are at all times, so at stall they still work 26-Jan-20 01:28 PM grinder motor is 1.5kw.. was looking t hrough my old photos for the name plate 26-Jan-20 01:28 PM servos have a lot more torque per watt 26-Jan-20 02:02 PM Versus a 3-phase motor? You are referring to holding torque right? 26-Jan-20 02:11 PM yes 26-Jan-20 02:12 PM Surprising, considering the construction of the motor itself is the same. Control loops makes a big difference huh? 26-Jan-20 02:17 PM yes, and the construction is usually slightly different 26-Jan-20 02:17 PM more poles, wider motors, bigger rotors 26-Jan-20 03:32 PM @idmb Please could change your username to imdb? 26-Jan-20 03:34 PM internet data movie base no 26-Jan-20 03:35 PM I hate you 27-Jan-20 05:33 AM Styro's making some new dissapointment fuel for Funranium https://cdn.discordapp.com/attachments/426053961624190986/671163577398460416/20200126_192224.jpg 27-Jan-20 05:33 AM Reportedly a 95W projector diode array 27-Jan-20 05:33 AM Tbh the radar gun as a chassis has some proper Fallout laser pistol vibes. Just needs a "power" and "focus" knobs in the back. 27-Jan-20 05:44 AM pew pew 27-Jan-20 01:37 PM @rfs please post nothing but introductions in #introductions_and_directory 27-Jan-20 01:37 PM Ah, ok 27-Jan-20 01:37 PM That varies so much server to server 27-Jan-20 01:37 PM Did ya remove it or does the bot do it? 27-Jan-20 01:37 PM it says so in the pinned message 27-Jan-20 01:37 PM I did it 27-Jan-20 01:38 PM grah 27-Jan-20 01:38 PM no worries, just don't do it again ^^ 27-Jan-20 01:38 PM ya oki 27-Jan-20 09:37 PM shake damn head at Spyro's garbage 27-Jan-20 09:47 PM :)) 27-Jan-20 10:04 PM I will brace myself for a twitter feed of "Didja see what the idiot did this time?" tomorrow morning. Congratulations @rfs, you beat the laser safety listeserv to sharing this with me. 27-Jan-20 11:26 PM hmm 27-Jan-20 11:26 PM what's the thing? That he (styropyro) could destroy his eyes? 27-Jan-20 11:26 PM TBH I like his productions since they're sometimes pointing to sources for cheap optics parts 27-Jan-20 11:26 PM It's a little bit like siliconsam (sam's laser FAQ) on meth 27-Jan-20 11:26 PM no? 27-Jan-20 11:26 PM + it's funny (imho) 28-Jan-20 10:30 AM Encouraging the trade of laser systems illegal for sale in the United States and sharing designs of sketchy class 4 systems for the unwary/less skilled is not good. In America, you absolutely have the freedom to blind yourself in the privacy of your own home. Take it outside and share with the world? Less so. 28-Jan-20 10:30 AM When viewed through the eyes of a laser & radiation safety professional, spyro’s video are decidedly unfunny. But they do get used for lessons of what not to do all over the world for training purposes. 28-Jan-20 10:58 AM hm 28-Jan-20 10:58 AM but I like them - but I also enjoy roofing videos 28-Jan-20 11:10 AM @funranium You can imagine what kind of people join his discord server 28-Jan-20 11:10 AM At least the safety culture is improving and people are educated on actually getting protective gear and not that 7W pointer 28-Jan-20 11:10 AM The usual kidiots too. 28-Jan-20 12:00 PM Oh, I know all too well the people on that server. While I haven’t gotten anyone expelled yet, I did have to warn someone that continued unthoughtful participation in the shenanigans for that community will be quite limiting of their future academic and employment prospects. And that things like $THING can be built, if you ask first and get approval. The answer is never no, but it may take some work to get to yes. Not all the lessons on this campus happen in a classroom. 28-Jan-20 12:02 PM True 28-Jan-20 12:06 PM Or as I finished the conversation with that student “This campus has a long and not terribly proud history with directed energy weapons. Let’s do it right or not all.” 28-Jan-20 12:08 PM That's a good sales speech. 28-Jan-20 12:11 PM snrk 28-Jan-20 12:13 PM I try to make sure my researchers don’t accidentally help an idiot colonel in Florida commit war crimes. 28-Jan-20 01:49 PM <__ice9#6039> I don't really understand the point of high powered laser pointers. The backscatter is tremendously dangerous and mandates full industrial precautions, yet they still can't cut anything useful even when carefully focused. At best they can sometimes etch a bit. It's right in the middle between aesthetic value and materials processing usefulness but servicing neither particularly well. There are occasional niche uses, but usually the form factor isn't ideal-- the box shaped ones are simpler to mount rigidly. 28-Jan-20 01:49 PM <__ice9#6039> Like they don't make any sense as hand tools, in particular 28-Jan-20 01:59 PM Big numbers and lightsaber looking tubes appeal to some people. 28-Jan-20 01:59 PM Imo, they are in the same class as novelty knives and katanas. 28-Jan-20 09:49 PM Well I just finished some plumbing not what this channel generally refers to when saying plumbing: https://media.discordapp.net/attachments/424015983414607872/671952096232210432/DSC_2943.JPG 28-Jan-20 09:49 PM https://media.discordapp.net/attachments/424015983414607872/671952108861521920/DSC_2944.JPG 28-Jan-20 09:49 PM New kitchen sink 28-Jan-20 09:49 PM Now I can wash BIG conflat pieces :) 28-Jan-20 09:49 PM lol 28-Jan-20 10:19 PM nice :D 28-Jan-20 11:23 PM yay 28-Jan-20 11:33 PM Nice! 29-Jan-20 12:07 AM @funranium of course he has the right to share such content 29-Jan-20 12:07 AM btw 29-Jan-20 12:07 AM not less - full f* yess 29-Jan-20 12:07 AM maybe he did stupid things (who doesn't?) and maybe he has not a full fledged theoretical background (he's tryin) 29-Jan-20 12:07 AM but what exactly is he doing wrong, that he's quite popular? 29-Jan-20 05:54 AM @Conmega now to work on that piece of trim under the window 29-Jan-20 06:00 AM lol all of my trim is gone from windows I have replaced.. still have 3 windows left to do 29-Jan-20 06:00 AM also.. working on a new (like brand spanken new movement from the package) Rolex 3235.. and their escape wheel and pallet fork are made via UV-LIGA.. nice to put my hands (okay.. tweezers) on a part known to be made that way, and also gives me idea... 29-Jan-20 06:00 AM I originally had the idea of: make the smallest watch in the world using MEMS technology.. and so forth, then I became too romanticized into handmade watches, etc etc... starting to work my way back to modern technology though 29-Jan-20 06:06 AM :)) 29-Jan-20 06:06 AM what really did it for me was modern metrology 29-Jan-20 06:06 AM proving to me that old swiss machines are outdated 29-Jan-20 06:06 AM and worn 29-Jan-20 06:06 AM but yeah... maybe we'll see some DIY LIGA-likeness in the future 29-Jan-20 06:06 AM expensive part is t he small bottle of SU-8 29-Jan-20 06:06 AM maybe a chromium mask for every itiration, as well 29-Jan-20 06:08 AM do they all their (rolex') stuff inhouse? 29-Jan-20 06:08 AM they used to not own the manufacturing company of their movement, but they only made Rolex stuff... they eventually bought them out 29-Jan-20 06:08 AM so yes 29-Jan-20 06:08 AM there is one oil (out of 6 different ones?) that they do not make themselves 29-Jan-20 06:09 AM ah ok 29-Jan-20 06:09 AM that's about it 29-Jan-20 06:09 AM this brand new stuff is pretty high class, not gunna lie 29-Jan-20 06:10 AM I believe 29-Jan-20 06:10 AM oh, and we're not allowed to take pictures over these few days :/ 29-Jan-20 06:10 AM the guy actually didnt say a word when asked, because he did not know 29-Jan-20 06:10 AM :(( 29-Jan-20 06:11 AM meh, it looks like the promo material online 29-Jan-20 06:11 AM shhh they will never know! promise! 29-Jan-20 06:11 AM I think there is a chance the school will keep the movements when all done, but I could be wrong 29-Jan-20 06:12 AM bbl 29-Jan-20 06:12 AM need beer and other food 29-Jan-20 06:12 AM yeah, nearly ready for dog walk then bike into school 29-Jan-20 09:30 AM @nmz787 There was actually a shelf there that caused clearence issues for the new faucet, I have a new board to go there I just need to cut to size and stain before throwing in there and gluing down. 29-Jan-20 10:28 AM Ah, makes sense 29-Jan-20 10:28 AM @Noxz maybe some combination of ALD and RIE or ALE (atomic layer etch) could get around LIGA 29-Jan-20 10:51 AM @N00N Yes, he absolutely has the 1st amendment right to do this in America. That right does not absolve of responsibility for your actions. He is a patient zero for a memetic plague of fundamentally dangerous and irresponsible use of Class 4 lasers. Lasers that are illegal to import into the United States. Lasers that will get you no sympathy at all from insurers in the event of damage or injury, and special high intensity attention from law enforcement and regulators if you hurt others or take it outside. His active contempt for the regulations, standards, and basic responsible practice is why I would dearly love his channel to be gone. 29-Jan-20 10:51 AM b...but lasers are lasers! 29-Jan-20 10:51 AM occams lasor 29-Jan-20 10:54 AM Yes they are. They are not toys. 29-Jan-20 10:57 AM hmm I must say 80% of the chemistry I did as a 10 yo were more dangerous than those tattoo removal Nd:YAG 29-Jan-20 10:57 AM science is like a sport, right? 29-Jan-20 10:57 AM you can easily die snowboarding 29-Jan-20 11:19 AM No, science is decidedly not like a sport. Your chemistry is done with all appropriate precautions, basis of knowledge and training before even beginning, adequate equipment and workspace for the chemistry you intend to do, with a healthy margin for error, and the correct PPE. Or at least it should have been. The danger comes in skipping that, not only to you but to others. Sorry, but I don’t react well to cavalier attitudes to safety. Spent far too many years working with high voltage, beryllium, transuranics, concentrated acids, building high powered lasers and more to behave otherwise. Endangering yourself and others is not endearing. The point of risk management is to recognize them and mitigate. 29-Jan-20 11:24 AM i consider a lot of the stuff i did as a 10yr old to be less 'science' and more 'science-inspired screwing around' 29-Jan-20 11:24 AM i think there's an important distinction to be made that seldom is with a lot of risky popsci stuff 29-Jan-20 12:46 PM Just compare that guy's videos with lasers and safety to say nilered's videos on chemistry and how he does safety. He says how you should do things, what you need, fumehood, etc, and how to take precautions. Idiot with the lasers does none of this. 29-Jan-20 12:46 PM Its very simple to cover things and say, I am doing something dangerous and stupid and I am taking precautions, but even with precautions you should either not try this at home or don't do this at all. He instead is like, psht this is cool, you can totally just buy this on eBay and play around with it. 29-Jan-20 12:50 PM Hmm, ok 29-Jan-20 12:57 PM Like... Its one thing to fart around with friends and joke about that kinda stuff. But when you know your showing something like that to a possible audience of impressionable kids/teens/ignorant adults... Its not cool. 29-Jan-20 12:57 PM But I also like cody and extractions&ire 29-Jan-20 12:57 PM and edwin sarkissian 29-Jan-20 12:59 PM Even they generally have some kind of like, obviously this isn't a great idea, I wouldn't recommend doing this at home... They may be less serious than nilered but even extractions&fire is like, this is REALLY dangerous and REALLY freaking stupid 29-Jan-20 01:00 PM but funny 29-Jan-20 01:00 PM I like him 29-Jan-20 01:00 PM Yea I like his content, its just serious enough to actually educate and memey enough to be a casual relaxing fun watch 29-Jan-20 01:00 PM his one on liquid ozone was great lol 29-Jan-20 01:00 PM I am much more carefull 29-Jan-20 01:01 PM he was like, this stuff is so bad NASA even noped out of working with it and they work with some nasty stuff. 29-Jan-20 01:01 PM and I understand what's anoying with styropyro 29-Jan-20 01:01 PM he plays kinda arrogant and so on 29-Jan-20 01:01 PM no... he is just arrogant 29-Jan-20 01:01 PM thats the problem 29-Jan-20 01:01 PM yeah 29-Jan-20 01:01 PM he isn't clearly playing it 29-Jan-20 01:01 PM it just IS 29-Jan-20 01:01 PM too arrogant for his skill level 29-Jan-20 01:02 PM he just gives off this persona of "I'm too cool for safety" and THATS NOT COOL 29-Jan-20 01:02 PM but for me it's entertaining 29-Jan-20 01:02 PM everyone else like extractions&fire are TERRIFIED of what they are doing, and express how stupid it is 29-Jan-20 01:02 PM giving at-least some sense of, do not do this at home or be VERY VERY careful if you do, styropyro has no such fear or care 29-Jan-20 01:03 PM yeah like roofing 29-Jan-20 01:03 PM you can't be good enough for that, but ppl are doing it 29-Jan-20 01:03 PM and what that teaches others is there is no fear of owning such lasers... 29-Jan-20 01:03 PM which is VERY VERY wrong 29-Jan-20 01:03 PM and looking at their footage gives chills 29-Jan-20 01:04 PM I am not saying extractions&fire and cody's lab or these guys are all perfect examples either... 29-Jan-20 01:04 PM they could probably give some better warnings about things 29-Jan-20 01:05 PM ok you say he's a bad example 29-Jan-20 01:05 PM but they at-least don't just give off the "I'm too cool for safety" instead its the "I understand the risks associated, you shouldn't try this yourself" 29-Jan-20 01:05 PM like many pop stars abusing drugs and so on 29-Jan-20 01:05 PM AND DOES THAT MAKE IT ANY MORE OK??? 29-Jan-20 01:06 PM on that abstraction level: full ack 29-Jan-20 01:06 PM If your going to compare anyone to a drugged up pop star as like if they are OK then why not this person? like.. what is your bar for a healthy competent human being? 29-Jan-20 01:07 PM this "I'm to cool for ..." is normal pop behaivour 29-Jan-20 01:07 PM well even if they are broken I can like what they're doing, right? 29-Jan-20 01:07 PM that's all - and I think it's a good sign because doing (ill prepared and stupid) science experiments can make you popular 29-Jan-20 01:09 PM Uhm, well see its a moral standing, if you support the person by liking their stuff your ultimately accepting their morals and how they stand on things in relation to the content anyway. 29-Jan-20 01:09 PM Also just because you know the difference doesn't mean little 12 year old timmy over here with mom's creditcard does, and goes and buys one of these laser removal systems and proceeds to damage his and his friend's vision with a laser they shouldn't be playing with. 29-Jan-20 01:09 PM Also while it may be common pop behavior doesn't mean it should be accepted or seen as OK 29-Jan-20 01:09 PM it goes as the same logic of, well rich people can afford to break the law so breaking the law is OK for them 29-Jan-20 01:09 PM no it shouldn't be... 29-Jan-20 01:12 PM I think if he motivates 0.1% of his subs to learn optics and physics that's okay 29-Jan-20 01:12 PM and we shouldn't like them or their content either, you should instead find other creators with morals you agree with and give them your support 29-Jan-20 01:12 PM and at the same time the 10% of his audience that gets irreversible eye damage is a fair tradeoff? 29-Jan-20 01:13 PM but I guess I understand the problem 29-Jan-20 01:13 PM no... no that is NOT ok 29-Jan-20 01:13 PM I don't care if its 50% of his audience gets interested in optics and 10% losses their eyes... its still not fair 29-Jan-20 01:13 PM okay but 10% of his audience with eye damages? 29-Jan-20 01:13 PM that's fiction, right? 29-Jan-20 01:14 PM Yes I made it up as a point of arguement, the point is it doesn't matter the percentage 29-Jan-20 01:14 PM people are generally not that stupid 29-Jan-20 01:14 PM they way he gives off the showing of NO danger of playing with these things is wrong. 29-Jan-20 01:14 PM ... 29-Jan-20 01:14 PM you clearly have not met or dealt with "most people" 29-Jan-20 01:15 PM yeah ok like spider man climbing walls could motivate childs to try the same 29-Jan-20 01:15 PM most people ARE quite that stupid, have you not seen videos of people doing things like standing on the roof of a moving car, or jumping off a building into a pool or jumping off the roof onto a trampoline or... 29-Jan-20 01:15 PM there is a difference between fiction expressed as fiction and actual things 29-Jan-20 01:15 PM also, driving imagination and showing someone they can buy something on eBay are two different things 29-Jan-20 01:16 PM but okay that's like youtube destroys the sanity of humankind stuff 29-Jan-20 01:16 PM ? 29-Jan-20 01:16 PM Sorry I am not sure I quite understand what you were trying to say there. 29-Jan-20 01:17 PM some people doing stupid things gain fame, right 29-Jan-20 01:17 PM Does that make it right? 29-Jan-20 01:17 PM welll it's stupid 29-Jan-20 01:18 PM its like the tide pod challenge... it was a stupid joke that ended up causing lots of people to actually freaking try it... 29-Jan-20 01:18 PM that is the danger 29-Jan-20 01:18 PM there are ways to show cool dangerous things and ways not to 29-Jan-20 01:19 PM doing his stupid things needs more prep 29-Jan-20 01:19 PM filters many possible casualities out 29-Jan-20 01:20 PM look at billy nye or practical engineering, or yada yada, these people show off sometimes dangerous concepts but on scales that if done at home aren't dangerous by themselves, scaled up they could be sure, but if they show something scaled up there is no education on how to GET such equipment/etc... the point being if you want to go learn about it you can, but they aren't responsible, its the individual at that point 29-Jan-20 01:20 PM but the way that he shows something dangerous, big, and stupid, shows no care towards safety, gives no feeling of danger, and then immediately shows how you can BUY ONE, is just wrong 29-Jan-20 01:20 PM if you want to have a video of you blowing your eyes out with lasers, don't freaking tell people how you got said lasers at-least... 29-Jan-20 01:20 PM if they want to do the research on their own, then its their responsibility and their problem 29-Jan-20 01:20 PM but the fact that he shows those people how to get their hands on this stuff, as far as I am concerned its his responsibility if someone gets hurt by one of these things after watching his video 29-Jan-20 01:20 PM Entertainment and Education can be intertwined, I am not arguing that, its just the way you do it. 29-Jan-20 01:20 PM I am not saying he shouldn't be making videos period with the persona he has. 29-Jan-20 01:20 PM The problem is the way he just hands out information while showing no respect to safety is dangerous. 29-Jan-20 01:24 PM hm ok 29-Jan-20 01:24 PM from now on I will watch the videos without liking them 29-Jan-20 01:26 PM There are 7.5 billion people on this planet, I am sure you can find someone else making entertaining optics/laser videos that has some respect for safety. 29-Jan-20 01:44 PM @N00N People are that stupid. styros discord has people talking about buying 500mW-5W handheld laser pointers and have to be fought to buy protective equipment 29-Jan-20 01:44 PM And people just lie about having protective equipment 29-Jan-20 01:44 PM And only for them selves, not potential audiences 29-Jan-20 01:44 PM And always the constant "I want one watt" 29-Jan-20 01:44 PM For the sake of owning one watt, because it's a big and power full number 29-Jan-20 01:44 PM when 100mW's are dangerous 29-Jan-20 02:43 PM All of the above is why I have job security doing my best to make my students/researchers think before they act. When I catch them too late, it’s a fine reason to drink. 29-Jan-20 03:55 PM Not sure if I should move this rather long reference rant I put together three years ago to #lasers_and_optics but it’s more about design ethos, maker culture, and what rules and regs (such as they are) exist for lasers. http://www.funraniumlabs.com/2017/08/laser-products-hate/ 29-Jan-20 04:41 PM i love your blog :D 29-Jan-20 04:53 PM speaking of questionable designs, i need to wander over to the hardware store and see if they have any thin clear plastic sheet.. something to act as an atomized-glass-shrapnel shield for when a mason jar sputter-coater decides to pop 29-Jan-20 04:53 PM (also bc i'm terribly squeamish and hate cleaning broken glass up, especially broken glass that's been thrown ~feet around my messy bedroom) 29-Jan-20 04:56 PM Considering we recently had the window on a vacuum chamber’s window blow and a researcher only got to keep her eyes due to her laser safety glasses and the laser barrier on table? Yes, this is a good idea. She’s happy to have as few scars on her face and chest as she does. 29-Jan-20 04:58 PM oh yikes 29-Jan-20 04:58 PM how big of a window? 29-Jan-20 04:59 PM And what caused it to break? 29-Jan-20 05:00 PM I worry a bunch about accidentally clumsying a wrench or something into my 4" viewport and goring myself on glass shrapnel, though in my current setup it's probably more likely to snort itself down two feet of pipe and comfortably settle in place in my turbo instead 29-Jan-20 05:01 PM Oh I don't want to have nightmares tonight 29-Jan-20 05:01 PM But that vision is stuck in my mind now 29-Jan-20 05:02 PM you're right, i should cut some extra shield plastic for that viewport too 29-Jan-20 05:02 PM >_> 29-Jan-20 05:12 PM 6” of fairly fairly thick optical quartz. Lots of shrapnel. They’ll be framing the glasses and barrier with embedded shrapnel. Proximal Cause: Failure due to over-pressurization during a dry nitrogen purge. Root Cause: That procedure you do all the time on your other apparatus at a different institution does not work that way here. 29-Jan-20 05:13 PM rip 29-Jan-20 05:15 PM On a positive note, it blew out so it didn’t take the rest of the vacuum system with it though researcher would have lost some organs if the table edge laser barrier hadn’t been there. Unfortunately, all the optics between that window and that barrier weren’t so lucky. 29-Jan-20 05:16 PM honestly surprised there wasn't an overpressure valve anywhere on the system if they're doing at-pressure nitrogen purges, but, then, like, i feel like i never see overpressure valves anywhere 29-Jan-20 05:17 PM the tank should generally have a pressure reducer 29-Jan-20 05:17 PM they're certainly about as ludicrously expensive as i'd expect a bit of foil on a flange to be, from the usual OEMs 29-Jan-20 05:17 PM i'm sure that doesn't help 29-Jan-20 05:18 PM Why is high pressure nitrogen purges necessary? 29-Jan-20 05:18 PM A few low pressure nitrogen purges won't do? 29-Jan-20 05:18 PM i know vacuum viewports are not safely able to take any positive pressure 29-Jan-20 05:18 PM I'm assuming it's supposed to be a low pressure purge 29-Jan-20 05:18 PM so literally anything above atmosphere 29-Jan-20 05:19 PM Yeah, so really regulators on cylinders won't help 29-Jan-20 05:19 PM low pressure regs exist 29-Jan-20 05:20 PM Oh good to know! But I'll take my time and purge my chamber with the tiny leak valve 29-Jan-20 05:20 PM You'd be surprised how much it flows when you back the nut all the way out! 29-Jan-20 05:22 PM i use the little screw knob on my turbo to bring my chamber to atmosphere 29-Jan-20 05:22 PM i'm not smart enough to feed dry nitrogen into this thing without Causing An Incident 29-Jan-20 05:22 PM it just takes, like.. five minutes of hissing 29-Jan-20 05:29 PM Yes, well, surprises were had all around on this one. 29-Jan-20 05:30 PM just out of curiosity shouldnt any vacuum viewport theoretically be able to take at least 2atm pressure inside the vessel? still not much 29-Jan-20 05:30 PM And while low pressure purges aren’t quite sufficient for this system, I gather it wasn’t meant to be THAT high. 29-Jan-20 05:31 PM can you guys add a safety release valve to your system to prevent any future problems? 29-Jan-20 05:31 PM something with a bit of margin over the necessary purge pressure but under any burst pressures 29-Jan-20 05:32 PM KJL's conservative-but-sound stance is 'under no circumstances should the pressure on the inside-side of a vacuum viewport be higher than the outside-side' 29-Jan-20 05:32 PM maybe it has to do with the mechanical stresses involved and how the viewports are normally held 29-Jan-20 05:32 PM some viewports are sort of press-sealed in place on the flange with some kind of sealant and could theoretically just pop right out if pressed against from the inside 29-Jan-20 05:32 PM yeah 29-Jan-20 05:32 PM also how the glass is sometimes made curved to hold load in one direction but not the other 29-Jan-20 05:33 PM just was thinking that if something of a given thickness can serve as a viewport for vacuum it should also be able to survive 2atm because it is roughly the same amount of difference in relative pressures (or lack of pressure) 29-Jan-20 05:33 PM i have not seen any curved viewports though but that is probably just lack of experience 29-Jan-20 05:36 PM Remediation with a long hard look at other reaction vessels has taken place. When a rather senior postdoc suffers a blow out, a whole department gets to take a time out to look their gear over. 29-Jan-20 05:36 PM sensible 29-Jan-20 06:39 PM does electroless UV-LIGA go by some other name? like, it's just SU-8 + electroless plating (not galvanic, if galvanic always implies electroplating) 29-Jan-20 06:46 PM <__ice9#6039> @N00N the tattoo removal YAG looked interesting for surface treating objects, but preferably by a machine in a solid metal box-- someone sent me that video and the backscatter was literally killing the CCD in the guy's camera the entire way through. You can buy another camera but you cannot buy another set of eyes. 29-Jan-20 07:02 PM <__ice9#6039> Anyway there are better form factors for that-- industrial pulse YAG by passive Q-switch is quite well developed already and those machines just repackage the same basic system components 29-Jan-20 07:02 PM <__ice9#6039> And if you are trying to calibrate an experimental high energy laser system, do it with a remote camera 29-Jan-20 07:02 PM <__ice9#6039> @qualia just put a layer of polycarbonate over the viewports. Hmm also when I built my fume hood, I didn't even use any glass, just a big sheet of lexan with a few layers of silica coating, which reminds me-- blast shields are really great and not difficult or costly to make at all. Nice extra precaution for boiling acids, HF, chemical glassware under vacuum, etc. 29-Jan-20 07:02 PM <__ice9#6039> I protect my turbopump with a screen mesh KF gasket and a perforated plate behind that over the intake. Not sure whether CF has screens of a conceptually similar nature. Though honestly a sudden chamber failure would probably cause damage from the pressure alone. 29-Jan-20 07:17 PM if a chamber ruptures to air the turbo is turning into salad regardless of how it's protected 29-Jan-20 07:19 PM <__ice9#6039> Yes. The screens are for catching flecks of metal scale, stray zeolite beads, etc. 29-Jan-20 07:19 PM <__ice9#6039> Zeolite beads, activated alumina beads, and I assume most likely silica gel beads are all also hazardous to kitchen sink garbage disposals, which once turned out to be quite obnoxious given their known tendency to escape and bounce in random directions during pouring. 29-Jan-20 08:32 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/unknown-771B6.png 29-Jan-20 08:32 PM found this gem 29-Jan-20 08:32 PM seller censored the pumping speed instead of the serial number 29-Jan-20 08:34 PM is it cheap? 29-Jan-20 08:34 PM absolutely not 29-Jan-20 08:34 PM doesn't quite know what they're selling but still priced at a good fraction of the new price 29-Jan-20 08:35 PM hm 29-Jan-20 09:36 PM <__ice9#6039> @Yousername quick Fermi estimate suggests each blade of a turbopump is likely supporting centripetal force exceeding 1000 N at full speed in vacuum 29-Jan-20 09:37 PM and that's why large pumps are meant to be bolted down 29-Jan-20 09:37 PM (besides the vacuum system I mean) 29-Jan-20 09:48 PM I will be quite happy to never ever bear witness to a turbo that decides to not be one anymore. 29-Jan-20 10:00 PM smaller turbos will just make expensive noises and then present a horror show when you take the vac system apart 29-Jan-20 10:00 PM big turbos could even run away, shear the bolts off 29-Jan-20 10:00 PM never heard of one actually exploding, but the energy is roughly on the same order 29-Jan-20 10:10 PM i saw a turbo shell when picking an ebay purchase up that had a blade sticking out of the outer edge about 5mm...but it was a really big turbo 29-Jan-20 10:10 PM like 5 gallon bucket size 29-Jan-20 10:12 PM hm that sucks 29-Jan-20 10:12 PM not anymore 29-Jan-20 10:12 PM ok so are there any good pre-failure indicators? 29-Jan-20 10:12 PM like noises? 29-Jan-20 10:14 PM Not being able to reach top speed, excessive heat... etc 29-Jan-20 10:15 PM early enough to shut some valves and maybe shut down the valves 29-Jan-20 10:15 PM My turbo has temp monitors for both top and bottom bearings and also hour indicators 29-Jan-20 10:15 PM they don't fail spontaneously afaik 29-Jan-20 10:15 PM the signs build 29-Jan-20 10:15 PM ok temperature is easy to measure that would be great 29-Jan-20 10:15 PM ok 29-Jan-20 10:15 PM unless you drop a rock in it or something 29-Jan-20 10:15 PM yeah ok 29-Jan-20 11:21 PM My problem is that I tend to show up in situations where things are just shy of failure or already have. Badly. As @Yousername said there are signs but somehow people ignore them because they are focused on a different part of the experiment. 29-Jan-20 11:22 PM I've heard horror stories of mass spectrometer turbos being driven until they stop spinning on their own 29-Jan-20 11:42 PM dang i guess i missed a big meteor that was over Southern California tonight 30-Jan-20 02:27 AM no, it missed you 30-Jan-20 08:42 PM @Spirit my 2200iPL instructions just say to ensure it’s attached to 500kg 30-Jan-20 08:42 PM can't run away with half a ton bolted to it 30-Jan-20 08:48 PM How far below would you comfortably push that though? 30-Jan-20 08:49 PM the floor, ideally 30-Jan-20 08:49 PM with bolts. 30-Jan-20 08:51 PM No can do 30-Jan-20 10:28 PM The other oil pump system sitting in storage 30-Jan-20 10:28 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/image0-D3EBA.jpg 31-Jan-20 01:34 AM I would take it 31-Jan-20 10:15 AM one of the most fun things about living in Southern California is putting on the news while you are working on things and end up watching a police chase instead of working 31-Jan-20 11:43 AM personally I thought one of the best things about living in SoCal was lane-splitting on my motorcycle 02-Feb-20 01:25 PM https://twitter.com/storax7662/status/1224055143286444033 02-Feb-20 01:47 PM https://www.youtube.com/watch?v=SWnXJFAGk2Y 02-Feb-20 01:47 PM oh no 02-Feb-20 02:01 PM Haha 02-Feb-20 02:01 PM Hard to tell of that was intentional or not 02-Feb-20 02:38 PM Looks quite intentional to me 03-Feb-20 12:39 AM yeah 03-Feb-20 12:39 AM they closed the valve intentionally 03-Feb-20 12:39 AM and the rope 03-Feb-20 12:39 AM and a MRI system on a meadow is always suspicious 03-Feb-20 12:39 AM it's kinda shocking I mean ... y? :)) 03-Feb-20 12:39 AM is it really like you can't do anything else with old mri systems? 03-Feb-20 02:58 AM They just pulled the Plug of the Vacuum Dewar of the Helium vessel and it will rapidly boil 03-Feb-20 05:11 AM yes 03-Feb-20 05:11 AM normally you can let the gas out without explosion 03-Feb-20 05:11 AM but they wanted the boom 03-Feb-20 05:11 AM what's kinda sad 03-Feb-20 05:11 AM But in my opion all non nuclear explosions are kinda pointless and boring 03-Feb-20 05:19 AM ^+1 03-Feb-20 06:14 AM and that was just wasting nice equipment and helium imho 03-Feb-20 12:00 PM Perhapsatron. Hahahahaha.. will it blow up? Perhaps. Don’t know. 03-Feb-20 09:54 PM makin' pancakes at 10pm 03-Feb-20 10:03 PM @N00N Iunno, the Cambrian Explosion was pretty neat 03-Feb-20 10:40 PM ehehehe 03-Feb-20 10:40 PM yeah ok but that's more like a desaster ^^ 04-Feb-20 01:57 PM @idmb should I read your name as "I dumb"? Or just as a string of letters? 04-Feb-20 01:57 PM (no offense meant, was questioning whether to ask or not... But it's one way I'm reading it and would rather settle in my head on one way and not question it) 04-Feb-20 02:03 PM Letters I guess, or internet data movie base 04-Feb-20 02:04 PM Ok, just couldn't tell if it was meant to be a joke or not, or how much of one 04-Feb-20 02:04 PM My mind immediately thinks of this as an antonym 04-Feb-20 02:04 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/d8f1c2c379626b83f4e00ac24f0a562a-16A78.jpg 04-Feb-20 02:46 PM Anyone here want a copy of all of scihub? It's around 70TB 04-Feb-20 02:46 PM I know a guy, and am contemplating buying a tape drive and 10 pack of tapes to grab a copy 04-Feb-20 02:53 PM upload it to textfiles :D 04-Feb-20 03:03 PM Actually its 75 and 45 for libgen 04-Feb-20 03:03 PM Thinking of mining this volume of data for say, chemical reaction pathways or processes, is pretty daunting to think about 04-Feb-20 04:34 PM >_> 04-Feb-20 04:34 PM welp time to buy all new hard drives for my 24-bay fileserver 04-Feb-20 04:38 PM This filter was attached to the accompanying neslab chiller I got at some auction. Just didn't have exactly the right adapter. 04-Feb-20 04:38 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20200204_163701-35917.jpg 04-Feb-20 04:41 PM @qualia I'm thinking if I do this, I might just spring for a tape drive... Purely based on the latest reviews of the harddrives I looked at on Amazon today 04-Feb-20 04:43 PM i wouldn't want to use tapes for anything other than long-term archiving 04-Feb-20 04:43 PM granted, this is a great resource to have a long-term archive of, but 04-Feb-20 04:48 PM Read performance seems pretty comparable to HDD, do they degrade more than HDDs the more you read? 04-Feb-20 04:55 PM lol adapters 04-Feb-20 05:01 PM @nmz787 It's not the read performance, it's the seek performance. 04-Feb-20 05:15 PM Ah yeah I get that 04-Feb-20 05:18 PM tapes really are for Just Backups 04-Feb-20 05:18 PM trying to seek across a many-TB tape has to be an agonizing affair 04-Feb-20 06:53 PM @nmz787 just the PDF's or is there any meta data sort of stuff? Organized in any way by e.g. journal? 04-Feb-20 06:53 PM I'm assuming they are already being compressed what with being largely text? Though I am ignorant of how far from words the PDF format is. IIRC it's basically XML so still has the text contents as text and should compress decently. 04-Feb-20 06:53 PM Speaking of which you could probably extract any heavy content (images) and use some external reference/link/placeholder and rewrite if you're wanting to mine content. Useless if that just brings you 20TB of savings though. 04-Feb-20 06:53 PM Count me as interested, though. I'm in the same boat of trying to think of economical as well as useful storage though. 04-Feb-20 07:57 PM 8TB external drives are $139 on Amazon... 04-Feb-20 07:57 PM There's some sort of organization, I think it's just based on the DOI though 04-Feb-20 07:57 PM I'm guessing not all the PDFs have text, really old articles might just be scanned images 04-Feb-20 09:36 PM Yea definitely something different for some of those oldies. Sometimes even highlights individual-ish characters but puts junk on the clipboard when trying to copy/paste hehe. 05-Feb-20 10:43 AM Heh 05-Feb-20 10:43 AM I was just looking for some data on old ortec stuff 05-Feb-20 10:43 AM found some old catalog from 1996 05-Feb-20 10:43 AM and look who has an ad in there 05-Feb-20 10:43 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/unknown-414E7.png 05-Feb-20 10:43 AM (those are my go-to when I need high vac stuff, one of the few companies that still sell to individuals here) 05-Feb-20 10:43 AM ah I just love browsing through older stuff 05-Feb-20 10:43 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/unknown-8BA39.png 05-Feb-20 10:43 AM I'm pretty sure I've been in the lab on the left, with the hexagonal cluster of 7 05-Feb-20 03:10 PM https://www.youtube.com/watch?v=s1IbfokGr0Y 05-Feb-20 03:10 PM The opposite of vacuum stuff 06-Feb-20 12:07 PM Hey all! I figure off topic is good for this, because it's not vacuumy at all, but does have to do with precision clean machines. 06-Feb-20 12:07 PM Does anybody have a good resource for a protocol for aligning a laser interferometer measurement system? 06-Feb-20 12:07 PM We just had someone on our team loosen a LOT of screws on our cleanroom's pattern generator system, and are in a bit of a bind. 06-Feb-20 12:11 PM oh no D: 06-Feb-20 12:11 PM that sounds very much like a (in addition to everything else) Contact The Manufacturer kind of situation 06-Feb-20 12:11 PM assuming there is such an entity 06-Feb-20 12:11 PM Long since bankrupt I believe 06-Feb-20 12:11 PM If anybody has pdfs on their computers related to an Interserv Electromask II, I would be forever grateful 06-Feb-20 12:11 PM lol 06-Feb-20 12:13 PM the way it works is usually "jigs and good luck" 06-Feb-20 12:13 PM @idmb does lasery aligny work 06-Feb-20 12:15 PM Idmb, if you have any insight, I'm happy to take it to an on topic channel or offline in DMs 06-Feb-20 12:15 PM But I also wanted to share my pain just in case anybody else was having a bad Thursday and wanted to know that it could be worse 06-Feb-20 12:15 PM what exactly is the optical system? 06-Feb-20 12:17 PM I believe it's a a few HP 10780a receivers and some 10706A Plane Mirror Interferometer and a laser 06-Feb-20 12:17 PM I'm not sure what info is relevant, and what's inconsequential 06-Feb-20 12:18 PM so I generally just work with mirrors + gratings + polarization toys 06-Feb-20 12:18 PM Sounds fun 06-Feb-20 12:18 PM not very familiar with branded kits of stuff 06-Feb-20 12:18 PM Fair, thanks for popping your head in 06-Feb-20 12:19 PM what does the receiver measure? 06-Feb-20 12:20 PM It is a photodetector/preamplifier module which senses the 5501A laser Head beam returning from an interferometer 06-Feb-20 12:20 PM I believe the interferometer splits the beam, it bounces off mirrors on a moving stage, it comes back and recombines and it uses ~physics~ to know how far away thing is 06-Feb-20 12:22 PM the HP thing looks like it has two retros bolted directly to it 06-Feb-20 12:22 PM and is really just a beamsplitter in a fancy box? 06-Feb-20 12:22 PM It sits behind the beam splitters 06-Feb-20 12:22 PM https://www.youtube.com/watch?v=jQRT3yDHv18 06-Feb-20 12:22 PM That's all the same part numbers as on our machine, in a very different configuration 06-Feb-20 12:22 PM We've got that prism/mirror/glass box, and the middle sensor unit, and that $25k laser too 06-Feb-20 12:23 PM that receiver is on a stage 06-Feb-20 12:23 PM but aren't the two things on top and to the right of the "plane mirror interferometer" the retros? 06-Feb-20 12:24 PM Could be 06-Feb-20 12:24 PM Our system has laser leaving that plane mirror, bouncing off the moving stage, and re-entering 06-Feb-20 12:25 PM shouldn't this just be a matter of aligning things such that the signal strength is maximal? like, do that without the beam splitter in the system so you don't get any interference 06-Feb-20 12:26 PM and you have the waveplate? 06-Feb-20 12:26 PM Oh... I know what the problem is 06-Feb-20 12:26 PM are the retros plane mirrors or two mirror retros or three mirror retros? 07-Feb-20 12:28 PM <__ice9#6039> repost 07-Feb-20 12:28 PM <__ice9#6039> Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/Screenshot_20200207-142650-A268D.png 07-Feb-20 12:28 PM <__ice9#6039> got a bit carried away on a side point but thought this might be interesting to others 07-Feb-20 02:44 PM @Mason_Yu so are you just an undergrad?? 07-Feb-20 02:44 PM Yeah, I'm graduating this May though 07-Feb-20 02:45 PM Jeez, you're pretty deep into experimental stuff already it sounds 07-Feb-20 02:45 PM quietly envious 07-Feb-20 02:46 PM Ah I wish I can do more experimental work, but it seems most people are into simulation and modeling stuff in this field. 07-Feb-20 02:46 PM follow your heart, not your wallet 07-Feb-20 02:46 PM lol, I've literally emptied my wallet multiple times due to this server 07-Feb-20 02:46 PM The laser, that auction with the massive turbo, that full range gauge, various bits and bobs 07-Feb-20 02:47 PM . o O (i hear a whole lot of people in the simulation/modeling space end up getting slurped into data science somewhere in the bowels of the tech industry, too, so,) 07-Feb-20 02:48 PM Yeah 07-Feb-20 02:48 PM Need an actual income, so I'm furiously looking for jobs at the moment 07-Feb-20 02:49 PM That's unfortunate, spending government money is a lot more fun 07-Feb-20 02:51 PM i've done a whole bunch of tech interviews and it's always kinda sad when someone's resume is like 'Did realtime data processing for particle physics etc' and has published papers and they're applying to a 'make our ads better' kinda position 07-Feb-20 02:52 PM I'm certainly going to be more focused on what job I'm applying for than the income associated with it, if I can live as a grad student then doubling my income is not that hard 07-Feb-20 02:54 PM I don't really get much of a choice unfortunately. Still on the student visa, so the vast majority of interesting jobs are already impossible for me to apply. So it's more than likely I'll end up sitting behind a desk somewhere doing things unrelated to experiments, I can't even do data analysis on some of this stuff 07-Feb-20 02:55 PM do you not just get PR from graduating? 07-Feb-20 02:56 PM No lol 07-Feb-20 02:56 PM come to Canada, you get that from graduating grad school. Paid 2 year masters 07-Feb-20 03:06 PM <__ice9#6039> It should work like that -___- 07-Feb-20 03:11 PM i kinda wish i could take a couple years off of the whole full-time-job thing to go do school full-time 07-Feb-20 03:11 PM i doubt i could juggle both and keep myself from burning out terribly 07-Feb-20 03:11 PM i miss school, in theory. i never got to have the College Experience 07-Feb-20 03:12 PM I'm pretty burnt out from school at the moment, which is part of why I want to go and work for a while. 07-Feb-20 03:13 PM trade ya :D 07-Feb-20 03:13 PM You definetely don't want my loans and debts lol 07-Feb-20 03:14 PM that is .. probably true 07-Feb-20 03:14 PM the other thought i have a lot is 'i should consider going to school, but not in america' 07-Feb-20 03:14 PM but that's probably much much more complicated 07-Feb-20 03:15 PM Well graduate schools are a lot better with PhD stipends, so I'm eventually going for one someday 07-Feb-20 03:15 PM But not now 07-Feb-20 03:15 PM at least california has some kind of fixed-price community college system, so if i needed to get introductory stuff out of the way, that would be .. not too terrible 07-Feb-20 03:15 PM thousands, instead of tens-of-thousands 07-Feb-20 03:15 PM 'a couple stupid ebay impulse purchases worth of calc 101' 07-Feb-20 06:03 PM @Mason_Yu my wife was on OPT when she started working at Intel, they handled all the visa stuff after that 07-Feb-20 06:03 PM If anyone here wants a recommendation for Intel applications, let me know 07-Feb-20 06:03 PM You just gotta apply and let me know the application number 07-Feb-20 06:04 PM Let's hope a company will be willing to do that for me too. It's certainly tougher in the nuclear engineering field 07-Feb-20 06:04 PM Ah 07-Feb-20 06:04 PM Plenty of vacuum stuff here tho 07-Feb-20 06:04 PM When more than half of the work involves government or military contracts 07-Feb-20 06:05 PM Can always start in a semi related field, pay off those loans as quick as possible, get hired at a startup or start your own/get bought out 07-Feb-20 06:05 PM Or head home :/ 07-Feb-20 06:06 PM I'm afraid the latter is not really an option for me 07-Feb-20 06:06 PM I was able to pay off my loans working at intel in like 3 or 4 years 08-Feb-20 02:07 AM yay 08-Feb-20 02:18 PM back to translating sections of that old german watchmaking (specifically on the spring design) book.. been a while since I opened it up, had to refresh some of the words I once learned, such as Schwerpunkt 08-Feb-20 02:18 PM writing down a small term index in a notebook.. but also working on translating full paragraphs, etc 08-Feb-20 02:18 PM I do have a horological terms dictionary w/ various languages, which is my main source, beyond google translate via phone camera 08-Feb-20 02:21 PM Schwerpunkt is center of mass, or focus in a less literal sense 08-Feb-20 02:21 PM "heavy spot" is sort of what I interpretted it as 08-Feb-20 02:22 PM yeah that's the literal translation 08-Feb-20 02:22 PM center of mass may be better though, not sure yet 08-Feb-20 02:22 PM again, most of this is in review, I brought it up a while ago when I first got the book, and just been consumed too much to continnue with it 08-Feb-20 02:22 PM phone fails to convert Unruhe , dictionary has Unruh (no 'e') as the Balance (wheel? balance complete?).. phone just says Unrube.. fail 08-Feb-20 02:22 PM sometimes it converts it as un-rest 08-Feb-20 02:22 PM which is what it does, I guess 08-Feb-20 02:22 PM anywho, I'll reach out if I get stuck 08-Feb-20 02:45 PM gesetzte Wirkung beobachten können =~ can observe the set effect ... The Opposite Effect? 08-Feb-20 02:45 PM oh crap.. sorry, missing half the first word 08-Feb-20 02:45 PM entgegengesetzte Wirkung.. yeah, opposite 08-Feb-20 02:45 PM it was on the previous page 08-Feb-20 04:12 PM and by way of palpable groping cant be the right translation.... lol.. feeling around was another translation, but still meh 08-Feb-20 05:46 PM Gänge == "gears"/"courses" but I think it's more of rate 08-Feb-20 05:46 PM (verify that for me please) 10-Feb-20 04:17 AM gänge is gears, like in a car 10-Feb-20 04:17 AM if you post the whole sentence context might give some clues 10-Feb-20 05:50 AM I'll continue with next paragraph after school that has it, nearly done with this one chapter, which was a review morandum of a test done elsewhere (not by the author).. I think the next chapter I will actually learn something new 10-Feb-20 06:28 AM This looks neat 10-Feb-20 06:28 AM https://twitter.com/War_Kittens/status/1226384524113780738 10-Feb-20 06:44 PM Guess who's making a coronavirus test at work? This guy! 10-Feb-20 07:30 PM Good luck, friend! 10-Feb-20 08:10 PM @piGuyWould you be willing to share some more details? I'm curious 10-Feb-20 08:24 PM @Mason_Yu I work in an academic research lab that focuses on low cost point-of-care diagnostics for infectious disease. I do device engineering so I've designed a USB-powered instrument for nucleic acid amplification and fluorescence measurement. I work with microbiologists that develop the tests that run on the device. 10-Feb-20 08:25 PM Woah, USB powered? So it must not be a polymerase chain reaction based amplification technique right? 10-Feb-20 08:29 PM <__ice9#6039> PCR doesn't take that much energy if you do it at small scale 10-Feb-20 08:30 PM It's the rapid heating and cooling requirement that's the most challenging I believe. Most of the bigger machines already do it on a fairly small scale to minimize thermal mass, just with lots of vials 10-Feb-20 08:30 PM <__ice9#6039> The cooling might be harder with USB, though you could just use a fan and a heat sink 10-Feb-20 08:30 PM <__ice9#6039> USB max power for battery charging is 25W usually 10-Feb-20 08:30 PM <__ice9#6039> But it varies 10-Feb-20 08:30 PM <__ice9#6039> Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/1581395581241-ADC9D.png 10-Feb-20 08:34 PM Oh, this is how it's done I think 10-Feb-20 08:34 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/unknown-DEF44.png 10-Feb-20 08:34 PM The amplification actually happens at a fairly constant temperature, ~63 degrees celsius 10-Feb-20 08:34 PM https://en.wikipedia.org/wiki/Loop-mediated_isothermal_amplification 10-Feb-20 08:34 PM So not exactly PCR, but close 10-Feb-20 09:55 PM Well there's isothermal PCR 10-Feb-20 09:55 PM And you don't need to cycle temperature on the same physical heater/cooler... Rather you can move the sample between zones held at constant temp 10-Feb-20 09:55 PM Thats actually the way it was done originally, using water baths 10-Feb-20 09:55 PM But surely modern approaches use microfluidics 10-Feb-20 09:55 PM For a more hacker/diy approach there was, for example, lavaAmp 10-Feb-20 09:55 PM (which never made it to production afaik) 10-Feb-20 10:23 PM @__ice9 that brashear silvering process is super cool, seems easier than many of the electroless plating recipes 10-Feb-20 10:24 PM It's isothermal amplification. However, I did recently develop a fast USB-powered PCR machine. 10-Feb-20 10:25 PM This went around recently on the biohacking groups I'm part of https://hackaday.com/2020/01/26/put-the-power-of-pcr-in-your-pocket-with-this-open-source-thermal-cycler/ 10-Feb-20 10:25 PM Not too interesting to me, only 1C/sec (or was it minute, whatever the common time unit is) 10-Feb-20 10:25 PM So not the best ramp rate for side reaction prevention 10-Feb-20 10:26 PM Mine is 3C/sec up and 6C/sec down, and it uses a standard USB type-A instead of USB-C 10-Feb-20 10:27 PM like was mentioned, but it is worth repeating, never let the mix from the brashear process silvering dry out 10-Feb-20 10:27 PM it can go boom 10-Feb-20 10:27 PM Ooo, I wondered why 10-Feb-20 10:27 PM I figured it would just get too hard to clean 10-Feb-20 10:27 PM (in a sense, boom is very hard to clean) 10-Feb-20 10:27 PM @piGuy pretty decent, but for isothermal you don't need to ramp more than once up once down, right? 10-Feb-20 10:27 PM Or did you design it for isothermal and cycling? 10-Feb-20 10:27 PM Or those different devices? 10-Feb-20 10:29 PM Different devices 10-Feb-20 10:29 PM At you at the Broad by chance? 10-Feb-20 10:29 PM Isothermal device I did at work. The cycler is my own project. 10-Feb-20 10:30 PM @nmz787 https://en.wikipedia.org/wiki/Silver_fulminate that is produced and it is very touchy 10-Feb-20 10:30 PM (I have a friend at the Broad, doing ebola stuff) 10-Feb-20 10:30 PM Or maybe it's related to the Broad, I can't remember 10-Feb-20 10:30 PM hm, I've never heard of the Broad. What is it? 10-Feb-20 10:30 PM Broad Institute, Harvard/Cambridge 10-Feb-20 10:31 PM Oh, I'm in Seattle 10-Feb-20 10:32 PM Ah 10-Feb-20 10:32 PM Different world 10-Feb-20 10:32 PM "The current commercial use has been in producing non-damaging novelty noisemakers as children's toys and tricks." 10-Feb-20 10:32 PM Sooo, are these the toy gun cap rolls? 10-Feb-20 10:32 PM Can I get some of those and dissolve and plate some mirrors? 10-Feb-20 10:39 PM afaik it is just a byproduct of the mix and not an essential component 10-Feb-20 11:00 PM <__ice9#6039> @nmz787 It's very convenient, but yes, it should not be allowed to dry once mixed-- it works by forming silver fulminate as an intermediate, an unstable and very sensitive primary high explosive, the decomposition of which in solution is responsible for plating silver onto anything it can touch. Any residual that manages to survive the plating process prior to evaporation of the solvent may crystalize out into orange needle-shaped crystals which can explode without warning. Hence, when mirroring is finished, the unused mixed solution should be discarded immediately-- as noted in the article. 10-Feb-20 11:00 PM <__ice9#6039> Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/1581404364951-66F34.png 10-Feb-20 11:00 PM <__ice9#6039> Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/1581404399187-3840A.png 10-Feb-20 11:00 PM <__ice9#6039> Based on the instructions, fwiw, the potential risks would be greater if the wrong ratios or ordering of mixing were used. So it's important to follow them exactly. 10-Feb-20 11:00 PM <__ice9#6039> Given that, though, it's reasonably safe 10-Feb-20 11:00 PM <__ice9#6039> Broad has a very pretty building 10-Feb-20 11:00 PM <__ice9#6039> The human genome project was led by researchers there, primarily 10-Feb-20 11:04 PM But discard means... Let it crystalize in your garbage can for the garbage truck to get the jolt??? 10-Feb-20 11:05 PM <__ice9#6039> Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/1581404722185-5806D.png 10-Feb-20 11:05 PM <__ice9#6039> Goodness no. It means dump it into a bucket of water and then dump that down a sink followed by plenty of water. 10-Feb-20 11:05 PM <__ice9#6039> If you want to be environmentally friendly, it can be neutralized with thiosulfates beforehand 10-Feb-20 11:06 PM Hmm, plating the water pipes seem OK 10-Feb-20 11:06 PM <__ice9#6039> Seems pretty harmless to me tbqh. 10-Feb-20 11:06 PM <__ice9#6039> Process works best if you clean the target surface with nitric acid first apparently 11-Feb-20 09:11 AM @funranium what’s your laser safety suggestion for femtos? 11-Feb-20 12:31 PM Pretty sure my wife's gonna be unhappy with this incubator purchase... 11-Feb-20 12:31 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/JPEG_20200211_123123-876A1.jpg 11-Feb-20 12:31 PM On the other hand, I successfully got through an auction buy that wasn't eBay, and used a wire transfer... 11-Feb-20 12:31 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20200211_123538-50815.jpg 11-Feb-20 12:31 PM That was a stalagmite when i first saw it at the pickup location 11-Feb-20 01:17 PM Cursed image: 11-Feb-20 01:17 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/KF40-125-Volt-15A-Socket-Feedthrough-400x2-B5AAB.png 11-Feb-20 07:47 PM @imdb femtosecond and other ultrafast lasers are annoying from a laser safety POV. First, enclose it as much as possible so that you don't even need to worry. Second, absorptive dyes are prone to bleaching, sometimes permanently, as the dyes saturate. Your OD of 7+ may suddenly drop to 2, perhaps never recovering. Thin film coated eyewear recommended. Third, if you're using the ultrafast system to make a supercontinuum system, you're no longer safe with the thin film style because that will only help with a fraction of the bandwidth. In short, they're tough to control short of box that bad dog up. 11-Feb-20 08:19 PM Probably should have put that in #lasers_and_optics. Lemme cross post this bad dog. 12-Feb-20 03:10 PM VISA life sounds unfun 12-Feb-20 03:11 PM Yup 12-Feb-20 03:29 PM I have Canadian and British citizenship 12-Feb-20 03:29 PM So brexit is a lil bit of a nuisance 12-Feb-20 03:29 PM But it’s weird that being born somewhere isn’t something you can take for granted 12-Feb-20 03:30 PM Being born in a dead end country is what sucks most 12-Feb-20 03:39 PM meanwhile the "real" physicist peers of mine aren't happy with canadian options and went to the states 12-Feb-20 03:54 PM Isn't Canada where that one fusion experiment is happening? 12-Feb-20 03:54 PM Ideally I'd move to the US, maybe Canada 12-Feb-20 03:54 PM and run a heavily hardware oriented business 12-Feb-20 03:56 PM Yeah, here we go: https://en.m.wikipedia.org/wiki/General_Fusion 12-Feb-20 04:00 PM Ah general fusion... I really don't know why people are pouring so much money and resources into it when the results are just... not there 12-Feb-20 04:00 PM I'm content enough right now with my VISA life. If you are F1 they give you sufficient time to win the lottery 12-Feb-20 04:01 PM Diploma mills are frowned upon 12-Feb-20 04:01 PM 3 years after graduation for undergrad, another 3 for graduate 12-Feb-20 04:02 PM (fusion R&D also has at least a couple big defense implications. e.g. inner wall survivability and the materials science that goes into that is also a huge boon for, like.. reentry vehicles) 12-Feb-20 04:05 PM I haven't heard about D-wave in like a year 12-Feb-20 04:06 PM lol d-wave 12-Feb-20 04:06 PM they're pretty near to General Fusion 12-Feb-20 04:06 PM FLIR is in town too 12-Feb-20 04:06 PM FLIR is good 12-Feb-20 04:06 PM Not quite the same kind of tech though 12-Feb-20 04:06 PM FLIR charges everyone through the nose 12-Feb-20 04:07 PM yes 12-Feb-20 04:07 PM but the stuff is nice 12-Feb-20 04:07 PM equal-opportunity gougers 12-Feb-20 04:07 PM give $$$ get nice thing 12-Feb-20 04:07 PM oh yeah 12-Feb-20 04:07 PM I have a T440bx 12-Feb-20 04:07 PM very nice, but the software is laggy garbage 12-Feb-20 04:07 PM oh yeah 12-Feb-20 04:07 PM their drivers are terrible 12-Feb-20 04:07 PM the python SDK is ok 12-Feb-20 04:07 PM their on-camera software is garbage too 12-Feb-20 04:07 PM I just use the NI stuff and run it through labview though 12-Feb-20 04:08 PM i saw a whole bunch of chinese knockoff microbolometer cameras when i was shopping for my E4, kinda surprising but cool that they're getting in on that 12-Feb-20 04:08 PM have you installed my hack on your E4 12-Feb-20 04:08 PM the software that my E4 runs is so painful. windows CE D: 12-Feb-20 04:08 PM >.> 12-Feb-20 04:08 PM yes 12-Feb-20 04:08 PM lol 12-Feb-20 04:08 PM heh 12-Feb-20 04:08 PM @Spirit you could go be a vacuum scientist for D-wave 12-Feb-20 04:08 PM but will they hire me 12-Feb-20 04:08 PM sure why not 12-Feb-20 04:09 PM "hi, I graduated high school in a country I've spent barely a week in, I have no degree and my portfolio is a project and a half, but I can talk about science for hours, job pls?" 12-Feb-20 04:09 PM https://jobs.lever.co/dwavesys/30e97655-99b8-4862-bd11-06c1bf4e7f9f 12-Feb-20 04:09 PM You never know, why not try? 12-Feb-20 04:09 PM D-wave seems like a good place to go get a job that won't last another 10 years lol 12-Feb-20 04:10 PM That's still okay, as long as they still have some money 12-Feb-20 04:10 PM d-wave would probably look great on a resume 12-Feb-20 04:10 PM IBM is doing well on the quantum computing front 12-Feb-20 04:10 PM Yup, to executives 12-Feb-20 04:10 PM either great or terrible, depending on how things look in 10 years >.> 12-Feb-20 04:11 PM Honestly, as far as I understand D-waves take on quantum is... Lets do it shittier... but just do it a bunch more to MAYBE average out the same answer as what others are going for with more complex and proper implementations. 12-Feb-20 04:11 PM 10 years is plenty for anyone really 12-Feb-20 04:11 PM Its just like... ugh... what a joke 12-Feb-20 04:11 PM I guess they can't figure out how to implement things better so instead of chasing quality they are chasing quantity 12-Feb-20 04:12 PM D-wave's marketing / ways of getting funding are potentialy jokey, but it's no Theranos 12-Feb-20 04:12 PM which makes sense from a marketing perspective ONLY, the number of qbits was a big talking point for awhile 12-Feb-20 04:12 PM Quantum annealing is still useful... For some stuff... But it's clearly only capable of being an intermediate step / not the end goal 12-Feb-20 04:13 PM What kind of qubits do they use? 12-Feb-20 04:13 PM quantum computational chemistry has always seemed like a super interesting application 12-Feb-20 04:14 PM I went to a lecture last year by someone who does computational chemistry 12-Feb-20 04:14 PM which was basically talking about how much of a joke a lot of people pumping quantum computers for it is, and that a lot of their examples for where it would be "necessary" were actually achievable with minimal classical computer time 12-Feb-20 04:15 PM looks like they use josephson junction flux qubits 12-Feb-20 04:15 PM that's unfortunate 12-Feb-20 04:15 PM not surprising, but unfortunate 12-Feb-20 04:15 PM defense, defense, defense, ads, defense 12-Feb-20 04:15 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/Screen_Shot_2020-02-12_at_4.16.24_PM-720B9.png 12-Feb-20 04:17 PM the person giving the talk has spent a lot of time with D wave computers too 12-Feb-20 04:17 PM like they believe in quantum computation and all, as one should 12-Feb-20 04:17 PM but just were very clear about how it's hyped up weirdly 12-Feb-20 04:17 PM I went to a talk recently about the technology at work, and like... I think they don't understand lol 12-Feb-20 04:17 PM Like obviously right now, or even in the next while is it going to surpass what we can do in classical 12-Feb-20 04:17 PM and the uses are far and few between 12-Feb-20 04:18 PM it's not at all a dead-end industry though 12-Feb-20 04:18 PM but on paper it should do what classical computers can do with less "bits" of memory and as such in less time since less information is needed to be moved 12-Feb-20 04:18 PM and generally less steps are needed to be taken 12-Feb-20 04:18 PM there are apparently a lot of great books on all the math and such 12-Feb-20 04:18 PM its a lot of matrix math and spheres and yea it numbs the mind 12-Feb-20 04:20 PM it benefits problems with enormous state spaces 12-Feb-20 04:20 PM so a big boon to big data processing 12-Feb-20 04:21 PM IE: IBM 12-Feb-20 04:21 PM :P 12-Feb-20 04:21 PM er well IBM's customers 12-Feb-20 04:50 PM Ha, just got a $2/hr raise after negotiations 12-Feb-20 04:50 PM That will certainly pay for a certain something I'm about to buy 12-Feb-20 04:52 PM congrats :D 12-Feb-20 04:55 PM Quantum computers are amazing at (or you could say, only good at) optimization problems. Reformulating a general computational task into that is very challenging and in fact cannot be done for every possible task 12-Feb-20 04:55 PM With more qubits, that process becomes somewhat easier and can apply to more problems 12-Feb-20 04:55 PM But if your computer just won't give you a right answer, or just scales vastly inferior to other approaches it's quite meaningless 12-Feb-20 05:06 PM Heh, I know a local company looking to hire a vacuum hacker for $20/hour.. no visa sponsorship tho 12-Feb-20 05:06 PM I'll work for $15 if they sponsor a visa :P 12-Feb-20 05:06 PM People are out here negotiating raises, I'll negotiate a pay cut 12-Feb-20 05:09 PM At least I don't think you'll be hurt by the country quota for the H1-B 12-Feb-20 05:09 PM The issue is that sponsoring a visa is H1-B afaik 12-Feb-20 05:09 PM I feel like some of the "skill" issues don't apply to people who aren't looking to come and do grunt work 12-Feb-20 05:09 PM (read: us) 12-Feb-20 05:13 PM I would make $13 an hour if I only worked 40 hours a week 12-Feb-20 05:13 PM You could try to win the ultimate lottery: https://en.wikipedia.org/wiki/Diversity_Immigrant_Visa 12-Feb-20 05:13 PM Oh yeah I forgot to apply in 2019 12-Feb-20 05:13 PM need to set a timer for 2020 :P 12-Feb-20 05:14 PM Woah I didn't know I am eligible too! 12-Feb-20 05:14 PM pretty much every country is 12-Feb-20 05:15 PM Not China 12-Feb-20 05:15 PM China is overflowing with people 12-Feb-20 05:16 PM I kinda assumed they just lumped everyone together just so China won't get mad at some of her "cities" and "provinces" getting preferential treatment 12-Feb-20 05:16 PM I'm going to assume it's hidden under "diversity" 12-Feb-20 05:16 PM But for sure there's going to be a spike in applications from HK 12-Feb-20 05:17 PM are you native HK? 12-Feb-20 05:17 PM Yep 12-Feb-20 05:17 PM Neat 13-Feb-20 10:08 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/unknown-86CAD.png 13-Feb-20 10:08 AM Can someone help me decide whether to route my water lines from my turbopump to the water source or the distribution panel? 13-Feb-20 10:08 AM Is it electrical? 13-Feb-20 10:09 AM facts: we have a flow rate limiter at the water source, with a beefy water pump. The lines between the source and distribution panel are also super beefy and can handle a huge load. 13-Feb-20 10:09 AM Electrical? 13-Feb-20 10:09 AM the distribution panel 13-Feb-20 10:10 AM No it's just a manifold with flow meters and pressure gauges 13-Feb-20 10:10 AM and valves 13-Feb-20 10:10 AM and quick disconnects already on it 13-Feb-20 10:10 AM I'd route there then 13-Feb-20 10:11 AM it just feels so weird to make the path so much longer 13-Feb-20 10:11 AM as long as it flows well 13-Feb-20 10:12 AM It's ~12C and the pump only needs 1 L/min at 35C 13-Feb-20 10:12 AM so it'll chill plenty 13-Feb-20 10:12 AM you don't want to chill it too far 13-Feb-20 10:13 AM It won't 13-Feb-20 10:13 AM 1L/min is acceptable at 10-35C 13-Feb-20 10:13 AM huh, leybold even have a dewpoint diagram 13-Feb-20 10:13 AM lovely 13-Feb-20 10:14 AM oh, 12, not -12 13-Feb-20 10:14 AM I'm blind 13-Feb-20 10:15 AM tilde-life 13-Feb-20 10:15 AM /sim 13-Feb-20 10:15 AM anyways another factor that might have pushed you to the same conclusion 13-Feb-20 10:15 AM is that going directly to the water source would involve going over a laser / optical table 13-Feb-20 10:15 AM but those other beefy lines do that anyways 13-Feb-20 10:52 AM Damn, UPS emails lack specific wording to explain their delivery time for overnight shipping is a window..... And I missed the package delivery :( 13-Feb-20 10:52 AM And since LDS vacuum doesn't provide a real shipping quote, it turned out to be $75 not $39 13-Feb-20 10:52 AM So wasted a bunch of money for nothing, wasted 25 minutes of my life on call with UPS complaining and trying to get them to deliver to the UPS store today or refund the difference between 2nd day shipping 13-Feb-20 10:52 AM The woman just kept saying "it's a system generated email" and had nothing reasonable to say when I said "well yeah but the template was engineered by humans and a management chain that approved it" 13-Feb-20 02:34 PM Hey @funranium, can I get a sanity check here? If I diffuse a laser through a really thick, random diffuser(wad of tissues), with zero possibility for direct hits, it's safe, right? 13-Feb-20 02:35 PM until it sets your tissues on fire 13-Feb-20 02:38 PM it's not focused at the output either 13-Feb-20 02:38 PM I just need a model diode to test the new driver I designed with 13-Feb-20 02:38 PM and I don't want to wear gogs like a doofus while probing a fingernail sized pcb 13-Feb-20 02:38 PM it's diffuse and I can barely see it, which is a-ok with me as an indication of "hey it works" 13-Feb-20 03:17 PM The answer, as always, is “It depends”. In this case on wavelength and power. Frosted lucite ball from TAP Plastics might be more betterer for you. 13-Feb-20 03:17 PM These are what we use as terminators for display at trade shows. 13-Feb-20 07:13 PM Today in regulatory fun, TFW you have to tell a rather gifted interdisciplinary researcher that they have some very neat ideas for using lasers to do rapid prototyping of prosthetics and such are technically speaking doing human use experiments and they can't do anything until they get the blessing of the Human Use Committee. And that that will take at least a year for that blessing. But I will do my very best to make sure they have absolutely everything squared away so they get approved as fast as possible and are ready to go the instant that approval drops. 13-Feb-20 07:16 PM Are they external mountable prosthetics, or implantables? 13-Feb-20 07:16 PM If it's the former, seems iffy. You shouldn't need a year to prototype a leg or something. 13-Feb-20 07:17 PM You need it to be allowed to work with people. 13-Feb-20 07:17 PM And all of the above. 13-Feb-20 07:18 PM still BS if you need approval to prototype something purely mechanical 13-Feb-20 07:18 PM if it was invasive, yes, 100% for rigorous approval 13-Feb-20 07:18 PM invasive or potentially dangerous 13-Feb-20 07:19 PM can they still do the fabrication without ever letting a human try to use the test pieces? 13-Feb-20 07:19 PM These rules exist thanks to Mengele. Thou shall not experiment on people, for ANYTHING, without some fairly rigorous review. @LRM yes they can. 13-Feb-20 07:19 PM ahhh at least it isnt one of those horrible regulatory/institutional oversight things that shut it down completely 13-Feb-20 07:19 PM good luck doing any iterative design without human testing on a prosthesis though 13-Feb-20 07:20 PM well it depends what kind of work they are doing...if it is just working on using laser sintering thats one thing 13-Feb-20 07:20 PM you design a nice and useful... I don't know, leg, the kind that slips over a stub, but you need to wait a year to know it chafes 13-Feb-20 07:20 PM if it involves specific prosthetics thats another issue all together 13-Feb-20 07:20 PM yeah a friend of mine just got some fancy prosthetics lately 13-Feb-20 07:21 PM Welcome to where medical and research ethics meet engineering and it's general lack of them. 13-Feb-20 07:21 PM things are a lot easier, oversight wise, when nothing living or feeling is involved 13-Feb-20 07:27 PM Researcher has a lot of documentation of their capabilities, their proposed work, all the consent lined up and making sure they have enough latitude to work without having to go back to the Human Use Committee on a regular basis. Which is why it's takes the better part of a year, pretty much everywhere. 13-Feb-20 07:31 PM that makes sense, gotta err on the side of caution especially with institutional liability involved 13-Feb-20 07:33 PM I mean, you have to go through the Human Use Committee for psych and sociology work for ethical review under Dept. of Health & Human Services' Common Rule. SEE ALSO: not repeating the Stanford Prison Experiment. 13-Feb-20 07:52 PM I’m pretty sure a non-negligible number of tenured PIs would just do it anyways ? Or not even have brought it up 13-Feb-20 08:09 PM The classic “I don’t need to bother with ethics approval because I already know anything I do is ethical” 13-Feb-20 08:49 PM The human use committees are made up of your tenured peers and the general counsel. PIs who do this don’t just get slapped on the wrist; they can cost EVERYONE their ability to do work as the NIH or NSF yanks grants to an entire institution with great speed. You want to know how you can actually lose tenure in America? This is one of the few ways. 13-Feb-20 08:49 PM Pull this in Europe, where they are a bit more excited about Mengele angle, and criminal charges hit quick. 13-Feb-20 10:26 PM Has that ever happened to an upper tier institution? 13-Feb-20 10:27 PM Yes. During my time at Cal in fact. 13-Feb-20 10:27 PM The yanking of all grants I meant 13-Feb-20 10:27 PM Not the firing 13-Feb-20 10:29 PM Also, yes, from an entire department, for months, though for playing fast and loose with animal use/transgenics not human use. Also got to be present/partially responsible for a national lab standing down all plutonium and beryllium work for ~18mo. 13-Feb-20 10:31 PM That’s good I guess 13-Feb-20 10:31 PM The reason the faculty committees have power is that they are the people best qualified to review work and are also the most effected parties if someone goes hawg wylde. 13-Feb-20 10:32 PM I wish there was more stuff allocated towards safety 13-Feb-20 10:32 PM They have a vested interest in making sure that what is approved passes the straight face test and that no one threatens everyone else's work. 13-Feb-20 10:33 PM IDK how much it matters when the construction / carpentry / building managers ignore every single safety sign on lab doors 13-Feb-20 10:33 PM (The safety stuff) 13-Feb-20 10:33 PM Me having proper goggles doesn’t net help if someone comes in to service the hvac without contacting us prior 13-Feb-20 10:34 PM Believe me, so do I. I also am a one man crusade trying to get my fellow safety professionals to not play cop. The philosophy I keep teaching wrt research safety is "The answer is never no, but it may take a great deal of effort to get to yes." As for the trades, they usually get ignored by the institution and they get injured because of that. 13-Feb-20 10:34 PM But on a practical training note, the tradesfolk tend to learn REALLY QUICK when a hazard is demonstrated to them. Only have to have a carpenter get his butt stuck to an NMR unit once to have the entire group learn that lesson. 13-Feb-20 10:37 PM We have this silly unistrut frame over our laser 13-Feb-20 10:37 PM This morning I arrived to turn it on and they had put plywood over that and were cutting part of the hvac shaft 13-Feb-20 10:37 PM That is considerate of them to try to keep dust from raining on the optics. 13-Feb-20 10:38 PM The plywood was a seat 13-Feb-20 10:38 PM The optics are all acrlyiced in 13-Feb-20 10:38 PM But the IR beam goes into a big shiny vacuum chamber 13-Feb-20 10:38 PM And happened to be off 13-Feb-20 10:38 PM Is there any good signage that works? 13-Feb-20 10:38 PM We have almost too many safety signs I feel 13-Feb-20 10:38 PM Also how do you feel about a “fume hood” made out of a server rack with a huge fan in the top going to the roof exhaust? 13-Feb-20 10:38 PM With SO2 and OCS cylinders in it and little things of Benzene / benzene-based things “sealed” 13-Feb-20 10:42 PM I feel...not great. 13-Feb-20 10:42 PM As far as signage that works, I created this to sarcastically add to a door that people kept blowing through. 13-Feb-20 10:42 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/READ-68D9E.jpeg 13-Feb-20 10:43 PM oh, fume rack, cute 13-Feb-20 10:43 PM i've worked with some server hardware that could've used that 13-Feb-20 10:43 PM (sparkle brand power supplies are, in fact, true to their name) 13-Feb-20 10:47 PM When you have a lot of different hazards in your space, the general rule is isolate it to as small an area as possible and post that specific area so people deal with what immediately effects them. Posting everything for a large room on the doors means you're more or less wallpapering. Yes, people are supposed to read that every time to make sure nothing has changed, but people are people which is to say lazy and complacent. If you have visitors to your space, especially a laser lab, they are not supposed to be making unescorted entry for the very simple reason that an occupant of the space needs to tell the visitor what hazards are present and where. That's basic hazards communication. 13-Feb-20 10:47 PM Or, alternatively, you need a way to easily show at entry that none of your posted hazards are currently present and that the space is safe to enter. 13-Feb-20 10:47 PM As everyone is probably aware, this is a lot easier said than done. 14-Feb-20 04:09 AM Interestingly the professor I first worked under at University for a few years, ended up getting into 3d printed prosthetics after I graduated and left, and I think this lead to something something... and all I know is I was surprised he left the university (probably via LinkedIn in job change or something) because I'm pretty sure he got tenure while I was there. 14-Feb-20 06:20 AM There’s literally a reticule on one of the doors (two, actually) because people used it for far-field beam alignment 14-Feb-20 06:20 AM We have a “DANGER: Cheap IC sockets” sign on the office door 14-Feb-20 06:35 AM Well that is a real danger to sanity and patience. 14-Feb-20 06:38 AM oh and the "server rack" has been in use for nearly a decade / seen by the safety officer, not really sure how/why 14-Feb-20 06:38 AM all I know is I have banished it to the back room 14-Feb-20 06:38 AM I also mentioned that you're not supposed to ride in an elevator with LN2 and was told by the lab tech "In soviet russia I was on a plane with a huge supply of LN2, this is nothing" 14-Feb-20 08:33 AM [shakes head in despair] “Door as beam stop” is one of those classic DON’T DO THAT things that I’m pretty glad to say I haven’t encountered in several months. Usually a new grad student that came from somewhere with a laser cowboy safer culture. That, incidentally, is what $major_laser_manufacturer was like when I got there as tech in the long, long ago. 14-Feb-20 08:42 AM is it safer if they add their own deadbolt to the inside so the door can't be opened from the outside? 14-Feb-20 08:44 AM That makes the fire marshal almost as sad as when you chain the laser lab doors shut. 14-Feb-20 08:46 AM is chaining them shut a thing? 14-Feb-20 08:46 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/unknown-3FEE7.png 14-Feb-20 08:46 AM In "fairness" the door they were doing this to is the blue one 14-Feb-20 08:46 AM where green things are doors, and red things are exits to the outdoors 14-Feb-20 08:46 AM so it would be a very weird fire to want to go IN through the blue door 14-Feb-20 08:46 AM but yeah that deadbolt is long gone 14-Feb-20 08:46 AM Are rat traps in a laser lab a no-no for some reason? 14-Feb-20 08:57 AM Door lock was broken, it was an infrequently used door so they figured chains were fine rather than fixing it. NARRATOR: the fire marshal did not think it was fine Rat traps are fine as far as I know, although I just shuddered at the idea of a rat scampering across my Newport table. 14-Feb-20 09:59 AM they've caught two in five years 14-Feb-20 01:08 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/unknown-A4EE5.png 14-Feb-20 01:08 PM I thought making a datasheet would be easy 14-Feb-20 01:08 PM I don't know what to put here without plagiarizing other manufacturers 14-Feb-20 01:09 PM just put test data graphs with testing schematics 14-Feb-20 01:09 PM forget the norms 14-Feb-20 01:09 PM put what us users actually want lol 14-Feb-20 01:09 PM this needs to be a proper datasheet with specs and stuff 14-Feb-20 01:09 PM needs 14-Feb-20 01:10 PM limits, conditions, etc 14-Feb-20 01:10 PM send me 100 and I'll perform destructive testing for you 14-Feb-20 01:10 PM lol 14-Feb-20 01:10 PM this thing is pretty self-protecting 14-Feb-20 01:10 PM though it does get quite toasty when running at full power with no heatsink 14-Feb-20 02:33 PM Extremely stable, UL classified as "less flammable" surely a ringing endorsement 14-Feb-20 02:39 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/unknown-27B6C.png 14-Feb-20 02:39 PM Any opinions? 14-Feb-20 02:39 PM (WIP) 14-Feb-20 02:41 PM your driver is adorable 14-Feb-20 02:41 PM that is all 14-Feb-20 02:41 PM "Best in class power density" 14-Feb-20 02:42 PM oh yeah that's a good idea 14-Feb-20 02:42 PM "Best in class overal solution volume" 14-Feb-20 02:42 PM where do I put that 14-Feb-20 02:42 PM hm 14-Feb-20 02:42 PM And I'd use Spirit.re as the title instead of Spirit's lab 14-Feb-20 02:42 PM But that's just me 14-Feb-20 02:42 PM needs a choking hazard warning 14-Feb-20 02:42 PM more graphs, more tables 14-Feb-20 02:42 PM graphs and tables will be at the bottom and on page 2 14-Feb-20 02:42 PM ya 14-Feb-20 02:42 PM spirit's lab is a working title since I don't actually have a company or anything 14-Feb-20 02:42 PM but I need to make a datasheet since I want to sell these through our local electronics store, who might work with me to do small runs 14-Feb-20 02:43 PM near zero --> "ultra low" 14-Feb-20 02:43 PM good point 14-Feb-20 02:43 PM I have just read tons of datasheets 14-Feb-20 02:44 PM as have I but I don't want to just come up with a clone of lintech or max or whatever's datasheets 14-Feb-20 02:44 PM seems cheap 14-Feb-20 03:00 PM I want graphs 14-Feb-20 03:00 PM I have some scope plots 14-Feb-20 03:00 PM noise figures and soft start 14-Feb-20 03:00 PM but I don't have an efficiency graph 14-Feb-20 03:01 PM Efficiency graphs suck to do by hand 14-Feb-20 03:01 PM especially if you want them in vector 14-Feb-20 03:01 PM A friend had 2x HP 6632B + Python for plotting those 14-Feb-20 03:02 PM but yeah I have a programmable psu that I can bolt USB onto(korad without the usb option), a usb 40k count logging multimeter, oscope with usb connection 14-Feb-20 03:02 PM all I'm missing is a usb linear electronic load 14-Feb-20 03:03 PM where does the name come from 14-Feb-20 03:03 PM uDriver Pico 14-Feb-20 03:03 PM my butt 14-Feb-20 03:03 PM I just imagined it 14-Feb-20 03:03 PM initially it was uDriver, but that still hasn't even arrived from China 14-Feb-20 03:03 PM but styropyro really wanted this particular driver so he paid for the german fab and it arrived quickly 14-Feb-20 03:04 PM the HP 6632B (and 6632A) PSU's can also sink current. 14-Feb-20 03:04 PM what's the difference between the two? 14-Feb-20 03:04 PM Which makes them so nice 14-Feb-20 03:04 PM size and power rating 14-Feb-20 03:04 PM if I design an even smaller one, it'll be femto 14-Feb-20 03:05 PM "smollest of smols driver" 14-Feb-20 03:05 PM this one is technically the world's smallest already 14-Feb-20 03:05 PM I wish I had more, I only have a single HP 6632B 14-Feb-20 03:05 PM but why stop at the world's smallest when you can beat your own record 14-Feb-20 03:05 PM As I was a bit late to the game and mostware sold 14-Feb-20 03:05 PM And I did not have that much extra cash 14-Feb-20 03:06 PM there's quite a few of them on ebay 14-Feb-20 03:06 PM most parts only :< 14-Feb-20 03:06 PM they also can't do constant resistance 14-Feb-20 03:06 PM or constant voltage drop 14-Feb-20 03:06 PM A local electronics hobbyist (well also a professional, as he designs stuff for a living) bought like 10-30pcs of HP 6632B and 3362B PSU's 14-Feb-20 03:06 PM I paid 110eur for my HP 6632B 14-Feb-20 03:06 PM 3362A was like 90eur 14-Feb-20 03:06 PM When at the time the Agilent 3362B PSU retailed for around 2500eur... 14-Feb-20 03:09 PM yeah it looks like the 6632 is a really nice supply but it can basically only sink current 14-Feb-20 03:09 PM which is nice and all, but not a full load 14-Feb-20 03:09 PM god please 14-Feb-20 03:09 PM don't use the prefixes arbitrarily 14-Feb-20 03:10 PM which prefixes 14-Feb-20 03:10 PM The 6632? 14-Feb-20 03:10 PM micro pico 14-Feb-20 03:10 PM femto 14-Feb-20 03:10 PM Oh 14-Feb-20 03:10 PM it's just a name 14-Feb-20 03:10 PM that pertains to the size 14-Feb-20 03:10 PM cc/3 14-Feb-20 03:11 PM hm? 14-Feb-20 03:12 PM get it down to 0.33 cm^3 14-Feb-20 03:12 PM with a thinner pcb I can 14-Feb-20 03:12 PM cc/3 driver 14-Feb-20 03:12 PM as a form facter 14-Feb-20 03:12 PM lol 14-Feb-20 03:12 PM heh 14-Feb-20 03:12 PM "What kind of driver do you have?" "No clue, but it's a third of a milliliter!" 14-Feb-20 03:20 PM @Laughing HP 6632. It's a power supply from HP/Agilent, possibly also Keysight. 14-Feb-20 05:32 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/unknown-370C4.png 14-Feb-20 05:32 PM More progress 14-Feb-20 05:32 PM This is starting to look like a real datasheet now 14-Feb-20 05:33 PM yep! 14-Feb-20 05:33 PM Feels like I'm missing something on page 1, before going to pinouts/graphs/connection instructions on 2 14-Feb-20 05:34 PM "typical efficiency" sounds more like osmething I have read before 14-Feb-20 05:34 PM Typical applications! :D 14-Feb-20 05:35 PM I feel like that doesn't quite apply here 14-Feb-20 05:35 PM since this is already a product with a specific purpose 14-Feb-20 05:36 PM Yeah 14-Feb-20 05:51 PM very narrow enable voltage isn't it? 14-Feb-20 05:51 PM minimum threshold 14-Feb-20 05:51 PM it's Vin + 0.2 14-Feb-20 05:51 PM ahh 14-Feb-20 05:51 PM great 14-Feb-20 05:51 PM I still hate the name 14-Feb-20 05:52 PM trust me, the laser guys will love it 14-Feb-20 05:52 PM they buy stuff like "micro flexdrive v5" 14-Feb-20 05:52 PM the pico just doesn't belong 14-Feb-20 05:52 PM the pico is one in a series 14-Feb-20 05:52 PM microdrive will be a series 14-Feb-20 05:52 PM nano(the one coming from China), pico(this), femto(because why not) 14-Feb-20 05:53 PM I'm ok with micro because the components are micrometer-scale 14-Feb-20 05:53 PM like you would measure with a micrometer scale caliper 14-Feb-20 05:54 PM I wanted a more generic series name 14-Feb-20 05:54 PM I'm not saying it's worse than the regular laser naming schemes 14-Feb-20 05:54 PM why not just do it based on volume/area then? 14-Feb-20 05:54 PM like an engine 14-Feb-20 05:54 PM 5V1A0.37CC 14-Feb-20 05:55 PM because nobody is going to buy a "5v1a0.37cc" 14-Feb-20 05:56 PM be the change 14-Feb-20 05:56 PM I will follow the trends steadfast and rake in the profits 14-Feb-20 05:56 PM (not) 14-Feb-20 05:56 PM think of the venn diagram 14-Feb-20 05:57 PM idmp, so how do you feel about microATX, mini-ITX and nano-ITX computer motherboard standards? 14-Feb-20 05:57 PM Mini = fine 14-Feb-20 05:57 PM Extended = fine 14-Feb-20 05:57 PM mATX 14-Feb-20 05:58 PM This is different because the person picking the name is accessible 14-Feb-20 05:58 PM now I feel obligated to come up with a better name 14-Feb-20 05:58 PM for that 1% chance he'd use it 14-Feb-20 05:59 PM I already have the hardware here ;~; 14-Feb-20 05:59 PM with the name on it 14-Feb-20 05:59 PM Oh 14-Feb-20 05:59 PM well it's still a prototype right 14-Feb-20 06:00 PM yeah butbut 14-Feb-20 06:00 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/unknown-3BBD4.png 14-Feb-20 06:00 PM this feels somewhat empty 14-Feb-20 06:00 PM I'll put a note right under that mentions that the anode and cathode must be electrically isolated, and then a note showing that the enable pullup resistor must be removed to activate that functionality 14-Feb-20 06:00 PM and then... just graphs? 14-Feb-20 06:04 PM Diode anode, Diode kathode? 14-Feb-20 06:04 PM Maybe= 14-Feb-20 06:04 PM yes 14-Feb-20 06:04 PM as labels 14-Feb-20 06:04 PM yeah, done 14-Feb-20 06:04 PM graphs and MECHANICAL DIMENSIONS 14-Feb-20 06:04 PM yes those are very important 14-Feb-20 06:04 PM I'll also need to make a simplified step file 14-Feb-20 06:05 PM and if you feel like joking, old school TI and Philips datasheets have a page "NOTES" :D 14-Feb-20 06:05 PM Possibly also Motorola did that 14-Feb-20 06:05 PM companies that came from paper datasheets :P 14-Feb-20 06:05 PM I think at this rate I'll be able to finish the sheet today and pitch the idea to our electronics store 14-Feb-20 06:07 PM You can always label the datasheet as "preliminary" 14-Feb-20 06:07 PM that's a good idea 14-Feb-20 06:08 PM One field for the datasheet could be maximum reverse voltage 14-Feb-20 06:08 PM none 14-Feb-20 06:08 PM well, 0.2 14-Feb-20 06:08 PM the driver will automatically turn off if it sees reverse on the diode 14-Feb-20 06:34 PM How small of a parcel is allowed ? 14-Feb-20 06:34 PM hm? 14-Feb-20 06:35 PM Can you just wrap the bare PCB in a stamp and have at it? 14-Feb-20 06:35 PM can put it in a letter 14-Feb-20 06:35 PM but small packets cost about as much and come with bubblewrap 14-Feb-20 06:37 PM Ugh the name 14-Feb-20 06:37 PM you want one don't you 14-Feb-20 06:38 PM What if someone makes one smaller than your femto 14-Feb-20 06:38 PM good luck to them is all I can say 14-Feb-20 06:38 PM Hey does it bother you that some people use RJ45 as a power cable? 14-Feb-20 06:39 PM half the vacuum industry 14-Feb-20 06:39 PM Power and pirani gauges 14-Feb-20 06:39 PM But also CHIME uses a lot for other stuff 14-Feb-20 06:40 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/unknown-493E7.png 14-Feb-20 06:40 PM too paragraphy? 14-Feb-20 06:41 PM Nah 14-Feb-20 06:41 PM Do you have a plan for how to mount it? 14-Feb-20 06:42 PM the mousebites will always be present 14-Feb-20 06:42 PM But it can always just slide into a host 14-Feb-20 06:42 PM it's tiny and efficient enough to not need heatsinking 90% of the time 14-Feb-20 06:43 PM But in terms of shorts? 14-Feb-20 06:43 PM see, they are paragraphy 14-Feb-20 06:43 PM I explained exactly that in the connection note 14-Feb-20 06:44 PM Which part? 14-Feb-20 06:44 PM that it must be isolated 14-Feb-20 06:44 PM Yeah 14-Feb-20 06:44 PM That’s why I was wondering why you said just slide it in a host 14-Feb-20 06:45 PM Thermally conductive adhesive may be used to transfer heat while preventing shorts. 14-Feb-20 06:45 PM Added this 14-Feb-20 06:45 PM it only generates maybe a 200-500mW of heat when pushing 5W out from a very unfavorable voltage supply 14-Feb-20 06:45 PM (very low or very high) 14-Feb-20 06:45 PM but because it's so tiny it can get quite toasty 14-Feb-20 06:45 PM I haven't done any "to failure" thermal analysis yet, but I will eventually 14-Feb-20 06:45 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/unknown-45FF3.png 14-Feb-20 06:45 PM altered the design a bit to add lots of clearance for metal 14-Feb-20 06:53 PM Can I get a Peta 14-Feb-20 07:12 PM @rfs oh, I'm aware, I was wondering what idmb was talking about at the time. 14-Feb-20 07:12 PM Also: Hi, I'm EE graduate and I'm really really mad about transistors. Buy this book so you don't go insane like I did: https://www.amazon.com/gp/product/0911908226/ref=dbs_a_def_rwt_bibl_vppi_i1 14-Feb-20 07:56 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/datasheet-81F53.pdf 14-Feb-20 07:56 PM Preliminary done! 14-Feb-20 07:56 PM Thoughts? 14-Feb-20 07:56 PM Aside from the contrast on the scope plot divisions, I think everything is alright 15-Feb-20 02:02 AM https://twitter.com/martinjones78/status/1228371357416742913?s=19 15-Feb-20 06:34 AM @Spirit Looking good! 15-Feb-20 11:05 AM Worked out a deal with our local electronics store 15-Feb-20 11:05 AM We're doing a test run of 10 units in China, but buying the ICs and soldering them on here to prevent cloning 15-Feb-20 11:06 AM Sounds like a good plan 15-Feb-20 11:06 AM Hopefully it sells well 15-Feb-20 11:14 AM The "diode needs to float or battery needs to float" thing is the stumbling block I see. 15-Feb-20 11:14 AM Repeatedly 15-Feb-20 11:14 AM And without mercy 15-Feb-20 12:34 PM Told ya people would have problems with that floating thing 15-Feb-20 12:34 PM I think picodrive is taking attention from the more "mass market" microdrive 15-Feb-20 12:56 PM The other microdrive isn't here yet and it will be called nano 15-Feb-20 12:56 PM but yeah floating seems to be a contentious point 15-Feb-20 01:04 PM it's not even that floating is bad 15-Feb-20 01:04 PM it's just that it adds something to think about / figure out 15-Feb-20 01:20 PM Yeah it's a bit of a challenge to use 15-Feb-20 01:20 PM But that's what you get for choosing a space premium 15-Feb-20 01:21 PM Yeah 15-Feb-20 01:21 PM I'd call the picodrive more of an "enthusiast" product 15-Feb-20 01:22 PM I really don't get why not quickly design a 3D printable picodrive host 15-Feb-20 01:32 PM I could 15-Feb-20 01:32 PM when it's ready for release 15-Feb-20 01:41 PM aka next week? 15-Feb-20 01:43 PM who knows, the guy doing the local shop manufacture said we'll get numbers monday-thursday 15-Feb-20 01:43 PM probably a week or two for China manufacture 15-Feb-20 02:27 PM @Spirit when you say a China run, but assembly local, are you just getting the PCBs made in China then? 15-Feb-20 02:27 PM they're doing most of the assembly but I'll be putting the main chip on and shredding the markings 15-Feb-20 02:27 PM so that nobody knows(for a while) what the actual chip is 15-Feb-20 02:31 PM @Spirit it isn't clear how to adjust the current 15-Feb-20 02:31 PM it says in the datasheet 15-Feb-20 02:31 PM From the PDF you uploaded 15-Feb-20 02:31 PM turning the potentiometer 15-Feb-20 02:31 PM plus it's pretty obvious 15-Feb-20 02:31 PM the only adjustable thing on the driver is a trimpot 15-Feb-20 02:32 PM No matches for "potentiometer" 15-Feb-20 02:32 PM You should add that to the feature buller 15-Feb-20 02:32 PM Bullet point 15-Feb-20 02:32 PM Fully adjustable output current, via potentiometer 15-Feb-20 02:32 PM Etc 15-Feb-20 02:32 PM Totally not obvious 15-Feb-20 02:34 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/datasheet-93BB2.pdf 15-Feb-20 02:34 PM try this one 15-Feb-20 02:34 PM but I added "via potentiometer" 15-Feb-20 02:34 PM Thats super tiny text 15-Feb-20 02:34 PM Only one hit for "adjust" 15-Feb-20 02:35 PM fixed the size a bit 15-Feb-20 02:35 PM I was expecting it to be a digital adjust until you mentioned 15-Feb-20 02:35 PM It would be completely obvious in the bullet point 15-Feb-20 02:35 PM For someone scanning anyway 15-Feb-20 02:36 PM yeah, I added it into the bullet points 17-Feb-20 07:18 PM Treated myself to a new soldering station. This thing is awesome. 17-Feb-20 07:18 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/image0-C25F5.jpg 17-Feb-20 09:52 PM Induction heater? 18-Feb-20 01:27 PM https://www.youtube.com/watch?v=oNVUb3n0KR8 18-Feb-20 01:53 PM @piGuy Niiiiiiiice. T210 handle and AM120 micro tweezers? 18-Feb-20 02:04 PM N105 and AM105 tweezers. It's a nano rework station, so pretty tiny tools. 14W heat power for the iron. Amazingly, it's delivering as much or more heat as my 65W Hakko FX-888D 18-Feb-20 02:11 PM ooooooh a nano station 18-Feb-20 02:11 PM Got tons of tips in reserve? 18-Feb-20 02:11 PM I hear they wear out fast. 18-Feb-20 02:11 PM Good to know, I probably should buy some spares 18-Feb-20 02:57 PM Let's see how many of these legitimely ship this week 18-Feb-20 02:57 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/unknown-E13EB.png 18-Feb-20 03:44 PM @piGuy is that an induction heated soldering station? 18-Feb-20 03:47 PM @nmz787 nope just a normal soldering station 18-Feb-20 04:07 PM metcal/thermaltronics is Curiepoint RF heated thing 18-Feb-20 11:16 PM Yeah it looked a bit similar, that's all 19-Feb-20 04:21 AM <__ice9#6039> I had wondered as well 19-Feb-20 04:21 AM <__ice9#6039> Metcal units are wonderful-- definitely one of my best tool purchases 19-Feb-20 04:44 AM JBC is even better. 19-Feb-20 04:44 AM Which is why I'm so sad I don't have one. 19-Feb-20 05:00 AM Signing a work contract tomorrow! Gun do science! (Well … more like building software shims 50h/month, but still) 19-Feb-20 05:01 AM Awesome! 19-Feb-20 05:41 AM <__ice9#6039> Huh JBC ones are directly controllable. That's interesting. Metcal designs generally just specify the temperature via the tip heater core alloy characteristics. 19-Feb-20 07:37 AM Oooooooooh... JCB... I have Metcal cause of the wide blade cartridges. Need those for some of our operations but I am always curious about those new JCB ones. 19-Feb-20 07:40 AM JBC also has an insanely wide selection of tips 19-Feb-20 07:45 AM We need minimum .800 wide blade tips. Do not believe they have that, or at least a few years ago when I looked. Metcal no longer has them in the catalog but still sell them. 19-Feb-20 07:45 AM Oh. Actually they have 21mm now 19-Feb-20 07:45 AM Just saw that. Let’s see what station can use that one 19-Feb-20 07:45 AM Ah I see. They go up to 40Mm for hot bar applications 19-Feb-20 07:45 AM That makes sense 19-Feb-20 07:53 AM And if you buy a couple, they can also do custom, IIRC 19-Feb-20 01:29 PM I was able to ride my bike to work 3 times before it got stolen. Shouldn't have used a cable lock on a $4000 bike.... 19-Feb-20 01:30 PM :( 19-Feb-20 07:43 PM my bike got stolen at the hardware store.. last time I ever lock up my bike 19-Feb-20 07:43 PM and it was a bit more than 4... but.... it was listed on ebay and I used the insurrance money to basically buy it back 19-Feb-20 07:43 PM and now I commute to school on it..... but.. I bring it into our own private lobby/library 19-Feb-20 07:43 PM so it doesnt get locked up at all 19-Feb-20 07:43 PM I used the extra money form insurrance to buy a (German, iirc) power meter crank 21-Feb-20 03:13 AM damn 21-Feb-20 03:13 AM altough a 4000$ bike is not a good ride for work, in my head. 21-Feb-20 03:13 AM I mean, it's just too noticeable that it's an expensive bike 21-Feb-20 03:13 AM when I rode mine, and it was not an expensive bike, I always had it super dirty 21-Feb-20 03:13 AM XD 21-Feb-20 03:15 AM on a related note: https://www.youtube.com/watch?v=5EE8m8mmq1k 21-Feb-20 06:07 AM also, this was an awesome espresso shot 21-Feb-20 06:07 AM I got a new chain and cassette for my bike this past week 22-Feb-20 06:51 PM look at it's tiny toes (oh, and checkout what it's carying) 22-Feb-20 06:51 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/DSC_1033-486D4.jpg 22-Feb-20 08:12 PM Is that a snail on it's back? Can't quite make it out for certain. 22-Feb-20 08:40 PM tadpole 22-Feb-20 08:40 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/DSC_1015-6B297.jpg 22-Feb-20 08:40 PM they deposit their tads (after fertalization and such) into bodies of water, typically in bromeliad flowers 22-Feb-20 08:40 PM I rear t heir young though, and usually grab them as eggs, but I must have missed one.. this fella is now in a water cup to force him to deposit so I can care for it.. their vivarium isnt really setup for them to do it 22-Feb-20 09:40 PM looking nice, how large of a setup do you have for them? 22-Feb-20 09:40 PM always meant to set up a viv with some D. tinctorius "azureus" but fly colonies and I do not get along terribly well 22-Feb-20 10:33 PM these ranitomeya have a small viv right now, but have been doing okay in it (12x12x18) .. my biggest viv is 18x36x24 22-Feb-20 10:33 PM I have 2 diff D. tinctorious auratus, tincs 'patricia', H. azurieventris, R. imitator Veradero (that frog), quinquevittatus, galactonotus, and 2 diff kinds of mantellas 22-Feb-20 10:33 PM I have a wall full of vivs 22-Feb-20 10:33 PM 6 different feeder insects 22-Feb-20 10:36 PM wow that is quite a variety 22-Feb-20 10:36 PM oh, I have some epidobates tricolor/anthonyii as well 22-Feb-20 10:36 PM I used to have a bunch of them 22-Feb-20 10:37 PM all my current cold blooded pets are super low maintenance... red tegus that live outside in a 4'x8' pen and 3 russian tortoises that get to roam the yard freely 22-Feb-20 10:37 PM unfourtenately they are in another room since I moved up here, and I havent been able to enjoy any of them much 22-Feb-20 10:38 PM how much work is maintaining the humidity and stuff? touchy to get set up but then not much work? 22-Feb-20 10:38 PM I have a Mistking setup 22-Feb-20 10:38 PM just fill a resevoir with RO water 22-Feb-20 10:38 PM sometimes siphon out the excess 22-Feb-20 10:38 PM humidity was always my main concern with trying to keep them, Southern California is very dry a lot of the year 22-Feb-20 10:39 PM I know of someone in the dessert that has a backup generator due to the brownouts and such.. and basically cant have the frogs cook 22-Feb-20 10:39 PM so has the genny for the AC for his frogs 22-Feb-20 10:40 PM suppose in the desert and with how much some of the rarer varieties can cost, plus the personal attachment, that would make sense 22-Feb-20 10:40 PM yeah, I lsot a few when I moved up to an attic in San Jose 22-Feb-20 10:40 PM but my populations have been pretty good, here in seattle 22-Feb-20 10:40 PM temperature control is a bit easier 22-Feb-20 10:41 PM yeah would have to watch the temps during the summer here but i think i remember they like things around room temperature 22-Feb-20 10:41 PM 68-75F? 22-Feb-20 10:42 PM yeah, and not just them, but fruitflies go sterile past a certain temperature 22-Feb-20 10:42 PM so your whole cultures could crash if it gets too warm 22-Feb-20 10:42 PM and then you get the fungus outbreaks and all that horrible mess 22-Feb-20 10:42 PM yeah... 22-Feb-20 10:42 PM I'll gladly chat about this later, just finishing up amovie though, 22-Feb-20 10:43 PM maybe if i get a decent clutch out of my tegus this year i will toss some money into a dart frog viv 22-Feb-20 10:43 PM have fun! 22-Feb-20 10:43 PM sounds nice.. frogs are neat 23-Feb-20 10:33 AM pulled t he tad off this morning 23-Feb-20 10:33 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/DSC_1037-60FB6.jpg 23-Feb-20 11:32 AM @LRM @Noxz have you seen this before? https://www.the-odin.com/frog-ge-kit/ 23-Feb-20 11:32 AM I know of The Odin and many of the products they have to offer 23-Feb-20 11:32 AM Zayner does live videos streams and QA stuff a bit 23-Feb-20 11:33 AM Yep 23-Feb-20 11:33 AM https://www.youtube.com/channel/UC-aCKd4djOAf_0BzyUMJ5FA 23-Feb-20 11:33 AM I've gone to a couple of the biohackthe planet conferences 23-Feb-20 11:33 AM oh, he has new videos, nice! 23-Feb-20 11:33 AM yeah, I am interested in a few genetic things, beyond fruitflies 23-Feb-20 11:34 AM And been conversing with him since he was in grad school via the diybio google group 23-Feb-20 11:34 AM more so extraction of certain protein genes and putting them into yeast/ecoli .. to skip some chemistry synthesis 23-Feb-20 11:34 AM Yeah, that's a huge portion of the field 23-Feb-20 11:34 AM Lots of . money potentially 23-Feb-20 11:34 AM no need for crispr there 23-Feb-20 11:35 AM Nah, good old cloning or synbio 23-Feb-20 11:35 AM yup 23-Feb-20 11:35 AM I have wild collected specimens that I want to work with, as well 23-Feb-20 11:35 AM My vacuum work is all leading towards a DNA synthesis machin 23-Feb-20 11:35 AM still need to do some Ladder electrophoresis runs to verify which species 23-Feb-20 11:35 AM yeah, I had to re-read your intro recently and came across that 23-Feb-20 11:37 AM I've got a mini biotech lab here, but haven't had too much time to actually do experiments 23-Feb-20 11:37 AM Been trying to work with someone in Portland to do contract work for that actually 23-Feb-20 11:38 AM I haven't had much time neither 23-Feb-20 11:38 AM I never even setup my fume hood upon moving here 23-Feb-20 11:38 AM which is sadness 23-Feb-20 11:38 AM :( 23-Feb-20 11:38 AM I was doing chemical reactions every night before moving 23-Feb-20 11:38 AM Ah, wow, yeah that's a big change 23-Feb-20 11:39 AM I was waiting till the house was renovated enough, but nope, not going to happen that way 23-Feb-20 11:39 AM I'm thinking about moving now, instead of building more garage here 23-Feb-20 11:39 AM will have a chemistry corner when I move back to Ohio in my watchmaking workshop 23-Feb-20 11:39 AM I've actually been reading a bit into making my own synthetic watch gear oils 23-Feb-20 11:39 AM so, that'll be on the list 23-Feb-20 11:39 AM going for diesters 23-Feb-20 11:40 AM Someone mentioned pthalates around here recently for insulating oil, and I was reading about those a bit this week 23-Feb-20 11:40 AM Oils seem almost infinitely possible 23-Feb-20 11:40 AM yeah, they are common as plasticizers 23-Feb-20 11:40 AM super easy if you get pthalate anhydride, too 23-Feb-20 11:40 AM "reading" a book on micro tribology right now 23-Feb-20 11:40 AM and they have a ton of info on commercial watch oils we use 23-Feb-20 11:40 AM and epilames, etc 23-Feb-20 11:43 AM Epilame sounds like a highschool insult... 23-Feb-20 11:43 AM "He's got a heart of gold, but he's epilame" 23-Feb-20 11:44 AM hah, it's basically a PTFE film on the part to inhibit the oil from spreading elsewhere 23-Feb-20 11:44 AM we dip the escapement in it, then let it run dry for a few minutes to scrap the epilame off the interacting surfaces.. then apply oil and it stays in the wear area and doesnt creep elsewhere 23-Feb-20 11:46 AM Ah, that's basically what I've been designing a vacuum chamber to apply 23-Feb-20 11:46 AM Vapor phase FDTS (anti-stiction) application 23-Feb-20 11:46 AM Used a lot in MEMS stuff 23-Feb-20 11:46 AM It can also be deposited using a hexane bath 23-Feb-20 11:46 AM But is better affixed in vacuum dep 23-Feb-20 11:46 AM And I think more conformal, more monolayer prone 23-Feb-20 11:48 AM the PTFE stuff needs to be dissolved in a flouro-alkane, so hexane with the hydrogens replaced with flourines 23-Feb-20 11:48 AM perfluorohexane 23-Feb-20 11:54 AM Hmm fdts is terminated with chlorosilanes, and the surface needs hydroxyls, so the chlorine combines with hydrogen to evolve HCl... Leaving substrate-O-Si-perfluoro... 23-Feb-20 11:54 AM hrmmm 23-Feb-20 11:54 AM there are a few variants.. epilame started as stearic acid early on 23-Feb-20 11:56 AM I wonder if the word etymology was "make the surface 'lame' to reaction/sticking" 23-Feb-20 05:36 PM Anyone here live rurally? Like on big acreage 30 mins from a grocery store? 24-Feb-20 12:16 AM https://www.youtube.com/watch?v=znuiIAiN8uM 24-Feb-20 12:16 AM not sure this has any practical use at all...but it is interesting 24-Feb-20 04:06 AM Microwave skull-crucible reactors can also work if you use a piece of aluminum wire as a susceptor to start the process 24-Feb-20 12:48 PM So if I want to spin an SM1 threaded waveplate really really fast, any ideas? 24-Feb-20 12:48 PM Precise frequency is not important 24-Feb-20 01:10 PM Budget $500-1000 ish and “fast” meaning many tens of Hz if possible 24-Feb-20 03:54 PM What's your concentricity requirement? 24-Feb-20 03:54 PM And also what's your maximum bore/aperture? Are you using the entire diameter of the waveplate? 24-Feb-20 04:13 PM no concentricity requirement but the beam is ~1.5cm diameter. 24-Feb-20 04:13 PM I meant an SM1 1" waveplate. 24-Feb-20 04:31 PM $2000 gets a Thorlabs DDR25 which can do 5Hz, that seems to be the fastest commercial one 24-Feb-20 05:14 PM Build night. Making my COVID-19 diagnostic device. Wish me luck! 24-Feb-20 05:15 PM go on.. 24-Feb-20 05:16 PM My day job is developing low cost diagnostics for infectious diseases. Quickly retooled my HIV device for COVID-19 testing. 24-Feb-20 05:16 PM Apparently my boss has already pitched it to Gates Ventures, so I guess I better make sure it works! 24-Feb-20 05:20 PM oh that's amazing 24-Feb-20 05:20 PM good luck! :o 24-Feb-20 05:42 PM wow yea good luck with that, that's awesome 24-Feb-20 06:10 PM Good luck, indeed! Got some doctors at UCSF who would like that. 25-Feb-20 12:32 AM Dang, was planning to be in the garage (cold) but ran out of nitrogen so couldn't use my fib... Had some unwrapped chocolates in my hoody pocket thinking nothing of melting since... Cold garage. Well was out of nitrogen so came back into house and got to programming work.. been smelling cocoa butter for a few minutes wondering where it was coming from... Then realized my pocket is a big chocolate mess now :O 25-Feb-20 09:12 AM The person selling that cross I linked also has some pretty cool vintage computer cases: 25-Feb-20 09:12 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/s-l1600-A34BB.png 25-Feb-20 09:14 AM Oh yea those are older IBM industrial PCs, those aren't XT/AT era but later pentium era I believe?? 25-Feb-20 09:14 AM got a link to those @idmb ? I assume they are silly expensive, I believe I have seen that person's listings before 25-Feb-20 09:14 AM Ah nvm I see what you mean the post in swap 25-Feb-20 09:14 AM Ah heh yea one is missing the entire internal chassis 25-Feb-20 11:04 AM But they look cool 25-Feb-20 11:53 AM I love it when I find Mac g5 pro in the trash that has an LLNL/DOE property sticker on it and the hard drives are still in it. 25-Feb-20 11:53 AM Wait no I dont 25-Feb-20 11:53 AM lol 25-Feb-20 12:19 PM I have a coffee table made out of G5s 25-Feb-20 12:19 PM took the 500GB HDDs out and used them as extra backup drives 25-Feb-20 12:35 PM mac pro cases are pretty useful for enclosing large power electronics projects 25-Feb-20 12:53 PM I store my christmas lights in one 25-Feb-20 02:52 PM @Laughing This is when you politely call someone and then someone else in Excess & Surplus gets torn a new one. 25-Feb-20 02:52 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/image0-BD227.gif 25-Feb-20 03:03 PM I need to turn on and off something AC that's only about 10W, anyone know of something cheaper but still enclosed with a nice cable + outlets than the IoT relay? This type: 25-Feb-20 03:03 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/41-n1GFQVTL-5F6CC.png 25-Feb-20 03:03 PM Which is like $45 CAD 25-Feb-20 03:03 PM I need four independent ones so any savings is quadrupled, but don't want to go around making boxes or assembling anything 25-Feb-20 03:05 PM that widget is probably your best 'i don't want to build anything' option 25-Feb-20 03:05 PM i also looked into this for controlling pumps and valves and etc and there's not a lot of cheaper options unless you're willing to entrust control of your things to some IoT company's wack APIs 25-Feb-20 03:08 PM Darn. Would've liked something smaller / simpler for even 10% cheaper 25-Feb-20 03:09 PM there may be a chinesium option to be had on ebay for maybe a little cheaper, but i doubt by much 25-Feb-20 03:09 PM building a well-isolated/safe AC control thing for like a microcontroller is not completely trivial when you have stuff like isolation to worry about 25-Feb-20 03:09 PM just caseless optoisolated relay boards of this caliber with decoupleable grounds already go for, like, $10-ish, with no interfacing electronics (idk if that speaks i2c or what) or AC plugs or fusing or etc etc 25-Feb-20 03:09 PM also, if that outlet box has passed any kind of UL testing, that's probably a big part of the cost too 25-Feb-20 03:09 PM the peace of mind is nice when noodling with line voltage 25-Feb-20 03:09 PM (for whatever that's worth) 25-Feb-20 03:20 PM it doesn't speak at all, it's just a 0-3V logic signal 25-Feb-20 03:29 PM oh interesting, it's an all-or-nothing outlet control, ok 25-Feb-20 03:29 PM hm 25-Feb-20 03:53 PM X10 home automation? 25-Feb-20 03:53 PM https://en.wikipedia.org/wiki/X10_(industry_standard) 25-Feb-20 04:47 PM @idmb https://powerswitchtail.com/ 25-Feb-20 04:49 PM Those were more expensive 25-Feb-20 04:49 PM The price on the one you found is sad, I see that for $21 shipped on Amazon 25-Feb-20 04:49 PM Idk what price it might show you... https://www.amazon.com/Iot-Relay-Enclosed-High-Power-Raspberry/dp/B00WV7GMA2 25-Feb-20 05:31 PM Am 25-Feb-20 05:31 PM The US listing doesn’t ship here 25-Feb-20 05:45 PM there are standard 24V relays for things like fans etc 25-Feb-20 05:45 PM https://www.amazon.com/gp/product/B003B3A8Z0 25-Feb-20 06:50 PM See with buying stuff 25-Feb-20 06:50 PM I get to pretend I get paid 100x what I do 25-Feb-20 06:50 PM But I’m also supposed to save money 25-Feb-20 06:50 PM So anything that saves work = great 25-Feb-20 11:45 PM Anyone here know about pouring concrete floors, and what you should engineer for in terms of electron microscope sort of applications? 25-Feb-20 11:45 PM I know @AdamMcCombs would probably have some comments 25-Feb-20 11:54 PM Ground floors generally preferred and seismic study recommended just to find where you building shimmies the most. 25-Feb-20 11:54 PM Because hoo nelly does an elevator and pump room set everything dancing, even in the sub-sub-sub-basement. 26-Feb-20 12:11 AM Heh yeah I've heard stories about elevators and distortion 26-Feb-20 12:11 AM Luckily this place is almost 80 acres, and the plots all around are at least as largee 26-Feb-20 12:11 AM So if anyone is gonna be causing distortion it should be me or a seismic activity from plate tectonics 26-Feb-20 12:11 AM Oh wow, YouTube video says after pouring their barn's floor they let it cure for 4 weeks 26-Feb-20 02:43 AM https://www.nist.gov/news-events/news/2020/02/simple-retrofit-transforms-ordinary-electron-microscopes-high-speed-atom 26-Feb-20 02:43 AM I'm not in the topic, but this sounds interesting 26-Feb-20 05:19 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20200226_141743-8ECA3.jpg 26-Feb-20 05:19 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20200226_141803-D2A6D.jpg 26-Feb-20 05:19 AM hell yeah, alumina! 26-Feb-20 06:34 AM I acquired a SEM from a building where it appears they poured an independent foundation for it. 26-Feb-20 07:01 AM Lots of new labs get floating floors for it 26-Feb-20 10:42 AM HOLY the solidworks "my solidworks" site is the biggest piece of garbage I have ever seen 26-Feb-20 10:44 AM Floating floor just means that there's a gap between the floor and the building? 26-Feb-20 10:44 AM Seems like a risk for, water or something, to run into and get trapped 26-Feb-20 10:44 AM I guess maybe that gap could be sealed with silicone RTV 26-Feb-20 11:04 AM haha no 26-Feb-20 11:04 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/NanoG2-omegapod-26E69.png 26-Feb-20 11:04 AM pneumatically floated multi-ton blocks of concrete 26-Feb-20 11:04 AM SEM is much more forgiving, I guess I should have been more clear that it's more STM that gets this kind of treatment 26-Feb-20 02:19 PM @funranium how does one get ethics approval to do this? 26-Feb-20 02:19 PM "The effects of superimposed tilt and lower body negative pressure on anterior and posterior cerebral circulations" 26-Feb-20 02:19 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/phy212957-fig-0001-m-5DA1B.png 26-Feb-20 02:20 PM Wow 26-Feb-20 02:53 PM Nice 26-Feb-20 02:53 PM The prof doing it on themselves? 26-Feb-20 02:55 PM n=13 26-Feb-20 02:57 PM The answer is “a very convincing application to the IRB”. 26-Feb-20 03:19 PM that is a sinister contraption 26-Feb-20 03:19 PM my head hurts just looking at it 26-Feb-20 03:35 PM https://physoc.onlinelibrary.wiley.com/doi/full/10.14814/phy2.12957?fbclid=IwAR3JpaZZrmYQtWLeJ3L11X7C8yiD4L5IYoqtOGOIcTz4S_FzjJQyAscDEQA 26-Feb-20 03:35 PM like what 26-Feb-20 03:35 PM I guess this belongs in #general because it's about vacuum.... 26-Feb-20 03:48 PM this is like a big field 26-Feb-20 03:48 PM https://www.facetsjournal.com/doi/pdf/10.1139/facets-2016-0012 26-Feb-20 03:48 PM amazing 26-Feb-20 03:48 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/unknown-CAAE6.png 26-Feb-20 03:50 PM 'We just really wanted to flip some undergrads upside down for a while' 26-Feb-20 03:51 PM That 26-Feb-20 03:51 PM But I have hard time believing that it's not the fetish of one of the principal authors. 26-Feb-20 03:52 PM i wasn't gonna say it, 26-Feb-20 03:52 PM Heh 26-Feb-20 04:14 PM Heeheehee. I have totally marked up proposals “Not my kink, but sure.” 26-Feb-20 04:17 PM Interesting discussion from a former Fusion startup founder in this one https://news.ycombinator.com/item?id=22425745 26-Feb-20 04:17 PM It contains among others this sad sentence "I tried building the long-shot design. Then a piece of plastic got into the main turbopump and it ate itself. The 2000 market crash happened. Everything fell apart." 26-Feb-20 04:18 PM ouch 26-Feb-20 04:38 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/DSC_3000-DDD0C.JPG 26-Feb-20 04:38 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/DSC_2999-D8FA1.JPG 26-Feb-20 04:38 PM Mmmm leds 26-Feb-20 07:44 PM grumble time to assign 48 FPGA pins by hand.... 26-Feb-20 08:49 PM I didn't make any typos, and everything works! I have successfully built the world's lousiest microprocessor directly from logic gates and flip-flops. 26-Feb-20 08:49 PM Think 6502 if it were only 4 bits, had 16 bytes of RAM, and 7 instructions. Now I just have to finish the lab report and take my final exam.... 26-Feb-20 08:58 PM Have you seen the worlds worst video card ? 26-Feb-20 09:48 PM I know you can use an FPGA and resistors to output VGA. 26-Feb-20 09:52 PM https://m.youtube.com/watch?v=l7rce6IQDWs 27-Feb-20 01:44 AM https://www.youtube.com/watch?v=MKyKs3TFluw 27-Feb-20 01:44 AM German TV casually explaining dark matter and detectors to children 27-Feb-20 01:44 AM goddamn I love this show 27-Feb-20 01:44 AM I wish I could live in the Alps 27-Feb-20 09:04 AM I love that “video card”!!! 27-Feb-20 11:10 AM @rdpierce years ago I wrote a pin assigner tool using a SAT solver... Similar in utility as Cadence's FPGA System Planner... But more customized to a non-FPGA pin assignment application (high volume automated test equipment). 27-Feb-20 11:48 AM in the navy 27-Feb-20 12:35 PM The song? 28-Feb-20 01:11 AM yes 28-Feb-20 01:11 AM https://youtu.be/nmGuy0jievs 28-Feb-20 12:31 PM every other research group looks so fun 28-Feb-20 12:31 PM like look at this sense of humour 28-Feb-20 12:31 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/unknown-30554.png 28-Feb-20 12:31 PM a web page for the pets of the group 28-Feb-20 12:31 PM amazing 28-Feb-20 01:39 PM SPECTROSCOPETS YAY 28-Feb-20 02:20 PM https://www.nytimes.com/2020/02/28/science/freeman-dyson-dead.html 28-Feb-20 02:20 PM That is too bad... but not surprising given his age 28-Feb-20 03:20 PM I decapped Q2!... unintentially ... it was shorted anyways 28-Feb-20 03:20 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/DSC_1053-1E11D.jpg 28-Feb-20 04:23 PM So, I have something to contribute to this particular discussion, however, there is a curse-word in the URL (and name of product), and so the orwellian censors on here just make it vanish... 28-Feb-20 05:23 PM fixed the problems on the 'spare' board (someone put 10K resistors in, instead of 10 ohm!) and it worked well, shipping them back to fellow projector 28-Feb-20 05:23 PM btw, that is a peak-hold board, for direct injection (diesel and GDI) 28-Feb-20 05:23 PM based mostly off the eval board, but a few spins ourselves 28-Feb-20 05:23 PM high pressure is kinda like vacuum when you are outside the high pressure vessel, right? 28-Feb-20 05:59 PM Does discord allow on the fly created rooms? 28-Feb-20 05:59 PM We could create one and all join it to share unsafe stuff there... 28-Feb-20 06:07 PM only admins 28-Feb-20 06:08 PM Well i mean outside this channel or whatever the term is 28-Feb-20 06:08 PM Obviously this place is totally separate from styropyros, etc 28-Feb-20 06:08 PM Does discord chat cost money? 28-Feb-20 06:09 PM server I think is the term? 28-Feb-20 06:09 PM no, they have pay versions, that allow you more things 28-Feb-20 06:09 PM emojis, etc etc 28-Feb-20 06:09 PM Pfft 28-Feb-20 06:09 PM Who needs that 28-Feb-20 06:09 PM the other server I am an admin of (but dont know how to do anything) has like 2k users 28-Feb-20 06:10 PM I mean unless there are vacuum emojis 28-Feb-20 06:10 PM so, no user limit on free 28-Feb-20 06:10 PM at a point you can get animated chat icons 28-Feb-20 06:10 PM chat/server 28-Feb-20 06:10 PM same thing 28-Feb-20 06:10 PM but yeah, kinda useless 28-Feb-20 07:09 PM if anyone has any proposals for cool emojis at any time i am more than happy to add them btw 28-Feb-20 07:09 PM and by proposals i mean 'i am lazy, send me small images' 28-Feb-20 08:53 PM I want a turbo salad one 29-Feb-20 01:31 AM Speaking of simulation -- Geant 4. It's like RollerCoaster Tycoon for radiation, except with no graphics. @PeterZieba What about the dinopark tycoon version? 29-Feb-20 01:59 AM @qualia All of the warning signs 29-Feb-20 01:59 AM Also: I don't know what it is about StyroPyro, but whenever I see him in videos, he looks like he's some alien wearing someone's skin, pretending to be a human. Really bizarre thought, apologies to him, but am I alone in that? 29-Feb-20 04:37 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/image0-317DA.jpg 29-Feb-20 04:37 AM is it a problem being an alien in here? 29-Feb-20 06:26 AM I made a thing 29-Feb-20 06:34 AM thing 29-Feb-20 06:34 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/ferd-45ED8.jpg 29-Feb-20 07:16 AM <𝓕ermion#6024> Are there other engineering/experimentalist servers? 29-Feb-20 07:16 AM <𝓕ermion#6024> There’s the electrical engineering/physics/chemistry servers and they’re cool 29-Feb-20 07:16 AM <𝓕ermion#6024> But I have to say this server is much closer to what I’m looking for than those. 29-Feb-20 07:18 AM we are also doing electrical engineering 29-Feb-20 07:18 AM and physics 29-Feb-20 07:18 AM <𝓕ermion#6024> Yeah! 29-Feb-20 07:18 AM <𝓕ermion#6024> This server has a very 4hv feel. 29-Feb-20 07:19 AM not fancy pancy enough? :(( 29-Feb-20 07:19 AM <𝓕ermion#6024> Nooo no I’m just greedy and want more servers. 29-Feb-20 07:20 AM ok 29-Feb-20 07:20 AM <𝓕ermion#6024> This server rocks. 29-Feb-20 07:20 AM \o/ 29-Feb-20 07:20 AM now I want also more servers 29-Feb-20 07:20 AM <𝓕ermion#6024> Was immediately happy to see a role for people who had mass eBay purchased a model of gauge. 29-Feb-20 07:22 AM Is that mass eBay purchase still open? 29-Feb-20 07:22 AM Not sure if my gauge is repairable. 29-Feb-20 07:22 AM I need a turbo to test any repairs and the turbo @PeterZieba and I thought we could use is broken. 29-Feb-20 07:22 AM We're trying to figure out how to remedy this.... 29-Feb-20 07:27 AM more turbos 29-Feb-20 07:28 AM <𝓕ermion#6024> Are turbos reasonable for hobbyists to buy on eBay? 29-Feb-20 07:28 AM <𝓕ermion#6024> Maybe the older belt driven ones lol 29-Feb-20 07:29 AM yeah? 29-Feb-20 08:18 AM Yeah haha 29-Feb-20 08:18 AM Lots of people here have been buying turbopumps on eBay 29-Feb-20 08:18 AM For <$1000 for $10,000-30,000 pumps 29-Feb-20 09:01 AM yeah 29-Feb-20 09:02 AM just make sure you know that you could be buying a paperweight if the seller does not guarantee it 29-Feb-20 09:02 AM eBay turbos are awesome if you are willing to take that risk, though 29-Feb-20 09:02 AM i knew mine was going to need a bearing replacement and that was no big deal...replacing the hall sensors was more of an adventure 29-Feb-20 09:02 AM for a nearly free turbo it was worth it 29-Feb-20 09:13 AM damn, the coronavirus quarantine seems to have been extended and more chinese eBayers seem to have shut down 29-Feb-20 09:13 AM now they are all away till March 11, 2020 instead of March 1st 29-Feb-20 09:13 AM maybe i will just try 2400V through a BNC connector if this continues 29-Feb-20 09:20 AM %) 29-Feb-20 09:20 AM could work 29-Feb-20 09:23 AM alternatively...anyone know a not from China source of MHV connectors for around $3/ea max? 29-Feb-20 09:23 AM did not expect eBay sellers to actually shut down this long 29-Feb-20 09:36 AM @Laughing You are not alone. 29-Feb-20 09:56 AM 3 is pretty cheap 29-Feb-20 10:16 AM Why not SHV? 29-Feb-20 10:22 AM not planning to go over 2500V ever with them and would like to be able to force a BNC connector on in a pinch...i think that leaves me with MHV as the main option 29-Feb-20 10:22 AM of course the BNC forced onto MHV does not quite latch but it will work 29-Feb-20 10:48 AM Why not just use bnc then lol 29-Feb-20 11:20 AM Worried that 2400V will cause arcing over. It is just going on a Ludlum model 12 because all the geiger tubes and my NaI(Tl) all have BNC but the He3 neutron tubes I want to set it up with also need 1600V and 2400V. 29-Feb-20 11:20 AM Might just use BNC and set up an entirely separate detector for the 2400V 29-Feb-20 11:22 AM I'm having no issues at all at 2.5 kV with my ludlum and BNC 29-Feb-20 11:22 AM just make sure to clean everything properly 29-Feb-20 11:22 AM the coax cable matters more than the connector 29-Feb-20 11:22 AM ^ this 29-Feb-20 11:22 AM RG62 everything! 29-Feb-20 11:23 AM a nice clean bnc connector can easily take 2.5kV but you can also use coax that can barely take 100V so... just be careful 29-Feb-20 11:23 AM I have a giant spool of rg213 for my HV stuff tho 29-Feb-20 11:24 AM My plan is to see what types of coax my uncle has... he runs an audio cable business so he probably has a spool of a couple kinds 29-Feb-20 11:24 AM hard to beat free 29-Feb-20 11:25 AM OFHP Copper, monicristalline, alligned with the moon phase for better sound? 29-Feb-20 11:26 AM Please don't remind me of those people...hurts my soul every time I make parts for stuff he sells but hey if it makes people happy to spend ridiculous amounts on cables who am I to say no 29-Feb-20 11:26 AM most of the stuff he sells is actually not in that realm of the industry but he makes the most profit off those people 29-Feb-20 11:27 AM fair enough 29-Feb-20 11:27 AM but I have to say, most audio stuff I've seen so far is actually pretty cheap stuff, as it as to carry <50V and even less current 29-Feb-20 11:28 AM he has one of his main models that sells for like $800 29-Feb-20 11:28 AM for a 6ft interconnect 29-Feb-20 11:41 AM @𝓕ermion got links to any interesting electrical engineering discords? 29-Feb-20 02:28 PM Don’t the Ludlums have proprietary C connectors anyway? 29-Feb-20 02:37 PM How do their C connectors differ from the normal standard C-connectors? 29-Feb-20 02:37 PM they don't 29-Feb-20 02:37 PM but most people have only seen them on ludlums, that's why they think they're proprietary ^^ 29-Feb-20 02:40 PM Ah 29-Feb-20 02:40 PM Tbh I gave away a plastic grocery bag of NIB C-connectors few years back as I never found a use for them. 29-Feb-20 02:41 PM they're not the best connectors IMO 29-Feb-20 02:41 PM Only seen them used in military electronics before learning that ludlum used them 29-Feb-20 02:41 PM Just chonky BNC 29-Feb-20 02:41 PM can be replaced with BNC or SHV without any loss of usability 29-Feb-20 02:42 PM I think one Nokia SV1000 I had was using C and friend hasda swedish military surplus UHF yagi with C 29-Feb-20 02:42 PM And that's about it :D 29-Feb-20 02:43 PM At least they can’t be confused with anything else unlike BNC and MHV 29-Feb-20 02:45 PM MHV should never have existed 29-Feb-20 02:45 PM whoever sent the order for the first batch to be manufactured 29-Feb-20 02:45 PM is right next to the keurig coffee pods guy 29-Feb-20 02:45 PM in my list of things that shouldn't exist 29-Feb-20 02:46 PM And Thomas Midgley 29-Feb-20 02:46 PM lead in gas guy? 29-Feb-20 02:46 PM Lead gas and CFCs 29-Feb-20 02:47 PM Is MHV the thing folks call "HV-BNC" or what? 29-Feb-20 02:47 PM oh, multikill! 29-Feb-20 02:47 PM @rfs yep 29-Feb-20 02:47 PM Damn guy had a personal grudge against the planet 29-Feb-20 02:47 PM holy heck 29-Feb-20 02:47 PM he became partially paralyzed 29-Feb-20 02:47 PM and then made a device to help him move around 29-Feb-20 02:47 PM and then that device got tangled and strangled him 29-Feb-20 02:48 PM what the hell 29-Feb-20 02:48 PM @GigaSquirrel Aww hell, I think I have some in my junkbox :D 29-Feb-20 02:48 PM or just BNC's made for HV applications 29-Feb-20 02:48 PM that sounds like some cyber / steampunk thriller 29-Feb-20 02:49 PM Also encountered one UHF tube amplifier with a BNC (it looked like normal BNC to me) as the HV DC supply wire 29-Feb-20 02:49 PM but IIRC it ran only 1000-1500V plate. 29-Feb-20 02:49 PM there is also some russian BNC version 29-Feb-20 02:49 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/Hunley-1-DA3ED.png 29-Feb-20 02:49 PM Hehe 29-Feb-20 02:49 PM There's also a russian Type-N 29-Feb-20 02:50 PM from the list of inventors who died from their own inventions 29-Feb-20 02:50 PM and I have some 29-Feb-20 02:50 PM https://en.wikipedia.org/wiki/SR_connector 29-Feb-20 02:50 PM The soviet 75ohm high power connectors are also funky 29-Feb-20 02:50 PM Based on the American BNC connector, the SR connector differs slightly in dimensions due to discrepancies in imperial to metric conversion, though with some force they can still be mated. 29-Feb-20 02:51 PM " Each end was equipped with ballast tanks that could be flooded by valves or pumped dry by hand pumps." 29-Feb-20 02:51 PM @GigaSquirrel What, not heard of the Soviet Inch? 29-Feb-20 02:51 PM It's 25mm long. 29-Feb-20 02:52 PM if you want to get mad 29-Feb-20 02:52 PM For example you can plug in PDP-11 cards in to soviet made PDP-11 clones 29-Feb-20 02:52 PM look up how different companies define "point" for fonts 29-Feb-20 02:52 PM You just have to plug them in with a mallet. 29-Feb-20 02:52 PM nice XD 29-Feb-20 02:52 PM Due to 25.4mm vs. 25mm 29-Feb-20 02:52 PM Soviet DIP IC's also have 2.5mm raster, not 2.54mm 29-Feb-20 02:52 PM Which is annoying 29-Feb-20 02:54 PM that sounds very 29-Feb-20 02:54 PM well 29-Feb-20 02:54 PM russian 29-Feb-20 03:05 PM Same deal with KF flanges. It's not as extreme and you shouldn't have problems mating an American KF flange with a European one, but they aren't exactly the same size. 29-Feb-20 03:26 PM huh? 29-Feb-20 03:26 PM the flanges are the same but the tube sizes are different, afaik 29-Feb-20 03:26 PM not that it matters of course due to the genius idea of a centering ring 29-Feb-20 03:27 PM That's what I meant 29-Feb-20 03:34 PM can anyone think of anything to do with a chamber like this? 29-Feb-20 03:34 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/unknown-58945.png 29-Feb-20 03:34 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/unknown-07ED3.png 29-Feb-20 03:34 PM double-sided 10" CF 29-Feb-20 03:34 PM it has been bothering me in a drawer for a few years now 29-Feb-20 04:15 PM I hate to say it, but I use leaded gasoline. 29-Feb-20 04:15 PM It's kind of necessary for piston aircraft engines. 29-Feb-20 04:15 PM And... yeah... @GigaSquirrel is right, I've only seen C connectors on Ludlums.... 01-Mar-20 02:47 AM while ebay hunting for the fiddly bits needed to convert APC-7 to literally anything else for my tunnel diode pulser, i was reminded that the only potential other use of C connectors is that they're good up to 11 GHz, where BNC is ostensibly a 4 GHz max sort of affair 01-Mar-20 02:47 AM mind, i've never seen them used this way, but the possibility exists nonetheless 01-Mar-20 04:45 AM woek up before 5am on this sunday for an ebay auction, I have been the highest bidder (no bids against me) since 6 days ago, but yeah, just wanna see this thing end 01-Mar-20 04:51 AM no snipers, what?!? 01-Mar-20 04:51 AM wow 01-Mar-20 04:51 AM nice 01-Mar-20 04:51 AM it also was a weird search thing, like you cant see the other items the guy is selling and whatnot 01-Mar-20 04:52 AM now you own another awesome thingy? 01-Mar-20 04:52 AM a tiny watchmakers drill press 01-Mar-20 04:52 AM a Boley BE2 01-Mar-20 04:52 AM ahh 01-Mar-20 04:52 AM cool 01-Mar-20 04:52 AM needs restoration though 01-Mar-20 04:52 AM repaint and whatnot 01-Mar-20 04:52 AM fantastic... now back to bed 01-Mar-20 07:25 AM <𝓕ermion#6024> Oh that’s a gorgeous drill press. 01-Mar-20 07:25 AM <𝓕ermion#6024> Anything boley is great. 01-Mar-20 08:03 AM The best defense is a good offense. 01-Mar-20 08:03 AM esnipe.com is very reasonable in fees. 01-Mar-20 08:03 AM Just put in your best price and forget about it. No need to stay up. Wake up the next morning and find out if you won. 01-Mar-20 08:46 AM oh, I dont snipe 01-Mar-20 08:46 AM I just like to pay instantly 01-Mar-20 08:46 AM like I said, I had my max bid in 6 days ago 02-Mar-20 06:27 PM Why pay to snipe? Just slap down your max in the last couple seconds and let the system hide your max like it's supposed to. 02-Mar-20 06:35 PM i recently missed out on work to try and snipe an auction i ended up losing, just 'cos scheduling 02-Mar-20 06:35 PM babysitting auctions is annoying, so i can kinda understand the utility of a service for it 02-Mar-20 06:35 PM also doing that spikes my adrenaline SO BAD and i am not sure of why i have such an incredible physiological response to this weird little gambling thing but i honestly don't like it at all 02-Mar-20 06:35 PM .. should probably look into a sniping service for that reason alone 02-Mar-20 06:47 PM aren't there free sites that offer sniping services? has been years since i used one though... 02-Mar-20 06:47 PM i just bid from my phone if i cannot be home for an auction's end and have not had any issues with missing things 02-Mar-20 06:47 PM totally agree about the adrenaline spike though, such a stupid thing for that to happen with 02-Mar-20 06:47 PM hate it every time 02-Mar-20 07:10 PM hah, yeah.. that feeling is somethin, huh 02-Mar-20 07:10 PM I dont hate it, it's sometimes fun 02-Mar-20 07:10 PM sometimes it is stressfull 02-Mar-20 07:12 PM WELP, veterinarians at Cal have had to call UCPD to secure their medical supplies, specifically facemasks, due to theft. Because they need those for surgery. NOTE: the vets at Cal work in a rather secure underground facility. Which means students/staff are stealing them. 02-Mar-20 07:15 PM wow stealing from the veterinarians is a bit extreme of a measure to go for face masks that probably are surgical masks and not even going to offer any protection at all... 02-Mar-20 07:16 PM Illogical panic is illogical. 02-Mar-20 07:17 PM only thing i am worried about with the coronavirus is getting my already infirm grandfather sick...other people seem to be losing their minds heh 02-Mar-20 07:17 PM doesn't help that one of the early cases was right nearby me in Irvine 02-Mar-20 07:18 PM It's particularly annoying that, in this case, these are also people that should know better. 02-Mar-20 07:18 PM wonder if the hospital my dad works at have had any similar incidents, will have to ask him 03-Mar-20 08:59 PM <上海#1372> @𝓕ermion 03-Mar-20 08:59 PM <上海#1372> i don't see anything about zero point energy in here 03-Mar-20 08:59 PM @funranium True or False: Chairs and ladders are the same thing. 03-Mar-20 09:40 PM TRICK QUESTION: unless you're in DOE, only one requires safety training. 03-Mar-20 09:41 PM I bet the one that doesn’t require safety training is more likely to cause long term health problems 03-Mar-20 09:44 PM Correct. 03-Mar-20 09:56 PM Wait, I thought office safety training was pretty standard. 03-Mar-20 09:56 PM I know DOW has videos about it at least 03-Mar-20 09:56 PM Well, they call it "office ergonomics" 03-Mar-20 09:59 PM Also, that brought us perilously close to a sandwich vs. taco discussion. 04-Mar-20 12:12 AM Ladder or chair? 04-Mar-20 12:12 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/hauck-hochstuhl-alpha-plus-natur-661079-5-134B9.jpg 04-Mar-20 12:19 AM chadder 04-Mar-20 12:19 AM lair? 04-Mar-20 12:28 AM Hochstuhl alpha plus (90kg max) 04-Mar-20 12:30 AM inklusive Schrittgutt + zusätzlichem 5-Punkt Gurt! 04-Mar-20 12:32 AM I've seen an adult try to use one as a ladder (and breaking it in the process) so safety training is probably a good idea either way 04-Mar-20 12:35 AM Though I wouldn't say the person weighed more than 90kg 04-Mar-20 12:35 AM Uh oh! The manufacturer says it's a Treppenhochstuhl 04-Mar-20 01:54 AM I had one of those 04-Mar-20 01:54 AM It's definitively both 04-Mar-20 01:54 AM Until you get too heavy for it, then it's firewood 04-Mar-20 04:38 AM Ha! I remember those. And I have used one as a ladder when I was a kid. 04-Mar-20 07:55 AM Tangentially related.... 04-Mar-20 07:55 AM I am in talks with a war gaming group. They go to gaming conventions and run very realistic crisis simulations. 04-Mar-20 07:55 AM The people involved are often State Department / Pentagon affiliated. 04-Mar-20 07:55 AM What separates this from other RPGs is that they have a lot of expertise, and rather than following mechanical rules that lead to unrealistic outcomes, they try to make the games play out as they probably would if something really happened. 04-Mar-20 07:55 AM They’re doing a modern crisis game after talks on Chernobyl. 04-Mar-20 07:55 AM So there’s talk of doing a crisis involving a nuclear reactor meltdown. 04-Mar-20 07:55 AM The trouble is that even a Chernobyl scale meltdown is only going to seriously cripple one country and maybe close neighbors. 04-Mar-20 07:55 AM It’s not going to provoke an interesting global crisis. 04-Mar-20 08:03 AM if only you knew someone with some detectors to check for contamination 04-Mar-20 08:05 AM So I’m wondering if anyone can think of scenarios that would be interesting for gameplay. But the catch is that they have to be realistic. 04-Mar-20 08:05 AM Something that occurred to me: cyberterrorism. Virus in the SCADA systems of a common reactor manufacturer causing large numbers of global meltdowns. 04-Mar-20 08:05 AM How realistic is this? 04-Mar-20 08:05 AM On one hand, I’m thinking about Stuxnet. 04-Mar-20 08:05 AM A SCADA system can tell the operators that everything is fine while simultaneously changing the controls to destroy a system. 04-Mar-20 08:09 AM even a Chernobyl scale meltdown is only going to seriously cripple one country and maybe close neighbors. Well ... They nearly missed a complete wipeout and global nuclear fallout 04-Mar-20 08:09 AM If they had not detected the water below the reactor, the steam explosion would have torn the whole reactor to shreds 04-Mar-20 08:09 AM 2000-4000* molten Uranium, graphite and water don't mix very well 04-Mar-20 08:11 AM But few reactors are as inherently unsafe as RBMKs, and I wonder if a control system doing the worst possible things could blow up a reactor before someone could stop it. 04-Mar-20 08:11 AM Yes, for sure 04-Mar-20 08:12 AM Re: Chernobyl, yeah there was the concern of a steam explosion if the bubbler pool wasn’t drained. Let’s say that happened. 04-Mar-20 08:12 AM IIRC there are some RMBK1k still online 04-Mar-20 08:12 AM Sosnovy Bor for example 04-Mar-20 08:12 AM There are. 04-Mar-20 08:12 AM More fallout would go airborne. But I’m guessing it would be more concentrated in the same geographic region. 04-Mar-20 08:13 AM With global warming? Naah 04-Mar-20 08:13 AM Pair the SCADA virus with all of the RMBK reactors all over the former soviet union, there you go, global fallout, uninhabitable european continent and heavy contamination on the other continents 04-Mar-20 08:13 AM As for realism, you’ll need to have a stage of your game that involves infiltration. 04-Mar-20 08:13 AM Woop! the last RBMK in Sosnovy Bor is scheduled to shut down in 2025 04-Mar-20 08:14 AM Still got some time left 04-Mar-20 08:14 AM About 20 years 04-Mar-20 08:14 AM There ain't any scada that could get viruses in original or even upgraded spec RBMK tho 04-Mar-20 08:14 AM They upgraded, I'm pretty sure I hope 04-Mar-20 08:15 AM Hope that they are vulnerable to hacking? 04-Mar-20 08:15 AM They did do some fixes after Chernobyl 04-Mar-20 08:15 AM Every system is vulnerable once it is connected 04-Mar-20 08:15 AM Here the hacking just needs to be done with an axe 04-Mar-20 08:15 AM RBMK was designed in the Soviet union during the seventies. 04-Mar-20 08:16 AM Where are you based? Osjorsk? 04-Mar-20 08:16 AM And to be cheap and fast to build at that. There's not gona be stuff there you hack remotely. 04-Mar-20 08:16 AM Nah, Finland. 04-Mar-20 08:17 AM Not soviet enough 04-Mar-20 08:17 AM Sosnovy Bor is relatively close to the border and runs RBMK's. It's in the news from time to time. 04-Mar-20 08:17 AM Videos from the nineties/early 2000 are pretty bad 04-Mar-20 08:18 AM Though, it doesn't get more real than Coronavirus 04-Mar-20 08:18 AM Did not follow the RMBK's ... When they go up, they go up 04-Mar-20 08:18 AM @rdpierce So, you need a global catastrophe, preferrably with some nuclear fallout? 04-Mar-20 08:18 AM .. or something detectable marking danger 04-Mar-20 08:21 AM WHy does it need to be global? 04-Mar-20 08:24 AM Global because multiple groups are playing and it needs to be interesting for everyone. 04-Mar-20 08:24 AM Chernobyl arguably was a signicant factor in the fall of the Soviet Union, but did it affect the US? Not really. 04-Mar-20 08:24 AM I imagine another game will involve a global pandemic.... 04-Mar-20 08:24 AM @einball yes, looking for reactor related fallout. Not nuclear weapons, that was a scenario last year. 04-Mar-20 08:24 AM Iran (a NPC) got the bomb, and fanatics launched two small nukes at Tel Aviv. Israel (also a NPC) predictably retaliated with 30 nukes, obliterating Iran. 04-Mar-20 08:24 AM And the fallout landed in India and Pakistan. 04-Mar-20 08:30 AM meh 04-Mar-20 08:31 AM Iran retaliated by releasing weaponized measles, which caused a global pandemic. 04-Mar-20 08:31 AM The only truly global nuclear thing would be nuclear war and that's likely boring to wargame. 04-Mar-20 08:31 AM Do something different? An Alternate Reality game? 04-Mar-20 08:31 AM That's why I'm wondering about SCADA and multiple nuclear meltdowns triggered globally. 04-Mar-20 08:34 AM What about North Korea? Kim is always a fun factor. 04-Mar-20 08:34 AM They do run games featuring sci-fi futuristic tech, but the modern crisis games tend towards realism. 04-Mar-20 08:34 AM North Korea attacks the US and China 04-Mar-20 08:34 AM Kim could be the source of the meltdowns. NK invests in cyberwarfare. 04-Mar-20 08:34 AM Those are the largest factors in global economy 04-Mar-20 08:34 AM Economy collapses, people get sick and die 04-Mar-20 02:24 PM https://twitter.com/BadDogDesigns_/status/1235256957315014656 04-Mar-20 02:24 PM Why can't I @ Spirit? 04-Mar-20 02:24 PM As that would likely be of interest to him. 04-Mar-20 02:24 PM No longer on this server 04-Mar-20 06:28 PM Huh, i wonder if his account got kicked again 04-Mar-20 07:07 PM Nah you can message him directly still 04-Mar-20 08:39 PM Really? Interesting. 04-Mar-20 09:03 PM I just put a post on that. I will try to send him a message. 04-Mar-20 09:03 PM Nah. Can’t send a direct message so I just tweeted at him. I recognize him from Hack A Day stuff which technically I am still a contributor for but I have not done anything for them In a long time cause I am just too busy. 04-Mar-20 10:00 PM What's his Twitter? I'd like to follow him 04-Mar-20 10:57 PM Uh what a shame... Lovely Nixies 04-Mar-20 11:13 PM @devoopes You mentioned you're getting into glassblowing. While the money right now is definitely in esoteric bongs, what have you been working one? 05-Mar-20 04:26 AM I just got my 2020 Coronavirus Pandemic eQSL card from IRRS Italy for their shortwave broadcast yesterday @ChrisSmol https://cdn.discordapp.com/attachments/499221835225890829/685096079083175976/DOyDwdR.png 05-Mar-20 04:26 AM Italians sure have a sense of humor. 05-Mar-20 04:47 AM No, ham Radio guys, not Italians 05-Mar-20 05:20 AM That's a shortwave broadcast station. :) 05-Mar-20 06:25 AM Damn 05-Mar-20 06:25 AM Those still exist? 05-Mar-20 06:30 AM Some do 05-Mar-20 06:55 AM Not for long I suppose 05-Mar-20 06:59 AM no only for short, hence the name 05-Mar-20 07:00 AM <𝓕ermion#6024> I have my extra license 05-Mar-20 07:00 AM <𝓕ermion#6024> But I basically only got it for kicks 05-Mar-20 07:00 AM <𝓕ermion#6024> And to do ham radio things with my dad. 05-Mar-20 07:00 AM <𝓕ermion#6024> And to make a bike finder for burning man. 05-Mar-20 07:07 AM Seems legt 05-Mar-20 07:07 AM Legit 05-Mar-20 07:07 AM I would love to go to burning man once 05-Mar-20 08:47 AM Advanced here. That says something about how long ago I got it. Back when the CW requirement was the main impediment. 05-Mar-20 08:51 AM I was glad I could skip that 05-Mar-20 08:51 AM However, it's on the todo-list 05-Mar-20 11:48 AM <𝓕ermion#6024> @Mezmorizor Do you do a bunch of high speed averaging in the stuff you do? 05-Mar-20 11:48 AM <𝓕ermion#6024> I can't find anything that'll let me do real-time averaging 05-Mar-20 11:48 AM <𝓕ermion#6024> like capture for 10 microseconds, have maybe 200 ns deadtime, capture for 10 microseconds 05-Mar-20 11:48 AM <𝓕ermion#6024> and average all these records together 05-Mar-20 12:10 PM No, sorry. Our continuous wave is mass spec limited which only gets to like 10 KHz/the data is post processed anyway, and the pulsed experiment reaches a whopping 10 Hz 05-Mar-20 12:10 PM And the pulsed experiment isnt even done yet 05-Mar-20 12:13 PM <𝓕ermion#6024> ah dang ok 05-Mar-20 12:22 PM is what you want a boxcar averager? 06-Mar-20 01:08 AM oh no 06-Mar-20 01:08 AM https://twitter.com/johndmcmaster/status/1235730100596830208 06-Mar-20 06:55 AM Would the admins mind if I posted a pdf of a small primer on scalable coherent laser beam combining? I think it's pretty cool, but I figured I'd ask first because it's a pdf you'd download rather than just a link 06-Mar-20 06:55 AM Specifically, it'd be material from a tutorial lecture at a trade show where they talked about the development of this guy 06-Mar-20 06:55 AM https://lumoptica.com/coherent-beam-combining 06-Mar-20 07:37 AM That would go in #resources 06-Mar-20 07:43 AM Humorous discussion last night with my gf about Aperture Science’s IRB. 06-Mar-20 07:43 AM I can just picture the conversations there.... 06-Mar-20 07:43 AM But won’t this experiment inflict long term psychological harm on the human test subjects? 06-Mar-20 07:43 AM Good point. Let’s modify the experiment protocol to mandate that they be incinerated at the conclusion of the experiment. 06-Mar-20 07:58 AM She knows someone who is starting a biotech incubator called Portal Innovations. With a name like that, you have to wonder what they ask their startups to do to weighted companion cubes. And whether any promises of cake can be trusted. 06-Mar-20 08:34 AM They are absolutely gona have cake 06-Mar-20 09:33 AM seriously John knows that guy? ugh 06-Mar-20 09:33 AM and they brought that to a public place to eat??? 06-Mar-20 09:59 AM yep... 06-Mar-20 09:59 AM My god 06-Mar-20 09:59 AM well tbh I would not want to visit their place as well 06-Mar-20 10:11 AM @GigaSquirrel and I had a discussion today about Josephson junctions and ended up without a definitive answer: Will the impurity created by PVD affect the final result or is the inhomogenity in the film irrelevant? 06-Mar-20 10:29 AM https://cdn.discordapp.com/attachments/150333355303370752/685249563585806408/1924b29b.mp4 06-Mar-20 10:29 AM Anyone know what the dosimeter is saying? 06-Mar-20 10:29 AM Outside of the person holding it being an idiot 06-Mar-20 10:32 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/Screenshot_20200306-193157-79252.png 06-Mar-20 10:32 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/Screenshot_20200306-193214-BFA1C.png 06-Mar-20 10:32 AM around 7 mSv/h 06-Mar-20 10:33 AM the display reads 1923.6uS in the beginning 06-Mar-20 10:34 AM And the detector actually looks like it might be fairly accurate for x ray dose 06-Mar-20 10:34 AM Not great. But also not that bad 06-Mar-20 05:18 PM AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA 06-Mar-20 05:18 PM BERYLLIUM IN THE DINER 06-Mar-20 05:31 PM AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA 06-Mar-20 05:42 PM sigh I have identified the likely restaurant that dingus brought his foolishly cut and questionably clean beryllium sheets to. It is a Hobee's, which is a small chain in the SF Bay Area. If I can figure which one exactly, I can get the correct county's public health people over there to survey and decon as needed. This is so painfully careless toward the health and safety of others that it may be drifting toward criminal. 06-Mar-20 06:04 PM <𝓕ermion#6024> Just... straight up beryllium? 06-Mar-20 06:04 PM <𝓕ermion#6024> That’s really horrible 06-Mar-20 06:04 PM <𝓕ermion#6024> Oh btw... is there a safe way to file beryllium copper? I don’t think it has much beryllium but... any beryllium isn’t good. 06-Mar-20 06:04 PM <𝓕ermion#6024> And we routinely have to make small modifications to microwave connectors or little springs for holding samples. 06-Mar-20 06:10 PM Do it with HEPA ventilation, even a small local HEPA vac will do, and wipe down afterward. The dust adds up. And with time, the beryllium oxidizes out of the alloy. This was a rude surprise with a tool crib worth of non-sparking tools. 06-Mar-20 06:38 PM hobees changes their table color surprisingly often 06-Mar-20 06:38 PM , apparently 06-Mar-20 06:41 PM But never that mug and symbol. 06-Mar-20 06:41 PM The Hobee's font and "orange wheel" symbol stands out like a neon sign to me. 06-Mar-20 07:03 PM well, the san jose and sunnyvale hobees have the weird colored plastic tables; all the others look like they've only ever been wood grain, per google maps reviews. sunnyvale has exclusively red tables, seems like, but the san jose hobees is closer in centrality to where i'd expect the two of them to have met, assuming the Be came from who i suspect 06-Mar-20 07:03 PM so some red table at the san jose hobees 06-Mar-20 07:03 PM ohcrap my library card expired and my books are overdue 06-Mar-20 08:37 PM Sunnyvale appears to be the location. Santa Clara Co. Dept of Public Health gets a call in the morning when someone is awake and at work AND not dealing with COVID. As I said when the Fusor Forum post came up, I seriously hope the creator of those sheets owns their home and isn't renting... 06-Mar-20 08:39 PM How’d you work it out? 06-Mar-20 08:42 PM I know the font and logo of Hobee's (a local restaurant chain I grew up with) anywhere. There aren't many of them any more and that particular table color is distinct. Also, it's relatively close to where Usual Suspects live and work. 06-Mar-20 08:42 PM And, if I had to take a guess, this is where the sheet will appear next. https://t.co/lumQ4MYDiU?amp=1 06-Mar-20 08:42 PM I am unfortunately already committed that Wednesday evening and Mt. View is a bit of a haul from Berkeley, or I would interdict. 06-Mar-20 09:02 PM That’s pretty impressive honestly 06-Mar-20 09:04 PM Between personal knowledge and the Army of the Caffeinated also is quite capable with an awful lot of people in infosec. 06-Mar-20 09:04 PM Yeah I saw a few people I recognized from that world over on that tweet 06-Mar-20 09:05 PM Glad to see you do that tbh. A while back we had someone ask the chem server I moderate for help with making an IED, I gave an FBI tip, and they legitimately opened an investigation 06-Mar-20 09:05 PM So they should take this seriously 06-Mar-20 09:05 PM And doing that in general is just...yeah. Beryllium is no joke 06-Mar-20 09:06 PM Unrelated, what’s the chem server? 06-Mar-20 09:07 PM It's the chem server you'd find if you google "science network discord" 06-Mar-20 09:07 PM Which the physics server that's been mentioned a few times is also part of that network 06-Mar-20 09:07 PM I personally found this server because someone in that physics discord said there were a lot of people who know their stuff about vacuums here 06-Mar-20 09:10 PM The Hobee’s in question has been contacted. There was deep confusion and they don’t understand. 06-Mar-20 09:10 PM And I guess for a fair warning about the chem server, homechem is explicitly against the rules because we had a lot of issues with home chemists doing flagrantly unsafe things (worst was someone who made psychadelics for personal use), so we kind of just banned it because it wasn't worth the headache, so if you wanted to join for help with that kind of stuff, don't bother 06-Mar-20 09:11 PM I’m split between academic and a side of home chem, so I might still and just leave one thing to the side. 06-Mar-20 09:11 PM Which reminds me, I need to figure out the rest of the indigo retrosynth 06-Mar-20 09:11 PM And the poor sap who picked up that phone 06-Mar-20 09:13 PM I could give you a link to a more home chem friendly/synthesis focused discord too if you'd like, but fair warning, they're kind of very racist 06-Mar-20 09:13 PM The one I moderate just happens to be full of physical chemists who flirt very closely to physics by pure chance 06-Mar-20 09:13 PM And yeah, poor guys 06-Mar-20 09:14 PM I’ll pass on that, thanks though 06-Mar-20 09:15 PM Can’t be more racist than the #CoinRacists I found on an Internet helldive into Bullion Forums. PROTIP: Never do this. Never again. 06-Mar-20 09:15 PM One guy there is like that, but yeah, overall not THAT bad 06-Mar-20 09:19 PM OTHER PROTIP: if there is a BTC to AU conversion on the header of the site, run far far away. 06-Mar-20 09:36 PM I could give you a link to a more home chem friendly/synthesis focused discord too if you'd like, but fair warning, they're kind of very racist @Mezmorizor what's the server name? If I don't tell yhem my race... How can they racism me? 06-Mar-20 09:36 PM Just joined like almost all of those science network chats 06-Mar-20 09:38 PM I'll PM you an invite link if you'd like. The name is just "chemistry discord" and I'm not sure if you'd have any luck finding it with google. I'm saying the racism less for "they're going to berate you for it" and more for "don't be surprised if someone just casually implies that African Americans are just dumber than everybody else" 06-Mar-20 09:38 PM Which is weird because they're like all European 06-Mar-20 09:38 PM But 06-Mar-20 09:39 PM Ah 06-Mar-20 09:39 PM yikes 06-Mar-20 09:39 PM Well, I'll be going for the chemistry not the conversation 06-Mar-20 09:40 PM Fair, there are quite a few honest to god grad student+ people in organic/organometallic synthesis there, so it's a good resource in that respect 06-Mar-20 09:43 PM @funranium I go to MTVRE with some regularity and if I see a beryllium cutting board knocking around I'll, uh, have things to say 06-Mar-20 09:43 PM probably not your caliber of Things but Things nonetheless 06-Mar-20 09:43 PM i like that restaurant and would prefer it not contaminated 06-Mar-20 09:55 PM If you would be so kind as to say "Please keep that in your bag and don't take it out" I'd appreciate it. Feel free to liberally sprinkle swear words between each word in that quote. 06-Mar-20 11:58 PM That "dw, washed hands after" has the same energy as the "will wear facemask next time" 07-Mar-20 12:17 AM D’aww. He deleted his tweet of his delicious beryllium platter. That’s precious. 07-Mar-20 01:46 AM Oh awesome. A racist Discord and some ftards with beryllium sheets in public places. This is exactly the kind of people I tend to avoid. Please tell me, this server is free of those ^ 07-Mar-20 01:47 AM this server is like the complete opposite, lol 07-Mar-20 01:50 AM Nice to hear✌️ 07-Mar-20 01:53 AM A safe place for all the nerds and weirdos out there 07-Mar-20 01:53 AM (the good kind of weird, at least) 07-Mar-20 02:03 AM Glad to hear 07-Mar-20 02:25 AM Mods are awake, post queer pride 07-Mar-20 02:35 PM My COVID-19 diagnostic device can produce positive results in 17 minutes. Woo! 07-Mar-20 02:38 PM What I'm reading is: My COVID-19 diagnostic device can infect people in 17 minutes. 07-Mar-20 02:38 PM Hahaha 07-Mar-20 02:39 PM no but seriosly, awesome! 07-Mar-20 02:40 PM My coworker who's developing the assay said a very high amount of virus in the sample will produce a positive almost instantaneously. Like less than a minute. 07-Mar-20 02:40 PM what's the rate for false detections? 07-Mar-20 02:41 PM Don't have enough data yet. Also, Newport sent me the wrong optical filters so I had to cobble together a system that uses plastic acrylic for optical filters. Upgrading that next week. 07-Mar-20 02:41 PM It's a little strange to be working on the device, because everyone is like "we need to make 10,000 of these right now!" and I'm like "well it's a single prototype and it still runs off a MATLAB script. Not really ready for 10,000 units yet" 07-Mar-20 02:43 PM heh, whoops 07-Mar-20 02:43 PM best of luck! 07-Mar-20 02:43 PM no pressure, but the whole world is relying on you 07-Mar-20 02:44 PM Haha, well it's probably too late to stop it at this point. 07-Mar-20 02:45 PM ah well 07-Mar-20 02:45 PM it was fun while it lasted 07-Mar-20 04:45 PM Bought a fancy lab oven on eBay. Do I NEED an oven with an Ethernet connection? Yes. Yes I do. 07-Mar-20 04:45 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/image0-46E81.jpg 07-Mar-20 08:08 PM aggggghhhhhhh.. just smoked a STM32F4 discovery board.. and the test board I fixed.. all because I was stupid when moving it when powered on with sloppy cables 07-Mar-20 08:32 PM <𝓕ermion#6024> Anyone know of what the dirt cheapest solution for small AC servos on ebay is? 07-Mar-20 08:32 PM <𝓕ermion#6024> yaskawa, parker, etc. 07-Mar-20 08:32 PM <𝓕ermion#6024> there has to be something cheaper than the 250/axis clearpath charges 07-Mar-20 08:32 PM <𝓕ermion#6024> which... is a pretty killer price for a new servo but still. 07-Mar-20 09:14 PM Like the drive or the whole thing? 07-Mar-20 09:14 PM Matched up sets are usually more than individual components 07-Mar-20 09:45 PM As epilogue to last night's beryllium adventures, it is now in the hands of Santa Clara County. Thank you everyone a for your interest and assistance. I like living a life where I don't wonder if the previous table occupant has been irresponsibly playing with hazardous materials where I'm now eating. 07-Mar-20 10:45 PM <𝓕ermion#6024> @Laughing whole thing 07-Mar-20 11:16 PM <𝓕ermion#6024> also, what fun is there to be had with one of these: https://www.thinksrs.com/products/rga.html 07-Mar-20 11:36 PM Do you intend to be having fun with combustion or detonation products? Good times to be had. 08-Mar-20 10:12 AM <𝓕ermion#6024> I mean I wasn't before but now that you mention it 08-Mar-20 11:05 AM Flame on. 08-Mar-20 01:35 PM @funranium Keep us posted 08-Mar-20 02:14 PM While I'm ready to provide more information to the county if requested, I'll be surprised if they ask. The Dept. of Public Health is a little short handed at the best of times. NARRATOR: These were not the best of times. 08-Mar-20 02:14 PM At the very least, I am going to get to be very educational for some industrial hygienists on Monday who have much less beryllium experience than me now that I have a fresh example for them. To ask how they would approach this problem if it were their actual responsibility to wrangle this. 08-Mar-20 02:44 PM After this shakes out it would be an interesting post mortem to read about. 08-Mar-20 03:19 PM What's the best lattice ICE fpga board to buy, which is compatible with the icestorm toolchain? 08-Mar-20 03:19 PM Glasgow? Or the hx8k dev board?? 08-Mar-20 03:22 PM Are you hellbent on the ICE40 series? 08-Mar-20 03:22 PM there's IIRC one larger Lattice FPGA with yosys and other FOSS toolcahin support 08-Mar-20 03:23 PM No, just don't feel like dealing with the overbearing xilinx or altera toolchains 08-Mar-20 03:23 PM Like, it's always half of the time I allot to playing with fpgas, just for refiguring out how to compile and flash/upload 08-Mar-20 03:23 PM Since I do it so seldom 08-Mar-20 03:23 PM And the Linux support is just wonky 08-Mar-20 03:26 PM At least both have linux support 08-Mar-20 03:26 PM Hell last time i looked the latest Altera(Intel toolchain was only available for linux 08-Mar-20 04:23 PM I think I may have stumbled into the wrong place while looking for photodiodes for x-ray detection 08-Mar-20 04:23 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/Screen_Shot_2020-03-08_at_16.20.33-1C677.png 08-Mar-20 04:31 PM Or a very, very right place 08-Mar-20 04:41 PM Maybe, but other than toying with ideas of a non flying, non explosive replica of the proposed GNAT micromissile, I don’t think that’s quite what I’m looking for 08-Mar-20 04:41 PM @rfs for the older xolinx devboard I have, it only supports kernel 2.8, and to use on windows even, it runs a linux VM with that old kernel 08-Mar-20 04:41 PM Xilinx that or alteras are both just plain HUGE too 08-Mar-20 04:41 PM I think the icestorm stuff is like a tenth the size, and seemingly has a stable API 08-Mar-20 08:13 PM So I heard ice_9 and Spirit were banned... Is that what happened to chucrut too? 08-Mar-20 08:13 PM It feels a bit violating to me if the history of such conversations leading up to a ban have been deleted... Since reviewing the logs my opinion of all of them is completely untainted 08-Mar-20 08:41 PM Not a familiar name to me. I also find nothing related to that name which may indicate removal at a level beyond this server. 08-Mar-20 08:48 PM Yup 08-Mar-20 09:08 PM I was curious what lead up to the bans w/ _ice9 and Spirit too...but also could not really find anything that seemed like an obvious reason for that to happen...so I was assuming it was something very across a line 08-Mar-20 09:16 PM That's my perspective as well, I think both of them contribute a great deal of interesting technical details and can help a lot of people on the server by answering questions 08-Mar-20 09:17 PM Apparently it was something about some radiation thing that was thought to be too dangerous, and rather than having a public discussion about the safety reasons, the mods simply banned them. They couldd have easily just said no more talking about that here. 08-Mar-20 09:18 PM oh their xray projects? i could see that...there were a couple tense safety related conversations on that subject with them involved 08-Mar-20 09:18 PM And of course , now such "mistakes" are open to be repeated by the next people that come in and start building something wacky with no history to help guide them more safely 08-Mar-20 09:18 PM not sure banning was the right answer but that isnt really my place to be saying I suppose 08-Mar-20 09:19 PM I really only ever saw spirit talking about something something microfocus... Which i assumed was for high-def CT imaging 08-Mar-20 09:20 PM That was not the explanation that was given to me. But that project is still very much in its infancy, and it's definitely not going to be built by anyone in a fortnight 08-Mar-20 09:20 PM And honestly they don't even know if it will work yet 08-Mar-20 09:21 PM well i mean Spirit had that actual microfocus system he was starting to play with...so did it involve that? 08-Mar-20 09:21 PM he seemed fairly safety conscious from what I saw but could have been a bit more careful 08-Mar-20 09:21 PM was pretty interesting discussion with their microfocus project though aside from the production unit Spirit had 08-Mar-20 09:23 PM Idk, looking at the most recent stuff __ice9 posted was a twitter post he copied here where he seemed to have made cyanide 08-Mar-20 09:23 PM But I don't think that's illegal 08-Mar-20 09:27 PM yeah no idea what could have lead up to ice getting the boot besides possibly not taking safety input graciously enough (which seems unlikely to be the cause) 08-Mar-20 09:27 PM had some great input on high temperature subjects too 08-Mar-20 09:37 PM Did the same thing happen to churut? I can't search for any of his previous posts, and I definitely cannot recall him doing anything dangerous or rule violating 08-Mar-20 09:42 PM Yeah idk 08-Mar-20 09:42 PM I just recall people (spirit being one of them) getting annoyed at his use of subpar construction/components/chemicals 08-Mar-20 10:42 PM I too am not a fan of people being disappeared mysteriously 09-Mar-20 02:23 AM I am also going to pipe up and say I'm not a fan of things being black bagged. 09-Mar-20 09:41 AM @𝓕ermion I’ve been wondering about RGAs. Are they sensitive to helium? Sensitive enough to be used as a helium leak detector? 09-Mar-20 09:42 AM Yes 09-Mar-20 09:42 AM The RGA we use is literally just a quadruple mass spec, so yes to both 09-Mar-20 09:43 AM We use an SRS300 to measure the ratio of helium clusters of our droplets (He2, He3, He4 etc) 09-Mar-20 09:43 AM You have to use slightly higher than normal filament energies to work well but they’re very usable as leak detectors 09-Mar-20 09:45 AM We do the same, 5*10^-14 Torr detection limit according to the manufacturer 09-Mar-20 09:45 AM I've personally seen it see -12 09-Mar-20 09:49 AM How does sample intake work? I’ve seen helium leak detectors that include what can be used as a roughing pump. 09-Mar-20 09:49 AM Does an RGA work the same way, or do you somehow have to tee it into the vacuum system? 09-Mar-20 10:06 AM The SRS300 has a CF flange you use to couple it to the vacuum 09-Mar-20 10:44 AM Imagine you were using a hot ion gauge 09-Mar-20 10:44 AM It’s just like that in terms of how you mount it / can use it 09-Mar-20 10:45 AM Ok cool, thanks. 09-Mar-20 12:37 PM I wish there was a clear policy on what gets people liquidated from the server. 09-Mar-20 12:37 PM Instead of just people vanishing and details of them being purged. 09-Mar-20 01:03 PM I recommend everyone go back and read Welcome for more clarity. 09-Mar-20 01:06 PM The reasons for spirit getting kicked are pretty hard to see (in the logs). I wonder if they got confused with someone else and were kicked just by their track record, but not a recent incident. 09-Mar-20 01:07 PM No one gets banned because of a single incident 09-Mar-20 01:07 PM But if someone breaks the rules multiple times, even if they are reminded to read them again, they're a lost cause 09-Mar-20 01:07 PM Also, if there is some gross offence the admins might delete the messages before anyone else reads them 09-Mar-20 01:12 PM A note somewhere of “x user banned, general reason” might be a decent idea just to avoid questions of “where’d they go” 09-Mar-20 01:12 PM That's fair, we'll think about that 09-Mar-20 01:15 PM Yeah, a mod said I could explain what happened... Basically ice9 was talking about radiation stuff that was "too hot"... Spirit was apparently just rude repeatedly and the fear was scaring off newcomers or young people 09-Mar-20 02:21 PM It is difficult to explain banning people for being rude. You don’t want to leave the rudeness up for all to see, but also don’t want it to be a mystery, but also don’t want to just shame people for eternity. 09-Mar-20 02:22 PM hence => rule #1 09-Mar-20 02:22 PM Apparently the only messages that got deleted were their last 24 hours, which is an option discord has, which was apparently accidentally not unchecked 09-Mar-20 02:22 PM Personally I am in favor of leaving history unaltered 09-Mar-20 02:22 PM As well as calling out "this behavior is unacceptable, you will be banned now" 09-Mar-20 02:22 PM Otherwise people reading the logs might get the wrong idea 09-Mar-20 02:22 PM @idmb by deleting it though, it leaves my opinion, for example, untainted... They're a great person AFAIK, and now I'm ignorant of why some people think they're unhealthy to interact with 09-Mar-20 02:22 PM As they say in politics, it's a slippery slope 09-Mar-20 02:28 PM Spirit did sometimes give off the sysadmin/helldesk vibe of having dealt with the same questions for a couple of decades without anyone ever learning. 09-Mar-20 02:29 PM You should see him on the styropyro server then 09-Mar-20 02:29 PM I do 09-Mar-20 02:29 PM I'm also there 09-Mar-20 02:29 PM The electronics channel is nostalgic in a sense. 09-Mar-20 02:30 PM <𝓕ermion#6024> Does anyone want an STM controller? 09-Mar-20 02:30 PM <𝓕ermion#6024> we're chucking one 09-Mar-20 02:31 PM #swap-meet you’re off-off-topic 09-Mar-20 02:31 PM <𝓕ermion#6024> oh sorry! 09-Mar-20 02:33 PM thbh styros servers #lasers is sometimes exhausting with people " iHabve 500mW blue, raybans ok?" and the usual folks wanting 500-5000mW pointers as their first lasers and no protective gear ofc. 09-Mar-20 02:33 PM <𝓕ermion#6024> those people make me really, really unhappy. 09-Mar-20 02:34 PM And while Spirit is abrasive, that environment makes one like that. Because it's like that after every video. 09-Mar-20 02:34 PM Tho lately more academic/professional folks have also joined and that fosters a better culture of safety. 09-Mar-20 02:35 PM I feel like the passive/covert attitude/approach of the mods in here is most disturbing... Like, I've been waiting for a few of the banned folks to show up for many weeks. One I even considerer whether they perished since their country was seeing some big riots and such. If I'd have known they were banned, I wouldn't have kept looking to tag them every other day. 09-Mar-20 02:35 PM baby steps I guess. (re: safety in styros server, not the moderation) 09-Mar-20 02:36 PM Also do people ask him to be more polite or just complain indirectly? 09-Mar-20 02:36 PM Others have complained elsewhere 09-Mar-20 02:36 PM I heard he was told several times 09-Mar-20 02:36 PM But I never see people directly saying to chill 09-Mar-20 02:37 PM IIRC he was asked to be less abrasive in styros server. 09-Mar-20 02:37 PM And he did and he did very much focus on safety there. So while a bit abrasive, it was focused on safety and imo not done in ill-will. So I guess the mod team there tolerated that. 09-Mar-20 02:38 PM This is more drama than corona 09-Mar-20 02:39 PM Yeah 09-Mar-20 02:39 PM I feel like I'm gossiping. 09-Mar-20 02:39 PM And tbh that's not a good feeling. 09-Mar-20 02:40 PM Mmm, yeah, I kinda let it derail my evening last night 09-Mar-20 02:40 PM there's a huge difference between telling people to be safe and insulting people 09-Mar-20 02:41 PM @GigaSquirrel but I haven't actually seen any incidents of insult in the logs 09-Mar-20 02:41 PM And it is just rank foolishness to be insulting to mods. 09-Mar-20 02:41 PM That too. 09-Mar-20 02:42 PM Idk, that's like saying the mods are on some pedestal higher and better than the rest of the community 09-Mar-20 02:42 PM Either this is a community or not 09-Mar-20 02:42 PM And if not, well, that's a bit sad 09-Mar-20 02:42 PM There are still power hierarchies 09-Mar-20 02:42 PM Just like in bbs or irc or forum days being a pest, especially towards the sysop/op/mods was a bad idea. 09-Mar-20 02:43 PM This is a community, but sometimes people contribute in a negative way to this community, which is why every community needs people who weed those folks out 09-Mar-20 02:43 PM Heh, I'm just as active on IRC as I am in here, maybe moreso 09-Mar-20 02:44 PM I'm far less active on irc than I used to 09-Mar-20 02:44 PM But I do have hexchat on autorun and autojoin 09-Mar-20 02:45 PM I just stay connected and use SSH to get into my tmux session 09-Mar-20 02:47 PM Zelda Reorchestrated and Instructables IRC were all I ever used 09-Mar-20 02:48 PM screen+irssi works, but with multiple networks and multiple channels per network and how much netsplits ircnet has thesedays it's annoying 09-Mar-20 02:49 PM I'm only on two networks regularly, but in about 15 rooms 09-Mar-20 02:49 PM The automated noise is easy enough to filter out for me mentally 09-Mar-20 02:49 PM Or visually 09-Mar-20 02:49 PM But I'm a programmer by day and used to reading compiler logs and such, where you're often searching for a needle in a haystack 09-Mar-20 02:51 PM Heh 09-Mar-20 04:16 PM FWIW (adding to the above) if I was to behave in the same way I've no doubt the other mods would ban me. 09-Mar-20 04:16 PM Coming from an event organisation background, I'm constantly having to Code of Conduct people in person. It's a really difficult decision to make and one that the mods in this channel really do not take lightly. Unfortunately with stuff like this I don't think there's ever 1 answer that pleases everyone 09-Mar-20 04:36 PM In the future, I'd like to see public warnings when such incidents happen. I think a lot of us were left unaware when messages get deleted and users banned, and as a result we can't trace to any precedence to judge what's acceptable and what's not 09-Mar-20 04:36 PM I think vast majority of people here will have greater respect in the moderators' decisions if they were communicated better immediately after they were made 09-Mar-20 04:43 PM i think we could definitely stand to do better on that front going forward 09-Mar-20 04:43 PM we at least owe it to y'all 09-Mar-20 11:15 PM so nice to finally be getting some decent rain again here in Southern California 09-Mar-20 11:15 PM supposed to be thunderstorms tomorrow which is not super common here 09-Mar-20 11:21 PM extreme jealousy 10-Mar-20 03:02 AM Anybody else got told to work remotely for march? 10-Mar-20 03:02 AM And on my third day… Don't like it. I want to social! 10-Mar-20 03:19 AM I had homeoffice for the last few months 10-Mar-20 03:59 AM And right now I'm at work doing nothing useful but waiting for the file copy 10-Mar-20 03:59 AM Because Windows is a useless piece of... 10-Mar-20 04:47 AM I'm currently in office but work from home fairly often, so they can send us all home if they need 10-Mar-20 04:47 AM If corona goes sideways in the UK I'm being pulled into NHS anyway >.< 10-Mar-20 04:49 AM It will 10-Mar-20 04:49 AM As it will in every country 10-Mar-20 04:49 AM Imho it is foolish to say "we are prepared" 10-Mar-20 04:53 AM We are 100% not prepared 10-Mar-20 04:53 AM NHS is having to rely on people like me leaving our jobs to go support it. Even if enough people do jump onto the NHS volunteering stipend it's still going to fall on it's knees because the British public will go to A&E for anything 10-Mar-20 04:57 AM Awesome! And then there is the problem of protective clothing not being produced fast enough in China 10-Mar-20 04:57 AM Our national health Minister also said such stupid things to keep tension among the masses low 10-Mar-20 04:58 AM Then the fact that hand sanitiser is the price of oil now 10-Mar-20 04:58 AM And oil the price of hand sanitizer 10-Mar-20 04:58 AM Might be better to just burn all the patients instead of treating them 10-Mar-20 04:59 AM tbf FSTE100 is up 3.5% today 10-Mar-20 04:59 AM Might be better to just burn all the patients instead of treating them There was an episode of torchwood that did this 10-Mar-20 05:01 AM FSTE does not solely reflect the fuel prices but the whole market, does it? 10-Mar-20 05:01 AM No but it accurately reflects how doomed the economy is 10-Mar-20 05:06 AM True 10-Mar-20 05:08 AM Hurray! 10-Mar-20 05:11 AM Hurray, we are doomed? 10-Mar-20 05:22 AM To the uk guy here, what would you use to ship a 5 to 10 kg parcel to germany? Looks like royal mail only does 2 kg 10-Mar-20 05:39 AM DHL? 10-Mar-20 05:58 AM I've been told to use https://parcelcompare.com/ 10-Mar-20 05:58 AM will Check that once I'm home 10-Mar-20 07:38 AM I’ve been told my university is on the fence between lockout and doing nothing 10-Mar-20 07:38 AM I can’t do much of my work from home 10-Mar-20 08:04 AM Same here, idmb 10-Mar-20 08:04 AM Finals are all take home, apparently 10-Mar-20 08:06 AM I just don’t get why there’s no intermediate 10-Mar-20 08:06 AM Of “we’ll stop putting 100s of people in rooms, but you can still work solo in your basement lab” 10-Mar-20 08:06 AM At least that’s what has been implied 10-Mar-20 08:08 AM In order to lecture, you need everyone in the class in the same place at the same time. 10-Mar-20 08:08 AM Can't just have like 5 20 person sessions, that'd waste the prof's time 10-Mar-20 08:27 AM My uni does video-record most of the lectures with lots of attendance anyway. In some cases it's because else 500 would need to attend in a room with 400 seats or the like 10-Mar-20 08:31 AM What I meant is they have implied is that they are preparing to lockdown the university, rather than just cancel classes 10-Mar-20 09:07 AM I’m glad I’m in an online university program. 10-Mar-20 09:37 AM fwiw the overbooked class thing is a myth. The fire marshall would be...not happy if you overenrolled a class past its occupancy 10-Mar-20 03:50 PM Pointed out to coworkers that decent Halloween/BDSM plague doctor masks are surprisingly cheap at the moment on Amazon, compared with unavailable N95s. I may have accidentally caused EH&S to dress like plague doctors for the duration. As boss has said many times, "You definitely make the department more interesting." 10-Mar-20 04:06 PM Good work. 10-Mar-20 04:06 PM snrk 10-Mar-20 04:12 PM https://twitter.com/wellerstein/status/1237409597704613893?s=21 10-Mar-20 04:51 PM Weird minds tuned to the same channel. It's good to have that kind of company. 10-Mar-20 04:52 PM I mean the thing is that one doesn't enroll to the lecture at all. One enrolls to the tutor groups and the exams only. 10-Mar-20 04:52 PM So at the start of the semester, for one or two weeks, nobody knows the number of people that's gonna show up. 11-Mar-20 12:54 PM Weird things on the curb 11-Mar-20 12:54 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/image0-EE01B.jpg 11-Mar-20 12:59 PM Is that part of a pump? 11-Mar-20 01:04 PM Yep! 11-Mar-20 01:04 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/Structure-of-Roots-blower-D343E.png 11-Mar-20 01:06 PM BEARS 11-Mar-20 01:09 PM who doesn't love bears ❤️ 11-Mar-20 01:12 PM roller bears, ball bears, thrust bears 11-Mar-20 01:12 PM maglev bears 11-Mar-20 01:15 PM I got too close to a bear last summer 11-Mar-20 01:15 PM was in a little boat near a river and salmon were swimming up it 11-Mar-20 01:15 PM so we were like "hey lets take the boat up the small river and see if we see a bear" 11-Mar-20 01:15 PM found a spot where it got very shallow and so there were tons of dead salmon laying around 11-Mar-20 01:15 PM thought "hmm this seems like a good spot for a bear" 11-Mar-20 01:15 PM few min later up ahead we see a giant grizzly walk around the corner, probably 200-400m ahead 11-Mar-20 01:15 PM slowly shove off the ground and ride back down the river... 11-Mar-20 01:15 PM bear spray was out and ready but, those things are huge 11-Mar-20 01:38 PM Why -if I may ask- we're you trying to find a bear? 11-Mar-20 01:40 PM because who would not want to find a bear 11-Mar-20 01:40 PM https://twitter.com/BearHybrid/status/1182733840286019584 11-Mar-20 01:41 PM because they're very cool 11-Mar-20 01:41 PM like whales 11-Mar-20 01:43 PM You wouldn't download a bear 11-Mar-20 01:44 PM but I'd try to! 11-Mar-20 01:46 PM Oh dang, this exists! 11-Mar-20 01:46 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/f79-2A589.png 11-Mar-20 01:54 PM Once upon a time, I was inspecting the laboratory of a researcher that was exploring spatial perception and language acquisition through the medium of a lot of lasers and bats. Me: Everything looks good but, if I may ask, why bats? Rasearcher: They're easier than whales, which would be best, and the IRB has issues with doing this kind of work on humans. Me: Fair enough. 11-Mar-20 05:25 PM So does anyone know what the people at harvard think the people in dorms will do? 11-Mar-20 05:35 PM If they have a plan, they’re doing a great job holding it close to the chest and not sharing. 11-Mar-20 05:35 PM MIT’s response has been better in my opinion, thought still tinged with a bit of panic. 11-Mar-20 05:59 PM What's up with Harvard? 11-Mar-20 06:19 PM Campus is closed, students evicted from dorms with 5 days notice. 11-Mar-20 06:39 PM we may be closed too.. only two other students showed up today 11-Mar-20 06:39 PM we are gathering tools + watches to work on at home, tomorrow 11-Mar-20 06:42 PM In case anyone is curious, my coronavirus diagnostic device is working pretty well. Hoping there will be a good chance for a clinical trial ASAP. 11-Mar-20 06:42 PM yay.. when will it be deployed at a larger scale? 11-Mar-20 06:42 PM and, how many other companies/governments are working on same/similar? like dont we "only" have testing capacity for under 10k tests a day nationwide? 11-Mar-20 06:44 PM If we get some money, I think it will most likely be 100 or 1000 devices used locally. 11-Mar-20 06:44 PM well, I'm local 11-Mar-20 06:44 PM I love how the schools are all panicing.. yet beershops/pubs/bars are still packed every night 11-Mar-20 06:44 PM My device can test 8 patient samples per hour, so I'm probably on par with the capabilities of some US cities at this point. 11-Mar-20 06:45 PM march 30th is our current target date of: continue 11-Mar-20 06:46 PM My coworker developing the assay now has to work at night since he has to watch his kids during the day since the schools closed. 11-Mar-20 06:46 PM closing cmapus on the 15th, wow 11-Mar-20 06:46 PM unst 11-Mar-20 06:46 PM working nights after being up all day with your kids has gotta suck 11-Mar-20 06:47 PM Yeah, and he said they broke the TV last weekend, so it's going to be especially rough for him. 11-Mar-20 06:47 PM ohhh nooooo 11-Mar-20 06:47 PM but yeah, looks like we have a two week closure - and then spring break 11-Mar-20 06:48 PM Anyone who thinks the virus is going to disappear at the end of march will be sorely disappointed. 11-Mar-20 06:48 PM It will be here for years. 11-Mar-20 06:49 PM do you think it is over-hyped? 11-Mar-20 06:49 PM it's not a zombie plague 11-Mar-20 06:49 PM it's a flu 11-Mar-20 06:49 PM It will likely kill millions of elderly. 11-Mar-20 06:49 PM hrm 11-Mar-20 06:49 PM they're on their way out anyways... >> ... << 11-Mar-20 06:50 PM So in that sense I'd say it's not overhyped. 11-Mar-20 06:51 PM I dont do news, so all I get is second hand.. you coulda told me that we already have a cure and will innoculate everyone in the next 30days and I may beleive you 11-Mar-20 06:52 PM I don't think people in the US realize how prevalent it is already. We're simply not doing any testing so we are probably more than an order of magnitude difference between # of positive test cases and the real # of positive people out there. 11-Mar-20 06:52 PM right, the numbers dont reflect much of anything 11-Mar-20 06:52 PM except for maybe deaths 11-Mar-20 06:52 PM Can't have any positive cases if you don't test! Genius! 11-Mar-20 06:53 PM but asymptomnatic infections? 11-Mar-20 06:53 PM so, I played a co-op board game twice over the weekend, called Pandemic.. you work together to find cures to 4 diseases spreading around the world 11-Mar-20 06:53 PM I have it 11-Mar-20 06:53 PM the board game, that is 11-Mar-20 06:54 PM Haha 11-Mar-20 06:54 PM but, recently played more of it 11-Mar-20 06:54 PM My coworkers say developing a vaccine will be much more difficult than a flu vaccine. 11-Mar-20 06:54 PM the goal is only to find cures... not eradicate.. but if you get too many outbreaks (8) then you lose due to worldwide panic.. or i fyou run out of player deck cards you run out of time.. or if a diseas spreads too much (no more cubes to put down) 11-Mar-20 06:55 PM Is it fun? 11-Mar-20 06:55 PM yeah... and it's co-op.. mos tboard games are very competitive with the people, but with this you gotta work together 11-Mar-20 06:55 PM so it's a bit different 11-Mar-20 06:55 PM it won a few awards years ago 11-Mar-20 06:55 PM https://en.wikipedia.org/wiki/Pandemic_(board_game) 11-Mar-20 06:55 PM oOoo, and they have expansions 11-Mar-20 07:28 PM Oh I've played that board game! 11-Mar-20 07:28 PM it's fun but everyone has to be at the same level or it gets weird 11-Mar-20 07:43 PM Heh, I've been working nights after taking care of my kid during the day since he was born 11-Mar-20 07:43 PM Lately, for the last 9 months, it's been a lot more tiresome 11-Mar-20 07:45 PM setting u p soldering iron again.. batteries in my biccyle power meter (inside the crank arm) shorted out.. replacing with new ones 11-Mar-20 07:45 PM old ones measured under 0.5v, lol.. from 3.7 11-Mar-20 07:45 PM and yeah, some soldering is involved for the connector, kinda lame 11-Mar-20 07:46 PM I used to ride around with the original Quarq crank meter 11-Mar-20 07:46 PM and a powertap wheel before that 11-Mar-20 07:46 PM this is a SRM 11-Mar-20 07:46 PM on sram red 11-Mar-20 07:47 PM ooh fancy 11-Mar-20 07:47 PM yeah.. I have the PC8 head unit too.. in blue - which is not a color option 11-Mar-20 07:47 PM but apparently they made a few more for certain teams 11-Mar-20 07:47 PM all I had to do was ask for it 11-Mar-20 07:47 PM but yup, german made decent equipment, this failure was on me/my riding more than not.. this is the second battery replacement, so I obv sdidnt situate things perfectly before 11-Mar-20 07:47 PM for a conenctor to rub to the point of shorting 11-Mar-20 07:48 PM I remember back in the day hearing that people had to send their cranks in to get the battery replaced or something 11-Mar-20 07:49 PM yeah, they offer that service 11-Mar-20 07:49 PM it's a hassle with this connector 11-Mar-20 07:49 PM you cant buy the battery with the proper connector 11-Mar-20 07:49 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/DSC_1061-9C168.JPG 11-Mar-20 07:49 PM strain gauges on top and bottom of the spider arms/spokes 11-Mar-20 07:49 PM 8 total, iirc (nothing too hidden/illogical) 11-Mar-20 07:49 PM one down, one to go.. 11-Mar-20 08:38 PM and all back together & cleaned up, works 11-Mar-20 08:38 PM check out number 74 on my label maker 11-Mar-20 08:38 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/DSC_1063-7514C.jpg 11-Mar-20 08:38 PM the real reason I was looking it up... 11-Mar-20 08:38 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/DSC_1065-7E14A.jpg 11-Mar-20 10:32 PM Label with all due care and make sure to deface that label when no longer necessary, 12-Mar-20 11:28 AM I'm a bit worried about the second one 12-Mar-20 11:50 AM I figured people here woudl be more worried about the firrst 12-Mar-20 11:50 AM the second one was why I was looking it up in the first place - but as a joke 12-Mar-20 11:50 AM The local makerspace has placed a whole lot of spray bottles filled with isopropyl labeled NOVID-19 around the space. 12-Mar-20 11:51 AM har har 12-Mar-20 11:52 AM The timing is suspect. Someone recently created a stir by creating a #flamethrowing-devices channel on the slack. 12-Mar-20 11:52 AM Coincidence? 12-Mar-20 11:52 AM There's a discussion ensuing about the wisdom of spraying a flammable disinfectant in a shop space. 12-Mar-20 11:58 AM Well, the first one can kill you and injure some others. The right one might sting a lot while dieding but the one in the center is the one that you can actually get very easily in a high concentration to kill everyone ... Patient 0 12-Mar-20 12:14 PM At least they didn’t say COVID-19. That would make as much sense as the ️symbol on Geiger counters (without check sources), which is one of my pet peeves. 12-Mar-20 12:14 PM A spray bottle that said COVID-19 seems like something that would need to be kept in BSL-4. 12-Mar-20 12:20 PM If you ever put the Coronavirus in a SPRAY BOTTLE and keep it in BSL4, you will be fired the day someone finds out it was you 12-Mar-20 01:50 PM I believe coronavirus is BSL3. 12-Mar-20 02:30 PM ...according to my coworker who's been told he will be handling samples... 12-Mar-20 02:32 PM well then 12-Mar-20 02:32 PM he's going to have fun 12-Mar-20 02:33 PM Yeah he doesn't sound very excited about it. 12-Mar-20 03:14 PM As long as he doesn’t put the Coronavirus in a spray bottle.... 12-Mar-20 03:26 PM faculty of science has told profs they are not allowed to move courses online until instructed to ...? 12-Mar-20 03:34 PM UChicago just moved all spring quarter classes online 12-Mar-20 09:27 PM <𝓕ermion#6024> MIT is completely shut down. 12-Mar-20 10:45 PM They have a decon and some professor training to do. 12-Mar-20 11:16 PM mine has cancelled classes over 250, but others are not allowed to be cancelled unless the professor is ill 12-Mar-20 11:19 PM We’ll be entirely online after spring break and a lot of classes are already. They aren’t closing campus down though 12-Mar-20 11:21 PM dang TI is very generous with samples if this email I just got is accurate...requested 5 samples each of a couple things and they are sending me 25 13-Mar-20 03:27 AM KIT and Uni Karlsruhe will be in shutdown until 20.4. 13-Mar-20 03:27 AM Fun ~ 13-Mar-20 04:43 AM huh. 13-Mar-20 04:43 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/unknown-BE346.png 13-Mar-20 04:44 AM That's kinda cool 13-Mar-20 04:52 AM yep 13-Mar-20 07:21 AM haha, yay 13-Mar-20 07:21 AM first corona case in my company 13-Mar-20 07:21 AM not even my building but since I'm just a student worker I've been told to stay home for the next few weeks 13-Mar-20 07:21 AM lots of time for projects, but no money 13-Mar-20 07:21 AM ups and downs 13-Mar-20 10:00 AM I wish I had that time 13-Mar-20 10:00 AM But on the other hand I'm glad I only have to do one more lecture 13-Mar-20 10:00 AM So it really doesn't affect me... Yet 13-Mar-20 10:14 AM " Enter quantity between 1 and 0" excuse me what TI 13-Mar-20 10:14 AM didn't actually expect it to work, given the chip is $2451...but it says they have samples heh 13-Mar-20 12:11 PM getting setup to get some bench time at home.. 13-Mar-20 12:11 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/DSC_1067-588C1.jpg 13-Mar-20 12:11 PM 8 diff lubricants 13-Mar-20 02:30 PM @LRM TI is good with samples. Especially if you have school or work email. 13-Mar-20 07:38 PM There are only 12 people total at our company but the owner is a hypochondriac so I might yet get some time off!!! Hahahahah. Actually being a family business what would most likely happen is everybody else would go home but I being the only person who can do every function in the company would be the lone soldier left manning the ship if we did shut down and honestly I would be fine with that for a little while anyways. 13-Mar-20 10:35 PM working on a UV-C sterilizer for my entryway 13-Mar-20 10:35 PM I got 6x 13W UV-C bulbs and some ballasts and I'm going to build a wooden box with casters that holds them 13-Mar-20 10:35 PM roll it into entryway, connect with remote switch, run for 1 hour every night 13-Mar-20 10:35 PM I also have a box with a couple of cheap germicidal lamps I bought for curing SLA resin that I'm using to sterilize objects that come in from the mail etc. 13-Mar-20 10:35 PM it's really amazing how effective it is; you only need 80 J/m^2 of irradiation to kill 90% of bacteria and viruses 13-Mar-20 10:35 PM so for my current box it's about 5 seconds to kill 90%, 1 minute to kill practically anything in line of sight 13-Mar-20 10:35 PM of course there are places that are not in line of sight so you can run it longer so that diffuse light sterilizes those spots 13-Mar-20 10:35 PM my entryway is 25 m^2 so 2 hours of 80 W irradiation means that the only spots that won't receive at least the 90%-killed dose are those that are exposed to less than 1% of the illumination given to the line-of-sight spots 14-Mar-20 09:26 AM https://twitter.com/MisterHW/status/1238853320707641345 14-Mar-20 10:57 AM all remote: https://libreplanet.org/2020/live/ 14-Mar-20 11:33 AM nature have been aggressively advertising their open access journal on reddit 15-Mar-20 01:07 PM always nice when you are ordering some protoype PCBs, make a mistake, but manage to get the updated design in with enough time to not have to pay shipping again 15-Mar-20 01:07 PM also, surface mount footprints...why do you do this to me 15-Mar-20 04:57 PM Something tells me these chips probably aren't available as samples: 15-Mar-20 04:57 PM https://www.microsemi.com/product-directory/clocks-frequency-references/3824-chip-scale-atomic-clock-csac 15-Mar-20 05:28 PM dem debate is all about coronavirus why 15-Mar-20 05:52 PM Lol funny you're watching that and not even in this country, i don't think I've watched any of them 15-Mar-20 05:53 PM I was hoping I would enjoy it 15-Mar-20 05:53 PM I am not. 15-Mar-20 05:53 PM No wonder nobody votes 15-Mar-20 05:57 PM the only entertaining debates are the ones shortly before the elections between the major candidates 15-Mar-20 05:57 PM and even those are not so much entertaining as much as they are depressing 15-Mar-20 05:59 PM isn't bernie vs biden major? 15-Mar-20 06:01 PM I'm pretty sure Trump's gonna win again 15-Mar-20 06:01 PM in my very pessimistic view as long as Biden manages to sneak by without his cognitive issues becoming too obvious...Bernie's campaign was over on super tuesday (if not before if you consider super delegates) 15-Mar-20 06:01 PM so the dem side of things was decided months ago really, as long as Biden's health holds out 15-Mar-20 06:02 PM In the eyes of the commoner, Bernie's a career politician and somehow that means he's a leach on society... This is coming from the same sort of people who obviously wouldn't hire a career bread Baker to change their car's oil... So it's just goofy logic that is unsensible 15-Mar-20 06:02 PM Obviously you want a career mechanic doing your car work 15-Mar-20 06:02 PM But somehow a career politician isn't in the same basket 15-Mar-20 06:03 PM In the debate every Joe had an example of something specific, he had it on his website and directed people there 15-Mar-20 06:03 PM bernie has been vaguely suggesting youtube search terms 15-Mar-20 06:03 PM for things that should be very specific and obviously were already prepared ahead of time 15-Mar-20 06:04 PM He's pretty damn old, which is understandable as far as knowing about google searching 15-Mar-20 06:05 PM its terrifying that Trump is the youngest man in the race 15-Mar-20 06:05 PM like he asked joe if joe had ever advocated for cutting social securtity (or something similar, don't recall exactly), joe says no, bernie says "well if people at home just look it up on youtube they'll see you're wrong" 15-Mar-20 06:05 PM and it's like come on, that's the easiest thing to not go all [citation needed] 15-Mar-20 06:05 PM trudeau so young 15-Mar-20 06:08 PM i liked Bernie's platform early on in 2016 but i really do not think i want him as president. 15-Mar-20 06:08 PM just don't have a president 15-Mar-20 06:09 PM will be interesting to see how things shake out on the democrat side of the aisle post 2020 if Trump wins again 15-Mar-20 06:09 PM biden basically just said warren would be vice president ? 15-Mar-20 06:09 PM "I commit a woman would be vice president." 15-Mar-20 06:09 PM better than the rumors it was going to be Hillary 15-Mar-20 06:09 PM If not her...? 15-Mar-20 06:09 PM Oh I guess it could be hillary. 15-Mar-20 06:10 PM Could be that alaskan lady 15-Mar-20 06:10 PM Lol 15-Mar-20 06:10 PM Pretty sure she's Republican tho 15-Mar-20 06:11 PM i was disappointed marianne williamson didn't last longer in the race...so much untapped comedic potential there 15-Mar-20 06:11 PM and Tulsi is playing the long game that Biden and Bernie will get coronavirus 15-Mar-20 06:12 PM Never heard of Williamson or Tulsi 15-Mar-20 06:12 PM &trump 15-Mar-20 06:12 PM no way tulsi would win vs trump 15-Mar-20 06:13 PM i sorta doubt that bernie or biden could especially in the current climate 15-Mar-20 06:13 PM if trump dies 15-Mar-20 06:13 PM but yeah tulsi would not even be a statistical blip unless everyone else died 15-Mar-20 06:13 PM I think either bernie or biden would beat whoever else might be republican? 15-Mar-20 06:13 PM that's a nice statement to be able to probably make? 15-Mar-20 06:14 PM hard to say what would happen in that situation... on one hand you lose the rabid Trump cult of personality types (doubt Pence could hold them) 15-Mar-20 06:14 PM on the other hand people love stability and whoever the republican option (if Trump died) would be the continuity option 15-Mar-20 06:15 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/15843213032777047833578602862423-793BB.jpg 15-Mar-20 06:15 PM Most of the population is older than tech worker age... So I'm guessing it's gonna be a republican win, especially with the "vindication" Trump's received 15-Mar-20 06:17 PM also you have to factor in the "X or bust" factions that exist in the democrat party right now with Biden and Bernie 15-Mar-20 06:17 PM X or bust? 15-Mar-20 06:18 PM yes where if bernie isn't the nominee they either won't vote or will vote trump, same for biden losing people wont vote for bernie and will abstain or go trump 15-Mar-20 06:18 PM I know a few folks my age (early 30s) who are so disgusted with the lack of progress in the face of democratic policy, in big cities, that they're likely voting Trump 15-Mar-20 06:19 PM don't less than 60% of people vote? 15-Mar-20 06:19 PM Election Voting Age Population (VAP) % Turnout of VAP 2004 219,553,000 55.7% 2008 229,945,000 58.2% 2012 235,248,000 54.9% 2016 250,056,000 55.7 15-Mar-20 06:19 PM 55-60% or so in recent years 15-Mar-20 06:19 PM yeah that chart haha 15-Mar-20 06:20 PM Heh. 15-Mar-20 06:20 PM Electoral college handles it for them 15-Mar-20 06:20 PM They voted those folks in, surely, right? 15-Mar-20 06:22 PM i actually really like that we have that...or California, New York, and Texas would be the only places any candidates really spent any time/energy on 15-Mar-20 06:23 PM As opposed to spending most of their time on smaller swing states? 15-Mar-20 06:27 PM does it really seem like they do that? 15-Mar-20 06:27 PM maybe more $ in ads 15-Mar-20 06:29 PM https://www.fairvote.org/presidential-campaign-attention-why-most-states-aren-t-worth-any-despite-their-generosity 15-Mar-20 06:29 PM Keep in mind that twice in recent history Dems won the popular vote and lost the EC. Al Gore and Hillary Clinton. 15-Mar-20 06:29 PM it is better than giving 3 states the keys to the castle isn't it? given how many people i know who have left california, how many people i know with one foot out the door, and the reasons i would hate to give the keys to the country to whoever is making the decisions here 15-Mar-20 06:30 PM I don't really understand 15-Mar-20 06:30 PM Are people complaining that despite their state donating a lot, they aren't getting ads? 15-Mar-20 06:30 PM US campaigning is super weird to me, in Canada they're limited to a few weeks 15-Mar-20 06:31 PM I disagree. Popular election would force the candidates to create as widely appealing platform as possible. Not targeting niche states. 15-Mar-20 06:31 PM widely appealing in terms of people 15-Mar-20 06:31 PM People are complaining that because the votes in their states are pretty much pre-determined to favor one candidate, even if they want to vote for the other one their vote won't count at all 15-Mar-20 06:31 PM Winning California or Texas means nothing if there’s no winner-takes-all EC. 15-Mar-20 06:31 PM popular vote makes urban centres decide and rural people have no impact at all 15-Mar-20 06:32 PM ^ 15-Mar-20 06:32 PM Yeah but that's not what you linked Mason 15-Mar-20 06:32 PM that article was all about how much attention they get in terms of rallies and the like 15-Mar-20 06:32 PM not about them not getting policies they want ? 15-Mar-20 06:32 PM people sometimes forget how much of the USA is rural and think the cities should decide everything i guess? 15-Mar-20 06:32 PM Yeah. As an Illinois resident, my vote in the general election is meaningless. A Democrat will always win. 15-Mar-20 06:33 PM Isn't that a result of the electoral college process though? @idmb 15-Mar-20 06:33 PM no that's a result of letting people campaign however they want 15-Mar-20 06:33 PM If popular vote were implemented, then my vote is no different from the vote of, say, a Florida resident. 15-Mar-20 06:33 PM Without rallies, without ads, less people vote and your state's political influence decreases further 15-Mar-20 06:34 PM is that reflected in voter turnout % by state? 15-Mar-20 06:34 PM is it dramatically different between swing states and the rest, I mean 15-Mar-20 06:35 PM Absolutely 15-Mar-20 06:35 PM Popular vote = every vote means something and candidates have to fight for every vote. EC = candidates can ignore their safe states, and count their opponent’s safe states as lost causes, and focus on a handful of battleground states. 15-Mar-20 06:35 PM Like you say that but you guys get WAY more ads than we do in Canada, and our voter turnout is higher 15-Mar-20 06:36 PM Comparing between states and two different countries with entirely different political system doesn't seem very fair 15-Mar-20 06:36 PM You can get people to vote without tons of advertising. 15-Mar-20 06:36 PM That's the only statement 15-Mar-20 06:39 PM Well, advertising and education is certainly very impactful. How do you get to the point of everybody realizing that their vote is the most important thing for a functioning democracy? Education and advertisement, plus an existing confidence in the political system 15-Mar-20 06:39 PM EC does not help any of that in population centers, so voter turnout drops 15-Mar-20 06:42 PM what if abolishing the EC does not improve voter apathy? 15-Mar-20 06:42 PM What makes you think that would be the case? 15-Mar-20 06:43 PM I don't see how it doesn't just shift it 15-Mar-20 06:43 PM from a weird setup of specific states mattering a lot 15-Mar-20 06:43 PM to just cities vs rural people 15-Mar-20 06:43 PM california already has >100% voter registration and only like 58% turnout 15-Mar-20 06:43 PM federally voter turnout would probably go up. 15-Mar-20 06:44 PM getting more people registered didn't help voter turnout here despite it being so easy to register and to vote that it gives me some concerns haha 15-Mar-20 06:45 PM Aren't you pointing out exactly what the problem is @LRM ? A big populated state, with lots of registered voters but no one actually thinks their vote is important enough to warrant their time to go out and vote? 15-Mar-20 06:45 PM Yeah I don't understand LRM's argument there. If it were popular vote, I would expect California to vote more. 15-Mar-20 06:46 PM why are you assuming the 40% do not vote because they do not think it matters? 15-Mar-20 06:47 PM Why else would people not vote? 15-Mar-20 06:47 PM isn't it always 15-Mar-20 06:47 PM they have the option to vote if they want to....it definitely matters on a state level to vote...they just do not want to get involved at all 15-Mar-20 06:47 PM (importance of voting) / (effort of voting) 15-Mar-20 06:47 PM 90% of the people i know who do not vote just do not want to take the time to actually read what they are voting for 15-Mar-20 06:47 PM they know it has an impact on their lives 15-Mar-20 06:47 PM they know they can have a say 15-Mar-20 06:47 PM they just do not care 15-Mar-20 06:47 PM it isnt because they do not think it matters, they know it does, they do not care 15-Mar-20 06:48 PM What do you mean they do not care? 15-Mar-20 06:48 PM it mattering is the combination of the vote counting towards who wins, and what level of policy change / the impact of whoever wins winning 15-Mar-20 06:50 PM So you're saying that people lack the realization that they play a role in democracy? If so, candidates spending more time to tell them why they should care, implementing policies that affect them on a local level after the election and generally more exposure to the political process is even more important right? 15-Mar-20 06:51 PM they know they play a role they just literally do not care. even when explaining to them how things they could go vote on will personally impact them. 15-Mar-20 06:51 PM maybe these are just the people i know but i really do not think that abolishing the EC to try and get more voter engagement would change a thing 15-Mar-20 06:51 PM might even make it worse 15-Mar-20 06:52 PM I definitely think it would change things 15-Mar-20 06:52 PM It's not just about more voter engagement neither, it's about fair engagement and less people feeling they were not represented 15-Mar-20 06:52 PM and I definitely think the EC is a mess 15-Mar-20 06:52 PM and I definitely think the way people understand it is a mess - what % of the population do you think could concisely explain it in writing if given 3 hours and no internet? 15-Mar-20 06:53 PM not saying the EC isnt a mess...just i think it is as good a compromise as we have found so far. 15-Mar-20 06:53 PM less than 10% 15-Mar-20 06:54 PM there are a lot of ways to "do" democracy 15-Mar-20 06:54 PM I like that in canada we're talking about proportional representation already 15-Mar-20 06:54 PM rather than scrapping the election of parliament members in favour of popular vote 15-Mar-20 06:54 PM despite the value of a specific vote varying hugely here 15-Mar-20 06:58 PM Isn't proportional representation the democratic ideal? 15-Mar-20 06:58 PM And don't we all agree that gerrymandering and other political devices meant to skew the result to one side or another bad? 15-Mar-20 07:00 PM absolutely 15-Mar-20 07:00 PM in canada - older provinces (because canada was originally smaller) have MUCH more representation 15-Mar-20 07:00 PM per person 15-Mar-20 07:00 PM but since vancouver and toronto have all the people, that's slightly balanced out 15-Mar-20 07:00 PM but there's still a lot of rural representation 15-Mar-20 07:00 PM https://www.youtube.com/watch?v=7wC42HgLA4k 15-Mar-20 07:02 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/unknown-81B12.png 15-Mar-20 07:02 PM see % popular vote vs % seats 15-Mar-20 07:02 PM NDP and Green get slaughtered that way 15-Mar-20 07:06 PM So that's probably the root of a bipartisan system 15-Mar-20 07:06 PM And consequently more and more polarization 15-Mar-20 07:16 PM Also encourages strategic voting too, that is voting against what you believe to be your best interest to end up with a "less worse" result 15-Mar-20 07:17 PM that's pretty hard to avoid 15-Mar-20 07:18 PM Hard to avoid in a first-past-the-post system, not the case with true proportional representation 15-Mar-20 07:18 PM well there's a bunch of PR systems proposed 15-Mar-20 07:19 PM https://en.wikipedia.org/wiki/2011_United_Kingdom_Alternative_Vote_referendum 15-Mar-20 07:20 PM we had a vote for those provincially here 15-Mar-20 07:20 PM But since this is obviously against the interests of major parties already elected to power, most alternative solutions will likely fail 15-Mar-20 07:20 PM canadian liberals promised the previous election would be the last with fptp 15-Mar-20 07:20 PM and then did nothing to change it while elected 15-Mar-20 07:20 PM it was a prevalent campaign promise 15-Mar-20 07:21 PM Things look different once you're elected, doesn't make sense to get rid of the system that got you there in the first place 15-Mar-20 07:23 PM bring on last past the post 15-Mar-20 07:23 PM everyone gets to decide who they hate the most 15-Mar-20 07:23 PM lowest score wins 15-Mar-20 07:24 PM Would make funny debates 15-Mar-20 07:25 PM in the US you could turn the primaries into survivor 16-Mar-20 10:04 AM creating a coronavirus diagnostic and the Karen in the purchasing department keeps putting up roadblocks because I'm not using "approved vendors" and "exceeding cost thresholds". uuuugggghhhhh!!!!!! 16-Mar-20 10:04 AM not a good time to be citing department policy blah blah blah, lady! 16-Mar-20 10:33 AM do you have a false negative rate yet? 16-Mar-20 10:44 AM Reminds me of when the university made my boss get quotes from three different vendors for an OPO system that only lockheed martin made at the time 16-Mar-20 10:44 AM Literally had to get other people to send a quote saying "we do not have a comparable system" 16-Mar-20 10:50 AM anyone have a source for high molecular peg/peo ? 16-Mar-20 10:50 AM Looking for around 1Mda mw 16-Mar-20 10:50 AM for home use so can’t go through Aldrich or whatnot 16-Mar-20 11:11 AM Canadian borders closed except to permanent residents, except US flights?! 16-Mar-20 11:11 AM oh @Mezmorizor any purchase over $3,500 we have to put a purchase order auction on our online system 16-Mar-20 11:11 AM so for buying turbopumps and the like 16-Mar-20 11:11 AM even though we all already price out competitor quotes before buying anything 16-Mar-20 11:11 AM so to speed things up / not have randos bidding on stuff 16-Mar-20 11:11 AM we just overspecify the requirements 16-Mar-20 11:11 AM it was fun with my laser, since only coherent and spectra physics could offer anything at all... 16-Mar-20 11:13 AM Well, that sounds very stupid 16-Mar-20 11:14 AM lets just say I have made quite a few $3000 orders from swagelok and lesker... 16-Mar-20 01:58 PM Karen...you're letting the team down. 16-Mar-20 07:35 PM @Noxz is there any chance you have been trained in quartz watch repair? 16-Mar-20 07:36 PM Yup, we mostly did ETA 255 and 955 service (actually oiling jewels, which are 1/10 the size of mechanical jewels) 16-Mar-20 07:36 PM Onr quarter is quartz service and theory 16-Mar-20 07:36 PM I'm doing a 7750 right now, modern auto chronograph 16-Mar-20 07:36 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/DSC_1090-64C1D.JPG 16-Mar-20 07:37 PM I have a much beloved Polimaster PM1208M dosimeter watch 16-Mar-20 07:38 PM Not familiar with it, do you know any issues? 16-Mar-20 07:38 PM Has a RONDA 763 quartz movement 16-Mar-20 07:38 PM Ahh, good ol ronda 16-Mar-20 07:38 PM And the quartz movement part died. The second hand would twitch but not advance. Change of battery did nothing. 16-Mar-20 07:39 PM Sometimes its just a movement swap if not servicable 16-Mar-20 07:39 PM Sending it back to Polimaster was a nightmare. 16-Mar-20 07:39 PM Unst 16-Mar-20 07:39 PM Well it's an incredibly thick watch. It's got a geiger counter board and the quartz movement. 16-Mar-20 07:39 PM Oh neat 16-Mar-20 07:40 PM Poli fixed it and sent it back. Took forever. I almost gave it up for lost. 16-Mar-20 07:40 PM And then about a year later, same darned thing. 16-Mar-20 07:40 PM Dosimeter board works perfectly. 16-Mar-20 07:41 PM Watchmaking bench is taking up keyboard space, so on phone, I can look into it all in an hour or two when I am done with this 7750 16-Mar-20 10:14 PM that took me 4hrs to assemble at home, with a few disturbances - and dropping parts into the carpet 16-Mar-20 10:14 PM takes me under 3 at school - but I've only done it a handful of times thus far 16-Mar-20 10:14 PM it's the new movement we are learning 17-Mar-20 10:49 AM North Seattle College is operating remotely March 16-27. The instructional plan and timing of spring quarter will be confirmed and shared this week. 17-Mar-20 10:58 AM Meeting with my boss in 30 minutes to discuss my coronavirus test. He's been on sabbatical in Texas. Immunocompromised from chemotherapy and he hopped on a plane to come into Seattle (coronavirus capital) to meet with people. What could go wrong? 17-Mar-20 11:02 AM OOF 18-Mar-20 12:25 PM Productive morning 18-Mar-20 12:25 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/image0-8B131.jpg 18-Mar-20 02:02 PM Taking this time to turn my garage into more lab space. Adding extra power outlets, insulation, heating vents, and a utility sink. 18-Mar-20 02:23 PM I've pretty much been given the green light to "spend whatever it takes" to produce more covid-19 diagnostic devices. Easier said than done! 18-Mar-20 02:23 PM Luckily everyone seems to want to be able to help. Just ordered 200 custom optical filters from Newport. They were pretty happy to help and said they'll try to give me priority. Sweet! 18-Mar-20 02:23 PM It's pretty overwhelming to go from a single prototype built on a shoestring budget to "we want lots of them right now no matter the cost" 18-Mar-20 02:56 PM If anyone's interested there's a covid19 digital hackathon starting Monday for like 3 weeks. https://hackquarantine.com 18-Mar-20 04:24 PM @piGuy sounds awesome! 18-Mar-20 07:10 PM I would be useless at it. I’m a hardware engineer! Hahahaha 19-Mar-20 02:11 PM rip 19-Mar-20 02:11 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/Screen_Shot_2020-03-19_at_2.10.51_PM-9AF2F.png 19-Mar-20 02:11 PM shoulda stocked up on gaskets earlier 19-Mar-20 02:32 PM Saw that email a few days ago too 19-Mar-20 02:32 PM Sad times 19-Mar-20 02:32 PM in other news, this is pretty nice https://www.standard.co.uk/news/world/dolphins-venice-canals-coronavirus-lockdown-italy-a4390686.html 19-Mar-20 03:34 PM my university just sent out the semi-final email I suppose 19-Mar-20 03:34 PM All research suspended until April 15th. Locked out of buildings, can get quick exemptions until march 24th to shut things off. Have to file a more formal one for longer term exemptions such as maintaining animals, "extremely expensive reagents," and research on COVID-19. 19-Mar-20 03:37 PM wonder what counts as 'extremely expensive' 19-Mar-20 03:46 PM Probably the very large helium recirculation systems? IDK, I imagine it would have to be a four figure loss before they'd let one person go in regularly 19-Mar-20 04:00 PM from a very cynical point-of-view, losing one tenured prof with a fully funded lab is at least a 7 figure loss to the university, right? 19-Mar-20 04:56 PM Loss? You mean savings! 19-Mar-20 05:04 PM salary << value of research 19-Mar-20 05:37 PM Yeah, labs have a huge amount of what I call research inertia. Basically a combination of esoteric knowledge and equipment 19-Mar-20 05:37 PM End result being that it's hard to switch directions and hard for others to come in 19-Mar-20 05:47 PM I don't have a lot of experience with post-docs, since we've never had any, but it seems that quite a few of them would be ready to run their labs for at least a few years (in terms of having reasonable research goals / plans) 19-Mar-20 05:48 PM Good ones probably could, but there are some bad post docs out there 20-Mar-20 12:05 AM well tonight has been fun... 20-Mar-20 12:05 AM hard drive decided to crap out suddenly (hopefully just the boot info) and i thankfully had a spare SSD 20-Mar-20 12:05 AM loaded up ubuntu to at least have a computer again...cant find my win10 recovery or install media and my dad is borrowing my external drive housing so i will have to grab that tomorrow 20-Mar-20 12:34 AM @LRM well hopefully this inspires you to not be as dependent on Windows ;) 20-Mar-20 12:34 AM I only use Windows regularly on my work-provided laptop, orherwise all my home systems use some form of linux (and a few have dual boot enabled, but I pretty rarely start them into Windows) 20-Mar-20 12:37 AM i mostly need it for Fusion 360 but it isnt a huge set back as all my machining customers are shut down for the duration of the pandemic starting tomorrow 20-Mar-20 12:37 AM if not for the pandemic going on things would be way more urgent 20-Mar-20 04:46 AM yay lockdown 20-Mar-20 07:34 AM I will be quite sad if my gaming desktop dies during this 20-Mar-20 07:34 AM Don’t have a spare gpu and still running a 7950 20-Mar-20 08:13 AM yeah that would really suck 20-Mar-20 08:13 AM esp. with doom today and alyx in a few days 20-Mar-20 08:13 AM I'm already in love with the new doom 20-Mar-20 08:33 AM I barely play anything 20-Mar-20 08:33 AM but... I might 20-Mar-20 08:35 AM gotta spend the time somehow 20-Mar-20 08:35 AM but I'm making an effort not to spend all my time on my pc 20-Mar-20 08:46 AM about three weeks ago we spent ~$100+ printing a ton of photos we've taken 20-Mar-20 08:46 AM and so now we're putting them up 20-Mar-20 08:46 AM just endless walls of photos of things 20-Mar-20 08:48 AM that sound like fun 20-Mar-20 08:49 AM and the beer we're brewing is ready to be bottled 20-Mar-20 08:49 AM and uh... we have enough flour for another 2-3 loaves of bread? 20-Mar-20 08:50 AM sounds like you're all set 20-Mar-20 08:50 AM only have 1.5kg of coffee beans though 20-Mar-20 08:50 AM that's what, a weeks supply? 20-Mar-20 08:50 AM 'tho my coffee consumption went down, now that I don't have to get up as early 20-Mar-20 08:52 AM Most of you do all your sciencey stuff at home right? like none of you are renting a separate space for it that you can't access during this? 20-Mar-20 08:52 AM afaik yep 20-Mar-20 08:53 AM sounds productive 20-Mar-20 08:53 AM I have a ton of raspberry pis, that's the cloest thing to lab stuff I've got at home 20-Mar-20 08:54 AM let them run in a cluster and simulate a lab 20-Mar-20 08:54 AM all depends on what you like to do 20-Mar-20 08:55 AM I like to be in my lab 20-Mar-20 08:55 AM a friend of mine is studying computer science and hasn't left his house since we gave him a pi for his birthday 20-Mar-20 08:55 AM I've had pis since release 20-Mar-20 08:55 AM I always got the new ones that came out and was always disappointed 20-Mar-20 08:56 AM Did you ever have the original 256mb one? 20-Mar-20 08:56 AM I guess I just expected the wrong things, as esp. the first ones could not even play youtube videos 20-Mar-20 08:57 AM The "best thing" that was very easy to do with the first one IMO was making wired printers wireless 20-Mar-20 08:57 AM very easy to do with CUPS, even on printers a couple decades old. In terms of effort to do and the "added value" that was amazing 20-Mar-20 08:57 AM the Pi 2 did actually amaze me 20-Mar-20 08:57 AM because it could... do stuff 20-Mar-20 08:59 AM yeah, that's my issue, when it comes to PCs I'm definitely on the user side of things 20-Mar-20 09:00 AM the pi zero w 20-Mar-20 09:00 AM Is a really nice piece 20-Mar-20 09:00 AM and only $3.14 on sale 20-Mar-20 09:00 AM zoom stock is soaring lol 20-Mar-20 09:20 AM the pi zero w makes a great little control-this-one-dumb-thing computer, i had one but i fried it with an aftermarket battery backup shield 20-Mar-20 09:20 AM also ooh sale 20-Mar-20 11:08 AM We were using pi zeros for a low volume (like 20 units) embedded application where we just needed a GET THIS THING ON THE INTERNET application. Worked pretty well. Gave us the ability to handle SSL too. Also wrote a little python handler to wrangle a cell module. 20-Mar-20 11:12 AM A friend is using orange pi nano's for mebedded stuff 20-Mar-20 11:12 AM More available than pi zeros and good gpio 20-Mar-20 11:14 AM $3.14 does sound like a nice sale, but I've not done anything much with the existing pi zero I've got 20-Mar-20 11:14 AM I use my stock of arduino nano or mega more 20-Mar-20 11:15 AM "3.14 on sale" Never seen it anywhere where I could get it for less than 20eur 20-Mar-20 11:15 AM The new kid on the block, not so new anymore, the esp32 is something i still haven't played with even though I've got a few 20-Mar-20 11:15 AM Same 20-Mar-20 11:15 AM It seems nice but I'm not that much of a developer. Even if the extra power could help me deal with stupid naive code. 20-Mar-20 11:16 AM The pi zero w is available in store now for$5 at microcenter, but that's more south/east U.S. 20-Mar-20 11:16 AM Yeah the esp32 can run micropython, which is pretty darn nice 20-Mar-20 11:17 AM Yeah it's usually 10usd for the zero w and then 10-25usd shipping. Every Single Time 20-Mar-20 11:17 AM Like how CHIP was 9usd + 20usd shipping 20-Mar-20 11:18 AM Yeah didn't hear much about that after the initial campaign 20-Mar-20 11:18 AM Did it ever become real? 20-Mar-20 11:24 AM 20eur for a pi zero w? yikes 20-Mar-20 11:24 AM I have a bunch of pi 2s with cameras 20-Mar-20 11:24 AM a company bought a few hundred to set up a 3d scanner 20-Mar-20 11:24 AM got their software working 20-Mar-20 11:24 AM then upgraded them all to something 20x as expensive 20-Mar-20 11:28 AM I was planning on using my pi zero with my first gen camera to make a droplet contact angle meter... But likely will just use the existing optical microscope camera for now along with holding a transparency paper protractor on the LCD screen 20-Mar-20 11:28 AM Got the requisite camera to pi zero cable from AliExpress for like a dollar a month or two ago 20-Mar-20 11:28 AM Shipped from Kyrghyzstan surprisingly 20-Mar-20 11:28 AM Got something else recently, I think a pi camera lens extension, shipped from Namibia or Zaire or something strangely not the expected China 20-Mar-20 11:47 AM motioneyeos 20-Mar-20 11:47 AM godsend 20-Mar-20 02:07 PM The prices of really powerful MCUs are insanely low, the Allwinner F1C100s with a single core 900MHz ARM chip and 32MB of RAM is less than $2 a piece 20-Mar-20 02:07 PM This little kit for the Lichee Pi that use that chip includes a WiFi module, a 5" resistive touchscreen and a little adaptor is $20 20-Mar-20 02:07 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/O1CN010pKbuN24dCcO1MZyY_2203137857413-B63C7.png 20-Mar-20 02:07 PM And yes, it runs micropython in embedded Linux 20-Mar-20 02:07 PM Perfect for HMI applications 20-Mar-20 02:07 PM If you want something more powerful, there's also the A33 SoC, with a quad core 1.5 GHz ARM Cortex-A7 CPU and a Mali400 GPU, runs Android and embedded Linux perfectly fine 20-Mar-20 02:07 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/O1CN015bHXA01xrfo1vWW55_352116497-4C8DE.png 20-Mar-20 02:07 PM With a 7" capacitive touchscreen, this dev board is only $23 20-Mar-20 02:07 PM If you order directly from the factory seller, which is what I'm doing 20-Mar-20 02:25 PM I'm actually tempted to shift away from STM32 onto this just for interface applications, just so freaking cheap and more powerful than running a demanding graphics application on a resource strained MCU. Not to mention all the broken HMI toolchains for the CubeIDE 20-Mar-20 02:33 PM do those have wifi? 20-Mar-20 02:33 PM that's what's so great about the pi0w 20-Mar-20 02:33 PM Both have WiFi through the little USB dongle thing included with the kit 20-Mar-20 02:34 PM ah, so back to $20 apiece 20-Mar-20 02:34 PM but with other stuff 20-Mar-20 02:34 PM The second board also have drag and drop UI development tools integrated into the IDE, which runs on windows by the way 20-Mar-20 02:34 PM PI can run labview software 20-Mar-20 02:35 PM It's essentially the same spec as a Raspberry Pi 4 model B, the newest one 20-Mar-20 02:35 PM Processing power wise 20-Mar-20 02:35 PM IOs are a bit lacking, but this board is really meant for HMI applications 20-Mar-20 02:35 PM And it's easy enough to directly solder either of these boards onto your own PCB 20-Mar-20 03:42 PM The IDE is basically copy-paste Eclipse, with a dedicated tab for drag-and-drop GUI development. It comes with extensive examples and a very basic HAL-like library for interacting with your GPIOs, WiFi, on-board ADCs, SPI, I2C... etc. 20-Mar-20 03:42 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/unknown-51BB2.png 20-Mar-20 03:42 PM You can edit the automatically generated code for each widget in its own .cc file, and you can make your own widgets too it seems 20-Mar-20 03:42 PM Since this is just the default Eclipse compiler and everything is in C++, you can import whatever library or interact with the registers if you so wish. The major downside is that there's almost no English support and multilingual hardware documentation is lacking 20-Mar-20 03:42 PM I actually like their pretty simple HAL in favor of the HAL from STM32... 20-Mar-20 03:42 PM Just really easy to get started for newbies and lazy people 20-Mar-20 03:42 PM https://linux-sunxi.org/A33 20-Mar-20 03:42 PM Documentation for the SoC on the board 20-Mar-20 03:58 PM Links to buy? 20-Mar-20 03:58 PM https://www.aliexpress.com/item/4000494207470.html 20-Mar-20 03:58 PM This has a hefty foreigner markup unfortunately 20-Mar-20 03:58 PM But you get free shipping, and $48 with a 7" capacitive touchscreen isn't that much, certainly a lot better than Raspberry Pi 4 20-Mar-20 03:59 PM I found this recently https://t.co/Z7U7upvj0P?amp=1 20-Mar-20 04:01 PM If you want to play with FPGAs, I bought a Zynq dev board recently too 20-Mar-20 04:01 PM http://www.chinaqmtech.com/xilinx_zynq_soc 20-Mar-20 04:01 PM https://www.aliexpress.com/item/4000323573953.html 20-Mar-20 04:01 PM I think for fast data processing and interfacing with superfast 16 bit ADCs, this is very nice since the MCU is on the same chip as the FPGA, and you can make use of both of them in the same development environment 20-Mar-20 04:10 PM Have you used that one? 20-Mar-20 04:10 PM No, still waiting on these boards 20-Mar-20 04:10 PM And struggling to learn Vivado 20-Mar-20 04:22 PM At least Vivado is better than XISE 20-Mar-20 04:22 PM I can't imagine anything worse than Vivado right now, but then again I am only 3 days into the FPGA learning cliff 20-Mar-20 04:23 PM XISE was worse. 20-Mar-20 04:23 PM I learned on Xilinx X ISE webpack 20-Mar-20 04:25 PM The project is to develop a super overkill MCA for nuclear instrumentation, should have a flexible front-end board with a 16 bit ADC at >5 Msps, with amplifiers too. The main goal though is to learn more about FPGAs and analog circuit design, not to actually make a profitable commercial product 20-Mar-20 04:31 PM @GigaSquirrel tomb raider 2013 is free on steam if you don't have it 20-Mar-20 04:32 PM must ... not.. .buy... another game 20-Mar-20 04:32 PM XD 20-Mar-20 04:32 PM nah, if I buy more I'll never get anything productive done during the quarantine 20-Mar-20 04:35 PM So instead of a game, an fpga dev board? 20-Mar-20 04:35 PM still got some STM32s here that want attention 20-Mar-20 04:35 PM is giving up this whole physics thing for animal crossing, personally 20-Mar-20 04:36 PM well for me it's the new doom 20-Mar-20 04:36 PM it's soooo good 20-Mar-20 04:36 PM and in a few days it will be half life alyx 20-Mar-20 04:36 PM Heh, I just bought an icebreaker and ulx3s @Mason_Yu 20-Mar-20 04:36 PM I can't really stand the whole closed toolchain for xilinx or altera 20-Mar-20 04:36 PM It's simply not fun, and with as little time that I can devote to fpga learning these days, it needs to be as fun and painless as possible 20-Mar-20 04:38 PM I dont have a VR headset nor a good GPU, so no half-life alyx for me 20-Mar-20 04:38 PM I'm certainly not having fun at the moment, it just feels really dry and complicated to me 20-Mar-20 04:38 PM I'd sit in front of the laptop for an hour at a time and get nothing done, then give up and try again in a few hours. I'll look into the boards you bought 20-Mar-20 04:40 PM You need more fpga4fun.com in your life ;) 20-Mar-20 04:40 PM Yo that's fantastic 20-Mar-20 08:49 PM tool purchased today, will be shipped next week: Toolmaker's Microscope, 10x, 20x, and 30x objectives, with built in optical comparator screen, and various accesories.. also the digital version but no controller 20-Mar-20 08:49 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/s-l1600-9F3E2.jpg 20-Mar-20 08:49 PM vintage german optical machinery 20-Mar-20 08:49 PM will be buying quite a few vintage Leitz stuff in the next few days 20-Mar-20 08:49 PM extended spring break, so why not have it delivered when I am home 20-Mar-20 08:49 PM and the other bit of kit that will be finalized this weekend.. 20-Mar-20 08:49 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/s-l1600-DE7E7.jpg 20-Mar-20 08:49 PM without the stand, for shipping reasons 20-Mar-20 08:49 PM and non original stand 20-Mar-20 09:06 PM oi, he just gave me dimesnions of the bed.. ~13.5” x ~53.5” 20-Mar-20 09:06 PM ~1.35m long 20-Mar-20 09:22 PM I'd say 300.. 350kg? 20-Mar-20 09:22 PM (the microscope is only 100kg) 20-Mar-20 10:24 PM Nice! 20-Mar-20 10:24 PM Gonna be quite the move if you eventually head back east 20-Mar-20 10:36 PM that's a nice chonky bed 20-Mar-20 11:01 PM so...what is that exactly? not sure i recognize that collection of equipment besides some of the piece parts 20-Mar-20 11:55 PM second image is an optical dividing head - basically rotary/angular measurements - will use it to make 'index plates' for making gears 20-Mar-20 11:55 PM ie, plates with 64, or 80, or whatever number of holes per tooth 20-Mar-20 11:55 PM there are a few more things to it, too, as it was designed for more than just that 20-Mar-20 11:55 PM first is of a toolmakers microscope - which basically gives you an XY table (plus sometimes rotary) and a silhouette of the part, and in the eyepiece it has a pattern such as radius and whatnot, so you can look at corners and compare, and also determine lengths/widths, etc 20-Mar-20 11:55 PM they were essentially replaced by CMMs 20-Mar-20 11:55 PM but they still have their use on the shop floor, even if only for quick inspection 20-Mar-20 11:55 PM that rotary table/dividing head has it's own t slotted bed with some tailstocks and some specific measuring testers.. one for cam profiles (there are heart shaped cams in chronographs which allow the hammer to reset back to 0 - so I will actually use it as such, and also for roundness tester) 20-Mar-20 11:55 PM I am also going to pickup the internal bore inspection head which can mount on the microscope 20-Mar-20 11:55 PM contact + optical based - I think 20-Mar-20 11:55 PM all of it is heavy optics 21-Mar-20 12:09 AM ahh okay i recognized the dividing head as that but wasnt sure if it was just that + base and tailstock/etc or was a whole specialized machine unto itself. guess that might be mostly intended to use as a rotary indexing inspection station in its original life? 21-Mar-20 12:11 AM more or less, the manual does state the bearings are good enough for milling + grinding - and they even offered a grinding spindle for that table 21-Mar-20 12:11 AM too bad I dont have that attachment, but my grinder should do just fine, but need to move the dividng head on over - which it likely weighs 100kg by itself 21-Mar-20 12:11 AM that faceplate mounted on it is 10" .. for size reference 21-Mar-20 12:11 AM that dividng head + table was once owned by professional instruments, PI, the air bearing/spindle company 21-Mar-20 12:13 AM very cool as long as you have the space for it 21-Mar-20 12:13 AM hahaha.... yeeeaaaahhhh 21-Mar-20 12:13 AM starting to get tight on space 21-Mar-20 12:13 AM and i hope you have a shop crane/engine hoist 21-Mar-20 12:13 AM not really, but yes 21-Mar-20 12:14 AM theyre rough in tight spaces but i love them for moving heavy stuff around 21-Mar-20 12:14 AM engine hoist, yes.. but that's not really for moving things in a house too much 21-Mar-20 12:14 AM ooooh right i always forget you have this stuff actually in your house and not a garage 21-Mar-20 12:14 AM cement floors are a must for the hoists 21-Mar-20 12:14 AM will be moving soon enough, but figure I cant pass up on items like this - that I basically need 21-Mar-20 12:14 AM 1k ft workshop space is basically what it'll be 21-Mar-20 12:15 AM though i did use mine on asphalt a couple times...the noise is something else! 21-Mar-20 12:16 AM the micoscope is easy enough to move with two people.. 21-Mar-20 12:16 AM that table though is going to be more of a concern 21-Mar-20 12:16 AM not terrible, but not nice 21-Mar-20 12:16 AM and things can be removed from it 21-Mar-20 12:16 AM I mean, it's basically a lathe bed in the end 21-Mar-20 12:18 AM if you move the dividing head separately from the rest you could probably get away with one of those hydraulic lifting carts 21-Mar-20 12:18 AM bit more functional in tight quarters 21-Mar-20 12:18 AM I have stairs to go up, 4 or 5 cement stairs 21-Mar-20 12:18 AM from the outside to front patio 21-Mar-20 12:18 AM yeah i just meant once you have it inside 21-Mar-20 12:18 AM for moving it around in your shop area 21-Mar-20 12:19 AM sure.. having it mobile is one thing, but I was just t hinking about making a simple stand out of dimensional lumber 21-Mar-20 12:19 AM 2x4 21-Mar-20 12:19 AM ea 2x4 as a stud as a carrying capacity of.. iirc.. 500lbs 21-Mar-20 12:19 AM so making temporary stands will hold up.. but it would be ideal to make it out of angle iron or similar 21-Mar-20 12:19 AM it's one of these: gotta get it before someone else does, sort of thing 21-Mar-20 12:19 AM it's been on the market place for a while, but I dont want to chance it, as it is exactly what I am looking for.. just the dividing head is available from other sellers, but for not all too much more this full package is available 21-Mar-20 12:21 AM yep i totally understand that situation 21-Mar-20 12:21 AM thankfully most of the stuff i buy like that is fairly small 21-Mar-20 12:21 AM these are all part of the inspection part of the manufacturing process I am getting into 21-Mar-20 12:21 AM hah, why would I need something so large to measure something so tiny?!? 21-Mar-20 12:23 AM inspecting tiny stuff is a weird exercise where you need more precise and more precise things the smaller you go...but those more precise things are often very large 21-Mar-20 12:25 AM I am planning on getting 4 items during this extended spring break.. 21-Mar-20 12:25 AM that toolmaker's microscope is paid for, just needs to be shipped 21-Mar-20 12:25 AM that divding head + table 21-Mar-20 12:25 AM bore inspector for microscope 21-Mar-20 12:25 AM and a XY+rotary table from an old jig borer that I will slap my milling head to, as my current trnaslation ont he combo lathe bed is a joke 21-Mar-20 12:28 AM sweet, just got an email from UPS and as i expected they are deemed critical infrastructure so deliveries continue despite the pandemic 21-Mar-20 12:28 AM yay 21-Mar-20 12:28 AM ...right? 21-Mar-20 12:28 AM yes very much so 21-Mar-20 12:29 AM yay 21-Mar-20 12:29 AM only change from normal seems that signing for packages will not be physical for awhile which is no big deal 21-Mar-20 12:31 AM the flippin pet store had a grid pattern setup so people would stay 6ft away from eachother 21-Mar-20 12:31 AM that kinda made me mad, honestly 21-Mar-20 12:31 AM I'm at that: c'mon people - stage 21-Mar-20 12:31 AM k, time to find a movie 21-Mar-20 07:58 AM Lol that’s hilarious 21-Mar-20 07:58 AM Everywhere should have a grid 21-Mar-20 08:00 AM My little brother is in Milan, they are enforcing max # of people per stores with queues outside 21-Mar-20 09:25 AM Honestly wish they would just have safedrop stuff set up, or at least the promise that "it will come" 21-Mar-20 09:38 AM for when school starts up again - we ar elimitted to 9 students in a classroom at anytime 21-Mar-20 09:57 AM wait what 21-Mar-20 09:57 AM your schools are starting again ? lol 21-Mar-20 09:57 AM our university is wondering if we'll be able to start again normally in september 21-Mar-20 09:57 AM goal 1: don't kill anyone goal 2: don't bankrupt anyone goal 3: don't destroy valuable research equipment/substances goal 4: get grades out for the current classes goal 5: get some research running again goal 6: summer research positions? goal 7: summer classes? goal 8: september classes 21-Mar-20 11:32 AM hooray! my data exists still 21-Mar-20 11:32 AM must have just had some boot info get corrupted 21-Mar-20 12:15 PM yeah they are opening, at least, that was the word yesterday 21-Mar-20 12:15 PM it's also for programs that require bench time 21-Mar-20 12:15 PM If you are faculty in the following departments: Watch Technology, Medical Assisting, Pharmacy Technology, Phlebotomy, EMT, Electronics, and Engineering Graphics. Your classes can begin on April 13 under the following conditions: 21-Mar-20 12:15 PM no more than 9 people in the room at any time - so first year students (which has a class of 10) will come in shifts 21-Mar-20 12:15 PM all other courses: If you are scheduled for a face to face or hybrid course, you will start your course online beginning 4/13 then move instruction back to campus on 4/27 (or possibly later depending on conditions). Be sure to communicate with your students about changes as they occur. If you plan to implement your course in this manner there is nothing further you need to do other than get ready for spring quarter. 21-Mar-20 12:15 PM the fact they have a grip on reality and want to continue is amazing 21-Mar-20 12:15 PM they also realize this college is for adults, not fresh out of highschool kids, and thus responsibility is a bit different, I think 21-Mar-20 12:15 PM not that we dont have kids under 21, but yeah 21-Mar-20 12:18 PM What country are you in? 21-Mar-20 12:18 PM I am the second youngest in our class, at 33 21-Mar-20 12:18 PM USA, this is in Washington, Seattle at that, which is somewhat of a hotzone 21-Mar-20 12:18 PM note, this may all change by the time class starts, but I am hopeful 21-Mar-20 02:08 PM lol 21-Mar-20 02:08 PM I don't like that 21-Mar-20 06:50 PM Playing an online trivia game with friends.... The question: name one of the first 10 elements on the periodic table. But if >1 people guess the same one, they lose. 21-Mar-20 06:50 PM Of course I have to say beryllium. 21-Mar-20 07:09 PM It’s kind of hard not to unsee that diner hazmat situation, so it’s fresh in my mind. 21-Mar-20 08:13 PM It’s kinda hard to forget. 21-Mar-20 11:02 PM Is there any known standard for rack-mounting machines? maybe something beyond the 19" standard - which it is easy enough to take up 16U by putting ears on a 3d printer and mounting it... but that's the idea I am going for 21-Mar-20 11:17 PM I also am interested in building a rack for my plasma chamber... I'm not even sure where to start, i know NIM and U are part of the lingo, but not much more 22-Mar-20 09:04 AM would it matter if you built it to any standard? or simply got rack mount rails and the 'ears' to bolt chassis onto? 22-Mar-20 09:34 AM You mean rack-mounting vacuum hardware? 22-Mar-20 09:34 AM The lab beside mine has two portable vacuum systems - one is their bakeout cart (scorll, turbo, valves + gauges, bellows, and then a heckton of variacs and extension cords) which they wheel around whenever one of their UHV systems has to be opened and then pumped 22-Mar-20 09:34 AM and the other is a primary pressure standard measurement device they're working on 22-Mar-20 09:34 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/Screen_Shot_2020-03-22_at_9.37.44_AM-66912.png 22-Mar-20 09:34 AM both are in 19" rack carts 22-Mar-20 09:34 AM but they're the double-long 19" racks that also have mounts on the sides for half-depth 19" rack componnets 22-Mar-20 09:34 AM and it's all pretty thick steel 22-Mar-20 09:34 AM So I don't really know what you would want beyond 19" rack, since you can basically fit something ~18"x36" in one. 22-Mar-20 09:48 AM wow...thats not great... just tried to order something from Amazon and my expected delivery date is April 21 22-Mar-20 10:35 AM yeah, prime is saying Saturday delivery right now 22-Mar-20 10:35 AM they ar ehiring 100k more people, likely in the delivery etc 22-Mar-20 10:35 AM @idmb that actually sounds neat/similar.. I sort of want drill presses in series that do one operation on a part, which is on a small pallet that gets carted to next station.. and I am figuring if I can simply put them in an industrial rack that already exists or how I can leverage such systems 22-Mar-20 10:37 AM that is with prime! 22-Mar-20 10:37 AM just want to get some drive enclosures but waiting a month for them is a bit much 22-Mar-20 10:37 AM my machining technique will use jigs and part location, so no leadscrews for XY placement (beyond the initial machine that makes the jigs) 22-Mar-20 10:37 AM yeah, I am looking at a chain fall and steerable machinery skates 22-Mar-20 10:37 AM for some of those things I have coming 22-Mar-20 10:58 AM hah, seller really want me to click buy.. so he can get started on the crate 22-Mar-20 10:58 AM for that optical dividing head + bed 22-Mar-20 10:58 AM there is nothing else that can really compare to it - no other options 22-Mar-20 10:58 AM it was more w/re to the weight of the item and how to get it inside the house, which is always a concern 22-Mar-20 11:41 AM I think 8020 is probably the closest thing to a standard for what you're wanting to do 22-Mar-20 12:00 PM I've thought of that before, but I wouldn't be constrained to a dimension at that point 22-Mar-20 12:00 PM which is almost what I am looking for, to design to a standard 22-Mar-20 12:00 PM but for any particular reason? not like I need servers next to a dirll press 22-Mar-20 12:00 PM I would like them to be CNC/automated, so there would be something there, but not a whole server 22-Mar-20 12:00 PM some type of conveyor system inbetween the stations would be nice.. 22-Mar-20 12:00 PM I think initially.. it will be one station, with basically a pez-dispensor style queue stack before and after 22-Mar-20 12:00 PM of parts to do the machining on 22-Mar-20 12:00 PM then manually swap out the jig + tool/cutter, and do itagain, until I make another station where then I can do two actions before swapping stuff out again 22-Mar-20 12:56 PM I mean, you can use 8020 to make something compatible with 19" rackmounts 22-Mar-20 12:56 PM That's very common 22-Mar-20 10:05 PM Hmm yeah my equipment is also 19" "at the ear" 22-Mar-20 10:05 PM 6 foot rack server with small wheels on Craigslist is $75-200 23-Mar-20 01:43 PM the framing isnt all that expensive.. I just have this grand idea of a perfectly clean machining room with cascading machines in nice enclosures.. not sure if there is anything wrong with current format of CNC machining centers though.. 23-Mar-20 07:34 PM Hardly the normal kind of vacuum pump on here but I came back to the little 12V pump I use for vacuum filtration to find it was dead. 23-Mar-20 07:34 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/image0-63FCC.jpg 23-Mar-20 07:34 PM Pulled it apart to find that 23-Mar-20 07:34 PM Can’t remember exactly what it was I put through it that must have been responsible but it rusted the metal and attacked the plastic 24-Mar-20 09:58 PM Looking at old topics... Raspberry Pi: an excellent platform for an EPICS IOC. 24-Mar-20 09:58 PM Especially for serial protocols. I’ve been working with asyn. It’s pretty powerful stuff. 24-Mar-20 09:58 PM I just finished a digital logic design course. We used an Altera FPGA. I think the Intel Quartus toolchain took 10 gig! 24-Mar-20 09:58 PM That’s funny considering that one of my projects was constructing a 4 bit CPU. So... 10 gigs of toolchain to simulate and synthesize something that is woeful compared to a Commodore 64.... 24-Mar-20 09:58 PM As for Pi, though, one of my shelter in place projects is to set up Volumio on a Pi that has a tube amp hat. Old school tunes.... 24-Mar-20 09:58 PM Now I’m taking a class on CPU architecture and assembly language programming on MIPS. 24-Mar-20 10:40 PM As for games during the shelter in place, I discovered Tabletop Simulator. This is seriously awesome. 24-Mar-20 10:40 PM I love board games, and game nights with friends are now socially irresponsible.... 24-Mar-20 10:52 PM Tabletop simulator! 24-Mar-20 11:03 PM Yeah! This past weekend, my gf and I played Betrayal at House on the Hill with a friend located in NY. 25-Mar-20 10:55 AM TTS is going to be available for the Tilt5 (Previously CastAR, by Jeri Elsworth), an augmented reality system 25-Mar-20 10:55 AM I have an old dev kit of the castar, and I should have a early bird Tilt5 coming in a few weeks 25-Mar-20 10:55 AM the initial game I was working on was a port of an old macintosh maze game called Scarab of Ra - pyrimid/egyptian themed 25-Mar-20 10:55 AM then I got interested in chemistry, and they basically went under 25-Mar-20 10:55 AM I havent touched deving games for years at this point though 25-Mar-20 10:55 AM plus, school 25-Mar-20 10:55 AM the next game on the list was a mini-game party thing, like fusionfrenzy or mario party, jack and the beanstalk theme, called Fee-Fie-Foe-Fum 25-Mar-20 10:55 AM zero progress beyond cconcepts and minigame ideas done for that 25-Mar-20 10:55 AM would be neat to look down into your table and see that you are in the clouds 25-Mar-20 11:06 AM Fun. I’ve considered getting VR. Problem is none of my phones were compatible with the headsets. And it didn’t seem worth buying a dedicated VR setup. I’d love to play Keep Talking And Nobody Explodes in the VR elevator mode.... 25-Mar-20 11:28 AM 1. How not to wire an apartment for electricity. 25-Mar-20 11:28 AM 2. How not to stick weld. 25-Mar-20 11:28 AM 3. How not to S.T.A.L.K.E.R. 25-Mar-20 11:28 AM https://youtu.be/h7NFySg1KrA 25-Mar-20 11:28 AM "instead of welding mask, I have pliers and hand" 25-Mar-20 11:33 AM yeah, that channel hasn't shown good practice with... anything 25-Mar-20 11:39 AM I just about fell over when I watched the guys trying to stick weld without blinding themselves, then their experienced welder causing a short and running away while loudly exclaiming a Russian word that I’m guessing server policies prohibit me from repeating here. Uhhh... no. Just... no. 25-Mar-20 11:42 AM yeah I really don't like what they're doing there 25-Mar-20 11:42 AM have you been horrified by their xray video yet, @rdpierce ? 25-Mar-20 11:42 AM it's Idiots like this causing further lockdown in the zone 25-Mar-20 11:43 AM Oh yeah. 25-Mar-20 11:43 AM i showed a friend who works in radiology that one and he said it made him feel physically ill watching it 25-Mar-20 11:44 AM I don’t want to think how much dose they were getting from that X-ray tube.... 25-Mar-20 11:44 AM hopefully enough to keep them from reproducing but not so much that any neighbors were in danger 25-Mar-20 11:45 AM They’ve done some highly irresponsible things with magnetrons, and.... flying a kite in a lightning storm? 25-Mar-20 11:45 AM I haven’t been to the Zone since 2016. How much additional lockdown has been happening? 25-Mar-20 11:49 AM I don't know, but I'd expect a lot 25-Mar-20 11:49 AM after all the fans of the series... 25-Mar-20 11:49 AM I know the hospital basement had a dump truck full of sand dumped in the main stairwell, however there’s still plenty of ways in. That was between 2015 and 2016. 25-Mar-20 11:49 AM Also I heard someone got killed falling from Duga in late 2016? And they cut the bottoms of the ladders off. 25-Mar-20 11:49 AM This was all pre-HBO. 25-Mar-20 11:51 AM Is Duga the radar installation? 25-Mar-20 11:51 AM Yes. 25-Mar-20 11:54 AM It's such a weird coincidence that this thing got included in the whole mess 25-Mar-20 11:57 AM Giga, is Deutschland on lockdown? I'm not really aware what the rest of the world is up to beyond the uK and a little of italy 25-Mar-20 11:57 AM oi, my leitz toolmaker's microscope may arrive tomorrow morning? 25-Mar-20 11:59 AM Some artist/idiot produced an art film/“documentary” that suggests that Duga didn’t really work for its intended purpose of detecting ICBMs, and the people responsible intentionally caused the Chernobyl meltdown so they wouldn’t be held responsible for wasting Soviet money. 25-Mar-20 11:59 AM Obviously.... 25-Mar-20 12:00 PM @Noxz partial lockdown Most stores are closed and there are strict rules with whom you may go out, but if you're alone you can go out whenever or whereever you want to 25-Mar-20 12:00 PM https://www.imdb.com/title/tt4082596/ 25-Mar-20 12:00 PM I actually have a date for when school will start back up, face to face (but limitted).. mid april 25-Mar-20 12:01 PM I mean with all the conspiracy theories around HAARP would be surprising that something like that didn't exist for the Soviet side 25-Mar-20 12:01 PM school and uni etc is all canceled 25-Mar-20 12:01 PM we will be limitted to 9 people in a classroom at any time 25-Mar-20 12:01 PM "until further notice" 25-Mar-20 12:01 PM and this was specifically for courses that require bench time 25-Mar-20 12:02 PM @Noxz that microscope looks beautiful. We had a Nikon optical comparator at the makerspace and some people irrationally junked it. 25-Mar-20 12:02 PM argh 25-Mar-20 12:03 PM So classes for you are in WA? 25-Mar-20 12:03 PM I am sort of eyeing a Leitz folded mirror autocollimator, without the mirror.. I think a digital one would actually be the way to go though, and/or one of Sams's laser itnerferrometer kits 25-Mar-20 12:03 PM Yes 25-Mar-20 12:03 PM Seattle 25-Mar-20 12:03 PM last word we got was good at least, but that was a week ago? 25-Mar-20 12:04 PM Please let me know if it happens. I’m happy to ship my Polimaster watch to you when you have access to a quartz tester. 25-Mar-20 12:04 PM stocks are doing well enough, in anticipation for the releif package or whatever 25-Mar-20 12:04 PM ahh, yes, will let you know if dates change, but April 13th is our tentative start date 25-Mar-20 12:04 PM I actually have some quartz oil here, but I would prefer to do the testing at school 25-Mar-20 12:04 PM I suppose I could hook up my oscope and get near the same readings, but it's a neat system overall 25-Mar-20 12:04 PM a quartz clock IC is actually the only semiconductor on the lis tthat I want to make myself 25-Mar-20 12:04 PM home-made, american made, quartz watch 25-Mar-20 12:04 PM quartz can still be very... haute 25-Mar-20 12:04 PM heck, Rolex has quartz 25-Mar-20 12:08 PM I was drooling over one of CuriousMarc’s recent videos. 25-Mar-20 12:08 PM https://youtu.be/eOti3kKWX-c 25-Mar-20 12:09 PM OOoo, let's give that a watch! 25-Mar-20 12:09 PM I would love an automic clock at home 25-Mar-20 12:09 PM as reference 25-Mar-20 12:09 PM video is really cool 25-Mar-20 12:10 PM I’ve been eyeing a lot of the cesium clocks that come up on eBay. 25-Mar-20 12:10 PM these quartz timing machines just use a temperature compensated one, iirc 25-Mar-20 12:10 PM The tubes are usually dead. 25-Mar-20 12:10 PM And replacements are ridiculously expensive. 25-Mar-20 12:10 PM Did you see the stuff about the guy who took a cesium clock on a vacation with his kids to Mt. Ranier to demonstrate general relativity? 25-Mar-20 12:10 PM http://www.leapsecond.com/great2005/ 25-Mar-20 12:10 PM He just casually mentions that the master clock for his home is a hydrogen maser. 25-Mar-20 12:14 PM hah, neat 25-Mar-20 12:34 PM what a cool dad 25-Mar-20 12:34 PM also that video owns 25-Mar-20 12:34 PM and got me wondering about how perilous it'd be to refill a cesium beam tube... 25-Mar-20 12:43 PM just got some containers to repack my glassware.. would anyone be interested in photos/an inventory of what I have? I think I have pics when I first ordered the stuff which is just the same 25-Mar-20 12:46 PM Those clock generators are pretty awesome. I have a Rubidium standard module on my bench at home. Never bothered powering it up though. If I get some days off from this thing I might give it a try, but so far I have been slammed with orders. We make controls for water filtration, supply and waste management and industrial process and all of our customers called and requested that we stay open. So here we are. Reduced staff and running as fast as we can. I have just accepted the fact that we will probably get this thing if it spreads locally which fortunately it does not appear to have done so here in Fresno yet. Only 19 cases and mostly from known sources. 25-Mar-20 12:48 PM we had like 20 more deaths in this county over night, or something 25-Mar-20 12:48 PM Wunderground now has a corona map and tells these stats 25-Mar-20 12:57 PM There's this map too, with country and state and regional breakdown, as well as infection graph https://coronavirus.jhu.edu/map.html 25-Mar-20 01:08 PM Our summer term has already been announced as being strictly online-only until the end of June 25-Mar-20 02:24 PM I wish Duga 2 was not so dangerous 25-Mar-20 02:24 PM Would love to klimb in the middle and then hook up to the balanced feedline some large alligator clips going to a balun and antenna tuner 25-Mar-20 02:24 PM and work some QSO's on shortwave. 25-Mar-20 02:40 PM I have dusted off my radios cause there is little else to do other than watch stuff on Roku 25-Mar-20 03:32 PM I am repacking my glassware.. I sometimes forget how much junk I have 25-Mar-20 03:32 PM found my 4 port shlenk manifold 25-Mar-20 03:32 PM amongst every little thing else, mostly still bubble wrapped from last move 25-Mar-20 03:32 PM I got under-the-bed containers to store everything in, instead of random sized cardboard boxes 25-Mar-20 03:32 PM so - quite a bit of spring cleaning going on here 25-Mar-20 03:42 PM Darn, what’d you need that for? 25-Mar-20 03:44 PM I'm a chemistry enthusiast 25-Mar-20 03:44 PM I use shlenk manifolds to cycle between vacuum and intert gas 25-Mar-20 03:44 PM so you purge out all the air/oxygen 25-Mar-20 03:44 PM and then keep it out with positive pressure of inert gas - sometimes 25-Mar-20 03:44 PM I’m familiar with them. Just wondering what it was specifically being used for 25-Mar-20 03:45 PM I was dealing with some stuff that was oxidizing in air 25-Mar-20 03:45 PM Ah cool 25-Mar-20 03:45 PM salted phenols like to do that 25-Mar-20 03:45 PM also.. really lame, I just had to reboot my computer 25-Mar-20 03:45 PM first time in months 25-Mar-20 03:47 PM Oh wonderful 25-Mar-20 03:47 PM my chemistry setup was pretty elaborate 25-Mar-20 03:47 PM for a first go at it 25-Mar-20 03:47 PM 6ftx5ft WxH fume hood, etc 25-Mar-20 03:47 PM version 2 upon moving and seting up my workshop will be quite better 25-Mar-20 03:51 PM That’s properly impressive 25-Mar-20 03:51 PM some of the build process.. https://goo.gl/photos/MndYWDWKzWdrgeJc8 25-Mar-20 03:51 PM bafle type, so fumes get pulled back and down. not up towards your face 25-Mar-20 03:52 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/image0-F9C5E.jpg 25-Mar-20 03:52 PM Mine is much smaller and a lot more crowded 25-Mar-20 03:53 PM hah, Ihave some crowded situations.. 25-Mar-20 03:53 PM I’m quickly running out of space in that room 25-Mar-20 03:54 PM good ol' DiChloroMethane distilling from the can... 25-Mar-20 03:54 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/DSC_1981-19B7B.jpg 25-Mar-20 03:54 PM you can see like a dozen storage jars to the right 25-Mar-20 03:54 PM Inert transfer.. the reason for the schlenk 25-Mar-20 03:54 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/DSC_2105-C513F.jpg 25-Mar-20 03:55 PM Oh my oh my 25-Mar-20 03:55 PM yarrr 25-Mar-20 03:55 PM And your poor scale 25-Mar-20 03:55 PM oh, that one lives in the fumehood 25-Mar-20 03:55 PM I have a much better one that lives outside 25-Mar-20 03:55 PM has RS232, etc 25-Mar-20 03:55 PM I half made an interface at some point 25-Mar-20 03:56 PM I got lucky and found the scale that’s sitting next to my hood in an ewaste bin a few years ago 25-Mar-20 03:56 PM good scale 25-Mar-20 03:56 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/DSC_2157-0470D.jpg 25-Mar-20 03:57 PM What’s that in the flask? 25-Mar-20 03:57 PM schlenk manifold in picture this time 25-Mar-20 03:57 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/DSC_2218-9DD3A.jpg 25-Mar-20 03:57 PM honestly, the 4 port was overkill 25-Mar-20 03:58 PM That’s a darn impressive setup if I haven’t said so already 25-Mar-20 03:58 PM and when I moved, this was all packed up 25-Mar-20 03:58 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/DSC_2373-ADDCE.jpg 25-Mar-20 03:58 PM and nothing really came out of thos eboxes until recently, but just to get rid of weird box shapes 25-Mar-20 03:58 PM RS232 to a ARM computer with wifi, where I am reading the output on my phone/ssh terminal - which is what is being weighed.. 25-Mar-20 03:58 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/DSC_1516-01759.jpg 25-Mar-20 03:58 PM that was a cool project 25-Mar-20 04:01 PM I ought to check out what the interface for my scale is 25-Mar-20 04:02 PM Al(OiPr)3 being vacuum distilled over - with essentially a short air condensor - no need for coolant 25-Mar-20 04:02 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/DSC_1335-95A64.jpg 25-Mar-20 04:02 PM I’m gearing up for a synthesis of indigo from toluene. 25-Mar-20 04:02 PM Real excited to figure out the oxidation step 25-Mar-20 04:04 PM crazy setup.. fractional distillation with... acidic? traps 25-Mar-20 04:04 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/DSC_1113-7E8EA.jpg 25-Mar-20 04:04 PM found some iodine synth subliming it.. this was the old method, I have a better newer version in the works.. 25-Mar-20 04:04 PM photos arent downloding right, hrm 25-Mar-20 04:06 PM Was that what was going on there? 25-Mar-20 04:07 PM no, that last photo was some multi separation thing 25-Mar-20 04:07 PM Ah 25-Mar-20 04:07 PM it was kinda stupid in the end, wasnt how I wanted it, but atleast I learned the setup 25-Mar-20 04:07 PM and because photos is being weird, a link to the iodine synth.. https://photos.app.goo.gl/V7gFd4JNK6MpEKyf9 25-Mar-20 04:07 PM it was iodine purification 25-Mar-20 04:07 PM basically conc sulfuric acid+ dirty iodine with a cold flask or wash flat up top 25-Mar-20 04:09 PM What were you starting with, just impure iodine? 25-Mar-20 04:09 PM I wish I had a 'cold finder' 25-Mar-20 04:09 PM NaI ? 25-Mar-20 04:09 PM I think 25-Mar-20 04:09 PM or KI 25-Mar-20 04:09 PM Ah 25-Mar-20 04:09 PM Let me recall what I used 25-Mar-20 04:09 PM Something somewhat accessible 25-Mar-20 04:09 PM hydrogen peroxide? 25-Mar-20 04:10 PM Hm? 25-Mar-20 04:10 PM to reduce/oxidize 25-Mar-20 04:10 PM H2O2 + NaI -> I2 (+NaOH, aq) 25-Mar-20 04:10 PM I am trying to think if I did more though.. I think I have a lab book of that around here somewhere 25-Mar-20 04:10 PM but yeah, then purified with conc sulfuric 25-Mar-20 04:10 PM fume hood necessary for that stuff 25-Mar-20 04:10 PM (iodine) 25-Mar-20 04:11 PM That’s cool, and I’d certainly agree 25-Mar-20 04:11 PM I’ve been happy for mine just working with copper nitrate solution 25-Mar-20 04:11 PM I have little fondness for NO2 in my nose 25-Mar-20 04:13 PM the blower fan I have on that (which is after actual labconco iirc, fume hood filters) is 1100 sq ft/..min? fan 25-Mar-20 04:13 PM anywhere on the baffle, if the polycarb sashes are up or down, it has enough strength to hold up a paper towel 25-Mar-20 04:15 PM Mine is a little less powerful but the sash is fixed normally 25-Mar-20 04:16 PM there are many things I would change for round 2 25-Mar-20 04:16 PM When I build my new place I am going to have a chem lab area. 25-Mar-20 04:16 PM mainly, I would make the whole thing taller, if I could, because I slammed my head into the top wood piece soooooooooo many times 25-Mar-20 04:17 PM I am building a home in a residential air park and I have to build a hangar, but it’s really just going to be a big shop for all of my stuff 25-Mar-20 04:17 PM hah 25-Mar-20 04:17 PM HOA requires a hanger? 25-Mar-20 04:19 PM that's a great HOA requirement 25-Mar-20 04:19 PM I wonder if you could sneak that into a condo strata to prove nobody reads them 25-Mar-20 04:20 PM ahhhh.... I found what I was using Ioidine for... to kickstart grignards 25-Mar-20 04:20 PM but, was not necessary in the end.. helps, but yeah 25-Mar-20 04:20 PM I am sure sodium per carbonate (oxy-clean) would create H2O2 in situ and give you I2 25-Mar-20 04:22 PM HOA requires airplane storage means. Which pretty much just means hangar. Some of the older homes have a huge car port but the ones from the last 40 years pretty much just have hangars 25-Mar-20 04:22 PM I got some for chemistry pruposes, but havent tried it's ability at anything yet 25-Mar-20 04:22 PM that's cool.. I want a hanger 25-Mar-20 04:24 PM Wait are you living in one of those air park home? 25-Mar-20 04:24 PM Have yet to start construction though. This virus won’t help either. As far as my current chemistry situation I can’t do anything with higher power chemicals or playing because I have no hood 25-Mar-20 04:24 PM the place I did my undergrad at bought a hangar kit and built their indoor field / track / gym in a hangar. pretty cool 25-Mar-20 04:24 PM I own a lot in one and am planing on building a regular home with a hangar in front 25-Mar-20 04:25 PM neat 25-Mar-20 04:26 PM I need it for my machines and car shop. 25-Mar-20 04:26 PM priorities 25-Mar-20 04:26 PM Honestly I feel like the best living combo is small home and big hangar/barn 25-Mar-20 04:27 PM Do you live in an area where there are country lots? 25-Mar-20 04:28 PM Old European city right now so basically as far from that as you can imagine 25-Mar-20 04:28 PM well apart from tiny living space 25-Mar-20 04:29 PM Oh. I live in a suburban area with lots of rural surrounding it 25-Mar-20 04:29 PM Early everything around here is from the last century so it’s pretty spread out. 25-Mar-20 04:29 PM Nearly. Not early 25-Mar-20 05:17 PM I have a hangar. 25-Mar-20 05:17 PM But not attached to my residence. 25-Mar-20 05:58 PM mostly repacked all glassware.. these worked well! 25-Mar-20 05:58 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/DSC_1107-A80A1.jpg 25-Mar-20 05:58 PM @Addison-110m check out this gem, medium fritt inert filter 25-Mar-20 05:58 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/DSC_1105-72C05.jpg 25-Mar-20 05:58 PM not sure I ever used it... looks much too clean 25-Mar-20 06:06 PM Oh shiny 25-Mar-20 06:19 PM And the hangar has a plane in it. Not a workshop. 26-Mar-20 09:10 AM Can we get some more special emotes? 26-Mar-20 09:10 AM How does that work? 26-Mar-20 09:33 AM find suitable images, poke an admin 26-Mar-20 09:33 AM we get 50 custom emoji slots on this server 26-Mar-20 09:51 AM upvoting should be equivilent of pulling a good vacuum (like an analog gauge or something, going to the green?) 26-Mar-20 10:35 AM animated stickers are a whole different story 26-Mar-20 10:35 AM need a minimum boos level iirc 26-Mar-20 10:59 AM so if I make a 32x32 image 26-Mar-20 10:59 AM it can be done? 26-Mar-20 10:59 AM boots up solidworks 26-Mar-20 11:11 AM up to 512x512 26-Mar-20 11:12 AM when I googled it it said you could upload higher res but it gets rescaled 26-Mar-20 11:12 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/565530648362745866-458C2.png 26-Mar-20 11:12 AM huh 26-Mar-20 11:12 AM that's 128x71 26-Mar-20 11:12 AM I made this but now I know I can do better 26-Mar-20 11:12 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/CFCross-E77B9.png 26-Mar-20 11:12 AM ew the white 26-Mar-20 11:21 AM looks like a pipe from super mario 26-Mar-20 11:22 AM I colour coded my solidworks based on stuff we already had and stuff we had to buy 26-Mar-20 11:44 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/Flangeopus_-_small-16348.png 26-Mar-20 11:44 AM that was 512x, this is 128x 26-Mar-20 11:44 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/Flangeopus_-_128x-D6245.png 26-Mar-20 11:44 AM 64x 26-Mar-20 11:44 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/Flangeopus_-_64x-0F8BC.png 26-Mar-20 11:44 AM 32x 26-Mar-20 11:44 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/Flangeopus_-_32x-D9E6C.png 26-Mar-20 11:44 AM Oh I see I missed a bit 26-Mar-20 11:44 AM this is the best 26-Mar-20 11:44 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/Flangeopus_-_512x_-_final-530A4.png 26-Mar-20 12:03 PM next one 26-Mar-20 12:03 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/Coldhead-128-118E8.png 26-Mar-20 12:03 PM (I'm real bored of working from home) 26-Mar-20 12:19 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/Edwards40_-_64x-A2AED.png 26-Mar-20 12:19 PM while they look nice you gotta thng about in which situations you'd use those as a reaction to something 26-Mar-20 12:20 PM cold head - SOMETHING COOL 26-Mar-20 12:20 PM flangopus - wacky 26-Mar-20 12:20 PM edwards 40 - sucks 26-Mar-20 12:20 PM the options are limitless 26-Mar-20 01:21 PM we need a beryllium cringe emoji 26-Mar-20 01:21 PM reminds me of when me and adam were spinning up this server and spitballing names 26-Mar-20 01:21 PM and i came up with 'Meme Free Path' 26-Mar-20 01:21 PM but we went with the conservative option 26-Mar-20 01:21 PM im also entirely okay with just (topical) nonsense emojis 26-Mar-20 01:21 PM what's the little green cross thing? 26-Mar-20 01:21 PM annoyingly the 512x512 is too big in filesize 26-Mar-20 01:21 PM but, meanwhile, 26-Mar-20 01:21 PM ln2 corncob pipe 26-Mar-20 01:21 PM (:names: for emojis are also helpful) 26-Mar-20 01:29 PM the green cross thing is a CF8 cross, don't use that one 26-Mar-20 01:29 PM ohh 26-Mar-20 01:29 PM that was literally just a screenshot of solidworks set to 32x32 26-Mar-20 01:29 PM can you read the 40 on that? 26-Mar-20 01:29 PM I can't 26-Mar-20 01:30 PM nop 26-Mar-20 01:30 PM discord emojums aren't very hidpi friendly 26-Mar-20 01:30 PM the cold head looks fine 26-Mar-20 01:30 PM when used standalone rather than a reaction 26-Mar-20 01:31 PM i can swap images too if they're not to your liking 26-Mar-20 01:31 PM perhaps an alcatel or other rotary vane would work better 26-Mar-20 01:31 PM I find the 40 iconic but the text is just a little gross 26-Mar-20 01:31 PM I like that tho 26-Mar-20 01:32 PM maybe a lup-lup-luppy old welch duoseal 26-Mar-20 01:32 PM OH we need a gnarled turbopump 26-Mar-20 01:32 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/Two_moving_spirals_scroll_pump-8C9F3.png 26-Mar-20 01:32 PM for reactions my mind always goes to expensive disasters 26-Mar-20 01:33 PM I thought a water-cooled oil diffusion pump would also be pretty easily identifiable 26-Mar-20 01:33 PM even if small 26-Mar-20 01:33 PM yeah! 26-Mar-20 01:33 PM metal beehives 26-Mar-20 01:33 PM I'm just tired of blackholing everything 26-Mar-20 01:33 PM I assume you can replace the emotes in the future / aren't limited to 500 uploads total 26-Mar-20 01:34 PM yeh i can delete/edit stuff 26-Mar-20 01:34 PM so, like, i'm all for going nuts with it 26-Mar-20 01:34 PM also i think 50 is the max unless some people with discord nitro boost us 26-Mar-20 01:34 PM still tho 26-Mar-20 01:36 PM then we get animated ones and can animate a turbo exploding 26-Mar-20 01:36 PM i don't think i've ever seen a turbo explode 26-Mar-20 01:37 PM I think a simple viewport would also make a nice emote 26-Mar-20 01:37 PM like that but CF 26-Mar-20 01:37 PM and no handle 26-Mar-20 01:37 PM oh and the inanimate carbon rod 26-Mar-20 01:37 PM the classic 26-Mar-20 01:37 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/InanimateCarbonRod-DC511.png 26-Mar-20 01:43 PM ooh, uranium cubes 26-Mar-20 01:43 PM slotin hemispheres 26-Mar-20 01:43 PM We Need More Novel Geometries 26-Mar-20 01:43 PM excellent 26-Mar-20 01:43 PM green backslash 26-Mar-20 01:46 PM I don't see a viewport photo I like so I guess I'll either figure out a CAD model or take one myself... when the university opens again 26-Mar-20 01:46 PM @funranium hey you're a safety signage connoisseur, got any designs that'd work in tiny discord emoji format? 26-Mar-20 01:46 PM come be unproductive with us 26-Mar-20 01:46 PM i have some 2.75" viewports i haven't gotten around to installing on my chamber yet, i could get a little one 26-Mar-20 01:47 PM I'm thinking a photo perpendicular to it with a copper gasket on it should make it more identifiable 26-Mar-20 01:47 PM also probably gonna replace my 6" viewport with that chevron mcp 26-Mar-20 01:47 PM that'd make a good'un 26-Mar-20 01:48 PM so it'll be glassy in the middle with a ring of copper then a ring of steel with bolt holes 26-Mar-20 01:48 PM i could do a terrible sin and put the bolts in backwards with the gasket still in there 26-Mar-20 01:48 PM drive like the three people who notice it absolutely nuts 26-Mar-20 01:49 PM we have some flanges where some bolts go in one way and others go in the other 26-Mar-20 01:49 PM just cause of where stuff conflicts 26-Mar-20 01:49 PM yeah i've had to do that around my turbo 26-Mar-20 01:49 PM ext250's a tight squeeze with duniway plate nuts 26-Mar-20 01:51 PM KF clamp would also make a good one 26-Mar-20 01:51 PM or a centering ring 26-Mar-20 01:52 PM pile of used CF gaskets.. 26-Mar-20 01:52 PM man now i need a greenscreen 26-Mar-20 01:52 PM got a colour printer? 26-Mar-20 01:55 PM OH WAIT 26-Mar-20 01:55 PM genderqueer pride flag has a green stripe 26-Mar-20 01:55 PM heck yes 26-Mar-20 01:55 PM guess i know what i'm doing later tonight 26-Mar-20 08:09 PM So what is the black hole emoji supposed to be used for anyway? 26-Mar-20 08:46 PM I use it whenever I see something that just makes me think "the void" 27-Mar-20 08:44 AM this looks like a checkmark, or a tobacco pipe 27-Mar-20 08:44 AM this one looks like pickle Rick 27-Mar-20 08:44 AM Ok the color checks out with original source, so I'm good with that one 27-Mar-20 08:44 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/Screenshot_20200327-084644-DEC13.png 27-Mar-20 09:10 AM it is from the original source lol 27-Mar-20 09:10 AM I can read the edwards 40 on my 1280x800 macbook screen 27-Mar-20 09:10 AM but not on any of my larger monitors with higher res 27-Mar-20 09:10 AM even when I adjust the scaling 27-Mar-20 09:10 AM kinda weird 27-Mar-20 09:10 AM I could flip the cold head 27-Mar-20 09:10 AM then it would be more like a check mark 27-Mar-20 10:31 AM Good ol’ Inanimate Carbon Rod. 27-Mar-20 10:32 AM In rod we trust 27-Mar-20 11:51 AM Inanimate carbon rod will save us all every time. Speaking of which. Has anybody given any thought to if COVID 19 is destroyed in a vacuum? Perhaps all of the disposable masks and gowns are not as disposable and they are held to believe. Like an atmospheric autoclave of sorts. 27-Mar-20 11:53 AM You'd probably screw up the filters? 27-Mar-20 12:08 PM All mask filters are is spun poly fibers mashed together. N95 masks are actually pretty weak filters. The blue surgical ones have copper oxide and citric acid in them to really kill things. 27-Mar-20 12:15 PM Given that freeze drying is a big industry for biologicals, and given that virii have much less junk inside them vs a cell, I'd say no vacuum wouldn't destroy them 27-Mar-20 12:15 PM (lyophilization is the term for biologics industry freeze drying) 27-Mar-20 12:50 PM If a tardigrade can survive in a vacuum, I’d think a virus could. 27-Mar-20 12:50 PM Now radiation, on the other hand.... couldn’t this stuff be hit with Co-60? 27-Mar-20 12:51 PM There are few papers from the US army in the 60's about nuking biological weapon places 27-Mar-20 12:51 PM apparently it is as stupid as it sounds... super small radius and super high risk of just dispersing it further 27-Mar-20 12:51 PM You need really high doses to kill things like that 27-Mar-20 12:51 PM I was actually supposed to do some Co-60 electronics radiation testing this week... 27-Mar-20 12:59 PM Anyone seen or read The Andromeda Strain? 27-Mar-20 12:59 PM they nuke the virus and it absorbs it 27-Mar-20 01:12 PM I think I saw the movie(s) 27-Mar-20 01:12 PM Is that the silicate based one? 27-Mar-20 01:14 PM idr 27-Mar-20 01:19 PM I watched Contagion and WWZ in the past month or so 27-Mar-20 01:20 PM can't wait for contagion 2 27-Mar-20 01:20 PM And there was another from the 80s or 90s woth Morgan Freeman I think 27-Mar-20 01:20 PM where they just show that no lessons were learned from contagion 1 27-Mar-20 01:20 PM That's just gonna be home video from this year 27-Mar-20 01:21 PM ooh a cloverfield-style contagion would be excellent 27-Mar-20 01:22 PM If you haven't read the WWZ book you really should 27-Mar-20 01:22 PM Very different from the movie. It's like hard sci-fi zombie book 27-Mar-20 01:22 PM they even have a full cast audiobook 27-Mar-20 02:52 PM The audiobook is effectively one of the best radio plays I’ve heard in a long time. 27-Mar-20 02:57 PM toolmaker's microscope, now inside! 27-Mar-20 02:57 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/DSC_1113-A60D0.jpg 27-Mar-20 02:57 PM time to figure out if anything is wrong with the thing! 27-Mar-20 02:57 PM I hope the optics are all in check 27-Mar-20 03:24 PM initially glance says optics are okay.. I can shine a flashlight and see through eyepiece 27-Mar-20 03:24 PM there is also a timer shutter for the optical comparator part, from on, to 1s, down to 128/s 27-Mar-20 03:24 PM I presume for photography 27-Mar-20 03:24 PM german engineering 27-Mar-20 03:24 PM this is the first machine I got that isnt caked on with grease.. I think I can take my gloves off 27-Mar-20 04:07 PM I usually throw my smart phone under microscope optics and look at the pixels 27-Mar-20 04:14 PM ^ when I'm trying out new macro tubes / lenses / whatever on my camera, I use my laptop screen to get an idea of the depth of field / focusing range 27-Mar-20 04:14 PM backlight things with small resolvable details? YES PLEASE 27-Mar-20 04:24 PM @funranium it isn't often that I find someone who appreciates radio plays. There's a local theatre company that hosts an annual competition for horror plays, performed live on stage, with the foley effects also live on stage. It's a lot of fun. 27-Mar-20 05:13 PM wow, I was able to match about 95% of the screws that were in the bin to the right location.... I think... 27-Mar-20 05:13 PM there's still a few remaining, and a missing/unmatched grub screw that I will head to the hardware store (if they are open) here shortly to try and match up (or turn one on the lathe? I have brass rod in it right now) 27-Mar-20 05:13 PM havent viewed anything yet, need to figure out the 'hump' in the back - I think it's a giant lightbulb, need to get at it a bit better 27-Mar-20 05:13 PM but, pretty confident in it all 27-Mar-20 06:45 PM locale Ace hardware store open, but they had nothing that would have worked.. may be like a M2.5 grub screw? I just may re-tap it for M3 as those are much easier to acquire (I could make the correct one, but yeah) 27-Mar-20 08:12 PM Phone Pixels work at all 3 objectives, 10x, 20x, and 30x 27-Mar-20 08:12 PM the X direction knob does not seem to work.. Y does, as does the rotary table 27-Mar-20 11:13 PM McMaster? You can get darn near anything from them. 27-Mar-20 11:13 PM If McMaster isn't an essential business, something is wrong with the world. 27-Mar-20 11:13 PM I am spoiled. In Chicago, standard UPS ground shipping from them has often been SAME DAY for me if I place the order in the morning. They have to have some really special deal with UPS. 27-Mar-20 11:49 PM Same even in Vancouver. I have frequently picked ground shipping and had it same-day from ontario 28-Mar-20 11:01 AM no need to mcmaster if I have a lathe and/or the taps to make it work 28-Mar-20 11:01 AM sure, I am altering a very original piece of equipment, but not in any bad way, it's just a grub screw 28-Mar-20 11:01 AM keeping it metric, just bumping it up one size 28-Mar-20 10:28 PM fixed the X travel, not sure what was entirely wrong with it, but basically took the table off, cleaned up a few things, and simply paid more attention of what was going on 28-Mar-20 10:28 PM still ??? on one of the knobs.. kinda saw what it was moving, but zero idea on the actual output, maybe with the optics or similar - will wait for the german manual before I do much more to it 28-Mar-20 10:28 PM scales are Heidenhain LID310 28-Mar-20 10:28 PM the one old catalog I found states the 311 is for measuring machines.. so that sounds right 28-Mar-20 10:28 PM 10micron grating, sinusoidal output 28-Mar-20 10:28 PM I believe it is the 0.5micron accuracy one 28-Mar-20 11:56 PM Oh gosh. I had to deal with Heidenhain sinusoidal encoders on an ancient CNC version of a Bridgeport mill. That was a nightmare. The encoders uses small incandescent bulbs, which really love to burn out, and replacing them involves a major alignment effort. Also, one of the encoders was hacked by someone who put it together with the wrong kind of screw. (It was designed with flat head countersunk screws that aligned the parts.) This changed the optical relationship between the bulbs, optical scale, and photocells. 29-Mar-20 11:17 AM the original DRO for it was some 16bit HP box.. cant see mcuh more from thumbnail pic of the manual which should be coming at some point here 29-Mar-20 10:34 PM https://twitter.com/TubeTimeUS/status/1244407519927078912?s=20 29-Mar-20 10:47 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/EUOGU3AUEAAM4LG-DC523.jpg 30-Mar-20 09:37 AM @nmz787 have you seen tools for mechanical integration? 30-Mar-20 09:39 AM https://pbs.twimg.com/media/EUTvtPAXQAcP0fU?format=jpg&name=orig 30-Mar-20 09:40 AM Ouch 30-Mar-20 09:48 AM table of contents in my grandfather's assignment from 1937 on mechanical integration 30-Mar-20 09:48 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_0988_copy-E7979.jpeg 30-Mar-20 09:48 AM they basically had a bunch of pretty simple mechanical tools that could do a bunch of common forms of integral 30-Mar-20 10:14 AM I present the worst scan possible, but you can still see some of the ideas. Thanks mom! 30-Mar-20 10:14 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/Mechanical_Integration-D2331.pdf 30-Mar-20 11:36 AM @idmb nope haven't looked into that stuff, at least not more than my automotive's odometer 30-Mar-20 11:57 AM Kind of a long shot, but is anyone here a semiconductor tool owner? 30-Mar-20 11:58 AM Like at work or at home? 30-Mar-20 11:58 AM I'm not at work, but am at home... 30-Mar-20 11:58 AM I know tool owners at work tho 30-Mar-20 12:02 PM Work, I was just kind of curious about what it's like because being an intel tool owner is a pretty likely path for me post PhD, we have a big pipeline there, but I also don't think I want to spend my entire life in the semiconductor industry, and I know I don't want to spend my entire life as a tool owner. 30-Mar-20 12:03 PM I work in analog validation at Intel 30-Mar-20 12:03 PM You'll probably be on call and work long hours, but have long weekends as a tool owner 30-Mar-20 12:03 PM Like 10-12 hour days 4 days a week, I think 30-Mar-20 12:03 PM It's a great place if you know how to drive your own career and throttle yourself against overwork and b.s. management fights 30-Mar-20 12:07 PM Yeah, I know that part. I guess my big question is A. Roughly how old are the tool owners you know? 30s? 40s? Even older? B. How realistic is it to do something else after say, 5 years. Because I'm pretty okay with basically doing another PhD except being paid like 6x as much, but I don't think I want those hours for 30 years either 30-Mar-20 12:07 PM Good to know that last part though 30-Mar-20 12:07 PM Tools owners I've know have started with bachelor's and worked their way up through a few fab jobs 30-Mar-20 12:07 PM So 20s to 30s, 40s you're probably a project/lab lead or technical manager 30-Mar-20 12:07 PM Unless you really love tools 30-Mar-20 12:07 PM Pretty easy to do something else after 5 years... Or 2 even 30-Mar-20 12:07 PM Especially with a PhD 30-Mar-20 12:07 PM Internal transfers are all that's happening right now with hiring freeze due to virus 30-Mar-20 12:07 PM So like, if you had half a decent resume for programming in Python and knew about 'analog' you could apply to my software team (for example) and be considered 30-Mar-20 12:10 PM escaping to industry this quick into a recession, eh? 30-Mar-20 12:11 PM But like, there's 100k people here, tons of niches to fill 30-Mar-20 12:11 PM Heh , i just got promoted a week ago 30-Mar-20 12:11 PM Recession isn't obvious to my bank account, stocks are another question but they should recover 30-Mar-20 12:12 PM do you keep paper stock receipts? 30-Mar-20 12:12 PM I thought most people nowadays kept them in a bank account 30-Mar-20 12:13 PM Nah it's an online thing, def not my bank account tho 30-Mar-20 12:14 PM Nah, I'm just fully aware that there are three realistic paths for me. Intel Process Engineer in product development (that's the job they recruit so heavily out of here for), Air Force/Navy lab, or something in photonics. Though yes, I'd rather think about my career than do work at the moment :p 30-Mar-20 12:14 PM Thanks though nmz, that's kind of what I figured, but it's good to know for sure 30-Mar-20 12:15 PM Realize that intel job postings are super obscured 30-Mar-20 12:15 PM Oh I know. They send the manager of the team I'd join here every year and that'd be my in 30-Mar-20 12:16 PM Just checking you info in the introduction chat, looks like you'd be a fit for various validation jobs 30-Mar-20 12:16 PM So don't think at all that you'd be walled into a tool owner position 30-Mar-20 12:16 PM There's also intel labs which is harder to get into, but definitely hires 30-Mar-20 12:17 PM if you get real desperate there are tons of "qm" computer companies 30-Mar-20 12:17 PM d-wave is always hiring 30-Mar-20 12:18 PM Validation/failure analysis 30-Mar-20 12:18 PM Mechanical integration rocks. 30-Mar-20 12:18 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/Screen_Shot_2020-03-30_at_12.18.33_PM-14552.png 30-Mar-20 12:19 PM Isn't D-Wave like a super scam? 30-Mar-20 12:19 PM I saw the Nike missile museum in San Francisco. 30-Mar-20 12:19 PM Though yeah, good point about not being stuck as a tool owner. I don't think I'd mind the work, it sounds pretty similar to what running an experiment is, but the hours... 30-Mar-20 12:19 PM They had some 50's era analog computers to compute intercept between the Nike missile and the radar signature from the inbound Soviet bomber fleet. 30-Mar-20 12:19 PM It was like an Antikythera Mechanism. 30-Mar-20 12:19 PM Servos, cams, a switch to cause the Nike to go boom. 30-Mar-20 12:20 PM @Mezmorizor idk about you grad program, but 10-12 hours in a lab was pretty common for me in undergrad 30-Mar-20 12:21 PM It's common here too, but I get sick of it 30-Mar-20 12:21 PM Though that's more 6 days a week of 10-12 hours 30-Mar-20 12:21 PM Also not all that time would be in lab, I think, some would be filing work tickets for repairs that techs perform, analyzing results, etc 30-Mar-20 12:21 PM So 4 would be better for sure 30-Mar-20 12:21 PM Meetings on retooling or fungibility for multiple products 30-Mar-20 12:22 PM 10-12 in undergrad? what? why? 30-Mar-20 12:22 PM Biotech does a lot of cooking 30-Mar-20 12:22 PM Lots of waiting for stuff to cook, too 30-Mar-20 12:22 PM I don't know about them, but at one point I worked in a group whose quantum dot synthesis took about that long 30-Mar-20 12:22 PM And while this one isn't common, any matrix isolation experiment will take at least 12 hours 30-Mar-20 12:22 PM You get a lot of data in that 12 hours because the densities are high, but all the set up just takes that long 30-Mar-20 12:23 PM I get it with grad students 30-Mar-20 12:23 PM but undergrads?? 30-Mar-20 12:23 PM I was a bit of a perfectionist? 30-Mar-20 12:24 PM Our goal with undergrads is to balance how much stuff they break + how much time they consume to train 30-Mar-20 12:24 PM that sounds like burnout hell 30-Mar-20 12:24 PM with how much we can teach them 30-Mar-20 12:24 PM I mean, those days weren't all week long 30-Mar-20 12:24 PM I personally didn't do it, but I don't really know how an undergrad would do research in that quantum dot group without doing something like 12 hours once a week 30-Mar-20 12:24 PM But def some classes and some projects for sure 30-Mar-20 12:24 PM like even though they're 80% subsidized, they almost never feed back the $1600(?) they cost us over a summer 30-Mar-20 12:25 PM I enjoyed the lab component of my undergrad a lot... A lot more than writing up the lab reports, thats for sure! 30-Mar-20 12:26 PM Oh 30-Mar-20 12:26 PM Most of my peers were pretty incompetent relatively 30-Mar-20 12:26 PM So this is like the odd class with really long labs 30-Mar-20 12:26 PM Not sustained research 30-Mar-20 12:26 PM Like I mastered sterile technique at home in high school, while others were struggling with it and paying out the wazoo 30-Mar-20 12:26 PM IDK I took as many labs as possible 30-Mar-20 12:26 PM But yeah not 10-12 hours a day all week for months 30-Mar-20 12:28 PM Ok, cause there are lots of grad students that do that for years 30-Mar-20 12:28 PM envious of people who had worthwhile high school experiences 30-Mar-20 12:28 PM There was on average probably 6-10 hour days twice a week tho for most of my undergrad 30-Mar-20 12:28 PM like there are people who do 5 year PhDs with probably half the weeks each year being 60+ hours 30-Mar-20 12:29 PM @qualia well that was at home, not at the school's guidance 30-Mar-20 12:29 PM my first job in tech i put in a lot of comically long hours like that and i burnt out hard in like three years 30-Mar-20 12:29 PM 12-14 hour days, weekends sometimes. it's a hard habit to break if you're doing something you love 30-Mar-20 12:29 PM I dropped out of high school, it sucked 30-Mar-20 12:29 PM barring the 'i actually do have to be here for this' situations 30-Mar-20 12:29 PM ahh, gotcha 30-Mar-20 12:30 PM I felt dirty testing out, actually, it was easy enough that I felt like I could have skipped highschool completely 30-Mar-20 12:30 PM In retrospect, I wish I had been more focused back then 30-Mar-20 12:31 PM oh mood 30-Mar-20 12:31 PM But the setup just didn't work out 30-Mar-20 12:34 PM I treat grad school like a hobby and a job 30-Mar-20 12:34 PM Heh, I treated undergrad like that 30-Mar-20 12:34 PM I usually go in pretty early, and go home when I feel either unproductive or get bored 30-Mar-20 12:35 PM And also treated the university like my personal consulting firm 30-Mar-20 12:35 PM It was like lonnnnnngggg summer camp 30-Mar-20 12:41 PM The fact that I can't go in is slowly killing me tbh 30-Mar-20 12:41 PM Also depressing to know that the experiment would probably be up and running by the time this blows over if it didn't happen... 30-Mar-20 12:42 PM what is killing me is seeing the huge construction crews building "luxury condos" a block away from where I live 30-Mar-20 12:42 PM welp 30-Mar-20 12:44 PM https://thenarwhal.ca/send-everybody-home-potential-coronavirus-outbreak-at-site-c-dam-a-threat-to-fort-st-john-local-officials-say/ 30-Mar-20 12:44 PM giant work camp still going lol 30-Mar-20 12:49 PM Looks more like a prison complex 30-Mar-20 12:53 PM It really does 30-Mar-20 01:25 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/unknown-F3968.png 30-Mar-20 01:25 PM I've been targeted 30-Mar-20 01:39 PM Better drop out and get a job there 30-Mar-20 01:39 PM I've stood in one 30-Mar-20 01:39 PM thank you, next 30-Mar-20 01:39 PM Heh, my university just posted a summer research position for developing quantum computing outreach stuff for the science curriculum for K-12 in BC 30-Mar-20 01:41 PM That seems overly niche for science outreach 30-Mar-20 02:09 PM Construction is considered an essential service. It is however up to local authorities to determine if the project itself is essential. There have been a number of projects stopped here but at the same time the city and county are out doing road maintenance work all over my city. So some places are properly taking advantage of the situation. Also the last thing you want in a protracted time of danger such as we are in is lack of housing. California is desperately looking for places to house the homeless, at risk, and people who are recovering but still contagious. They are renting motel rooms and setting up trailers and RV’s in which to do so. 30-Mar-20 02:12 PM Funny how it takes a pandemic that affects the healthcare of everyone before housing is suddenly important 30-Mar-20 02:16 PM We are doing road maintenance here. Imo it's a decent idea 30-Mar-20 02:16 PM Low traffic and due to low oil price asphalt is cheaper too. 30-Mar-20 02:20 PM Can't that mostly be done pretty distantly, too? 30-Mar-20 02:20 PM Rather than a group of people standing in a small circle 30-Mar-20 02:20 PM https://www.cbc.ca/news/canada/british-columbia/drones-used-deliver-drugs-saltspring-london-drugs-drone-1.5264178?fbclid=IwAR1c1jm9QWwj9M8IoRNEg8XJnQjTY0Zf4UXj7SHnOBSiD7JJExpQdYCYpPA 30-Mar-20 02:20 PM Ok, don't show a preview lol 30-Mar-20 02:20 PM "Drone test flight successfully delivers prescription drugs in Canada for 1st time" Flew from a big island with lots of people to a small island with very few people to deliver prescription drugs. 30-Mar-20 02:20 PM Neat. 30-Mar-20 02:29 PM Yep 30-Mar-20 02:29 PM And they mostly have contact with their co-workers, not the general public 30-Mar-20 02:32 PM same is true of most jobs? 30-Mar-20 02:45 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/KJL_Logo-43EBA.png 30-Mar-20 02:45 PM Kurt J. Lesker sign-in logo 30-Mar-20 02:46 PM oh i love that 30-Mar-20 02:47 PM relevant to the "just buy standard parts" convo in #general lol 30-Mar-20 02:47 PM oh holy moly 30-Mar-20 02:47 PM nor-cal what is this 30-Mar-20 02:47 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/unknown-7733B.png 30-Mar-20 02:47 PM COVID-19, brought to you by pfeiffer vacuum 30-Mar-20 02:54 PM i've gotten so many covid 'Here's what we're doing' emails over the last month or two 30-Mar-20 02:54 PM from swagelok to my hair stylist 30-Mar-20 02:56 PM but nobody else has made a fun little graphic like nor-cal 30-Mar-20 03:01 PM digitalblasphemy, 2010's top search hit for 'cool 3d wallpaper', made a free wallpaper for it https://digitalblasphemy.com/cgi-bin/mobilev.cgi?i=publicenemy1&r=HDfree 30-Mar-20 03:01 PM digitalblasphemy, 2010's top search hit for 'cool 3d wallpaper', made a free wallpaper for it https://digitalblasphemy.com/cgi-bin/mobilev.cgi?i=publicenemy1&r=HDfree 30-Mar-20 03:02 PM 2010's top search hit 30-Mar-20 03:02 PM weird flex but ok 30-Mar-20 03:04 PM i just most associate them with, like, being 18 and REALLY into linux desktop themeing 30-Mar-20 03:04 PM which, like, is a time-honored tradition, don't get me wrong 30-Mar-20 03:07 PM compiz and beryl <3 30-Mar-20 03:07 PM can we just all use risc os and move on 30-Mar-20 04:27 PM https://www.theguardian.com/australia-news/2020/mar/30/astrophysicist-gets-magnets-stuck-up-nose-while-inventing-coronavirus-device?CMP=Share_iOSApp_Other 30-Mar-20 06:28 PM Lol 30-Mar-20 07:55 PM He should have his PhD removed while they are at it! Hahahaha 30-Mar-20 07:55 PM You have proven that you cannot have this sir! 30-Mar-20 08:17 PM revokes high school diploma from a shocking number of people 30-Mar-20 08:51 PM On a scale of 1-trash, controlling a stepper motor with mechanical relays and an arduino? 30-Mar-20 08:51 PM someone just called me in a panic and needs to have fine control over a stepper tonight, don't have any "drivers" or H-bridges... 30-Mar-20 09:11 PM Just don't hope that relay will last too long 30-Mar-20 09:12 PM it's to control a regulator valve 30-Mar-20 09:12 PM so few steps, thankfully ? 30-Mar-20 09:12 PM Should be OK for a while though... I'd make sure to turn off microstepping if they can tolerate the resolution 30-Mar-20 09:12 PM There is no data for the Mean Time Between Failures (MTBF) for Relays. This is because the mean failure rate greatly depends on the current flowing through the contacts, the load type, switching frequency, ambient temperature, and whether Relays are connected to an AC or DC load. 30-Mar-20 09:12 PM https://youtu.be/gQcg4nBlVMk 30-Mar-20 09:12 PM Lol 30-Mar-20 09:12 PM Your friend might go crazy from the noise 30-Mar-20 09:17 PM Imagine that with big steppers and big relays haha 31-Mar-20 09:57 AM making the wooden stand/shelf for toolmaker's microscope today 31-Mar-20 09:57 AM after coffee.. 31-Mar-20 10:44 AM A startup in Portland that makes pressurized beer kegs has developed a pressurized nitro cold brew keg. I have one. This is awesome for people going through coffee shop withdrawal. 31-Mar-20 10:44 AM https://www.growlerwerks.com/collections/nitro-for-cold-brew/products/ukeg-nitro-cold-brew-coffee-maker 31-Mar-20 10:47 AM God, I wish I had space for gadgets like that 31-Mar-20 10:47 AM And money for that matter 31-Mar-20 10:48 AM I got it a while ago as a Kickstarter. 31-Mar-20 10:48 AM I assume it works well? 31-Mar-20 10:48 AM It gets stored in the fridge, so it doesn’t need counter space. 31-Mar-20 10:48 AM Yes. 31-Mar-20 10:48 AM They also have growlers for beer. That... isn’t doing me much good now as it’s no longer possible to get a growler filled. 31-Mar-20 10:50 AM Sadly fridge space is especially a premium. My roommates have an ungodly amount of food on hand at all times 31-Mar-20 10:50 AM Is the number how many fluid ounces it holds? 31-Mar-20 10:50 AM 50 oz. 31-Mar-20 10:51 AM My roommates have an ungodly amount of food on hand at all times Doesn't sound so bad right now TBH 31-Mar-20 10:51 AM 1.479 L for those who use rational metrology. 31-Mar-20 10:52 AM It's still pretty bad. Putting leftovers in the fridge is like playing Jenga 31-Mar-20 10:52 AM get another fridge 31-Mar-20 10:52 AM Though I do have an ungodly amount of beans and rice 31-Mar-20 10:52 AM Nah, I'm moving to a 1 bedroom ASAP 31-Mar-20 10:52 AM Georgia Power owns and operates a total of 46 generating plants which include hydroelectric dams, fossil fueled generating plants and nuclear power plants 31-Mar-20 10:52 AM And actually having a kitchen and fridge space is the part I'm looking forward to the most 31-Mar-20 10:52 AM 46 31-Mar-20 10:52 AM wow 31-Mar-20 10:53 AM Yeah they're massive 31-Mar-20 10:54 AM Heh 31-Mar-20 10:54 AM all their plants combined is about the same as our dams 31-Mar-20 10:54 AM I may just impulse buy that cold brew thing anyway though 31-Mar-20 10:54 AM Or realistically after I move 31-Mar-20 10:55 AM https://energycentral.com/news/estatoah-falls-power-plant-had-served-area-1929 31-Mar-20 10:55 AM LOL 31-Mar-20 10:55 AM "It was more a novelty than an effective means of power distribution" 31-Mar-20 10:55 AM Then, one of the pipes that brought water to the generator from Mud Creek broke. "It was not cost-effective to replace the pipe," Brookshire said. "So it's been mothballed." 31-Mar-20 10:56 AM Yeah, that's a pretty big yikes 31-Mar-20 10:57 AM It's pretty cute tbh 31-Mar-20 10:57 AM also 31-Mar-20 10:57 AM if you like coffee you must have a Moka pot right? 31-Mar-20 10:58 AM No I don’t. I do have an aeropress. 31-Mar-20 10:58 AM I really like how Moka pots work 31-Mar-20 11:00 AM Back when I was working in fintech, my desk was practically a Starbucks. Aeropress, burr grinder, a “hipster gaiwan” for tea, some Japanese tea ceremony gear, and multiple tea infusers. 31-Mar-20 11:00 AM I can't find a good schematic 31-Mar-20 11:00 AM but basically as the water heats up the pressure of the air above it goes up (duh), and eventually that forces water up and through a puck sort of like an espresso machine 31-Mar-20 11:00 AM so the hot air forces water that isn't super hot through the coffee 31-Mar-20 11:01 AM Ok, yeah. That reminds me of siphon coffee machines. 31-Mar-20 11:01 AM Yeah very similar 31-Mar-20 11:01 AM One appeared prominently in Hannibal. 31-Mar-20 11:02 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/340-574D4.png 31-Mar-20 11:02 AM the "trapped air" forces the water up from the bottom 31-Mar-20 11:02 AM well before the water is boiling 31-Mar-20 11:03 AM https://siphoncoffee.net/4-of-the-best-balancing-siphon-coffee-makers/ 31-Mar-20 11:03 AM I have a rather cheap electric espresso machine that appears to have broke. I’ve been meaning to take it apart to see what’s up. 31-Mar-20 11:04 AM they also make giant moka pots 31-Mar-20 11:04 AM some that make like 30 cups at once 31-Mar-20 11:04 AM (a cup being an espresso-sized portion) 31-Mar-20 11:04 AM because the coffee that comes out is pretty close to espresso 31-Mar-20 11:05 AM I know geeks who will hack industrial PID controllers to medium grade espresso machines to make them better. 31-Mar-20 11:05 AM I thought most of the "problems" with the medium grade ones were just that they didn't have sensing 31-Mar-20 11:05 AM A friend visited from Germany and she brought her Moka pot. 31-Mar-20 11:05 AM not that they had poor control 31-Mar-20 11:05 AM Like I thought most were "factory calibrated" with one temp sensor/heater and that was that 31-Mar-20 11:07 AM It’s the Rancilio Silvia. Apparently this is the cheapest “real” espresso machine but it has poor temp control. 31-Mar-20 11:07 AM I haven’t done this, just repeating what a friend did. 31-Mar-20 11:09 AM yeah just if you were gonna bother at all I would assume you'd also do pressure sensing 31-Mar-20 11:09 AM I bet the "best" espresso would have a dynamic temp/pressure going through the puck too 31-Mar-20 11:09 AM do some sort of spectroscopy of the coffee stream 31-Mar-20 11:09 AM and adjust as it changes consistency 31-Mar-20 11:10 AM Apparently it has something to do with cold water hitting the boiler 31-Mar-20 11:10 AM personally I sometimes just have nestle instant 31-Mar-20 11:10 AM Something that can “learn” and can respond to dynamic changing conditions rather than a simple thermostat is ideal. 31-Mar-20 11:10 AM Cold water hitting the boiler does what? 31-Mar-20 11:10 AM Wait does a $1000 machine really not have any form of microcontroller? 31-Mar-20 11:12 AM Apparently not. 31-Mar-20 11:13 AM I think a DIY espresso machine would be a lot of fun 31-Mar-20 11:32 AM Computer controlled pour over: 31-Mar-20 11:32 AM https://www.heymugsy.com/whymugsy 31-Mar-20 11:40 AM No filter? 31-Mar-20 12:08 PM I've got an aeropress, mostly use it for camping though 31-Mar-20 12:08 PM Otherwise we've got a superauto espresso machine 31-Mar-20 12:08 PM And a drip coffee pot when guests come stay, who drink a lot of coffee and don't want to stand at the espresso machine 31-Mar-20 01:11 PM So, trash cables and how there truly are no standards 31-Mar-20 01:11 PM cries in crushed worldview 31-Mar-20 01:11 PM but that explains a lot 31-Mar-20 01:11 PM @GigaSquirrel This is also one of the reasons why Belden and Times Microwave and HuberShuner have their own coax types 31-Mar-20 01:11 PM Like LMR195 31-Mar-20 01:12 PM @rfs I don’t think so, because I mostly use it for radio stuff and it doesn’t screw SWR too badly 31-Mar-20 01:12 PM people literally hated MHV so much the next common connector was "safe" high voltage 31-Mar-20 01:12 PM and people still use MHV on new products 31-Mar-20 01:12 PM Which is 0.195 inch coax made my Times Microwave, which is more or less the same as RG58, but with foam dielectric for lower loss 31-Mar-20 01:12 PM and KSR195 is a chinese cable with similar parameters :P 31-Mar-20 01:12 PM I am putting a presentation together for work eventually of “don’t shove BNC connectors onto MHV connectors” 31-Mar-20 01:13 PM And belden just has four numbers for their cables. 31-Mar-20 01:13 PM "yeah it's belden 9913" 31-Mar-20 01:14 PM how do we feel about conflat using metric and imperial numbers for ID or OD ? 31-Mar-20 01:14 PM Which I think is a 75ohm hardline coax made for cable TV distribution. 31-Mar-20 01:14 PM VAT sells their imperial CF gate valves by ID and it makes for very scary invoices 31-Mar-20 01:15 PM the same way we feel about everything that uses imperial @idmb 31-Mar-20 01:15 PM 1/4-20 is the best bolt 31-Mar-20 01:15 PM fight me 31-Mar-20 01:15 PM only imperial bolt I know is #4-40 31-Mar-20 01:15 PM Which is just the american M3 31-Mar-20 01:15 PM Sadly I have to have some at hand for some waveguide stuff. 31-Mar-20 01:16 PM cheap BNC tees and couplers continue to burden me on the regular 31-Mar-20 01:16 PM i've thrown probably a dozen in the trash the last month 31-Mar-20 01:16 PM All cheap 90* angles are bad and or complete trash. 31-Mar-20 01:18 PM MHV's one nice perk (in the cases where i can't swap it with SHV) is that i can mash a 90-degree BNC bend on it and never ever take it off 31-Mar-20 01:18 PM Add in the old 10Base-T coax ethernet and you get cheap mass produced BNC T's and it sucks hard. 31-Mar-20 01:18 PM ALSO I discovered one of my old homemade scintillator preamps actually uses a connector that looks a lot like SHV but is not SHV 31-Mar-20 01:18 PM still not sure what it is 31-Mar-20 01:19 PM I found a HV supply in a closet that had an MHV connector 31-Mar-20 01:19 PM but it didn't have the bayonnet nubs 31-Mar-20 01:19 PM so the cable could just be yanked off 31-Mar-20 01:21 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/20200331_1320342-6D4BA.jpg 31-Mar-20 01:21 PM ?_? 31-Mar-20 01:21 PM shv on the right 31-Mar-20 01:22 PM I assume you've searched the model # that's listed on it? 31-Mar-20 01:22 PM just now yeah >_> didn't notice it before 31-Mar-20 01:22 PM it's a Reynolds 531 somethingorother 31-Mar-20 01:23 PM https://www.teledynedefenseelectronics.com/reynolds/prod/High%20Voltage%20Connectors%20and%20Assemblies/Pages/521-531%20Series%20Single%20Pin.aspx 31-Mar-20 01:23 PM This? 31-Mar-20 01:24 PM yeah looks like it 31-Mar-20 01:25 PM guess it makes sense, the power connector on this is an awful milspec Bendix 6-pin .. thing 31-Mar-20 01:25 PM Ewwww 31-Mar-20 01:25 PM MHV connectors have that darn protruding center pin too. I think every time I’ve disconnected the cable on a (still dead) neutron detector I’ve shocked myself. 31-Mar-20 01:27 PM I don't know why anyone even bothered with MHV in the first place, BNC is literally safer in that respect 31-Mar-20 01:27 PM something something standards 31-Mar-20 01:28 PM Just make everything UHF connectors and live with it 31-Mar-20 01:29 PM alligator clips 31-Mar-20 01:30 PM Fahnestock clips 31-Mar-20 01:31 PM 300 ohm twin lead probably has good voltage standoff 31-Mar-20 01:32 PM @Addison-110m I'm interested in looking at your connectors presentation... I'm new to them and need to hook up my RF generator to a vacuum chamber soon 31-Mar-20 01:33 PM "it's radio, just use an antenna!" 31-Mar-20 01:33 PM It's probably just going to be like 3 slides of "dont screw things up" 31-Mar-20 01:35 PM Well one could always inductively couple through a viewport :D 31-Mar-20 01:35 PM If well done and resonant you could even get better than -3dB insertion loss. 31-Mar-20 01:36 PM related: look at this tiny coil we used to pick up GHz magnetic fields: 31-Mar-20 01:36 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/unknown-D893B.png 31-Mar-20 01:36 PM cute 31-Mar-20 01:36 PM that's mm tick graph paper 31-Mar-20 01:36 PM mcmaster sells really tiny linear rails 31-Mar-20 01:36 PM I think making a tiny cnc would be fun 31-Mar-20 01:36 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/8381kc1-master1492719483halfx_636283162838-EB43A.png 31-Mar-20 01:36 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/8381k280_miniature20ball20brng20carriage20-ECE62.png 31-Mar-20 01:36 PM just thinking about those dimensions makes my skin crawl 31-Mar-20 01:44 PM M1 lulz. How do you even hold that screw? 31-Mar-20 01:44 PM #0-80 is already such a pain 31-Mar-20 01:47 PM they normally have a deep slot for the allen key 31-Mar-20 01:47 PM so they're not that bad 31-Mar-20 01:49 PM until you don't find the start of the thread and it jumps off the key 31-Mar-20 01:49 PM magnets 31-Mar-20 01:49 PM IDK I've done some stuff with M1, wasn't really a bother other than needing to have a couple extra bolts so that when you drop one you can let it go 31-Mar-20 01:49 PM rather than hunting for it 31-Mar-20 02:56 PM stand/shelf for toolmaker's microscope built 31-Mar-20 02:56 PM will hoist it up soon enough 31-Mar-20 02:56 PM let's hope I picked a good height (if anything it would be slightly tall) 31-Mar-20 02:56 PM I really didnt want to be bent down looking through a scope for a while 31-Mar-20 02:57 PM speedy 31-Mar-20 02:59 PM speedy? 31-Mar-20 03:03 PM feels like just yesterday you were deciding whether or not to buy it 31-Mar-20 03:13 PM oh, hah, yeah.. I wasnt about to let it slip me by 31-Mar-20 03:13 PM I also got the internal bore measuring head for it, will need ot fab up the itnerface.. and it was the inch version (I think) which is argh 31-Mar-20 03:13 PM I also have that optical divding head + table of the same product line coming 31-Mar-20 03:13 PM (Leitz Opto-Metric) 31-Mar-20 03:13 PM k, well time to rearrange the mess thatis downstairs and maybe hoist it up, will show pics once it's all settled 31-Mar-20 04:44 PM micrscope install https://imgur.com/a/uMsP0LE 31-Mar-20 10:31 PM piGuy's statement on COVID-19: During these troubling times, I want you to know I will be operating on a normal schedule with uninterrupted lurking on this discord, providing the same level of service you have come to expect from me. 02-Apr-20 09:25 AM anyone have any experience with the google assistant API ? 02-Apr-20 09:25 AM tried following instructions to set it up on a raspberry pi and the errors I'm getting don't seem to be the usual problems 02-Apr-20 12:33 PM My experience with the google assistant is, it kinda sucks 02-Apr-20 12:33 PM Before I recently disabled it on my phone, music being played from Android Auto was triggering the "hey Google" voice prompt and the music wasn't even remotely sounding like that phrase 02-Apr-20 12:33 PM AI isn't trustable stuff, for the most part. 02-Apr-20 12:44 PM I realize that is an aside from what you're seeking. I just couldn't help myself. 02-Apr-20 12:53 PM this voice kit was $1.50 at micro centre like a year or two ago: 02-Apr-20 12:53 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/2Q-1A6A4.png 02-Apr-20 12:53 PM bought it and never got around to using it 02-Apr-20 12:53 PM so I put it together last night but of course the instructions are slightly out of date and the UI / instructions for the google setup don't quite match 02-Apr-20 01:20 PM got it working 02-Apr-20 01:20 PM I don't really know how 02-Apr-20 01:33 PM sounds like a google product 02-Apr-20 03:26 PM you like linux 02-Apr-20 03:26 PM why can you execute files if you're up a directory 02-Apr-20 03:26 PM and just write the directory it's in and then the filename 02-Apr-20 03:26 PM btu if you're in the right directory, you can't do that 02-Apr-20 05:44 PM ? 02-Apr-20 05:44 PM You can run binaries from the same dir or another 02-Apr-20 05:44 PM ./myLocalExecutable 02-Apr-20 05:44 PM /some/other/dir/myExecutable 02-Apr-20 05:44 PM ./subDir/myExecutable 02-Apr-20 05:46 PM the ./ thing doesn't seem to work 02-Apr-20 05:46 PM k I have no idea 02-Apr-20 05:46 PM it works 02-Apr-20 05:46 PM all is well 02-Apr-20 06:20 PM Lol 02-Apr-20 06:57 PM huh 02-Apr-20 06:57 PM oh, if you specify a partial or complete path to an executable, your shell will know you mean that you want to run it. if it's in the same directory, then the shell (by default -- and for good reason) doesn't automatically assume that you mean 'the executable in this directory' without being explicit about it (. is an alias for 'this current directory that i'm in') 02-Apr-20 06:57 PM it does this because.. say you just decompressed an archive or something and you go into the created directory. if it contains an executable-mode file called ls, and you go to do ls to see what's in that directory, it'll execute that instead of using a shell builtin or traversing your $PATH to find your sanctioned system executables 02-Apr-20 06:57 PM so, security, mostly 02-Apr-20 06:57 PM some desktop distros way back in the day used to add . to $PATH and it was a minuscule convenience that made users significantly less safe when working with Strange Downloads 02-Apr-20 07:07 PM you should see how long you last on suicide linux 02-Apr-20 07:08 PM lmfao 02-Apr-20 07:08 PM there used to be a doom mod that would turn your computers' files into monsters 02-Apr-20 07:08 PM and when you killed them it'd delete them 02-Apr-20 07:08 PM oh, but, also.. ./thingy should work if you're in the same directory as it. if it doesn't .. the permissions on thingy might be wrong (e.g. if it says Permission denied). in which case, chmod +x thingy will set the executable bit on it. you can see permissions with ls -l thingy; it's a bitmask, and it should look something like -rwxr-xr-x. read, write, execute, for the user, group, and 'everyone else'; the first - is for designating things like 'this is a directory' or weirder modes 02-Apr-20 07:08 PM in the event you need to know this ever again 02-Apr-20 07:12 PM chmod is my go-to thing when I don't know what I'm doing 02-Apr-20 07:12 PM 99.9% of the time when I'm using linux it's setting up a newly flashed raspberry pi 02-Apr-20 07:12 PM figure not much can go wrong 02-Apr-20 08:16 PM 99% of the time you can put in your linux question/issue into google and add ubuntu to the end, even if it aint ubuntu, and you'll get teh answer 02-Apr-20 08:16 PM I never ran desktop ubuntu.. had to admin a bastardized server edition for a few years, but yeah 02-Apr-20 08:16 PM but it is certainly adventageous to learn how to work a linux bash prompt if you ever run linux, even as a desktop 02-Apr-20 08:41 PM Oh man, suicide linux sounds pretty fun 02-Apr-20 10:41 PM Is suicide linux the one with as many security vulnerabilities baked in as possible? 02-Apr-20 10:41 PM Oh, even better 02-Apr-20 10:56 PM suicide linux would be fun to use on lab computers 03-Apr-20 09:34 AM https://cdn.discordapp.com/attachments/513191263894372352/695351562079305738/1585841869-20200402.png 03-Apr-20 09:48 AM never used them, but whiskey rocks work well - I am told 03-Apr-20 09:48 AM and I dont drink coffee enough to try those type, I have espresso 03-Apr-20 09:49 AM heating whiskey rocks? 03-Apr-20 11:04 AM cooling? you freeze them or similar prior, and keeps your whiskey cool in the glass - without adding water to it like an ice cube would 03-Apr-20 11:04 AM you certainly dont want to dilute expensive scotch 03-Apr-20 11:05 AM ah I thought you were saying whiskey rocks work well for keeping coffee hot 03-Apr-20 11:09 AM I remember the doom mod. Processes were monsters, not files. Kill the monster to kill the process. Unfortunately, monsters sometimes killed each other. Running the mod as root could be... interesting. 03-Apr-20 12:16 PM as long as the rocks are hot, I dont see why it wouldnt work for coffee, but it may impart more flavor of releasing minerals as being hot will dissolve more, maybe 03-Apr-20 12:34 PM @rdpierce Heh, I remember that one and tried it 03-Apr-20 03:33 PM WOAH WOAH WOAH. The Apple designer Jony Ive got knighted? WHAT 03-Apr-20 07:25 PM that was a nice little earthquake 4.9M about 55mi away 04-Apr-20 03:41 AM dont remember who was talking about this: 04-Apr-20 03:41 AM https://twitter.com/PJCullen100/status/1246376786495041542 04-Apr-20 08:23 AM @LRM a friend created a new metric for describing earthquake intensity. 04-Apr-20 08:23 AM Well the Pants Scale is an experiential scale for measuring earthquake intensity, and it works like this. When you start to feel an earthquake, you estimate to what degree it feels like it is going to require you to put on pants. If the shaking stops before you’ve decided if it requires pants, it’s a non-pants earthquake If it feels like you should put on pants but the shaking stops before you can get to them, it’s a mild pants earthquake If it keeps shaking long enough to get pants on, it’s a strong pants earthquake If you realize you need pants but it’s already way too late because everything is already coming down around you, that’s a severe, Beyond Pants event. 04-Apr-20 09:12 AM I can see how that could be useful haha 04-Apr-20 10:53 AM Was In a hotel in LA during the Northridge earthquake. You find out really quickly how many people sleep naked in that situation! Hahaha 04-Apr-20 04:18 PM Sometimes I wonder if I should stop being so interested in complex hobby/entrepreneurial ideas and just work my programming day job and have weekends camping or other "fun" stuff with my family 04-Apr-20 04:18 PM In some ways trying to achieve what I want feels like potentially and endless rabbit hole of engineering and science experiments 04-Apr-20 04:25 PM isn't that what cushy academia jobs at small universities are for 04-Apr-20 04:25 PM you get to play with science monday-friday 9-5 and nobody cares what else you do 04-Apr-20 05:19 PM Yeah but you have to get through a PhD first 04-Apr-20 05:19 PM I was thinking of doing one, but one class at a time for the pre-reqs were too tough while working full or even part time, and taking care of my almost 2 year old during the day 04-Apr-20 05:19 PM Maybe I'll start back in a few years when he goes to some sort of school 04-Apr-20 05:28 PM lol sign up for a phd when they sign up for undergrad 04-Apr-20 05:28 PM TA their friends 04-Apr-20 05:28 PM ruin their lives 04-Apr-20 06:45 PM Haha 04-Apr-20 06:45 PM Might be the best timing 04-Apr-20 06:45 PM "I'm not here to embarrass you or keep you in-line, son" 04-Apr-20 06:45 PM I at least got through calc 3 and part of calc 4 before calling it quits last year 04-Apr-20 06:45 PM It didn't help that literally every first week of class, @AdamMcCombs showed up and wanted to help out with vacuum stuff 04-Apr-20 06:45 PM And obviously I was too happy about that and couldn't pass the deal up 05-Apr-20 10:09 AM I’m about to take calc again after oh 23 years.... 05-Apr-20 10:14 AM :D Have Fun 05-Apr-20 10:38 AM Honestly calc is so easy to learn now that khan academy exists, it’s awesome 05-Apr-20 10:38 AM All the way up to pdes 05-Apr-20 11:04 AM awhile back people were discussing some chemistry related discords, any current suggestions from the crowd about where is decent or not? 05-Apr-20 11:28 AM I'm an admin on one, that has a pretty good user base (nearly 2k) 05-Apr-20 11:28 AM lots of decently knowledgeable people (I'm not really included in that, I was sort of grandfathered in from IRC) 05-Apr-20 11:28 AM https://discord.gg/wZJc5d 05-Apr-20 11:28 AM tons of specific rooms, lots of people asking for homework questions all day 05-Apr-20 11:28 AM IRC (freenode, ##chemistry) basically died soon before someone from there started this 05-Apr-20 11:28 AM I check it maybe a few times a week, I hardly stay on there though 05-Apr-20 11:28 AM just a lot else going on 05-Apr-20 11:28 AM also, please let me know if you think it is decent or not! hah 05-Apr-20 11:42 AM thanks, I will check it out 05-Apr-20 12:12 PM That Chem server felt more like beginner stuff, high school and college homework level, rather than advanced/applied/engineering/novel level stuff 05-Apr-20 12:13 PM yeah... after looking around a bit i do not really see a place where i think what i was looking to ask would get an answer. oh well. 05-Apr-20 12:13 PM still looks like a nice community for people at the more basic levels and for homework help 05-Apr-20 12:27 PM What were you looking to ask? 05-Apr-20 12:27 PM Maybe here is the best? 05-Apr-20 12:32 PM I think I already discussed it with some former members of this discord, just some LaBr3/CeBr3 production questions that have been floating around my head for awhile 05-Apr-20 12:44 PM yeah, it's a bit more of a HW help server.. but it never hurts to ask, just dont expect an immediate response 05-Apr-20 12:44 PM or a response at all if it is a bit over their heads 05-Apr-20 12:44 PM have you tried in a proper forum, like Science Madness? 05-Apr-20 12:44 PM people usually dont reply there unless they have some input 05-Apr-20 12:44 PM that would likely be the best place, imo 05-Apr-20 12:49 PM yeah I was considering them just don't remember my username or password heh guess I will see if it is attached to my email or make a new one 05-Apr-20 12:50 PM Ooo, science madness eh? 05-Apr-20 12:50 PM I haven't tried that place 05-Apr-20 12:51 PM just be careful you do not get any bad ideas there lol 05-Apr-20 12:52 PM Heh yeah. 05-Apr-20 12:52 PM Many quiestions about some chemicals that then seem usable in energetics or say, novel isopropylamines. 05-Apr-20 12:52 PM But at least most folks there have good sense. 05-Apr-20 12:53 PM so, there are some posts about that - and they will always welcome the scientific discussion of it - but they will not spoonfeed, and they know what is up, usually 05-Apr-20 12:53 PM same deal with explosive compounds, they kinda know what is up 05-Apr-20 12:53 PM dont obfiscate too much or they know you are hiding something 05-Apr-20 12:53 PM also, there are other forums for that kind of talk 05-Apr-20 12:56 PM Naturally. 05-Apr-20 12:56 PM But I do appreciate the general atmosphere on science madness. They have managed to survive for more than a decade. 05-Apr-20 12:59 PM Ah most of my interest is semiconductor type fab processes 05-Apr-20 09:53 PM would like to start a materials discord tbh 05-Apr-20 09:53 PM there’s a bit of overlap with vacuum stuff so some stuff makes sense to chat about here, but a dedicated materials one would be nice 05-Apr-20 11:30 PM Yeah, something a little more than homework level expertise/interest 05-Apr-20 11:30 PM I tried to get into some groups like that on linkedin 05-Apr-20 11:30 PM But there seemed to be more link sharing than entrepreneurs or small business owners who could offer services, supplies, process recommendations or idea generation, etc 06-Apr-20 01:56 PM .. what does 'trigrature' mean? 06-Apr-20 01:56 PM http://www.trigature.com/ 06-Apr-20 01:57 PM oh, it's this guy's specific Thing, i see 06-Apr-20 01:57 PM Oh yes 06-Apr-20 01:57 PM Also https://twitter.com/oh2aue?lang=en 06-Apr-20 01:59 PM my eyes 06-Apr-20 01:59 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/ESSuFBAXsAUZTXt-81A78.png 06-Apr-20 01:59 PM my poor eyes 06-Apr-20 01:59 PM That's the usual hamsoft UI 06-Apr-20 02:00 PM this is the ideal UI 06-Apr-20 02:00 PM you may not like it, but this is what peak performance looks like 06-Apr-20 02:01 PM pretty sure vu meters are only optimal in terms of aesthetics 06-Apr-20 02:01 PM and fall under the same flaw as pie vs bar charts 06-Apr-20 02:01 PM well ok the skeumorphism's a little silly 06-Apr-20 02:02 PM also the aspect ratio order is random 06-Apr-20 02:03 PM i like SRIM's UI too 06-Apr-20 02:03 PM https://twitter.com/profanegeometry/status/1209321135763939330 06-Apr-20 02:03 PM IDK what hamsoft is, is it configurable and you're just saying this is one person's configuration of it but that they're all ugly? 06-Apr-20 02:03 PM SRIM looks like SIMION's UI 06-Apr-20 02:07 PM @idmb Software by hams, aka amateur radio operators 06-Apr-20 02:09 PM yeah but is it just a gui that lets you drag and drop panes 06-Apr-20 02:09 PM or does it always look like that? 06-Apr-20 02:10 PM Always looks like that 06-Apr-20 02:10 PM Oh 06-Apr-20 02:10 PM ok lol 06-Apr-20 02:10 PM This one does https://pbs.twimg.com/media/D_CJsIoX4AEWKDn.jpg:large 06-Apr-20 02:10 PM And yes and I need to look at the documentation to use it form time to time 06-Apr-20 02:15 PM gotta love the multiple colormaps on their graphs for no apparent reason lol 06-Apr-20 02:15 PM plasma and inferno? 06-Apr-20 02:15 PM ahh 06-Apr-20 02:15 PM viridis and inferno 06-Apr-20 03:00 PM @idmb hacking satellite tv? 06-Apr-20 03:01 PM ? 06-Apr-20 03:01 PM also great title for an article: https://physics.aps.org/articles/v13/s39 06-Apr-20 03:02 PM @idmb your screenshot of the dvb-s tuner 06-Apr-20 03:04 PM oh nah that's from the twitter account rfs linked 06-Apr-20 03:04 PM Ooo 06-Apr-20 03:04 PM Looks like fm broadcast 06-Apr-20 03:04 PM Well there was a video frame displayed 06-Apr-20 03:04 PM And dvb-s is digital video from satellites 06-Apr-20 03:05 PM Oh, I’m completely confused. Wrong picture 06-Apr-20 03:25 PM just two offset differential sinusoidal signals smoothed out with some capacitors, while moving the sensor for output 06-Apr-20 03:25 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/DSC_1168-773C3.jpg 06-Apr-20 03:25 PM the A signal is yellow & light blue.. which is obv in a different voltage range than signal B (the bottom most line is a MATH on signal A) 06-Apr-20 03:25 PM but, I can reliable see what direction via quadrature type of A<->B 06-Apr-20 03:25 PM the plan is then for an opamp w/ different gains of A/B/Ref into a uC ADC (of maybe a ESP32? to then an android based DRO?) 06-Apr-20 03:25 PM I need 3 opamps per scale, and so far only 2 on this machine 06-Apr-20 03:33 PM @nmz787 amateur radio operators can do legal satellite TV over the QO-100 wideband transponder. 06-Apr-20 03:33 PM The transponder is there so that folks can do it 06-Apr-20 03:33 PM 2405Mhz or something up, 10489MHz down 06-Apr-20 03:50 PM @rfs oh cool... So you can transmit TV over satellites? 06-Apr-20 03:50 PM Over that one 06-Apr-20 03:50 PM So Yes. 06-Apr-20 03:50 PM Only one so far that has a wide enough transponder 06-Apr-20 03:50 PM there was talk about an USA one with 5.6GHz uplink and 10.45Ghz downlink, but that did not seem to materialize 06-Apr-20 03:50 PM and AMSAT-NA is notoriously tightlipped about everything. And add ITAR on satellite space segment stuff to it and even less info exists. 06-Apr-20 04:49 PM better.. 06-Apr-20 04:49 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/DSC_1171-9585F.jpg 06-Apr-20 04:49 PM apparently the alignment was terrible.. readjusted and went from ~50-100mv to 250-300 (w/ caps) 06-Apr-20 04:49 PM and it naturally smoothed the signal out quite a bit, as it wasnt so low 06-Apr-20 04:49 PM the flat peaks were not expected so much though, I think I still have some adjustment to do to get better/less saturation at a 'peak' on the grating 06-Apr-20 04:49 PM or maybe I'm just looking at it incorrect, for instance, where the yellow and blue cross towards the end (not the very end though) would certain be a point where you can then take the reading from blue instead of yellow, as yellow is then saturated 06-Apr-20 04:49 PM iunno.. first time playing around with this analog type quadrature, so sort of all new to me 06-Apr-20 04:49 PM only quads I ever played with were pure digital before I got my hands on it 06-Apr-20 04:49 PM btw, that output is me manually rotating a translating knob on the microscope.. so ther eis some human error of movement there, but I dont think I ever stopped like the flats may protray (as the other signal still shows a slope then) 06-Apr-20 04:49 PM I am sure there is much better adjustments to be done 06-Apr-20 04:49 PM for better signal, but that is miles better than where I was 06-Apr-20 04:49 PM btw, the goal here is to interpolate the 10um gratings to something smaller 06-Apr-20 06:13 PM Quoth my gf: I started a shopping list. It’s under the Sedan Crater magnet on the fridge. Nukes for civil engineering... and shopping! 06-Apr-20 06:33 PM So, not sure why my brainw asn't thinking right.. but simply use 90 deg of ea signal as the sensitive area, of -45 to 45 06-Apr-20 06:33 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/DSC_1173-E16B8.jpg 06-Apr-20 06:33 PM thus you avoid any of the actual peaks 06-Apr-20 06:33 PM sometimes one signal is a little stronger than the others.. need to work on the calibration a bit more, and it can vary depending where on the scale it is 06-Apr-20 06:33 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/DSC_1174-6DE9D.jpg 06-Apr-20 06:48 PM i missed it in backlog -- what are you working on? o.o 06-Apr-20 06:55 PM old Heidenhain glass scales for a toolmaker's microscope 06-Apr-20 06:55 PM 10 micron grating 06-Apr-20 06:55 PM analog output - so you should interpolate to get more resolution 06-Apr-20 06:55 PM they sell boxes to do it, I believe it converts it to TTL 06-Apr-20 07:02 PM ooh gotcha 06-Apr-20 11:37 PM I've built a second COVID19 diagnostic device. 06-Apr-20 11:37 PM a second of the same thing, or a second version 06-Apr-20 11:38 PM I also have some coronavirus DNA in my fridge in my home lab. 06-Apr-20 11:38 PM that seems sketchy 06-Apr-20 11:38 PM good to know.. 06-Apr-20 11:38 PM a second of the same thing 06-Apr-20 11:38 PM just the signature part that got PCR'd ? 06-Apr-20 11:38 PM well there's no such thing as coronavirus DNA, so it's perfectly safe. 06-Apr-20 11:38 PM RNA? 06-Apr-20 11:38 PM and no phage? 06-Apr-20 11:39 PM Yeah it's just a DNA template of the CDC target sequences 06-Apr-20 11:39 PM I only know a few words in this realm 06-Apr-20 11:39 PM ah, yeah, that makes sense 06-Apr-20 11:39 PM But I do have like 50 COVID19 tests here at home. And my two devices can process 400 samples a day. I'm probably on par with like Alabama for COVID19 testing. 06-Apr-20 11:40 PM do you have a PCR machine? 06-Apr-20 11:40 PM or the little tester is a mini one in the first place 06-Apr-20 11:40 PM Only PCR machine I have is my homemade one. The test is isothermal though, so the device just holds constant temp. 06-Apr-20 11:40 PM interesting 06-Apr-20 11:40 PM the chem server I am apart of had one of our admins do a scientific talk about it and some of the testing methods etc, like 2 days ago 06-Apr-20 11:40 PM turns out he is vested in the matter - and is pursuing funding for a certain aspect 06-Apr-20 11:42 PM I thought that by making more devices, I could offload testing to the assay developers. Instead, they just gave me the assay and make me do the testing. Ugh! 06-Apr-20 11:42 PM is yours still ~15mins for results @piGuy ? 06-Apr-20 11:42 PM cant recall what area though 06-Apr-20 11:42 PM and by testing, you mean prelim, right? 06-Apr-20 11:42 PM not infield testing stuff 06-Apr-20 11:43 PM @LRM, it's currently taking about 22 minutes for 10e4 copies of virus. I think there are efforts to make it faster though. 06-Apr-20 11:43 PM Yeah I think we're getting some actual patient samples to run the test on this week. 06-Apr-20 11:44 PM thats pretty quick from my fairly basic understanding of the testing methods available 06-Apr-20 11:45 PM The device is only about $200, and the test is maybe $5. So it's probably the cheapest rapid point of care testing system. 06-Apr-20 11:47 PM wow that is leaps and bounds ahead of others in cost 06-Apr-20 11:47 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/image0-0965F.jpg 06-Apr-20 11:47 PM probably tack on a zero or so for production models im guessing 06-Apr-20 11:47 PM are there any plans for mass production yet in case all of the qualifications go smoothly? 07-Apr-20 12:08 AM Yes, we're in discussions with some companies that are interested in commercialization 07-Apr-20 12:09 AM awesome 07-Apr-20 12:13 AM Running a dilution series to validate my second device. Now I'm suddenly paranoid about amplicon contamination. I don't think 70's shag carpeting is an approved flooring for a molecular biology lab.... 07-Apr-20 08:13 AM My partner took her Fab Lab 3D printer home we are now pumping out frames for face shields. 07-Apr-20 08:13 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/image0-9185A.jpg 07-Apr-20 08:13 AM There’s a group in Chicago assembling these and distributing them to hospitals in need of them. 07-Apr-20 08:13 AM https://covidsupplyconnection.com/3d-printed-face-shield/ 07-Apr-20 08:32 AM This design is popular in Chicago. Faster print time and less material than the NIH design, and there’s a group handling distribution who have hospitals that are using them. 07-Apr-20 09:08 AM @rdpierce I hope you've seen the laser cutter designs? 07-Apr-20 09:08 AM Linus tech tips had 30 3D printers running and wasn't using their giant lasercutter, 07-Apr-20 09:08 AM And I'm pretty sure one large-bed lasercutter can make shields faster than 30 printers 07-Apr-20 09:15 AM I've never thought I'd ever see 3 v's in one equation 07-Apr-20 09:15 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/939fb0c55c6f10e4bc3462f9b4f528fc-8E33D.png 07-Apr-20 09:15 AM V, v and nu 07-Apr-20 09:20 AM The makerspace is looking into options with both laser cutters and a vacuum former. 07-Apr-20 01:31 PM sooo.... yeaaahhhh.... on-campus got pushed back further, looking at May 4th right now (it was supposed ot be in one week) 07-Apr-20 01:47 PM our official quarantine doesn't lift here until early may but i suspect work is gonna hold out longer still 07-Apr-20 01:47 PM german universities haven't had a research interruption 07-Apr-20 01:47 PM we're out until at least may, probably june or july 07-Apr-20 02:35 PM Ok, so I'll wait before sending you my Polimaster watch. 08-Apr-20 10:56 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/unknown-232C7.png 08-Apr-20 10:56 AM From https://xkcd.com/2288/#-1800,2318 09-Apr-20 12:10 PM Anyone here ever use openfoam? 09-Apr-20 12:14 PM Only read about it 09-Apr-20 12:14 PM Was planning to use fenics and dolfin eventually 09-Apr-20 12:14 PM But that idea's been floating around my head for at least 5 years 09-Apr-20 12:14 PM Wanna use it for nano and micro fluidics simulations 09-Apr-20 12:14 PM But have this far been caught up in fab technique research and electrical sensing research 09-Apr-20 04:04 PM Thinking of helping someone out with some biomechanics research modelling how bugs dive 09-Apr-20 04:04 PM since normally they're experimentalists, now they kinda have to do numerics... 09-Apr-20 06:02 PM the experimental to modelling transition was tough lol 09-Apr-20 06:58 PM are there any DIY proximity sensors, maybe capacitive style, maybe something like a magnet on a piezo that deforms the closer it gets to the target metal surface? 09-Apr-20 07:56 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/unknown-2F4B9.png 09-Apr-20 07:56 PM from ARS cryo lol 09-Apr-20 09:23 PM @Noxz I made a theremin type thing once by just wiring a thin foil to an STM32 ADC input 09-Apr-20 09:23 PM hah, I was looking at an Alesis AirFX for a while 09-Apr-20 09:23 PM uses a camera and a IR badpass filter, plus some IR LEDs 09-Apr-20 09:23 PM but.. I mean more for precision.. like sub micron 09-Apr-20 09:23 PM with range of a few micron 09-Apr-20 09:27 PM @noxz 09-Apr-20 09:27 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/15864928372304235671687887754941-3211F.jpg 09-Apr-20 09:27 PM I just knew it as capsense or gpio capsense 09-Apr-20 09:27 PM "Here that pin is protected from electrostatic discharge with the 1k resistors. The microcontroller takes a reading by measuring how long it takes the voltage to change on the input pin." 09-Apr-20 09:27 PM Basically you write a HIGH on the send then turn it to a high impedance pin.. such that the voltage just sits there 09-Apr-20 09:27 PM Then you keep reading with the input pin 09-Apr-20 09:27 PM Until it discharges "enough" 11-Apr-20 12:02 AM I burned through 30 coronavirus tests this week testing my device. I might have more coronavirus tests at home than anyone else in the world! 11-Apr-20 12:09 AM @piGuy IDT? 11-Apr-20 12:09 AM I'm sure parts come from IDT. 11-Apr-20 12:09 AM I just design the hardware, my coworkers do the assay development. 11-Apr-20 12:09 AM I know the primary assay developer made a custom polymerase and various other custom enzymes. It's all magic as far as I'm concerned. 11-Apr-20 02:55 PM @qualia can you flip the cold head emote? I want that checkmark effect 11-Apr-20 03:28 PM unfortunately that doesn't seem to flip past uses of it.. had to delete/recreate the emoji to change it 11-Apr-20 03:28 PM just pretend they're other-hemisphere checkmarks 12-Apr-20 08:11 PM Arrghh. Was all ready to do some glass work and the oxygen tank is empty. I am hoping the gas vendor is open tomorrow. I am assuming they are cause they are a critical business. They also do medical oxygen so I’m guessing they are open. Thinking maybe it’s time to step up from a 46 foot bottle. 12-Apr-20 09:32 PM I assume you mean cubic foot @Charles ? 12-Apr-20 09:32 PM Wee, got Ethernet run over to the garage, and a WiFi access point installed and running well! 12-Apr-20 09:32 PM Now to hook the FIB computer up, and start hacking on a Python based VNC controller 12-Apr-20 09:32 PM I think the first thing I'll start working to accomplish is automating image saving, then add on changing tilt... Then I should be able to make some decent "videos" 12-Apr-20 09:45 PM Yes. Cubic feet. Next step up is 80 but the bottle is actually not that much bigger. Higher pressure. 12-Apr-20 09:45 PM And my electric dryer died the other day. Have been line drying but the winds picked up so now troubleshooting it. Fortunatly they included a pretty good schematic/wiring diagram tucked inside. 12-Apr-20 09:45 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_7990-252E6.jpg 12-Apr-20 09:50 PM so nice when modern appliances still have schematics 12-Apr-20 09:53 PM Hmmmmm 12-Apr-20 09:53 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_7991-D270F.jpg 12-Apr-20 09:53 PM Well there is our problem right there. Now here is the big philosophical question. Having the equipment I have, do I actually spotweld and repair this coil or get a new one, or just buy a new dryer cause this one is pretty old anyways. 12-Apr-20 09:53 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_7993-9FD39.jpg 12-Apr-20 09:53 PM Judging by the look of it I would say it’s Kanthal. I could do a splice with Nickel in between. I will see if any appliance parts places are open first. 12-Apr-20 10:19 PM Just looked online. They are all closed. Ordered the element on amazon. Since prime is no longer fast shipping on non essential things it says it will take up to a week to get here. 12-Apr-20 10:27 PM appliance parts seem like they should be considered essential...guess you cannot expect logic out of something as big as amazon 12-Apr-20 11:04 PM I just ordered my dad shampoo on Amazon and it says it will be there in 3 days 12-Apr-20 11:04 PM I'm not sure that's any more essential than a dryer heater 13-Apr-20 01:02 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/PANO_20200413_005828-675DC.jpg 13-Apr-20 01:02 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/JPEG_20200413_010337-87A47.jpg 13-Apr-20 01:02 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/JPEG_20200413_010503-E0BED.jpg 13-Apr-20 01:02 AM Courtesy of the new garage WiFi connection 13-Apr-20 01:02 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/JPEG_20200413_010733-4E3B5.jpg 13-Apr-20 01:02 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/JPEG_20200413_010753-C1C42.jpg 13-Apr-20 01:02 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/JPEG_20200413_010832-5136B.jpg 13-Apr-20 01:02 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20200413_010908-F7C72.jpg 13-Apr-20 01:02 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20200413_010941-A0C95.jpg 13-Apr-20 08:29 AM What is that? 13-Apr-20 10:40 AM Plasma source 13-Apr-20 10:40 AM Bell jar with antenna wrapped around, antenna tuner box on top 14-Apr-20 03:27 PM https://www.healthimaging.com/topics/healthcare-economics/fda-clear-worlds-first-portable-mri I love when science companies have cool names 14-Apr-20 03:29 PM Is that permanent magnet based? 14-Apr-20 03:31 PM Presumably, it uses a single 110V plug 14-Apr-20 03:33 PM That’s what I was thinking. Their website makes reference to storing it in a closet as well so it’d have to operate at room temperature. 14-Apr-20 03:33 PM Wow 14-Apr-20 03:38 PM hyperfine tho 14-Apr-20 03:42 PM bet it's some compressed sensing black magicks 14-Apr-20 03:42 PM that's super cool 14-Apr-20 03:56 PM oh, maybe not compressed sensing specifically, but all kinds of MRI signal processing magicks nonetheless .. https://www.hyperfine.io/patent https://bmi.stonybrookmedicine.edu/node/663 14-Apr-20 04:00 PM I mean 14-Apr-20 04:00 PM all MRI stuff is signal processing magic 14-Apr-20 04:00 PM Yep 14-Apr-20 04:01 PM there's a reason there are constantly tons of "experimental" physics grad students who are really just doing data processing algorithms for MRIs and have never been in the same room as one 14-Apr-20 04:01 PM like particle physicists 14-Apr-20 06:24 PM This particular machine is hopeful. The company that made it pulled some shady shenanigans at CES2020 that the FDA decided to overlook. It's resolution is iffy even with image processing magicks, but if what you want to do is gross, quick diagnosis of TBI or stroke then here ya go. What it is, though they haven't been selling it as such, is a great triage tool. 14-Apr-20 06:24 PM They have a battery powered variant, that would go very nicely in a military field hospital or on the 50 yard line. 14-Apr-20 07:31 PM whatever remains of the american football industry after the world is done ending will probably have a field day with these things 14-Apr-20 07:39 PM "NFL accused of altering algorithm to hide trauma" can't wait for the headlines 14-Apr-20 07:47 PM Hush you. Stop trying to be the Lathe of Heaven. 15-Apr-20 02:25 AM @qualia I'm not too hopeful this will destroy the NFL, the SuperbOwl already happened, so it seems like there's probably a bunch of months before money making stuff starts again. I bet all the athletes can train a lot by themselves, at least strength wise. 15-Apr-20 07:40 AM https://imgs.xkcd.com/comics/thermometer.png 15-Apr-20 08:06 AM I made a shelf yesterday 15-Apr-20 08:06 AM before 15-Apr-20 08:06 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/DSC_1204-31142.jpg 15-Apr-20 08:06 AM after 15-Apr-20 08:06 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/DSC_1206-2EBC3.jpg 15-Apr-20 08:06 AM 1x4ft 15-Apr-20 08:06 AM I need a few more shelves to build, I think 15-Apr-20 08:12 AM looks nice, you should be proud of yourshelf 15-Apr-20 08:12 AM also wow, that's a keyboard 15-Apr-20 08:12 AM some variant of the model m? 15-Apr-20 09:07 PM it's an old mechanical Alps based keyboard.. the numpad has a toggle switch to use a small LCD screen calculator 15-Apr-20 09:07 PM Dirty 15-Apr-20 09:07 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/DSC_1211-BE711.JPG 15-Apr-20 09:07 PM the programmable keys come in handy enough 15-Apr-20 09:07 PM btw, next to that gear cutter, is a laser poniter diode - dead though 15-Apr-20 09:07 PM search focus keyboard on ebay (focus is the brand) 15-Apr-20 09:07 PM one for $110 USD top result.. that's not too bad 15-Apr-20 09:07 PM I am sure I got it for cheaper... because I got a 2nd one with the deal as well 15-Apr-20 10:03 PM oh my goodness 15-Apr-20 10:04 PM oh my 16-Apr-20 12:58 PM oh, looks very nice 16-Apr-20 12:58 PM but nothing for me, no proper arrow keys :< 16-Apr-20 12:58 PM (lefty here) 16-Apr-20 01:04 PM c'mon, it even has diagonal arrow keys (and judging by the grime on those, I dont use 'em much) 16-Apr-20 01:04 PM everyone should be using hjkl to move aorund anyways in files anyways 16-Apr-20 01:04 PM wasd is still valid if you are a gamer, imho 16-Apr-20 01:20 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/EVwAfGOXYAEyrpo-5DF7A.png 16-Apr-20 01:20 PM Non-optimized stepper controller for my XY microscope stage. 16-Apr-20 01:20 PM I may be designing a small board soon, for the heidenhain scales.. 16-Apr-20 01:20 PM differential ADC driver, maybe a dedicated ADC, and then likely a BLE module to report it all to a tablet based DRO 16-Apr-20 01:20 PM the main android DRO out there is not open source 16-Apr-20 01:20 PM I sometimes forget android doesnt always mean that 16-Apr-20 01:22 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/EVwAytuXYAI8M2X-D8D0F.png 16-Apr-20 01:22 PM Android DRO? 16-Apr-20 01:23 PM Yes 16-Apr-20 01:23 PM I want ot implement things like barcode scanning to keep record of what I am measuring w/ the microscope 16-Apr-20 01:23 PM and I've used ZXing library for that before 16-Apr-20 01:23 PM anywho, about to run to grocery store, there is no meat in fridge for dinner! 16-Apr-20 01:25 PM go, go, go! 16-Apr-20 02:03 PM got easter candy that was on sale 16-Apr-20 08:27 PM after my online quiz, I'll try to get a photo of some phone pixels at 150x soon enough.. 16-Apr-20 09:22 PM 150x pixels~ 16-Apr-20 09:22 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/DSC_1222-9196C.jpg 16-Apr-20 09:22 PM so happy to have accesories 16-Apr-20 09:22 PM a better camera thing would be nice 16-Apr-20 09:22 PM oh!!!! I completely forgot, since t his has a built in optical comparator thing.... I can easily stick a projector to that and beam down a pattern onto photoresist! 16-Apr-20 09:40 PM making a mount for that should be on my list 16-Apr-20 09:40 PM oh, well, I need to figure out what projector I'd want, first 16-Apr-20 11:11 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/2011-10-12_13-55-34_332-27935.jpg 17-Apr-20 12:07 AM 2011 macbook screen 17-Apr-20 12:07 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/89926641_2800779906669677_2392460980471726-D1D01.jpg 17-Apr-20 12:21 AM at what zoom? 17-Apr-20 12:21 AM slihgtly better chevron shot 17-Apr-20 12:21 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/2011-10-12_13-58-39_499-4CF66.jpg 17-Apr-20 12:21 AM still need to actually clean these optics 17-Apr-20 12:25 AM not sure, that's an 85mm lens on a bellows onto an APS-C sensor... Very different 17-Apr-20 12:34 AM do you have linear stages/fine adjust for position with that system, or just Z ? 17-Apr-20 12:34 AM I'd actually like to stick my AG-LS25 doing a few steps, under that micrscope and kind of verify how much/little it can go 17-Apr-20 12:47 AM that's handheld haha 18-Apr-20 12:05 PM I am looking around and realize I do not have an accurate milligram scale. Closest thing I have is a reloading scale that goes down to .1 grain measurements or about 6.5 mg per increment. Not enough resolution for what I want to do. I am measuring the weights is applied coatings to cathodes so I am defiantly way way down. I am planning on averaging like 10 at a time or something but does anybody have any thoughts or experience on the tiny stuff? I see some like cheap digital ones that read in .001 gram increments but like all other things are they really any good? I also don’t want to go down the measurement thought rabbit hole. I just want to consumer and but something and not worry about it. Although when some Swiss guys in the late 1800’s went down the time measurement rabbit hole and we got quantum math and physics as a result... Hahahaha 18-Apr-20 12:08 PM @Charles for such fine measurements, you'll want an enclosure to prevent air currents/drafts from affecting your measurements. For calibration, I'd get a 1-10 microliter micropipettor 18-Apr-20 12:08 PM They should be like $20 18-Apr-20 12:08 PM https://www.the-odin.com/pipette/ 18-Apr-20 12:08 PM You'll need some tips too, if you only want a couple, they're likely to send them for free if you ask before ordering 18-Apr-20 12:12 PM Also consider thermal variations. If you want to do a before/after mass you need to make sure temperature is not too far off. 18-Apr-20 12:13 PM Any thoughts on an actual scale? 18-Apr-20 12:14 PM Don't have any allegiance to a model/brand. I think they are all more or less the same? Some of the fancy ones have serial output 18-Apr-20 12:16 PM I have ancient scales that read to .1 and .01 mg.... 18-Apr-20 12:16 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/image0-ABC76.jpg 18-Apr-20 12:21 PM Yeah. I first searched for an old lab Oahus or other type and they are like unobtanium right now. So I guess I will just but one of these cheap digital ones until I stumble across the right one. 18-Apr-20 12:21 PM I have a pair of Mettler substitution beam balances. 18-Apr-20 12:23 PM Sprayed cathodes 18-Apr-20 12:23 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/image0-0B30A.jpg 18-Apr-20 12:25 PM if you are able to average, that should actually reduce your uncertainty more than going to a better scale 18-Apr-20 12:25 PM typically these super sensitive scales are made for measuring 1 thing at a time, your uncertainty goes with 1/N when you average 18-Apr-20 12:28 PM that's actually very smart 18-Apr-20 12:30 PM That’s what I have been doing so far. Been using 10 at a time. For my current purposes that has been ok. I am actually doing trending statistics to determine coating density to emission density relationship and also break down and aging characteristics. These are really the hard part of making inexpensive tubes. It’s why nobody in the US or Western Europe does it. It’s really hard frustrating work! 18-Apr-20 12:30 PM People really need to appreciate the low Chinese and former soviet tune companies, and the dirt cheap transistors and IC’s we enjoy. It really is a miracle of manufacturing 18-Apr-20 12:32 PM What's the coating? 18-Apr-20 12:32 PM These are triple carbonate. 18-Apr-20 12:32 PM Barium strontium and calcium. Cause of the barium you try to handle and spray as little as possible. It is rat poison after all!! 18-Apr-20 12:34 PM Is that like the Barium oxide dispenser cathode coating? Sorry if it is a stupid question. I know very little about that kind of things 18-Apr-20 12:36 PM Similar but now exactly the same. 18-Apr-20 12:37 PM What kind of current density do you achieve with those? 18-Apr-20 12:37 PM Dispenser cathodes usually have the barium held in a matrix. In traditional cathode and filaments the carbonates are milled to a specific form and applied in paint form. 18-Apr-20 12:37 PM Well as we speak it’s very low. Only about 10ma per centimeter I would estimate. 18-Apr-20 12:38 PM Right dispenser usually have tungsten foam or similar things 18-Apr-20 12:40 PM In this style of cathode the ability of the core metal dopeants to reduce the barium oxide to a surface layer of metallic barium determine the maximum attainable value and that is effected by many factors 18-Apr-20 12:40 PM Also different uses for the final part determine what you want to shoot for 18-Apr-20 12:40 PM So is that what is happening when you need to "activate" them? 18-Apr-20 12:40 PM BaO to pure Ba? 18-Apr-20 12:45 PM Multi step process. All done under vacuum. First heat to drive off gas. The cathode sleeve and filament can actually hold a large volume of gas. Then the residual vehicle and binder of the coating are driven off or reduced by heat. Then the carbonates thermally break down to oxides. That is left to stabilize for a bit, then the assembly is raised to a temperature far above normal operating temperature where upon reducing agents of the core metal reduce a small percentage of the barium strontium and calcium in this case to metallic form. 18-Apr-20 12:45 PM It’s like cooking a soufflé and you have to figure out the characteristics of the pan, oven, and ingredients of your specific situation to make it turn out just right. 18-Apr-20 12:45 PM A change in any one of the materials or temperatures or timings have great effect on the final product. 18-Apr-20 12:47 PM Ok I understand better why everyone is so vague about it now 18-Apr-20 12:47 PM We briefly considered switching to dispenser cathodes for a work project but ended up following k.i.s.s. 18-Apr-20 12:49 PM I have heard horror stories from old tube companies where the company that make the cathode nickel accidentally added too much manganese by a tiny amount and a multi million dollar warehouse full of tubes made with it had to be scrapped and this was in the 50’s 18-Apr-20 12:49 PM Dispenser cathode are actually far more consistent. Just hard to make. 18-Apr-20 12:49 PM This style lent itself to fast automated production and being able to churn them out by the millions. Once you set up the machines to make them right and built the fixtures you simply just never touched them again! 18-Apr-20 12:52 PM Until old guy retire and someone try to mess with it 18-Apr-20 12:54 PM I have correspondence from the owner of a friends company and a engineer from sylvania in the early 80’s discussing that very thing. They determined if they ran huge quantities and warehoused them if the need was great enough in the future they would just re tool. To their credit they were right. The remaining stocks did last a couple decades. They just did not anticipate audiophiles and hipsters! Hahahaha 18-Apr-20 03:12 PM I want to make more emotes - maybe a machining one and a lasers_and_optics one? 18-Apr-20 03:12 PM any suggestions? 18-Apr-20 03:17 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/250px-Portal2_ReflectionCube-95700.png 18-Apr-20 03:22 PM looks more like a companion cube than anything else 18-Apr-20 03:22 PM it's the laser variant of a companion cube 18-Apr-20 03:23 PM does anyone use those? 18-Apr-20 03:23 PM aperture does 18-Apr-20 03:23 PM is that a caged beamsplitter? 18-Apr-20 03:23 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/Grating-0DA29.png 18-Apr-20 03:36 PM The cube small would just look like an alien (with big eyes) 18-Apr-20 03:37 PM has no one here played portal? 18-Apr-20 03:37 PM yeah 18-Apr-20 03:37 PM back when it and 2 came out 18-Apr-20 03:37 PM haven't touched since lol 18-Apr-20 03:37 PM ohhhhhhhhhhhhhh 18-Apr-20 03:37 PM Discouragement Redirection Cube 18-Apr-20 03:43 PM https://media.tenor.com/images/d76d353de28f26d5c4ab51340a0feecb/tenor.gif 18-Apr-20 05:24 PM back to translating some of that German watchmaking book.. got a few paragraphs more 18-Apr-20 05:24 PM comparing who thinks a ship's swing from ocean wavess effect rate or not 18-Apr-20 05:24 PM given a gimbal/suspension on it 18-Apr-20 05:24 PM "Cardanic" (universal joint) is actually the term used there 19-Apr-20 04:35 AM Ayy, laser cube! 19-Apr-20 08:20 PM Does anyone know anything about this person? http://www.swissrocketman.fr/ 19-Apr-20 08:20 PM They have a ton of older lab lasers on their youtube channel 19-Apr-20 08:20 PM and lots of seemingly homemade diagrams of commercial laser systems? 20-Apr-20 02:59 PM How do I turn off the discord message about "links are spoopy"? I really dislike the word spoopy 20-Apr-20 02:59 PM It offends me 20-Apr-20 02:59 PM And the pop-up is just annoying and slows down my life 20-Apr-20 03:13 PM You don't, as discord is a happy happy fun fun kids to thats laid back and cool 20-Apr-20 04:41 PM I don't seem to recall the pop-up happening like 6 months ago 20-Apr-20 04:44 PM Yeah they added filtering later, due to shady links and those exploit ladden links designed to highjack accounts going around 20-Apr-20 04:49 PM Google shows it came in a few years ago 20-Apr-20 04:49 PM There's this setting which seems like it might be just for personal messages, but I can't tell https://amp.reddit.com/r/discordapp/comments/6dyq88/links_are_spoopy/ 20-Apr-20 04:49 PM After changing it, none of the links in here seem to give me the pop-up 20-Apr-20 04:49 PM But I only tried a few 21-Apr-20 04:19 PM https://www.youtube.com/watch?v=WuY2-OrT9ig Pretty neat 21-Apr-20 05:17 PM second part https://www.youtube.com/watch?v=8cNeAOpR-Ws 21-Apr-20 05:17 PM yeah, that's pretty cool! 21-Apr-20 11:04 PM for those that like free.. https://github.com/alexgand/springer_free_books 21-Apr-20 11:31 PM hilarious 22-Apr-20 06:17 AM a docker container for downloading links from an excel spreadsheet… 22-Apr-20 06:17 AM if not os.path.exists(os.path.join(folder, "table.xlsx")): books = pd.read_excel('https://resource-cms.springernature.com/springer-cms/rest/v1/content/17858272/data/v4') # save table: books.to_excel(os.path.join(folder, 'table.xlsx')) else: books = pd.read_excel(os.path.join(folder, 'table.xlsx'), index_col=0, header=0) print('Download started.') 22-Apr-20 11:14 AM the urge to write a tiny bash oneliner to solve this problem is extraordinary 22-Apr-20 12:01 PM There were only a handful of the majority that seemed interesting enough to download for me 22-Apr-20 12:01 PM It wasn't too bad to scroll and click on the reddit post which listed them all 22-Apr-20 02:11 PM Do you have a link to the post? 22-Apr-20 06:34 PM @rfs https://www.reddit.com/r/FreeEBOOKS/comments/g34xi5/408_free_ebooks_from_springer/ 22-Apr-20 06:34 PM Thanks! 23-Apr-20 09:56 AM https://www.instructables.com/id/Levitating-Side-Table-Made-From-Old-Cardboard-Boxe/ very cool 23-Apr-20 11:15 AM I have been trying to find an excuse to use tensegrity like those on project for a while. 23-Apr-20 11:31 AM Making one with chain would be fun 23-Apr-20 11:31 AM you could make a whole dinner table that way 25-Apr-20 12:33 PM You know what would be a good first step towards open access science? Authors actually including the main result in their abstract -_- 25-Apr-20 12:33 PM also LOL I was looking at what laser simulations exist on github (not a lot? even just pre-prepared ODE solvers with a GUI?) and found this: https://github.com/michaeledgar/laser LASER: Lexically- and Semantically-Enriched Ruby 26-Apr-20 10:51 AM Hahaha eBay says my $23 tig welder is being shipped 26-Apr-20 11:16 PM https://twitter.com/Orad/status/1254526660734521344 27-Apr-20 08:11 AM Already on #resources 27-Apr-20 10:17 AM Well not the Twitter thread 28-Apr-20 01:00 AM https://cdn.discordapp.com/attachments/513111119531999233/704601980454043748/image0.jpg 28-Apr-20 05:00 PM annnnd just got the email that my research is now curtailed indefinitely with the next update scheduled for may 11th. Until today the curtail technically ended may 1st. 28-Apr-20 06:00 PM Still waiting for a formal declaration like that on my end as well. 28-Apr-20 07:40 PM as of today we are expected to start back on campus on the 5th 28-Apr-20 07:49 PM My wife's manager brought up coming back and my wife was not too happy 28-Apr-20 07:49 PM I can only hope they continue supporting work from home regarding this whole thing for a long time 29-Apr-20 01:03 AM I asked my current dayjob why they were uploading zip compressed archives containing text files to github, and was informed they did it because they had been hitting the file-size limit of 100 megs before 29-Apr-20 01:03 AM (When I tried to git clone the repository, I aborted when I realised it was > 5 GB ) 29-Apr-20 02:39 AM oh no 29-Apr-20 02:39 AM mistakes are being made 29-Apr-20 02:44 AM Yeah… I'm scared of what other skeletons I'm going to find in this research lab's basement 29-Apr-20 07:33 AM @nmz787 how's the welding coming? 29-Apr-20 07:33 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20200429_085359-87A52.jpg 29-Apr-20 09:28 AM Are they uploading data?.... 29-Apr-20 10:37 AM @rdpierce got the wall plug installed and regulator hooked up last night 29-Apr-20 11:15 AM Fun!!! 29-Apr-20 11:15 AM I would expect that welder to be an EMF noise bomb. 29-Apr-20 11:15 AM The HF start, in particular. 29-Apr-20 11:15 AM But the IGBTs chopping AC aren't anything to sneeze at, either. 29-Apr-20 12:59 PM Seems the risk is really just the distance from the welding to sensitive equipment 29-Apr-20 12:59 PM Not so much being on the same circuit/power 29-Apr-20 12:59 PM As far as I can tell 29-Apr-20 12:59 PM The case of the welder is metal and has a ground lug they recommend to connect to it's own ground rod 29-Apr-20 12:59 PM (my FIB also has that, which I haven't hooked up) 29-Apr-20 12:59 PM A welding forum said to bundle the first few feet of ground and torch power together, presumably to couple the EM fields 30-Apr-20 10:06 AM this work-from-home thing is really driving into me how much the science paywall sucks :)))))))))))))))))))))))) 30-Apr-20 10:29 AM sci-hub ❤️ 30-Apr-20 10:30 AM ‍️ 30-Apr-20 10:43 AM scihub has been struggling with some spie and OSA stuff I've wanted 30-Apr-20 10:43 AM had to remote access a lab computer 30-Apr-20 10:45 AM Yeah it's blocked here, sadly 30-Apr-20 10:45 AM need to VPN 30-Apr-20 02:02 PM So has anyone here started playing with labview, now that there's a free version? 30-Apr-20 02:06 PM Oh they finally done it? I liked simulink and Matlab better, but I have very limited experience with LabView, but I'll check out the free version now 30-Apr-20 02:06 PM It says it cannot be used for academic purposes 30-Apr-20 02:07 PM https://www.ni.com/en-ca/shop/labview/select-edition/labview-community-edition.html 30-Apr-20 02:08 PM there is a free labview? 30-Apr-20 02:08 PM Seems fully featured too 30-Apr-20 02:08 PM Very new thing, yeah. 30-Apr-20 02:08 PM I haven't touched that spaghettis nest in years 30-Apr-20 02:09 PM It's very easy to use it poorly 30-Apr-20 02:09 PM oh yes 30-Apr-20 02:09 PM Honestly biggest thing for me was the easy UI making 30-Apr-20 02:11 PM boolean logic and loops / cases are very nice in it 30-Apr-20 02:14 PM I remember liking state machines, and streamed data 30-Apr-20 02:28 PM Hmmm.... I have heard EPICS is integrated with LabView. 30-Apr-20 10:50 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/Screenshot_20200430-225008-1D70C.png 30-Apr-20 10:50 PM This guy does not look old enough to be touting Eminem 02-May-20 06:57 PM What do you guys think Thorlabs spends in anodizing each year? 02-May-20 06:57 PM Their stuff is very pretty. 02-May-20 09:24 PM not sure what sort of facilities they have but not much if they do it themselves 02-May-20 09:24 PM main cost would be paying someone to run the baths 03-May-20 05:19 AM I really don't know where to find the answer to my question on the internet, so I'm asking here : Does it exist an off-the-shelf household power inverter that simultaneously take power from both the grid and the battery? 03-May-20 05:19 AM The use case is that, my house is about 1km away from the 220V transformer, so the line voltage drops significantly when we use the air conditioner and water heater, often causing temporary blackout when the voltage drops too low. 03-May-20 05:19 AM My idea is to have a system that primarily takes power from the grid, but as the power requirement increases, starts taking power from batteries. 03-May-20 10:03 AM Isn’t that exactly what a good uninterrupted power supply would do ? 03-May-20 10:53 AM A good on-line ups? 03-May-20 10:53 AM Many cellphone basestations also have powersupplies that also have charging logic 03-May-20 10:53 AM So that they can be run in parallel with the -48V batteries. 03-May-20 10:53 AM And thus ensure absolutely no interruptions with interminient power. 03-May-20 10:55 AM Also boats 03-May-20 11:30 AM @Dalai Llama your line voltage might just use a boost to 240V, you'd only need a 20V increase and could use a boost configuration rather than step-up http://sound.whsites.net/articles/buck-xfmr.htm 03-May-20 05:48 PM @funranium these things are like $3000 and have been around for like a decade, I wonder if they're the closest thing to a turn-key "vr goggles as laser goggles" system: https://www.nasa.gov/vision/earth/technologies/jordy.html 03-May-20 05:48 PM nasa link because everything else about them seems infomercially... https://www.enhancedvision.com/low-vision-product-line/jordy.html 03-May-20 06:23 PM @nmz787 I actually have a voltage stabilizer that automatically adjust the voltage to 220. However, the machine has a 140V minimum cutoff, so when the line voltage drops below 140V, which happen often during summer, the machine shuts down the power for a few seconds. 03-May-20 06:23 PM But it looks like on-line ups only switches to battery power if the grid is down? 03-May-20 06:35 PM Grid being down is probably voltage related, just my guess 04-May-20 11:23 AM favourite physics article of the week: https://physics.aps.org/articles/v13/70?utm_campaign=weekly&utm_medium=email&utm_source=emailalert 04-May-20 11:35 AM @idmb They work for given values of you should sit down for a while before walking, much less driving, to re-equilibrate your inner ear. Or perhaps I'm a bit sensitive to those perceptual shifts. 04-May-20 11:38 AM But with nearly two decades of working on them with healthcare funding, surely they’re pretty good now? 04-May-20 11:45 AM "...and don't call me Shirley" Can't resist. The telemedicine units I've seen, but was definitely not allowed to touch, are small, lighter, and have great image quality. Docs were still quite clear that it was an acquired skill much like getting sea legs. Also, if anything they're more expensive now. 04-May-20 12:04 PM hmm 04-May-20 12:04 PM soon ™️ 04-May-20 01:02 PM I mean, they're more expensive because extra snazzy and also Health Care Cost Bloat, but they exist. That's the important part. 04-May-20 02:24 PM I'm not sure what prompted the telemedicine discussion... But I pretty much practice that with an ER doctor friend of mine over google Hangouts 04-May-20 02:24 PM Both texts and video chats 04-May-20 02:46 PM vr goggles with cameras for laser safety goggles 04-May-20 02:46 PM some have existed way longer than vr gaming has been "popular" 04-May-20 06:48 PM the 'don't drive after VR' thing is extremely real 04-May-20 06:48 PM i took to it like a fish out of water and still have weirdly emotional pangs about still not yet having a VR headset + some kind of sketchpad i can build and experiment with things in in VR-space 04-May-20 06:48 PM ... but it still leaves my sense of balance and depth perception all caterwonkus after 04-May-20 07:59 PM I bought one of the oculus rift a few years ago and barely ever used it... Too many other distractions/projects to try and build interesting utilities for. I'm not much of a gamer, so never played anything on it that wasn't just a simple demo program 04-May-20 08:15 PM I don't know if newer attempts are better, from what I've heard they are, but I wasn't overly impressed with Oculus' dev kit 2. The low screen resolution was distracting and movement generally just caused vertigo 04-May-20 08:15 PM Especially half life 2 04-May-20 08:15 PM That game makes you want to puke 04-May-20 08:15 PM I have denied every opportunity to try VR 04-May-20 08:16 PM Not that their camera was designed for VR, but oof 04-May-20 08:16 PM I want to wait until everyone thinks it's good 04-May-20 08:16 PM so as not to be disappointed 04-May-20 09:54 PM Hmm I played around a bit with an ordinary Cardboard headset a while ago 04-May-20 09:54 PM I also managed to get Trinus to run PC games through it 04-May-20 09:54 PM Cheap experiment. Headset was frustrating, though-- the stabilizing clamps tended to bump the power button on the Android phone. 04-May-20 10:09 PM I thought the hardware was fine, just lacked any/good CAD apps 05-May-20 05:45 AM I recently did 5hours of Half-Life: Alyx in VR and it was nice 05-May-20 05:45 AM And yeah not really that much good CAD stuff out there. Especially anything cheap/free 05-May-20 05:45 AM The Oculus Rift CV1 that I used was annoying in the way that I could not fit glasses underneath it. SO everything was kainda fuzzy. 05-May-20 05:45 AM Still very playable tho 05-May-20 03:21 PM I meant half 2. I'm sure Half-Life Alyx is fine because it's actually a VR game, but in Half Life 2 you walk really, really fast and are leaned forward a lot. It's not obvious on a monitor, but in VR it's just blech. 05-May-20 10:04 PM Does anybody know at what temperature titanium sublimation pumps vaporize the titanium at? Trying to determine if it can be down with induction heating or tungsten filament is the only practical way. Thinking about using it as an alternative to batalum getters where NEG’s are not a practical option. Also it will still have a pretty flash. 05-May-20 10:04 PM Generally on a nickel substrate you can RF heat to a middle yellow, but any more and the substrate itself starts melting or evaporating. 05-May-20 10:04 PM Might try magnesium in some sort of shielded container to keep it from migrating at high operating temps. 05-May-20 10:28 PM The only one I have seen used a titanium filament but that does not really answer your question about induction heating 06-May-20 12:16 AM Well it seems the Amazon.com shipping delays are over... I got door hinges delivered with free next day shipping 06-May-20 12:41 PM https://www.youtube.com/watch?v=zcpDGKH9_SE 06-May-20 12:41 PM Neat video but a bit long winded 06-May-20 01:24 PM oh no oxygen /o\ 06-May-20 01:25 PM rip that pump 06-May-20 01:52 PM i like this guy's videos and do not want him to explode 06-May-20 01:52 PM (but also i am glad youtube has video speed controls) 06-May-20 01:57 PM 2x on all the things 06-May-20 02:02 PM even music? hardcore 06-May-20 02:07 PM no, that would be speedcore then 06-May-20 02:19 PM .. okay fine 06-May-20 04:30 PM @Charles I posted this to #resources a while ago-- it contains that information: https://www.rbdinstruments.com/blog/homemade-titanium-sublimation-pump/ Simple titanium sublimation pump build. 06-May-20 04:30 PM Induction heating in vacuum may work. Just needs to be supported by a suitable refractory material. The sublimed layer is unlikely to be sufficiently RF opaque unless it becomes fairly thick. 06-May-20 04:30 PM Planning to use it for a getter flash in a tube? 07-May-20 07:16 AM Correct. Barium getters are becoming hard to get as SAES said they are stopping production and the Asian sources are not returning my emails. NEG’s are not suitable for small receiving type tubes. I have some titanium wire and will begin this weekend experimenting with moly and tungsten rings with the titanium wrapped around them. Also yesterday I experimented with just drawing current through the titanium. With proper timing and RF current control it may be possible to use titanium alone. 07-May-20 09:11 AM Total speculation but maybe you could toss a small very thin coil of titanium wire up in the top of a tube and mounted between two pins that do not normally connect... Heat the wire to evaporate it onto the glass. Just gotta make sure you heat it enough that you really get rid of the wire effectively so there is not an unintended connection. May be more of a hassle than getting the RF/induction heating working 07-May-20 09:45 AM I already have the RF heating equipment for making large quantities of vacuum tubes. I would like to keep the same form factor. 07-May-20 11:39 AM Still trying to figure using a projector for photolithography through my new/old microscope while also still having a camera setup as well for location verification.. not sure if possible though 07-May-20 02:21 PM Beam splitter or diverter 07-May-20 02:21 PM Extra machining of the adapter tho :/ 07-May-20 08:12 PM General frustration level with Apple right now... I have been trying to post a video to you tube from my Mac and it just slowed to a crawl because I had not installed the new OS update. Apple does that. If you go too long they start screwing with you. Then after the update everything else wants to update, but if you are close to full on your iCloud account they bug you about that! Is there a good free/open source Linux editor with YouTube in mind? 07-May-20 09:12 PM Shotcut is fine, but buggy. 08-May-20 12:18 AM I use avidemux 08-May-20 05:59 AM I have likewise met with no success obtaining barium getters. Am getting closer to having the sort of compact closed-end quartz tube vacuum furnace necessary to make my own reactive alloys though. 08-May-20 05:59 AM What I would really like to be able to do, though, is make the alloy in the vacuum furnace and then use a hydraulic press and wire extrusion die to turn it into solder. Compact presses are generally pretty available, but I'm having difficulty finding a wire extrusion die that excludes atmosphere reasonably well. 08-May-20 05:59 AM Companies like S-Bond use 'active solders' containing titanium, magnesium, etc to solder even better to ceramics 08-May-20 05:59 AM I guess I could just put a solder pot in a glovebox though 08-May-20 05:59 AM Still need better purity nitrogen generation. These applications impose a pretty heavy argon usage rate and I really dislike going out to get cylinders refilled. 08-May-20 05:59 AM Nitrogen isn't good enough for lithium, but it's fine for most things 08-May-20 05:59 AM As long as they don't get too hot 08-May-20 08:18 AM I would avoid working with metallic barium if I could. It’s just too toxic in metal form. Batalum alloy is ok, but over time (many years) it will begin to shed and release its components. I know it’s not a problem unless you have tins of getters laying about but at the bottoms of the cans you get a lot of barium dust at the bottom. Not safe. It’s why they have shelf lives. They will still work. I have ones over 40 years old that still flash fine. They just begin shedding. 08-May-20 08:18 AM I am going to place an order with SAES for a few cans to last me several years but want to come up with an alternative. Lithium holds some promise as well, but titanium would be the most stable. 08-May-20 01:58 PM hrm, yeah, a beam splitter is what I'd be looking for.. the projector would also need either a collimator lense or reduction - but we're not there yet.. I think the first thing to tackle would be to decide on a camera thing that fits, and get that going 08-May-20 01:58 PM though, inserting a beam splitter where the current mirror is would place the camera out of the body - thus giving me more leighway on size/options on the camera 08-May-20 01:58 PM existing mirror 08-May-20 01:58 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/DSC_1356-B5248.jpg 08-May-20 01:58 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/DSC_1357-EE6E4.jpg 08-May-20 01:58 PM fairly large mirror.. compared to commercially made/available beam splitters.. also not 45 deg 08-May-20 02:29 PM Without really getting the purpose, beamsplitter sounds like not what you want? aren't you scrounging for signal? 08-May-20 02:30 PM I want to stick a digital camera where that mirror is and display it on a tablet.. first thing, second part - I would also like a projector to beam (from the front?) of a pattern for photoresist 08-May-20 02:30 PM so, I need the mirror for projection 08-May-20 02:31 PM But isn't toggling between the two what you want? not both simultaneously? I don't know what types of intensity you need for the photoresist, what % of the light were you thinking? 08-May-20 02:31 PM but yeah, if a camera mounted above, then beam splitter should be okay? 08-May-20 02:31 PM I dont have any numbers 08-May-20 02:31 PM a piece of glass is like a 99-1 splitter 08-May-20 02:33 PM initially, this is a microscope setup not PR exposire.. so I'd like to think I'd want more transparency at the start 08-May-20 02:33 PM and toggling may work fine.. again, kinda just randomly going in my head about it 08-May-20 02:33 PM it's more so: I want to buy a camera to test out the capture - sooner than later 08-May-20 04:26 PM I wonder what the record for # of turbopumps in series is 08-May-20 04:26 PM 2 is not uncommon, but I have never heard of 3. 09-May-20 10:30 AM People: if you were given a giant vacuum system and it came with a "manual" explaining stuff about it, what are things you'd want in it that might not be? 09-May-20 10:30 AM #1 thing I've found lacking is people not including part numbers on things that don't have labels on them. 09-May-20 01:59 PM As a user I like to have rough ideas on how fast pump down usually is 09-May-20 01:59 PM For example after 1h you should reach 1e-5 mBar or something 09-May-20 01:59 PM Help to catch leaks 09-May-20 03:11 PM a list of fasteners and consumables with part numbers AND physical specs (in case the part number no longer exists) 09-May-20 03:58 PM You want a beamsplitter if you want to do realtime feedback on projector focus 10-May-20 06:02 AM Didn't even think of using lithium. I have a decent number of metallic lithium pellets on hand and it works for nitrogen at room temperature. 10-May-20 10:07 AM Hey @Addison-110m I saw on twitter that you were doing satellite radio communication? 10-May-20 10:07 AM Yeah 10-May-20 10:08 AM I’m interested in that. At Adler, we have a ham rig for that purpose, with a highly directional antenna and alt/az tracking. 10-May-20 10:08 AM Intended to be downlink and uplink for CubeSats. 10-May-20 10:09 AM Had been trying to pick up a few satellites that have died and come back to life after the batteries short circuited 10-May-20 10:09 AM That sounds like a really nice system 10-May-20 10:10 AM Oh that sounds fun. 10-May-20 10:10 AM Not much luck yet though. Local noise plus probably subpar cable 10-May-20 10:10 AM I’ve made a couple contacts on the FM ham radio satellites though. That’s been cool 10-May-20 10:23 AM Two way? 10-May-20 10:23 AM Don’t you have to account for Doppler shift through your contact? 10-May-20 10:23 AM Ok, fun aside, my girlfriend tells me she’s starting a new shopping list and it’s on Sedan Crater. 10-May-20 10:23 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/image0-E530F.jpg 10-May-20 10:25 AM For FM at least you just have to adjust the higher frequency part every so often. 10-May-20 10:25 AM Doppler shift isn’t significant enough at VHF frequencies to have a huge impact 10-May-20 10:25 AM And yes, two way 10-May-20 10:27 AM We got to see Sedan Crater 10-May-20 10:28 AM Oh wow 10-May-20 10:28 AM Just the public bus tour. 10-May-20 10:28 AM Unfortunately our guide took a busted camera so the Sedan Crater group pics didn’t turn out. 10-May-20 10:28 AM She also sent me to the store once with a shopping list that said 0.6 uSv 10-May-20 10:30 AM Oh darn. And why? 10-May-20 10:30 AM About the 0.6 μSv 10-May-20 10:31 AM She wanted me to buy a half dozen bananas. 10-May-20 10:31 AM Amazing 10-May-20 10:34 AM She has a shirt that says on the front and on the back. 10-May-20 11:32 AM @rdpierce There is an open source/volunteer base station network for cubesats and such 10-May-20 11:32 AM can't remember the name right now 10-May-20 11:32 AM Found it https://satnogs.org/ ! 10-May-20 11:34 AM I've heard about this. I think Adler Planetarium will want to become part of it. 10-May-20 11:34 AM We are still trying to get our setup working. 10-May-20 11:36 AM Nice thing with this one IIRC is that you can actually decode some of the data you recieve 10-May-20 11:36 AM also the collaborative aspect is nice. 10-May-20 04:00 PM https://twitter.com/atomicmuseum/status/1259553161255063552?s=21 10-May-20 04:00 PM Someone’s got a weird sense of humor.... 10-May-20 08:17 PM Does anybody have a calibration/testing lab for vacuum gauges? Mostly interested in ion and thermocouple. Have an idea for a design but it’s gonna need a real lab for testing. Preferably NIST traceable. 10-May-20 08:17 PM Somebody must do it. 10-May-20 09:26 PM I share an office with these guys: https://iopscience.iop.org/article/10.1088/1681-7575/ab7170 so they kinda do the opposite 11-May-20 08:44 AM Wow. Yeah not exactly what I’m looking for! Hahahaha. 12-May-20 06:10 AM are there any good COMSOL resources besides videos/guides that COMSOL produces? 12-May-20 09:07 AM Thanks to The Pandemic ™️ I no longer have income, but projects still need to be paid for! I have decided to create a Patreon page, if you enjoy my content feel free to support me, every bit helps a lot All of my content will stay free for all! https://www.patreon.com/GigaBecquerel 13-May-20 03:06 PM @Nixie you made hackaday for your wire joiner... But oddly they called it a welder even though you used solder :p 13-May-20 08:04 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/DSC_1390-91460.jpg 13-May-20 08:04 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/DSC_1392-39916.jpg 13-May-20 08:04 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/DSC_1396-64765.jpg 13-May-20 08:04 PM tacos 13-May-20 08:06 PM Taco metrology. Love the Mitutoyo! 13-May-20 08:06 PM NIST-traceable tacos. Duly noted. 13-May-20 08:16 PM Yes! 13-May-20 08:16 PM but mostly showing that they are thick.. kinda crispy on outside, but pretty soft on inside 13-May-20 08:16 PM one of the few taco shells that can actually soak up sauce that spills 13-May-20 08:16 PM kinda. it still doesnt actually absorb too well - bu t it is a substantial part of the meal 13-May-20 08:16 PM not a thin hardly noticeable amount of corn 13-May-20 08:28 PM I’m actually not a fan of corn tortillas. Now a flour tortilla burrito, on the other hand.... 13-May-20 08:58 PM fresh corn tortillas = excellent prepacked corn tortillas = terrible 13-May-20 10:54 PM this was 1/2c corn meal, 1/2c flour, salt, egg yolk, and water 13-May-20 11:06 PM I found a good compromise are the raw tortillas in the store. Tortilla land is one brand. You must cook them first. They also keep longer in their raw form in the fridge. 14-May-20 01:04 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/ebaa0313ab36a52dbfd6c03bf83a1182258e2048ee-890FE.gif 14-May-20 08:31 AM @nmz787 I didn't use solder, only flux. It's a welder, explosive, but welder. 14-May-20 08:31 AM Hackaday publishes everything, it's not a merit to be in there. 14-May-20 08:31 AM I think it's my...don't know, sixth time already. 14-May-20 11:26 AM Oh, huh, they said solder paste 14-May-20 12:34 PM UBC science officially online-only in the fall except for a few select lab courses yet to be announced 14-May-20 07:01 PM ...I don't even know what made the bot angry there. Anyway, I hope we do the same. It's surprisingly well contained atm, but if 38k people from everywhere come in August, it's going to be bad. 14-May-20 07:01 PM Or god forbid they decide to do in person football which they easily could if the CDC doesn't step in 14-May-20 07:20 PM The bot has a light trigger finger when it comes to swearwords. 14-May-20 08:38 PM What's weird is that I'm pretty sure what I just posted there is what I posted before except in one message. 14-May-20 08:38 PM I guess I fatfingered something that was a swear 14-May-20 11:49 PM Oh nice jig. I built a spot welder a while ago using an automotive audio supercapacitor and something like this would be useful. 15-May-20 09:55 AM anyone else get super targeted ads ? 15-May-20 09:55 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/unknown-01260.png 15-May-20 09:55 AM but not for stuff you'd ever actually... buy? 15-May-20 09:55 AM I got an ad for a rectangular beam aperture 15-May-20 09:55 AM I don't even know what you'd do with that 15-May-20 09:56 AM I see lab equipment and analytical equipment for sale occasionally, but it’s always for cannabis 15-May-20 09:57 AM well the ebay or amazon listings make sense in a way 15-May-20 09:57 AM but when it's specific companies 15-May-20 09:57 AM I just feel bad that their advertising budget is going towards showing me ads 15-May-20 10:30 AM https://www.youtube.com/watch?v=A-dBLQ8yPJY My god this guy has done some questionable things but this is just beyond stupid 15-May-20 11:26 AM Oh. Oh my. 15-May-20 11:29 AM Yep 15-May-20 11:29 AM I've been on-off watching his channel some time now, I would have expected just a bit of a warning 15-May-20 11:29 AM and maybe less sitting in a car 15-May-20 11:35 AM I was hoping the video would break into a discussion of oxygen deficiency monitors and how they work. 15-May-20 11:36 AM yeah just something like that 15-May-20 11:36 AM not him sitting in a down stream of the stuff 15-May-20 12:05 PM Well I'd rather huff CO2 than polyethylene glycol or whatever it is... But also having an oxygen monitor seems prudent for an actual production/event 15-May-20 12:05 PM I've taken a few huffs of CO2 from a soda fountain machine before, and it's quite obvious to your lungs/nervous system... But that was at concentrations near 100% 15-May-20 12:05 PM After reading about this decades ago https://en.m.wikipedia.org/wiki/Carbogen 15-May-20 12:10 PM mmm, Artificial Suffocation 15-May-20 12:10 PM Yeah, it's pretty wild 15-May-20 12:10 PM I thought I was playing/living super mario bros (NES version) 15-May-20 12:10 PM Very fleeting 15-May-20 12:10 PM Like 30 seconds 15-May-20 12:10 PM Just saw on Facebook last night someone posting an "article" about hypoxia with facemasks, and I had to call b.s. 15-May-20 12:10 PM Seems like way too little dead volume to be of any worry 15-May-20 12:10 PM And also, in any significant concentration your lungs and brain tells you something is up 15-May-20 12:10 PM /me thinks CO2 smells like ginger ale 15-May-20 12:15 PM good ginger ale should trigger the suffocation reflex if you get your nose in there good imnsho 15-May-20 12:15 PM vernors was my east-coast-US-self transfer standard for the longest time but i suspect there are Superior Alternatives lurking in the distance 15-May-20 12:21 PM Fountain ginger ale seems the most effective for me, but it could be the places I had accustomed myself to had the co2 mix turned up 15-May-20 01:19 PM I wish. A while back I got an ad for Thailand real estate. In Thai. 15-May-20 01:28 PM https://www.youtube.com/watch?v=FKG4-RlQCS8 Now that's a chamber 15-May-20 02:10 PM from experience, if you start hyperventilating with a face mask, it's going to be extra unpleasant because of the restricted airflow. 15-May-20 02:33 PM Preeeeeeeeeeeety 16-May-20 07:27 AM I was at an ATC event, and they played audio of a pilot climbing with broken pressurization. You can hear the dramatic increase in cognitive impairment and there’s complete obliviousness, on the pilot’s end, to the danger. 16-May-20 07:27 AM Fortunately the controller was also a pilot, realized the pilot was suffering from hypoxia, and ordered the pilot to descend in simple terms, and the pilot complied. It was like flipping a switch. The pilot got his wits back. 16-May-20 09:09 AM It's a more controlled environment, but this video shows that too 16-May-20 09:09 AM https://www.youtube.com/watch?v=kUfF2MTnqAw 16-May-20 09:10 AM What FL did he start getting effected at? 16-May-20 11:18 AM Don't know on that video but IIRC from my glider days oxygen is compulsory above 3000m msl 16-May-20 11:18 AM so ~10k feet? 16-May-20 11:18 AM oh you were asking rdpierce. my bad 16-May-20 12:04 PM It’s been years. I don’t recall. Definitely well above 100. 16-May-20 12:04 PM FAA requires oxygen for crew if above 12,500 ft for 30 mins or 14,000 for any time. Passengers need oxygen at 15,000 ft. 16-May-20 12:04 PM Technically, FL is not used until FL180, everything below is feet. 16-May-20 02:09 PM I’ve fallen down a new rabbit hole. 16-May-20 02:09 PM Learning about diode transistor logic. 16-May-20 02:09 PM I’ve got a board assembly from the Saturn V Launch Vehicle Digital Computer. 16-May-20 02:09 PM Pouring though early 1960s IBM docs. 16-May-20 02:09 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/image0-007B9.png 16-May-20 02:09 PM Dual quad-and gate with resistors and diodes. Cool stuff. 16-May-20 02:09 PM Although the way these get chained together is not counterintuitive. 16-May-20 02:22 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/image0-6E6C9.jpg 16-May-20 03:13 PM I've been up to 17k ft and didn't notice anything, but I took it slow getting there walking over about 2 weeks 16-May-20 03:13 PM "play high, sleep low" is the mantra for when you're training for mountaineering... But I just took it slow and steady 16-May-20 03:13 PM I had anti mountain sickness pills with me, forget the chemical name, there was another guy who was obviously sick and I gave him one or two and said he needed to descend... Saw him higher the next day and facepalm 16-May-20 03:13 PM It was just about to be over the pass tho, so he was going down soon either way, but could have had some serious damage in his brain or lungs 16-May-20 04:53 PM 12.5k and 14k FAA rules match practical experience 16-May-20 04:53 PM Skiing becomes noticeably more strenuous above about 10k and especially above 11k, just as one example. 16-May-20 08:27 PM I have never been above 10.5 without being in an airplane. The sky was so clear it almost had a slight shift towards violet. I miss hiking trips in the sierras but my feet knees and hips can’t do it anymore. 16-May-20 11:04 PM South Pole Station taught me the joy of "physiological altitude". Depending on the weather, the 9300' altitude felt anywhere from ~8700' to 11000'. Part of the physical qualifications for everyone wintering over was being sent to a wilderness center outside of Leadville, CO to see how you coped with 12000'. Quite a few people washed out there. 17-May-20 05:13 AM https://www.youtube.com/watch?v=Hsqh098nqIM How many physicists does it take to install a TMP 17-May-20 09:11 AM To be fair they are doing a little more than that! 17-May-20 10:46 AM @rdpierce hey no-one's allowed to talk vintage IBM in this server without pinging me >:( lol 17-May-20 10:46 AM Very cool that you have a Saturn V board though! 17-May-20 10:46 AM but yes hehe SLT logic was veryyy primitive but a very high yield mass production process for the time 17-May-20 10:46 AM Diode/resistor and SOMETIMES transistor logic :) 17-May-20 10:46 AM they did a LOT with just diodes and resistors though 17-May-20 11:07 AM I know. It takes some getting used to. Things like “They tied the outputs of these two and gates together, only one is powered, and one of the inputs is being used as an output? WTAF?” 17-May-20 11:07 AM Not to mention a lack of ground, and they would save power by only powering the chip when needed. So you have weirdness like seeing clock lines go the chip’s power. 17-May-20 11:09 AM watched the westworld movie last night, liked the use of banana plugs 17-May-20 11:09 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/Screen_Shot_2020-05-16_at_7.10.36_PM-7B7BC.png 17-May-20 11:51 AM Westworld rocks. 17-May-20 11:51 AM Wait... Movie? I thought you were talking about the HBO series. 17-May-20 11:51 AM Simone Giertz did a build for HBO and it's really funny if you've seen S1 and can get the references. 17-May-20 11:51 AM https://youtu.be/_u9jjcbgMpk 17-May-20 12:25 PM the original story is from 1973 17-May-20 12:25 PM the "spared no expense line" from jurassic park (1990) is in it lol 17-May-20 01:51 PM @funranium wow I had no idea there was such high altitude in Antarctica 17-May-20 02:36 PM https://www.latimes.com/world/la-fg-buzz-aldrin-20161203-story.html 17-May-20 02:36 PM I’m having a hard time wrapping my mind around this. I’m thinking about density altitude, which is a function of temperature. Cold temperatures = lower density altitude which is why naturally aspirated piston aircraft engines perform better and wings generate more lift on a cold winter day vs. a hot summer day. 17-May-20 02:44 PM Umm "Aldrin is now focusing on getting back to his home in Satellite Beach, Fla." 17-May-20 02:44 PM He was 86 17-May-20 02:44 PM Yes, it’s higher up, but I’d think the cold temperatures would offset the altitude. 17-May-20 02:44 PM That seems to sum it up pretty well IMO 17-May-20 02:44 PM Idk, Everest is always cold 17-May-20 02:44 PM And always challenging 17-May-20 02:44 PM I'd say it depends on how much acclimatization he'd been doing 17-May-20 02:44 PM It sounds like he took a quick plane ride 17-May-20 02:44 PM So probably not much 17-May-20 02:46 PM South Pole = 9300 ft above sea level. That’s nothing compared to Everest. 17-May-20 02:46 PM People get sick going up 3k ft 17-May-20 02:47 PM I’m seeing sources that say 9300 feet at the South Pole feels like 11,000 feet. That’s the part I don’t understand. 17-May-20 02:47 PM /me was reading about this when I forgot my anniversary trip was at 6k ft and we had a newborn 17-May-20 02:49 PM Oh, no, I understand why he got sick. I am just having a hard time understanding how South Pole elevation is worse than the same elevation elsewhere if the temperature is colder. 17-May-20 02:49 PM Cold air = more dense = higher partial pressure oxygen, yes? 17-May-20 02:51 PM I was actually just mulling over that re moisture last night and not intuitively able to reason things 17-May-20 02:51 PM Oxygen is only part of the equation though I think 17-May-20 08:53 PM To explain the physiological altitude, you more or less have atmospheric thinning at the poles due to the planetary spin, much like it is bulges at the equator. There also isn't really much weather at the South Pole but the pressure changes are very noticeable as the katabatic winds change. @nmz787 On average, most of the Antarctic continent is higher in elevation than the all the rest in the first place and then you slap a giant ice sheet on top of the plateau. As my shirt from there says "2" of powder, 2 miles of base.' 18-May-20 03:29 AM have I ever mentioned just how big iso 250 is? 18-May-20 03:29 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/unknown-ABC9E.png 18-May-20 08:37 AM ISO 250-f is bigger tho 18-May-20 08:39 AM eh, the only difference is the flange itself, the tube ID is the same 18-May-20 09:25 AM that's substantial, it adds nearly 4" of OD! and it's typically thick stainless 18-May-20 09:26 AM yeah, but it only adds to the flange, not the chamber itself 18-May-20 09:26 AM it doesn't add more useable vacuum volume is what I mean 18-May-20 09:28 AM it would make your photo quite a bit more uncomfortable though 18-May-20 09:54 AM I'll happily dm you my address if you send me the same part with iso-f 18-May-20 12:14 PM https://www.youtube.com/watch?v=RFch5OUi3yk The terrible sound you never want to hear when working on a turbine 18-May-20 12:22 PM that's a pretty cool beat tbh 19-May-20 10:18 AM so yeah, I may ask you guys to do xray dispersive spectrometry for small parts inthe future.. they were unable to do the LECO test because the parts were too small (we went into it with both sides knowing it was small) but the downcharge after discovering that simply wasnt enough to be like: oh I'm only paying for one test now.. certainly still seems like I paid for 2 19-May-20 11:59 AM He used a JEOL Superprobe JXA-8900RL 19-May-20 11:59 AM gave a nice procedure for it all too, for anyone interested 19-May-20 11:59 AM I'd be happy to share the report, too.. seems decent quality 19-May-20 11:59 AM screw was 0.40% carbon, pinion was 0.51 20-May-20 03:07 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/unknown-9F038.png 20-May-20 03:07 PM just attended a virtual physics conference with @Mezmorizor where everyone has miis and can wander around 200+ attendees, it actually worked 20-May-20 03:08 PM I was expecting it to be much worse honestly 20-May-20 03:08 PM impressive! 20-May-20 03:09 PM Yeah any complaints I would have are either things easily and probably fixed in software updates, or just because with this specific conference the talks weren't really curated 20-May-20 03:10 PM They do need to fix how high trust it is too. It worked out this time, but it's too easy for one bad faith actor to ruin the entire section 20-May-20 03:10 PM Though I guess the moderators had kick powers? 20-May-20 03:11 PM Oh for sure 20-May-20 03:11 PM Doesn't stop bot farms though, and I don't think they even had captcha 20-May-20 03:11 PM Not that captcha does much nowadays 20-May-20 03:12 PM I just doubt there's an easy way to select who to kick 20-May-20 03:12 PM like you'd have to scroll through the list of names (or search by typing) or click on them as they run around 20-May-20 03:12 PM Yeah 20-May-20 03:12 PM so it's a couple seconds before the ban, minimum 20-May-20 03:12 PM It's also just, people shouldn't be able to go on stage and spam dance 20-May-20 03:12 PM It's just not something that should be possible if you, the coordinator, doesn't want it to be 20-May-20 03:13 PM I mean maybe they can't 20-May-20 03:13 PM nobody tried 20-May-20 03:13 PM True 20-May-20 03:13 PM maybe there is a force field locking the stage 20-May-20 03:13 PM but you can stand in front of people 20-May-20 03:13 PM and block their view 20-May-20 03:14 PM Other emotes are problematic too though. Mistimed clapping would have been very annoying. 20-May-20 03:14 PM But I can just imagine now 20-May-20 03:14 PM A card that says "you may now clap" where clapping is turned on temporarily 20-May-20 03:14 PM And yeah, the view blocking is obnoxious 20-May-20 03:14 PM And I guess it's Miis, but it feels weird to not be able to see the slides and presenter at the same time 20-May-20 03:19 PM Yeah when you go to the full-screen view of the slides 20-May-20 03:19 PM it should have a window on the left and show the presenter's mii 20-May-20 03:19 PM and it should animate their mouth based on their microphone 20-May-20 06:25 PM That seems kinda worthless and in fact less useful with the distractions mentioned than just a screenshare of slides with the speaker's audio, and maybe a video stream 20-May-20 06:37 PM you'd think so 20-May-20 06:37 PM but it's definitely a bit more engaging 20-May-20 06:37 PM I had much less urge to alt-tab and do other stuff 20-May-20 08:01 PM Hmm surprisingly practical 20-May-20 08:44 PM Ultimately the biggest problem with virtual conferences is that you're assuming hundreds of random people will have a decent mic set up with noise gating, compression, pop filter, etc. 20-May-20 08:44 PM And that the software will just work which is generally not the case 20-May-20 10:04 PM true story: My company held an online musical concert via Zoom just the other day. Hired like 3 different singer/songwriters and they all took turns (each in a separate location) singing to randos 21-May-20 05:54 AM @idmb what was the conference? 21-May-20 08:37 AM well it was replacing the "American Physical Society Northwest Conference" taking place at Thompson Rivers University but they had to find a bunch new speakers and rebranded it as "Thompson Rivers University Virtual Physics Conference." I guess APS wasn't supportive of it? 21-May-20 10:40 AM Thanks was talking with friedns about it and they were curious 21-May-20 12:27 PM Mr. President, they have a chonk. 21-May-20 12:27 PM JFK: Are you sure? Couldn't it just be a floof? 21-May-20 12:27 PM No sir. This is a real chonker, look at this picture. 21-May-20 12:27 PM JFK: Dear God. 21-May-20 12:27 PM https://twitter.com/giantcat9/status/1262368950035374080?s=19 21-May-20 12:30 PM bwahahahaha 21-May-20 06:45 PM windows update changed my background and it hurts my eyes 21-May-20 08:46 PM I was cleaning out our warehouse today (Family Business) and I came across a folder with letters of recommendation and his resume from 76 before he started the business. He was a quality control engineer specializing in electronics. He worked for Buckner sprinklers (they made controllers) and also for the government working on systems for Apache Helicopters. He also while in the service was in combat engineering development where he did the initial evaluations on the headset starlight scope, the first wearable night vision. 21-May-20 08:46 PM He also ran the Litronix assembly facility where they made first gen digital watches. They closed that place in 75 as Litronix was bought by Seimens and the cheap Asian watches were coming in. They had just delivered the machines to manufacture the cases which up until that time were coming in from another vendor and they called and told him the bad news. They have him a wonderful letter of recommendation. He took their acceptance rate from 40% up to well over 90% in just a few months. They also made calculators there. 21-May-20 08:46 PM He was offered a job at Hughes but would have had to move to LA. My sister had just been born and they had bought a house here so they were stuck so he did the only thing he could do and opened up his own electronics business making Sprinkler Controllers. We moved to agriculture about 30 years ago but we are still in the controller business all these years later. 21-May-20 08:46 PM Pretty gutsy for 1976! 22-May-20 10:31 AM more targeted ads 22-May-20 10:31 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/unknown-D0FF8.png 22-May-20 02:16 PM That ad seems to assume you're a brainless dolt 22-May-20 02:16 PM I mean, who else would want to waste their life talking to a chatbot?? 22-May-20 02:16 PM (other than a bored highschool student) 22-May-20 10:09 PM I think it’s time to service the small exhaust station. It’s having a hard time getting below the middle of the -5 scale and the diffusion pump actually stalled today while breaking down some cathodes. It’s been many years since that one was serviced. So clean out the diffusion pump. The mechanical pump is running fine so I will leave that alone. There are a couple of traps, and the o rings in the compression ports are probably time to go. 23-May-20 04:21 AM My mom today: hey, can you charge my geiger counter? 23-May-20 04:23 AM your mom sounds pretty cool 23-May-20 04:27 AM As a person, sure. Parenting… *long, uncomfortable silence* 23-May-20 04:27 AM But yeah. Gonna turn on the ambient clicky, once I find the manual! 23-May-20 04:37 AM ️ 23-May-20 12:03 PM working on some Hertzian contact theory maths today 23-May-20 12:03 PM as I got the analysis for the watch screw + pinion back, so now I have some alloys IDd, and able to plug in some numbers (both medium carbon steel) 23-May-20 12:03 PM the specific thing I am tracking down is size and shape of screwdriver blade 23-May-20 12:03 PM for the screw 23-May-20 12:03 PM ideas such as using poissons ratio for putting on down force to 'squeeze' out the blade and make it contact the inner sidewalls, etc 23-May-20 12:03 PM pretty interesting.. but it needs some further analysis 23-May-20 12:03 PM only at some basic high level topics, gotta actually get some maths down 23-May-20 12:22 PM I had a “Well there’s yer problem” moment. Teflon tape on a brass 1/8 NPT fitting. No wonder this thing was not getting below middle in the -5 scale. The pump and oil actually looked pretty good. 704 silicone. 23-May-20 12:22 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/image0-D7533.jpg 23-May-20 12:22 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/image0-7D8AD.jpg 23-May-20 12:24 PM this is still one of the cutest pumps I've ever seen 23-May-20 12:53 PM I just went for broke with the silver solder. Looks a little iffy. 23-May-20 12:53 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/image0-077F1.jpg 23-May-20 12:53 PM This may come back to bite me 23-May-20 01:19 PM The heater/platten needs to be re done. Bad thermal transfer. 23-May-20 01:19 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/image0-924DC.jpg 23-May-20 01:21 PM got physical copies of the alloy analysis.. same as the PDF they sent, but snail-mail works too 23-May-20 04:14 PM Cleaned it up and put it back together. Baking out the diffusion pump. Huge gas load. Worried I did not get all of the cleaner out of it. 23-May-20 04:14 PM Also I think a few drops of penetrating oil got on the heating element. Has that burning oil smell. Oh well. That should cook ok 23-May-20 04:14 PM The silver solder on that plug worked fine. Base pressure of the Manifold with just the mech pump is 5 micron. Half of what it was before. 23-May-20 05:17 PM Think I have a leak in the sleeve fitting that the diffusion pump bangs from. Also the main valve has a leak. No clue if the parts are even available anymore. 23-May-20 05:29 PM I've got access to a really nice professional XRF gun that has a big database of metal alloys. 23-May-20 06:00 PM I found the leak. It’s in the pump itself. Bottom flange braze is leaking. That’s gonna be tough to fix 23-May-20 09:28 PM I re fluxed and flowed the braze. It’s running now. Middle of the -4 scale. Let’s se where it is in an hour. It’s probably a mega gas load pushing out all the solvents and such I introduced in cleaning things. 23-May-20 10:16 PM Solvents should go pretty instantaneously, we use them because they evaporate quick 23-May-20 10:20 PM Down to 2.3 X 10-5 23-May-20 10:20 PM I use Berrymans Chem Dip to remove the old deposits in them from when they used to run octoil. That stuff takes a wile to work it’s way back out of the pores in the aluminum. 23-May-20 11:43 PM I have had such bad luck with leaks in brazing. 23-May-20 11:43 PM I think I need more heat. I can't get enough heat into the whole piece at once. 24-May-20 12:01 AM Hence my recent acquisition of an oxyacetylene rig with rosebud heads. 24-May-20 12:21 AM Lol that reminds me of my earlier musing on whether silver brazing an NPT fitting might ever make sense 24-May-20 12:21 AM Hmm yeah I've had a lot of difficulty trying to heat a joint between a big piece of 2" x 1/4" wall aluminum circular tubing and a 3/8" thick plate for brazing. I bought one of the soup-can-style propane torches that people often use for burning weeds in sidewalk cracks etc. to see if that works any better. I was unable to hit brazing temperatures even with several layers of insulation over both entire parts and a propylene torch. It's a giant heat sink. 24-May-20 10:02 AM I get many little lectures by our welder about how to design stuff to be easy to weld well 24-May-20 10:02 AM But I keep getting them because I'm seemingly bad at generalizing 24-May-20 10:05 AM time honored tradition among welders and machinists is blaming everything on the engineers/designers...and sometimes it is accurate (okay a lot of times in my experience) 24-May-20 10:05 AM hard to design things with manufacturing in mind if you do not have experience with those processes really 24-May-20 10:15 AM That's why our machine shop has a machinist go over designs before agreeing to do it. 24-May-20 10:15 AM It's honestly a life saver 24-May-20 10:21 AM lot of times when i have people wanting parts made there is a back and forth of "do you really NEED this feature?" "You have this tolerance marked +0"/-0.0001" do you really NEED that?" 24-May-20 10:58 AM I had never really looked into underground testing much (until it reappeared in the news recently) but I wonder what the line of sight tube vacuum systems would look like... 24-May-20 10:58 AM Some of the photos available online are interesting: https://catalog.archives.gov/id/75478167 24-May-20 11:43 AM I go over all my designs with the P.Eng tech director and at least one of the machinists 24-May-20 11:43 AM but they always miss something that I apparently messed up 24-May-20 11:43 AM they're super capable but because it's not a pro shop, ten years of this job is probably only like 2-3 years of real work they have tons of downtime 24-May-20 11:43 AM they're very creative and basically anything "can be done" but even basic stuff takes many more hours than you'd expect. for simple stuff the subsidized rate often ends up costing the same as ordering from another shop... 24-May-20 12:02 PM @Mezmorizor I don't remember, do you have small metal cells with a leak valve for doping, or only an oven? 24-May-20 12:02 PM Your intro makes it sound like just an oven 24-May-20 12:07 PM I got it sealed up. The diffusion pump comes up to speed much faster now. The system still had the same ultimate pressure but it just gets there faster. I think that’s just as good as that tiny pump can do, also I believe the packing on the ball valve is leaking on the diffusion pump side. Would be a total pain to even get it apart and I doubt parts are available. Changing the valve is not really possible. It would basically be a total system re do at that point. 24-May-20 12:07 PM Also all the on and off of the mech pump and the motor centrifugal starting switch is starting to stick. Bad cause it can roast the winding. 24-May-20 12:09 PM @LRM I’ve seen twitter accounts that are essentially nuclear testing p0rn. The effects tests are particularly impressive, with their massive LOS pipes, fast acting closures, etc. All the various fluence detectors. Lots of old stuff. PDP/11’s. Etc. Go back far enough and you see Tek oscilloscopes with polaroids. 24-May-20 12:10 PM Oh which twitter accounts? 24-May-20 12:10 PM Yep, saw photos on someone's twitter and got browsing the national archives 24-May-20 12:10 PM lemme see if i can dig it up again 24-May-20 12:10 PM https://twitter.com/Casillic/status/932928856251564042 24-May-20 12:10 PM he has a ton of that sort of stuff 24-May-20 12:11 PM @idmb I really wouldn't call it a leak valve, but yes, we have both. Can dope with plain gas, cracked oxygen (or used to be able to RIP that part), or combustion products with the "oven" that's not really an oven. 24-May-20 12:11 PM And the bulkheads with the RV shaped conical cutouts..... 24-May-20 12:11 PM Seems like the national archives search is not working today? Not sure why but none of the stuff i was looking at last night will load for me 24-May-20 12:11 PM The intro emphasizes the oven because that's the more novel aspect of what we do 24-May-20 12:12 PM Chris Casilli rocks. I’ve met up with him a few times on his Chicago trips. 24-May-20 12:13 PM That's some awesome stuff, you can see these on publicly available national archives too? 24-May-20 12:13 PM What does the non-oven thing look like? 24-May-20 12:13 PM There were some twitter accounts that have been deleted which focused almost exclusively on NTS, Johnson Atoll, Kwaj, etc. 24-May-20 12:14 PM I'm in the middle of trying to design a doping cell mounting scheme that's easy to make, works well, and is convenient to adjust alignment of 24-May-20 12:14 PM @Mason_Yu yes i was looking last night by searching "vacuum" in the collection of nuclear related stuff but I cannot get it to load at the moment 24-May-20 12:14 PM Casillic posts a wider range of stuff. 24-May-20 12:14 PM It’s terrifying to think that we now are on the path to resuming nuclear testing.... 24-May-20 12:15 PM https://catalog.archives.gov/search?q=Vacuum&f.ancestorNaIds=66328429 24-May-20 12:15 PM ‘45 has floated his trial balloon. 24-May-20 12:15 PM Like the plain gas doping thing? 24-May-20 12:15 PM think that was the url for that search based on my browser history 24-May-20 12:15 PM Yeah. Do you just flood the chamber? or have a small cell in the chamber? 24-May-20 12:16 PM The in chamber aspect is a tube with a hole pointing towards the beam that's aligned perpendicular to it. 24-May-20 12:16 PM Just running to a leak valve? 24-May-20 12:17 PM Hmm the national archive search is just not working atm, will try later 24-May-20 12:17 PM yeah i cannot even get image pages to load right now 24-May-20 12:17 PM was working just fine last night 24-May-20 12:17 PM It's a meter valve, but yeah 24-May-20 12:18 PM Ok cool, yet another doping solution lol 24-May-20 12:18 PM I was hoping you had something like this: 24-May-20 12:18 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/unknown-111CD.png 24-May-20 12:18 PM We're also experimenting with giant section just cut out 24-May-20 12:18 PM But that's still a work in progress 24-May-20 12:18 PM cut out of? 24-May-20 12:18 PM Definitely dopes, but doping parameters not well characterized 24-May-20 12:18 PM Sorry I'm multitasking pretty hard 24-May-20 12:19 PM Now that he’s got it in his head, it’s going to be hard to shake him off it. Then... goodbye CTBT. It’ll burn in the dumpster fire along with the JCPOA, the IRBM treaty, and Open Skies. As to whether New START joins it too depends on who wins in November. 24-May-20 12:19 PM technically this counts as me working rn 24-May-20 12:19 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/unknown-607A1.png 24-May-20 12:20 PM It's like if you take a cylinder, cut out the top half for like an inch, and used that as the hole 24-May-20 12:20 PM This should be best for background reduction, I just want it to be convenient to build and work on 24-May-20 12:20 PM Interesting. Weird idea. 24-May-20 12:21 PM It's just to increase efficiency, but who knows if it'll have acceptable background 24-May-20 12:21 PM And it's not quite literally that, but that's the idea 24-May-20 12:21 PM This cell design seems to be the "best" 24-May-20 12:23 PM @rdpierce Whatever test they are thinking about must be low yield stuff right? And what's a test going to do anyway? 24-May-20 12:23 PM Technically, it won't accomplish much at all 24-May-20 12:25 PM @rdpierce I can kind of see both sides of the desire to test... Think it is mostly a bad idea especially with the current justifications that people are trying to push but the world is a much different geopolitical landscape these days, our nuclear weapons programs have been pretty badly managed and maintained (from what I have read) for the last few decades, and there are some realistic concerns with the stockpiled weapons aging in unpredictable ways... Still none of that really screams "we need to test" to me. 24-May-20 12:25 PM Subcritical tests are very good 24-May-20 12:25 PM Not only in validating models, measured cross sections, but actually testing weapon assemblies with intense pulsed neutron sources 24-May-20 12:26 PM I think what Trump wants is a low-mid yield test but nobody really knows for sure (likely including Trump himself) 24-May-20 12:26 PM this is on the heels of supposed Russian violations of the test ban treaties and open skies treaty behavior like restricting flights over some of Russias cities 24-May-20 12:27 PM We are bound by the threshold test ban treaty, so any test must be <150 kt. 24-May-20 12:27 PM And underground. 24-May-20 12:27 PM Based on what I’ve seen, getting good science out of a nuclear test is extremely difficult. This stuff is just as much an art as a science, everyone who did it is gone, the materials aren’t in existence anymore. 24-May-20 12:29 PM One U.S. official said a nuclear test could help pressure the Chinese into joining a trilateral agreement with the United States and Russia, but some nonproliferation advocates say such a move is risky. “If this administration believes that a nuclear test explosion and nuclear brinkmanship is going to coerce negotiating partners to make unilateral concessions, that’s a dangerous ploy,” Kimball said. 24-May-20 12:29 PM I can't see the logic behind that 24-May-20 12:29 PM I think the lack of testing infrastructure is pretty embarrassing 24-May-20 12:29 PM but that is a story told time and time again 24-May-20 12:29 PM where we have this infrastructure for things 24-May-20 12:29 PM and then we let it rot 24-May-20 12:30 PM That said, ‘45 wants this to make a geopolitical statement. Just blowing up a nuke underground can be done relatively easily. Bonus points if you get the stemming right and there isn’t venting. 24-May-20 12:31 PM I am actually reading the after the fact report about Baneberry and the giant venting plume: https://www.osti.gov/servlets/purl/4679984 24-May-20 12:31 PM It might stir up more anti-nuclear sentiment among the general public though, not only directed at weapons but at the wider industry in general 24-May-20 12:31 PM There wasn’t a choice re: letting it rot. The big issue is losing people. Second to that is the supply chain of equipment. Unless you’re regularly testing, you cannot keep the imstitutional knowledge. 24-May-20 12:31 PM My major take away so far is to make sure things are not saturated when doing an underground test...because all that steam has to go somewhere 24-May-20 12:31 PM Just like we can’t just rebuild the Saturn V and Apollo and go back to the moon. 24-May-20 12:32 PM Costs less to keep the supply chain going needlessly than to rebuild it when you do need it in a hurry, from what I understand anyway. Definitely open to being wrong on that. 24-May-20 12:33 PM People get old, retire, and die. 24-May-20 12:33 PM Also, the CTBT was signed. If it were ratified, testing should be never, not when. 24-May-20 12:35 PM Instrumentation and quantitative computer models have come so far that I seriously doubt there is anything new we'd learn by actually exploding a warhead 24-May-20 12:35 PM And I also doubt that an actual test is the only way to keep the supply chain going, or to keep old knowledge alive 24-May-20 12:37 PM Makes me real sad how many people touting climate change as the #1 concern still won't consider nuclear power 24-May-20 12:40 PM An actual test's true value is not technical, it's the threat that matters. Need provable threatening weapon to make MAD work 24-May-20 12:40 PM The models are actually not that good. There’s as much an art about weapons design as there is science. This is more a problem when you are trying to produce an optimized physics package, e,g. weight, volume, etc. 24-May-20 12:41 PM Do we just want weapons of higher yield, and a smaller package? Is the goal to restart weapon production and get into another nuclear arms race? 24-May-20 12:42 PM Once can design conservatively, but if the goal is to make a tiny, lightweight physics package that will fit in a MIRV, that can’t be done by computer, without testing. 24-May-20 12:42 PM I don't really believe that, sure if you're trying to optimize something isn't quantifiable you can't do that easily through numerical simulations. 24-May-20 12:42 PM I think the problem is that nobody, including the guy ostensibly in charge, knows what the end goal really is 24-May-20 12:42 PM I don’t think we should resume testing. It’s horrifying. 24-May-20 12:42 PM Something about an end goal of just wanting to look big and strutting around? 24-May-20 12:43 PM From working with people at Los Alamos doing subcritical tests, the impression I got is that the numerical models are very good 24-May-20 12:43 PM The articulated reasons involving Russia and China make some sense but the testing plan without there being a lot the public is unaware of makes little sense 24-May-20 12:44 PM I think it’s more about giving red meat to his base and distracting from the COVID death toll. 24-May-20 12:45 PM Would be more willing to believe this is someone inexperienced in geopolitics playing geopolitics more than trying to drum up support from Trump's base 24-May-20 12:45 PM Doubt a nuclear test would do that really...could cause some pretty major divisions in the political parties 24-May-20 12:45 PM I of course don't actually know if one can design a compact, high-yield working weapon from just numerical models, but I think these models are there to make sure that warheads available right now will work, not to make brand new designs 24-May-20 12:47 PM Aren't almost all the warhead designs that have been produced or are on the horizon based almost entirely on designs that had actual tests done? Not something I have looked into extensively but that was my impression from what I have read. 24-May-20 12:48 PM Well.. yeah? If you have empirical data why wouldn't you use it? 24-May-20 12:48 PM Depends what the simulations/models show? 24-May-20 12:48 PM Materials science has come a long way from when a lot of the base designs were developed 24-May-20 12:48 PM Lot of this stuff is 1970s/80s technology at best 24-May-20 12:49 PM But that would just end up being a cost-benefit analysis 24-May-20 12:49 PM Are the benefits of a refined design with modern tools worth the cost of R&D? If there's some fundamental scaling law of output/weight/cost of some part that doesn't change with the new tools, that analysis isn't that complicated. At least to see if there's a many-orders-of-magnitude benefit. 24-May-20 12:51 PM The nuclear tests themselves are not nearly as terrifying as ramping up production and stockpiling of new, modern compact warheads 24-May-20 12:51 PM For nuclear weapons, at some point you have to know when to say it's enough 24-May-20 12:51 PM I'm not arguing that there isn't art involved in any high tech industry! Just that the artistry is not essential when you have such quantifiable variables 24-May-20 12:53 PM That’s like saying Microsoft can write a new operating system, compile it, and ship it without testing it because computers are understood. 24-May-20 12:53 PM No it's not, because the documentation of the old stuff exists... 24-May-20 12:53 PM New nuclear weapons designs cannot be built without testing. 24-May-20 12:53 PM All our nuke designs are 70s/80s tech. 24-May-20 12:54 PM Why is there such a drive to make new designs? Aren't the 70s nukes not terrifying enough? 24-May-20 12:54 PM If they are not terrifying enough to serve as a deterrent, then sure go ahead and actually test one 24-May-20 12:54 PM How different does it have to be to be considered a "new design?" 24-May-20 12:55 PM There are concerns about being able to continually manufacture new warheads using the old designs. 24-May-20 12:55 PM That’s the argument for testing. 24-May-20 12:55 PM The analysis and prediction is not for the design of new high performance weapons, that's not what national labs say they are used for (although of course no one can be sure). They are there to make sure things like changes in plutonium's material properties over time doesn't affect weapon performance, reliability and safety 24-May-20 12:56 PM But one could also say that’s a good thing, that we want to live in a world with fewer nukes, not more. 24-May-20 12:56 PM If you paint it a different colour is that a design change? 24-May-20 12:56 PM I remember hearing about an incorrect bolt material messing up an underground test. 24-May-20 12:56 PM Leaving a light bulb in the zero room of an effects test. 24-May-20 01:01 PM Engineers don't get to make that decision of whether it's necessary to do a nuclear test or not 24-May-20 01:01 PM Politicians do 24-May-20 01:02 PM An unfortunate thing about the existence of nuclear weapons is that they really are unlikely to go away anytime soon. If you read about the sad state of the weapons production infrastructure you really have to wonder how viable our nuclear deterrent will be in 20-30yrs if nothing is really remedied... 24-May-20 01:02 PM It might not have been a bolt.... some numbers were way off on a test, and they looked at photos of the test rack as it was going into the hole and realized something was attached that shouldn’t have been, which affected the numbers. 24-May-20 01:02 PM Do not think that testing is the right way to go about fixing that but it is something that gives me some concerns with what I have read 24-May-20 01:03 PM An unfortunate thing about the existence of nuclear weapons is that they really are unlikely to go away anytime soon. If you read about the sad state of the weapons production infrastructure you really have to wonder how viable our nuclear deterrent will be in 20-30yrs if nothing is really remedied... Oh shame they’ll all be broken and nonfunctional. 24-May-20 01:03 PM I mean...that could be a real and not snarky reality. 24-May-20 01:03 PM Yeah, I get that 24-May-20 01:03 PM Also, a lot of good things have come out of stockpile stewardship in the past few decades 24-May-20 01:04 PM If the unreliability of every nation’s stockpile increases with time, then their value as a deterrent becomes less, so it is more likely that they’ll finally be abolished. 24-May-20 01:04 PM The world's fastest computers are working on it, and inertial confinement fusion got its biggest success yet from stockpile stewardship funding 24-May-20 01:04 PM Not to mention building the world's largest lasers, extremely sophisticated material simulations and testing, nuclear instrumentation...etc 24-May-20 01:05 PM It follows from this that if one nation tests, then every nation with a strategic stockpile must test. 24-May-20 01:07 PM Or at the very least it gives them the precedent to do so 24-May-20 01:07 PM @rdpierce I am not sure that your statement about nuclear weapons being abolished is accurate... especially with places like NK building new bombs 24-May-20 01:07 PM 100 years from now, people in the US and Russia are going to have no idea if these things still work and how big a boom they’d make if they don’t test. 24-May-20 01:07 PM I’d say that’s a good outcome. 24-May-20 01:08 PM Not China too? 24-May-20 01:09 PM Given that China joined the nuclear club later in the game, I’d think that they are hurt the most by the CTBT and would gain the most from resuming testing. 24-May-20 01:09 PM They also have a much smaller arsenal, so stockpile reliability is more of a concern to them re: deterrence. 24-May-20 01:09 PM So punishing China by resuming nuclear tests makes no sense. 24-May-20 01:12 PM I think the main thing with China is trying to get them into the missile treaties 24-May-20 01:12 PM I was also under the impression that much of China's stockpile is more modern than US/Russia...but after checking quickly I cannot find a source for that 24-May-20 01:14 PM Pipe dream. They have no reason to join in strategic arms limits when the US and Russia have so much of a larger arsenal. 24-May-20 01:15 PM idea: give the vatican all nuclear arms 24-May-20 01:15 PM wcgr 24-May-20 01:15 PM You know, there was serious talk about entrusting the UN with all of them. 24-May-20 01:15 PM And no chance China can be pushed to any treaties once testing resumes, they face no domestic pressure 24-May-20 01:16 PM Looping the USSR into the Manhattan Project, letting them know that nukes are being developed to defeat Germany and then Japan, and the tech will be entrusted to the UN post-war. That way, the US-USSR arms race would have been avoided. 24-May-20 01:16 PM My Chinese friends have said the domestic pressure is very much to expand and modernize the nuclear capabilities over there 24-May-20 01:16 PM They are sorta disconnected from the day to day goings on though because they live in the USA 24-May-20 01:18 PM My mom was born on the day China tested its first hydrogen bomb 24-May-20 01:18 PM And she was given a nick name "red cloud" by my grandpa, an engineer working for the military 24-May-20 01:18 PM Once testing resumes, it would be seen as the representation of national pride in the eyes of many Chinese people 24-May-20 01:21 PM I wouldn’t be surprised. Which is why pulling the plug on the CTBT is stupid and would help China. 24-May-20 01:21 PM Just like pulling the plug on the JCPOA is making an Iranian bomb far more likely. 24-May-20 01:26 PM Still not convinced that was the wrong thing to do...but there were probably better ways to handle it. Would be nice to see more information about the "uranium particles" detected at that warehouse by IAEA and know exactly what was going on there 24-May-20 01:32 PM By and large, Iran was complying with the JCPOA. They were never truthful in their disclosures about their bomb program, but it was ended in 2003. They said they didn’t have a bomb program. Nobody believed them, which is why the JCPOA went so far beyond IAEA safeguards. 24-May-20 01:36 PM Does not sit well with me that there is probable evidence of Iran's noncompliance in one area but people assume they were complying for the most part...but I have not seen the actual IAEA report that was reported on widely in the media last year regarding their possible noncompliance 24-May-20 01:36 PM https://www.iaea.org/sites/default/files/gov-2015-68.pdf 24-May-20 01:37 PM https://www.reuters.com/article/us-iran-nuclear-iaea-exclusive/exclusive-iaea-found-uranium-traces-at-iran-atomic-warehouse-diplomats-idUSKCN1VT0L8 24-May-20 01:37 PM I haven't looked a whole lot for the actual report 24-May-20 01:37 PM Now, it's impossible for that kind of surveillance to even happen in the first place 24-May-20 01:37 PM I still think surveillance is a better approach to non-proliferation than sanctions 24-May-20 01:37 PM Well if we believe IAEA that the uranium particle is not highly enriched, why was there such a big stir-up? 24-May-20 01:41 PM I think the main thing is the lack of explanations given for it 24-May-20 01:43 PM The US pulling out and imposing secondary sanctions on Europe deprived Iran of virtually every benefit for being in the JCPOA. So of course they are playing games now. 24-May-20 01:45 PM "“The Agency has identified a number of questions related to possible undeclared nuclear material and nuclear-related activities at three locations that have not been declared by Iran,” Mr Grossi said in his first address to the Agency’s Board of Governors as Director General. “The Agency sought access to two of the locations. Iran has not provided access to these locations and has not engaged in substantive discussions to clarify the Agency’s questions. This is adversely affecting the Agency’s ability to clarify and resolve these questions and to provide credible assurance of the absence of undeclared nuclear material and activities in Iran. I call on Iran to cooperate immediately and fully with the Agency, including by providing prompt access to the locations specified by the Agency.”" - https://www.iaea.org/newscenter/news/iaea-director-general-calls-on-iran-to-cooperate-immediately-and-fully 24-May-20 01:45 PM Ah it appears the uranium particles were in an undeclared warehouse and was too refined to be just from yellow cake 24-May-20 01:46 PM The JCPOA at least gave the world good assurance that they couldn’t get a bomb rapidly. As we’ve learned from DPRK, once a country has a nuke and a delivery system, negotiation is not possible. 24-May-20 01:46 PM If they were engaged in secret operations involving nuclear material anyway did it really give that much assurance? 24-May-20 01:47 PM But without surveillance now that it withdrew from the JCPOA, there's even less assurance 24-May-20 01:47 PM Those secret operations are all ancient history. 24-May-20 01:48 PM As technology develops, getting various parts of a weapon together under sanction is only going to get easier 24-May-20 01:48 PM Seems like there wasn't a whole lot of surveillance before if it took the Israelis reporting on the warehouses publicly before the IAEA would do anything? 24-May-20 01:48 PM Whole point of secret programs is you know...secrecy 24-May-20 01:49 PM Netanyahu just wants to back the US into a war with Iran. 24-May-20 01:49 PM Having all their uranium fuel cycle under very high levels of IAEA scrutiny is pretty darned good,. 24-May-20 01:49 PM If that was the case you would think Iran would want IAEA inspectors crawling all over those sites 24-May-20 01:50 PM So what if they lied over their past? We all know they lied. It should come as no shock. 24-May-20 01:50 PM This isn't related to the past as far as anyone knows? Without letting inspectors in there is no way to say it was related to their past activities 24-May-20 01:50 PM If it was related to their past activities...why not let inspectors in now? 24-May-20 01:53 PM They are no longer getting the economic benefits of the JCPOA, so why should they? If the US hadn’t pulled out, I think the situation would be different. 24-May-20 01:53 PM I think this all started before the US pulled out but I could have the timeline slightly off 24-May-20 01:53 PM Not letting inspectors in is just retaliation to crippling sanctions wasn't it? 24-May-20 01:53 PM Would be a huge embarrassment to the US/Israel to have IAEA inspectors in debunking the claims 24-May-20 01:57 PM @LRM , Iran had a bomb program. Nobody here is denying it. There are probably sites all over Iran related to it that are contaminated at a low level that could be detected by sensitive enough instruments. But who really cares what happened pre-2003? We gave Iran a choice of a carrot or the stick. They chose the carrot. We took the carrot away. Why should they cooperate further? 24-May-20 01:57 PM But right now there's really no deterrence for Iran to develop nuclear weapons, no matter what they do, the US won't lift the sanction under Trump. And they are an oil rich nation that can receive covert support from Russia, China and North Korea 24-May-20 02:00 PM @rdpierce I am talking about the uranium that was detected at sites Iran will not let inspectors come in to investigate? Looks like I was combining two Netanyahu things into one where he made the "Iran lied" presentation (regarding the lying about the nuclear weapon program) and the presentation from later that year involving the uranium particles 24-May-20 02:00 PM Would not be surprised if there was nonpublic info about the warehouses at the time of the USA withdrawing 24-May-20 02:05 PM Given Iran and North Korea has cooperated successfully to develop operational ballistic missiles when both nations were under intense sanctions, I won't be surprised if they can do the same with nuclear weapons 24-May-20 02:05 PM The warehouse paints a picture consistent with what was known when the JCPOA was authored. They had a bomb program. They stopped it in 2003. This much was known when the JCPOA was authored. Iran has lied and claimed they don’t have a bomb program. So what? In diplomacy, permitting your adversary a face saving lie isn’t that bad if you still get your way. If it means the Iranian fuel cycle is under the tightest IAEA scrutiny ever, I’ll take it. 24-May-20 02:07 PM I do not really care about the lying about the bomb program. Lying about warehouses with nuclear material in them...that I care about because it undermines the whole verification side of JCOPA imo 24-May-20 02:07 PM https://isis-online.org/isis-reports/detail/revealed-emptying-of-the-iranian-atomic-warehouse-at-turquz-abad/8 24-May-20 02:07 PM Would be interesting to know what was in all those containers. 24-May-20 02:11 PM Natural uranium dust in a warehouse where old documents are stored means nothing. Now if you can show me another mountain bunker with undisclosed centrifuges spinning today, then yeah, I’ll agree you have a point. 24-May-20 02:12 PM It could be yellow cake, it could be refined uranium, but either wouldn't mean much. Evidence of unsupervised enrichment and handling of other vital weapon components would be necessary to cause a true breach of the treaty 24-May-20 02:13 PM When the US was party to the JCPOA, it appeared Iran was actually on good behavior and materially complying, at least in terms of current fuel cycle activities, even though we knew they would never be honest about their past. 24-May-20 02:14 PM Anyone have any sources for the false negative rate of nuclear inspections? lol 24-May-20 02:15 PM In cases of old sites, the IAEA has been pretty darned good at finding traces of stuff, even after Iran has attempted to sanitize the site. I generally do trust the IAEA. 24-May-20 02:16 PM Would have been nice to have the site inspected before everything was moved 24-May-20 02:16 PM Especially with them detecting "natural uranium particles of anthropogenic origin at a location in Iran not declared to the Agency" 24-May-20 02:16 PM (pretty widely reported to be the same facility) 24-May-20 02:19 PM Also, Israeli intelligence is top notch. Netanyahu wants to blow up the JCPOA. If there were another mountain with centrifuges spinning under it, he’d know, and he’d be shouting it to the world. If this is the best he can come up with, that’s good evidence to me of Iran’s genuine compliance. 24-May-20 02:21 PM From looking at the satellite imagery, the containers appears and disappears at that warehouse over more than half a year 24-May-20 02:21 PM Inconsistent with the claim that they emptied everything out just before an inspection? 24-May-20 02:22 PM Think they only allowed the inspectors in for sampling after everything was moved 24-May-20 02:22 PM These are natural uranium particles of anthropogenic origin at a location in Chicago not disclosed to the IAEA. 24-May-20 02:22 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/image0-40A04.jpg 24-May-20 02:22 PM And that is where the uranium particles come from 24-May-20 02:23 PM (My girlfriend just walked into the room. “You have tea... and yellowcake.” I love her.) 24-May-20 02:24 PM It doesn't take half a year to move a dozen containers though, it can be done overnight in a few hours, that would've been the rational thing to do 24-May-20 02:37 PM But just from looking at these known figures, it's getting more and more concerning that Iran could get 20-30kg of weapons grade uranium very soon 24-May-20 02:37 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/unknown-EE7D4.png 24-May-20 02:38 PM so I'm out of the loop - why have we decided we're in another cold war exactly? 24-May-20 02:41 PM Keep in mind of course the last little bit of enrichment from 4% onwards is easier than the starting bit. Estimates of breakout time to obtain 25 kg of WGU is continuing to fall and is somewhere around 3 to 4 months at the moment 24-May-20 02:41 PM @idmb In short, the US thought sanctions were more effective than surveillance by IAEA to deter Iran from a nuclear weapon 24-May-20 02:43 PM Yes, breakout time is more of a problem now... but they broke the limits only in response to the US breaching the treaty first. 24-May-20 02:43 PM Also, it should be noted that the NPT guarantees all signatories rights to dual use technology, such as enrichment and reprocessing. Essentially,the NPT gives all signatories the right to be threshold nuclear weapons states. 24-May-20 02:45 PM Hmm, technology continues to be the enemy of non-proliferation. It's always harder (politically and technically) to come up with comprehensive surveillance, rather than doing enrichment and develop other components like explosives and the neutron source sneakily 24-May-20 02:45 PM One could argue that Japan is such a state. They could trivially race to a bomb if they wanted one. 24-May-20 02:45 PM They reprocess fuel and enrich uranium. 24-May-20 02:45 PM is this at all correlated to that laser weapon thing where the recent demo had it destroying a drone? 24-May-20 02:45 PM seems that someone having the ability to block a nuclear attack 24-May-20 02:45 PM is a bit more of a problem than someone getting the ability to launch one 24-May-20 02:46 PM Uhh, a laser is not going to stop a re-entering ballistic nuclear warhead 24-May-20 02:47 PM In theory, Iran’s steps to break the NPT are all reversible. They could come back to compliance if the US did. 24-May-20 02:47 PM I’m wondering if it were possible for Biden to drop economic sanctions on Iran and simultaneously demand Iran come into compliance in X days. 24-May-20 02:47 PM If we are in compliance re: sanctions, and they aren’t re: enrichment, then we could trigger the snapback enforcement provisions, and it would be harder for our European allies to argue with that. 24-May-20 02:51 PM Any suggestion of Biden considering doing that would really energize Trump's base...also do not think Biden is really capable of managing geopolitics in his current state 24-May-20 02:51 PM Best case for Biden is he manages to minimize his public appearances and talking until the election 24-May-20 02:51 PM Those gaffs the other day were painful 24-May-20 02:54 PM Look who he’s running against. Inject bleach??? 24-May-20 02:54 PM Biden is a gaff machine. No argument there. I wish Bernie or Warren got the nomination. 24-May-20 06:28 PM @Mason_Yu Looks like the search function on the national archives website is back up and running. This is the link to search within the "Photographs Related to Nuclear Weapons Testing at the Nevada Test Site, 1/1972 - 12/2012" collection: https://catalog.archives.gov/search?q=*:*&f.ancestorNaIds=66328429&sort=naIdSort%20asc 24-May-20 06:28 PM Thanks! 25-May-20 12:46 AM @rdpierce The South Africans destroyed theirs, but that was in the face of an imminent risk of regime change with domestic ethnic tensions. No major parallel here. 25-May-20 12:46 AM Also, much less effective delivery mechanisms 25-May-20 08:50 AM Actually they didn't fully destroy it. The devices themselves were destroyed, but I've heard there's a secure warehouse somewhere in South Africa with the HEU components. 25-May-20 08:50 AM Enticing the uranium is 95% of the work. 25-May-20 09:02 AM Very interesting-- I hadn't known those were retained. 25-May-20 09:15 AM https://www.washingtonpost.com/world/africa/us-unease-about-nuclear-weapons-fuel-takes-aim-at-a-south-african-vault/2015/03/13/b17389f6-2bc1-4515-962d-03c655d0e62d_story.html 25-May-20 12:02 PM ... concerning. 25-May-20 05:32 PM @samy you've been referenced haha ! https://youtu.be/UsDnkrDvkBo 25-May-20 05:37 PM just watched it, so good! 25-May-20 05:37 PM was working on vid showing how to make iridescent chocolate...this just put it to shame 26-May-20 08:00 AM That was done by Eric Begleighter (sp?) 30 years ago. Making the chocolate hard enough to keep the fringe patterns from deforming and destroying the imagery makes it taste like terrible. Makes a good demo though. thoughts? 26-May-20 08:00 AM nifty: https://web.archive.org/web/20151023163225/https://www.nytimes.com/1997/04/02/garden/where-no-candy-has-gone-before-light-as-the-secret-ingredient.html but do yours last for weeks without refrigeration / taste / feel weird to eat? 26-May-20 09:05 AM interesting - I was able to temper and keep in fridge for a week without any noticeable change. I doubt it would last outside of the fridge very long. i tried spraying a glaze on top but the pattern went away after 26-May-20 09:56 AM Cool! The guy who made the masters for some of the holograms in the video says he'd get much better results using a nickel shim instead of final product holograms. 26-May-20 02:55 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/unknown-43D0B.png 26-May-20 06:27 PM it's like i'm there! 27-May-20 04:57 AM Nickel shims are how I'm doing the roll to roll fabrication of nanoimprint lithography features 27-May-20 04:57 AM Even working with one of the companies Ben referenced in the video description 27-May-20 01:46 PM got some sweet pea sprouts in soil in transparaent cups - for aphid culturing 27-May-20 01:46 PM plans are to go to a Vegemite based liquid diet 27-May-20 01:46 PM from a paper I read (did not specify vegemite, but the nutritional info was near yeast-extract.. which is vegemite, basically) 27-May-20 01:46 PM oh, and tldr - the mission was scrubbed due to weather 27-May-20 01:50 PM why are you culturing aphids? 27-May-20 01:50 PM feeder for pet frogs 27-May-20 01:50 PM and, they attack my only rose plant every season 27-May-20 01:50 PM ahhh interesting feeder choice 27-May-20 01:50 PM so, why not collect them from my front door? 27-May-20 01:50 PM yeah, there was one main guy who rpesented them to the hobby 27-May-20 01:50 PM but just on peas 27-May-20 01:50 PM nobody has ventured into the liquid culturing methods 27-May-20 01:50 PM they presented the papers, but nobody has done anything with them 27-May-20 01:50 PM basically a Parafilm membrane that the bugs puncture to drink from 27-May-20 01:50 PM that you can rinse the resevoir out weekly/whatever and put fresh stuff in 27-May-20 01:50 PM but, it's that special resevoir seutp that requires some engineering 27-May-20 01:50 PM the paper used custom glassware, like a parr ground glass bottle top 27-May-20 01:55 PM sounds like an interesting project. i know a couple people who keep ant colonies who mentioned culturing aphids a couple times but i think they decided it was more trouble than it was worth...hopefully your efforts are more successful. that liquid culturing method sounds like it would be really simple once you worked out the custom gear needed 27-May-20 02:15 PM they suck the life out of plants - is the problem, so keeping a fresh supply of plants is necessary - or liquid medium 27-May-20 02:15 PM yeah, I am thinking of a funnel upside down on a vented lide. with aprafilm separating.. 27-May-20 02:15 PM and a rubber bung sealing the top 27-May-20 02:15 PM similar to the original concept, just with plastics commonly available, not glass 27-May-20 03:20 PM https://catalog.archives.gov/id/75492321 this mannequin had a bad time 28-May-20 07:15 PM Running a small batch through my hydrogen furnace. Almost don’t need to turn it on. It’s 43 in the garage! Hahahaha. It’s about 1KW heating coil plus the heat from the exhaust hydrogen burning off in an open flame. It’s a freaking steam room/sauna out there! 28-May-20 07:15 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/image0-3DA0B.jpg 28-May-20 07:30 PM It’s 43 in the garage 29-May-20 08:38 AM It was 42 outside. 29-May-20 08:43 AM I went from ontario to australia for christmas once, went from -35C to +32C within 24 hours. I don't think I would survive +40 29-May-20 05:29 PM File under “Phil hates it when people get suckered by snake oil, doubly so when they’re proud of it”: https://dcist.com/story/20/05/29/two-d-c-bars-will-use-uv-cleanse-portals-upon-reopening/ 29-May-20 05:36 PM Odds it’s just a black light? 29-May-20 05:40 PM bars here are already open 29-May-20 05:40 PM no portals 29-May-20 05:43 PM Odds are quite high its some UV LED strips, interspersed with blue, so that you feel like it's on and doing something. Much like Vegas is thinking about. 29-May-20 05:51 PM PROTIP: if you are handed a handheld UV sterilizer by a casino in Vegas to "clean your slot machine" before playing: 1) Odds it's just a small handheld LED that does nothing is high. 2) If it actually worked for the intended purpose, you have a weapon please play nice. 3) No matter what, you're gonna find all the urine and semen spattered around the place and people. There's a reason Vegas doesn't do much blacklight on the Strip. 29-May-20 07:32 PM I had a conversation a few weeks ago with one of the worlds foremost experts in UV germicidal lamps. We had consulted together on a system for sterilizing soles of shoes for medical environments last year. Surface sterilization with UV for objects or people is simply not practical. Air and water are a different matter. That can be done within reason, but objects and living things is a fools errand. Chemical cleaning is far more practical. 29-May-20 07:38 PM Yep 29-May-20 07:39 PM Idk about that, I've teacher-assisted before in intro biology labs and a classic experiment is having a petri dish with e.coli and a piece of plastic wrap covering it, half covered with sunscreen, and then exposed to a UV light. The non-sunscreen side has significantly less colony growth the following day. 29-May-20 07:39 PM UV lamps are common in laminar flow hoods for sterile work as well. 29-May-20 08:06 PM Bacteria in a Petri dish is not realistic scenario for object sterilization. It’s not a matter of the effectiveness of UVC, it’s the manner in which UVC propagates. It has practically no penetrating capabilities at safe exposure levels. One thing we found during our investigation was if one virus was blocking another the efficacy followed a roughly logarithmic fall off. By a few microns depth of surface contamination it had little to no effect in a reasonable exposure power and time. So much exposure was required we had to basically provide a tent or shield that would surround your shoes as to not give the person too much exposure. 30-May-20 03:15 AM Well that seems relatively obvious 30-May-20 03:15 AM This is why gamma or ethylene oxide is more common in food/medical 30-May-20 03:15 AM In lab hoods, the lights are on anytime the hood is closed, which could be for a good 8-16 hours a day depending on the lab 30-May-20 09:14 AM I had a friend when working at th ebike shop that had an idea of a water bottle with a UV light underneath 30-May-20 09:14 AM I looked into it some.. and the amount of energy/time it takes was pretty extreme.. it seems more like a gimmick than anything 30-May-20 10:11 AM Did you guys see this? https://news.uci.edu/2020/05/19/uci-physicists-exploring-use-of-blu-ray-disc-lasers-to-kill-covid-19-other-viruses/ 30-May-20 10:11 AM tldr; I'm pretty sure he just wants money to make a 400nm -> 200nm frequency doubling crystal and is spinning covid for funding, which would be awesome 30-May-20 10:14 AM clever pitch haha 30-May-20 10:14 AM "The cost of these roaming hospital sterilizers – that are based on high-current mercury discharge lamps – is too high for deployment at the scale that may be needed to combat the coronavirus" 30-May-20 10:14 AM that seems...weird 30-May-20 10:14 AM i really cannot see how laser diodes will be cheaper than basic UVC lamps but maybe their pitch will work 30-May-20 10:17 AM easily pitches back that you can put a battery powered diode in a mask and have it be very portable 30-May-20 10:17 AM laser -> frequency doubler -> diffuser can't be replaced with LED -> frequency doubler -> diffuser since the frequency doubling efficiency goes up with the field intensity, and then as for why not UV LED... idk 30-May-20 10:22 AM i wasnt talking about the UV LEDs (shortwave UVC LEDs are all really low powered and $$$ afaik) but the actual UVC lamps you can find all over eBay. 30-May-20 10:22 AM i suppose the mask use would make sense for laser diodes 30-May-20 10:23 AM Yeah well just portability in general 30-May-20 10:23 AM the hospital room cleaning and air ducts applications not so much 30-May-20 10:23 AM The thing about it is if someone develops a good 400nm -> 200nm frequency doubler 30-May-20 10:23 AM tons of huge lasers become not worth it 30-May-20 10:25 AM yeah the frequency doubling side of it is super cool and useful...think they could have come up with a better pitch though 30-May-20 10:25 AM tons of us are using expensive 50Hz dye lasers that are a pain to use, when we'd happily frequency quadruple our broadband ti:saph 30-May-20 10:25 AM like there are endless applications they're just not financially worth it for government spending - healthcare on the other hand... 30-May-20 12:14 PM spacex soon 30-May-20 12:40 PM I wonder if this is the biggest livestream ever on YouTube 30-May-20 12:40 PM Just over 4 million peak viewers I believe 30-May-20 12:40 PM On the SpaceX stream alone 30-May-20 12:50 PM that was pretty cool 30-May-20 12:55 PM the red bull jump way back was closer to 10M I think 30-May-20 12:55 PM They said total viewership was also about 10 million for this one 30-May-20 12:56 PM that's pretty small though 30-May-20 12:56 PM esports (and sports in general...) do much larger on the regular 30-May-20 12:56 PM moon landing was 600M apparently ? 30-May-20 12:57 PM Imagine the viewership in 2024 (assuming deadlines are met) 30-May-20 12:57 PM But I think the explosion of the starship prototype yesterday was more spectacular 30-May-20 01:00 PM that would be quite alarming 30-May-20 01:02 PM Well the test itself was successful, and I'm pretty sure they'll have the next one ready to test by the end of next week 30-May-20 01:03 PM yeah I just mean 30-May-20 01:03 PM rocket explosion the day before you're strapped in a rocket 30-May-20 01:03 PM Like one wouldn't be stoked to be hearing about a huge plane crash when you're in line at the airport 30-May-20 01:03 PM Well there's like nothing in common between the two 30-May-20 01:03 PM or a cruise ship sinking as you're boarding 30-May-20 01:08 PM Yeah, that's a little disconcerting. 30-May-20 01:10 PM I would like to see how they're planning to do radiation shielding if this thing is going to Mars 30-May-20 05:09 PM To be fair it was not the same design. New prototype. 30-May-20 06:16 PM 200 is ozone based sterilization too which is pretty yikes 30-May-20 08:16 PM Vaporized hydrogen peroxide is best when the bleaching effect is not a problem. 31-May-20 12:39 AM I have learned that lasing at 200nm and under requires dogs, and I am wondering how many people have already made that joke. 31-May-20 04:55 AM https://www.youtube.com/watch?v=GuWQ1eEguM4 Finally there's the second part of how to build a gas chamber 31-May-20 06:33 PM I'm having trouble explaining to someone that this scope with 1GSamples/s that says it's a "1GHz Oscilloscope" isn't misrepresenting itself, since scopes are always sold by bandwidth, even though it would not do a good job of measuring a 1GHz signal? 31-May-20 06:33 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/s-l1600-A99DD.png 31-May-20 08:27 PM Well if it was a square wave and in sync, it could grab a 1GHz signal 31-May-20 09:04 PM I’m just trying to explain that bandwidth and sampling rate 31-May-20 09:04 PM Are completely different specs 31-May-20 09:04 PM Scopes have always been advertised by bandwidth 31-May-20 09:04 PM nothing to do with what they’re really good for 31-May-20 09:40 PM Just point them at Shannon's information theory 01-Jun-20 05:53 AM maybe it's 1 GHz in non real time 01-Jun-20 05:53 AM oversampling and such 01-Jun-20 05:53 AM 'cause 1 Gs/s gives 500 MHz real time 01-Jun-20 08:46 AM What an abstract: 01-Jun-20 08:46 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/unknown-BD565.png 01-Jun-20 09:15 AM this title is a good one.. https://pubs.acs.org/doi/10.1021/acsnano.9b00184 01-Jun-20 12:59 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/unknown-5B9E5.png 01-Jun-20 12:59 PM more targeted ads! 02-Jun-20 07:22 AM I use the imagery of LEGO bricks. That usually works after a bit. 02-Jun-20 08:56 AM A lot of it is over my head, but if anyone is interested the American Physical Society Atomic/Molecular Optical Physics conference is free and livestreamed this week: https://apsdamop20.onlineeventpro.freeman.com/ live Q&A, lots of concurrent talks, might be stuff of interest. 02-Jun-20 09:15 AM This one is on-demand rather than live, but his work with machine learning is what can only be described as wizardry: https://apsdamop20.onlineeventpro.freeman.com/sessions/15337549/subsession/25121223/Quantum-dynamics-calculations-enhanced-by-machine-learning 02-Jun-20 10:36 AM also a talk on UHV design: https://apsdamop20.onlineeventpro.freeman.com/live-stream/15338235/C12-Kimball-Physics-Workshop-Necessity-Delivers-Cohesive-UHV-Design 03-Jun-20 06:16 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/unknown-DB615.png 03-Jun-20 06:54 AM hahaha nice 03-Jun-20 09:39 AM I had a boss who made me a yellow cake for my birthday and dribbled green icing on it. Because according to the Simpsons, everything radioactive is green. 03-Jun-20 10:18 AM https://www.youtube.com/watch?v=7FQbvfTFwXI 03-Jun-20 10:35 AM "So what did you do today?" "I tested fate for a promo on youtube" 03-Jun-20 01:34 PM That sure is tempting fate 03-Jun-20 01:35 PM That noise when he kicks it, dannnng 03-Jun-20 01:35 PM Sounds like a dinosaur from Jurassic Park 03-Jun-20 01:35 PM Tbh when I was present where we vented a HiPace80 to atmosphere it did not make no way that nice of a sound. It sounded much angrier. 03-Jun-20 06:33 PM Watching Space Force on Netflix. Third episode so far and it’s actually ok. Good Greg Daniels brand comedy. It’s like modern slapstick. 03-Jun-20 06:50 PM I mixed up Daniels with Davies and got really excited for a second 03-Jun-20 07:46 PM i watched first ep last night and was so confused. wife was in bed, then next thing i know she's in prison? 03-Jun-20 07:46 PM did i miss something in between, or did time move forward or something? i missed something and tried to go back but couldn't figure out what 03-Jun-20 07:57 PM They do that in shows now. Things happen and they don’t explain it. The assumption is she went crazy cause she did not want to move from DC to the middle of nowhere and did something Nuts 03-Jun-20 08:47 PM Still watching and still no explanation. 03-Jun-20 08:58 PM i see, i just couldn't tell if a small or large period of time passed 03-Jun-20 08:58 PM thanks for confirming i didn't miss something 03-Jun-20 11:17 PM Haha, I basically want my wife to move to the middle of nowhere 03-Jun-20 11:17 PM (with me) 04-Jun-20 09:34 AM I'm still half considering that.. but the art studio got back to me on floor plan/available space for workshop.. but we need to figure out getting a bigger door in there, or on the outside 04-Jun-20 09:34 AM -or- ... I find a place in the middle of nowhere 04-Jun-20 09:34 AM I have my eye on 15acres that borders a creek right now 04-Jun-20 09:35 AM move to saskatchewan 04-Jun-20 09:36 AM they updated the listing... with non-snow pictures! 04-Jun-20 09:36 AM https://www.zillow.com/homedetails/0-W-Main-St-Cardington-OH-43315/2079307118_zpid/ 04-Jun-20 09:36 AM 12.2 ac 04-Jun-20 09:36 AM 43 miles to downtown columbus, hrmm 04-Jun-20 09:36 AM it's in a flood plain though, so just gotta build the house/workshop above a few feet 04-Jun-20 09:36 AM anywho - that's a possibility 04-Jun-20 09:36 AM cemetary on the other side of the creek 04-Jun-20 02:42 PM Yeah you can find Ohio land for $1k/acre with timber on it... That land is expensive because it's farm land and can make the owner money if they know how to farm it right 04-Jun-20 02:42 PM Oh, I guess it's only half farmland, but it's also right in town 04-Jun-20 02:42 PM East/mid-east coast is just so... Dead looking in the winter though, I'm really ambivalent about moving back 04-Jun-20 02:51 PM my apartment (condo building) last sold for slightly over $1000/sqft 04-Jun-20 03:07 PM there are 800 sq ft homes around here that sell for more than 500k 04-Jun-20 03:07 PM I'm also curious how the housing market is doing.. if I need to wait till spring to sell 04-Jun-20 03:07 PM I need to finish the reno anyways 04-Jun-20 03:20 PM Housing market hasn't crashed as I'd hoped it would (mostly so I could swoop in and buy something big and rural) 04-Jun-20 03:20 PM I think 80acres would be pretty nice, with a creek, some flatish area, a little bit of slope probably near the creek 04-Jun-20 03:29 PM I dont think the market will crash, here.. just less buyers 04-Jun-20 03:29 PM I think 80ac is a bit much for me, heh 04-Jun-20 03:29 PM sounds wonderful.. 04-Jun-20 03:29 PM but a bit much 04-Jun-20 03:29 PM I suppose if mostly wooded or similar then no worries 04-Jun-20 03:51 PM The playground right outside my window opened yesterday 04-Jun-20 03:51 PM so many kids 04-Jun-20 04:04 PM ours still have caution tape all over the things 04-Jun-20 04:04 PM allow restaurants to open indoor seating at 25 percent capacity 04-Jun-20 04:04 PM modified phase 1 from yesterday, interesting 04-Jun-20 04:04 PM I am hopeful we will be back on campus for summer quarter... but if it's all from home then so be it 04-Jun-20 04:04 PM get graduation certificate as PDF... 04-Jun-20 04:04 PM I just finished adjusting a watch due tomorrow.. just gotta clean it and reassemble + time it out 04-Jun-20 04:04 PM had to repoise the balance 04-Jun-20 04:18 PM Mostly I want forest to have hiking and dirtbiking trails, which will also serve as a longterm timber investment, or a source of building materials 04-Jun-20 04:18 PM Plus pretty much as much space as I could ever want for homesteading type projects, the odd "I need a huge building" project or "i need a pond to grow algae in for a biofuel project" sort of stuff 04-Jun-20 04:18 PM 80 acres is a lot, but really not /that/ much. That size feels a lot smaller in the flat-ish desert where you can easily see from one end to the other with nothing but bushes to obscure your view 05-Jun-20 01:35 PM Wow.... I guess YouTube saw my interest in Russian welding the wrong way (Kreosan) and my interest in RBMK-1000 reactors, and showed me this: 05-Jun-20 01:35 PM https://youtu.be/W1sgSFIMM0g 05-Jun-20 01:35 PM This is pure welding pr0n. 05-Jun-20 01:36 PM Question: how much do you have to like this stuff to learn russian? 05-Jun-20 01:36 PM And they show a weld being x-rayed. 05-Jun-20 01:36 PM I tried duolingo. Didn’t get very far. 05-Jun-20 01:36 PM I highly recommend learning the Cyrillic alphabet. A lot of technical words are English cognates. 05-Jun-20 01:37 PM For now I have a team of ukrainians to help me when something needs translating 05-Jun-20 01:39 PM Learning to identify when people around you are swearing is also helpful. 05-Jun-20 01:40 PM that's easy - whenever they're not speaking english 05-Jun-20 01:41 PM Like when Kreosan’s supposed welding expert sets the (admittedly dangerous) improvised welder on fire. Blyaaaaaaaaaaaaaaaad! 05-Jun-20 01:41 PM Also, absence of swearing is itself part of the joke. This almost certainly was staged: 05-Jun-20 01:41 PM https://youtu.be/eIUiYtXHusc 05-Jun-20 01:41 PM So the guy realizes his mistake, and he utters a characteristic Blyaaad! But the other guy who comes out is quite politely asking what the other guy was thinking. The absence of the swearing one would typically expect in such a context is a large part of the joke. 05-Jun-20 01:41 PM There’s a lot of meta-humor about Russian swearing. 05-Jun-20 01:41 PM Like a factory prohibiting swearing due to an upcoming inspection and the productivity dropping because the workers only knew the swear word-based names for the parts and processes. 05-Jun-20 01:41 PM Or the CIA planting bugs in Russian factories and learning that their rockets were built from three different parts (rather obscene words that essentially translate to “thing”) that are all completely interchangeable. 05-Jun-20 01:41 PM I was at a dacha party on the outskirts of Slavutich celebrating our survival of a week at the ChNPP, and “internal decontamination” with samogon, essentially moonshine, that was flowing freely. 05-Jun-20 02:12 PM Another party was happening at the same time, with workers from the plant, and our parties kind of merged. The only American woman in our group barely spoke a word of Russian. So one drunk plant worker was hitting on her. He was speaking to her only in Russian, but every third word out of his mouth was highly obscene, and she had no idea. I made a point of letting her know. 05-Jun-20 09:16 PM https://youtu.be/UxGO2QHSgFo Making beryllium dust for YouTube views apparently 05-Jun-20 09:53 PM Just want to vent... trying to design my new shop but I basically am having to pre engineer it to then take to an engineer as what I want is advertised all over in the engineered wood specifications from the manufacturers but I can’t find any builders or architect familiar with these methods so I am doing all the hard work so one of them can go over it, charge me for basically not doing anything and then stamp it. Frustrating. 05-Jun-20 09:53 PM It’s like I’m pointing at what I want and showing them how to design it, but since it’s not what they normally do they are not interested. 05-Jun-20 09:53 PM They just want to build the same boring ugly truss box they have always built even though there are far more efficient, economical, and serviceable new options already cleared for use in California. They are so big on being green and efficient but when it comes to newer styles of construction they are a wall of “No you can’t do that” 06-Jun-20 10:56 AM @Charles well at least you sound like you're going to make some progress... I've been stuck at drawing a CAD of my existing floorplan, let alone playing with desired layouts for expansion or actual engineering level thoughts 06-Jun-20 11:00 AM I'm still 99.9% sure modern microwaves don't contain beryllia 06-Jun-20 11:00 AM still, ceramic dust is never a great idea 06-Jun-20 11:28 AM my parents got a surprise visit at 5am today 06-Jun-20 11:28 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/1591447871152-D45BA.mov 06-Jun-20 11:32 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/image0-A8D69.jpg 06-Jun-20 12:52 PM Hahahahaha. And start engine number 2..... hmmmmmm..... why does the severe damage light come on during startup. Strange. Hahahahah 09-Jun-20 01:22 AM mbar! 09-Jun-20 01:22 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/15916909143167309686000364016785-ABEBD.png 09-Jun-20 08:24 AM yeah nobody says mb 09-Jun-20 08:24 AM always mbar 09-Jun-20 02:25 PM Boss is applying for a grant to produce 10,000 units of my COVID19 diagnostic device. Yikes! 09-Jun-20 02:27 PM You're making it sound like that's a bad thing 09-Jun-20 02:28 PM Well let's just say my engineering skill set is best suited for one-off proof-of-concept designs. Hopefully some experienced eyes will go over it with a fine-toothed comb... 09-Jun-20 02:29 PM oh, hehe 09-Jun-20 02:29 PM good luck 09-Jun-20 02:30 PM It's just the fate of the world in my hands. No pressure! 09-Jun-20 02:31 PM It will work out fine :) 09-Jun-20 03:17 PM @GigaSquirrel, my birthday was on Friday. My wife bought me a bunch of Ampelmann stuff from Berlin! 09-Jun-20 03:18 PM Yay! 09-Jun-20 03:18 PM Happy late birthday ❤️ 09-Jun-20 03:18 PM Also: Wrong city 09-Jun-20 03:18 PM I know 09-Jun-20 03:18 PM Nothing noteworthy in Munich apparently. 09-Jun-20 03:20 PM agreed 09-Jun-20 05:42 PM Munchen 09-Jun-20 05:42 PM Sounds like what I do when I'm snackin 10-Jun-20 01:06 AM :D 10-Jun-20 03:21 AM @Scotty first of all: Welcome! Look like the the thing you're trying to disprove is just a regular fusor? 10-Jun-20 03:25 AM Haha yep just with a big battery pack instead of high V low Current. I’m going at this with an open mind 10-Jun-20 03:25 AM also wow there's a lot of bs on that site 10-Jun-20 03:26 AM It’s very conflicted 10-Jun-20 03:28 AM I'll mark it down as bs and not care about it any further 10-Jun-20 08:01 AM y'all sure love plasma 10-Jun-20 01:16 PM Isn't that associated with the electric universe "theory"? 10-Jun-20 01:16 PM Probably more appropriate to say "thingy"... 10-Jun-20 01:16 PM I've just moved into a new apartment that has absolutely nothing in it, so I guess it'll be a good place to start building a lab that's somewhat neat and tidy 10-Jun-20 01:19 PM Oh. THAT 10-Jun-20 01:19 PM I was woken up by my upstairs neighbor walking around today, so that's not encouraging... I hope he'll like the noise when I inevitably screw something up on the lathe 10-Jun-20 01:20 PM I wish you the best of luck and good fun, @Scotty. Mind the potential accidental jolts. 10-Jun-20 01:37 PM I think I'll need some acoustic insulation panels all over the room and around the work bench with machinery on it. 10-Jun-20 01:37 PM I'd like to plaster the room in acoustic panels but I don't know how much it'll help with the creaking floorboard overhead 10-Jun-20 01:37 PM https://www.ebay.com/itm/USA-96-PACK-12-X12-X1-Acoustic-Foam-Panel-Wedge-Studio-Soundproofing-Wall-Tiles/332670793153 10-Jun-20 01:39 PM Those acoustic panels are super-effective against high frequencies 10-Jun-20 01:41 PM I'm not that worried about sound quality or echoes, I just don't want to hear everything my neighbor is doing. As it is now, I can hear his every footstep really clearly 10-Jun-20 01:41 PM It's those molded foam panels or rockwool panels 10-Jun-20 01:41 PM I'll probably put the rockwool around the noisy stuff. I'm sure I'll have some high frequency noise that needs to be blocked by the molded panels too (18000 rpm router spindle for example) 10-Jun-20 01:45 PM can't imagine setting up a home lab in anything other than a detached building, yikes! 10-Jun-20 01:45 PM or dedicated industrial space 10-Jun-20 01:46 PM Well I've got to work with what I've got 10-Jun-20 01:46 PM I have literally nothing in the room right now, no chair, no bed, no desks, no internet 10-Jun-20 01:46 PM So I'm essentially camping indoors for a couple of weeks before my stuff gets here 10-Jun-20 01:49 PM no internet 10-Jun-20 01:50 PM I'm in the public lounge area of the apartment complex right now. Waiting for Spectrum to send my modem over 10-Jun-20 01:52 PM I'm frantically refreshing my email wondering why chemistry and biology departments have started work today 10-Jun-20 01:52 PM but physics hasn't said anything 10-Jun-20 03:20 PM f 10-Jun-20 03:20 PM We start back up Monday 10-Jun-20 03:20 PM After bars 10-Jun-20 03:20 PM Totally not salty 10-Jun-20 03:33 PM it has been four weeks since bars opened here lol 10-Jun-20 03:33 PM ok, slightly over 3 weeks* 10-Jun-20 03:51 PM We started beginning of month, but let's be clear 10-Jun-20 03:51 PM According to the state packing in hundreds of people into bars is worth the risk for the economy 10-Jun-20 03:51 PM But my 4 person research lab is way too risky to do work 10-Jun-20 05:06 PM is it state? 10-Jun-20 05:06 PM I assumed in your case it was the university 10-Jun-20 05:23 PM State deciding who is expendable and who is not. 10-Jun-20 05:47 PM I wish my lab had closed down. I never got a day off during this pandemic! 10-Jun-20 05:52 PM Yeah whole pandemic has really increased my busy-ness 10-Jun-20 07:26 PM University takes marching orders from the state university system which takes marching orders from the governor 10-Jun-20 07:26 PM I wish we could have stayed open. It's been a not great 3 months 10-Jun-20 08:34 PM likewise 10-Jun-20 08:34 PM my DAMOP talk was alright I guess 10-Jun-20 08:34 PM 40 people watched ? 10-Jun-20 08:35 PM Could be worse 10-Jun-20 08:35 PM Also, pretty sure I'm going to have to spend a week catching up on what I was about to do :/ 11-Jun-20 09:42 AM Dang @samy https://www.nytimes.com/2020/05/21/science/chocolate-irisdescent-rainbow.html 11-Jun-20 10:00 AM oh ffs 11-Jun-20 10:00 AM https://web.archive.org/web/20200521011609/https://www.nytimes.com/1997/04/02/garden/where-no-candy-has-gone-before-light-as-the-secret-ingredient.html 11-Jun-20 10:00 AM they themselves have an article about this idea from 23 years ago, and yet in the one from this year they're like "people have been doing this for 2.5 years!" 11-Jun-20 10:42 AM haha nice! no pics it seems? even in non-archived version 11-Jun-20 10:55 AM maybe cause we were on dialup back then, dang 11-Jun-20 11:36 AM my family got "high speed" 1mbps in '99 and that was in rural Canada, surely NYT could host more 11-Jun-20 02:58 PM Pretty in 99 if I wasn't at school or the library, I was on dialup 11-Jun-20 02:58 PM I don't think I got DSL until 2001 11-Jun-20 05:23 PM yeah i don't even recall 56k dialup available in 97, at least with my isp...i was 11, and remember it was i think a year or two later that i got a faster modem and then found a software/firmware hack to upgrade it to 56k (payment/license restricted) 11-Jun-20 05:23 PM and getting a free freebsd cd set, promptly upgrading my mom's windows computer to freebsd...and could never get the x windows/gpu driver working, so it was permanently a console for the next few years 11-Jun-20 05:23 PM mom was pissed 11-Jun-20 08:28 PM Lol 12-Jun-20 07:49 AM Apparently, stupid people in Russia and Ukraine are not confined to Kreosan's YouTube channel. 12-Jun-20 07:49 AM The following is also a good introduction to Russian мат and related idioms. 12-Jun-20 07:49 AM https://www.reddit.com/r/Whatcouldgowrong/comments/gzk71j/wcgw_if_i_add_some_water_to_boiled_oil/ 12-Jun-20 07:52 AM :DDDD 12-Jun-20 10:21 AM last night recalled doing an air-gap interferrometer may actually be plasubile for inside of a micrometer, due to short range (I am somewhat designing a better mic) 12-Jun-20 10:31 AM Air-wedge shearing interferometer 12-Jun-20 10:31 AM or shearing one, which only uses one piece of 'glass' 12-Jun-20 01:00 PM building cooling water surged to like 300 PSI 12-Jun-20 01:00 PM water sprayed everywhere 12-Jun-20 01:00 PM RIP 12-Jun-20 01:30 PM I'm sorry. 12-Jun-20 01:30 PM If it's any consolation, it can always be worse. 12-Jun-20 01:30 PM https://blogs.sciencemag.org/pipeline/archives/2006/03/08/how_not_to_do_it_liquid_nitrogen_tanks 12-Jun-20 01:35 PM wow 12-Jun-20 02:48 PM As I got to teach one of my IH folks recently, nowhere in the acronym BLEVE, Boiling Liquid Expanding Vapor Explosion or Blast Leveling Everything Very Effectively, is there a requirement that things be flammable. They just need to go fast. Flammable just makes it a little more S P I C Y. 12-Jun-20 02:51 PM That electric cable is shiny because the room flooded 12-Jun-20 02:51 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/image0-C9D0C.jpg 12-Jun-20 03:06 PM Liquid nitrogen dewar punching a perfect circle through concrete like it’s the Kool-Aid Man. 12-Jun-20 03:06 PM Yeah..... 12-Jun-20 03:06 PM And... @idmb... ouch. How bad is the damage? 12-Jun-20 03:06 PM Also, I saw this, which made me think of @Addison-110m 12-Jun-20 03:06 PM https://www.cnn.com/2020/06/11/politics/spy-planes-george-floyd-protests/index.html 12-Jun-20 03:06 PM I love it. Turning ADS-B against the govt. to surveil them. 12-Jun-20 03:09 PM No “damage,” just a huge mess and have to shut everything off 12-Jun-20 03:09 PM Remember I’m not allowed to do science or preventative maintenance 12-Jun-20 03:09 PM I’m only allowed to come in and clean... 12-Jun-20 03:10 PM OK I might be a bit salty over being forced to spend $7k to replace a perfectly good transponder... so seeing the tables turned is good. 12-Jun-20 03:11 PM It’s some weird glycol mixture, so everything feels oily. Much more annoying to clean than water 12-Jun-20 03:14 PM Yeah there were a couple I watched visually as well, look up and there’s same plane kept flying overhead 12-Jun-20 03:14 PM Also the lack of anonymity caused by ADS-B now obsoletes the unofficial emergency procedure when you realize you’ve accidentally busted O’Hare’s airspace: turn off transponder, dive like hell, and fly low to land at the nearest non-towered airport. 12-Jun-20 03:15 PM The what? 12-Jun-20 03:17 PM It used to be that all transponders squawked 1200 by default. So if you’re on a VFR flight without a flight plan or ATC flight following, you were anonymous. 12-Jun-20 03:17 PM And if you accidentally lost track of altitude and climbed into airspace where you shouldn’t be, turning off your transponder, diving, and flying low to a non-towered airport would make it hard for ATC to track you and bust you. 12-Jun-20 03:17 PM (Of course that’s also illegal af but if they can’t catch you....) But now every aircraft with ADS-B is squawking a unique code that’s tied to its tail number. So If you bust airspace, there’s nothing you can do to hide.... 12-Jun-20 03:20 PM Oh my 12-Jun-20 03:30 PM Usually ATC doesn’t waste time issuing citations for brief, accidental incursions. Now if they have to divert an airliner because of said incursion, that’s a different matter. 12-Jun-20 03:30 PM Or if it’s Washington DC, or a presidential TFR, you can also expect a fighter jet intercept, directing you to land at an airport with an armed welcoming committee. 12-Jun-20 03:42 PM Also, there’s the get out of jail free card, a.k.a. the NASA form. 12-Jun-20 03:42 PM If you break a rule accidentally, you can write up the situation and self-report it. They analyze this data for air safety purposes. What you put in the form can’t be used against you in an enforcement action, and should an enforcement action happen, even if there’s a finding of fault, if you voluntarily reported it first, they generally can’t punish you. 12-Jun-20 03:42 PM This doesn’t hold if someone gets killed, or if it was clearly deliberate. They won’t buy it that a concrete block accidentally fell out of the aircraft when you were flying at low altitude over your ex’s house, or that you got disoriented because you accidentally ingested a considerable amount of whiskey before takeoff. 12-Jun-20 03:48 PM Sounds a bit like nuclear reactor event reports. Things are a lot less bad if reported quickly and properly 12-Jun-20 03:49 PM Graphite blocks in the parking lot? What graphite blocks in the parking lot? 12-Jun-20 03:51 PM Usually more of the operator knucklehead stepped out of the control room for 30s during startup and forgot to take the key out 12-Jun-20 03:53 PM So, I forgot to ask.... does work from home mean they let you take the TRIGA with you? 12-Jun-20 03:55 PM Unfortunately not, and it didn’t help that the (now potentially previous) director may have mis reported things to the NRC and their enforcement actions pretty much happened right at the same time everything else shut down 12-Jun-20 04:36 PM Oh no. 13-Jun-20 06:50 AM crazy thing is you could attach an SDR to a drone (could be ground based) to transmit your own ADS-B and..."assist" ATC, controlling the flow and landing of aircrafts a bit 13-Jun-20 09:09 AM want to draw stuff on those maps? 13-Jun-20 09:09 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/image0-CD116.jpg 13-Jun-20 09:39 AM @samy That is an excellent way to tempt terrorism charges. The FAA takes a dim view of such things. 13-Jun-20 09:41 AM @funranium that's unfortunate for anyone who tries. my interest lies in the fact that it's so trivial for someone with bad intentions to perform 13-Jun-20 09:41 AM the only protection mechanism being the potential legal ramifications, which of course a bad actor could skirt 13-Jun-20 09:59 AM interestingly the pic @N00N posted could actually be all that's needed to perform the attack (+ power and a wire) 13-Jun-20 09:59 AM (i'm also really interested in what-ifs 13-Jun-20 09:59 AM looks like even the slowest, very first Pi and Pi Zero/W (BCM2835) has a clock manager (GPCLK) where PLLC can reach 1GHz, and then higher while overclocking, so can reach either 978MHz or 1090MHz for either ADS-B signal, and one of the GPCLK pins is exposed and can be tied to DMA to output pre-calculated signal to PWM 13-Jun-20 09:59 AM so tying a wire as the antenna to that specific pin and configuring like so, you could generate the signal...crazy. wonder if you can receive through it as you could create an ADS-B receiver with any version of raspberry pi without any extra hardware other than a single wire 13-Jun-20 10:10 AM I don't think it's quite as easy 13-Jun-20 10:11 AM how so? 13-Jun-20 10:20 AM Just the receiving radio signals part I feel like you’d need something else, it doesn’t sit right unlike the transmitting which is totally reasonable 13-Jun-20 10:24 AM it has LASER 13-Jun-20 10:24 AM and RPi 13-Jun-20 10:24 AM and maybe it works in a b-tub 13-Jun-20 10:34 AM @Addison-110m yeah, it probably can't receive/sample at that rate, not sure yet, and you can't reconstruct perfectly due to Nyquist theorem, but you could take advantage of the repetition and checksum 13-Jun-20 10:50 AM Seems like a lot of work when you could just toss a sdr on there 13-Jun-20 10:57 AM yup. for me, expanding the functionality of something that previously was limited can be fun 16-Jun-20 12:37 PM https://bioe.uw.edu/meeting-the-need-for-covid-19-test-kits-pivoting-from-seattle-flu-study-and-developing-new-rapid-tests/ 16-Jun-20 12:47 PM (I'm the "detector designer") 16-Jun-20 01:08 PM yay, I wish I had cool stuff to do like that 16-Jun-20 01:14 PM @piGuy awesome! 17-Jun-20 09:58 AM It surprises me how few docker container escape exploits I've seen, based on how new and well adopted the technology actually is. Maybe it's something to research? 17-Jun-20 10:34 AM @LRM regarding my plan for a 1 gram quadcopter, I intend to use single phase brushless motors. I've been learning how to build them. I made one that is approx 160mg. 17-Jun-20 10:37 AM That is a pretty tiny motor, have not looked into making motors yet. Was throwing around some ideas about making a micro indoor flying plane and thats about the scale that seemed reasonable 17-Jun-20 10:37 AM Seems like there are commercial receivers around 0.5g and I don't think I want to get into the custom radio gear side of things 17-Jun-20 11:09 AM https://fishpepper.de/projects/usky/ 17-Jun-20 11:09 AM That one is .37g, though you do have to make it yourself 17-Jun-20 11:22 AM Do you have a link to any motor building info to save me some time hunting it down myself? 17-Jun-20 11:22 AM Had not seen those FrSky receivers...might finally get me to make the switch from the dsm2 module i have had for years 17-Jun-20 11:24 AM This thread on RCGroups has the best information. Not exactly organized though. https://www.rcgroups.com/forums/showthread.php?596219-Brushless-motors-in-the-mg-range 17-Jun-20 11:26 AM Thanks! 17-Jun-20 10:10 PM sounds like a really cool project! it might make sense to use a SoC to combine the flight controller MCU and receiver if the MCU needs to be laid down anyway 19-Jun-20 05:54 AM https://twitter.com/Applied_Ion/status/1273960191994793985 19-Jun-20 05:54 AM Just some help for an unlucky vacuum pump user. ^^ 19-Jun-20 08:22 AM neat 19-Jun-20 10:04 AM Saw his struggles with that pump...gotta wonder what was up that the ultimate pressure got worse after he rebuilt it... sounds like he decided to just get a new one? 19-Jun-20 01:11 PM I left behind a Welch 8915 pump for him that also needed rebuild. I had no need for 3 foreline pump and knew he had issues with pumps before. I thought the condition of the Welch direct drive pump was bad, but it couldn't even compare with the condition of that Edwards pump 19-Jun-20 01:11 PM Really unlucky there 19-Jun-20 01:20 PM Personally, If I was in his situation, I would probably buy cheaper pump than Edwards. We recently bought two stage rotary pump from local manufacturer (based in Czech Republic, they make RVs since 1960, no chinese crap), 16 m3/h for ~1500 USD... 19-Jun-20 01:23 PM I used to go with the approach of getting $30 to $100 pumps and just hope they're good. Worked for me twice but not the third time 19-Jun-20 01:23 PM Fore sure not everyone will have 1500 USD to spend on pumps, that's the price for a new one @bkralik ? 19-Jun-20 01:36 PM Yes, new one. I agree with you, If I need some pump, I would probably go to nearest technical university and ask at plasma/surface physics department. According to my experience, they have plenty of old pumps in basement (as most of them switched to oil-free) and will be happy to help with some interesting home project... 19-Jun-20 01:37 PM I forgot to do that... Should've left school with at least a Welch pump or something... 19-Jun-20 01:48 PM I've said it a bunch but yeah - anyone local would have good odds getting a good working rotary vane. Specifically the small 3 phase ones - those are extra useless to us. 19-Jun-20 02:23 PM Took me a couple tries with eBay stuff but by only looking at local listings I never lost any money on pumps that turned out to be bad...and then scored two pretty solid D2.5E for $70 heh 19-Jun-20 02:23 PM Only really bad eBay pump experience was one that had a bunch of mercury inside it but the seller refunded me without any hassle 20-Jun-20 08:17 AM you guys are awesome 20-Jun-20 06:09 PM I bought 3 used pumped off eBay and ended up with 2 complete duds needing rebuild, Edwards RV8 was one, Alcatel 2008AC was another. Then I got another Alcatel 2008A this thing had seals on it like it was a fresh rebuild and it looked spotless... Well that fresh rebuild was done probably in the 90s... so it ran great until the main cork seal failed... so now that needs a partial rebuild to freshen up all the seals probably... Then I got a pallets worth of Leybold roughing pumps, anywhere from D2.5E up to like D16Es... and its like a 50/50 split of ones that pump OK and just needed partial rebuilds and ones that were super bad and probably need a major rebuild or don't have life left at all... Frankly if I were to do it again, considering the scope and length of most vacuum projects and the money that goes into them I'd be more selective with used pumps, really be careful with price and if I wanted something for a project and not want to fuss with it, buy professional referb or new. 20-Jun-20 06:09 PM Like don't get me wrong, there are good deals to be had, again like the one pump I got for like 150~ bucks? which looked like it was a fresh rebuild... even after a partial rebuild kit which will run me like 150~ bucks, 300 bucks in for basically a fully fresh rebuilt pump is great. 20-Jun-20 06:09 PM But that was after two pumps of just "buy and pray" that third pump I hunted for and found it looked nice and was local pickup and I drove the 1:30 to pick up 20-Jun-20 06:09 PM Rebuilding kits for pumps wildly range depending on brand too 20-Jun-20 06:09 PM most people just want to go for Edwards because its a big name but frankly, any big name rotary vane pump made in the last 20-30 years is a fantastic design. There are things here and there that may be better or worse but here is my 2 cents... Edwards pumps are a TON more expensive on the second hand market... Your going to pay 300-500 for a used probably needs rebuild pump... Where as an Alcatel/Leybold you may pay 100-200~... And the rebuild kits seem much more complex (I haven't rebuilt one before so I can't say for certain) and they are generally more expensive... 20-Jun-20 06:09 PM A full major rebuild kit for most Alcatel/Leybold pumps as I have searched for since thats mostly what I own, is around 175-275~ range 20-Jun-20 06:09 PM Which is fantastic if you get the pump for 100~ 20-Jun-20 06:09 PM And if you get so unlucky as to have a pump so far gone its not even rebuildable you at-least are only out 300~ bucks or so total, and if you can find another of the same model for say 100~ bucks you could probably realistically save the rebuild kit if you pull it back apart quickly and you didn't damage anything in the process. 20-Jun-20 06:09 PM But getting an edwards used second hand again in that 300-500 range is rare, Alcatel/Leybold? seems like there are pallets of them out there. 20-Jun-20 06:09 PM I also know a chip fab location and I don't think they own a SINGLE Edwards rotary vane... So they aren't as prolific as some seem to make them to be IMO. 20-Jun-20 07:31 PM please someone come to vancouver and beg me for an edwards 40 20-Jun-20 07:31 PM we have twice as many rotary vanes as diffusion pumps 20-Jun-20 07:31 PM which of course makes no sense 20-Jun-20 07:33 PM Which Vancouver 20-Jun-20 07:33 PM the real one 20-Jun-20 07:33 PM Drat 20-Jun-20 07:33 PM the one that plays the other one in movies 20-Jun-20 07:33 PM 50 shades of gray: filmed in Vancouver BC, takes place in Vancouver WA. 20-Jun-20 08:26 PM fwiw you don't need to hold yourself to surface science stuff. Our chemistry department has a closet full of rotary vanes, and we only have one surface guy. Most of them probably need rebuilds, but they're beefy pumps. Mostly Edwards and Leybold iirc 20-Jun-20 08:26 PM Also, if you happen to catch someone retiring, that's also a great way to get old but really good electronic stuff on the cheap 20-Jun-20 08:26 PM Like, when the guy across the hall retires, he'll probably have 10-20 digital delay generators with ~picosecond jitter 20-Jun-20 08:34 PM they probably don't need rebuilds, do they? 20-Jun-20 08:34 PM The ones in ours? Yeah, they do 20-Jun-20 08:34 PM At least we've never found one that didn't need a partial rebuild 20-Jun-20 08:34 PM ours literally come from "grad student graduates -> equipment sits unused -> new grant replaces the system with oil free pumps -> they go to the closet" 20-Jun-20 08:34 PM They were run to the ground, but they still work 20-Jun-20 08:34 PM I think we're more hoarders here than you guys 20-Jun-20 08:34 PM Though we're probably going to get a really fancy cryo water pump from the surface guy that retired 20-Jun-20 08:34 PM So that's cool 20-Jun-20 08:35 PM we have three closets that are 2mx1m to store allllll our extra stuff 20-Jun-20 08:35 PM but it's dense. I played solidworks tetris. 20-Jun-20 08:35 PM Well, part of our problem is that the building is from the 50s 20-Jun-20 08:35 PM And they store that stuff in the room with the worst climate control 20-Jun-20 08:35 PM So even if they were fine when they were stored, they aren't now 20-Jun-20 08:35 PM Also by and large we still use oil pumps ourselves, so we tend to keep the especially good ones 20-Jun-20 08:35 PM The oil isn't a big deal for gas phase stuff 20-Jun-20 08:37 PM do you have a CAD file of your assembly? 20-Jun-20 08:37 PM Assembly of what? 20-Jun-20 08:37 PM helium droplets 20-Jun-20 08:37 PM optics 20-Jun-20 08:37 PM lab 20-Jun-20 08:37 PM Droplet yes, optics not as far as I know 20-Jun-20 08:37 PM Lab no, but the lab is also just two droplet instruments that we should have cads of for both 20-Jun-20 08:37 PM I was thinking about making a optics cad though 20-Jun-20 08:38 PM optics CAD is simple for me since it's just "centrifuge shaper" 20-Jun-20 08:38 PM everything else is eh 20-Jun-20 08:39 PM It's mostly the same for us. Light source 1, light source 2, and light source 3 20-Jun-20 08:39 PM And it's mostly steering optics 20-Jun-20 08:39 PM We have something for the fancier OPO somewhere though 20-Jun-20 08:39 PM That one is non trivial with all the meters and what not 20-Jun-20 08:42 PM we have a weird thing 20-Jun-20 08:42 PM where we have two centrifuges from two different laser sources 20-Jun-20 08:42 PM made with different focal lengths and different grating densities 20-Jun-20 08:42 PM but the adjustable parameter in each stretcher 20-Jun-20 08:42 PM happens to be 30cm for each 20-Jun-20 08:49 PM Weird 20-Jun-20 09:11 PM magic 21-Jun-20 12:53 PM Anybody have a part number or a wiring diagram? Google does not find me anything on the numbers on the Jack itself. It’s for a Turbovac 360 to this NT150/360 VH controller. I have it and the pump but no cable 21-Jun-20 12:53 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/image0-52D3B.jpg 21-Jun-20 12:58 PM @Charles I think we have that cable, I will check it tomorrow and if I find it, I will make a wiring diagram... 21-Jun-20 12:59 PM Thanks. Otherwise this thing appears to be in working condition. Looking inside. The main filter caps could probably use a change but otherwise it looks fine. 21-Jun-20 01:20 PM That connector looks the same as my leybold 1000C 21-Jun-20 01:20 PM Which I believe the manual for the turbotronik had a diagram? 21-Jun-20 02:46 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/unknown-58575.png 21-Jun-20 03:58 PM The manual posted has sections 6 and 7 cut out which would contain the diagram. The pump end is shown in another location but the controller end is not. 21-Jun-20 03:58 PM Sneaky sneaky. Hahaha 22-Jun-20 01:55 AM https://www.youtube.com/watch?v=R5lLe-vmE6E 22-Jun-20 11:34 PM got a teensy 4.1 working with ethernet 22-Jun-20 11:34 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/attachment-33CA0.png 23-Jun-20 04:28 PM https://twitter.com/ademrudin/status/1274803364803403776 23-Jun-20 06:02 PM Oh damn, talk about public health hazard 23-Jun-20 06:02 PM Had to take a freaking course at work to be allowed within a 5ft radius of any beryllium 23-Jun-20 06:02 PM Incidentally, new bike day! 23-Jun-20 06:02 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/32b4e0efd58417a745a0e7f7c818be2b-53E73.jpg 23-Jun-20 06:02 PM I don't think bikes really get any faster when its weight is below 8kg 23-Jun-20 06:02 PM This Specialized Roubaix is 8.7 kg as it is, probably will drop it down to ~8.4 kg with new pedals, lighter chainring, taking out spacers under the handlebars 23-Jun-20 06:02 PM Unfortunately the rubber/gel pads they put in the fork and seat stays did not do much on gravel 23-Jun-20 06:02 PM I can feel the difference between 5-10 psi in the tires much more than having these little things there 23-Jun-20 06:02 PM So it's a road bike afterall 23-Jun-20 06:02 PM I'm actually curious about the suspension spring in the head tube in the newer Roubaix models. It can be locked out on the latest one, which is a massive design improvement 23-Jun-20 10:02 PM bike 23-Jun-20 10:02 PM I started riding for the first time in like a decade this month 23-Jun-20 10:02 PM up and down the hill to the university 24-Jun-20 10:06 AM @Mezmorizor I thought things were going well in our lab but one of these split randomly after a year of use and sprayed glycol everywhere: https://www.mcmaster.com/4912K93 24-Jun-20 10:06 AM Oh no. New nightmare 24-Jun-20 10:20 AM What does "split" mean in this context? Obviously nothing good 24-Jun-20 10:35 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/image0-DA4E1.jpg 24-Jun-20 10:35 AM top one was the culprit, I did the usual of tightening a bit to see if it fixed the seal but it made it worse. bottom wasn't leaking but you can see a crack in the same spot.. 24-Jun-20 10:57 AM Ahh was wondering if it was something related to the threads or if you had a valve stem crack or something. Hopefully those are the only two with cracks! 24-Jun-20 11:05 AM I'm pretty sure it is too much teflon + overtightening but wow 24-Jun-20 03:40 PM gofundme to buy Argonne when 24-Jun-20 03:45 PM now we're talking 24-Jun-20 03:46 PM Yas 24-Jun-20 03:46 PM https://fpdcc.com/site-a-the-worlds-first-nuclear-reactor/ 24-Jun-20 03:46 PM It looks like there was additional cleanup effort ca. 1997. 24-Jun-20 03:46 PM So I’m very curious about what is left, and if it’s still possible to find anything. 24-Jun-20 03:46 PM https://www.chicagotribune.com/opinion/commentary/ct-opinion-flashback-red-gate-woods-nuclear-site-20200124-ufrit3rmyrd4pe43ibyyphunam-story.html 24-Jun-20 03:46 PM Apparently there was a discovery in 1990. But it sounds like DoE cleaned it up. 24-Jun-20 04:11 PM https://www.chicagoreader.com/chicago/here-lies-the-worlds-first-nuke/Content?oid=870570 24-Jun-20 04:11 PM A 1987 article describing the state of the site before the 1995-97 cleanup. It goes into details of isotopes and activity levels. Again, I’m wondering if there’s anything still of interest there (not requiring jackhammers and excavation equipment). 24-Jun-20 04:14 PM Sounds like a use for a large scintillator 24-Jun-20 04:17 PM More info: 24-Jun-20 04:17 PM In May 1990, the Illinois Department of Nuclear Safety conducted routine oversight monitoring at Site A and uncovered debris, which included a piece of uranium metal. They concluded that this area was a forgotten sanitary landfill that had been exposed by natural weathering of the area. 24-Jun-20 04:18 PM dang 24-Jun-20 04:18 PM <- that was from https://www.lm.doe.gov/SiteA_PlotM/Site_A_Plot_M_History_Fact_Sheet.pdf 24-Jun-20 05:00 PM @nmz787 nice, what are you doing with the teensy? 24-Jun-20 05:08 PM And another in-depth report on the sites: 24-Jun-20 05:08 PM https://www.osti.gov/servlets/purl/10170073 24-Jun-20 05:10 PM The link is broken for me 24-Jun-20 05:11 PM Weird.... 24-Jun-20 05:11 PM https://www.osti.gov/biblio/10170073 24-Jun-20 05:11 PM There..... 24-Jun-20 05:13 PM Still, page not found 24-Jun-20 05:14 PM The site itself gave it to me as a shareable link.... 24-Jun-20 05:14 PM Can you share the title of the report? 24-Jun-20 05:18 PM those links work for me 24-Jun-20 05:19 PM Don't work for me either 24-Jun-20 05:21 PM Tried VPNs, didn't help. Weird website 24-Jun-20 05:23 PM Probably a weird browser/OS combo thing. Sadly we've regressed back to the IE6 days and you can't rely on websites working for anything but chrome+windows 24-Jun-20 05:24 PM Yeah it works on Microsoft Edge for me 24-Jun-20 05:24 PM But how much my web browsing experience has deteriorated in the past decade despite having internet an order of magnitude faster and orders of magnitude more processing power is a complaint for another day. 24-Jun-20 06:13 PM the first website is doe.gov?! 24-Jun-20 06:13 PM weird website? lol 24-Jun-20 06:13 PM or do you just mean the osti.gov 24-Jun-20 06:13 PM which is still a government site 24-Jun-20 06:13 PM shouldn't be "weird" lol 24-Jun-20 06:14 PM sometimes osti.gov gives me issues but it is usually related to noscript I have found 24-Jun-20 06:14 PM Although I guess some government sites are poorly made 24-Jun-20 06:18 PM Directly from the DOE website on Chrome 24-Jun-20 06:18 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/unknown-E4EA1.png 24-Jun-20 06:18 PM On the OSTI website it only works for me on Microsoft Edge, and when I download the report most of the pages are blank in the browser preview 24-Jun-20 06:20 PM uh... hrm... your clock is accurate on your system and or your browser is up to date right? 24-Jun-20 06:20 PM Of course 24-Jun-20 06:20 PM an ssl error like that implies well... what it says 24-Jun-20 06:20 PM hrm 24-Jun-20 06:20 PM stupid, but try edge or explorer? 24-Jun-20 06:20 PM (assuming your on windurp) 24-Jun-20 06:20 PM Both sites work on edge 24-Jun-20 06:20 PM ah... yea ok thats uh 24-Jun-20 06:20 PM chrome problem than lol 24-Jun-20 06:21 PM I also tried on ubuntu 20.04 on Firefox, both sites work 24-Jun-20 06:21 PM I opened all of the links on chrome 24-Jun-20 06:21 PM but chrome is up to date for me 24-Jun-20 06:21 PM I've got the same issue on firefox with the doe site 24-Jun-20 06:23 PM I just have dead links on both on firefox 24-Jun-20 06:23 PM 404 for Doe, unexpected error for osti 24-Jun-20 06:23 PM err, second is 404 24-Jun-20 06:23 PM No idea why I thought doe 24-Jun-20 06:24 PM Yeah dead links on both sites for Firefox on Windows, but both works on Firefox in Ubuntu 24-Jun-20 06:24 PM lol 24-Jun-20 07:54 PM https://www.sciencemag.org/news/2020/06/lawsuit-alleges-scientific-misconduct-us-nuclear-weapons-lab 24-Jun-20 08:24 PM Oh dear. 24-Jun-20 08:52 PM He is representing himself RIP 24-Jun-20 08:58 PM Against a major national lab, which has all the documents... Kinda explains his choice to represent himself, because this story itself is the win he's looking for 24-Jun-20 08:58 PM No sense in wasting money on a lawyer 24-Jun-20 08:58 PM He may be right in his judgement, but at this point I expect only him and his supervisor will know the truth 24-Jun-20 08:58 PM Fitting simulation parameters to experiment results is a very normal thing to do, the key difference is just the motivation: to correct the algorithm or to make the existing algorithm look good and not make any true corrections 24-Jun-20 09:04 PM His allegations are interesting...impossible to know enough about what exactly was going on there to know if it was reasonable or not without documents but the relevant stuff is probably never going to be seen by the public 24-Jun-20 09:04 PM Proving that allegation will be incredibly hard in his position 24-Jun-20 10:17 PM @samy working with a team doing nanopore sensing, the teensy (for now) is gonna orchestrate the 16 ADC readings via SPI, mayybe do a minor amount of data pruning, and then send the data over Ethernet to some server for long term retention and machine learning data analysis 25-Jun-20 10:35 AM i've been switching a bunch of my teensy/arduino projects to particle photons with a custom tcp server for serial communication...has been really nice as they all join wifi, i flash them through wifi and then netcat for 2-way serial without having them near me or connected to computer (especially useful for the motorized projects) 25-Jun-20 10:35 AM will see if someone's implemented mDNS next or implement that so they can be named rather than accessing them individually by MAC 25-Jun-20 09:10 PM huh we're required to have hand sanitizer at every door 25-Jun-20 09:10 PM and it's $40/litre from the department store 25-Jun-20 09:46 PM Can you just cook up your own? The WHO released a recipe months back 25-Jun-20 09:46 PM I'm still just using 90% drinking alcohol here, refilled in my old sanitizer bottles 25-Jun-20 09:46 PM No thickener 25-Jun-20 09:46 PM When times get really rough, I can sanitize my hands and my thoughts ;) 26-Jun-20 07:07 AM :)) 26-Jun-20 03:22 PM i'd like to get a motorized telescope (this would be my first). something that's a starter but that i could upgrade and augment in the future without having to buy a whole new one. any suggestions? 27-Jun-20 05:21 AM I got an excellent deal on a Meade LX200 8” Schmidt-Cassegrain. 27-Jun-20 05:21 AM I’m not sure what you mean by upgrade. 27-Jun-20 05:21 AM Upgrading eyepieces, filters, etc. and adding accessories like CCD cameras? Sure. 27-Jun-20 05:21 AM But, at least in my case, the mount and telescope are essentially integrated. I can’t just swap out the mirror and tube for a larger one. 27-Jun-20 08:14 AM ahh 27-Jun-20 09:19 AM I remember a big reddit post about making them, with options at a bunch of price points to buy vs build... Can't find it 27-Jun-20 09:19 AM I believe they're far into the "these are a pain to align + ship as ready-to-use" gear, and that DIY stuff from kits works out much better?... 27-Jun-20 10:13 AM I also forgot to mention: mine is pretty old and used. Surplus from a planetarium educational program. 27-Jun-20 10:13 AM Also, think about size. 27-Jun-20 10:13 AM I... didn’t.... 27-Jun-20 10:13 AM I was originally bummed out that I didn’t get the 10” scope. 27-Jun-20 10:13 AM That was before I tried lugging the 8” scope in its case up and down 3 flights of stairs. 27-Jun-20 10:51 AM haha i see 27-Jun-20 10:51 AM @idmb yeah that would be very cool. started making lapping plates (not for any particular reason other than flatness is interesting). going camping next weekend and trying to determine some fun things to do 27-Jun-20 01:52 PM tbh if you're just looking for fun low-light-pollution things to do, learn astrophotography 27-Jun-20 01:52 PM Can do exceptionally well with basically nothing 27-Jun-20 02:13 PM @idmb being in L.A. Samy is gonna have a hard time with that unless he takes at least a few hours road trip away from home 27-Jun-20 02:15 PM I’m in a similar situation. An 8” Schmidt-Cassegrain should be an awesome amateur scope... except if you live in Chicago.... 27-Jun-20 02:19 PM Yeah, I check the dark sky finder map pretty often to cross check real estate 27-Jun-20 02:19 PM There's like one spot near you, halfway between Chicago and Milwaukee... And it's not even that dark, but it's the darkest within like a couple states. 27-Jun-20 03:05 PM I assumed camping meant leaving the city 27-Jun-20 10:22 PM haha it does, but i'd want to make sure i don't get a one-time use thing 28-Jun-20 12:27 AM Ah,i failed to connect going camping with getting a telescope, oops 28-Jun-20 12:27 AM @samy have you been to deep creek hotsprings? Just east of Victorville 28-Jun-20 12:27 AM It sets the standard for hot springs in my book 28-Jun-20 09:20 AM but a not one-time-use thing would be a regular camera (mirrorless or DSLR) with a fairly regular lens! 28-Jun-20 09:20 AM it just wouldn't be great for astro in the city 28-Jun-20 11:34 AM @nmz787 i haven't, interesting, checking that out 28-Jun-20 04:29 PM if you're moving everything into a storage unit, palletizing it is surprisingly useful and worthwhile, at least if you already have a pallet jack 28-Jun-20 04:29 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20200628_153623-46822.jpg 28-Jun-20 04:29 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20200628_153630-114E9.jpg 28-Jun-20 05:45 PM Yes. I am moving soon and already plan on using this method. 28-Jun-20 06:09 PM Wrap it with plastic too for my OSHA senses to stop tingling 28-Jun-20 09:51 PM yep, planning on doing that 30-Jun-20 05:29 PM Congrats - my university has locked me out of the main door to a building I sometimes need to enter, but I can get to it by going through another building's tunnel 30-Jun-20 07:57 PM @nmz787 you may have seen https://twitter.com/PaulStoffregen/status/1278091137316614144 30-Jun-20 08:11 PM @samy yeah he posted it on a forum thread I created on his site about the wiring diagram/schematic that I reverse engineered from the PCB file on oshpark and the Ethernet jack datasheet. Unfortunately for me, I already ordered 6 PCBs and associated digikey parts... For around $10/each, while Paul is charging like $3.40 for the same (well he changed the specific model of the Ethernet jack, but yeah, that's what kind of discount you get with ordering 1000 of everything) 30-Jun-20 08:13 PM ahh, at least you can have a nice sense of creative satisfaction with yours 30-Jun-20 08:13 PM which i think is worth the $! 01-Jul-20 02:31 PM oh, the teensy 4.1 has native ethernet :o ooh 01-Jul-20 02:49 PM i have a 160 port modular ethernet switch that i've kinda wanted to jury-rig PoE into and use as a backplane for a massive sensor network, maybe the teensy 4.1's a bit overkill for that though 01-Jul-20 03:16 PM Doesn't ESP32 have a ethernet MAC? Just add a cheap PHY. 01-Jul-20 03:50 PM oh, so it does :o 01-Jul-20 03:52 PM Also, the ubiquitous SMSC PHY NEEDS the activity leds to work, even if the datasheet tells you othervice. 01-Jul-20 03:52 PM Seen that encountered at least twice now 01-Jul-20 03:52 PM IIRC it just refuses to init without the leds. 01-Jul-20 03:52 PM At least in the designs I have encountered. 01-Jul-20 04:01 PM https://www.youtube.com/watch?v=v3-a-zqKfgA neat video 02-Jul-20 08:07 AM mcmaster has refunded me for my exploding valves... hurrah? 02-Jul-20 10:19 AM WHY does my temperature controller have a DTE RS232 plug? 02-Jul-20 10:19 AM my cold head compressor does too 03-Jul-20 01:21 AM https://www.youtube.com/watch?v=-2QaTyDJDEI I'm not sure what to think about this guy... He does some nice demonstrations, but esp. in this video he explains them very badly (imo) 03-Jul-20 01:21 AM spends 20 minutes to explain lorentz force and then expects people to know how a tokamak works and what confinement time is 03-Jul-20 01:21 AM and then ofc there are his recent gas chamber videos 03-Jul-20 01:53 AM hus latest video is... quite something 03-Jul-20 10:00 AM https://twitter.com/funranium/status/1276935887712956416?s=21 03-Jul-20 10:00 AM I wanted to chat horology with @funranium and @Noxz 03-Jul-20 10:00 AM My understanding is that over winding a watch is a myth. One cannot break a functional watch by winding it slowly and completely by hand. Watches want to be kept near fully wound. 03-Jul-20 10:00 AM I love the watch.... 03-Jul-20 10:06 AM Overwinding in my mind has always meant cranking it harder than your supposed to. Basically you just wind it until you feel a strong resistance and stop... 03-Jul-20 10:06 AM This was more of an issue on things like clocks or pocketwatches where you have larger winders and as such an easier time to crank it harder than your supposed to 03-Jul-20 10:06 AM though the thing is winding to its max can fatigue the center attachment point in the mainspring barrel 03-Jul-20 10:06 AM thats generally where the things snap 03-Jul-20 10:07 AM Also, I’d be a bit concerned about running it. If the gaskets have degraded to the point that it admits moisture, it probably hasn’t been serviced in a very long time. The lubricants could have dried out, in which case you’re running the pivots against the jewels dry, and liable to damage them. 03-Jul-20 10:08 AM though its going to take a long time to do so and replacing a mainspring is a trivial task if your in there for normal maintenance, cleaning/oiling, anyway 03-Jul-20 10:08 AM Well yea, I'd get any old mechanical watch serviced before using it 03-Jul-20 10:08 AM so long as you use synthetic oils they can go for like 3 years or so~ 03-Jul-20 10:08 AM organic oils, which cost about 1/3rd of the synthetics, only last about a year apparently on the shelf 03-Jul-20 10:08 AM so it would go to say they only last about a year in the watch 03-Jul-20 10:09 AM Yeah. If the mainspring breaks on a full wind, the solution is to replace it, not wind it partially.... 03-Jul-20 10:09 AM so if you have a 20 year old watch and pull it out of the drawer... well... get it serviced first if you care about it 03-Jul-20 10:09 AM if its just an invaluable thing and it keeps time enough for you to play with it and wear it for a year before tossing it or something, whatever I guess? 03-Jul-20 10:09 AM ? I think you missed my point 03-Jul-20 10:09 AM my point was that your understanding of "overwinding is a myth" is partially correct and partially incorrect 03-Jul-20 10:09 AM if you know how a mainspring works its attached to the outer section of the mainspring barrel and as you wind it pulls it in... so if you wind it to its max and put too much force at that max point too many times you can end up fatiguing the spring at that attachment point possibly 03-Jul-20 10:09 AM will it fail as soon as you "overwind it" no... will it fail in 10 years instead of 15.... who knows but thats more likely the case 03-Jul-20 10:12 AM @rdpierce hi -- we had our first week of school for summer quarter - ON CAMPUS! 03-Jul-20 10:12 AM No, I think we’re on the same page.... mainsprings are consumable parts. 03-Jul-20 10:12 AM Over winding isn’t possible unless you are using a pliers.... turning it by slowly by hand until it stops moving shouldn’t place it beyond its design tolerances. 03-Jul-20 10:13 AM overwinding is no longer an issue, especially with automatic watches where the spring slips on the wall of the barrel, but old stuff could 'set' if it stayed in full wind for too long, or simply not tempered enoguh (too brittle) 03-Jul-20 10:13 AM I dont think overwinding has been possible since the 30s or 40s, heh 03-Jul-20 10:14 AM Cool, @Noxz!!! Are you able to take a look at my sick Polimaster quartz movement? 03-Jul-20 10:15 AM Yes, I think so! 03-Jul-20 10:15 AM I wanted to give it at least one week before I reached out to you 03-Jul-20 10:15 AM incase they had us return immedietly 03-Jul-20 10:16 AM At this point, the watch is gathering dust anyway. The Geiger counter works, but I would confuse myself to no end wearing a watch with a stopped movement just for the Geiger counter.... 03-Jul-20 10:16 AM fair enough, most of my experiences are with 1900~s pocket watches :) 03-Jul-20 10:17 AM pocket watches can break mainsprings all the time 03-Jul-20 10:17 AM it is one of the reasons geneva stops were made 03-Jul-20 10:17 AM and to prevent unwinding at an unusable low amplitude state 03-Jul-20 10:22 AM My check source acquired at a Berlin street market: 03-Jul-20 10:22 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/image0-C105B.jpg 03-Jul-20 10:22 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/image1-9E548.jpg 03-Jul-20 10:22 AM The rear case features engine turning, which was a really cool coincidence as there was an exhibit about it at the Deutsche Technikmuseum. 03-Jul-20 10:25 AM I've taken eengine turning classes 03-Jul-20 10:25 AM was nearly about to buy a straight line machine from switzerland, but someone else stepped in 03-Jul-20 10:25 AM I may make my own 03-Jul-20 10:26 AM Finding it was interesting. Bionerd handled negotiations with seller, and she wasn’t amused when I wasn’t surreptitious enough with my Geiger counter and the seller noticed, almost certainly raising the price. 03-Jul-20 10:26 AM relatively simple, most complex part is really the ratcheting system for advancing a set amount to he right/whatever every time 03-Jul-20 10:33 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/image0-70169.jpg 03-Jul-20 10:35 AM do you know the maker? 03-Jul-20 10:35 AM usually a stamp under/around the balance 03-Jul-20 10:35 AM and two screws on the balance cock/bridge, is a little odd 03-Jul-20 10:50 AM Not a terribly pretty movement. I can’t tell if those are even jewels or metal bushings, they’re so filthy. No obvious markings. 03-Jul-20 10:50 AM I’m also concerned because I have no access to the mainspring click from the back, so I’m not sure how to let down the mainspring safely. I suppose I have to get it out of its case first? 03-Jul-20 10:50 AM I also don’t like the idea of having to line up four wheels at once, given the back is all one plate, not separate bridges.... 03-Jul-20 10:54 AM Yes, unscrew the setting lever for the stem slightly, and remove it from the case, remove the hands, dial, then you may have access 03-Jul-20 10:54 AM If I had to guess, I’d say this is East German utilitarianism. 03-Jul-20 10:54 AM or, it may be one of the smaller screws by the stem 03-Jul-20 10:54 AM sometimes, as in a vintage longines I have, you can rotate a screw that is connected to the click 03-Jul-20 10:54 AM It’s also filthy inside. I saw a visible hair in the hairspring. 03-Jul-20 10:55 AM heh, standard pocket watches 03-Jul-20 10:56 AM The parts move freely, but irregularly. I’m not sure if it just needs a cleaning, or if there are jewel / pivot problems. 03-Jul-20 10:56 AM only one way to find out.. take it apart 03-Jul-20 10:56 AM or have someone else do it, but yeah 03-Jul-20 10:56 AM those bridge screws appear to be round, not flat polished, so be sure to use a hollow ground screwdriver blade 03-Jul-20 10:56 AM otherwise you'll make a divot/apprentice mark at the top of te round, really annoying to see 03-Jul-20 10:57 AM Also before I do any further disassembly, I’m going to need to contain potential contamination from the dial and those hands. 03-Jul-20 10:58 AM ohhhh, glow in the dark? 03-Jul-20 10:58 AM certainly looks glowy w/ the cathedral hands 03-Jul-20 10:59 AM Appears to be on the hour markers on the dial and the hands. 03-Jul-20 11:00 AM yeah, be careful - don't lick it 03-Jul-20 11:00 AM Hence why I said it was a check source. 03-Jul-20 11:00 AM oh, that's what you mean, okay 03-Jul-20 11:00 AM sorry, still somewhat early after a solid week 03-Jul-20 11:00 AM and I've been attempting to do some maths 03-Jul-20 11:00 AM w/re to Poisson's Ratio 03-Jul-20 11:01 AM Heh. I just finished limits with indeterminate forms and L’Hopital’s Rule. 03-Jul-20 11:01 AM This at the end of a chapter on inverse trig functions, exponents, logarithms, hyperbolic functions and their derivatives. Got another chapter on applications of derivatives, then it’s off to the races with integrals. 03-Jul-20 11:01 AM I’ve learned this in high school and then again in college. But that’s almost a quarter century ago.... 03-Jul-20 11:01 AM So it’s coming back to me. 03-Jul-20 11:06 AM yeah, it's been ~15 years since I did any real calc.. I'm a little rusty, but getting back into it 03-Jul-20 11:06 AM there's some neat things I want to build and I need to get it right 03-Jul-20 11:06 AM need to make proof of concepts first, then actual application 03-Jul-20 11:06 AM while at the same time school & renovating the house 03-Jul-20 11:06 AM and dog walks 03-Jul-20 11:06 AM not enough hours in the day 03-Jul-20 11:06 AM today is a rest day, anyways 03-Jul-20 11:22 AM Also, does synthetic watch oil in new sealed containers go bad? 03-Jul-20 11:22 AM And... my dream watch: 03-Jul-20 11:22 AM https://www.ablogtowatch.com/interview-richard-hoptroff/ 03-Jul-20 12:35 PM they have a certain shelf life, I forget what most are rated at... but if you keep it sealed and refrigerated it would be a bit longer lasting 03-Jul-20 03:56 PM So, my watch destruction skill have nothing to do with overwinding. I've only managed to do that with a pocket watch of questionable manufacture. Prior to age 24, when I entered the land of All The Lasers, Radiation & Chemicals and all worn reflective surfaces needed to come off of my body, I was a regular watch wearer. I also tended to destroy them through misadventure at the rate of ~1/quarter. I have had two nails stopped by watches on separate instances. I've lost a watch off my wrist into a heavy press. I've shattered one falling off a cliff. When I heard the Chinese folk custom of mothers putting a jade bracelet on their child as "Luck Armor" so that the bracelet breaks off rather than the child being injured in an accident, I decided that's how Timexes were working for me. 05-Jul-20 08:48 AM where are the rants? 05-Jul-20 12:10 PM https://www.youtube.com/watch?v=nWgqdfAomVI&feature=share recent example... and his friend.... 05-Jul-20 12:10 PM https://www.youtube.com/watch?v=z7CPqROtanA&feature=share 05-Jul-20 12:10 PM Here are two recent stories. They work together so the post together. I will see if I can track down some of the other recent ones. 05-Jul-20 12:10 PM If you just search for Chinese government harassing journalists and you tubers you will find tons of circumstantial evidence, and generally where the is smoke there probably is fire, all be it closely guarded in state secrecy fire. 06-Jul-20 03:49 PM For anyone interested or curious, the COVID19 diagnostic device I developed at my job has passed the first gate of an accelerated diagnostics development program by the NIH. It's turning into the highlight of my engineering career thus far. Kind of crazy that as the sole hardware designer (mechanical, optical, electronics, firmware), I made a device that is now being considered by the NIH for emergency use to address a global pandemic! 06-Jul-20 04:05 PM I guess it's really just addressing a US pandemic. The rest of the world is getting it under control, but in the US we have special kinds of idiots that require special solutions to the pandemic. 06-Jul-20 05:46 PM Exciting stuff! Unfortunate circumstances but essential none the less 06-Jul-20 05:53 PM it's all going to come back in a 2nd wave this winter anyways, all over 06-Jul-20 05:54 PM In the US we just get one giant wave that never ends. 06-Jul-20 05:55 PM time will tell.. 06-Jul-20 05:55 PM I mean, this is my second week back in school [on campus] 06-Jul-20 05:55 PM but it's also a bench/lab program, so it falls into a special category 06-Jul-20 05:55 PM not just academia 06-Jul-20 05:55 PM going to silicone some replacement glass tops for the frog tanks that fell on me a week ago, bbl 06-Jul-20 07:02 PM I've been back three weeks now 06-Jul-20 07:09 PM I've been back for 3 weeks and almost immediately got it because I'm super lucky like that 06-Jul-20 07:28 PM One in forty either have it or have had it in my city so it’s officially all over here now. As ubiquitous as the regular flu at this point and that’s only people who have been Confirmed as having it. They think many others have had it and didn’t even know. 06-Jul-20 07:47 PM Yeah, mines not confirmed because apparently running a PCR test is really, really hard, but it is it. Nothing else fits my symptoms outside of the flu, and it's July 06-Jul-20 07:57 PM And zpack didn't work. Forgot about that. 06-Jul-20 08:07 PM some of the other groups have already given up on wearing masks and stuff though 06-Jul-20 08:20 PM ICE is going to deport students on student visas if they go to an online only (or mostly online in practice) school too. So much for hoping that all this in person stuff was just a game of chicken I guess :/ 06-Jul-20 10:44 PM Wonder how that works for grad students 06-Jul-20 10:44 PM Our grad classes are online only but we still do research 07-Jul-20 09:47 AM This is a great question that set UC Berkeley to full tableflip yesterday. 07-Jul-20 09:56 AM Kinda glad that I didn't choose to go to grad school this year... There would've been a high likelihood of being deported/refused a new student visa even after admission I think. 07-Jul-20 09:56 AM Judging by the recent developments in Hong Kong, going back home is not really an option anymore 07-Jul-20 09:56 AM Not for the long term anyway 07-Jul-20 09:56 AM One of my old classmates was just arrested on 1st of July, luckily not on charges related to the Chinese national security law 07-Jul-20 10:41 AM Yeah from what I read the order isn't at all clear what the hell it even means for grad students 07-Jul-20 12:20 PM @idmb on the subject of liquid cooling.... 07-Jul-20 12:20 PM I saw this yesterday. 07-Jul-20 12:20 PM https://youtu.be/IYTJfLyo_vE 07-Jul-20 12:20 PM This is just... no.... 07-Jul-20 12:22 PM the reservoir really does it 07-Jul-20 12:22 PM my "water" is really glycol 07-Jul-20 12:22 PM And playing S.T.A.L.K.E.R.... 07-Jul-20 12:23 PM boris is 11/10 07-Jul-20 12:23 PM one of the best sh!tposter youtubers 07-Jul-20 12:25 PM A nu cheeki breeki i v damki! Get out of here, Stalker! 07-Jul-20 12:25 PM I have been missing Ukraine. 07-Jul-20 12:25 PM Boris had an episode on making Kompot. I miss having kompot by default with each meal. 07-Jul-20 12:25 PM And I started to develop a taste for kvass. 07-Jul-20 12:31 PM my grandma makes kompot regularly, and you can actually get kwass here in the stores 07-Jul-20 12:31 PM so I'm all set 07-Jul-20 12:32 PM I’ve made kompot before. 07-Jul-20 12:32 PM it's really not that hard 07-Jul-20 12:32 PM I've cooked most of boris recipes and man, they were all amazing 07-Jul-20 12:36 PM I’m debating acquiring takeout from the local Ukrainian restaurant that appears to be open now, at least for takeout / delivery. 07-Jul-20 12:36 PM Although their flavored vodka flights probably can’t be packaged for transport. 07-Jul-20 12:37 PM just get a whole bottle! 07-Jul-20 12:37 PM also flavored vodka? Never heard of that 07-Jul-20 12:37 PM They made their own vodka infusions. 07-Jul-20 12:40 PM ohhh neat 07-Jul-20 12:40 PM we've done that with garlic on our latest hacker meetup 07-Jul-20 12:40 PM 10 cloves of garlic to 0.7 L vodka, let it soak over night 07-Jul-20 12:41 PM Horseradish. 07-Jul-20 12:41 PM hits you like a truck but then you start to enjoy it 07-Jul-20 12:41 PM Honey and pepper. 07-Jul-20 12:41 PM Sour cherry. 07-Jul-20 12:42 PM ohh that honey one actually sounds really nice 07-Jul-20 01:03 PM habanero vodka / tequila is neat 07-Jul-20 01:03 PM just don't mix with anything fizzy. 07-Jul-20 01:03 PM I tried vodka ice once 07-Jul-20 01:03 PM after I had a bit of vodka before 07-Jul-20 01:03 PM literally just a popsicle form filled with vodka in dry ice 07-Jul-20 01:03 PM .... it was not a good idea 07-Jul-20 01:06 PM Same here, we tried that with rum 07-Jul-20 01:07 PM honestly, I'm glad to hear I'm not the only one who's that stupid 07-Jul-20 01:08 PM I bet that everyone tries it when given access to cryogenic temperatures 07-Jul-20 01:08 PM fair 07-Jul-20 01:08 PM sadly the store here closed down 07-Jul-20 01:08 PM and I don't trust my two ln2 dewars 07-Jul-20 01:08 PM one came from a clinic and still had sperm sample containers in it when I got it, the other one has an unknown history but spent its life in a detector lab, cooling a huge Ge(Li) 07-Jul-20 01:08 PM don't really want food to come into contact with either 07-Jul-20 01:18 PM sorry what 07-Jul-20 01:18 PM oh I missed the word "containers" 07-Jul-20 02:25 PM Isn't compote just cooked fruit? 07-Jul-20 02:25 PM basically yes 07-Jul-20 02:25 PM https://www.youtube.com/watch?v=9bZk6wXCMCY 07-Jul-20 02:25 PM my grandma always makes it with pears and apples 07-Jul-20 02:25 PM bit of cinnamon 07-Jul-20 02:28 PM Seems like a ton of sugar 07-Jul-20 02:28 PM lol do you know slav food 07-Jul-20 02:28 PM I don't think I've ever used sugar in compote 07-Jul-20 02:28 PM it's pure fat and sugar 07-Jul-20 02:28 PM I know polish food 07-Jul-20 02:28 PM Make haluski a lot 07-Jul-20 02:28 PM And galumpki 07-Jul-20 02:28 PM (well, one pot version, unrolled) 07-Jul-20 02:30 PM omnomnom 07-Jul-20 02:30 PM my grandparents came from croatia, and man they know how to cook 07-Jul-20 02:31 PM I grew up with a lot of polish and Slovak and Italian food around 07-Jul-20 02:32 PM very nice 07-Jul-20 03:46 PM My dewar came from a... cattle breeding operation. 07-Jul-20 03:46 PM So... yeah.... 07-Jul-20 03:46 PM I gave it a rinse with a 10% bleach solution to disinfect it, which is typical for food service. 07-Jul-20 03:46 PM I figured between that and the LN2, nothing that could make me sick could survive it, and have not had qualms about using LN2 inside edible concoctions. 07-Jul-20 03:46 PM My favorite: LN2 plus Bailey’s Irish Cream = 34 proof ice cream of bliss 07-Jul-20 03:46 PM A lab dewar, well, I’d find that more questionable. 08-Jul-20 01:32 PM Well shoot. Looks like some frat parties before the 4th as lead to some community COVID spread in the minuscule student body on campus during the summer. So, in a different way than normal, the frats are a hazard to life and limb to the rest of campus. 08-Jul-20 01:38 PM grumble grumble 08-Jul-20 01:38 PM the "I Don't Know How To Explain To You That You Should Care About Other People' article remains 110% relevant 08-Jul-20 06:22 PM why would you ever try to convincesomeone that doesnt - to ? it seems like energy better spent elsewhere 08-Jul-20 06:22 PM this includes writing an article/blog about it 08-Jul-20 06:22 PM (elsewhere from that) 08-Jul-20 06:22 PM most of everybody that I've talked to that's been on that side wont change their mind 08-Jul-20 06:22 PM and the fact the title starts with "I dont know how to explain ..." probably means you should find an article that does know how 08-Jul-20 06:22 PM unless I am missing the point here 08-Jul-20 06:22 PM beyond content creation 08-Jul-20 07:44 PM It's crazy. My dad was complaining on the phone to me the other day that the protests are getting on his nerves, and one particular instance was about some non native-American woman starting a petition to get a par renamed from squaw park to something less offensive. And that there weren't even any native Americans living in that town, or having signed the petition, hasn't heard of any native reservations in his or nearby states (except new york). And then I had to use the analogy of "if north korea had a park names park, wouldn't he be pissed even though no Irish Americans lived in that neighborhood of north Korea? And he was just silent. I gave a few others too, using friends of his that are people of color... And again he was pretty much just silent. 08-Jul-20 07:44 PM Also, just a few weeks ago when police reform was first making progress in the legal sector, he was saying how all this wouldn't have been possible without this virus putting people out of work, and sounding positive about the reform of bad or lack of laws. 08-Jul-20 07:44 PM So I don't really understand how someone can just seem so, I don't even know if hypocritical is the right word 08-Jul-20 07:44 PM But "like that" anyway 08-Jul-20 07:44 PM I almost think it comes down to just a generic characteristic of being rude quickly when a disagreeable moment occurs, and then being so embarrassed after they come around internally that the negative experience doesn't seem to stick as a learning experience (strongly anyway). 08-Jul-20 08:04 PM @Noxz the article is mostly irrelevant beyond the quippy title, but like.. it's a thing worth doing/trying, because a lot of the time, these people are family or friends or coworkers or people we're obligated to be around in some way that we can't just shut out 08-Jul-20 08:04 PM the US media is so totally immersed in the fine craft of stoking partisan conflict that you don't have to go very far at all to find someone who's had their whole worldview collapsed into soundbites. there are absolutely circumstances where just having a conversation with someone on the 'demonized side' can literally pull the rug out from someone and make them realize what flimsy premises they'd been galvanized against.. but, then, there's also a lot of people who won't change their mind for anything; you are right on that front 08-Jul-20 08:04 PM ppl will straight up form what they think to be totally coherent and comprehensive pictures of entire demographics solely from what they hear on the news or the radio without so much as ever speaking to a person of said demographic and it's incredibly depressing 08-Jul-20 08:21 PM so, idk, i'd rather potentially-ineffective articles exist that desperately try to spell out why and how certain issues are important, than to not have them at all & sit by the wayside while swathes of people (continue to) get annihilated by bigotry and greed 08-Jul-20 08:21 PM like, as a trivial example, when i sat down & rly started to process/start my whole gender transition thing, i had to reconcile with the fact that accepting this would make me literally persona non grata in a bunch of places all over the world & even within my own country. i didn't realize that my ability to use public bathrooms would become a highly publicized long-standing political wedge issue (not that that would have changed anything) that continues (& is in many ways intensifying) to this day 08-Jul-20 09:06 PM make a pride diffraction grating emote 08-Jul-20 09:21 PM Honestly though 08-Jul-20 09:21 PM Would be cool 09-Jul-20 06:52 PM I acquired carry out Ukrainian. Mmmm..... Varenyky, stuffed cabbage, cold borscht, kompot, and black cherry infused vodka. 09-Jul-20 06:52 PM At least I hope it’s a Ukrainian vodka. 09-Jul-20 06:52 PM Which means uranium shot glasses. 09-Jul-20 07:55 PM To go alcohol is the best part of the pandemic 09-Jul-20 07:55 PM Easily 09-Jul-20 07:55 PM Though I haven't really been able to utilize it 09-Jul-20 08:56 PM I have had perhaps 3 or 4 alcoholic drinks total during covid. I figure with the loss of many outdoor activities I should not be doing any extraneously unhealthy things. 09-Jul-20 10:35 PM I’m getting 10x as much exercise haha 09-Jul-20 10:35 PM But also public park responsible drinking is excellent now 09-Jul-20 10:35 PM Local breweries delivery too 12-Jul-20 06:08 PM @rdpierce have you heard of technopipes? Very cool / portable practice tool 12-Jul-20 06:08 PM Midi bagpipes 12-Jul-20 06:14 PM Does that really work? I've never played a midi anything that remotely got resistance right 12-Jul-20 06:14 PM Besides keyboards I guess 12-Jul-20 06:49 PM I own a set of Daeger pipes. 12-Jul-20 06:49 PM They are comparable. MIDI practice pipes. 12-Jul-20 06:49 PM I also have built a musical Tesla coil. I think it would be awesome to couple the MIDI output of the chanter to the I out of the Tesla coil. 12-Jul-20 06:49 PM Redpipes are seriously awesome. These are an electronic chanter, a bag, fake drones, a real blow stick, a calibrated air leak in the bag, and a pressure transducer. 12-Jul-20 06:49 PM It took me a while to realize she was playing them: 12-Jul-20 06:49 PM https://youtu.be/Cdhe_6KfHBI 12-Jul-20 06:58 PM I also have built a musical Tesla coil. I think it would be awesome to couple the MIDI output of the chanter to the I out of the Tesla coil. ok that's amazing in some terribly terribly nerdy way 12-Jul-20 06:58 PM I’m like... wait... there are chromatic notes that a bagpipe can’t play... then, oh wait, it’s a synth with extended fingering. 12-Jul-20 06:58 PM I’d probably need to rewrite the Tesla coil firmware to do that. It’s not simple. 12-Jul-20 06:58 PM The pipes don’t use normal chromatic temperament. They use pitch bending. 12-Jul-20 06:58 PM I don’t think my coil supports that. 12-Jul-20 06:58 PM Also, the drones are on different channels. My Tesla coil listens to a single channel. And it only supports two notes at once, which won’t support both the chanter and drones. 12-Jul-20 07:49 PM Well the technopipes have no bag control, so there's no resistance/velocities it's binary. 12-Jul-20 07:49 PM redpipes are actually amazing. saw a pair at that factory! 12-Jul-20 07:56 PM Well, that's kind of what I mean. I don't play bag pipes at all so I don't know how it specifically works, but I've messed around with quite a few EWIs, and while they're okay for what they are, they're very awkward to do any sort of expression with because there's absolutely no feedback. 12-Jul-20 07:56 PM At least from a saxophone player perspective where I'm used to the reed really fighting against you as you start blasting 12-Jul-20 08:24 PM It isn’t exactly binary. The pressure determines whether the drones sound, or the the drones + chanter. 12-Jul-20 08:25 PM Which pressure? 12-Jul-20 08:25 PM I meant on the technopipes 12-Jul-20 08:25 PM Bag pressure. 12-Jul-20 08:25 PM On a real bagpipe, you need a certain pressure to sound the drones, then a greater pressure to sound the chanter. 12-Jul-20 08:26 PM Yeah 12-Jul-20 08:26 PM Apparently the redpipes let you “overblow” the chanter to shift it to a higher register that you can’t do with real bagpipes. 14-Jul-20 08:09 AM Btw, very very off topic, I'm making my own action camera! 14-Jul-20 08:09 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/Helmet_Cam_Project_024-5588D.jpg 14-Jul-20 08:09 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/Helmet_Cam_Project_023-EBB0A.jpg 14-Jul-20 08:09 AM True 1080p / 60fps 14-Jul-20 08:09 AM it's designed to hug the helmet so it's more streamlined than a Gopro. 14-Jul-20 08:09 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20200709_150059-87149.jpg 14-Jul-20 08:09 AM Here, compared with a cheap F9 camera. 14-Jul-20 08:09 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/Helmet_Cam_Project_014-3CF6D.jpg 14-Jul-20 08:09 AM Should be good at least to IP65, but I will test to IP68 14-Jul-20 08:09 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20200709_150127-36D1F.jpg 14-Jul-20 09:30 AM That's pretty cool 14-Jul-20 10:20 AM Thanks ^^ 14-Jul-20 10:20 AM hasn't had much succes/acceptance in my motorbike circles, tho. 14-Jul-20 10:53 AM what a bummer, that's a super cool design 14-Jul-20 10:53 AM looks really lightweight and aerodynamic too 14-Jul-20 11:32 AM @Nixie you mean your camera hasn't had much success? 14-Jul-20 11:53 AM Yeah those guys are more interested in brand then designs and functionality 14-Jul-20 11:53 AM Looks awesome though. Like ant man meets Aliens 14-Jul-20 12:02 PM @nmz787 they gave no opinions, negative or otherwise, like...feedback, thoughts...just, mostly silence. ¯\_(ツ)_/¯ 14-Jul-20 12:03 PM build one for the other side, add a laser 14-Jul-20 12:03 PM Sizewise is 1mm smaller per side than a Gopro Session. 14-Jul-20 12:03 PM but that look very cool 14-Jul-20 12:04 PM hahaha, we talked about adding servos to the gimball and cosplaying mad eye moody from Harry Potter. 14-Jul-20 12:04 PM The look is squareish, probably because I like straight lines and brutalism... 14-Jul-20 12:04 PM @Addison-110m it's tempting to add a second one, just because, altough it will make the helmet look like a stormtrooper one. XD 14-Jul-20 12:04 PM Hopefully in a month I'll have a ready to go version (that one is PLA, would not stand weather of any kind) I got someone in germany printing the body pieces in a resin SLA printer, a pcb from oshpark and components coming from china, they should arrive more or less at the same time. 14-Jul-20 12:04 PM Glad to hear people like it, I appreciate it a lot. (any negative opinions are totally welcome too, btw) 14-Jul-20 12:20 PM @Nixie In my experience, the automotive folks seem to care mostly about products they can buy, there are "hackers" but they're much less prevalent and most often limited to body work or welding 14-Jul-20 12:20 PM I posted some debug on my truck's reverse backup camera, tearing apart the whole radio and photographing all the circuit boards and chip names, schematic tracing from the manufacturer wiring diagrams.. finally figuring out that my fix was removing a single wire from the back of the radio and then the brightness control worked perfectly when in reverse 14-Jul-20 12:20 PM But the response was mostly crickets and rejection, responses like"my dealer updates my software and the screen is much less bright now" even though my issue was not only brightness, but lack of dimmer functionality during reverse 14-Jul-20 12:20 PM So basically, yeah, common motorheads like carburetors not fuel injection, and thus nothing to do with circut building 14-Jul-20 12:32 PM damn 14-Jul-20 12:32 PM I learned the lesson tho. 14-Jul-20 12:32 PM (and I have a helmet camera noone else has, that's a plus) 14-Jul-20 12:32 PM glad you repaired your camera, btw! 14-Jul-20 01:13 PM Depends on the builders. 14-Jul-20 01:13 PM Some I know run eprom emulators for on the fly ECU parameter tweaking and repair ECU's on the side. 14-Jul-20 03:31 PM That would be an interesting sight... 14-Jul-20 03:31 PM (the motor parameters being changed on the fly) 14-Jul-20 04:42 PM Old ECU's are fairly primitive, you can break out the RAM and EPROM 14-Jul-20 04:42 PM But most only do the EPROM with an EPROM emulator, that allows tuning the engine parameters while running. 14-Jul-20 05:51 PM I had the fortune of working with MoTeC's M150 series racing ECUs with a development licence, and they are super powerful. You can program basically anything from traction control, boost control, electronic throttle, custom CAN bus communication protocols in addition to fully custom fuel and ignition maps 14-Jul-20 05:51 PM Of course they are super robust and lightweight, I think our development ECU had 12 ignition coil drivers, 12 direct or port fuel injector drivers, like 20 analog IOs and 30 digital IOs, all programmable via their ECU development software, in a C# like language 14-Jul-20 05:51 PM $3000 for an ECU is a bit steep for what it is inside, but we got a big discount and it's mostly paying towards the reliability and future expansion possibilities 14-Jul-20 05:51 PM These development ECUs do allow you to change engine ignition and fuel maps on the fly, but the firmware of course needs to be flashed when nothing is running 14-Jul-20 05:51 PM This also makes tuning a lot easier. Tunable parameters can be defined in the code within a certain acceptable range, and then when the ECU is running, a tuning software can allow you to monitor performance while changing things 14-Jul-20 05:51 PM Communication is via ethernet, so you can plug the thing into a router, and voila, you've got wireless telemetry 15-Jul-20 12:06 AM Well enthusiasts aren't necessarily builders 15-Jul-20 12:06 AM I think most of the people on the truck Facebook groups I'm in (Chevy ZR2) aren't really builders, some don't even care about the truck's offroad capabilities, admitting they just think "it looks cool" 15-Jul-20 01:43 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/MVIMG_20180821_214208-EC0F6.jpg 15-Jul-20 01:43 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/MVIMG_20180821_214149-5F47E.jpg 15-Jul-20 01:43 AM I confused the Facebook groups with those 15-Jul-20 01:43 AM Bust really just plugged my old rasPi into the reverse camera ntsc video input cable 15-Jul-20 10:50 AM the new labview stuff just has the same design as Excel 15-Jul-20 10:50 AM blocky with a similar green 15-Jul-20 01:58 PM XD 15-Jul-20 05:39 PM I have the community edition installed, but win10 does not seem to support my NI USB-GPIB adapter :( 15-Jul-20 05:39 PM I just wanted to make some efficiency graphs of some amplifiers 15-Jul-20 08:52 PM which USB-GPIB adapter? 15-Jul-20 08:52 PM this one works fine for me: 15-Jul-20 08:52 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/NI-GPIB-USB-HS-National-Instrumens-Interfa-AFD93.png 15-Jul-20 08:52 PM you might just be missing the GPIB software? that's separate. 15-Jul-20 09:12 PM So, I stopped paying attention to how the "let's make the plans for fall less terrible" saga here was going, and wow, I didn't even know there were that many tenure track faculty... 15-Jul-20 09:12 PM 600+ signing the petition 16-Jul-20 12:54 AM Petition? 16-Jul-20 07:52 AM One of the many petition/open letters/complaints to the board of regents about their reopening plans 16-Jul-20 12:50 PM @idmb Yeah looks like that one 16-Jul-20 01:23 PM Does it not show up in NI MAX? 16-Jul-20 08:08 PM So, dude at school has this "Nailed It" novelty button on his desk.. and I just bought one and a little audio module (the chip had zero writing and a few bucks for a tiny module was more worth it than my time).. I ripped all of the original stuff, and will eventually re-reecord it to say "Failed It!" (in the various phrases) and maybe some more personal stuff that dude goofed up on, and swap the buttons on him! For now, the hardware hack itself has been completed and the thing is functional, just the audio is left~ 16-Jul-20 08:08 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/DSC_1698-2F8BB.jpg 16-Jul-20 08:08 PM will be a nice prank 17-Jul-20 02:43 AM Woohoo, I can go back to work! 17-Jul-20 02:43 AM starting on the 3rd 17-Jul-20 06:13 AM any sort of limitted capacity or similar? for instance, the watch service centers around here arent more than 50% capacity, some of them are doing shifts, etc 17-Jul-20 06:22 AM nope, completely back to normal 17-Jul-20 06:22 AM I don't work in service, but in a power plant 17-Jul-20 06:22 AM you can't really do part time there 17-Jul-20 06:23 AM nice, we have a whole process of regulations we 'must' follow.. msotly none of us dont not want to be in class, so we're doing our best 17-Jul-20 08:20 AM did I mention we have to have 1/3 regular room usage, which makes no sense since I have my own room normally? 17-Jul-20 08:29 AM Your legs can be in for 8 hours, then your torso for the next 8, and then finally arms and head can do might shift. What's the issue? 17-Jul-20 09:09 AM What kind of power plant? 17-Jul-20 09:09 AM Germany ceased all nuclear power, yes? (And it buys French nuclear power....) 17-Jul-20 09:14 AM yes 17-Jul-20 09:14 AM coal and waste burning 17-Jul-20 10:21 AM look at this labview from SRS lol 17-Jul-20 10:21 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/unknown-DF1F9.png 17-Jul-20 10:54 AM You can make some cool stuff with EPICS. I have been using CSS BOY which is an Eclipse based operator GUI. LabView integrates with EPICS. 17-Jul-20 11:17 AM 10,000x better than the labview that came with my hammatsu detector. Sequence structures around everything... 17-Jul-20 11:26 AM my PI started his lab using CVI Labwindows 17-Jul-20 11:26 AM and it was his father that convinced him to just use labview 18-Jul-20 01:23 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/unknown-82CE5.png 18-Jul-20 01:23 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/Ec2Ih9cUEAEeesv-AAE4B.png 18-Jul-20 01:23 AM what a fun world we live in 18-Jul-20 08:25 AM i can confirm i use allot of such surgical equipment, they are really handy 18-Jul-20 09:05 AM dont even get me started on tweezers 18-Jul-20 09:05 AM some specialty watchmaking stuff is upwards of $800 USD ea 18-Jul-20 09:05 AM the #9's and #10's are pricey 18-Jul-20 09:05 AM Dumont is the main brand for them 18-Jul-20 10:47 AM Don’t get me started on how much simple tweezers cost. 18-Jul-20 10:47 AM But they work so well at handling small screws. 18-Jul-20 10:47 AM As for the angular forceps, that reminds me of the time I was at a medical auction and they had a DaVinci surgical robot. 18-Jul-20 11:16 AM plastic locking forceps are really nice for cleaning optics 20-Jul-20 04:57 PM Same circuitboard from two different suppliers. They both assure me the copper on the outer layer is 38um thick. 20-Jul-20 04:57 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_2689-77F32.jpg 20-Jul-20 04:57 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_2690-E3D70.jpg 20-Jul-20 06:00 PM Are these specifically impedance controlled boards (meaning the stack up of the layer thicknesses have specified tolerances)? Would you mind sharing who are the suppliers? 20-Jul-20 06:19 PM There's also things like DC resistance for SMPS stuff that is affected by the copper thickness. 20-Jul-20 06:57 PM They're not impedence controlled. My design is sensitive to the copper thickness on the outer layer. Boards are from CircuitHub (top) and OSH Park (bottom). Both are 100% certain the outer layer is 1oz finished copper. 20-Jul-20 10:33 PM Did you do a section through the middle of a board just to make sure that you arent dealing with some weird edge inconsistency? 21-Jul-20 01:31 AM yay I finally got to see the flying space rock! 21-Jul-20 01:31 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/unknown-28C8B.png 23-Jul-20 07:30 AM Somewhat off-topic, does anyone here know of any content about someone making their own camera film? 23-Jul-20 07:31 AM I think nilered once did something like that? 23-Jul-20 07:31 AM He just did cyanotype stuff I thought 23-Jul-20 07:32 AM ah, that may be 23-Jul-20 07:34 AM briefly looking, doesn't seem quite what I'm after. I doubt anyone would make a roll of film, but 4x5 sheet film maybe 23-Jul-20 07:45 AM here ya go: https://www.photrio.com/forum/threads/film-coating-machine-homemade-on-flickr.34267/ 23-Jul-20 08:14 AM Oh god. What a brave soul 23-Jul-20 11:02 AM another chem lab flood today!!! guess who can't wait to find out if any seeped down to my basement!!! 23-Jul-20 11:46 AM Somewhat off-topic, does anyone here know of any content about someone making their own camera film? @idmb Emulsion making is totally doable at home as long as you have a darkroom (or any completely dark room). If you've got a 4x5 camera I'd probably recommend you get a 4x5 plate holder since glass plates are a lot easier to hand coat than film. 23-Jul-20 11:46 AM I can personally recommend The Light Farm (http://thelightfarm.com/) run by Denise Ross as a place for tried and tested formulas and Photrio's emulsion making section (https://www.photrio.com/forum/forums/silver-gelatin-based-emulsion-making-coating.93/) 23-Jul-20 11:46 AM The Light Farm also has a bunch of scanned books which lay out standard lab emulsions + coating techniques from the 40s which can be done at home 23-Jul-20 11:50 AM Neat! Thanks 23-Jul-20 11:52 AM No problem! I've messed with emulsion in the past and am currently working on replicating some Polaroid/instant photo technology so feel free to hmu if you have any questions 23-Jul-20 02:40 PM https://twitter.com/abubu_newnanka/status/1286163964762583041 24-Jul-20 03:25 AM demon core buns around a catte sandwich 24-Jul-20 03:22 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/unknown-24ABF.png 24-Jul-20 03:22 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/unknown-859F8.png 24-Jul-20 03:22 PM This is gona have some fun consequences for the laser idiots. 24-Jul-20 03:44 PM Featuring: me 24-Jul-20 03:44 PM Btw that TheFourth guy I'm pretty sure he's lying 24-Jul-20 03:48 PM Dunno 24-Jul-20 03:48 PM Some local-ish dude whos "technical" got tasked with finding a solution so he's using the resources he finds. 24-Jul-20 03:48 PM Ang googling laser goggles could bring up styros videos quite possible 24-Jul-20 03:48 PM +the "commies are not people and all protestors are commies"-thing does reek of the us-vs-them attitude around there. 24-Jul-20 03:50 PM Hooboy. 24-Jul-20 03:51 PM ngl tho i was kinda wrong about laser goggles 24-Jul-20 03:51 PM they are kinda stylish 24-Jul-20 03:51 PM depending on ur taste 24-Jul-20 03:55 PM I'm pretty fond of the work Lasershield and UVEX have done over the years. Much more comfortable, much better filters, and cheaper than when I started. And as far as issuing gear to cops, when I'm paid enough money as a consultant I'll be happy to tell them what to buy. 24-Jul-20 05:01 PM What about protective gear for all the protesters getting shot in the face with rubber bullets? 24-Jul-20 05:01 PM Oops, was that my outside voice? 24-Jul-20 07:26 PM That one's pretty straightforward and, very annoyingly, the wearing of which is being described as probable cause. 24-Jul-20 09:24 PM You'd be surprised at how powerful those rubber bullets are. Regular goggles that most people will be wearing to protect against tear gas...etc. will do basically nothing 24-Jul-20 09:24 PM One of my high school liberal studies teacher was shot directly in the right eye by a rubber bullet during a protest in Hong Kong last year. The situation was not violent, the armed police and protesters are 15m+ apart separated by barricades. The shot was fired without warning and was recorded on video. He was wearing a goggle like this: 24-Jul-20 09:24 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/unknown-817F6.png 24-Jul-20 09:24 PM It did basically nothing. He has maybe 5% visual acuity remaining in the right eye after many surgeries and more than a year of recovery, it looks like there is no chance of full recovery though, because his macula was punctured all the way 24-Jul-20 09:24 PM He was immediately charged with rioting, and is subsequently suing the government. The situation seems a bit hopeless though, considering recent political developement 24-Jul-20 09:30 PM yikes 24-Jul-20 09:31 PM yeah somehow all the "non-lethal" stuff got rebranded as "less lethal" and nobody noticed until now 24-Jul-20 09:31 PM It may very well be lethal if shot at someone else at a closer range, without any protective gear at all 24-Jul-20 09:34 PM That's why they call it less lethal. It's not designed to kill, but it definitely can. 24-Jul-20 09:43 PM There are no consequences for officers who actually fired, and no one knows who is the commander who ordered the shot. An ordinary citizen does not have the authority to demand the court to issue subpoenas for evidence in these cases, and less than 1% of complaints made to the "independent" agency supervising the police lead to any real action at all. I'd imagine the situation would be quite similar in the US, if you end up on the receiving end of something like this 24-Jul-20 09:53 PM Tear gas rounds that are fired by a shotgun-like weapon are even more deadly if aimed directly at somebody, the energy of the projectile is about the same (if not more) than a 9mm handgun round 24-Jul-20 09:54 PM The latest Chinese laws are quite problematic, as they claim USA style whole world jurisdiction for inciting against the state. 24-Jul-20 09:54 PM Yeah there ware multiple deaths in Iraq from that 24-Jul-20 09:57 PM For all I know, I might be on the list of the 60000 people who have breached that national security law 24-Jul-20 09:57 PM What they claim anyway 24-Jul-20 09:57 PM Almost anything can be done in the name of national security, little difference no matter where you are in the world 24-Jul-20 10:05 PM shrug it depends a lot. 24-Jul-20 10:06 PM Depends on what? The Chinese government is not known for giving people fair trials 24-Jul-20 10:06 PM Evidence and money doesn't matter in most of these cases 24-Jul-20 10:06 PM Only political influence might have some impact 24-Jul-20 10:06 PM I don't want to live like a refugee and constantly be afraid of something like this. There have been many cases where people can just be snatched at the border 24-Jul-20 10:08 PM "little difference no matter where you are in the world" thought this referred to other countries and other nationalities, not explicitly to the chinese law. 24-Jul-20 10:09 PM Well, I meant it makes little difference where I am in the world, as long as I am still a Hong Kong/Chinese citizen 24-Jul-20 10:09 PM True 24-Jul-20 10:09 PM Kainda like some russians who avoid russia between 18-28 years old to avoid the mandatory military service 24-Jul-20 10:09 PM Tho, we do have the same, but it's 6-11months and not as brutal as the russian one, which IIRC can be years. 24-Jul-20 10:43 PM Well this guy has brain damage, so it's starting to happen here too https://amp.reddit.com/r/2020PoliceBrutality/comments/hq4eza/portland_cops_shoot_peaceful_protester_holding_a/ 24-Jul-20 10:43 PM Last night https://twitter.com/melissaetehad/status/1286578797374926850?s=20 24-Jul-20 10:51 PM Didn't realize that video was from 12 days ago 24-Jul-20 11:49 PM The livestream(s) from tonight have been interesting https://youtu.be/yibkOh6DoLk 25-Jul-20 02:20 AM Oh wow, I had no idea this stuff has been livestreamed 25-Jul-20 02:20 AM I wish there was a way to select a single video from that matrix and make it full screen 25-Jul-20 09:14 AM You can usually track them down based on the info at the top of each little stream 25-Jul-20 09:14 AM Ive been watching off and on for a few nights and it really gave me a different perspective than I had on them before... 25-Jul-20 09:48 AM Here is the problem with all of this. I have been following many of these protest situations and the one thing in common with all of them is that ALL OF THEM involve groups and individuals that have been given ample warning to leave followed by threats of arrest with again plenty of warning to leave. The people in these cases are without a doubt breaking a law and disobeying a police order which by the way is a felony weather or not you are engaged in protest. Somehow people have equated the right to protest with a license to disobey law enforcement. There IS a place for violent protest in society but NONE OF THE THINGS going on lately rise to that level. This stuff requires the enacting of new laws and policies to conform to modern society. Not 20 year olds shouting at police. That does nothing constructive. Never had and never will. Additionally this defund police movement stuff is nonsense. They play a vital role in society. How about you change the policing policies and remove qualifiable immunity. That alone will reduce these instances of police brutalities. And for god sakes do not allow anybody with PTSD or even the most remote indication of anti social behavior of any sort to be a law enforcement officer. I am sorry but this rules out most veterans. Officers should be professionals with great executive skills and life training who should be able to make serious life altering decisions without need to revert hung to training of pulling your gun and firing three shots center of mass as a response to everything. Forget the line no time for back up. With radios, cameras everywhere, helicopters and police vehicles everywhere unless the person is directly threatening somebody you have all the time in the world for backup! Why are you getting into a wrestling fist fight with somebody?!?!? Just follow them until you have enough people of the proper equipment to properly arrest them. Ok. I will get off my old man soap box now. 25-Jul-20 09:51 AM nice essay 25-Jul-20 09:51 AM lol 25-Jul-20 09:54 AM The stuff in Portland seems to have very little to do with any actual goals at this point. More about attacking a federal building with explosives (commercial fireworks) and committing arson than anything else for the last week or so from the streams I have been seeing. They even attacked the mayor of Portland the other night when he was trying to listen to what the mob wanted and started throwing things at him as they tried to get back to city hall. Everyone knows the way to achieve your goals is to attack the politicians who come and try to support you/listen to you. 25-Jul-20 09:54 AM Last night someone got stabbed by someone else in the mob and they spent an hour or more assaulting that (sorta crazy) street preacher 25-Jul-20 09:56 AM The mayor wasn’t listening, it was a photo op. If he was listening maybe the Portland police wouldn’t have used chemical weapons for the two months 25-Jul-20 09:57 AM I watched the stream of the mayor in the crowd, he spent a couple hours actually talking to people and gave out his email address to a number of people with promises to follow up as the crowd chanted obscenities at him 25-Jul-20 09:57 AM Seemed like more than a photo op from what I saw 25-Jul-20 09:58 AM Maybe, but I’ll wait for the PPB to actually calm down, because it’s not just the federal police there 25-Jul-20 09:59 AM I do not see a way for things to deescalate at all while people are throwing explosives at a federal building :/ 25-Jul-20 10:17 AM There is a place for disobeying police orders and intentionally breaking laws, that is civil disobedience and is often the most effective way to get to actual change (enacting new laws and policies). The problem is very few protests have central organization with everyone being disciplined to follow certain guidelines (unlike the police). So then you see these things when people throw explosives, then the media and people will likely judge the entire protest/movement by the actions of a few. The Umbrella Movement back in 2014 in Hong Kong was extremely peaceful and civil because there was central organization, and because Hong Kong people understood from years of protesting that civil disobedience was the only way. This lasted for 77 days. The moment that changed it was when the government refused to give any political concession whatsoever, and instead ordered police to just fire tear gas rounds into a dense crowd in mass. In the US, the civil rights movement seems like a distant memory now. There is no such consensus that peaceful protest is the ONLY way, so it is even easier for politicians and people alike to justify the use of force by the police, when their actual intention is to keep the status quo 25-Jul-20 10:24 AM I think you misunderstood what a lot of “defund the police” advocates want. Even many “abolish the police” advocates aren’t advocating no police, they’re saying start from scratch. 25-Jul-20 10:24 AM I should also add that in the US, protesting is not the only way to get to changes in policies and laws. There is a democratic election system here, despite its flaws (in my opinion). Such a thing cannot be said for Hong Kong, unfortunately. 25-Jul-20 10:25 AM Lobbying is probably the most effective way to effect change on policy/law matters in the USA 25-Jul-20 10:26 AM Lobbying by regular citizens vs lobbying by vast corporations are on different levels 25-Jul-20 10:27 AM Nothing really holding back regular people from engaging on the same levels given the ability to crowdfund things now imo 25-Jul-20 10:28 AM IDK, Louis Rossman is struggling with that with right-to-repair. 25-Jul-20 10:28 AM Crowdfunding is great when many people care 25-Jul-20 10:28 AM I disagree... Money is not the only game in town and corporate Super PACs will have regular crowdfunded campaigns started and run by citizens beat no matter what 25-Jul-20 10:30 AM But a lot of the time more people are affected than care. How do you think the numbers of people who talk about planned obsolescence compare to people doing anything about it? There are crowdfunded campaigns but with minimal participation 25-Jul-20 10:31 AM And look at the result of one well-supported citizen with tons of online influence trying to give testimonies to all of these right to repair hearings at state legislatures 25-Jul-20 10:31 AM Nothing 25-Jul-20 10:31 AM Nothing changed 25-Jul-20 10:31 AM 100% failure rate, and this is at the state level, for an issue that should be common sense and much less divisive than stuff like police violence 25-Jul-20 10:33 AM They really need to be finding ways to meet with the lawmakers in private instead of just giving testimonies imo. That is how corporate lobbying works afaik where they set up meetings do discuss what their PAC/organization wants 25-Jul-20 10:33 AM That is what all the groups they are fighting have been doing 25-Jul-20 10:33 AM He did meet many lawmakers in private 25-Jul-20 10:33 AM Ah I only remember him meeting with one that was extra sympathetic 25-Jul-20 10:33 AM I wouldn't be surprised if all crowdfunding campaigns added up together came to less than Bloomberg's failed presidential campaign. 25-Jul-20 10:34 AM And he talked to all of them when he was testifying. Now why do you think most lawmakers would be less inclined to talk to one ordinary guy who seems to care and know a lot more than the corporate lobbists? 25-Jul-20 10:34 AM Did he take them to lunch or have it catered? That seems to be an important part heh 25-Jul-20 10:35 AM I'm not as cynical as you, I think there's a large amount of apathy and normalcy bias at play 25-Jul-20 10:35 AM Definitely agree on that 25-Jul-20 10:36 AM That's exactly what I'm referring to 25-Jul-20 10:36 AM The motivation to keep the status quo 25-Jul-20 10:36 AM Corporate lobbying has always been the most influential political force in the past, so it's no surprise most elected politicians would automatically assume that's the most important thing to keep constant 25-Jul-20 10:38 AM The repair businesses need to start a PAC 25-Jul-20 10:38 AM Probably would help too if it was just Louis Rossman w/ a PAC name involving repair industry 25-Jul-20 10:38 AM Make the lawmakers think it is more than just citizens giving testimony and having meetings 25-Jul-20 10:40 AM What % of the US do you think watches at least one tech video on youtube per month? 25-Jul-20 10:40 AM 5%? 25-Jul-20 10:40 AM Single issue PACs are less influential than Super PACs for this reason 25-Jul-20 10:40 AM Super PACs are not afraid to run ads and send out leaflets on anything, and they have the resources to have that wide coverage 25-Jul-20 10:41 AM I just want 25-Jul-20 10:41 AM politicians that answer questions even if the answer is "I'm not sure, but I will write something up on our website to answer that" 25-Jul-20 10:41 AM I wonder where the whole AOC thing will go! 25-Jul-20 10:41 AM Like sure it would be great to believe what politicians are saying, but in many cases it's even hard to believe they believe what they're saying 25-Jul-20 10:48 AM @idmb probably way less than 5% if you are talking beyond user level tech videos but 5% might be reasonable for tech in general given how broad that is 25-Jul-20 10:48 AM Completely unrelated to the other discussion 25-Jul-20 10:48 AM Anyone have suggestions for keeping SMD components organized? 25-Jul-20 10:51 AM A binder? 25-Jul-20 10:51 AM Small prototyping quantities 25-Jul-20 10:51 AM Considered that but was hoping for more ideas 25-Jul-20 10:56 AM I think that's the easiest and cheapest way for large variety and low quantity https://www.amazon.com/Organizer-Resistor-Capacitor-Assortment-Components/dp/B00V24ZX46 25-Jul-20 10:57 AM I was gonna buy one of those 25-Jul-20 10:57 AM The only resistor and the only cap books separately are better than the combined 25-Jul-20 11:14 AM @idmb sooo how's Canada feel in comparison? 25-Jul-20 11:14 AM I think I'd only really want to move to B.C. if I was going to emigrate 25-Jul-20 11:14 AM Feel about which part? 25-Jul-20 11:15 AM But that's purely based on the weather and geography 25-Jul-20 11:15 AM Politics 25-Jul-20 11:15 AM Where the country is (maybe) heading in comparison to the u.s. 25-Jul-20 11:16 AM I think it just feels like there's less of everything 25-Jul-20 11:17 AM Heh, that doesn't sound too encouraging 25-Jul-20 11:18 AM well the dominant vibes emanating from the US are ones where less is better 25-Jul-20 11:18 AM But with stuff like right to repair, it doesn't really matter what we do if the US doesn't do it too 25-Jul-20 11:18 AM We have all the same defund-the-police movements, particularly rethinking "wellness checks" done by the RCMP where recently someone was dragged down the hall by her hair while unconscious 25-Jul-20 11:24 AM What 25-Jul-20 11:24 AM That's messed up 25-Jul-20 11:24 AM Guess they check to make sure ur NOT well lol 25-Jul-20 11:29 AM I remembered seeing something very similar happen in Hong Kong, the girl under arrest was not unconscious, but was handcuffed and was not physically resisting arrest 25-Jul-20 11:29 AM https://www.youtube.com/watch?v=OrT9MsOaCBI 25-Jul-20 11:29 AM If those police were not armed in riot gear, this would not have happened 25-Jul-20 11:29 AM Never in the history of the city were there a case when force of this scale was used by cops in regular uniform to arrest someone 25-Jul-20 11:29 AM I don't think the overuse of force is simply due to an issue with screening of officers/a few bad apples. When police get into the mindset that they are armed to deal with violent protestors, it's easy to stop evaluating the actual situation 25-Jul-20 11:29 AM These cases are way too common... Police outnumber the people who they are trying to arrest, no one has any credible threat to endanger the safety of the officers, the cops know they are being filmed and this will be put on the internet, and it still happens 25-Jul-20 11:40 AM Make it an application process like for doctors or lawyers 25-Jul-20 11:40 AM Except less academically rigorous ofc 25-Jul-20 11:45 AM Again, I don't think the issue is mainly due to screening. Yes, policing should absolutely be treated as a profession with strict ethics and conducts, but to enforce this sense of professionalism, you need an appropriate system. Sending out cops in riot gear no matter the situation and make them immune to consequences is not the way to go 25-Jul-20 03:04 PM The single largest obstacle is the police unions. 25-Jul-20 03:04 PM Those need to go. 25-Jul-20 03:04 PM The people running them are scum. They promote a culture of silence. 25-Jul-20 03:04 PM They protect abusive cops. 25-Jul-20 03:04 PM Next, every time the city has to settle a lawsuit for use of force, wrongful death, take it out of the police officers’ retirement fund. 25-Jul-20 03:04 PM Once they start to reap the consequences of the actions of bad cops, the good cops will not be so quick to cover for the bad cops. 25-Jul-20 03:04 PM I agree, qualified immunity has to go too. 25-Jul-20 03:04 PM Also, a lot of the defund the police arguments have to do with reinvesting funds in communities to reduce crime. 25-Jul-20 03:04 PM If people feel they are trapped in a cycle of poverty, then crime, gangs, and drug addiction don’t look like bad alternatives, 25-Jul-20 03:04 PM The money it takes to hire police, investigate crimes, lock up offenders, try them, and incarcerate them is significant. Plus, once incarcerated, a person is unlikely to get a good job, so there’s a good chance they’ll return to crime. Wouldn’t it cost less to give someone the resources to get a skilled job that pays a good wage so they have a better alternative than crime? 25-Jul-20 03:59 PM https://youtu.be/DJiGuFCzaFo 26-Jul-20 10:19 AM correct 26-Jul-20 10:19 AM where are those 40' CC nuclear power plants they promised us 27-Jul-20 07:51 AM Yeah. Where is my neighborhood power plant. Also where is my flying car and jet pack while we’re at it? 27-Jul-20 09:02 AM Why not put the nuclear power plant in the car? 27-Jul-20 09:02 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/image0-9C0F0.jpg 27-Jul-20 09:02 AM Behold the Ford Nucleon! 27-Jul-20 12:34 PM yeahh 27-Jul-20 04:05 PM my university subreddit has basically full confidence january will be online only too 27-Jul-20 04:05 PM except the music students who are coming here for september 29-Jul-20 02:19 AM things you never want to see on your vacuum chamber 29-Jul-20 02:19 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/TWK_3487-2048x1363-E0ECF.png 29-Jul-20 05:14 AM nooo 29-Jul-20 05:14 AM whats happened? 29-Jul-20 05:17 AM it's a pic from the internet, of a bigger fusor 29-Jul-20 05:18 AM ah hm 29-Jul-20 05:20 AM http://www.nuclearphysicslab.com/npl/npl-home/plasma/fusors/fusor-i/ 29-Jul-20 06:34 AM I definitely agree this is something you never want to see... 29-Jul-20 06:34 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_3268-D3EC3.JPG 29-Jul-20 07:08 AM must have been a nice plopp 29-Jul-20 07:16 AM Have I mentioned here that a lot of ultracold / quantum degenerate gas research groups 29-Jul-20 07:16 AM have issues with their samples eating away their viewport seals 29-Jul-20 07:16 AM the Rubidium eats it up or something 29-Jul-20 07:16 AM every ~3-6 years a viewport will suddenly ruin their uhv 29-Jul-20 07:16 AM Which is kind of a big deal when you realize their tiny vacuum system is buried beneath like 12 layers of optics on a table 29-Jul-20 07:16 AM the group beside me had it happen once before they decided to breadboard everything and connect with fibers 29-Jul-20 07:16 AM so now it's only ~2 months downtime to fix 29-Jul-20 07:28 AM Anyone got decent suggestions for pumps for microfluidics? Looking for something that can have steady uL/min to mL/min flow rates? Syringe pump should be fine for now, but just wondering if people know good brands or models 29-Jul-20 07:28 AM @nmz787 ? 29-Jul-20 07:37 AM would a hplc pump be in that range? 29-Jul-20 07:41 AM Mm you know it looks like they are 29-Jul-20 07:41 AM Worried they may run a little on the high side tho, which Is why I was thinking just doing syringe pumps. I have to have 3 pumps for this setup, all different flow rates. 29-Jul-20 07:41 AM High side cost wise that is, they’re in the flow rate range I want 29-Jul-20 07:43 AM usually they can be run *really slow 29-Jul-20 07:47 AM @GigaSquirrel It was more like big "whuuuuush" - it was connected to fully pumped chamber of volume around 1 cubic meter. And it was broken by accident, when attaching hardxray detector to it. At least it wasn't me, who broke it 29-Jul-20 07:50 AM :D 29-Jul-20 02:00 PM @mike crb mostly I've focused on microfabbing pumps on-chip... But this showed up in my email earlier https://hackaday.com/2020/07/29/an-open-source-microfluidic-pump-for-your-science-needs/ 29-Jul-20 02:00 PM @mike crb when you say "steady" does that rule out peristaltic? 29-Jul-20 04:05 PM Yeah I think peristaltic may be a bit too many fluctuations but not sure 29-Jul-20 04:05 PM Using sheath flow to focus particles in my chamber so need to have the pumps all pretty consistent flow rates relative to each other 29-Jul-20 08:52 PM I was doing some more Chernobyl research and came across a Zone map on reddit. 29-Jul-20 08:52 PM https://www.reddit.com/r/MapPorn/comments/460ivs/a_highly_detailed_map_of_the_chernobyl_exclusion/?utm_source=share&utm_medium=ios_app&utm_name=iossmf 29-Jul-20 08:52 PM So there was one location I visited that I wanted to find on the map. 29-Jul-20 08:52 PM And I think I found it. 29-Jul-20 08:52 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/image0-F3191.png 29-Jul-20 08:52 PM It was low resolution and contained abbreviations, but I could make out пионер - Pioneer. 29-Jul-20 08:52 PM Which I figured might have been a camp for Young Pioneers, essentially the Soviet form of the Boy Scouts. 29-Jul-20 08:52 PM So I ask a native speaker to take a look. He fills in the abbreviations and translates: 29-Jul-20 08:52 PM Пионерский Лагерь (недействующий) - Pioneer Camp (inactive) 29-Jul-20 08:52 PM This is a total ROTFL moment. Inactive summer camp? Yeah.... right.... because that area just happens to be: 29-Jul-20 08:52 PM https://goo.gl/maps/WUf372JH1kPM8pKt9 30-Jul-20 05:05 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/20200730_CS2_Dimers_PC3_PC4-A95B1.png 30-Jul-20 05:05 PM @Mezmorizor look, droplets 30-Jul-20 05:05 PM (CS2 molecules bonding together in droplets - > CS2+ ions repelling eachother when ionized -> the extra blip around the yellow bit in the left image) 30-Jul-20 05:05 PM rest of the image -> the MCP is in quite bad shape 30-Jul-20 05:12 PM Interesting 30-Jul-20 05:27 PM (Velocity Map Imaging with my focusing mirror shifted slightly so the VMI is skewed, because the centre of my detector is terrible) 30-Jul-20 05:44 PM Thought you all might find this sorta interesting but I’m now the new owner of three old civil defense radios 30-Jul-20 05:44 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/image0-5AA3E.jpg 30-Jul-20 05:44 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/image1-E2C72.jpg 30-Jul-20 05:45 PM Funny looking Gonsets 30-Jul-20 05:45 PM I have some 160MHz Mobira VSS "Väestön Suojelu", I think? Radios 30-Jul-20 05:45 PM From old depots and shelters 30-Jul-20 05:45 PM Meant for communications between civil defense shelters. 30-Jul-20 05:45 PM Proper NIB, never used stuff from late seventies. 30-Jul-20 05:45 PM Still in box :D 30-Jul-20 05:58 PM https://www.cbc.ca/news/canada/british-columbia/bc-back-to-school-plan-1.5666749 school! 30-Jul-20 05:58 PM No university labs, but school! 30-Jul-20 09:06 PM Old Hams know those old school bus yellow radios. 2 meter AM rigs. Actually from what I understand the 2 meter band was popularized due to the availability of those specific radios. 31-Jul-20 08:06 AM Time to Nato ize the cheap Seiko 31-Jul-20 08:06 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_8470-32BD5.jpg 31-Jul-20 08:13 AM Much better 31-Jul-20 08:13 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_8471-1AAB2.jpg 01-Aug-20 08:53 AM Oh wow. 01-Aug-20 08:53 AM When I was a kid, I had an HF rig with tubes. 01-Aug-20 08:53 AM Worked 10 and 20m. 01-Aug-20 08:53 AM Fond memories of carefully dipping the needle while adjusting tune and load. 01-Aug-20 09:10 AM Oh neat! I think when all this is over I’ll have a new appreciation for rf power transistors 02-Aug-20 08:17 PM Why are demon core memes a thing... https://twitter.com/shellsist/status/1290030895487885313 02-Aug-20 08:51 PM YAY 03-Aug-20 12:32 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20200803_092421-80C19.jpg 03-Aug-20 12:32 AM ah it feels good to be back 03-Aug-20 11:06 AM Back in the USSR? 03-Aug-20 11:06 AM (sorry, Beatles reference) 03-Aug-20 11:16 AM Do they let you climb the stack? 03-Aug-20 11:16 AM I was reading a while back about the Czech Union of Chimney Climbers. 03-Aug-20 11:16 AM Apparently there’s some kind of actual recognition for their club. 03-Aug-20 11:17 AM I would not want to, bit of a fear of heights 03-Aug-20 11:20 AM I’ve seen some chimney climbing videos on YouTube that have a rather high pucker factor. 03-Aug-20 11:25 AM @rdpierce Always when I look at their database (http://koda.kominari.cz/?action=pregiomapy#50.036327,14.516826,12,pVTSikc,) I am amazed by its coverage and contents 04-Aug-20 10:29 AM Have you seen what happened in Beirut ? : https://www.facebook.com/mohamad.a.yehya1/posts/10158563803488188 04-Aug-20 10:29 AM What kind of nightmarish chemical could produce that kind of explosion that's terrifying 04-Aug-20 10:31 AM https://twitter.com/sewella/status/1290678063643140097?s=20 Not sure if the source is to be trusted, but imo the video material fits the description 04-Aug-20 10:31 AM many chemicals can unleash an explosion like that if you have enough of it 04-Aug-20 10:38 AM in favor of your source in the video there seem to be fireworks explosions in the initial blaze 04-Aug-20 10:55 AM My first thought was a fertilizer warehouse explosion triggered by the fire, interesting that is what they seem to be thinking too... 04-Aug-20 10:55 AM Why would you have something of that scale stored in a city though??? 04-Aug-20 12:17 PM It's almost 100% a nitrate explosion. That smoke color is so indicative 04-Aug-20 12:45 PM I also saw some armchair math that if the fireball expanded over 100m in one video frame it would be pushing the maximum flame front speed of pure grain dust explosions 04-Aug-20 12:46 PM twitter friend says a port authority claimed 50 tons of fertilizer stored nearby was involved 04-Aug-20 12:46 PM which'd make sense 04-Aug-20 12:48 PM friends guesstimated some numbers and got ~300 To tnt equivalent 04-Aug-20 12:48 PM https://www.emsc-csem.org/Earthquake/earthquake.php?id=882410#summary 04-Aug-20 02:29 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20200804_225731_628-DE451.jpg 04-Aug-20 02:29 PM This beer worries me 04-Aug-20 02:29 PM I hope it doesnt have cfcs 04-Aug-20 02:30 PM awesome 04-Aug-20 02:32 PM I think its frisian for friend or smth 04-Aug-20 02:32 PM Still. Not the first thing that i thought of when i saw "freon" 04-Aug-20 02:36 PM yeah I only knew freon 12, not freon 150 04-Aug-20 02:36 PM but that always leaves a weird aftertaste 04-Aug-20 09:36 PM Oh gosh, a friend sent me a real quantum physics groaner.... 04-Aug-20 09:36 PM Heisenberg and Schrödinger get pulled over for speeding. The cop asks Heisenberg, "Do you know how fast you were going?" Heisenberg replies, "No, but we know exactly where we are!" The officer looks at him confused and says, "You were going 108 miles per hour!" Heisenberg throws his arms up and cries, "Great! Now we're lost!" The officer walks back to the rear of the car and lifts the trunk. "Hey", says the cop, "Do you know you have a dead cat in here?" An angry Schrödinger replies, "Well we do now." 04-Aug-20 10:49 PM Hahahaha. 05-Aug-20 09:50 AM http://shiparrested.com/wp-content/uploads/2016/02/The-Arrest-News-11th-issue.pdf#page=3 05-Aug-20 09:50 AM Guess that has some info about where the 2750 tons of ammonium nitrate came from 05-Aug-20 09:50 AM Was wondering why the heck you would have tons and tons of nitrates in a city and that explains it...legal issues + lack of planning 05-Aug-20 09:57 AM Right next to major food storage too 05-Aug-20 09:57 AM Gona be really bad times there 06-Aug-20 12:58 AM https://cdn.knightlab.com/libs/juxtapose/latest/embed/index.html?uid=59321100-d740-11ea-bf88-a15b6c7adf9a 06-Aug-20 01:38 PM Internet and over enthusiastic kids was a mistake https://cdn.discordapp.com/attachments/452775413509259265/741011560708964372/Capture.PNG 06-Aug-20 01:38 PM https://cdn.discordapp.com/attachments/571392185224921088/741013206125903991/yummy.png 06-Aug-20 01:40 PM wow 06-Aug-20 01:40 PM just 06-Aug-20 01:40 PM wow 06-Aug-20 01:40 PM what server? 06-Aug-20 01:40 PM because yikes 06-Aug-20 01:40 PM rogers nuclear? 06-Aug-20 01:41 PM my bet is on styropyro 06-Aug-20 01:41 PM I'm not sure, but some characters over lap 06-Aug-20 01:41 PM yeah, I recognize one from ex&f too 06-Aug-20 01:42 PM the ex&f folks don't seem that insane 06-Aug-20 01:42 PM sure, some crazy ideas but they're safe about them? 06-Aug-20 01:42 PM I think that it's some other server, as I don't see #radiation on styros server. 06-Aug-20 01:42 PM no, they're tame enough and good about policing safety 06-Aug-20 01:42 PM just had to remind someone in another server, that if you're an American, taking sources from a smoke detector is not exactly legal 06-Aug-20 01:43 PM >.< 06-Aug-20 06:00 PM ...why. Why do you even feel the need to taste something you made? 06-Aug-20 06:00 PM Especially when you know it's a heavy metal whatever 06-Aug-20 06:35 PM Maybe he’s hoping to replicate the accidental discovery of aspartame’s use as a sweetener? 06-Aug-20 06:35 PM Or he’s a fan of Galen Winsor? 07-Aug-20 02:10 PM Safety third! https://youtu.be/Chyggkh2v_g 08-Aug-20 06:58 PM http://apollo13realtime.org/ 09-Aug-20 09:16 AM I have gotten asked MANY TIMES by attempting to be cool smartypants undergrads, usually physics majors, what uranium tastes like. Unlike the rest of my colleagues, I had an immediate answer "Heavy metals poisoning". And then the rad safety orientation took a 15 minute detour into industrial hygiene to teach student exactly how much they don't know about the periodic table and pharmacology. It's good to be a jack of all trades and master of several sometimes. 10-Aug-20 07:39 AM https://twitter.com/FriendlyWire/status/1292649019374628866 10-Aug-20 07:45 AM Need one for laser diodes (excluding dpss green and stuff like that) 10-Aug-20 07:45 AM Might not work actually 10-Aug-20 07:45 AM Lasers are different so doesn't work I think 10-Aug-20 07:45 AM Pretty cool for LEDs tho 10-Aug-20 01:41 PM HEY FRIENDS weird question but does anyone know of any exciting gotchas wrt: fumigating a lab space for termites? Kinda wondering if any of the used chemicals might have weird interactions/coating effects on like exposed vacuum hardware or delicate windows 10-Aug-20 01:41 PM My garage is, uh.. apparently pretty lively 10-Aug-20 01:46 PM I always found the concept of fumigating really weird 10-Aug-20 01:46 PM gives a bad taste in regards to my countries history 10-Aug-20 01:46 PM what is there that's toxic enough to get rid of everything but doesn't leave a residue 10-Aug-20 01:46 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/unknown-A9546.png 10-Aug-20 01:46 PM oh god 10-Aug-20 01:49 PM a local place seems to do fumigation-free limonene treatments and i am kinda hoping that that's doable here 10-Aug-20 01:49 PM Yikes that’s an unpleasant list 10-Aug-20 01:50 PM seriously how do you pump A HOUSE full of that stuff and get everything out again, out of the walls and cracks and... 10-Aug-20 01:50 PM Ummmmmmm, you don’t 10-Aug-20 01:50 PM ostensibly just a couple days of ventilation suffices 10-Aug-20 01:50 PM then I guess I misunderstood fumgation 10-Aug-20 01:51 PM I mean, you can try but I can’t imagine how either 10-Aug-20 01:51 PM i don't think fumigation is meant to leave any poisons embedded in the house 10-Aug-20 01:51 PM you'd hope so 10-Aug-20 01:51 PM Vaporized hydrogen peroxide is a dry gaseous method that has been used as a reliable alternative for aseptic processing isolators, and more recently, for room/facility decontamination. 10-Aug-20 01:51 PM Fumigation with formaldehyde vapor is the recognized and most commonly used method because it is a cost-effective procedure. 10-Aug-20 01:51 PM shudders 10-Aug-20 01:54 PM tricky too because this house is a duplex 10-Aug-20 01:54 PM guess i should go ask the neighbors if they've seen anything 10-Aug-20 02:11 PM I don't know much about it but my neighbors had their place fumigated and were back in after just a day of ventilation which also surprised me. https://en.wikipedia.org/wiki/Sulfuryl_fluoride Pretty sure that is what they mainly use in California/USA 10-Aug-20 03:32 PM I’ve wondered if it would be possible to “fumigate” with a sufficiently large Co-60 source. This would only work if you could establish a secure perimeter around the house while the source was exposed. 10-Aug-20 03:32 PM It seems pretty seriously advantageous. No chemical residue. No risk of damaging anything or causing a fire by using heat. You can leave your food in the fridge, and as an added bonus, afterward you can eat your eggs raw without risk of salmonella. Once the source gets removed, people can return immediately, without needing to ventilate the house extensively. 10-Aug-20 03:39 PM That's some proper fifties atomic age thinking right there. 10-Aug-20 03:39 PM Although, say goodbye to your homebrew and sourdough starter. 10-Aug-20 03:39 PM Believe me, if you’ve ever had bedbugs, your thoughts would turn to even more extreme methods, such as arson. 10-Aug-20 03:42 PM Briefly did. 10-Aug-20 03:42 PM Solved that by moving away 10-Aug-20 03:48 PM I'd imagine you'd need many kCi of Co-60 to do a thorough fumigation job of your entire house 10-Aug-20 03:48 PM Hello, bedbugs? Meet Mr. Drop and Run. 10-Aug-20 03:49 PM I'd imagine you'd need many kCi of Co-60 to do a thorough fumigation job of your entire house Anyone know the lethal gamma dose for a bedbug 10-Aug-20 03:51 PM No, I don’t think that much would be needed if you had a remotely operated robot drive the source around the house. 10-Aug-20 03:52 PM Cockroaches can withstand ~675 Sv apparently, smaller bedbugs might even withstand more? 10-Aug-20 03:52 PM Will the robot survive the radiation? 10-Aug-20 03:52 PM Looks like 2kGy 10-Aug-20 03:53 PM So humans kick it at 4-5 Gy but bedbugs can tolerate up to 2 kGy? 10-Aug-20 03:54 PM That's about right 10-Aug-20 03:54 PM Hmmm, maybe this might not be practical without involving a cask of spent fuel.... 10-Aug-20 03:54 PM https://bedbugskilledwithgammairradiation.blogspot.com/ 10-Aug-20 03:57 PM Damn you can find a blog for anything nowadays, those irradiation prices for a pallet is surprisingly very reasonable 10-Aug-20 04:11 PM A few kCi is actually not that much in terms of dose delivered on target when you see the source activity of industrial gamma sterilization irradiators 10-Aug-20 04:11 PM https://www.nordion.com/wp-content/uploads/2018/11/Nordion_Gamma_Irradiators_Datasheet_2018.pdf 10-Aug-20 04:11 PM The smallest one they make has a 60 kCi Co-60 source inside apparently, and the dose rate at 1 m is 600 Gy/hr, with not that much space for the product 10-Aug-20 04:11 PM Scary 10-Aug-20 04:11 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/unknown-93E92.png 10-Aug-20 04:23 PM It seems Nordion has monopoly over the large scale Co-60 production from CANDU reactors, and in the range of hundreds of MCi per year per reactor, the cost for Co-60 is ~$2/Ci 10-Aug-20 04:23 PM Again a surprisingly low number 10-Aug-20 04:50 PM Too bad you can't just roll up to their depot and slam a twenty on the counter and ask for 10Ci of Co-60 10-Aug-20 04:50 PM "Ten Curies of your finest Cobalt Sixty please!" 10-Aug-20 04:51 PM Scary Pretty 10-Aug-20 05:14 PM I wonder how do they handle source cooling in those smaller units 10-Aug-20 05:14 PM A couple hundred kCi of Co-60 can make a pretty good RTG apparently 10-Aug-20 05:14 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/unknown-94243.png 10-Aug-20 05:14 PM https://digital.library.unt.edu/ark:/67531/metadc864391/m2/1/high_res_d/4120928.pdf' 11-Aug-20 08:36 PM Integrals with trig substitutions are annoying. 11-Aug-20 08:36 PM Do the work. Get an answer. Check the answer key. See that there’s a difference. Puzzle over it and realize I was right all along. 11-Aug-20 08:36 PM In the answer to an indefinite integral, the terms sec^2 and tan^2 are equal because “plus a constant” takes away the difference of 1. 11-Aug-20 08:36 PM sin^2 = -cos^2 (because we don’t care about constants) 11-Aug-20 08:36 PM And ln | sec | = -ln | cos | 11-Aug-20 08:36 PM So it’s possible to get a completely wrong looking answer that’s right. 11-Aug-20 09:21 PM Lol lol lol 11-Aug-20 09:21 PM Integrals 11-Aug-20 09:21 PM My dark past 11-Aug-20 09:40 PM https://xkcd.com/2117/ 11-Aug-20 10:04 PM Yeah in my calc 4 class last year I remember talking about how to eye ball a problem, but it pretty much boiled down to choose a route, and be ready to redo all your work if the answer looks too ugly and you need to back out to one of those branches like you mentioned (equivalent statements) 11-Aug-20 10:04 PM I was just like, ugh 11-Aug-20 10:06 PM I'm glad that I was done with 6 calc classes 11-Aug-20 10:06 PM no differential geometry for me 11-Aug-20 10:32 PM 6 classes? 11-Aug-20 10:32 PM I’ve usually seen it broken down as calc 1 = limits and derivatives, some simple integrals. Calc 2 = nasty integrals, practical uses like integrating volumes, infinite series, maybe starting to get into polar coordinates, and calc 3 = multi variable, vector calculus, div/grad/curl, double and triple integrals, etc. 11-Aug-20 10:39 PM differential equations, then two classes on partial differential equations 11-Aug-20 10:39 PM Vector calc and DE can be taken in either order, but vector calc is necessary for PDEs 11-Aug-20 11:22 PM Install Mathematica is the real big brain move 12-Aug-20 03:54 AM meth-a-matica 12-Aug-20 03:54 AM stephen wolfram wants you to believe 12-Aug-20 07:03 AM I recently discovered Wolfram Alpha 12-Aug-20 07:03 AM how did you live without that before 12-Aug-20 07:07 AM And as for classes, I’ve typically seen them called DiffEq, not calc 4-6. 12-Aug-20 07:10 AM And I rarely see them as calc 1-4 12-Aug-20 07:10 AM differential calculus, integral calculus, vector valculus, ODEs. 12-Aug-20 08:55 AM <0xDBFB7#9254> Quick super dumb question, sorry: If a paper says "blending fraction of silicon carbide powders to epoxy resin was 30 %, 35 %, 40 %, 45 % and 50 % by weight", does that make more sense as "mass fraction to total" or "mass fraction to epoxy" 12-Aug-20 11:10 AM @0xDBFB7 I'd gues of total 12-Aug-20 11:10 AM @rdpierce wow I've been using wolfram alpha for more than a decade 12-Aug-20 12:10 PM <0xDBFB7#9254> @nmz787 Thanks! 12-Aug-20 12:10 PM Are you looking at neutron shields? @0xDBFB7 ? 12-Aug-20 12:10 PM <0xDBFB7#9254> Nah, microwave susceptor 12-Aug-20 12:10 PM <0xDBFB7#9254> good guess though! 12-Aug-20 12:12 PM Ah, I'm looking at this boron carbide epoxy mixture for neutron shielding. I got some boron carbide powder and mixed it up with epoxy in 10% mass fraction of epoxy and wow is the resulting mixture brittle 12-Aug-20 12:12 PM Apparently it shields a lot better if you can decrease the epoxy content down to ~5% wt 12-Aug-20 12:14 PM <0xDBFB7#9254> oh man, I'm living in luxury then with these 50% mixtures aren't I 12-Aug-20 12:14 PM I'd imagine SiC mixtures would have similar physical properties 12-Aug-20 12:14 PM <0xDBFB7#9254> ah, and yours specifies as "mass fraction of epoxy". that's cool 12-Aug-20 12:16 PM I think this is probably the cheapest way to do neutron shielding by sheets of solid panels 12-Aug-20 12:16 PM Cast this stuff in between sheets of HDPE 12-Aug-20 12:17 PM <0xDBFB7#9254> There's a lot of research into non-brittle binders for ceramic green casting 12-Aug-20 12:18 PM Hmm, that would be interesting, because even with outside support, I doubt a panel can survive any handling without the boron carbide mixture just cracking to bits 12-Aug-20 12:19 PM <0xDBFB7#9254> The best I'm aware of is crosslinked polyvinyl alcohol 12-Aug-20 12:19 PM <0xDBFB7#9254> strong as PLA at 5% 12-Aug-20 12:19 PM <0xDBFB7#9254> do you have access to chemical suppliers? 12-Aug-20 12:20 PM Not really anymore, and I'm trying to do this on the cheap 12-Aug-20 12:20 PM <0xDBFB7#9254> ah 12-Aug-20 12:20 PM <0xDBFB7#9254> Glutinous Rice flour (don't laugh) provides 11.5 MPa at 3% https://ceramics.onlinelibrary.wiley.com/doi/abs/10.1111/ijag.12060 12-Aug-20 12:26 PM It would be ideal if I can have the exact elemental composition of the binder, so I can evaluate the effectiveness of the shield with Monte Carlo simulations 12-Aug-20 12:26 PM <0xDBFB7#9254> ah, good idea 12-Aug-20 12:26 PM <0xDBFB7#9254> trying to find a few papers, sorry, one sec 12-Aug-20 12:26 PM <0xDBFB7#9254> https://ceramics.onlinelibrary.wiley.com/doi/abs/10.1111/j.1151-2916.1998.tb02377.x is one if you can get methacrylamide 12-Aug-20 12:26 PM <0xDBFB7#9254> and "N,N*-methylene bisacrylamide" 12-Aug-20 12:26 PM <0xDBFB7#9254> it's probably worth trying straight polyvinyl alcohol, which is very easy to get 12-Aug-20 12:26 PM <0xDBFB7#9254> http://www.osti.gov/servlets/purl/4588054/ 12-Aug-20 12:31 PM This is some of the castings with 10% wt epoxy 12-Aug-20 12:31 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/unknown-A2A02.png 12-Aug-20 12:31 PM <0xDBFB7#9254> that's awesome 12-Aug-20 12:32 PM I hope to at least get a smoother surface with alternative binders 12-Aug-20 12:36 PM <0xDBFB7#9254> Various waxes are also pretty good in terms of brittleness; straight 10% paraffin was good enough for casting in our tests, but still not really something I'd want to handle 12-Aug-20 12:36 PM <0xDBFB7#9254> I can give you my bibtex with a bunch of papers, IDK if that'd be helpful 12-Aug-20 12:37 PM I think paraffin wax would be ideal actually 12-Aug-20 12:37 PM I'd appreciate it if you can PM it to me! 12-Aug-20 12:43 PM <0xDBFB7#9254> do you have zotero? 12-Aug-20 12:43 PM Mendeley... 12-Aug-20 12:44 PM <0xDBFB7#9254> ah, perfect 12-Aug-20 12:44 PM <0xDBFB7#9254> ooh sodium alginate is a good one 12-Aug-20 12:44 PM <0xDBFB7#9254> Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/Ceramics_collection-4DAB6.ris 12-Aug-20 12:44 PM <0xDBFB7#9254> (lmk if that's the wrong file extension or if I should send the actual .pdfs too) 12-Aug-20 12:44 PM <0xDBFB7#9254> a lot of that is garbage that's probably unrelated to your problem 12-Aug-20 12:44 PM <0xDBFB7#9254> I've a better sorted version here but I can't figure out how to export sorted folders in zotero 12-Aug-20 12:53 PM At least I have all the titles and urls/DOIs, so it's all good 12-Aug-20 12:55 PM <0xDBFB7#9254> if wax is okay, it's definitely the simplest 12-Aug-20 12:56 PM Wax is probably the best from a neutronics point of view 12-Aug-20 12:56 PM <0xDBFB7#9254> that's a cool word 12-Aug-20 12:56 PM <0xDBFB7#9254> "neutronics" 12-Aug-20 12:56 PM <0xDBFB7#9254> a lot of the papers in there use aqueous solutions, but they are real bastards to dry without cracking the part, so I wouldn't really recommend 12-Aug-20 12:56 PM <0xDBFB7#9254> one problem with waxes (which is what the aqueous solutions are trying to solve) is that because of the viscosity a little bit of pressure is required to cast properly (it doesn't cast freely) - the best search term for waxes is probably "low-pressure injection molding", which predominantly uses wax 12-Aug-20 12:56 PM <0xDBFB7#9254> squishing between HDPE like you seem to have done would probably be enough though 13-Aug-20 12:17 AM Ahhhh 13-Aug-20 12:17 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/unknown-86BC3.png 13-Aug-20 12:17 AM I've been accepted for engineering physics ❤️ 13-Aug-20 12:22 AM congrats! ^^ 13-Aug-20 12:22 AM Thanks ❤️ 13-Aug-20 06:32 AM Awesome!! 13-Aug-20 07:44 AM Well done! You will have a degree in "I build ridiculous things." I'm kinda jealous you will be official. 13-Aug-20 07:45 AM Thanks you two ^^ 13-Aug-20 07:48 AM Is that accepted to graduate or accepted to start? 13-Aug-20 07:49 AM to start 13-Aug-20 07:56 AM Exciting still! 13-Aug-20 07:56 AM In my experience eng phys programs are fairly well run 13-Aug-20 08:00 AM oh I'm so excited 13-Aug-20 08:21 AM here the incoming eng phys students don't know what an oscilloscope is 13-Aug-20 08:22 AM oh god 13-Aug-20 08:22 AM or the concept of error propagation 13-Aug-20 08:22 AM yeah I remember my first semester physics lab 13-Aug-20 08:22 AM or what a capacitor can be used for 13-Aug-20 08:22 AM that was... fun 13-Aug-20 08:22 AM (not) 13-Aug-20 08:23 AM I love how every year "Huh, none of the students finished on time... That's weird!" 13-Aug-20 08:23 AM it's a surprise every time 13-Aug-20 08:23 AM for the last 20 years 13-Aug-20 08:23 AM 50 years 13-Aug-20 08:23 AM it just amazed me that so many people study stuff like this without any apparent prior interest 13-Aug-20 08:23 AM like we learned in high school what most passive components are 13-Aug-20 08:23 AM in physics class! 13-Aug-20 08:23 AM so how do you go to uni to study physics if you weren't interested enough to listen to the physics class 13-Aug-20 08:29 AM inertia 13-Aug-20 08:29 AM So are you entering a 4-year program? 13-Aug-20 08:54 AM aye 13-Aug-20 08:54 AM ends with a bachelor, or i continue with a Masters 13-Aug-20 09:08 AM Well done! You will have a degree in "I build ridiculous things." I'm kinda jealous you will be official. @funranium hey! You don't have to have a degree to do cool stuff or the sciences 13-Aug-20 09:08 AM I wanted to do physics when I was younger - but practical considerations forced me to do the next best thing I could do, which was electronics 13-Aug-20 09:08 AM right now I am starting to get back into learning physics on my own - just because physics and science itself is fun 13-Aug-20 09:10 AM hell yeah it is! 13-Aug-20 09:11 AM the only thing about it though 13-Aug-20 09:11 AM is that experiments really put a dent in your wallet 13-Aug-20 09:22 AM buying a wallet is a waste of money :P 13-Aug-20 09:22 AM It's like buying a shelf while knowing you will never put anything on it 13-Aug-20 09:53 AM lol 13-Aug-20 09:53 AM you're way overqualified to be entering a bachelors 13-Aug-20 09:53 AM I felt like I could have skipped first year even just from high school, and I had about 1% the background you do when I started 13-Aug-20 09:54 AM I daresay that one of the fun things about school though 13-Aug-20 09:54 AM is the lab access 13-Aug-20 09:54 AM half of the work of TAing first year classes is convincing students they should actually read the questions / instructions 13-Aug-20 09:54 AM especially if you get access to stuff that would not normally be accessible to you 13-Aug-20 09:54 AM and also meeting people with like minded interests 13-Aug-20 10:00 AM If you can breeze through uni all it means is less time studying and more time in the lab/building stuff 13-Aug-20 10:00 AM So ur lucky 13-Aug-20 10:01 AM I skipped a lot of classes 13-Aug-20 10:01 AM @charizardrekt tbh that's not really how it works. you still fill up pages of integrals done by hand for random assignments worth 3% of your grade, it takes a lot of time... 13-Aug-20 10:02 AM I mean for me I didn't have to do that but yeah 13-Aug-20 10:02 AM Cuz chem major didn't need too much math 13-Aug-20 10:02 AM Only went up to diff eq 13-Aug-20 10:03 AM Fair enough 13-Aug-20 10:03 AM P chem took some time tho with those integrals 13-Aug-20 10:03 AM IDK I have a friend who got like a 98% average over their undergrad, they spent a lot of time on it 13-Aug-20 10:03 AM Despite... Clearly being able to breeze through it if they wanted... 13-Aug-20 10:04 AM i was bad my last couple years and would skip classes for instrument time 13-Aug-20 10:04 AM Yeah u have to sweat for the grade sometimes 13-Aug-20 10:04 AM I think I skipped precisely 1 class and slept through another one 13-Aug-20 10:04 AM but also I took two classes that conflicted so I skipped all of one, in a way 13-Aug-20 10:05 AM My physics class was so boring I skipped it a few times and basically slept through it 13-Aug-20 10:05 AM Hs physics was harder 13-Aug-20 10:05 AM Ended up with like close to a 100 on that. But whatever orgo took more time to study so it balanced 13-Aug-20 10:05 AM Most classes weren't that easy 13-Aug-20 10:12 AM all the classes related to my research i did really well in.. everything else was kinda ehhh. i have a hard time learning stuff without actually doing it or reading articles over it. kinda sucks for some things because I wish i had more fundamental knowledge, especially for optics stuff which i don't do but am very interested in 13-Aug-20 10:20 AM Everyone also has very different definitions of "really well" 13-Aug-20 10:40 AM id say an A in the class is really well 13-Aug-20 10:40 AM but then ig that means u do rlly well in most ur classes 13-Aug-20 10:43 AM Haha true, I guess really well for me is what I meant. But like >95s in those classes felt pretty good for me since I ended up w/a 3.2 13-Aug-20 10:47 AM But like most people I know in grad school got nearly straight As in undergrad 13-Aug-20 10:47 AM and some of us are not so great 13-Aug-20 10:50 AM I mean there is a reason I have a physics degree. It is fun, other than doing Von Neumann functions by hand, and I lived to build experiments. I was absolute pants at programming however, which is why my degree progression took 10 year pause at the baccalaureate level. 13-Aug-20 10:53 AM yeah I think I probably have the lowest undergrad gpa among the 1st years in my discipline, but I have a good bit of experience so it averages out ig? Idk I’m just excited for research to start (have to wait until end of october when rotations are done) 13-Aug-20 10:53 AM Research experience >> losing sleep over your first B 13-Aug-20 10:56 AM Well, lose sleep if it will cost you financial aid. Otherwise, crowbar your way into any lab you can to start learning the nuts and bolts. Literally, when assembling vacuum chambers and optical benches. 13-Aug-20 10:57 AM Now that I've actually been on the side of picking which undergrad to hire 13-Aug-20 10:57 AM I recognize that I care literally zero what their transcript has on it 13-Aug-20 10:57 AM "Does this person seem like they're able to communicate and will ask for clarification if something is not quite clear? COOL" 13-Aug-20 11:00 AM unless u wanna apply for med school then u have to sweat ur grades 13-Aug-20 11:01 AM yeah I made sure I kept my scholarship... but somedays it felt more important to snag time on instrument or get my experiment prepped instead of going to an 8 AM where I would've been either tired/distracted anyways 13-Aug-20 11:01 AM glad to hear people agree though and I didn't shoot myself in the foot w/ that 13-Aug-20 11:02 AM I mean, I would still attend 8ams 13-Aug-20 11:03 AM 8ams sound so nightmarish 13-Aug-20 11:03 AM When approving work, my first question is always “Who in your lab is going to be building this?” because I know darn well it isn’t the professor doing it. Then the grad student or postoc gets the question out of earshot of the prof “Okay, have you built/done something like this before? If not let me give you some tips.” 13-Aug-20 11:03 AM i had an 8:30 AM and struggled to stay awake 13-Aug-20 11:04 AM I may not get my name on research papers, but I do my best to make sure my folks succeed at what they want to do and not maim anyone in the process. 13-Aug-20 11:05 AM @funranium how many theses have you been thanked in? I’m at like six now 13-Aug-20 11:07 AM Last count, three for certain. I did get third author in one paper but that’s because I outlined an experiment well enough that it was more or less their PhD proposal. 13-Aug-20 11:07 AM Sorry, four. I forgot the Vision Science thesis where I got thanked for supplying them with Black Blood of the Earth. 13-Aug-20 11:10 AM we have one machinist who is the total "oh that sounds like it will take less time to do than to outline, skip the work order and follow me" 13-Aug-20 11:10 AM he programs the CNC manually based on drawings rather than exporting tool paths, and gets stuff done faster than the other people 13-Aug-20 11:10 AM he's getting a thanks from me 13-Aug-20 11:11 AM A master machinist at work is an artist which I will happily sit and watch like it's a concert. 13-Aug-20 11:12 AM they just know what feed rate + RPM to use so perfectly 13-Aug-20 01:06 PM @funranium I am glad to hear you had a 10 year break between BS and PhD 13-Aug-20 01:06 PM It gives me hope 13-Aug-20 01:06 PM i tried to restart last year, taking upper level math one at a time, but working fulltime and having a (then) 1.5 year old was too much 13-Aug-20 01:06 PM My transcript blows tho, I've got some C's 13-Aug-20 01:06 PM Research quality was always high IMO tho 13-Aug-20 01:06 PM Have nat'l lab on my resume 13-Aug-20 01:06 PM And with Intel I'm actually a grant funding advisor :p 13-Aug-20 01:06 PM So I think I'll be OK if/when the time comes to head back 13-Aug-20 01:08 PM But like most people I know in grad school got nearly straight As in undergrad Oh right, that’s how it would normally work wouldn’t it... I’ve got an unpleasantly low amount of proper research experience 13-Aug-20 01:09 PM I enjoy that people assume I have a PhD since I'm voting on whether to fund/continue funding their projects 13-Aug-20 03:05 PM Yeah... I can’t really imagine any program turning you down lol especially if you have that much experience with grants lol 13-Aug-20 03:47 PM How impactful are recommendation/reference letters when it comes to applying to PhD programs? Do references from academia outweigh that from employers... etc.? I'm slightly concerned that I'll be in a bit of a weird spot when I go back to my undergrad professors to ask for these reference letters in a year or two 13-Aug-20 03:54 PM i think they only help if they are good otherwise dont rlly hurt u 13-Aug-20 03:54 PM unless the letter is saying u suck 13-Aug-20 03:55 PM Well I'm trying to make the decision on what letters from who to submit 13-Aug-20 03:55 PM If I'm going to be doing research in nuclear stuff, then submitting a really good letter from a mechanical engineering company I worked under may not have the same impact as a mediocre letter from some faculty member that I worked with for a short time 13-Aug-20 04:06 PM There's usually a maximum of 3 letters you can submit I believe 13-Aug-20 04:06 PM 2 in many cases, even. 13-Aug-20 04:06 PM A lot of grad schools aren't even taking letters, in the application form you just list their emails and they get sent a survey with a couple question boxes. 13-Aug-20 04:06 PM (Maybe "a lot" is too generous, but some) 13-Aug-20 04:06 PM I don't know how academic vs industry references play out, I do know that having external funding is a much better bonus and having someone already agreeing to take you as their student is very useful... 13-Aug-20 04:08 PM having someone already agreeing to take you as their student is very useful... 13-Aug-20 04:08 PM duh 13-Aug-20 04:08 PM I think I will cross that bridge when I come to it, right now I'm not even sure when I want to go back to school again 13-Aug-20 04:10 PM If somebody really wants you, you will get in 13-Aug-20 04:25 PM Congrats @GigaSquirrel !!! 13-Aug-20 04:25 PM I’m in a similar situation. I started in physics, left school, worked in financial IT for 23 years, came to realize how much I hated it, and am now back in school for EE. 13-Aug-20 04:25 PM The problem was I went to UChicago. They practically pride themselves for having no engineering program. 13-Aug-20 04:25 PM I didn’t really realize that what I like about physics was the instrumentation, and I would be happier on the engineering side of things than the science side of things. 13-Aug-20 04:25 PM And all the high energy physics moved to Europe.... 13-Aug-20 04:32 PM Did you look at opportunities in Fermilab or Argonne? 13-Aug-20 04:32 PM Or do they stick to a minimum requirement of a physics/engineering degree? 13-Aug-20 04:34 PM @rdpierce why EE instead of EngPhys? 13-Aug-20 04:44 PM @Mason_Yu actually yes.... It was ironic. 13-Aug-20 04:44 PM I was asked to give talks at two EPICS conferences, but Argonne wouldn’t even give me an interview for an entry level control systems engineering position without a degree. 13-Aug-20 04:44 PM It seems with any technical degree, I’d be fine. But that piece of paper was the limiting factor. 13-Aug-20 04:48 PM Well nowadays degrees are worth less and less, unfortunately national labs are that type of organization that just can't be very flexible at all... The HR people doing the hiring and vetting of applicants have no idea how to truly evaluate your competence and expertise 13-Aug-20 04:48 PM I've submitted my fair share of resumes to national labs, and even with a promise from one of the directors that he'd be interested in taking a look and finding a position for a foreign citizen, my application never reached him 13-Aug-20 04:50 PM Apparently they liked me enough to change the venue of the reception. (They wanted me to be able to serve people beer samples brewed with EPICS. Doing this on the Argonne campus wasn’t possible.) 13-Aug-20 04:50 PM Woah I gotta check out EPICS 13-Aug-20 04:51 PM I made a name for myself as the first person to brew beer with EPICS. 13-Aug-20 04:51 PM So I gave a “Kegnote Address”. 13-Aug-20 04:52 PM I think the “degrees are worth less” thing is kinda weird 13-Aug-20 04:52 PM It’s less notable, because so many people have them, but it’s also less necessary, because so much of the information is now available online 13-Aug-20 04:55 PM Degrees are worth less in their ability to serve as a metric for how much you know and how much you can do 13-Aug-20 04:55 PM For sure 13-Aug-20 04:55 PM I don’t know how their use as an employability tool has shifted though 13-Aug-20 04:55 PM Since that’s not my reason for having one 13-Aug-20 04:56 PM The problem is that it becomes a database filter. 13-Aug-20 04:56 PM People toss it on to reduce the number of resumes they have to look at. 13-Aug-20 04:56 PM https://epics.anl.gov/meetings/2018-06/talks/06-14/AM/5.4-Kegnote.pdf 13-Aug-20 04:56 PM https://conference.sns.gov/event/11/contributions/35/ 13-Aug-20 04:56 PM EPICS and Beer!!! 13-Aug-20 05:02 PM Can we collaborate ? 13-Aug-20 05:02 PM I can centrifuge stuff and you can put it in the beer 13-Aug-20 05:02 PM "Beer consisting of molecules that have recently had very high angular momentum" 13-Aug-20 05:10 PM And wow you've got a really well equipped makerspace there @rdpierce 13-Aug-20 05:10 PM Not every makerspace can have 2 SEMs, ICP-MS and XRF spectrometer 13-Aug-20 05:21 PM @nmz787 Not a PhD, merely a Masters of Health Physics. A PhD wouldn't have added much to my earnings but the time sink would've been dramatic. I do practical implementation, not advancement of the field of health physics research. Other people are welcome to chase microrems as they explore ever lower regions of the dose-response curve to try to fight against Linear-No Threshold. And the PhD thesis I floated would have vanished into a DOE vault, ne'er to be seen again. Assuming it got approved and hadn't already been done but I just didn't know about it, because DOE vault. 13-Aug-20 05:55 PM Well, ehhh.... we lost our primary lab space. The ICP-MS was never fully brought online. (We got it to strike a plasma, and the sample solution only registered lighter Z numbers. I think the quad was too far out of calibration to auto-calibrate. I found instructions to go into the factory calibration mode mode, but things got stalled.) 13-Aug-20 05:55 PM None of the SEMs work and were put in storage. One used to but the backing pump died, and it appears the fiber optic serial line to the vacuum board isn’t happy, but I think it is easily repairable. 13-Aug-20 05:55 PM The scint in the E-T is practically dead. We are getting very poor contrast. 13-Aug-20 05:55 PM We do have a handheld XRF gun and a desktop XRF (which requires LN2) 13-Aug-20 05:55 PM The X-ray cabinets are interesting new developments. 13-Aug-20 05:55 PM The FT-IR’s have... issues.... 13-Aug-20 05:55 PM @idmb what do you want to put in beer? 13-Aug-20 06:09 PM Centrifuged stuff 13-Aug-20 06:09 PM That’s about all I can contribute 13-Aug-20 07:53 PM See, now I’m worried. Saying “Centrifuged stuff” without further details could include UF6, in which case I’d wonder if you were trying to have a kegger with Galen Winsor. ️ 13-Aug-20 07:53 PM Which reminds me.... story time with Ryan..... 13-Aug-20 07:53 PM While I was giving the talk at ORNL, I heard about a huge PR fiasco. 13-Aug-20 07:53 PM DOE was told to buy Iranian heavy water. 13-Aug-20 07:53 PM Due to JCPOA (gosh how I miss it....) Iran had to divest itself of heavy water. 13-Aug-20 07:53 PM DOE needs heavy water for experiments at national labs. They typically buy from Canada, but apparently the specs on the Iranian heavy water were better, so they said sure. 13-Aug-20 07:53 PM So, you’d think this was a win-win, Iran could comply with the JCPOA, we get better heavy water. Well... then the press got wind of the deal and the SHTF. 13-Aug-20 07:58 PM because "we're sending iran money" 13-Aug-20 08:00 PM Congress passed a bill to block money going to Iran for heavy water, but it did no good because this was already purchased and paid for. 13-Aug-20 08:00 PM Well, delivery time came. 13-Aug-20 08:00 PM It was shipped in stainless steel BEER KEGS. 13-Aug-20 08:00 PM With Farsi writing engraved on it. 13-Aug-20 08:00 PM Of course, this leads me to wonder why an Islamic country has beer kegs, but I’ll digress on that point. 13-Aug-20 08:00 PM So after the kegs are delivered, and the bad press hit, the big wigs at ORNL involved in the deal apparently got to keep the emptied kegs as souvenirs. 13-Aug-20 08:03 PM damn, that's amazing 13-Aug-20 08:03 PM oh more liberal people in Iran definitely drink esp. in smaller towns 13-Aug-20 08:03 PM How much heavy water was sent over 13-Aug-20 08:06 PM I tried to beg and plead to get ahold of one for my EPICS beer system because... come on... beer brewed in an Iranian heavy water keg, with a control panel with Minuteman and Thor panel lights, and open source control systems software used by national labs that was originally intended for a LANL particle accelerator in a satellite to shoot down ICBMs as part of Reagan’s Star Wars would go beyond peak nuclear awesomeness. 13-Aug-20 08:07 PM Do you have a write up over your beer system 13-Aug-20 08:08 PM Heck, I offered to plasma cut the lids off and mount them on plaques, so they’d have cool souvenirs that don’t take up too much space, and I could put the kegs to use. But alas.... 13-Aug-20 08:08 PM imagine heavy beer tho 13-Aug-20 08:08 PM Write up? Kind of.... 13-Aug-20 08:08 PM There are the two decks I linked. 13-Aug-20 08:08 PM And a couple blog entries. 13-Aug-20 08:09 PM Oh missed those further up 13-Aug-20 08:09 PM Ben Krasnow did argon-ated beer 13-Aug-20 08:09 PM He has a video on it, was disappointing he said 13-Aug-20 08:11 PM https://pumpingstationone.org/2015/12/cnc-beer-part-1-overview-and-theory/ 13-Aug-20 08:11 PM https://pumpingstationone.org/2015/12/cnc-beer-part-2-system-design/ 13-Aug-20 08:11 PM https://pumpingstationone.org/2016/02/cnc-beer-part-3-fusion-360-and-waterjet-overkill/ 13-Aug-20 08:11 PM The last part includes video of the Analytics Lounge “pink” waterjet. 13-Aug-20 08:17 PM Beer science would be a cool field 13-Aug-20 08:17 PM I’ve spent the last 2-3 years looking at ripening processes on surfaces so beer foam is like one of my favorite things to watch and see all the foam science in real time 13-Aug-20 08:17 PM Also if anyone is ever interested in foam science this site is an insanely good resource for really any foam, emulsions, etc 13-Aug-20 08:17 PM https://www.stevenabbott.co.uk/practical-surfactants/foam-basics.php 13-Aug-20 08:17 PM great surfactant resource 13-Aug-20 08:24 PM My “science” is primarily focused on accurate temperature control during the mash. 13-Aug-20 08:24 PM With the intention of repeatability. 13-Aug-20 08:24 PM The mash temperature profile controls enzyme activity, which controls starch to sugar conversion, how much is fermentable, how much body the beer has, etc. 13-Aug-20 08:24 PM Grains are highly standardized. 13-Aug-20 08:24 PM So the biggest error source is the brewer’s temp control. Amateur home brewers typically don’t value repeatability, but professionals do. And if you’re tuning a recipe, how do you know if, say, the intended change to the grain Bill was responsible, or the unintended temperature change to the mash? 13-Aug-20 08:24 PM The goal was to maintain +/- 0.5 degree F, which I believe I did. 13-Aug-20 08:29 PM hmmmm would a cheap pid/thermocouple to improve results from a home brew starter kit? 13-Aug-20 08:29 PM I have a couple of gas solenoid valves around... 13-Aug-20 08:33 PM I already have gas furnace controllers 13-Aug-20 08:33 PM Am using DS18B20. 13-Aug-20 08:33 PM Much more accurate than thermocouple, and digitally controllable. 13-Aug-20 08:34 PM oh cool 13-Aug-20 08:34 PM PID doesn’t work well for this application. 13-Aug-20 08:34 PM PID doesn’t deal well with lag. 13-Aug-20 08:34 PM ok... I may try something like this https://pubs.acs.org/doi/abs/10.1021/ac048726r 13-Aug-20 08:35 PM It assumes instantaneous effect. 13-Aug-20 08:35 PM I engineered my own control algorithm that requires some hand tuning but works very well. 13-Aug-20 08:35 PM adjust flow rate as needed digitally in response to temp could probably keep it fairly accurate 13-Aug-20 08:36 PM My valves are open or closed. No computer control of flow. 13-Aug-20 08:36 PM this is just open close valves but needle valve before and power of two flow through the needle valve 13-Aug-20 08:36 PM So each solenoid is a bit and you can get however many bits worth of resolution 13-Aug-20 08:37 PM What I do is keep a rolling measurement of how many seconds out of the past 30 that the burner is on. 13-Aug-20 08:37 PM Multiply that by a constant. Add it to current temp. That’s a projected temp. Then I just use a simple thermostat with deadband algorithm, with projected temp as input. 13-Aug-20 08:37 PM That constant needs a bit of tuning, but it works beautifully. 13-Aug-20 08:37 PM Doesn’t overshoot. 13-Aug-20 08:37 PM That was a huge problem for me. There’s so much thermal lag between the burner firing and the thermometer probe registering an increase.... 13-Aug-20 08:37 PM This will keep the burner on to cause a programmed temperature change, cut off well in advance of an overshoot, and give a few small burns to inch it there. 13-Aug-20 08:37 PM Next I use that to control the water bath temp in my heat exchanger. 13-Aug-20 08:37 PM I want the output of the heat exchanger to be at a setpoint. 13-Aug-20 08:37 PM What works perfectly is take the error of the beer below the setpoint, double it, and add it to the setpoint. 13-Aug-20 08:37 PM I use a calcout record in EPICS to continuously adjust the setpoint of the heat exchanger based on the beer temp coming out of the heat exchanger. It works perfectly. 13-Aug-20 08:45 PM honestly I’d like heating to be fairly precise, but I’d be fine with a little more error even 13-Aug-20 08:45 PM rolling measurement of valve on time is clever though I like that...way easier than trying to do something like the paper I linked (though I have played with the build from that paper before it’s pretty nifty) 13-Aug-20 09:10 PM I thought a properly tuned PID was specifically useful when you have lag. 13-Aug-20 09:10 PM Also @rdpierce there’s a lot more science to put into your beer: https://onlinelibrary.wiley.com/doi/10.1002/0470027320.s6502 https://drpballen.wordpress.com/2017/02/14/exploring-raman-spectroscopy-for-beer/amp/ https://www.laserfocusworld.com/test-measurement/research/article/16565129/raman-spectrometer-to-taste-ten-types-of-beer-tell-them-apart 13-Aug-20 09:10 PM Ah, other methods do lag much much better. 13-Aug-20 09:37 PM I’ve seen control systems docs talk about how PID does not account for lag. All you can do is dial it back so it is less responsive. That stops the oscillations, but at the cost of being far away from your setpoint. 13-Aug-20 09:37 PM This is a control algorithm that accounts for lag: 13-Aug-20 09:37 PM https://en.wikipedia.org/wiki/Smith_predictor 13-Aug-20 09:37 PM https://www.controleng.com/articles/overcoming-process-deadtime-with-a-smith-predictor/ 13-Aug-20 09:37 PM The trouble is that you have to have a mathematical model of your plant to use it. 13-Aug-20 09:37 PM And there isn’t necessarily a fixed time when the results of the process control reach the sensor. 13-Aug-20 09:37 PM So I decided to roll my own control algorithm, experimented with heating water, and tried it with beer. 13-Aug-20 09:37 PM But a Smith Predictor is what you do instinctively in a shower stall where the shower head has a long hose of small diameter.... 13-Aug-20 09:37 PM So that you aren’t alternately scalding yourself and freezing yourself. 13-Aug-20 09:37 PM This is one reason I’m glad I’m in EE. Gives me an excuse to take a formal control systems theory class, and having implemented this kind of stuff (I also did PID for a fermenter controller) I’ve probably got an experiential basis that few in the class will have. 13-Aug-20 09:37 PM E.g. integral windup = the time I nearly froze my beer because I turned the air conditioner circuit breaker off and let the integral error term in the control algorithm keep accumulating. I then turned the circuit breaker on and left. 13-Aug-20 09:37 PM It tried to freeze the beer!!! 13-Aug-20 10:04 PM @rdpierce I mentioned how my buddy recoated his ET scintillator easily and is getting great performance out of it 13-Aug-20 10:04 PM Guy I part time work for told me today that he recoated his scintillator with new zinc sulfide powder using "mop and glow" as the binder 13-Aug-20 10:05 PM I’ve seen replacements for $100. 13-Aug-20 10:05 PM This was months back 13-Aug-20 10:05 PM He actually had replacements 13-Aug-20 10:05 PM But messed one up during installation, said the lightest smudge with his finger removed most of the coating 13-Aug-20 10:05 PM He happened to have the powder on hand from another experiment 13-Aug-20 10:06 PM I’m... nervous about replacing it. 13-Aug-20 10:06 PM So figured he'd give it a try with a nice heavy coating 13-Aug-20 10:06 PM And lo and behold the thick coating he made worked great 13-Aug-20 10:06 PM I think he said he painted the mop and glow on with a small brush, then just pressed the scintillator disc into the powder 13-Aug-20 10:06 PM And maybe brushed his finger or brush over it again to dislodge any obviously loose particles 13-Aug-20 10:06 PM Reassembled, done 13-Aug-20 10:08 PM But it’s a moot point. The machine is in storage, has a dead roughing pump, and I’m just hoping the vacuum board communication issue is the fiber isn’t seated properly. 13-Aug-20 10:08 PM That is interesting.... 13-Aug-20 10:09 PM The reassembly was tougher in that the instructions for the detector didnt mention a key step of sitting the unit upright so the disc could rest on the tube that exits the vacuum, and then bringing the inner portion down over it 13-Aug-20 10:09 PM What brand instrument? 13-Aug-20 10:09 PM I am unsure of the detector, but its an FEI FIB 200 13-Aug-20 10:10 PM This is why I’m nervous. I don’t have instructions specific to this machine. Mine is a Leica S430. 13-Aug-20 10:10 PM It was literally just a tube and an o-ring for keeping vacuum, using the glass disc as the cap 13-Aug-20 10:10 PM It’s a bizarre hybrid of digital and analog, custom electronics and a 486 PC-on-an-ISA-card running Windows 3.11 13-Aug-20 10:11 PM Tricky part was how to keep it centered while reassembling 13-Aug-20 10:12 PM Vintage 90s tech. 13-Aug-20 10:14 PM Hehe, the FIB200 doesn't get much better, custom electronics and a custom PC motherboard where the CPU is on a card, so the mobo is more of a backplane... Runs win NT 4.0 13-Aug-20 10:14 PM So I guess pretty similar since you just said PC on ISA card :p 13-Aug-20 10:46 PM Yes, same deal. 14-Aug-20 03:37 PM Totally off-topic but I'm adopting a dog with my partner and since Canada has few strays, most rescues come from the states / elsewhere... Normally you'd go pick them up, but COVID. So our little guy is getting sent via courier for pickup today, and my lord look at him + the other girl coming over today: 14-Aug-20 03:37 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/117646151_216797826427924_2394260232378019-948B4.png 14-Aug-20 03:39 PM yay! 14-Aug-20 03:39 PM Awwww 14-Aug-20 03:41 PM also thanks for getting them from a shelter 14-Aug-20 03:42 PM Without the influx of mexican / american dogs it's surprisingly difficult to get them from shelters here 14-Aug-20 03:42 PM There are some in much more rural areas that pick up the strays on reserves, but there's nowhere near enough of those to meet the urban demand 14-Aug-20 04:41 PM I won't buy a dog until I move rural with at least 5 or 10 acres, and then it'd be mostly to keep wildlife away, like coyotes/elk/deer/cougar/bear 14-Aug-20 04:41 PM My son would enjoy the playmate too 14-Aug-20 05:58 PM a lot of people seem to think big yard = happy dog but then don't interact with it enough 14-Aug-20 09:04 PM he's so adorable and so sleepy 14-Aug-20 11:40 PM Puppers! 14-Aug-20 11:40 PM Any of you aware of Clean Futures Fund and what they are doing for Chernobyl doggos? 14-Aug-20 11:40 PM A while back, they had approval to adopt puppers born in the Zone to families outside the Zone. Imagine adopting a dog with that kind of backstory.... 15-Aug-20 04:02 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/image0-6E9E8.jpg 15-Aug-20 04:02 AM i like cats 15-Aug-20 04:06 AM (random cat pic from the twitters) 15-Aug-20 04:06 AM but super cute 15-Aug-20 12:44 PM https://twitter.com/ArmyStrang/status/1294485481376317440 15-Aug-20 12:47 PM heh, I found a wood sign like that some time ago and a friend of mine digitized it 15-Aug-20 12:47 PM one sec 15-Aug-20 12:47 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/unknown-FBA22.png 15-Aug-20 12:47 PM I have the SVGs somewhere here 15-Aug-20 12:47 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/Atom-Comm-fur-Lukas_mono_transp_1-E69F2.svg 15-Aug-20 12:47 PM am still looking for someone with a laser cutter 15-Aug-20 01:50 PM Ok, I’m laser cutting this for the reactor 15-Aug-20 02:46 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/15975279898801440885242195715572-06B41.jpg 15-Aug-20 02:47 PM missing the step where you start spending all your free time discussing that hobby online, without actually partaking 15-Aug-20 02:49 PM ...that hits a bit close to home hyperfocuses on the next project 15-Aug-20 03:59 PM missing the step where you start spending all your free time discussing that hobby online, without actually partaking 3 real 5 me 15-Aug-20 03:59 PM tho i have been following through a bit more 16-Aug-20 01:11 PM dog so good 16-Aug-20 01:11 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IDMB0495_copy_smol-44E92.JPG 17-Aug-20 10:42 AM Finally in a town with a good scrapyard 18-Aug-20 04:05 PM @𝓕ermion Since you love tidy stuff, I assume you have tons of velcro or other reusable cable ties ? 18-Aug-20 04:37 PM Got my earthworks and grading permit issued today. First step in the new house/shop build! 18-Aug-20 04:40 PM <𝓕ermion#6024> @idmb honestly I just zip tie things and clip them lol. 18-Aug-20 04:40 PM <𝓕ermion#6024> but I really should switch to velcro 18-Aug-20 04:43 PM What's really nice about the velcro 18-Aug-20 04:43 PM is if you have cable tied along something 18-Aug-20 04:43 PM you can just add another with the same piece of velcro 18-Aug-20 04:43 PM just lift the flap a little, tuck it in, golden 18-Aug-20 08:36 PM We should all be add useful as Velcro. 18-Aug-20 11:52 PM As Velcro was mentioned, do someone has any experience with high-temperature stainless-steel Velcro? I found it online, but it seems to be extremely expensive... 19-Aug-20 01:06 PM didn't even know that existed tbh 19-Aug-20 01:07 PM I had a rainjacket with rubber velcro 19-Aug-20 01:07 PM it was awesome 19-Aug-20 01:07 PM didn't catch dirt or anything 19-Aug-20 02:42 PM It took a lot longer to set up than it probably should have, but I'm pretty sure I have my OPO/OPA set up actually working. At least the part that outputs light. I still need to figure out how I'm going to add the Wavemeter to the set up and test my scanning automation software, but finally. Mid IR light. And I can even hear the PAS of the water vapor in the air 19-Aug-20 02:42 PM Congrats! 19-Aug-20 02:54 PM Thanks. It's kind of embarrassing that 95% of my issues were me forgetting to tighten the clamps to keep it from moving but... 19-Aug-20 02:55 PM Just don't tell your successor... Or, please do? 19-Aug-20 02:59 PM Eh, I think I can keep that a secret. Maybe tell them the importance of clamping your optics down, but not how I know. It also would have only been like a week mistake rather than the months long one if it wasn't for covid 19-Aug-20 02:59 PM Though I guess I do need to fix the alignment a little bit later. The two paths are ~a cm off 3m downfield which doesn't matter for the planned experiments but will if we want to do DFG with it 19-Aug-20 03:01 PM Meanwhile 19-Aug-20 03:01 PM my laser has been down for a month 19-Aug-20 03:01 PM because it was 15% below specced power 19-Aug-20 03:01 PM so PI wanted to call a tech because under warranty 19-Aug-20 03:01 PM tech couldn't fix it the first week 19-Aug-20 03:01 PM gone for two weeks 19-Aug-20 03:01 PM comes back, thinks he found the problem but hasn't fixed it 19-Aug-20 03:03 PM RIP 19-Aug-20 03:03 PM Not gonna lie I'm really glad that I'm getting manual level power output atm 19-Aug-20 03:03 PM And thats without optimizing crystal positions 19-Aug-20 03:04 PM My issue 19-Aug-20 03:04 PM is that the specced power 19-Aug-20 03:04 PM is for something we don't care about 19-Aug-20 03:04 PM Because if I was getting half...it would still suck because its not really done 19-Aug-20 03:04 PM There's a beamsplitter before the pulse compressor, and the pre-compressed pulse is the important one 19-Aug-20 03:04 PM I need about 0.1W of compressed but the spec is 13W 19-Aug-20 03:05 PM Why are you fixing it if you don't need the power? 19-Aug-20 03:05 PM so here he is fiddling knobs to get that back 19-Aug-20 03:05 PM Because the laser is under warranty 19-Aug-20 03:05 PM Ah. I guess that makes sense 19-Aug-20 03:06 PM It does but this happened the week after I got the droplets working nicely 19-Aug-20 03:06 PM Currently the pre-compressed is in such a poor state that two beams are coming out of the laser lol 19-Aug-20 03:06 PM Oof 20-Aug-20 12:35 PM TFW you can tell it's raining outside because the HVAC has a ton more condensation than normal and it drips... 20-Aug-20 04:14 PM nothing like running out of sample with just an hour left in the day -_- 20-Aug-20 06:19 PM Better than getting everything ready just to find out that your sample decomposed as you start taking spectra 20-Aug-20 08:05 PM Cadaver spectroscopy 20-Aug-20 10:17 PM https://github.com/cdanis/sandia-public-license 21-Aug-20 08:20 AM That made my day. Thanks @Addison-110m 21-Aug-20 08:20 AM School just started. It’s online at an accelerated pace, so I’m feeling like a cement truck hit me. 21-Aug-20 08:31 AM Accelerating it is one way to make online more engaging I guess 21-Aug-20 08:34 AM Yeah, it’s typically 2x the pace of normal classes. 21-Aug-20 08:34 AM Circuits + Diff Eq for me this half semester. 21-Aug-20 08:45 AM Should be in the other order IMO 21-Aug-20 08:45 AM or do you mean together 21-Aug-20 08:45 AM I guess you mean together 21-Aug-20 08:45 AM Diff eq applies to circuits really nicely. 21-Aug-20 11:55 AM https://www.youtube.com/watch?v=mKZtb6dTWSY What an amazing video 21-Aug-20 12:31 PM Yes, two classes, taking both this half semester. 21-Aug-20 12:31 PM Systems and Signals, and Linear Algebra are waiting for me next half semester if I can survive. The whole course is at 2x speed, packed into 7 weeks. 21-Aug-20 12:31 PM Hey, who was it that tweeted the “This is not a place of honor” Arby’s sign? 21-Aug-20 12:40 PM all the best with that 21-Aug-20 12:40 PM Signals and Systems can take a while to understand 21-Aug-20 12:40 PM in my school - they skippsed signals and systems entirely 21-Aug-20 12:40 PM went straight on to DSP 21-Aug-20 12:40 PM was doing okayish in the first half of the semester 21-Aug-20 12:40 PM utterly slaughtered by the finals 21-Aug-20 12:40 PM they did some grade magic I believe 21-Aug-20 12:40 PM because I know I couldn't have gotten more than 20 marks on that paper 21-Aug-20 12:40 PM still passed 21-Aug-20 01:01 PM so - that was kind of the last official day of school! still doing the number 4 ceert exam next week 21-Aug-20 01:01 PM it's basically still 1 more week, just official lenght of quartyer and whatnot 21-Aug-20 01:13 PM Seems odd to take diff eq before linear alg 21-Aug-20 01:14 PM I took linear algebra in 4th year 21-Aug-20 01:14 PM as an elective, because it was weird that I hadn't had to take it 21-Aug-20 03:23 PM I am highly considering going to an engineering college now... to learn everything that I actual need too know - th at isnt told in watchmaking books - to engineer/design a well funcitoning watch 21-Aug-20 03:23 PM the plan is to move back to Ohio, so maybe OSU 21-Aug-20 03:23 PM but, I kind of need in person classes, so we'll see how long it takes to get to that phase 21-Aug-20 03:27 PM 2029 21-Aug-20 03:29 PM meh, I got a little time 21-Aug-20 03:29 PM I actually want/need to spend a year+ doing the R&D on the design and whatnot (manufacturing procedures, etc) 21-Aug-20 03:29 PM and I think I have 6mo left of house renoo here before moving back, anyways 21-Aug-20 04:11 PM That made my day. Thanks Oh I’m really glad it did 21-Aug-20 08:10 PM @Noxz too bad we weren't closer than 3 hours away, would be glad to barter/trade time on helping with house projects 21-Aug-20 11:04 PM I've been trying to not recieve help - because the goal is to sell the house once I am done.. I don't plan on staying here 21-Aug-20 11:04 PM I merely moved here for school 22-Aug-20 05:50 AM http://instrumentation.obs.carnegiescience.edu/ccd/imacs/photos.html 22-Aug-20 05:50 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/unknown-59DDE.png 22-Aug-20 05:50 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/unknown-5E4AD.png 22-Aug-20 05:50 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/unknown-79975.png 22-Aug-20 05:50 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/unknown-96C2E.png 22-Aug-20 11:24 AM @Noxz I wouldn't mind you selling... I just am too hesitant to hire random help and thus end up doing everything myself 22-Aug-20 11:32 AM ah, I hear you on that 22-Aug-20 11:32 AM the only thing I have hired thus far was to remove ~3k lbs of tree that fell on the roof 2 years ago 22-Aug-20 12:38 PM @piGuy probably not too interesting to you quality wise, but just found this and seems like a nice wholesome overview of the subject for "laypeople" https://www.hackster.io/dnhkng/the-pocket-lamp-illuminating-sars-cov-2-3a1d17 23-Aug-20 07:11 AM huh 23-Aug-20 07:11 AM TIL 23-Aug-20 07:11 AM Hamamatsu as we know it doesn't operate in china 23-Aug-20 07:11 AM but there's bejing hamatsu photonics 23-Aug-20 07:11 AM http://www.bhphoton.com/EN/index.aspx 23-Aug-20 07:11 AM and they have their own PMTs and whatnot 23-Aug-20 07:11 AM or at last their own names 23-Aug-20 07:48 AM LA can be taken before or after DiffEq. 23-Aug-20 07:48 AM Because LA helps DiffEq, some students have suggested taking it first. 23-Aug-20 07:48 AM Unfortunately, Circuits (which is a prerequisite to nearly every EE except a few digital logic classes that I’ve already taken) requires DiffEq as either a prerequisite or as concurrent enrollment. 23-Aug-20 07:48 AM I can’t put off taking Circuits any longer, so that pretty much locks me in. 23-Aug-20 07:48 AM Both DiffEq and LA make extensive use of MATLAB. 23-Aug-20 07:48 AM In other news, I finished the first lab for Circuits yesterday. 23-Aug-20 07:48 AM What I learned: LTSpice considers resistors as POLARIZED (at least for determining current flow) but it doesn’t draw any kind of arrow on the symbol. So when it reports current through each resistor, it’s frequently negative. But rotating the resistor changes that. 23-Aug-20 07:55 AM Both DiffEq and LA make extensive use of MATLAB. Why?..... 23-Aug-20 07:55 AM I get it for like a second LA course, and a numerical methods course after all your ODE/PDE classes 23-Aug-20 07:55 AM Just seems weird to include with the teaching 23-Aug-20 07:55 AM @rdpierce Are you using it via drag-and-drop? I don't remember ever encountering that problem using netlists 23-Aug-20 08:12 AM Yes, dragging and dropping resistors into a schematic. 23-Aug-20 08:13 AM Personally I always found the netlists faster to make / troubleshoot, though the analysis part was always... annoying 23-Aug-20 08:13 AM It has been a while and I have long since forgotten how to SPICE 23-Aug-20 08:33 AM The LTspice must flow.... 23-Aug-20 08:33 AM He who controls the LTspice controls the universe. 23-Aug-20 08:34 AM More like controls the CPU for an unreasonable amount of time 23-Aug-20 08:34 AM Numerical sims are a great way to waste compute cycles 23-Aug-20 08:36 AM and disk space 23-Aug-20 08:36 AM I've used LTSpice for not so transient analysis 23-Aug-20 08:36 AM ended up with a multiple GB set of files xD 23-Aug-20 08:47 AM I have free supercomputer access 23-Aug-20 08:47 AM 50 core years 23-Aug-20 08:47 AM No need for it... but hey, maybe sometime ? 23-Aug-20 08:47 AM One peer uses it extensively and has to pay for extra time 23-Aug-20 08:48 AM Well if you get that much data, your CPU must have been very busy. Did you use things like initial constraints in your simulation? 23-Aug-20 08:51 AM nope 23-Aug-20 08:51 AM just trans 5 23-Aug-20 08:51 AM (which is obviously not so transient) 23-Aug-20 11:06 AM In my last few math classes we only used geogebra and desmos 23-Aug-20 11:06 AM But I didn't take LA or DiffEq yet 23-Aug-20 11:55 AM If I want something to semi-accurately log power outages 23-Aug-20 11:55 AM would an AC relay with a battery-powered timer connected to the NC circuit be stupid or nice and simple? 23-Aug-20 11:55 AM I care about amount of time off, not when or frequency 23-Aug-20 12:46 PM oh neat 23-Aug-20 12:46 PM apparently I just got a helium compressor + hoses 23-Aug-20 12:47 PM just missing the fun part 23-Aug-20 12:47 PM I already got that 23-Aug-20 12:47 PM Oh 23-Aug-20 12:47 PM Sweet 23-Aug-20 12:47 PM what are you going to chill? 23-Aug-20 12:47 PM first I'll try air liquefication 23-Aug-20 12:47 PM then maybe some superconductor fun? 23-Aug-20 12:47 PM don't have anything specific in mind tbh 23-Aug-20 12:47 PM I'd love to try to rebuild my HPGe for compressor cooling 23-Aug-20 12:47 PM but that will be a very hard process 23-Aug-20 03:06 PM just trans 5 @SleepyOwl Joyce as in LTSpice with a .tran 5 directive? That's doing a 5 second transient analysis. If your circuit has some kind of oscillation or whichever kind of behavior with frequent changes, this may easily be a CPU intensive task. Afaik LTSpice chooses the timestep dynamically. That has worked well for me so far and I usually get very small .raw files generated 23-Aug-20 05:58 PM yes - some of these circuits are say, switched mode converter simulations, etc 23-Aug-20 06:36 PM LTSpice was released specifically for switching power supply development, and optimized for those kind of simulations. 23-Aug-20 06:36 PM So I imagine it would be good for that. 24-Aug-20 12:39 AM Stuff I wake up to... 24-Aug-20 12:39 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/Screenshot_20200824-073224-1E19B.png 24-Aug-20 12:39 AM This feels like a glimpse into the life of @funranium 24-Aug-20 01:02 AM Hmm, new nominee for Darwin award? 24-Aug-20 07:41 AM Depends.. does the world rely on me extracting the beryllium from them? If not I think they are quite happy in their rock form! 24-Aug-20 07:42 AM my thoughts exactly 24-Aug-20 07:42 AM Be is far from expensive 24-Aug-20 08:06 AM if there are laser cowboys 24-Aug-20 08:06 AM what are beryllium people? 24-Aug-20 08:37 AM sugar fiends 24-Aug-20 10:28 AM Be Bois 24-Aug-20 03:28 PM I lost the interlock defeat bracket, so I had to improvise 24-Aug-20 03:28 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/20200824_173139-4B836.jpg 24-Aug-20 03:28 PM Not shown is the magnet to beat the magnetic switch 24-Aug-20 03:30 PM we need more emotes 24-Aug-20 03:30 PM a laser-related one 24-Aug-20 03:30 PM perhaps someone shooting themselves in the eyes 24-Aug-20 03:30 PM Laser eyes! 24-Aug-20 03:58 PM so a ball bearing on a shokacola lid was not enough and you had to add the socket too? :D 24-Aug-20 04:03 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/lasereyes-A386A.png 24-Aug-20 04:03 PM pew pew 24-Aug-20 04:08 PM need moar emoji 24-Aug-20 04:08 PM we have like 40 more slots surely we can come up with some cool ones 24-Aug-20 04:23 PM Actually yes. It honestly surprised me that it wasnt 24-Aug-20 11:00 PM haha what a cool emoji 25-Aug-20 12:53 PM anyone have one of these brushless disc drive motors laying around 25-Aug-20 12:53 PM accidentally mess mine up drilling it today 25-Aug-20 12:53 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/image0-B0279.jpg 25-Aug-20 01:26 PM i have crates and crates of old hard drives 25-Aug-20 01:26 PM that looks like one'o those 25-Aug-20 01:40 PM I may have not messed mine up that bad not that I have the rotor off and I’m looking at it.. nothing epoxy shouldn’t fix 25-Aug-20 01:40 PM but on the off chance it’s not I may hit you up about it because they’re weirdly hard to find on eBay? 25-Aug-20 01:40 PM figured “brushless dvd motor” would do the trick but I guess not 25-Aug-20 01:47 PM @mike crb May I ask what are you going to use it for? 25-Aug-20 02:01 PM spincoater 25-Aug-20 02:01 PM drill through that stationary bit in the middle, connect vacuum line, put oring on the rotor 25-Aug-20 02:01 PM want one with a vacuum chuck instead of having to screw it down 25-Aug-20 02:01 PM screw the substrate into place i mean 25-Aug-20 02:29 PM The ebay cheapo coaters use sticky tape I think 25-Aug-20 02:29 PM But yeah vacuum is way nicer 25-Aug-20 02:29 PM Years ago I found a vacuum feedthrough bearing for cheap 25-Aug-20 02:51 PM i have a cheap hvac pump i got forever ago, and with a little epoxy this one should work fine I think...should be thin enough to fit glass slides atleast! 25-Aug-20 03:36 PM i still want to steal @Nixie 's idea and use a computer fan with PWM/speed control for stuff like that 25-Aug-20 03:36 PM similarly need to build an optical shutter for a lock-in amp, that seems like a.. well, one way to do it 25-Aug-20 03:36 PM i suspect i may quickly find out why optical shutter wheels cost $$$$ 25-Aug-20 04:07 PM yeah plan on controlling speed for this for sure, also going to hook the pump to a relay so I can just set the speed, set the sample on the chuck and hit go 25-Aug-20 04:17 PM Heh, I made a magstirrer from a PC fan, HDD magnet and a simple lm317 speed control 25-Aug-20 04:17 PM It was plenty usefull for a kid. 25-Aug-20 08:03 PM I have to make a product demo video for our company. Why is it I can make a dozen nonsense YouTube videos for myself no prob but one that people I work with are going to look at scares the hell out of me! Hahaha 25-Aug-20 11:14 PM @qualia after a while, now I think it's better to use a gimbal brushless motor with fine RPM control AND a hollow axle already built in to use as vacuum chuck. Less machining involved (if any) and those motors probably can reach 3krpm with no problems. 25-Aug-20 11:16 PM that does sound much nicer 25-Aug-20 11:17 PM yeah, I'll end up trying that once I get done (hah!) with the wirebonder 26-Aug-20 12:41 PM Ooof My FLIR camera is very sensitive but it gets super nonlinear at higher gain measuring for 100ms gets about 15x the signal of measuring for 33ms 26-Aug-20 12:46 PM which FLIR lets you control gain/gating like that? 26-Aug-20 12:52 PM Which... don't? 26-Aug-20 12:52 PM Any that can run with their Spinview software should be able to 26-Aug-20 12:55 PM so not my E5 :D 26-Aug-20 12:57 PM Looks like it has PC connectivity, so still probably. 27-Aug-20 08:30 AM @funranium any experience with superacids? Was not aware anything had a pH below -20.... 27-Aug-20 03:57 PM Nothing exotic. While I did run an HF distillery when my research involved dissolving rocks to get at the tasty Pb, Nd, and Sm nuclides that was about it. Fuming triply distilled HF or perchloric (when you absolutely hate organic matter) is more fun than I recommend for anyone. 27-Aug-20 04:01 PM There are apparently acids so strong 27-Aug-20 04:01 PM that HF is the only suitable solvent 27-Aug-20 04:04 PM I’m the weird physicist that did lots of bench chemistry in the earth science department. The rest of my cohort treated me like I was a mutant. 27-Aug-20 04:04 PM Perchloric? Ain't that what's used in those old chemistry demos where you use it to dissolve a rat (not a live one). 27-Aug-20 04:05 PM It’s one half of everyone’s favorite: piranha solution 27-Aug-20 04:10 PM Super acids are a thing yeah. That's how they used to do exotic cation chemistry before molecular beams 27-Aug-20 04:10 PM CH5+ kind of being the poster child of a species well suited for superacid studies 27-Aug-20 04:11 PM genuine question 27-Aug-20 04:11 PM if you had a huge amount of fluoroantimonic 27-Aug-20 04:11 PM and created a stream of it, like a faucet 27-Aug-20 04:11 PM what would happen to your hand if you opened it in the middle of your palm? 27-Aug-20 04:13 PM It wouldn't be oxidizing (I think) so it wouldn't be as bad as you think, but nothing good 27-Aug-20 04:13 PM Ignoring the HF that would kill you 27-Aug-20 04:13 PM But I'm pretty sure it'd be less impressive than piranha 27-Aug-20 04:13 PM Mostly speculation though 27-Aug-20 04:13 PM I don't have a good grasp of what your skin really is 27-Aug-20 04:15 PM Carbon 27-Aug-20 04:17 PM Well obviously 27-Aug-20 04:23 PM think like physicist not like chemist 27-Aug-20 04:23 PM if it has more than ten atoms I'm out 27-Aug-20 04:30 PM Okay. We'll Taylor expand around the carbon atom and then assume all higher order terms are negligible. So it turns into graphite 27-Aug-20 04:30 PM That physicist enough? 27-Aug-20 04:31 PM that is physics 27-Aug-20 04:35 PM Unrelated, but remind me to send you our zeeman papers when we finish them in like ~8ish months. They should end up being pretty relevant to your work. 27-Aug-20 04:35 PM Weird rotation related helium shenanigans going on we're pretty sure 27-Aug-20 04:36 PM zeeman + droplets 27-Aug-20 04:36 PM Yeah 27-Aug-20 04:36 PM that's across the hall ! 27-Aug-20 04:36 PM the cold head from the why-did-you-make-this setup is getting put to work in the chemistry group who has many zeemen 27-Aug-20 04:37 PM Well they're in for a trip because it's WEIRD 27-Aug-20 04:37 PM The OH data stumped Lemeshko 27-Aug-20 04:37 PM Or at least we assume it did because we never heard back 27-Aug-20 04:37 PM Assuming they have sufficiently sensitive light sources I guess 27-Aug-20 04:37 PM I can't remember if you need rotational resolution for the weirdness or not 27-Aug-20 04:40 PM You emailed him? 27-Aug-20 04:40 PM and he never responded? 27-Aug-20 04:41 PM Uh, not exactly 27-Aug-20 04:41 PM My boss sent him some data a couple years ago on this Zeeman effect anomaly that we think probably has something to do with angulons or something like angulons, and if the group has made any progress on it, we haven't heard about it 27-Aug-20 04:44 PM years ago hmm 27-Aug-20 04:44 PM Because if you want to contact him now 27-Aug-20 04:44 PM tagging him in a meme on instagram is a legitimate strategy 27-Aug-20 04:45 PM Slightly concerning 27-Aug-20 04:45 PM https://www.instagram.com/misha_lemeshko/ he has tenure now 27-Aug-20 04:53 PM This does not make it less slightly concerning 27-Aug-20 04:56 PM rock star scientist 27-Aug-20 08:56 PM Arrgggggg. I’m in building department plan check hell for the new place. 9 weeks in and they still have not even begun the evaluation process!!!! Living in California is all bout just learning to live with bureaucracy!! 27-Aug-20 10:28 PM it took nearly a year for the pre-approval site request thing for me 27-Aug-20 10:28 PM they noted my plans didnt show the manhole cover and whatnot 27-Aug-20 10:28 PM note: I wasnt changing the amount of space at all 27-Aug-20 10:28 PM about to restart on the house stuffs, once this exam is finito 27-Aug-20 10:28 PM PASV - Pre Application Site Visit 28-Aug-20 02:23 PM Practical test completed, 2 hrs early, hiked with doggo already 28-Aug-20 02:23 PM watch timed out okay, even w/ chronograph on 28-Aug-20 02:23 PM but one oiling spot missed could certainly be all it takes 28-Aug-20 02:23 PM anyways, the certification says jack-all about beeing able to make (nor engineer) a watch 28-Aug-20 03:32 PM Nice! 28-Aug-20 08:19 PM No doggo here, but have my almost 2.5 year old up to about 3.5 miles of hiking, including a little elevation gain and loss 29-Aug-20 12:22 PM These pictures are two miles apart. I am part of a prospectors club that has a claim in this burn area. It did not actually burn through the little canyon our claim is in, but truth be told I wish it had. It’s brushy as hell 29-Aug-20 12:22 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/image0-70D0C.jpg 29-Aug-20 12:22 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/image1-650E4.jpg 29-Aug-20 12:22 PM Got there and instantly got attacked by mosquitos. Even though I had two different types of repellent on I got bit several times. Got right back in the truck and left! 29-Aug-20 12:22 PM Ok this one is totally non vacuum related but meh... 29-Aug-20 12:25 PM it's not vacuum related, but you posted it in exactly the right channel 29-Aug-20 01:39 PM Monday should be the last 1hr for the written exam.. then I get to actually work on porjects (on the side, while working on the house) 29-Aug-20 01:39 PM super excited 29-Aug-20 01:39 PM I have a half desire to go to uni for (micro) engineering now because they didnt teach us anything related to that 29-Aug-20 01:39 PM so, more or less learning on my own 29-Aug-20 03:41 PM took apart a few steppers as I haven't been satisfied with the micro steppers (like in a cd rom drive) available on the market, and was curious on actual production assemblage and how 'easy' it may be to make my own.. I took a few photos but they match the few cutaways available online, but if anyone is interested, lmk 29-Aug-20 03:41 PM mostly I havent found too much info on # of steps/degrees in those small steppers 29-Aug-20 03:41 PM not that I need high resoltuion, but I hate lack of info 29-Aug-20 03:41 PM some of them do state about 18 deg/step, so 20 steps for full turn 29-Aug-20 03:41 PM but again, when the description says the screw pitch is _about_ 1.2mm 29-Aug-20 03:41 PM about .. really? 29-Aug-20 03:41 PM they are certainly ecoonomical price wise to buy and figure out more than making one myself, but was merely interested 29-Aug-20 03:41 PM (this would be for the 'moving scale' micrometer design, instead of a solenoid) 30-Aug-20 02:35 PM congrats! Not even two years 30-Aug-20 02:35 PM this $5.3k piece of equipment is now an expensive paperweight 30-Aug-20 02:35 PM time to RMA this thing lol 30-Aug-20 02:35 PM was going to do some measurement examples 30-Aug-20 02:35 PM ngl - I kinda wanna know what's inside 30-Aug-20 02:35 PM I do know for sure that at least on the digital electronics side of things 30-Aug-20 02:35 PM this runs Windows CE 30-Aug-20 04:33 PM I have an opposite problem right now. I need old technology. I need to transfer some old videos from VHS to digital but the two recorders I have from storage are now broken. Tried for hours to fix them but to far gone. Bought one on EBay but my guess is I will have to buy a few of them before I find one trustworthy enough to put family movies in. 30-Aug-20 11:31 PM Not a long time ago I needed to read some floppys with software for ancient RGA. It took us ~day of work (find a floppy drive in the building, find a computer with floppy bus, get a floppy read, find out that something is broken, have it read with ddrescue....) and wasn't really pleasant experience... 31-Aug-20 08:03 AM The ultimate version of this problem can be found on The Amp Hour podcast episode 169 where Vincent Himpe talks about needing to read old discs for a semiconductor litho tape out to make qualified parts for the military. Great listen if you have not heard it already. 31-Aug-20 12:04 PM @bkralik that's why I bought a USB floppy drive when I happened upon one once (unless that was a dream I had) 31-Aug-20 12:04 PM @nmz787 Yeah, we also ordered one after that experience... 31-Aug-20 12:31 PM School may be all finished! will hear results of the tests later this week 31-Aug-20 12:31 PM retake is next week 01-Sep-20 07:31 AM These were special discs only used for that purpose. They found the guy who had designed the disc system and had him come in to help. Too much money was on the line to leave it to chance. 01-Sep-20 10:23 PM mulch and fluff 01-Sep-20 10:23 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_4777-6AD08.JPG 02-Sep-20 12:53 PM I failed the practical due to a damaged click spring for the reverser (automatic gear train) .. retake tuesday/wednesday 02-Sep-20 12:53 PM it got damaged on assembly, and near the end there was signs of something being funky, but there was a laundry list of other things that were aggrevating and I shrugged at it, completly on me 02-Sep-20 02:43 PM Term 2 here is also online! 02-Sep-20 02:44 PM Meanwhile we had a ~380% increase in cases over the week and just got a "we can do better" tweet from the university president 02-Sep-20 02:45 PM our prez is named Santa 02-Sep-20 02:45 PM and has a PhD from McGill in experimental medicine 02-Sep-20 02:46 PM Ah. Ours got the job because he's really good at taking orders 02-Sep-20 02:48 PM wait 02-Sep-20 02:48 PM your state has 250k covid cases? 02-Sep-20 02:48 PM that's 02-Sep-20 02:48 PM double canada 02-Sep-20 02:48 PM georgia has more deaths than we have cases, and only double the population 02-Sep-20 02:48 PM I'm impressed 02-Sep-20 02:56 PM oof 02-Sep-20 02:57 PM We're number 1 baby 02-Sep-20 02:57 PM Its getting so much worse specifically here/other college towns too 02-Sep-20 02:57 PM It is actually a word that dyno won't let me say 02-Sep-20 02:59 PM my main impressions of Athens 02-Sep-20 02:59 PM come from meeting two people when I was in edinburgh for new years 02-Sep-20 03:00 PM ...i just realized your pfp is an optical centrifuge 02-Sep-20 03:00 PM they had graduated the year before and basically said UGA was just a big party schol 02-Sep-20 03:00 PM and 02-Sep-20 03:00 PM More or less what I gather 02-Sep-20 03:00 PM the most noteworthy thing 02-Sep-20 03:00 PM was that they booked a rental car 02-Sep-20 03:00 PM Pchem here is good 02-Sep-20 03:00 PM to tour edinburgh 02-Sep-20 03:00 PM Everything else is questionable 02-Sep-20 03:00 PM like how north american can you get 02-Sep-20 03:01 PM Proper physics department is pretty bad 02-Sep-20 03:01 PM besides thinking you need a rental car just to get around a big city 02-Sep-20 03:01 PM Yeah... 02-Sep-20 03:01 PM They thought it was hilarious that being so walkable/transitable hadn't even occured to them 02-Sep-20 03:01 PM good spirits. 02-Sep-20 03:01 PM I can confirm that the BS chem majors here ultimately learn nothing too 02-Sep-20 03:01 PM Its bad 02-Sep-20 03:02 PM One of them did mech eng I believe 02-Sep-20 03:02 PM Most of them wouldn't pass AP physics (high school) by the end of their degree 02-Sep-20 03:02 PM and actually ended up with a really cool job working for a company that makes software for vibration analysis 02-Sep-20 03:02 PM so they do a ton of calculations for Newport etc. 02-Sep-20 03:02 PM so it seems UGA did something right there. 02-Sep-20 03:02 PM UBC should be very proud of their Eng Phys program 02-Sep-20 03:04 PM I'd say it's a fine school over all. A lot of the sciences are relatively weak because GT is in the same university system 02-Sep-20 03:04 PM But there are bright spots 02-Sep-20 03:04 PM the people teaching it / doing the lab stuff... very good. 02-Sep-20 03:04 PM Like the average established professor h index in our department is still ~30 02-Sep-20 03:04 PM With a lot of relatively niche fields 02-Sep-20 03:04 PM Like gas phase spectroscopy 02-Sep-20 03:04 PM Not gonna lie, eng phys is a degree I don't understand 02-Sep-20 03:05 PM Rick Trebino is awesome. 02-Sep-20 03:05 PM I think GT wins over UGA for me just because of him. 02-Sep-20 03:05 PM Its like neither a physics degree or an engineering degree 02-Sep-20 03:05 PM GT definitely has more true giants, yeah 02-Sep-20 03:06 PM eng phys to me is more like "get really good at rapid prototyping" 02-Sep-20 03:06 PM Sometimes I do wonder if I should have done HHG work at OSU 02-Sep-20 03:06 PM Then I really would have been a physicist in a chemistry department :p 02-Sep-20 03:07 PM what was your undergrad in? 02-Sep-20 03:09 PM Chemistry 02-Sep-20 03:09 PM so you're all chemist then? 02-Sep-20 03:09 PM I've just gone to a couple of talks in that world, and what they do is definitely condensed matter physics 02-Sep-20 03:09 PM Yeah 02-Sep-20 03:09 PM "this server is all chemists?" "always has been" 02-Sep-20 03:10 PM Because they don't care so much about HHG itself more than we care droplets themselves 02-Sep-20 03:10 PM im a chem major too tho feelsgoodman 02-Sep-20 03:10 PM Rather they use HHG to do the attosecond stuff/surface sensitive stuff 02-Sep-20 03:10 PM my lab is in a chemistry building ? 02-Sep-20 03:10 PM I think realistically 02-Sep-20 03:10 PM it all comes down to "more money should be spent per undergrad" 02-Sep-20 03:12 PM can confirm am chem major and dont know anything 02-Sep-20 03:12 PM for real tho its hard to learn everything kinda have to specialize 02-Sep-20 03:12 PM small university? no money for fancy lab equipment big university? no money for sufficiently small classes / bad TA-student ratios 02-Sep-20 03:13 PM Yeah, I don't know if I'm glad or sad I went to a really small undergrad 02-Sep-20 03:13 PM I'm glad 02-Sep-20 03:13 PM On one hand I just straight up didn't have labs post ochem because lack of equipment 02-Sep-20 03:13 PM I just wish they had encouraged me more to seek research elsewhere during the summers 02-Sep-20 03:14 PM On the other hand my teachers wanted to teach 02-Sep-20 03:14 PM Yeah. 02-Sep-20 03:14 PM And my pchem 2 was really personalized to me because I was literally the only student 02-Sep-20 03:14 PM They're much less overworked 02-Sep-20 03:14 PM pchem 2 at my uni sucked 02-Sep-20 03:14 PM learned nothing 02-Sep-20 03:14 PM office hours meant "I guarantee I will be in my office ready to talk to" 02-Sep-20 03:14 PM but you could go find them any time and ask whatever 02-Sep-20 03:15 PM And I did luck into outside research for one summer, though I wish it would have been made more clear to me that I seriously need it for grad school 02-Sep-20 03:15 PM Yeah same. 02-Sep-20 03:15 PM I don't know, on one hand I probably learned more at the small school 02-Sep-20 03:15 PM yeah thats the thing people need to tell undergrads more imo 02-Sep-20 03:15 PM i got lucky this dude drilled it into me to join a lab 02-Sep-20 03:15 PM On the other Im pretty sure the only reason I'm not at a T10 is because my school was small 02-Sep-20 03:16 PM so i joined the summer b4 i started uni 02-Sep-20 03:16 PM Did you apply to any big schools lol? 02-Sep-20 03:17 PM A few. I had one failed sequence because none of my productivity actually beared results until after I graduated and I got the bad advice of "You have a 3.9 and an REU, you can get in anywhere" which made me mostly apply to big schools 02-Sep-20 03:17 PM But then again UGA was probably the lowest school I applied the second time around 02-Sep-20 03:17 PM And I ended up here so 02-Sep-20 03:18 PM idk exactly how grad school works but is it mainly based on ur gpa and GRE? 02-Sep-20 03:18 PM No 02-Sep-20 03:18 PM And yeah, people need to tell undergrads more that grad school apps are 95% research 02-Sep-20 03:18 PM source: friend with 99% average and 99th percentile GRE and didn't get into the big schools 02-Sep-20 03:19 PM hey same 02-Sep-20 03:19 PM interesting 02-Sep-20 03:19 PM Well, GRE wasnt that high I guess 02-Sep-20 03:19 PM so ig research is a big thing 02-Sep-20 03:19 PM But yeah, GT was my biggest accepted school 02-Sep-20 03:19 PM That friend also had three different summers of government-funded research with different PIs at bigger schools 02-Sep-20 03:19 PM just trying to compare it to the med school app process 02-Sep-20 03:19 PM like he did research at UofT 02-Sep-20 03:19 PM so there's definitely... a thing 02-Sep-20 03:19 PM IDK he ended up somewhere good the next round 02-Sep-20 03:20 PM Honestly I think the only way to get to those truly top schools is for your undergrad PI to know them 02-Sep-20 03:20 PM And for them to stick their neck out for you 02-Sep-20 03:20 PM Depending how November goes 02-Sep-20 03:20 PM I may consider the states for a postdoc 02-Sep-20 03:21 PM LORs might be a big thing for those schools 02-Sep-20 03:21 PM Spoilers, its basically the same as Canada 02-Sep-20 03:21 PM LOR? 02-Sep-20 03:21 PM Well, it has to be LORs from the right people 02-Sep-20 03:21 PM I know that my letters were stellar 02-Sep-20 03:21 PM oh references 02-Sep-20 03:21 PM Letter of Recommendation 02-Sep-20 03:21 PM Yeah. 02-Sep-20 03:23 PM Like I know they said that the department average is like a 3.1 and that my GPA wasn't inflated and that research wasn't a realistic thing there (we didn't get working fumehoods until my sophomore year) 02-Sep-20 03:23 PM But I'm pretty sure none of the big departments even read my file honestly 02-Sep-20 03:23 PM And to be more clear, in broad strokes grad school apps are GPA+GRE above minimum standards+letters+research 02-Sep-20 03:23 PM Nothing else matters 02-Sep-20 03:24 PM external funding tho 02-Sep-20 03:24 PM If you get an external scholarship prior to their decision 02-Sep-20 03:24 PM you almost always get in 02-Sep-20 03:27 PM Oh yeah true 02-Sep-20 03:27 PM IDK overall I think students at big universities 02-Sep-20 03:27 PM should make more of an effort to go elsewhere for the summer 02-Sep-20 03:27 PM And some of the top schools I'd only recommend going to if you have it even if you're accepted 02-Sep-20 03:27 PM Because they "accept" students they plan on kicking out 02-Sep-20 03:28 PM lmao 02-Sep-20 03:28 PM take your msc and LEAVE 02-Sep-20 03:28 PM You wish you got an MSc 02-Sep-20 03:28 PM After a year of TAing they say"Nobody has funding for you, so either get out or pay full tuition for a class work MS" 02-Sep-20 03:42 PM f 02-Sep-20 09:47 PM Intel will pay for any grad education 02-Sep-20 09:47 PM So I was talking to the dept about just casually taking classes and not having any research or teaching requirement, outside of research specifically for a thesis 02-Sep-20 09:47 PM (Intel pays as long as you get a C or better for undergrad credits, or B for grad) 02-Sep-20 09:49 PM Pay for.. grad education? 02-Sep-20 09:49 PM And the mechanical dept was like, oh yeah you can just take a bunch of grad level classes as a post-bac and they're cheaper too, but you may not get in as grads get preference 02-Sep-20 09:49 PM Yeah 02-Sep-20 09:50 PM I think people vastly underestimate 02-Sep-20 09:50 PM Butttt then my kid got more needy as he became a toddler, and without any family in this half of the country, and not sending him to daycare... That is on hold indefinitely 02-Sep-20 09:51 PM How much profs teaching grad level courses LOVE enthusiastic students 02-Sep-20 09:51 PM Oh, yeah I'm def enthusiastic... Like, I'm doing this stuff in my garage! 02-Sep-20 09:51 PM Unless you're saying as a TA you enjoy teaching, which yes I also have done in undergrad and enjoyed it a lot 02-Sep-20 09:51 PM But, Intel pays so much better than the stipend 02-Sep-20 09:53 PM The thing is 02-Sep-20 09:53 PM Any prof, if asked, would say yes 02-Sep-20 09:53 PM But they get 20-100 emails a day 02-Sep-20 09:53 PM So you can’t just bother them about that 02-Sep-20 09:54 PM I was very happy to treat my undergrad university as my personal consultancy firm :) 02-Sep-20 09:54 PM I took out loans for that! 02-Sep-20 09:55 PM f 02-Sep-20 09:55 PM The American dream. 02-Sep-20 09:55 PM It's crazy how much of a shoestring budget I used to have, and how little I desire going back to that even though I could 02-Sep-20 09:56 PM Lifestyle inflation is huge 02-Sep-20 09:56 PM First year of living with my partner we spent ~2/3 what we do now. 02-Sep-20 09:57 PM Back then I was like, I'll work for free or living wages if the project is super cool 02-Sep-20 09:57 PM And now it's like, hmm, idk 02-Sep-20 09:58 PM Mez and myself are still in that situation 02-Sep-20 10:00 PM Having a house makes things harder to be looser with for sure, even though it's been a great investment so far 02-Sep-20 10:20 PM https://arxiv.org/abs/2003.04777 Published in nature today 02-Sep-20 10:20 PM Very cool 03-Sep-20 07:59 AM ngl the whole "working for less than I made as a shift manager at Lowes" thing is getting old 03-Sep-20 08:37 AM Back then I was like, I'll work for free or living wages if the project is super cool Yeah, if my reactor job wasn't a student job I would not work for what I make regardless of how cool it is 03-Sep-20 01:04 PM I highly recommend having a significant other that makes more than you. It's pretty boss. The hard part then becomes convincing them that, yes, I do need to occupy another 20sqft of the house with $AWESOME_PROJECT_TOY. 03-Sep-20 01:39 PM it's such a bummer to be trying to claw my way out of tech and all the stuff that looks really Really interesting is 1. gated by ~academic credentials~ and 2. a 50 to 75% pay cut 03-Sep-20 01:39 PM i would stop whining about 1 if 2 weren't the case seemingly everywhere 03-Sep-20 01:41 PM what r u trying to get into 03-Sep-20 01:41 PM the missus & i have been trading off Who's Suffering In An Office To Keep The Lights On duties for the last 10 yrs when the other of us burns out 03-Sep-20 01:41 PM f 03-Sep-20 01:41 PM move somewhere cheaper? aren't you california 03-Sep-20 01:43 PM @charizardrekt i'd love to go into accelerator engineering or cold atomic physics or nuclear waste remediation research or something along those lines, i'm not 100% sure but these are the things i keep getting drawn to. nothing particularly concrete 03-Sep-20 01:44 PM accelerator engineering sounds epic 03-Sep-20 01:44 PM yeah i'm california. i put my two weeks in at my current job last Friday and there are talks about hoofin' it up to Seattle..ish. thereabouts 03-Sep-20 01:45 PM i mean so do the other ones too lol 03-Sep-20 01:45 PM tho im not exactly sure what cold atomic physics entails 03-Sep-20 01:45 PM ig its a large area 03-Sep-20 01:46 PM hey, free vacuum chamber for ya if you come a bit further north 03-Sep-20 01:46 PM brb time to run to vancouver barefoot 03-Sep-20 01:48 PM one of my 'plausibly accomplishable and legal to do in my garage' projects has been, for a while, to build an atom/ion trap capable of gathering up some specks and arranging them into a self-organized line of specks 03-Sep-20 01:48 PM measure their delightful jigglings, try some single-photon emission experiments, etc 03-Sep-20 01:48 PM i might actually be.. good? for vacuum chambers ?? i guess that depends on what you're offering ... 03-Sep-20 01:50 PM Cold atomic physics is working with a bazillion lasers to make things really cold 03-Sep-20 01:50 PM big stainless ASA cross: https://discord.com/channels/513115950501855256/513120957821485056/750877392008118332 03-Sep-20 01:50 PM with adapters on most sides. 03-Sep-20 01:50 PM *"probably ASA" 03-Sep-20 01:51 PM And does the nuclear remediation stuff actually require academic credentials? I know the career services sent us an email about that, and I kind of assume anything they send accepts anyone 03-Sep-20 01:51 PM @Mezmorizor you can get pretty cold with just one pretty cheap laser I believe 03-Sep-20 01:52 PM Though yeah, nothing pays anywhere near tech besides finance 03-Sep-20 01:52 PM hmm laser cooling is pretty cool 03-Sep-20 01:52 PM How cold is prefty cold? Like microKelvin? 03-Sep-20 01:52 PM Or can you get all the way to the nano range 03-Sep-20 01:53 PM oh weird ASA 03-Sep-20 01:53 PM i have a 6" 6-way CF cross, i'm good for huge unwieldly stainless chunks 03-Sep-20 01:53 PM this is much larger 03-Sep-20 01:53 PM for a MOT i kinda wish i'd gotten something like.. much smaller 03-Sep-20 01:54 PM Oh that was a non proliferation fellowship for grad students and recent graduates only 03-Sep-20 01:54 PM so yes academic credentials 03-Sep-20 01:54 PM yeah 03-Sep-20 01:54 PM ALL the trapping stuff the group here does is 2.75" or 1.33" 03-Sep-20 01:54 PM the only thing they have larger is their 4.5" turbopumps. Which have a reducer directly on them. 03-Sep-20 01:54 PM a 2.75" cube would be perfect ... 03-Sep-20 01:54 PM you know what's better than a cube? 03-Sep-20 01:55 PM A hypercube? 03-Sep-20 01:55 PM sphere? 03-Sep-20 01:55 PM kimball makes those weird round ball things that fit right on an optics table 03-Sep-20 01:55 PM those seem nice 03-Sep-20 01:56 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/image0-E338B.jpg 03-Sep-20 01:56 PM Octagon 03-Sep-20 01:56 PM there's a doppler limit to laser cooling iirc but it's in the mK range, i think? 03-Sep-20 01:56 PM OCTAGON 03-Sep-20 01:56 PM looking at the wikipedia page there are several methods to go below the doppler limit 03-Sep-20 01:56 PM probably super hard tho 03-Sep-20 01:56 PM also i dont know anything about how this works ¯\_(ツ)_/¯ 03-Sep-20 01:57 PM I’m sure mez has just as much junk around 03-Sep-20 01:57 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/video0-AA8BB.mov 03-Sep-20 01:57 PM going to vancouver and breaking into there 03-Sep-20 02:00 PM I think there are ways around the dipper limit, though yeah, naive laser cooling is based off the dipper effect and is doppler limited. 03-Sep-20 02:00 PM And I guess I can take some junk pictures 03-Sep-20 02:00 PM I should also say I don't do laser cooling so I could be wrong 03-Sep-20 02:00 PM I just no they do get to nanoKelvin routinely 03-Sep-20 02:00 PM And that the first step nowadays is buffer gas cooling 03-Sep-20 02:00 PM 10000 high voltage power supplies 03-Sep-20 02:00 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/20200903_170304-2551B.jpg 03-Sep-20 02:00 PM I think this is ToF stuff 03-Sep-20 02:00 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/20200903_170343-06ECB.jpg 03-Sep-20 02:00 PM Dunno 03-Sep-20 02:00 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/20200903_170145-9F123.jpg 03-Sep-20 02:00 PM Mostly quartz rods for our "furnace" 03-Sep-20 02:00 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/20200903_170233-F562D.jpg 03-Sep-20 02:00 PM And some old oscilloscope at the bottom 03-Sep-20 02:00 PM A bunch of other stuff too but I figured the big electronics stuff was most interesting 03-Sep-20 02:07 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/20200903_140113-2872B.jpg 03-Sep-20 02:07 PM this thing has been sitting here for months because depression. i really wanna slap it all together sooner rather than later 03-Sep-20 02:07 PM need to wind some huge helmholtz coils 03-Sep-20 02:07 PM that's an extra long 6" cross! 03-Sep-20 02:07 PM @Mezmorizor I love the pile of turbos 03-Sep-20 02:07 PM we have a bunch of turbos with no controllers and a bunch of controllers with no turbos 03-Sep-20 02:08 PM i think it was originally a sputtering chamber 03-Sep-20 02:09 PM When you let grad students design stuff 03-Sep-20 02:09 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/image0-8958C.jpg 03-Sep-20 02:09 PM You end up with nonmodular pieces that only work in one custom built chamber 03-Sep-20 02:10 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/20200903_140959-2088A.jpg 03-Sep-20 02:10 PM we all have TOF graveyards 03-Sep-20 02:10 PM this precarious ancient turbo desperately needs a flush and re-oiling 03-Sep-20 02:10 PM mmm pile of ext250s 03-Sep-20 02:15 PM his junk is sorted better 03-Sep-20 02:15 PM mine is just sorted by me 03-Sep-20 02:16 PM i like to hide residual gas analyzers around my room to stumble upon later & be pleasantly surprised by. a little treat for later 03-Sep-20 02:16 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/20200903_141441-AA713.jpg 03-Sep-20 02:17 PM Can never have too many turbos 03-Sep-20 02:17 PM Can confirm the non modular thing too 03-Sep-20 02:18 PM I made my 18-flange nightmare-sphere chamber 03-Sep-20 02:18 PM have standard flange distances for crosses of the same size 03-Sep-20 02:18 PM for top/bottom/back/front 03-Sep-20 02:18 PM and then everything else is just "idk, this seems fine" 03-Sep-20 02:19 PM I dont think I have anything that bad yet. Mostly just the mercury cell that only works with a KF40, but meh, could be worse 03-Sep-20 02:19 PM Actually 03-Sep-20 02:19 PM My failed mercury cell 03-Sep-20 02:19 PM Thats probably the worst 03-Sep-20 02:20 PM mercury cell? 03-Sep-20 02:20 PM Combo of lack of shop capabilities and me not noticing that I needed to focus the light for this 03-Sep-20 02:20 PM I just love how innocent this looks 03-Sep-20 02:20 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/image0-4756C.jpg 03-Sep-20 02:20 PM When you don’t know the nested nature inside 03-Sep-20 02:21 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/20200903_172118-0025B.jpg 03-Sep-20 02:21 PM Thats the mercury cell 03-Sep-20 02:21 PM Mercury in the middle, heat tape to get it in gas phase, and the rest is to keep the optics clean 03-Sep-20 02:21 PM why does it look the way that it does? 03-Sep-20 02:22 PM oh good heavens 03-Sep-20 02:22 PM It actually goes like that 03-Sep-20 02:22 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/20200903_172223-0390C.jpg 03-Sep-20 02:22 PM And it has the sides for cooling, copper pipe to actually water cool 03-Sep-20 02:22 PM One of the sides holds a UV fused silica window 03-Sep-20 02:22 PM The other couples to a bellow that couples to an MgF lens holder, and that holder couples to another bellow which couples to the chamber 03-Sep-20 02:22 PM The bellows important to direct the light 03-Sep-20 02:22 PM And the pipes at the other tube collect mercury that condensed in the water cooling region 03-Sep-20 02:22 PM Slightly terrified it won't actually work tbh 03-Sep-20 02:22 PM But on paper its sound 03-Sep-20 02:22 PM Biggest challenge is keeping the optics clean 03-Sep-20 02:22 PM Which is why its pretty long 03-Sep-20 02:27 PM does this thing operate under vacuum? how is the mercury excited? 03-Sep-20 02:27 PM i would be so worried about backstreaming 03-Sep-20 02:35 PM Its under rough vacuum, yeah. Just rotary vein pumped. We also have an LN2 foreline trap to hopefully catch any vapors that get pumped. Mercury is excited with heating tape. You dont want a ton of it, mercury itself absorbs the VUV Im making with it. Also why the interaction area is so small 03-Sep-20 02:35 PM And I kind of wanted to do Krypton for obvious reasons tbh 03-Sep-20 02:35 PM But the nonlinear suspectibility is like 2 orders of magnitude lower than mercury 03-Sep-20 02:35 PM So not super viable 03-Sep-20 02:53 PM Reminds me of this ambiguous VUV generator 03-Sep-20 02:53 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/image0-2406A.jpg 03-Sep-20 02:53 PM Also I like this. Beamsplitter in vacuum with two viewports epoxied in 03-Sep-20 02:53 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/image0-24F86.jpg 03-Sep-20 02:54 PM 'Ambiguous VUV Generator' industrial album title 03-Sep-20 03:58 PM Looks pretty similar yeah. 03-Sep-20 03:58 PM Though I'm not seeing where the conversion happens in that one. Does the light just get periscoped up in the middle where it's filled with (probably) xenon or krypton? 03-Sep-20 04:00 PM No clue! We have ancient cylinders of both of those 03-Sep-20 04:01 PM Nice 03-Sep-20 04:01 PM Anyway my design is pretty unashamedly almost identical to the one in the paper we stole the idea from 03-Sep-20 04:07 PM Wouldn't life be great 03-Sep-20 04:07 PM if you were allowed to just email them 03-Sep-20 04:07 PM and ask for their drawings 03-Sep-20 04:07 PM and just give your machine shop the working design? 03-Sep-20 04:15 PM Yeah... 03-Sep-20 04:15 PM Especially because in theory there's baffles that go in the watercooling section to make it less likely for atoms to hit the optics, but I couldn't figure out a way to make them in a way the machine shop understood 03-Sep-20 04:15 PM So I just made the diameter smaller instead 03-Sep-20 04:15 PM Don't think it's quite as good but oh well 03-Sep-20 04:19 PM are you just sketching stuff 03-Sep-20 04:19 PM or using CAD software? 03-Sep-20 04:19 PM CAD 03-Sep-20 04:19 PM They didn't know how to actually make them. My idea was like fire suppresion system inner baffle things 03-Sep-20 04:19 PM aka just a tube that you put in the other tube with baffles on the inside 03-Sep-20 04:19 PM The hardest part though was figuring out how to get the mercury to not pool into the cooling arms 03-Sep-20 04:19 PM And who knows if it actually even works 03-Sep-20 05:21 PM https://www.smbc-comics.com/comic/funding 03-Sep-20 11:37 PM @funranium I've got that covered here... But... As an acquaintance puts it I've got the Intel "golden handcuffs"... A salary that is sufficiently high and stable enough to make up for the work being less than amazing to me. 04-Sep-20 03:28 AM there's a doppler limit to laser cooling iirc but it's in the mK range, i think? @qualia yeah, depends like sub-mK, but for less you would need stuff like resolved sideband erc 04-Sep-20 03:28 AM etc 04-Sep-20 02:23 PM Please someone request this 04-Sep-20 02:23 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/image0-6E090.jpg 04-Sep-20 02:23 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/image1-24E1C.jpg 04-Sep-20 03:41 PM I would if I was in Vancouver lol 04-Sep-20 06:05 PM If it was the other Vancouver... 04-Sep-20 06:09 PM take the ferry to victoria and I'll bring it there lol 04-Sep-20 06:54 PM I am making a quick demo video for our products. I started to write down a few notes. I wound up with seven full pages worth! Hahaha 04-Sep-20 06:54 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_8672-00CA6.jpg 04-Sep-20 06:54 PM I tried just winging it which I can do in front of actual people but to the camera there were just too many Ummmms and such that notes were required. 04-Sep-20 07:17 PM There’s a reason many review youtubers have teleprompters! 05-Sep-20 02:49 AM I request this 05-Sep-20 12:18 PM Dang I forgot how much paperwork there is to sign for mortgages... Like 2 hours of signing paper after paper 05-Sep-20 12:18 PM Renting a place is comparatively a breeze 05-Sep-20 12:18 PM And that's on top of paperwork I already completed on my own for the application process 05-Sep-20 01:06 PM Renting a place is comparatively a breeze Unless you live somewhere like here where doing it online is basically a no-go 05-Sep-20 01:06 PM it's telephone tag 05-Sep-20 10:57 PM Well I was signing all this stuff with a mobile notary, sitting on my porch. I just forgot how long it all took. Literally non stop paperwork signing for 2 hours. Renting a place is like two or 3 forms from my experiences 06-Sep-20 11:34 AM <0xDBFB7#9254> hey vvv sorry to barge in like this, but does anyone know anyone in Canada with a Teensy board? 06-Sep-20 11:34 AM <0xDBFB7#9254> spare died in the middle of a goddamn test 06-Sep-20 11:34 AM <0xDBFB7#9254> oh my god it resurrected itself 06-Sep-20 11:34 AM <0xDBFB7#9254> oops sorry 06-Sep-20 11:34 AM <0xDBFB7#9254> heck yes 06-Sep-20 11:51 AM yay! 06-Sep-20 02:46 PM I just love doing this joke 06-Sep-20 02:46 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/unknown-9DFDB.png 06-Sep-20 02:59 PM it's a good joke 06-Sep-20 02:59 PM relevant, I asked a neighbouring lab if we could borrow their precision scale for weighing dyes for our laser 06-Sep-20 02:59 PM (specifically, asked if they had one we could use) "we have one, although maybe its time to find some drug dealer friends as they also all have them." 06-Sep-20 03:00 PM I also told people that I douse fish and chips with Methanecarboxylic acid 06-Sep-20 03:00 PM I just love how using various chemical names for everyday susbtances can make you sound like someone on drugs 06-Sep-20 03:00 PM or dealing with dubious chemicals 06-Sep-20 03:00 PM hmmmm 06-Sep-20 03:00 PM I should try this with my dad 06-Sep-20 03:00 PM I mean 06-Sep-20 03:00 PM he is the sort that laps up what others says 06-Sep-20 03:00 PM as long as it sounds convincing or seems to align with what he experienced 07-Sep-20 01:09 PM why does nobody want the ASA chamber? 07-Sep-20 01:09 PM I can't even find anything comparable for under $1000 07-Sep-20 01:15 PM ASA seems like it needs a machine shop to integrate into anything 07-Sep-20 01:16 PM yeah but four of six sides already have KF/CF adapters (well, one blank) 07-Sep-20 01:16 PM and the others really just need a plate of aluminum + a drill press, or even acrylic 07-Sep-20 01:16 PM Actually a hand drill would do too 07-Sep-20 01:16 PM a HUGE benefit of the way ASA is designed, is that if one flange accepts an O-ring 07-Sep-20 01:16 PM the other flange can just be a flat surface 07-Sep-20 01:16 PM so for this, you just need something flat + thick enough to not break under vacuum + around 10" OD + eight holes in sort of the right spots for the giant bolts 07-Sep-20 05:05 PM Because it’s too far away... 07-Sep-20 06:02 PM Wrong CA...if it was in California... 07-Sep-20 07:59 PM Yeah, I want it, but not enough for the all day driving trip. Though if I took my Jetta TDI it wouldn't actually cost much in fuel 07-Sep-20 07:59 PM Crazy winds here.... I packed to go emergency bags in case a fire breaks out (several in the area already) or a 120ft tree lands on my house 08-Sep-20 09:36 PM Found the amplifier for the backscatter for my second SEM that the one guy paid 300 bucks for the SEM to take just that off it because it was apparently worth at-least 300 bucks... https://www.ebay.com/itm/133506391559 70 dollars seems like a better price to me :P 09-Sep-20 07:42 AM @rdpierce Bombards! https://www.facebook.com/mccallumbagpipes/posts/4925788404101776 09-Sep-20 07:43 AM That’s seriously impressive. 09-Sep-20 07:43 AM Sorry, I’ve been absent lately, up to my eyeballs in circuit analysis and differential equations. 09-Sep-20 09:25 AM First Order transients - Sith circuit analysis 09-Sep-20 09:58 AM Found some old diazald whose container failed. Figured I might as well share and raise funranium's blood pressure a bit 09-Sep-20 09:58 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/20200909_121857-6E99D.jpg 09-Sep-20 10:30 AM Crusty 09-Sep-20 10:36 AM the machinist who does the vacuum welding is taking september off as he has accumulated too many vacation days 10-Sep-20 12:09 PM I just checked out the retired surface science lab for the first time, and it's like christmas 10-Sep-20 12:09 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/20200910_150930-8A52B.jpg 10-Sep-20 12:09 PM And bonus the most PhD student shielding ever 10-Sep-20 12:09 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/20200910_143445-E8FDB.jpg 10-Sep-20 12:09 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/20200910_151025-E6B6C.jpg 10-Sep-20 12:09 PM Not great pics but 10-Sep-20 12:09 PM Wow 10-Sep-20 12:09 PM Also a bunch of other electronics stuff I didn't take a pic of like ion gauge controllers, etc 10-Sep-20 12:17 PM I love the chamber behind this lol 10-Sep-20 12:17 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/unknown-5E6AE.png 10-Sep-20 12:17 PM I like the go-away-green on the cold head lol 10-Sep-20 12:17 PM And a reminder that nobody is unique 10-Sep-20 12:17 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/image0-F0B12.jpg 10-Sep-20 12:27 PM We are totally going to steal at least one cold head and all those cryopumps 10-Sep-20 12:27 PM We also might have found a compressor that we'll take if it is 10-Sep-20 12:27 PM The box looked like one, but it was covered in stuff so we didn't bother for now 10-Sep-20 12:29 PM lucky you getting to raid a post-CF lab 10-Sep-20 12:29 PM me n my ANSI 10-Sep-20 12:29 PM Does the ANSI chamber become more desirable if I find some gate valves or stuff for it ? 10-Sep-20 12:49 PM water bottles are precision parts mkay 10-Sep-20 02:26 PM before I got into anything related to vacuum science, one of the professors my boss was friends with retired... we raided his lab for some stuff but we didn't have much overlap in what our groups did so we didn't need much 10-Sep-20 02:26 PM He was like one of the top atomic spectroscopy + mass spec people in the country... so much CF, pumps, everything.. if only I had known 10-Sep-20 02:37 PM Oof 10-Sep-20 02:37 PM That will keep you up at night 10-Sep-20 02:45 PM Most of the valuable stuff isn't truly free reign sadly. We can transfer ownership to the lab and we definitely will take a lot because there's a lot of good stuff, but most of it is university property and admin wouldn't be chill with people taking it 10-Sep-20 02:45 PM Which is kind of a shame because I'm pretty sure the stuff that isn't gauges/cryopumps/controllers/gate valves will just be thrown away in the end 10-Sep-20 02:48 PM Oh yeah a lot of it I doubt I would've been able to take 10-Sep-20 02:48 PM but some stuff that wasn't explicitly labeled as uni property he may have been fine with me having (spare parts etc) 10-Sep-20 03:05 PM Same here, but I was given the ANSI chamber by another group as he was on his way to put it in metal recycling 10-Sep-20 03:05 PM that's why it's up for grabs 10-Sep-20 08:19 PM Ok, this is one of the few places I can tell this joke.... 10-Sep-20 08:19 PM I can’t believe the garbage they’re teaching us in EE. 10-Sep-20 08:19 PM So we covered First Order transient circuit analysis. That’s fine. No complaints there. 10-Sep-20 08:19 PM Well, I looked ahead to the next unit, and it’s all about AC phasors. 10-Sep-20 08:19 PM Can you believe it? 10-Sep-20 08:19 PM You can’t confuse your Star Wars and Star Trek like that! They’re blasters, not phasors!!! 10-Sep-20 08:30 PM That is a great joke 11-Sep-20 01:05 AM Is First Order something from Star Wars? 11-Sep-20 07:18 AM The new ones yeah. 11-Sep-20 08:28 AM Well I finally got convinced to buy an air particulate sensor... 11-Sep-20 09:31 AM speaking of air particulate 11-Sep-20 09:31 AM how do I weigh the odds 11-Sep-20 09:31 AM between biking in forest fire smog 11-Sep-20 09:31 AM or bussing in the covid ? 11-Sep-20 10:18 AM How long a ride and how crowded a bus 11-Sep-20 10:21 AM ~40 min vs ~45 min on the bus busses are ~6-20 people? 11-Sep-20 10:23 AM I think a more important concern is do you have any preexisting conditions for the bus ...or what kind of masks you have for the bike ride 11-Sep-20 10:23 AM Dang just checked and I am like 50 miles away from the nearest fire in California to me but my car is all covered in ash 11-Sep-20 10:26 AM Oh nah I'm fine, this is much more of "hey, I like going to work & if I can help reduce spread to others, I'll do it" 11-Sep-20 10:26 AM Being stuck at home for a few months was not fun 11-Sep-20 10:26 AM The smoke exposure on the bus is also not that different from biking. Just less excited lungs 11-Sep-20 10:29 AM Not sure how the smoke situation is in your area but if it is anything like California, even my mostly unaffected area, you probably do not want to be doing strenuous activity breathing the air without a proper N95 mask or something to get the ash 11-Sep-20 10:31 AM Oh it's much better than that 11-Sep-20 10:31 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/unknown-3D340.png 11-Sep-20 10:41 AM Oh man, you're loads better than here just west of Portland 11-Sep-20 10:41 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/image-20200911_094347-A7726.jpg 11-Sep-20 10:41 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20200911_092316-3F1CF.jpg 11-Sep-20 10:42 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/image0-D2FE4.jpg 11-Sep-20 10:42 AM East Portland 11-Sep-20 11:33 AM oof 11-Sep-20 11:33 AM can still see some blue sky here 11-Sep-20 11:33 AM just smells bad 11-Sep-20 02:48 PM https://www.ebay.ca/itm/VACUUM-FITTING-ZERO-LENGTH-REDUCER-STAINLESS-STEEL-FLANGE-8-TO-6-NEW/114164562724?hash=item1a94bcfb24:g:hmMAAOSwl8NVXMSK what am I looking at ?? 11-Sep-20 02:48 PM what on earth is going on with the inner knife edge? 11-Sep-20 02:48 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/s-l1600-9FF83.png 11-Sep-20 04:01 PM shot in the dark but a reentrant inner pipe + regular outer pipe, plus another one of these could make a cool solenoid 11-Sep-20 04:01 PM hey theres two of em >:3 11-Sep-20 04:47 PM I passed my certifcation exam.. school is complete! 11-Sep-20 04:47 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/DSC_1907-A134D.jpg 11-Sep-20 04:47 PM now... I gotta figure out the engineering (and if I need to go to school for that) 11-Sep-20 05:27 PM Nice! 11-Sep-20 05:27 PM With all the smoke, we're talking again about whether we should move back east 11-Sep-20 05:27 PM School has been in my thoughts again too recently 11-Sep-20 05:27 PM Back east near family would make raising the kid and school more feasible 11-Sep-20 08:52 PM Ah, of course I put the machinist's cutting oil in the corner of the garage on the floor next to the FTIR and drag pump station. 11-Sep-20 08:52 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20200911_205111-EC5EF.jpg 11-Sep-20 08:52 PM Was totally looking for that like 5 days ago when I needed some oil for a nail gun :/ 11-Sep-20 08:53 PM where abouts are you by the way? Beaverton? 11-Sep-20 08:53 PM Ended up using 2stroke engine oil (black stuff) 11-Sep-20 08:53 PM Hillsboro 11-Sep-20 08:53 PM Ah 11-Sep-20 08:53 PM I'm down in SE 11-Sep-20 08:54 PM You said you go to that undergrad with a nuke, right? 11-Sep-20 08:54 PM Right 11-Sep-20 08:54 PM Reed 11-Sep-20 08:54 PM Yeah 11-Sep-20 08:54 PM I couldn't remember, even though a mentor and employee prof in college went there too 11-Sep-20 08:55 PM Fair enough, it's kinda tiny 11-Sep-20 08:55 PM Well I remember my visit to the nuke lab! 11-Sep-20 08:55 PM That factoid about it being the only undergrad with nuke research was memorable 11-Sep-20 08:55 PM (idk if that's worldwide or just in the US) 11-Sep-20 08:55 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20200911_205659-F5AB2.jpg 11-Sep-20 08:57 PM I can't remember either 11-Sep-20 08:57 PM The amount of dust on this aluminum covering my SEM column is sad 11-Sep-20 08:57 PM is that just dust or is it ash 11-Sep-20 08:58 PM It's been sitting like this since I think last November 11-Sep-20 08:58 PM So likely just dust 11-Sep-20 08:58 PM The magic HN to N connector to go between my RF gen and the match network I have 11-Sep-20 08:58 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20200911_210047-71AC9.jpg 11-Sep-20 09:34 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20200911_210832-E33DA.jpg 11-Sep-20 09:34 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/image-20200911_211549-4C081.jpg 11-Sep-20 09:34 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20200425_180052-580FF.jpg 11-Sep-20 09:34 PM I am thinking above the RF gear in the server rack, I'll have a shelf with the membrane and drag stage pumps (drytel 30) then a iso100 bellows up to a iso flange I'll have to weld to the bottom of the little pipe on the right 11-Sep-20 09:34 PM Then a hoist at the top and cables or chains down to the RF match and source combo (the middle pic) 11-Sep-20 09:34 PM Or cut the pipe and add a front door so the main vertical section is fixed. 11-Sep-20 11:06 PM oh darn that's really cool 12-Sep-20 03:52 PM https://www.nature.com/articles/s41598-019-43716-3 12-Sep-20 07:34 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20200912_193411-83E4C.jpg 12-Sep-20 07:34 PM Thank you takeout container 12-Sep-20 07:34 PM The li-ion to USB converter was the perfect spare part, aside from the actual particle counter 12-Sep-20 07:46 PM nice :D 12-Sep-20 07:47 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20200912_194615-AAF16.jpg 12-Sep-20 07:48 PM dang you got a den 12-Sep-20 07:52 PM Haha, yeah, also the home office and workshop for non dirty stuff (except a little soldering once in a while). Bedroom has a HEPA filter running 12-Sep-20 08:08 PM Cool! 12-Sep-20 08:08 PM I assume this uses light for the detection of particulate matter? 12-Sep-20 08:22 PM Yeah, scattering 12-Sep-20 09:17 PM I’ve got one arriving Tuesday 12-Sep-20 09:17 PM Amphenol SM-UART-40L 12-Sep-20 09:17 PM Basically the same as yours probably 12-Sep-20 09:49 PM So the smoke did hit here today 12-Sep-20 09:49 PM Outside is pretty intolerable. 13-Sep-20 12:26 AM @Addison-110m oh cool, that looks like a marginally more legitimate part... And available on digikey for less than I paid a year and a half ago for mine 13-Sep-20 12:27 AM Yeah, it was cheap and I figured amphenol probably would put out a mostly reliable product 13-Sep-20 12:27 AM Newark.com has them for $23 13-Sep-20 12:27 AM Only downside is there’s not a huge amount of code for it. But it looks like there’s enough to work from 13-Sep-20 12:28 AM The datasheet looks pretty much the same in places as the pms5003 I'm using 13-Sep-20 12:28 AM I used "pms library" as the adafruit library was mostly failing, with only a few good readings 13-Sep-20 12:29 AM Oh, interesting 13-Sep-20 12:29 AM While the "pms library" is solid 13-Sep-20 12:29 AM (in arduino land) 13-Sep-20 12:30 AM I’ve got an arduino around for it somewhere. Just need to find it 13-Sep-20 12:30 AM Ughhhh, smoke is starting to really leak into my apartment 13-Sep-20 12:31 AM Hooking up the sensor was pretty informative 13-Sep-20 12:31 AM Luckily I setup a HEPA I had for labwork yesterday, in my bedroom... But the whole family was in the main part of the house for most of the day today (and all week prior) 13-Sep-20 12:31 AM When the sensor was working I made my wife and kid go in the bedroom and basically not come out 13-Sep-20 12:33 AM mm, water pipes made out of copper are okay for pinch-off use? (after proper cleaning) 13-Sep-20 12:33 AM Pinch-off vacuum use? 13-Sep-20 12:33 AM yep 13-Sep-20 12:33 AM what I want to know: they're pretty pure Cu, right? not very different to the stuff from a vacuum parts shop, just not pre cleaned? 13-Sep-20 12:33 AM or do they have different structures from different ways of manufacturing? or are they simply tested for leaks, and that's the crucial point - you would have 1% yield or less with copper tubes from the local hw store? 13-Sep-20 01:31 AM oh, and the cheapest (construction-wise) similar good sealing valve is made out of copper with a SS made valve seat, right? 13-Sep-20 01:31 AM but in principle I could make the valve out of SS and use a (BOM-wise) cheaper copper ring as the seat? 13-Sep-20 01:36 AM Hmm, I know a lot of vacuum mentions using OFHC copper 13-Sep-20 01:36 AM https://en.m.wikipedia.org/wiki/Oxygen-free_copper 13-Sep-20 01:36 AM @Addison-110m yeah the amphenol data protocol is exactly the same as the sensor I'm using... I think I'm going to order two of those now 13-Sep-20 01:43 AM ah 13-Sep-20 01:43 AM it seems it's the same as "medical copper pipes" 13-Sep-20 01:43 AM ok TIL 13-Sep-20 01:43 AM normal HW store tubes would have ruined everything lel 13-Sep-20 02:29 AM hmm 13-Sep-20 01:27 PM I just bid on a dualbeam FIB/SEM 13-Sep-20 02:07 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/unknown-38A63.png 13-Sep-20 02:12 PM Does the State of California contain itself though 13-Sep-20 02:14 PM will I need to put such warnings on my watches, hrmm 13-Sep-20 02:21 PM The State of California wants to make sure you have safe sex with objects in this state. 13-Sep-20 02:23 PM oh myyy 13-Sep-20 02:26 PM lead solder is going to be a reason I would have to list my watches as non-RoHS 13-Sep-20 02:57 PM someday when you cross the border into california there will be a sign saying "The State of California contains one or more chemicals known to the State of California to cause cancer..." 13-Sep-20 02:57 PM it got lost and ended up on your sticker instead of the billboard 13-Sep-20 04:07 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/QKP7-VZ17jyPfc4oqETfrwDUQykOO1WSZlHa71fNGK-10631.png 13-Sep-20 04:07 PM the state comes by sometimes and slaps signs on toxic buildings 13-Sep-20 06:24 PM At least that one is somewhat specific. Most buildings in CA are posted due to their asbestos content in walls, sidings, of floor. 13-Sep-20 08:05 PM @qualia new emote? 13-Sep-20 08:05 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/oscilloscope_wave_border-68134.png 13-Sep-20 08:05 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/oscilloscope_wave-7D932.png 13-Sep-20 08:05 PM IDK if better with or without border 13-Sep-20 08:05 PM looks fine 64x64 13-Sep-20 08:05 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/oscilloscope_wave_border_copy-27C68.png 13-Sep-20 08:05 PM or even 16x16 13-Sep-20 08:05 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/oscilloscope_wave_border_copy-9FCE0.png 13-Sep-20 08:16 PM :wavy: 14-Sep-20 12:22 AM While I don't see an use case for them I enjoy that this server has so many colorful emojis 14-Sep-20 12:22 AM 14-Sep-20 12:22 AM we need more blue! 14-Sep-20 12:22 AM cherenkov blue 14-Sep-20 01:29 AM Someone can use this if they want for an emoji 14-Sep-20 01:29 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/16000721360125599735431437726397-F8663.jpg 14-Sep-20 01:29 AM I took it at Reed Reactor 14-Sep-20 08:18 AM I second this emoji so so strongly 14-Sep-20 08:20 AM if anyone has a better name just say so :D 14-Sep-20 08:28 AM What exactly is that? 14-Sep-20 08:29 AM Cherenkov radiation off a nuclear reactor core 14-Sep-20 08:32 AM Hmm so is it interchangeable with this boi 14-Sep-20 10:26 AM It's not specifically waste I guess, but whenever stuff like this comes up I'm always reminded of Kerr McGee's Cimarron Fuel Fabrication site which was just one giant yikes top to bottom 14-Sep-20 10:57 AM Hoooooooboy. Yes. 14-Sep-20 11:07 AM I've always wondered what happened at their OKC plant too. I remember a little bit after they went bankrupt there were just A LOT of monitoring wells set up basically overnight 14-Sep-20 11:07 AM Not sure what they actually did on that plant. 14-Sep-20 11:14 AM Not much other than board the place up and install groundwater monitoring wells. The string of sales and bankruptcies in the wake of Silkwood's death means that, like so many other places, will only get cleaned up as a Superfund site. As the Superfund's funding is iffy, I wouldn't expect the clean up to happen in my lifetime. 14-Sep-20 11:16 AM I worded that poorly. I meant what that plant even did for Kerr McGee 14-Sep-20 11:16 AM Besides obviously having similarly terrible QA/QC 14-Sep-20 11:18 AM I think the answer to that question gets to be left at the appropriately vague "stuff" when you start playing with plutonium extraction and fuel refabrication. 14-Sep-20 12:00 PM Ok, sooo 14-Sep-20 12:00 PM how does one prepare sperm samples for an SEM? 14-Sep-20 12:00 PM like what makes them keep their shape under vacuum 14-Sep-20 12:00 PM asking for a friend 14-Sep-20 12:06 PM I tried with my FIB once or twice 14-Sep-20 12:06 PM I let them sit for a while to liquify 14-Sep-20 12:06 PM Then centrifuged and rinsed and recentrifuged 14-Sep-20 12:06 PM I think I used saline to rinse 14-Sep-20 12:07 PM let the whole sample sit as it you get it? 14-Sep-20 12:07 PM and then a last wash in water and let it dry? 14-Sep-20 12:10 PM https://coefs.uncc.edu/hzhang3/files/2011/05/SEM-sample-preparation-instructions.pdf 14-Sep-20 12:10 PM Oh you said sperm specifically 14-Sep-20 12:11 PM That's what I did... I still had a lot of "matrix" left that the sperm were embedded in 14-Sep-20 12:11 PM https://bitesizebio.com/34150/sample-preparation-scanning-electron-microscopy/ 14-Sep-20 12:11 PM That's for biologics 14-Sep-20 12:12 PM @Mezmorizor unfortunately it leaves a lot to be desired for semen prep 14-Sep-20 12:13 PM hmm interesting 14-Sep-20 12:19 PM I didn't even coat the sample I tried with anything conductive 14-Sep-20 12:19 PM But FIB is a little more forgiving re charging 14-Sep-20 12:19 PM And I placed the sample directly on carbon tape to dry 14-Sep-20 12:19 PM It appeared that they might have actually wriggled into the holes of the carbon tape as they dried 14-Sep-20 12:25 PM last wiggle of death 15-Sep-20 02:29 AM I have a an old book about EMs and sample prep 15-Sep-20 02:29 AM all the John J. Bozzola EM books are good references for bio prep, right? 15-Sep-20 02:29 AM Electron Microscopy and Electron Microscopy: Methods and Protocols 15-Sep-20 02:29 AM both are on lib-gen 15-Sep-20 02:29 AM libgen 15-Sep-20 02:05 PM Has anyone tried to cook something as byproduct of baking? I present you Tokamak-cooked beef stew (goulash)! 15-Sep-20 02:05 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/01-88166.jpg 15-Sep-20 02:05 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/02-440E2.jpg 15-Sep-20 02:05 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/03-3BFBD.jpg 15-Sep-20 02:12 PM Nice! 15-Sep-20 02:23 PM All is fun and games until you spill goulash on your instrument 15-Sep-20 02:24 PM haha, very nice 15-Sep-20 02:26 PM Unfortunately our tokamak is quite messy (layer of hydraulic oil everywhere outside vessel, we have hydraulic preload system...), so minor spill wouldn't be much issue... 15-Sep-20 02:27 PM that's so damn cool 15-Sep-20 02:28 PM Cool maybe, practical not. You need to sync oil pressure in hydraulics with magnetic field in coils and when you do it wrong, something horribly breaks 15-Sep-20 02:30 PM I was more talking about tokamak baking in general ^^ 15-Sep-20 02:30 PM Ah, ok 15-Sep-20 02:30 PM First idea was to bake some cake or pastry, however even though we bake vessel core to 150 degC, ports are heated only up to 100 degC (because windows, shutter, etc) and that is not sufficient. So I decided to go for "slow cooked" goulash instead. 15-Sep-20 02:38 PM next time sous vide steak 15-Sep-20 02:38 PM plasma roast to finish it 15-Sep-20 02:39 PM Currently we are designing new machine, which should be able to heat up to 500 degC, so low temperature will not be an issue 15-Sep-20 02:54 PM mmm, nice monolayer sear :D 15-Sep-20 02:54 PM oh, so the hydraulics are there to counteract the stresses from the running magnets? i was actually curious -- does pressure/strain spike noticeably during turbulence/reconnection? 15-Sep-20 02:54 PM how do you heat your plasma? 15-Sep-20 03:01 PM Yes, hydraulics counteract the stresses from the running magnets, but mainly the stresses which are caused by interaction between those magnets themselves, not coming from plasma. And yes, during disruption (when plasma suddenly "disappears") some stress spike may be seen, but as we have small machine and we don't run it at maximal parameters, we don't care about those. 15-Sep-20 03:01 PM As additional heating (beside the "natural" ohmic heating), we have two neutral particle injectors (each capable of delivering 400 kW of deuterium accelerated to 40 kV for ~250 ms) 15-Sep-20 03:02 PM makes sense! 15-Sep-20 03:02 PM coooool 15-Sep-20 03:04 PM Now we are being delivered new one, capable of 1 MW, acceleration voltage 80 kV and time 1 second 15-Sep-20 03:04 PM And yes, it is cool, but also bit scary - with the old one, we managed to shoot through closed gate valve because of interlock failure 15-Sep-20 03:06 PM mm spicy 15-Sep-20 06:22 PM neat neat 15-Sep-20 07:28 PM @nmz787 15-Sep-20 07:28 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/image0-8B54E.png 15-Sep-20 07:28 PM Gave me the nice surprise of the room I thought was the best in my apartment is apparently the worst. 15-Sep-20 07:32 PM Maybe the signal is invented 15-Sep-20 07:34 PM It’s probably just the result of filter placement for most of the day plus the soldering to get it all set up 15-Sep-20 10:26 PM @Addison-110m nice! Yeah I ended up taping up some leaky doors and a sliding glass patio door last night 15-Sep-20 10:26 PM The main rooms of my house now are much better, but still unhealthy. Going to run the one HEPA out here tonight, until we need it again tomorrow for work. 15-Sep-20 10:26 PM Now I know the value of replacing a 30 year old sliding glass door that otherwise seems fine glass and glazing wise 15-Sep-20 10:28 PM Yeah, I’ve retreated to my room where the filter is keeping it pretty clean. I wish I could tape up my front door but it’s the only one I can lock from the outside 15-Sep-20 10:29 PM Yeah I've got a side door through another doored room... That's usually my office but it's the new intermediary room 15-Sep-20 10:29 PM The "hot" zone 15-Sep-20 10:29 PM I put a towel at the bottom of the door to that room 15-Sep-20 10:31 PM Yeah, I’ve done that for one room. But tomorrow I’m probably just going to put the filter in the living room until the air quality of my room climbs too high 15-Sep-20 10:36 PM this feels eerily like some sci-fi movie, and since I have a kid, sort of like M Night Shyamalan's "The Village" movie... mixed with a zombie virus apocalypse movie. Or maybe "The Road". 15-Sep-20 10:36 PM like, what if there wasn't a global virus pandemic, what if the air outside the house and outside the bedroom /wasn't/ toxic or harmful. 15-Sep-20 10:36 PM (i.e. what we tell our son) 16-Sep-20 12:06 AM I've been told our bad air here is smoke from Ca that has now circled half of the globe 16-Sep-20 12:06 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20200915_184746-A0400.jpg 16-Sep-20 12:06 AM Now even we know that it's a boy 16-Sep-20 12:48 AM "bad air" 16-Sep-20 12:48 AM bavarian blue 16-Sep-20 12:50 AM Now even we know that it's a boy @GigaSquirrel what's with this whole thing? 16-Sep-20 12:50 AM I'm seeing this on numerous places now 16-Sep-20 12:51 AM bavarian blue @N00N with californian grey just on the horizon 16-Sep-20 12:51 AM @GigaSquirrel what's with this whole thing? @SleepyOwl Joyce apparently part of the fire has been started by fireworks on a gender reveal party 16-Sep-20 12:51 AM yeah, but compared international standards 16-Sep-20 12:51 AM to 16-Sep-20 12:52 AM lol 16-Sep-20 12:52 AM yeah, but compared international standards @N00N well yeah, but that doesn't make me like it :P 16-Sep-20 12:52 AM you could sell that as "pretty good air" to china 16-Sep-20 12:55 AM apparently part of the fire has been started by fireworks on a gender reveal party when do we start using nukes for this? 16-Sep-20 12:55 AM sex of child signalled by tonnage of bomb 16-Sep-20 12:55 AM and thus the size of the explosion 16-Sep-20 12:57 AM I like how you're thinking 16-Sep-20 12:59 AM yeah - a small well designed hydrogen bomb would have a lesser impact on the climate 16-Sep-20 12:59 AM only a chilling effect from the dust 16-Sep-20 01:09 AM though to be fair 16-Sep-20 01:09 AM climate change is making it easier to ignite a large area of forest 16-Sep-20 01:16 AM as do Fireworks in a fire hazard area 16-Sep-20 01:20 AM yeah - although increasingly its getting easier to set huge swaths of forest on fire 16-Sep-20 01:20 AM just by a spark or ignition of sorts 16-Sep-20 01:22 AM Yep 16-Sep-20 07:29 AM I have property in the burn area of the creek fire and live only a few miles outside of it. We have known this fire was gonna happen sooner or later for decades. Don’t blame all of it on climate change. This is mostly due to bad policies and forest management in our particular case. The Indians used to burn these places out every year to allow them to travel and hunt, then commercial logging took over and cleared out brush during logging operations, built and maintained roads and fire breaks, and were very proactive in putting out uncontrolled fires. Logging was stopped for questionable reasons 25 years ago and it has done nothing but become a brushy hell. It was gonna burn no matter what. Pre climate change as a kid in the 80’s I saw a demonstration where a pail of dirt from up there, which is actually mostly mulch had a smoldering cigarette thrown in it, and we came back an hour later and the entire pail had smoldered through. It was just that flammable. There are billions of cubic yards of that out there. 16-Sep-20 07:34 AM God the logging practices over the past hundred years in north america... SMH 16-Sep-20 07:34 AM They're still constantly trying to cut old growth here. 16-Sep-20 09:25 AM I wish people would stop focusing on the gender reveal thing. That was one of like 50 fires. Blaming them for being dumb with a smoke bomb just ignores the real issues. 16-Sep-20 09:29 AM anything to shift the blame to individuals / consumers, always 16-Sep-20 09:29 AM like coca cola and littering, or water reduction, or carbon footprint.. 16-Sep-20 09:33 AM Of course 16-Sep-20 09:33 AM God forbid we hold someone who matters accountable 16-Sep-20 09:33 AM Though it works sadly. It worked on me until a friend in Oregon told me that the fire they were scared of having to evacuate for was completely separate from the gender reveal fire. 16-Sep-20 09:35 AM it's just entropy having some fun 16-Sep-20 11:40 AM Logging is actually one of the only ways humans have of direct carbon sequestration. True it only puts it off for a hundred years or so until the house gets town down and disposed of, but those are going to be a pretty important hundred years or so coming up. A fallen tree on the forest floor releases most of its carbon in 10 years. A piece of lumber in a house lasts about 100. 16-Sep-20 11:48 AM Trees are logged at greater than 10x the rate they fall naturally though... 16-Sep-20 11:48 AM and it's not like they're going out and only cutting the ones that are predicted to fall 16-Sep-20 03:24 PM California has almost no forestry infrastructure left anymore because of all the environmental activism surrounding removing large trees and we really have no other infrastructure that could hope to deal with the decades of fuel buildup in a lot of places 16-Sep-20 03:24 PM I read an interesting thing that in a lot of the northern/central California forests there were around 40-70 trees per acre in the 1850s but there are over 400 trees per acre in some areas today 16-Sep-20 03:24 PM Seems crazy that could be possible 16-Sep-20 03:27 PM Wouldn’t surprise me in the least, agressive fire suppression and with no other source of thinning as well as having younger trees sounds sounds sensible 16-Sep-20 03:27 PM Ive spent a lot of time down in northern New Mexico and while it’s a fairly different environment, the difference between a healthy ponderosa forest there and an unhealthy one is staggering. You don’t need hiking trails in a healthy forest, it’s just so clear down low to the ground that you can go basically wherever you want 16-Sep-20 03:30 PM Most of the activism is regarding the removal of trees that were here well before 1850... 16-Sep-20 03:30 PM @Charles I highly doubt the amount of carbon sequestered by trees is going to be even close to enough to make a difference in the next few decades 16-Sep-20 03:30 PM But it’s something 16-Sep-20 03:31 PM is it though? 16-Sep-20 03:31 PM Is letting it burn any better? 16-Sep-20 03:31 PM trying to put a bandaid on a gaping wound 16-Sep-20 03:31 PM depends on the situation 16-Sep-20 03:31 PM many of the trees that need clearing aren't necessarily good lumber 16-Sep-20 03:31 PM the trees that lumber companies will clear and harvest, aren't the ones causing issues 16-Sep-20 03:32 PM @idmb I am not sure if that is true or not but it makes any sort of logging/forest maintenance totally financially impossible from what the article I read suggested when the haulage costs are factored in (so few sawmills) 16-Sep-20 03:32 PM a forest of wood destroyed by pine bark beetles is not going to be logged typically 16-Sep-20 03:33 PM https://digitalcommons.calpoly.edu/cgi/viewcontent.cgi?article=1023&context=nrm_fac 16-Sep-20 03:33 PM I think this problem predates (but is made much worse by) the beetle issue but that is just my understanding of it. 16-Sep-20 03:35 PM @LRM all the activism here is in regards to old growth, which is defined here as 250 years or older 16-Sep-20 03:36 PM careful selective logging could definitely help 16-Sep-20 03:36 PM the ecological effects of the monoculture tree-planting by forestry companies has hugely negative effects on biodiversity 16-Sep-20 03:37 PM @GigaSquirrel after being in charge of a SEM at a makerspace, you get used to guys asking if you could, ahem, image a sample..... 16-Sep-20 03:38 PM the financial cost of which is not something you're gonna see laid out clearly, because ecology is extremely complex. It's not as simple as the counterargument of "these trees cost too many man-hours to cut down and collect to be worth it" 16-Sep-20 03:38 PM I do not think that is the case with the anti-logging activism in California that I have seen but I really do not follow it more than a few of my acquaintances being involved in it a little bit. I definitely do not support the monoculture tree replanting but that is easily fixed through policy mandates? 16-Sep-20 03:39 PM I've literally never encountered someone saying they were opposed to a forestry company running a lot of land like a farm for trees 16-Sep-20 03:39 PM Im like... did you hear the part where I talked about high vacuum and off gassing??? Guys thought they could just make a deposit on a sample stub, put it in the chamber, and see their little swimmers. 16-Sep-20 03:39 PM I did look into SEM sample prep for biological samples, and from what I’ve heard, they are typically fixed in something like glutaraldehyde or paraformaldehyde. 16-Sep-20 03:39 PM Next comes critical point drying. 16-Sep-20 03:39 PM Replace water with a solvent that’s miscible with CO2, like ethanol or isopropanol. 16-Sep-20 03:39 PM Then swapping that with CO2 in liquid state, going through superfluid to gas. 16-Sep-20 03:39 PM Then I imagine you’d probably want to sputter coat them. 16-Sep-20 03:39 PM I’ve also heard of uranyl acetate and/or osmium tetroxide for bio sample prep. Those just sound... evil. Liquid uranium? A heavy metal with a low vapor pressure? Ouch. 16-Sep-20 03:45 PM Running a lot of land like a farm for trees and harvesting a few larger trees to make clearing large areas financially viable are totally different subjects... The activism I have seen most recently is mostly related to road building, using heavy machinery to do the clearing/thinning because of the damage to soil surfaces/increased erosion, and large brush piles being left behind which are both real issues that only exist due to other restrictions on the operations (again this is just my understanding of the situation here). If the companies could come in and build roads for access (big point of contention) do their work and haul out some large trees + the brush and make some money we might make some headway on the vast areas that need work done. The legal costs + environmental laws + lack of forestry infrastructure all make it financially impossible at the moment and there is no sign it will change 16-Sep-20 03:49 PM I own a critical point dryer, but I’ve never used it with a sample. The problem was that I hit the eBay “Buy” button before realizing that bio samples need critical point drying AND nasty chemical fixation. I looked into getting a fume hood for the makerspace, but that never panned out. Also, I needed a source for pure anhydrous solvents. And once you open a solvent bottle, it will start to get contaminated with moisture from the air. 16-Sep-20 03:51 PM Molecular sieves get things pretty dry without a ton of effort. Though the other things are obviously problematic. 16-Sep-20 03:55 PM Insects can be desiccated, sputtered, and imaged. They’ve got an exoskeleton not damaged by desiccation. 16-Sep-20 03:55 PM And @SleepyOwl Joyce that nuclear gender reveal sounds intriguing. Doesn’t cobalt burn blue? What if you detonated an a-bomb with a whole bunch of cobalt if it’s a boy? 16-Sep-20 03:59 PM oh noes 16-Sep-20 05:35 PM can't wait for my new MCP 16-Sep-20 05:35 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/unknown-361BE.png 16-Sep-20 05:35 PM holy mother of holes 16-Sep-20 06:22 PM @rdpierce you don't need to fix samples, I've imaged several cells without critical point drying, and sperm after just a few washes in saline and dropping onto carbon tape. The images weren't phenomenal and my vacuum never got to "great" levels... But I basically just shoved them in the chamber and turned on the beam 16-Sep-20 06:22 PM With some mushroom spores, I literally had the machine already running, got some carbon tape and touched it to the top of a mushroom cap that had spores from a higher mushroom... Threw that tape onto my sample plate, put it through the load lock, and was imagining the spores and etching them (this is in FIB) within about 10 minutes of touching the tape to the cap in my yard 16-Sep-20 06:25 PM Interesting.... 16-Sep-20 06:25 PM https://m.imgur.com/gallery/YQwPaMe 16-Sep-20 06:25 PM Thats a link with a buncha pics 16-Sep-20 06:25 PM Bio isn’t my strong suit. I’m just going off the research I did. 16-Sep-20 06:26 PM Glutaraldehyde is mostly to prevent them from rotting away 16-Sep-20 06:26 PM And to preserve internal structure 16-Sep-20 06:26 PM For doing things like microtome sectioning 16-Sep-20 06:26 PM But that's pretty much superceded today with cryo techniques 16-Sep-20 06:26 PM At least in the e-beam/FIB space 16-Sep-20 06:26 PM Throw your cells on a cryo stage, load into your dual beam, image with SEM, cut a layer with FIB....rinse and repeat to get an image stack, post process into a 3D model 16-Sep-20 06:26 PM On fire topic, I just read this https://threadreaderapp.com/thread/1306359385656946688.html 16-Sep-20 06:26 PM I've definitely heard that controlled burns are usually squashed by rich people who don't want to smell smoke 16-Sep-20 07:59 PM Which is really stupid because they're one of, if not the most important parts of wildfire control 17-Sep-20 05:08 AM glutaraldehyde/paraformaldehyde aren't so bad anyhow at least when I was in the lab, normally worked with pretty mild dilutions as a fixative too (4-5% iirc). There are alternative fixatives depending on what you're doing, cold methanol was a common alternative. Dunno how that affects TEM/SEM but if it's just there as a fixative before sectioning and the like it should work. Methanol will give you a different internal view though (it dehydrates and preciptates everything in place, whereas PFA crosslinks the jeezus out of everything) 17-Sep-20 09:14 AM https://youtu.be/LJUNQckxLP0 17-Sep-20 06:40 PM ignobel prizes awarded today 17-Sep-20 06:40 PM this was the material science one: https://www.sciencedirect.com/science/article/pii/S2352409X19305371?via%3Dihub 17-Sep-20 09:16 PM not sure why I am reading this paper but I have some serious concerns about their methods for a lot of reasons 17-Sep-20 09:16 PM ...they sharpened their "knives" with a file but ice materials seem like you should probably approach that similar to flint knapping? 17-Sep-20 09:16 PM also was it really necessary to "hand shape" them at all hahahaha 18-Sep-20 03:57 AM RE: controlled burns and forest management 18-Sep-20 03:57 AM https://qz.com/1904925/the-untapped-value-of-native-american-fire-management-techniques/ 18-Sep-20 06:01 AM imagine being the poor grad student tasked with determining if frozen fecal knives work 18-Sep-20 06:12 AM https://youtu.be/yiJ9fy1qSFI 18-Sep-20 04:44 PM IT'S SAFE OUTSIDE!!!! 18-Sep-20 04:59 PM "safe" 18-Sep-20 05:03 PM Pm 1 is 1, pm2.5 is 2, pm10 is 3 18-Sep-20 05:03 PM Here anyway 18-Sep-20 05:03 PM Cleaner outside than inside at the moment 18-Sep-20 06:45 PM that rain was much needed 18-Sep-20 06:45 PM was able to open up the windows, which helped since I have lasagna in the oven (which is heating up the place) 19-Sep-20 09:53 AM It's like going on a vacation, I get to see so much (ash) of california here! 19-Sep-20 09:53 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20200919_184959-30E48.jpg 19-Sep-20 04:33 PM https://youtu.be/So-6lgmVhA0 lol 19-Sep-20 04:44 PM Yeah not a very good design. Yeah it will probably function but it’s an example of bad engineering practices. Well covered in the comments of the video. Now what would have been cool was if somehow he had done some kind of vapor deposit controlled impedance material and laser trimmed and balanced that to balance the currents in the fets. That would be cool. 19-Sep-20 04:52 PM Amazing how many of the comments think it's meant to be useful rather than funny? 19-Sep-20 04:52 PM https://youtu.be/4twwwOlj7HE what a weird channel 19-Sep-20 05:20 PM looking into "zero-length springs" 19-Sep-20 07:30 PM american tech is a known garbage channel 19-Sep-20 08:08 PM It’s on the internet so it must be true? Hahaha 20-Sep-20 01:12 AM Oh speaking of FLIR: https://www.ebay.com/itm/FLIR-Systems-MWIR-Camera-Janos-40494-0517-ASIO-25mm-F-2-3-Lens/293741289876 20-Sep-20 01:12 AM So tempting... High frame rate MWIR thermography 20-Sep-20 01:12 AM But I just know this thing will become a paperweight without the read-out electronics 20-Sep-20 01:12 AM And the frame grabber card 20-Sep-20 01:12 AM Fairly sure this camera has 640*512 thermal resolution, indium antimonite microbolometer, Stirling cooled detector, 100 fps in full frame, 22 kfps when limited to 4 by 128 pixels 20-Sep-20 01:12 AM Except for the antiquated read-out electronics, software options (the ADCs are actually in a separate box I think) and the slightly worse thermal sensitivity, this has basically the same on paper spec as the latest base model research thermal camera from FLIR 20-Sep-20 01:40 AM before it becomes a paperweight I'd take some of the internals out, they can be useful for other stuff 20-Sep-20 01:51 AM This thing was actually used in the first generation of this targeting pod: https://en.wikipedia.org/wiki/Litening 20-Sep-20 01:51 AM So most certainly not exportable tech under ITAR 20-Sep-20 01:51 AM Specifically used in the "LITENING ER" version, which is still in service. Although apparently the military version is a lot better in terms of thermal sensitivity 20-Sep-20 01:51 AM And I guess huge improvements in readout electronics allowing higher framerate and super-resolution capabilities 20-Sep-20 10:33 AM I have some MWIR cameras that I purchased for looking at absorbance of gasses like CO2 and propane 20-Sep-20 10:33 AM I don't think I would buy that camera though, the documentation on such cameras is really poor in general, and you have no idea if the Stirling engine in that still works 20-Sep-20 10:33 AM @Mason_Yu this is what a camera like that looks like internally 20-Sep-20 10:33 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/20200920_103422-FD52D.jpg 20-Sep-20 10:33 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/20200920_103536-F47A1.jpg 20-Sep-20 10:36 AM Yeah I would not buy that camera 20-Sep-20 10:36 AM How old is yours? What's the thermal resolution? 20-Sep-20 10:37 AM I think mine is from the mid 2000s, 320*240 NTSC output. 20-Sep-20 10:37 AM I ended up having to do some serious board reworking to get them to go again, and went so far as to also figure out how to control all their functions with a python program. 20-Sep-20 10:37 AM Like the lens focal length and shutter, sensor gain, etc 20-Sep-20 10:40 AM Ah at least it has a video output... That FLIR outputs to an external ADC box, and to DIY that would require WAY too much effort with no documentation 20-Sep-20 10:40 AM No way FLIR will give hardware documentation to people because of the military application 20-Sep-20 10:40 AM And probably really hard to reverse engineer... 20-Sep-20 10:41 AM I think all the military cameras have analog video output, I've messed around with like four or five of them now from different manufacturers and they all had that 20-Sep-20 10:42 AM They produce analog video after the ADCs 20-Sep-20 10:42 AM Move to Vancouver, befriend someone who works at flir, steal designs 20-Sep-20 10:42 AM And probably really hard to reverse engineer... @Mason_Yu I sh_t you not the cameras I have run windows embedded 20-Sep-20 10:43 AM Dang, well that FLIR needs this box with a mil-spec connector on it to run: 20-Sep-20 10:43 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/unknown-B6E4F.png 20-Sep-20 10:43 AM Then the 40 pin d-sub connector goes to a PCIE frame grabber card. 20-Sep-20 10:44 AM It's also possible that one of those BNC jacks is a video signal but if it's not, you're very unlikely to get somebody at FLIR to give a damn about it 20-Sep-20 10:44 AM They don't exactly have the friendliest customer support 20-Sep-20 10:45 AM Yeah can't tell with a blurry picture 20-Sep-20 10:45 AM But yeah this box is not gonna pop up on eBay anytime soon 20-Sep-20 10:45 AM You can also use this 20-Sep-20 10:45 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/unknown-44092.png 20-Sep-20 10:46 AM MWIR cameras which work are really rare, I was waiting for a long time to get ones that worked. When the opportunity came I got 3 and fixed all of them. 20-Sep-20 10:46 AM Last experiment was observing flammable gas leaks 20-Sep-20 10:46 AM https://civilpedia.org/p/?pid=355&t=p&h=Propane+Gas+Camera 20-Sep-20 10:53 AM Really cool stuff. Do you have dead pixels on your camera? Or is it some post-processing artifact? 20-Sep-20 10:53 AM I wonder if you can convert the Stirling cooled detector to LN2 20-Sep-20 10:53 AM Would make the system even bulkier and harder to use, but hey, it should really increase sensitivity 20-Sep-20 12:34 PM @Mezmorizor does your school sell branded masks? mine started to, we should swap lol 20-Sep-20 01:39 PM I don't think so, but I'd need to check 20-Sep-20 01:39 PM Granted it's a big enough brand that you can probably find knock offs 20-Sep-20 07:27 PM Ok, fair warning, I’ve got a very non-traditionally romantic girlfriend with an... unusual... sense of humor. 20-Sep-20 07:27 PM So I’m thinking what’s something thoughtful I can give her as a wedding gift? 20-Sep-20 07:27 PM It came to me. 20-Sep-20 07:27 PM This is so wrong. 20-Sep-20 07:27 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/image0-1B40B.png 20-Sep-20 07:27 PM Nothing says Live Love Laugh like photo coasters from the world’s worst industrial nuclear disaster. 20-Sep-20 07:27 PM The inspiration came from this coaster set. It will make no sense if you haven’t seen Midsommar, but if you have, it’s completely cringe worthy. 20-Sep-20 07:27 PM https://twitter.com/milkteatown/status/1210023510371749888?s=21 20-Sep-20 07:51 PM don't dead open inside 20-Sep-20 07:51 PM they're nice photos too 20-Sep-20 08:04 PM Thanks! 21-Sep-20 11:11 AM https://cdn.discordapp.com/attachments/477563442719490049/757650739379306626/66d053bf66b9195af7a0d7af748f6b60a495551f95887e6cfaba21b9cdafece7_1.mp4 21-Sep-20 11:23 AM Math - not even once 21-Sep-20 02:34 PM squeeky squeeky (hiked) 21-Sep-20 02:34 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/DSC_1952-5F38E.jpg 21-Sep-20 03:06 PM @SleepyOwl Joyce thanks, I needed that laugh before I jump back into my EE textbook to read about impedance and doing Ohm’s Law with complex numbers. It’s bad enough numbers get names, but what kind of sick mathematician decided that e could be raised to an imaginary number and spit out complex numbers with sines and cosines? 21-Sep-20 03:08 PM Euler is quaking in his boots rn 21-Sep-20 03:11 PM I just came across 'euler springs' this morning 21-Sep-20 03:11 PM so, actually, the use for some of the springs I have been looking into are used for vibration damping a bit, I was curious who all have used 'simple' springs for like a STM or whatever, with success, and how you went about it 21-Sep-20 03:11 PM more so, if you utilized "zero-length" springs 21-Sep-20 03:31 PM It’s so funny that LCR circuits use the same diff eq as a damped spring. 21-Sep-20 03:37 PM but that's the beauty of it isn't it? 21-Sep-20 03:37 PM the same mathematical tools, Laplace transforms, etc can be used 21-Sep-20 03:37 PM the behavior of systems, mechanical or electrical can be described 21-Sep-20 03:46 PM also, unable to find any info on "zero-length" torsional springs.. half a thought of making such a thing as hairspring for watches 21-Sep-20 03:46 PM I'm going down rabbit holes this week as it is raining (well, starting tomorrow night) and I cant exactly do exterior house work.. at least the smoke is mostly gone (wow, AQI of 27 today) 21-Sep-20 03:46 PM the idea of pre-stressing the hairspring at rest(equilibrium) doesnt sound good though,, but my goal is if an alternate shape works that gives a big gain (swing/amplitude) with a smaller spring, instead of a super long hairspring for low vibrations 21-Sep-20 05:42 PM Have you seen the spring in a Hamilton 21 chronometer? 21-Sep-20 05:43 PM Suspiciously specific 21-Sep-20 07:21 PM helical, as most marine chronometers are.. not sure if it is one with the special pivoting stud or not, but those exist too 21-Sep-20 07:21 PM I havent studied detents too much.. although the co-axial is kind of a double one, it isnt 21-Sep-20 07:21 PM I get the concept, just havent ever had one in my hands 22-Sep-20 03:28 AM Math - not even once 22-Sep-20 01:36 PM It’s so funny that LCR circuits use the same diff eq as a damped spring. @rdpierce https://www.youtube.com/watch?v=vf1s20EtW9o 22-Sep-20 01:36 PM the part beginning at about 6:20 looks really nice 22-Sep-20 01:45 PM I’ve got a Hamilton 21. It runs. Cleaning and oiling it is on my to do list. 22-Sep-20 01:45 PM There’s a military technical order describing how to service it. 22-Sep-20 10:44 PM This picture makes me far too uncomfortable to not share 22-Sep-20 10:44 PM https://i.redd.it/6ckagp0uhpo51.jpg 22-Sep-20 10:59 PM do it with a vacuum feedthrough 22-Sep-20 10:59 PM and then put a cold head on the chip 22-Sep-20 10:59 PM ❄️ 22-Sep-20 11:09 PM hmm 22-Sep-20 11:09 PM that's alot of wires 22-Sep-20 11:09 PM question is, does it really work? 22-Sep-20 11:09 PM saw such picturs often - but isit real or only a sophisticated meme? 22-Sep-20 11:44 PM It wouldn't work for sure even if you're a god who soldered every pin properly, processors are at a level of sophistication where your wire material and length matters a lot, but no idea if it's real 23-Sep-20 12:08 AM assuming everything is connected up properly I would think that it working or not would depend on how accurately you cut the wires, amount of ambient RF interference, and what exactly the chip does 23-Sep-20 12:08 AM wonder how accurate the wire lengths need to be for various speeds 23-Sep-20 01:39 AM Half of the pins are likely for ground anyway 23-Sep-20 02:57 AM This picture makes me far too uncomfortable to not share @Mezmorizor "I fear no man; but that thing... it scares me" 23-Sep-20 02:57 AM although I am going to take part in this travesty myself 23-Sep-20 02:57 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IjFLzN6B14geGdJsuuH1kQpB9zeEnF8SXbPUhx8omK-085D9.png 23-Sep-20 03:53 AM What in the... 23-Sep-20 03:53 AM https://pubmed.ncbi.nlm.nih.gov/31850126/ 23-Sep-20 03:53 AM how does stuff like this get published? 23-Sep-20 04:24 AM If you create your own journal, you can publish whatever you want... 23-Sep-20 04:26 AM fair 23-Sep-20 04:26 AM although 23-Sep-20 04:26 AM Open Access Macedonian Journal of Medical Sciences 23-Sep-20 04:26 AM hmmmmm 23-Sep-20 04:26 AM let's see 23-Sep-20 04:40 AM https://www.scimagojr.com/journalsearch.php?q=21100824403&tip=sid&clean=0 23-Sep-20 04:40 AM hmmmm 23-Sep-20 07:16 AM It wouldn't work for sure even if you're a god who soldered every pin properly, processors are at a level of sophistication where your wire material and length matters a lot, but no idea if it's real @Mezmorizor If you supercool them the material properties change 25-Sep-20 10:59 AM @funranium Just making sure you get to enjoy this https://youtu.be/3NRriVUjErM?t=807 25-Sep-20 11:09 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/unknown-DA1A6.png 25-Sep-20 11:09 AM love it 25-Sep-20 11:47 AM To steal from Doug Stanhope, I’m Phil Broughton, that’s why I drink. 25-Sep-20 12:11 PM @funranium how much NO is ok to breathe ? 25-Sep-20 12:11 PM https://nj.gov/health/eoh/rtkweb/documents/fs/1357.pdf claims the odor threshold is << 10ppm and that 25ppm is the "8 hour day" permissible level 25-Sep-20 01:03 PM without being able to measure, how well can I calculate the predicted concentration? Flux through a scroll will be like 0.05 torr L/s 25-Sep-20 01:22 PM Not quite my bailiwick. 25-Sep-20 01:26 PM rip peers 25-Sep-20 01:26 PM my math makes it seem much lower than 1ppm 25-Sep-20 01:26 PM and we can't smell it 25-Sep-20 01:28 PM How long term is this experiment? 25-Sep-20 01:28 PM Because we have a gen chem lab that expels NO (enough that it's very visible). They're supposed to do that step in the hood, but it's gen chem so stuff happens. In the short term at least it's not fun but we still do it so it can't be THAT dangerous. 25-Sep-20 01:28 PM At least in my experience from that lab the exposure is pretty similar to a yellow air quality level 25-Sep-20 01:28 PM Assuming academic lab scale of course 25-Sep-20 02:39 PM I’m getting worried. My EE class is moving on to variable frequency response of R,L,C circuits. This doesn’t Bode well. 25-Sep-20 02:41 PM Well done! 25-Sep-20 02:41 PM clap clap 25-Sep-20 02:43 PM painful groan 25-Sep-20 02:43 PM it hurts just the right way 25-Sep-20 02:44 PM I say 25-Sep-20 02:44 PM this is a splendid use of a degree in EE 25-Sep-20 02:44 PM electrifying and shocking puns. 25-Sep-20 02:44 PM and I will certainly say 25-Sep-20 02:44 PM you totally couldn't resist doing that amirite 25-Sep-20 02:47 PM longish term 25-Sep-20 02:47 PM idk couple years 25-Sep-20 02:47 PM depends how much time they spend doing REMPI for REMPI's sake rather than getting on with the plasma 25-Sep-20 02:55 PM Oh, yeah there are some long term things I don't know about that you should worry about there 25-Sep-20 02:55 PM And on the subject of humor.... omgs squuuueeeeee they arrived, I did it, I can’t believe I did it, this is waaayyyy too wrong.... 25-Sep-20 02:55 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/image0-DD070.jpg 25-Sep-20 02:56 PM I see you've decided to go the nuclear option 25-Sep-20 02:56 PM Wow that’s amazing and cursed 25-Sep-20 02:57 PM I know.... it’s like if I believed in hell I’d have to wonder if I was going there for this. 25-Sep-20 02:57 PM How's your S.O taking it? 25-Sep-20 02:58 PM Haven’t given them to her yet. Wedding present. 25-Sep-20 02:58 PM right 25-Sep-20 03:00 PM We enjoyed the horror movie Midsommar, and someone took promo stills from that movie and turned them into coasters using these captions. 25-Sep-20 03:00 PM The irony was perfect. 25-Sep-20 03:00 PM So have any of you worked at LANL and are also omnivores? Or travelled in that area? 25-Sep-20 03:00 PM I’ve been wondering about the famous hatch green chili cheeseburger at the Owl Bar and Grill. 25-Sep-20 04:57 PM And, yes @SleepyOwl Joyce I can’t resist the puns, but I didn’t expect everybody to get so reactive. 25-Sep-20 04:58 PM you gotta say 25-Sep-20 04:58 PM the impedance towards puns here seems quite low 25-Sep-20 04:58 PM Ohmigosh yes.... 25-Sep-20 04:59 PM and besides - electronics puns charges me up 25-Sep-20 04:59 PM I am pretty sure a few of you here would... resonate with that 25-Sep-20 06:31 PM So, I apologize for the flippant answer earlier @idmb. I was walking across campus to deal with an issue. I'm not an industrial hygienist but I'm not completely ignorant and I have IHs handy to ask questions. Nitric oxide is tricky. The usual answer is "ventilate like crazy". 25-Sep-20 07:40 PM I have a half liter of big kid strength nitric in its original shipping box. Im scared to open it! I am gonna wait till I have the new shop and can have a proper fume hood. 25-Sep-20 07:48 PM Wise. I never want eye nitric again. 26-Sep-20 01:08 AM let's have a 'look' 26-Sep-20 01:08 AM @funranium what are your feeels if you're watchin https://www.youtube.com/c/ExplosionsFire2 26-Sep-20 01:48 AM @rdpierce just watched midsommar, expected a lot more edginess based on the trailer. Was entertained but a little underwhelmed. I think those coaster sets lacks the best line of the movie though. 26-Sep-20 01:48 AM Movie line / sentiment 26-Sep-20 08:01 AM That’s how I felt about the movie 26-Sep-20 08:03 AM I think it says less about the movie and more about the saccharine views of love that get presented as normal for society, which get distilled into “live love laugh”. Kind of like when Katie used that style of graphic: 26-Sep-20 08:03 AM https://twitter.com/nuclearkatie/status/1233121795621912578?s=21 26-Sep-20 08:52 AM https://discordapp.com/channels/513115950501855256/514721733626822666/744281137505108149 26-Sep-20 08:57 AM @GigaSquirrel It is one of those things that warms the heart that someone from the other side of the world drops me a line to discuss Shed Chemistry Safety with me. 26-Sep-20 08:59 AM Heh, yeah, he's a really cool dude 26-Sep-20 08:59 AM a friend of mine wanted an autograph from him, so I asked tom and a month later this is what arived at my door 26-Sep-20 08:59 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/unknown-FE460.png 26-Sep-20 08:59 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/unknown-530AB.png 26-Sep-20 09:06 AM HA! 26-Sep-20 09:34 AM had a good laugh 26-Sep-20 07:26 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/image0-FE70B.png 26-Sep-20 07:26 PM Kilroy was a bandpass filter. 26-Sep-20 09:45 PM what is up 26-Sep-20 09:48 PM The ceiling, the sky, the stars above? 26-Sep-20 09:48 PM depending on reference frame i suppose 26-Sep-20 09:49 PM how is your project going? 26-Sep-20 09:49 PM I tried to measure a HV supply that is meant to be powered by DC 12V 26-Sep-20 09:49 PM I killed my lab power supply in the process 26-Sep-20 09:49 PM oh no! i'm sorry how did you kill it? 26-Sep-20 09:50 PM so it's on my desk now, doing troubleshooting 26-Sep-20 09:50 PM cool. curious to hear what you find 26-Sep-20 09:50 PM probably from the inductive kickback of the flyback? 26-Sep-20 09:50 PM i need to fix my benchtop supply...the voltages have variation by 1-3V pseudorandomly and i'm not sure why 26-Sep-20 09:51 PM I see! 26-Sep-20 09:51 PM @samy want a high vacuum chamber? 26-Sep-20 09:51 PM how did you measure the HV supply? 26-Sep-20 09:51 PM @idmb ummmm i think so!! 26-Sep-20 09:51 PM one of yours? from what? 26-Sep-20 09:51 PM https://discord.com/channels/513115950501855256/513120957821485056/750877392008118332 comes with flanges on four out of six sides 26-Sep-20 09:51 PM I stopped it from going to metal recycling, so technically it's not from my group 26-Sep-20 09:52 PM oh wow! 26-Sep-20 09:52 PM how did you measure the HV supply? through a HV probe 26-Sep-20 09:52 PM huge chunk of stainless 26-Sep-20 09:52 PM but apparently nobody else is near vancouver. 26-Sep-20 09:52 PM connected to the scope 26-Sep-20 09:53 PM it's 10" diameter? 26-Sep-20 09:53 PM 10" OD 26-Sep-20 09:53 PM I think that makes it 8" ANSI/ASA? 26-Sep-20 09:53 PM yeah i'm in los angeles 26-Sep-20 09:53 PM know what the weight is? 26-Sep-20 09:54 PM there's so many of you on the west coast of the US, why don't any of you have any friends in Canada who can hold it for ya 26-Sep-20 09:54 PM @SleepyOwl Joyce interesting, so it shouldn't have caused an issue? 26-Sep-20 09:54 PM It's pretty heavy. 26-Sep-20 09:54 PM I do but she’s in Quebec 26-Sep-20 09:54 PM @Addison-110m that's not even canada 26-Sep-20 09:54 PM @idmb they can hold it, but i don't know what they'll do with it after! 26-Sep-20 09:54 PM lol 26-Sep-20 09:55 PM I'm sure the border will open eventually 26-Sep-20 09:55 PM i appreciate you thinking of me. let me see what shipping rates may be in case i can get someone to pick it up. are you selling it or just getting it off your hands? 26-Sep-20 09:55 PM @samy it shouldn't 26-Sep-20 09:56 PM it's free but must go to good home and I'm not a huge fan of having to package it up to ship it... so would much rather hand it off to someone directly 26-Sep-20 09:56 PM of course, understood 26-Sep-20 09:56 PM What happened was that I happened to bring an insulated metal plier close to the output wire 26-Sep-20 09:56 PM I have relatives in Vancouver, but there's no way in hell they're gonna hold this big chunk of steel for me 26-Sep-20 09:56 PM Then the next thing I know 26-Sep-20 09:56 PM Magic smoke 26-Sep-20 09:56 PM even with two people I took all the flanges off before lifting it off the cart it's pictured on 26-Sep-20 09:56 PM because it's that heavy 26-Sep-20 09:56 PM ahh wow 26-Sep-20 09:57 PM the blanks are basically 10" OD 0.75" thick stainless, heavy 26-Sep-20 09:57 PM Then I was just "oh darn oh darn" 26-Sep-20 09:57 PM So here we are 26-Sep-20 09:57 PM Fixing this supply 26-Sep-20 09:57 PM If you check #general I have some photos 26-Sep-20 09:58 PM @Mason_Yu since it's stainless they could probably store it outside 26-Sep-20 09:59 PM i'm dejected from trying to build a wimshurst machine and can't get greater than 2V across the spark gap 26-Sep-20 09:59 PM How's your own QKD experiment? 26-Sep-20 09:59 PM I am taking mine slow and easy 26-Sep-20 09:59 PM My teammate @iz is busy with school and all 26-Sep-20 09:59 PM So not going to rush this 26-Sep-20 10:01 PM @idmb This is an elderly couple in their 70s and 80s, no way they're gonna get something they can never move on their own and just put it outside 26-Sep-20 10:01 PM do they have a garden? it would make a nice planter 26-Sep-20 10:02 PM Don't you have any better ideas for it than a flower pot? 26-Sep-20 10:02 PM why do you think I'm giving it away 26-Sep-20 10:02 PM Why did you get it in the first place then? 26-Sep-20 10:02 PM it was gonna be metal recycled 26-Sep-20 10:03 PM Sounds like a good place for it if you don't have any better ideas... Unfortunate, I agree, but that's the nature of the circle of life 26-Sep-20 10:03 PM @SleepyOwl Joyce still early, i've started laser + filter setup. trying to understand EM a bit better and been working on a diff project attempting to create an EM transmitter without any inductive/electrical path to antenna, and wimshurst machine is a means to an end for that project, but that has not been going well 26-Sep-20 10:04 PM I see 26-Sep-20 10:04 PM For the classical channel and beam alignment 26-Sep-20 10:04 PM Issac and I have decided on LoRa 26-Sep-20 10:04 PM @idmb Maybe make a big fusor out of it by putting on some acrylic flanges and make your own feedthrough? 26-Sep-20 10:05 PM I have yet to confirm my optical setup 26-Sep-20 10:06 PM I could stuff it with nude ion gauges 26-Sep-20 10:06 PM and just run them as a pretty lamp 26-Sep-20 10:06 PM I've burnt through the filament on mine 26-Sep-20 10:07 PM wait do you only have one 26-Sep-20 10:07 PM Because full range gauges that are enclosed are that much better 26-Sep-20 10:07 PM we have a drawer of filaments and a cupboard full of the gauges, none are being used 26-Sep-20 10:07 PM like I think we have 15+ nude gauges 26-Sep-20 10:07 PM have switched to cold cathodes for everything 26-Sep-20 10:07 PM because yay no ion noise on mcp 26-Sep-20 10:08 PM It will be a bit of time before I get to the first outdoor experimental setup 26-Sep-20 10:09 PM Huh that's an interesting requirement. Do all hot gauges (pirani included) produce significant noise on an MCP? @idmb 26-Sep-20 10:09 PM Or just hot ion gauges? 26-Sep-20 10:10 PM Just hot ion afaik 26-Sep-20 10:10 PM Have only used them and MKS 500 cold cathodes on mcp chambers and the latter doesn’t produce noise 26-Sep-20 10:11 PM Hmm, make sense, no significant voltages applied in pirani gauges 26-Sep-20 10:11 PM Note we also have double stack mcps so the gain is higher 26-Sep-20 10:21 PM Speaking of large chunks of metal that I might not want to have anything to do with: https://swapauction.wisc.edu/Listing/Details/7974749/Cryogenic-Pump-w-Controller-PARTS-REPAIR 26-Sep-20 10:21 PM That's just an insanely big cryopump that my helium compressor might be able to run 26-Sep-20 10:21 PM Kinda tempted to just go in and get the cold head and all the gauges and controller, then leave the actual cryopump housing somewhere 26-Sep-20 10:21 PM It looks like a detachable cold head luckily 26-Sep-20 10:24 PM It looks fun 26-Sep-20 10:30 PM I guess that must be an ISO400-F flange... No way in hell am I bringing that big of a thing home 26-Sep-20 10:30 PM I wonder what it was used for, perhaps some space simulator? 26-Sep-20 10:38 PM 18000 L/s pumping speed for water 26-Sep-20 10:47 PM I guess the two stage GM cryocooler can do 100W in the first stage and 5W in the second stage 26-Sep-20 10:47 PM Unfortunately it looks like the cold head is powered from the compressor 26-Sep-20 10:48 PM Which aren’t?... 26-Sep-20 10:49 PM Mine isn't 26-Sep-20 10:49 PM Crazy 26-Sep-20 10:49 PM It's just a motor inside the cold head powered by line AC with a switch 26-Sep-20 10:49 PM This cold head wants 220-240V 2 phase though 26-Sep-20 10:49 PM Yeah actually the power is just on a completely different level, don't think my compressor can run this thing continuously 26-Sep-20 10:49 PM And the aeroquip connector seems to be one size bigger 26-Sep-20 10:55 PM I do know they don’t spec things correctly, sumitomo at least 26-Sep-20 10:55 PM Their compressors are better than they say 26-Sep-20 10:55 PM In terms of being able to run multiple and cooling power with longer than advertised lines 26-Sep-20 10:57 PM Mine is from CTI cryogenics, 2.5 kW compressor versus 8.5 kW on that Leybold one 26-Sep-20 10:59 PM I mean they still run don’t they 26-Sep-20 10:59 PM Just lower power / higher temp 26-Sep-20 10:59 PM The size is just comical: 26-Sep-20 10:59 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/unknown-C665F.png 26-Sep-20 10:59 PM Yeah I think they still run, not sure about compressor efficiency at lower pressures. Perhaps I can just run the cold head slower 26-Sep-20 10:59 PM I want to see a cross section 26-Sep-20 10:59 PM Show me the fins!!!! 26-Sep-20 10:59 PM At a lower frequency I mean 26-Sep-20 10:59 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/unknown-25FB0.png 26-Sep-20 10:59 PM https://www.ebay.com/itm/LEYBOLD-COOLPAK-6000-COMPRESSOR-RGD-5-100-COLD-HEAD-COOLVAC-10000-CRYOPUMP-/292482183636 26-Sep-20 10:59 PM The shell shouldn't be that heavy actually 26-Sep-20 10:59 PM On the datasheet it says this thing weighs only 42 kg? (The 5000 L/s version) 26-Sep-20 10:59 PM I struggle to believe that 26-Sep-20 11:03 PM It’s just a huge area of conductive material isn’t it 26-Sep-20 11:04 PM I think it weighs 42 kg without the cold head, that sounds a bit more reasonable? 26-Sep-20 11:05 PM Cold heads aren’t that heavy 26-Sep-20 11:05 PM Like 8kg or something? Idr 26-Sep-20 11:05 PM They’re always mounted to heavy junk 26-Sep-20 11:06 PM I mean there's a lot of steel in this thing, I'm guessing closer to 20 kg 26-Sep-20 11:09 PM 18kg for mine apparently 26-Sep-20 11:09 PM The ISO400-K chamber might actually be a decent vacuum chamber to someone. It has ports of useful sizes, 3x KF-40, 2x KF-16, 1x ISO 160 26-Sep-20 11:09 PM Stronger than I thought ? 26-Sep-20 11:09 PM How cheap can you make a blank for iso400 26-Sep-20 11:12 PM I'd just get a blank stainless/aluminum sheet, drill the bolt pattern and make a ring spacer of the appropriate size and put in a ridiculously large o-ring 26-Sep-20 11:12 PM Probably $200 - $300 26-Sep-20 11:12 PM How thick does that have to be? 26-Sep-20 11:12 PM A 1” disk will be more than that 26-Sep-20 11:13 PM Good point, probably closer to $400 for a sheet of that size 26-Sep-20 11:13 PM And uh 26-Sep-20 11:13 PM Have fun carrying it lol 26-Sep-20 11:13 PM Roll it around 26-Sep-20 11:13 PM Yeah I need a helper 26-Sep-20 11:13 PM Or find a scrap yard close by 26-Sep-20 11:14 PM Tbh 26-Sep-20 11:14 PM You could just use a ton of acrylic 26-Sep-20 11:14 PM Thiner sheets are cheap by volume 26-Sep-20 11:14 PM Just layer tons of acetone between and melt em together 26-Sep-20 11:14 PM Centering ring with O-ring is only $213 from Lesker 26-Sep-20 11:14 PM Heck that’s not that much more than iso 250 26-Sep-20 11:15 PM There's really no point keeping the chamber, I'd be in a worst position than you have found yourself in 26-Sep-20 11:15 PM I have literally no storage space left 26-Sep-20 11:16 PM It would make a great plant pot. 26-Sep-20 11:16 PM Yes it would 26-Sep-20 11:20 PM The kf would even be drainage 26-Sep-20 11:20 PM Just place a well sized rock above them 26-Sep-20 11:20 PM It has temperature sensors and heaters built in too 26-Sep-20 11:20 PM Heck, are there any environmental concerns to using big stainless Chambers for plant pots? 26-Sep-20 11:20 PM If you got that here 26-Sep-20 11:20 PM I would take it 26-Sep-20 11:20 PM For plants 26-Sep-20 11:22 PM I would trade this thing for your chamber 26-Sep-20 11:22 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/unknown-0F4A2.png 26-Sep-20 11:22 PM But no way in hell am I shipping it to you 26-Sep-20 11:22 PM Road trip 26-Sep-20 11:22 PM We can meet in peace arch park 26-Sep-20 11:22 PM (We can’t, for... reasons?) 26-Sep-20 11:46 PM Found the cold head datasheet, weighs 11 kg only apparently 26-Sep-20 11:46 PM <10 K on the second stage 26-Sep-20 11:50 PM Ha, we were wrong by the same amount in opposite directions 26-Sep-20 11:50 PM 10k will need nice high vacuum and good shielding presumably 26-Sep-20 11:51 PM And the second unmarked power supply thing in the rack might be the controller for the cold head motor too 26-Sep-20 11:51 PM Yeah absolutely 26-Sep-20 11:51 PM Ooh nice 26-Sep-20 11:52 PM The more likely case is that it's just a giant switch for the compressor 26-Sep-20 11:52 PM With loads of fuses and interlocks 27-Sep-20 12:03 AM Yeah that rack is definitely not the power supply for the cold head 27-Sep-20 12:03 AM This one is, hopefully it's not using a super hard to find connector again like Leybold always does https://www.ebay.com/itm/Leybold-844235-COOLVAC-Power-Supply-AMAT-Applied-Materials-0190-03798-New/172136220343 27-Sep-20 08:37 AM The cables are usually pretty dinky 27-Sep-20 08:37 AM So a homemade bad connector can’t be that bad 27-Sep-20 11:26 AM https://github.com/jankae/VNA 27-Sep-20 12:00 PM Looks like he's working on a new one, too. 27-Sep-20 07:56 PM Made mead with honey from a friend. Yum, 13% 27-Sep-20 07:56 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/image0-B0964.jpg 27-Sep-20 08:20 PM @idmb epoxy'd viewport worked like a charm thanks for the tip 27-Sep-20 08:23 PM Did you go with an o ring in between? I’m certain all we’ve got are selection bias 27-Sep-20 09:07 PM Nope, just right on the weld flange. 27-Sep-20 09:10 PM Neat 28-Sep-20 05:35 AM mmm, mead.... 28-Sep-20 12:50 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20200928_214931-5E459.jpg 28-Sep-20 12:50 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20200928_214945-AABDA.jpg 28-Sep-20 12:50 PM mhh oily oil 28-Sep-20 12:55 PM for cooking or for pumping 28-Sep-20 01:41 PM @mike crb soooo do you do anything with nanopores? 28-Sep-20 01:41 PM for being disposed 28-Sep-20 01:41 PM just repaired a bit crusty leybold D16B for the local fablab 28-Sep-20 01:41 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20200928_224008-14EE4.jpg 28-Sep-20 01:51 PM @nmz787 I don't, but I have a lot of friends who do nanopore echem work 28-Sep-20 01:51 PM so we talk about it a lot, mainly ion rectification stuff 28-Sep-20 01:51 PM I was reading last night about salt bridges 28-Sep-20 01:51 PM And like, their pros and cons 28-Sep-20 01:51 PM Gonna try a wet test with this custom amplifier this week using some glass micro pipettes 28-Sep-20 01:51 PM Silver wire dipped in chlorox to chlorinate 28-Sep-20 01:51 PM KCl as electrolyte 28-Sep-20 01:53 PM AgCl reference? 28-Sep-20 01:54 PM Idk if stuff like how much wire surface area is exposed matters 28-Sep-20 01:54 PM Well I'm getting 99.99% pure silver wire 28-Sep-20 01:54 PM Dipping in bleach for 30 minutes make AgCl layer 28-Sep-20 01:54 PM ok 28-Sep-20 01:54 PM are you using it as a reference though? 28-Sep-20 01:55 PM I guess? 28-Sep-20 01:55 PM Using it as the only wires 28-Sep-20 01:55 PM One on either side of the pore 28-Sep-20 01:55 PM (pipette in this case) 28-Sep-20 01:56 PM oh okay. yeah that'd work for 2 electrode system. 28-Sep-20 01:56 PM was thinking like Ag/AgCl counter/reference that SICM people using a lot 28-Sep-20 01:58 PM Ah, i forgot there are different number of electrode arrangements 28-Sep-20 01:58 PM The whole working vs reference vs ground or whatever 28-Sep-20 01:58 PM Maybe that's only important for voltammetry?? 28-Sep-20 01:58 PM In this case I'm looking at current 28-Sep-20 01:59 PM yeah, i'm used to 3 electrode cells so that's what I typically assume when I see agcl 28-Sep-20 01:59 PM It's been like 5 or 6 years since I really thought about this stuff 28-Sep-20 01:59 PM Yeah definitly important for voltametry, for current measurements it can be important too 28-Sep-20 01:59 PM for nanopore stuff 2 electrode works 28-Sep-20 01:59 PM cause you aren't looking at redox just charge transport across the pore 28-Sep-20 02:04 PM Mmm, ok 28-Sep-20 02:05 PM https://pubs.acs.org/doi/10.1021/la702955k this paper may have some stuff of interest to you. probably some good references too 28-Sep-20 02:05 PM Was looking at stuff about salt bridges, thinking about how adding a sample (to interogate with the nano pore) could mess things up 28-Sep-20 02:05 PM But I didn't finally make up my mind 28-Sep-20 02:05 PM Oh that paper looks interesting, thanks 28-Sep-20 02:05 PM This page was interesting to read too 28-Sep-20 02:05 PM http://www.vl-pc.com/default/index.cfm/technical-info/reference-electrodes 28-Sep-20 02:05 PM Specifically "Looking at this table, one can see why KCl is a very popular reference electrolyte fill solution.  Potassium has a limiting equivalent conductance of 73.5, while Chloride has a limiting equivalent conductance of 76.4. " 28-Sep-20 02:05 PM So I guess they mean the electrophoretic potentials are pretty similar? 28-Sep-20 02:08 PM Yeah 28-Sep-20 02:08 PM And thus like, impedance or something is well matched? 28-Sep-20 02:08 PM For the electronics to play nicely??? 28-Sep-20 02:08 PM Or also for limiting weird diffusion depletion effects? 28-Sep-20 02:09 PM yeah also double layer effects 28-Sep-20 02:09 PM Like vacuuming up all of the ions on one side of the pore/cell 28-Sep-20 02:09 PM Hmm 28-Sep-20 02:09 PM Seems like the reason for using a salt bridge with a real sample, say blood or centrifuged saliva/spit... Would be to eliminate plating of non AgCl on the electrode and thus changing it's sensitivity 28-Sep-20 02:12 PM Yeah, that can be an issue. So you would want to reference against something like a saturated calomel electrode before and after 28-Sep-20 02:12 PM One application is patch clamp bio stuff, where they have the AgCl electrode in a glass pipette then shove the pipette into a cell/neuron... Where there could be other weird electrolytes 28-Sep-20 02:12 PM to make sure the ag/agcl potential hasn't changed too much 28-Sep-20 02:12 PM I'm not working with cells here 28-Sep-20 02:12 PM But matrix-heavy samples yeah 28-Sep-20 02:12 PM Goal is viral serotyping via nano pore 28-Sep-20 02:12 PM The whole potential of electrode still slightly confuses me... Like, it makes sense with a two-potato clock 28-Sep-20 02:12 PM Or battery 28-Sep-20 02:12 PM But in this case, is there really any potential diff with just two unpowered electrodes? 28-Sep-20 02:12 PM I mean, I have to apply a bias voltage to get stuff moving through the pore 28-Sep-20 02:12 PM And that voltage induces a current and that's the circuit the AgCl electrodes are part of 28-Sep-20 02:12 PM I guess spitting on the nanopore could make for some reactive chemistry that induces potentials 28-Sep-20 02:12 PM But presumably I could just wait til it settles before applying my bias and starting to record 28-Sep-20 02:12 PM Idk 28-Sep-20 02:17 PM if theres not redox, then it should be fine 28-Sep-20 02:17 PM because you're just looking at current flow due to ion transport, you do not care about what standardized voltage a reaction occurs at. you just care about the voltage between the two electrodes 28-Sep-20 02:22 PM Hmm, unless a weird small molecule from the sample had a larger charge on it than the KCl background electrolyte 28-Sep-20 02:22 PM It would give a larger current reading, maybe 28-Sep-20 02:22 PM Do salt bridges prevent redox sampling? 28-Sep-20 02:22 PM Sampling/interference 28-Sep-20 02:22 PM Now I'm interested in adding PEDOT:PSS to my google searches, just to see what turns up 28-Sep-20 03:36 PM Your probably wont get much redox unless you're at large potentials 28-Sep-20 03:36 PM Redox occurs at electrode so salt bridge just keeps anode/cathode compartment separate while allowing charge transfer. So that way if you reduced something it wouldn't immediately be oxidized back 28-Sep-20 05:57 PM I found a Salamander today! 28-Sep-20 05:57 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/DSC_1985-FDDFB.jpg 28-Sep-20 06:13 PM Nice! 28-Sep-20 06:13 PM Western Redback 28-Sep-20 06:13 PM found him next to the house as I was restarting exterior work 29-Sep-20 05:21 AM @GigaSquirrel 29-Sep-20 05:21 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/20200929_201843-D33EC.jpg 29-Sep-20 05:21 AM there! 29-Sep-20 05:22 AM woohoo! 29-Sep-20 05:22 AM Vietnamese coffee 29-Sep-20 05:22 AM nice mugshot 29-Sep-20 05:22 AM clap clap clap 29-Sep-20 05:22 AM https://tenor.com/view/%d0%ba%d0%be%d1%84%d0%b5%d1%81%d0%be%d0%b2%d0%b0-coffeowl-coffee-gif-13375447 29-Sep-20 05:23 AM https://giphy.com/gifs/coffee-gif-brockurealities-DrJm6F9poo4aA 29-Sep-20 05:23 AM Are you now SomewhatAwakeOwl Joyce? 29-Sep-20 05:24 AM well the epoxy viewport is very leaky actually 29-Sep-20 05:24 AM I wish it works that quickly 29-Sep-20 05:24 AM but I have found cheap ebay viewports 29-Sep-20 05:24 AM so silver lining 29-Sep-20 05:26 AM well the epoxy viewport is very leaky actually @mike crb leaking or outgassing? 29-Sep-20 05:26 AM leaking 29-Sep-20 05:26 AM held up iso bottle outside of it to check 29-Sep-20 05:27 AM whoops 29-Sep-20 05:27 AM more epoxy I guess 29-Sep-20 05:27 AM hahaha I found these https://www.ebay.com/itm/NW-40-QF-40-VACUUM-VIEWPORT-ALUMINUM-w-O-Ring/113864120392 which seem decent 29-Sep-20 05:29 AM heh I have one or two of those 29-Sep-20 05:29 AM wouldn't mind the small sunk cost of the epoxy one for one that looks much cleaner.... also don't know how I didn't find these in my initial search for viewport 29-Sep-20 07:29 AM drinkin my espresso this morning 29-Sep-20 07:29 AM sore all over my body from restarting house work 29-Sep-20 07:29 AM I cant do much today though, I have maybe a dozen framing nails left.. got another 4k waiting for me at the hardware store, will head there this eevening 29-Sep-20 12:50 PM So I was listening to a talk at a research reactor organization meeting about nuclear security and there was mention of "nuclear hobbyists" among other 'smaller users' 29-Sep-20 07:51 PM NOPE NOPE NOPE 29-Sep-20 07:56 PM On further elaboration the tone shifted to concern about people digging up information they shouldn’t 29-Sep-20 08:00 PM I have received the polite knock on the door to ask why exactly I was searching for something. When I explained, I got a sagenod and was told I could give up because that information was very specifically not available. 29-Sep-20 08:04 PM Yeah I think I remember you mentioning that at one point 29-Sep-20 09:28 PM aGrep (Search through text) - https://f-droid.org/app/jp.sblo.pandora.aGrep 29-Sep-20 09:28 PM Well that came in nice and handy 29-Sep-20 10:00 PM https://www.aleph.se/Trans/Cultural/Art/tensor.html 01-Oct-20 07:24 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/120196387_10157466286586811_55587930346380-3B783.png 01-Oct-20 07:27 PM groan 01-Oct-20 07:27 PM It’s clear you’ve been inducted into the EE Puns Hall of Fame. 01-Oct-20 07:27 PM When dropping jokes like that, it’s hard to gauge the reactance of your audience. 01-Oct-20 07:29 PM clap clap clap 01-Oct-20 07:29 PM No one can be anything but in admittance to that statement 02-Oct-20 04:02 PM as I am getting closer to tearing down the chimney/fireplace - half a thought a while ago was to build a small coffee roaster appliance in it's place - half thinking of various standard flanges etc 02-Oct-20 07:10 PM Switching from electronics to bread making this weekend. 02-Oct-20 07:16 PM that was march/april 02-Oct-20 07:16 PM peak pandemic times 02-Oct-20 09:04 PM I have three experiments running concurrently. Two with just regular dry yeast and I have a traditional starter out in the warm garage going to see if anything happens. 02-Oct-20 09:15 PM @Noxz that sounds awesome. 02-Oct-20 09:15 PM There had been talk of getting a roaster at the PS:One makerspace. Someone tried to experiment with an air popcorn popper. 02-Oct-20 09:16 PM Half thinking of EGR based stuff from diesel engines, when past the initial dehydration and you can reuse exhaust air 02-Oct-20 09:16 PM Also, did you see my clock suggestion? 02-Oct-20 09:17 PM Maybe not? On a doggie play datr now, resend it if its simple, afk now 02-Oct-20 09:18 PM You said in #machining that you wanted to build a clock. 02-Oct-20 09:18 PM I was going to suggest this: 02-Oct-20 09:18 PM https://en.wikipedia.org/wiki/Shortt–Synchronome_clock 03-Oct-20 04:49 AM cool 03-Oct-20 12:00 PM oh, yes, I checked it out a little.. I have questioned sealing up thee watches in a vacuum before, also copper knife edge gaskets, etc 03-Oct-20 01:37 PM Apparently it’s only a partial vacuum. 03-Oct-20 01:37 PM You need some air damping to offset then energy imparted to keep it going. 03-Oct-20 01:37 PM So it’s very likely going to be above the vapor pressure of the oils etc. 03-Oct-20 11:37 PM just use animal fat like the good ol days 04-Oct-20 12:47 AM Anyone in here a beaver trapper, or know one? 04-Oct-20 12:47 AM My son has been asking to eat beaver after we may have seen some during a few hikes. (They may also have been nutria, at least on one occasion, but he hasn't asked to eat them) 04-Oct-20 12:47 AM I'm also interested in trying some bear jerky 04-Oct-20 12:47 AM There's an exotic jerky place near me, but I called and left a message but never got a reply 04-Oct-20 12:50 AM so I guess there was an exotic jerky place near you 04-Oct-20 04:37 AM @mike crb @nmz787 btw, stumbled on this paper for making consistently sized nanopore micropipettes, seemed nifty: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2642537/ tl;dr: pull pipette, melt end so it rounds over, cover melted end with some kind of etch resist except for the bottom which is left exposed, place in glass etching solution. By measuring the current between pipette and bulk solution, you know when the etchant "breaks through", and the amount of current is a proxy for how large the opening is becoming. 04-Oct-20 08:35 AM On the subject of beaver.... 04-Oct-20 08:35 AM https://www.wired.com/2007/04/compubeaver-nas/ 04-Oct-20 08:35 AM This is the Compubeaver: 04-Oct-20 08:35 AM http://www.yourpsychogirlfriend.com/beav/ 04-Oct-20 08:35 AM And the text-o-possum: 04-Oct-20 08:35 AM http://www.yourpsychogirlfriend.com/possum/ 04-Oct-20 08:41 AM doesn't know how to feel about this 04-Oct-20 08:42 AM I know of people who have embedded mice in taxidermied rats. 04-Oct-20 08:43 AM literal computer mice. 04-Oct-20 08:43 AM nice. 04-Oct-20 08:43 AM *computer rat 04-Oct-20 08:43 AM These are all the best kind of cursed 04-Oct-20 08:48 AM More cursed items: 04-Oct-20 08:48 AM https://www.bbc.com/news/technology-36954689 04-Oct-20 08:49 AM slowly backs out of the room 04-Oct-20 12:47 PM cooke rotary snowplow from a locomotive museum a while back... 04-Oct-20 12:47 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/unknown-4BFE9.png 04-Oct-20 12:52 PM Oh @polyfractal that paper looks good. i only skimmed through but it seems like they are getting ~50 nm pore openings? whatever size they're getting it's good enough for single entity work, and seems like it should be easy enough? 04-Oct-20 12:52 PM Only concern is idk how accurate the current to pore size relationship will be, and if you don't have an SEM laying around then checking the pore size will be difficult lol. Might make some trouble down the road when getting approach curves 04-Oct-20 01:18 PM I saw an episode of a (new?) show called extreme ice machines, on Discovery? and one of t hem was the snow 'blower' on a swiss alps resort tram 04-Oct-20 01:18 PM from 6500 to 10k ft elevation, or so 04-Oct-20 01:25 PM @mike crb at one part of the paper they got it down to ~2nm iirc. they mentioned that it gets too hard to SEM it after a while, and switched to using some kind of technique where they "plug" the pore with a molecule of known size. honestly stopped being able to follow how that worked, but they seemed convinced 04-Oct-20 01:25 PM i forget what they were using it for though, not scim 04-Oct-20 01:49 PM well they're still using it for ionic conductance, but the pipette has a cyclodextren macromolecule in the pore, which is essentially a big ring molecule that can bind certain species. When it binds a species the ion conductance goes down, and they found that depending on if its a right or left handed molecule binding to the cyclodextrin, then you get a current response 04-Oct-20 02:36 PM @idmb is that the one in Skagway Alaska? 04-Oct-20 02:38 PM yeah lol 04-Oct-20 02:40 PM only place I have ever seen one and it seemed pretty familiar 04-Oct-20 03:41 PM There's another amazing example down in Snoqualamie, WA 04-Oct-20 03:41 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_7131-EF8DA.JPG 04-Oct-20 03:41 PM good fishing around there, I hear 04-Oct-20 03:49 PM I've taken the scenic train ride in Snoqualmie once before, the falls were nice 04-Oct-20 03:49 PM coastline starlight? 04-Oct-20 03:49 PM not sure if it goes through there 04-Oct-20 03:49 PM but I've taken it from LA -> San Jose, then afdter being th ere for a few years SJC -> Seattle 04-Oct-20 03:49 PM everytime was nice 04-Oct-20 03:49 PM (I jump on a train in Indiana to gete to LA, going t hrough texas and whatnot, for the first part of that trip) 04-Oct-20 03:49 PM the viewing car is great 04-Oct-20 09:41 PM On the subject of fishing, a friend just made gaming dice containing mini fishing lures and fish scales.... 04-Oct-20 09:41 PM I have unusual friends. 04-Oct-20 09:44 PM Those sound kinda pretty 04-Oct-20 09:45 PM https://twitter.com/dicebuffet/status/1312865324853858304?s=21 04-Oct-20 09:46 PM Oh those are really cool 05-Oct-20 03:29 AM getting hard infront of a SEM 05-Oct-20 02:12 PM @polyfractal interesting paper, funny they say it doesn't require anything special, but use buffered HF 05-Oct-20 02:12 PM If you are interested in similar stuff you might check out https://www.nature.com/articles/s41596-019-0255-2 05-Oct-20 02:18 PM ooh, nifty, thanks for the link! lol at "nothing special except this awful acid no one likes working with because it dissolves your bones" 05-Oct-20 02:21 PM Also it seems apparent that those folks don't have enough friends in the physics dept 05-Oct-20 02:21 PM Because they could just throw one of their pipettes into a dual beam fib/sem and cut the tip and check dimensions with a TEM... Or even just do serial block face sectioning and image with the SEM 05-Oct-20 02:21 PM Getting an image of pipette tip was easy enough for me at least for larger pores 05-Oct-20 02:22 PM yeah i was skimming the article and wondering where the SEM image was to validate their design 05-Oct-20 02:22 PM (re the silicone molding section) 05-Oct-20 02:23 PM overall process makes sense though, if you can monitor and etch a single pore, you can scale it up to do a bunch at once 05-Oct-20 02:23 PM They had a sem image of silicone they molded into a pipette they made :p 05-Oct-20 02:23 PM Unfortunately not quite high volume enough for my goals, and not a good way to integrate electrodes for tunneling current (transverse across the pore) 05-Oct-20 02:23 PM Thus my quest to build or find someone locally with atomic layer deposition and DRIE 05-Oct-20 02:28 PM welp, those both sound difficult don't they both need unpleasant gasses to work with? 05-Oct-20 02:46 PM Possibly 05-Oct-20 02:46 PM DRIE needs SF6 and C4F8 05-Oct-20 02:46 PM https://www.atomiclimits.com/alddatabase/ 05-Oct-20 02:46 PM That has a really cool table of inputs and outputs and references 05-Oct-20 03:02 PM That is a great reference 05-Oct-20 03:02 PM If only every chemistry field had such 05-Oct-20 03:02 PM @Noxz https://www.trainmuseum.org/index.php/visit-us/regular-trains 05-Oct-20 03:12 PM I once looked at train tours.. like you own a train car that gets attached to an engine/caboose and it takes you and others that own their own car around 05-Oct-20 03:12 PM -and- done with house work for the day 05-Oct-20 03:12 PM removed most of the chimney, still some sheathing and then to lower it all 05-Oct-20 03:12 PM and too remove the fireplace 05-Oct-20 03:12 PM which wil likely be easier if I just remove all of the studs and just 'slide' it out 05-Oct-20 03:12 PM then I can frame out the smaller bump for... coffee roasting machine? 05-Oct-20 03:12 PM k, back hurts, time to lay down and drone out 05-Oct-20 05:57 PM @funranium so there was a spill of 1L of mercury found in Vancouver. No origin known. 05-Oct-20 06:05 PM WASN'T ME 05-Oct-20 06:05 PM People get very excited for mercury spills that are a fraction of that because everyone has been quite primed to be afraid of it, though I find most people don't quite know why they are. And then there's the spills that are 1000kg+ where no one wants to decon because too hard so they put up fencing and walk away. 1L is in the extra hard middle ground where that's a decent amount and you can't ignore it. 05-Oct-20 06:18 PM It was on a sidewalk 05-Oct-20 06:45 PM That is very incovenient. 05-Oct-20 06:58 PM Did it just fall out of someone's bag? 05-Oct-20 07:13 PM A 1 L of Mercury is actually quite a heavy thing. We had about 200 ml from the cleanup of the factory. Mostly from antique pressure gauges we drained into a single container and mercury is pretty heavy stuff. 06-Oct-20 12:57 AM Yeah that's a /very/ heavy bottle 06-Oct-20 12:57 AM I have a half liter bottle and it's so unnatural to hold, a 1 or 2L bottle would be plain absurd. 06-Oct-20 10:40 AM I feel... unclean... keeping one of my calculators in degree mode because of converting phasors. 06-Oct-20 10:40 AM EE is a special kind of cursed where one writes cos(omega t + theta) with omega in radians per second and theta in degrees. 06-Oct-20 10:46 AM As long as you don’t touch GRAD mode we still accept you 06-Oct-20 04:11 PM True story.... 06-Oct-20 04:11 PM I was visiting a molecular biology grad student’s apartment. 06-Oct-20 04:11 PM I started rummaging through the lower drawer in her fridge. She asked me what the hell I was doing. I said I was looking for the Cas9 in her CRISPR. 06-Oct-20 07:00 PM And now I’m really lamenting the swear bot. I think profanity is necessary to describe this situation and the person who caused it. 06-Oct-20 07:00 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/image0-24851.jpg 06-Oct-20 07:00 PM Someone thought it would be just fine to glue together the valve on a 100 lb propane tank. 06-Oct-20 07:00 PM And return it to the rental company to be delivered to the next unsuspecting user, namely our makerspace. 06-Oct-20 07:00 PM The valve handle broke off in the on position. 06-Oct-20 07:00 PM We are not having any luck using tools on the valve stem to close it. 06-Oct-20 07:00 PM This connects to a hose to a manifold attached to the wall. Everything on that manifold (the forges and a handheld torch) are valved off. 06-Oct-20 07:00 PM We can’t disconnect the cylinder, so the system was left pressurized, checked for leaks, the hot metals area evacuated with signs posted, and someone is coming in tomorrow morning to oversee lighting the forge and burning 50 lbs of propane so we can disconnect the cylinder. 06-Oct-20 07:56 PM I have a friend who ran a construction company 06-Oct-20 07:56 PM They instructed their workers to only use “PERFECT!” as their profane exclamation 06-Oct-20 07:59 PM Profane or propane? 06-Oct-20 07:59 PM Ok that one was bad.... 06-Oct-20 07:59 PM I’m reminded of a certain type of Russian humor where the punch line involves the absence of profanity where it would otherwise be employed. 06-Oct-20 07:59 PM “Vasya, will you kindly desist in pouring molten tin on my head?” 06-Oct-20 08:33 PM You should use this as an aluminum casting opportunity 06-Oct-20 08:33 PM That much propane can melt 10+kg of aluminum easily 07-Oct-20 05:57 PM this just looks wrong 07-Oct-20 05:57 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/69782cb3-a428-4ffb-8812-3e0ef3c364ae-79D79.png 07-Oct-20 05:57 PM basically me and an acquaintance from time to time, talk about FPGAs and stuff at a local monthly hardware meetup 07-Oct-20 05:57 PM I realize we've only talked about toolchains, some uses of FPGAs, etc 07-Oct-20 05:57 PM but we have not done a "Back To Basics" session on FPGAs 07-Oct-20 05:57 PM So in doing research for the subject 07-Oct-20 05:57 PM I found that someone actually made a FPGA out of 74 series logic chips 07-Oct-20 05:57 PM http://blog.notdot.net/2012/10/Build-your-own-FPGA 07-Oct-20 05:57 PM And it seems like a very good implementation and demonstration of how a proper FPGA chip works, so I wanted to build a few of the boards as a demo 07-Oct-20 05:57 PM But even a 3x3 grid of these boards would be quite big and pretty pricey for a one off demo 07-Oct-20 05:57 PM so you have that which I posted above; I have set myself on the path of madness and started implementing the circuits listed on the site... on a FPGA 07-Oct-20 05:57 PM "Yo dawg! I heard you like FPGAs, so I synthesized a FPGA in your FPGA" 07-Oct-20 05:57 PM the more I work on this, the more it looks weird and wrong 07-Oct-20 06:03 PM That meme is better than the last one I came up with 07-Oct-20 06:03 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/4cz0y2-F3ED3.jpg 07-Oct-20 06:04 PM Now what if you got a FPGA with a lot of resources, then implemented a FPGA inside the synthesized FPGA on a FPGA? 07-Oct-20 06:05 PM (RON is short for resistance on, i.e. when driving to the DRAM controller) 07-Oct-20 06:05 PM But reading log files with it over and over just made me think of the memes with that lame looking guy 07-Oct-20 06:58 PM hmmmm 07-Oct-20 06:58 PM https://hackaday.com/2020/06/30/your-own-open-source-asic-skywater-pdf-plans-first-130-nm-wafer-in-2020/ 07-Oct-20 06:58 PM what if you re-did this FPGA design in a HDL and then used some software like Qflow to synthesize and do ASIC floorplanning? 07-Oct-20 06:58 PM open source FPGA chips? 08-Oct-20 08:13 AM @SleepyOwl Joyce one of the things mithro for these runs is an FPGA 08-Oct-20 08:13 AM fwiw I believe there is a pretty active community around this effort on IRC. Mithro was highly encouraging people to work together on this. 08-Oct-20 10:02 AM Isn't there already an open source FPGA? There's one with a completely open software stack. 08-Oct-20 10:02 AM Finals today and tomorrow. On my Circuits I class discord, I mentioned that things were getting down to the wire, oblivious to my own pun. 08-Oct-20 10:02 AM https://tinyfpga.com/ 08-Oct-20 11:25 AM I liked this list when I found a month or so ago https://www.joelw.id.au/FPGA/CheapFPGADevelopmentBoards 08-Oct-20 11:25 AM And this is the main open toolchain with a list of supported boards http://www.clifford.at/icestorm/ 08-Oct-20 11:27 AM @rdpierce all the best! 08-Oct-20 11:28 AM Thanks! 08-Oct-20 11:43 AM Also, I would think tinyFPGA is "open source" in the same way as other tools that have reversed engineered the bitstream of like Xilinx parts 08-Oct-20 12:08 PM Yeah. The Xilinx itself isn't exactly open source, but if the bitstream has been reverse engineered, then you can use whatever tools you want to synthesize designs for it and aren't locked into theirs. 08-Oct-20 12:24 PM As in I don't think there is an open source FPGA and bitstream yet 08-Oct-20 12:24 PM In the sense that the bitstream and other things are made public right from the start 08-Oct-20 08:13 PM Is it just me or are the angles on phasors written as -180 to 180 degrees by convention? 08-Oct-20 08:27 PM it's cause e^(i*pi) 08-Oct-20 09:40 PM Just a little salty. I would have had a perfect score on a challenging EE final, when I already had a perfect score on the midterm, except the question asked for a magnitude and angle. All the lectures, the textbook, etc, uses -180 to 180 but the question asked for 0-360. I missed reading that and entered an answer that was negative but otherwise right. 08-Oct-20 09:40 PM Who asks for angles in that format? 08-Oct-20 09:57 PM Still, A+ for the course so no room to complain. 08-Oct-20 09:57 PM diff eq final is tomorrow. 08-Oct-20 10:07 PM I find my mind wandering over to EV conversions on cars lately. 08-Oct-20 10:17 PM @rdpierce what software was the test taken on? Any TA or prof I know would give that to ya if the software logged answers. 08-Oct-20 10:17 PM (And most seem to, speaking as a TA...) 09-Oct-20 06:31 AM It was Canvas. 09-Oct-20 06:42 AM The question was to convert, say, -8 cos(wt + 25) and it should be 8 cos(wt - 155) but there was text at the bottom I admittedly didn’t read mentioning to convert the angle to a 0-360 number so the only correct answer the test would accept was 8 cos(wt + 205). This was probably the second easiest question on the test. What’s frustrating is that it’s not just testing if you know how to flip the sign by shifting the phase 180 degrees, it’s testing reading comprehension. All the lectures, HW, etc. told us to express angles in the 3rd or 4th quadrant as negative. I can’t think of a single counterexample in the class, which is why I’m salty over it. 09-Oct-20 06:42 AM Then again, I literally didn’t miss a single question on any of the quizzes or midterms, and I got a perfect score on all the homework and labs graded so far, and extra credit on top of that. I was trying to see if I could get through the class with a perfect score. So I’ve still got an A+. 09-Oct-20 07:14 AM Canvas logs answers 09-Oct-20 07:14 AM On all our tests / exams with it, every question gets checked for user error 09-Oct-20 07:14 AM By a TA 09-Oct-20 07:14 AM We’d give that back, engineers might not because engineers 09-Oct-20 08:18 AM I reached out to the instructor. He claims that both conventions are used and he isn’t giving it to me. 09-Oct-20 08:18 AM I wouldn’t be surprised if 3/4 of the class misses that question. 09-Oct-20 08:18 AM It looks identical to our example problems. Putting things into phasor notation by shifting by 90 degrees if the original function is expressed as a sin and 180 degrees if the magnitude is negative. But the examples all used -180 to 180. 09-Oct-20 08:18 AM The question did say 0-360 but everyone is in the habit of doing -180 - 180. Based on how the question is worded, yes, my answer was wrong, but I think it’s unfair to ask about it in this format. It isn’t testing EE knowledge, it’s testing reading comprehension. 09-Oct-20 08:41 AM Well, in my professional experience working with Intel engineers, reading comprehension is pretty valuable 09-Oct-20 08:41 AM Easily half of my job is "social" not technical (problem solving) 09-Oct-20 08:41 AM It's much more tiring than solving all technical issues 09-Oct-20 08:43 AM as I said 09-Oct-20 08:43 AM engineers 09-Oct-20 08:54 AM Oh, I agree. Reading comprehension is important. But presenting what looks like a routine problem and slipping in a nom-routine formatting requirement seems... sneaky... to say the least. It felt like a game of Simon Says. You get people in the habit of doing things, then make a subtle change, and penalize them for doing it the way they’d done it the past dozen times. 09-Oct-20 09:03 AM If there was a single example in the class where we were told to do problems as 0-360 then I’d have no complaint, but there wasn’t. 09-Oct-20 09:07 AM sometimes the answer boxes on our canvas problems have fixed units 09-Oct-20 09:07 AM which aren't SI and sometimes don't even match the ones from the question 09-Oct-20 09:07 AM so you have to convert... 09-Oct-20 09:07 AM That's the sort of situation where I think testing reading comprehension like this should matter 09-Oct-20 09:07 AM And in fairness, with some applications you don't have +2pi continuity 09-Oct-20 11:20 AM heck, helium is cheaper than I expected 09-Oct-20 11:20 AM $900 CAD for a full 5' cylinder of 99.9999% 09-Oct-20 11:25 AM Heh, reminds me of the time we filled some balloons with 99.999% helium at work 09-Oct-20 11:25 AM We ware bleeding some excess pressure from a helium cryostat and had a sense of humor. 09-Oct-20 11:27 AM I've spent more on copper gaskets trying to align my helium beam 09-Oct-20 11:27 AM than I've lost to helium leaks 09-Oct-20 11:47 AM How much is it per sl for this helium? 09-Oct-20 11:47 AM Did you get the quote from airgas? 09-Oct-20 11:48 AM praxair 09-Oct-20 11:48 AM idk, "T size, 2400 PSI" 09-Oct-20 11:48 AM It's the biggest & fullest they sell 09-Oct-20 11:49 AM That's pretty good, it's not a rental tank is it? 09-Oct-20 11:49 AM I think it's a "no monthly cost, but rental" 09-Oct-20 11:49 AM I looked at a few tank rental options and they only charge like 50 cents a day for the tank 09-Oct-20 11:49 AM because it's academic pricing 09-Oct-20 11:49 AM and they assume we're gonna give it back 09-Oct-20 11:50 AM You don't? 09-Oct-20 11:50 AM But I actually think I don't need UHP (99.9999%) helium after all, I'm not running the cold head 24/7, and the 99.9% stuff may be good enough 09-Oct-20 11:52 AM 99.995 is the worst I've seen for that 09-Oct-20 11:53 AM Also the cryocooler compressor in my FLIR camera works, judging from the fact that it self regulates from 35W down to 15-20W after 2 minutes of cooling, I think it can go down to temp 09-Oct-20 11:53 AM Airgas has more options, the local store actually need to specially order UHP helium 09-Oct-20 11:53 AM But the problem is I can't see any data going out from the camera 09-Oct-20 11:55 AM even praxair special orders uhp helium 09-Oct-20 11:55 AM they stock like 2 bottles in vancouver and bring some from edmonton every month if they sell any, it seems 09-Oct-20 11:56 AM WE used "five nines" Helium for our helium cryostats 09-Oct-20 11:56 AM And we and our customers ran them essentially 247 09-Oct-20 11:57 AM I'm not running it 24/7, I doubt the cold head is in that good of a condition anyway 09-Oct-20 11:57 AM I think 5.0 is what's recommended 09-Oct-20 11:57 AM Did a bit of a tear down and it looks like there are some residues in there 09-Oct-20 11:57 AM but 4.5 is used frequently 09-Oct-20 11:57 AM and 6.0 is pointlessly overkill 09-Oct-20 11:58 AM I also probably have an absorber that desperately needs to be changed 09-Oct-20 11:58 AM You can hear it when it's not happy right? I'll slap a pressure gauge directly on the outlet, and I think I should see it when there's something incompressible in the cold head 09-Oct-20 11:59 AM they always sound unhappy? 09-Oct-20 11:59 AM the stupid f-70L design has a huge resonating piece of sheet metal 09-Oct-20 11:59 AM I had to add a weight to dampen that 09-Oct-20 12:00 PM Ah you should hear the compressor in the FLIR camera's FPSC stirling engine, pure ASMR 09-Oct-20 12:00 PM I'm glad I didn't get the big Leybold cryopump, helium alone for that would cost an arm and a leg 09-Oct-20 12:00 PM Definitely want four 9s and replace the absorber for that thing 09-Oct-20 12:00 PM But one stage cryopumps are like $300 on eBay, and it's probably cheaper to repair/replace the cryopump (unlikely when used rarely) rather than do all the proper maintenance... 09-Oct-20 02:01 PM Peak helium.... just gonna set that little hand grenade out there and pull the pin. Hahaha.. so we switch to liquid hydrogen there after and put the machines out in the open to vent? 09-Oct-20 02:01 PM Sooner or later helium will go beyond reasonable prices 09-Oct-20 02:13 PM Heeey, really convenient that funranium is here 09-Oct-20 02:13 PM Just came across this https://cdn.discordapp.com/attachments/424394851170385923/733845940116521011/video0.mov 09-Oct-20 02:13 PM Doing this apparently gets you banned from styropyros discord. 09-Oct-20 02:13 PM feat. radium. 09-Oct-20 02:13 PM And an idiot. 09-Oct-20 02:14 PM oh jeez, what on earth were they trying to do 09-Oct-20 02:14 PM what exactly is that? 09-Oct-20 02:14 PM it looks like a radium clock 09-Oct-20 02:15 PM What is he trying to demonstrate? 09-Oct-20 02:15 PM Is he trying to mutate himself? 09-Oct-20 02:16 PM apparently they ware displeased with people telling them not to play around with radium and causing contamination. 09-Oct-20 02:16 PM So to spite people they at least play out eating radium. 09-Oct-20 02:16 PM So idiot kid I guess? 09-Oct-20 02:16 PM sometimes stupidity corrects itself 09-Oct-20 02:17 PM The problem with kids is that they don't live alone 09-Oct-20 02:17 PM Seems to be more than abundant on Styropyro's server 09-Oct-20 02:17 PM so there's some bystanders in that house. 09-Oct-20 02:19 PM [facepalm] 09-Oct-20 02:19 PM I wouldn’t think I’d have to say “Don’t eat the fluffy, enticing radium paint” to anyone here but, just in case, there, I said it. 09-Oct-20 02:23 PM Radium spa soap 09-Oct-20 02:23 PM radioactivity gives you heath! 09-Oct-20 02:23 PM I wish I merely jest, but at some point in history... 09-Oct-20 02:26 PM the worst thing I ever did with radium as a kid was hold it up to an image intensifier as a pretty light show 09-Oct-20 02:26 PM learning about its affinity for bones was enough to keep that the most intrusive experiment 09-Oct-20 02:26 PM that and, easy availability of tritium lamps to satisfy my desires 09-Oct-20 02:28 PM I wouldn't know how to store, handle and dispose of radioactive stuff 09-Oct-20 02:29 PM look at the bright side 09-Oct-20 02:29 PM now we know that even styropyro has limits 09-Oct-20 02:29 PM Radium spa soap @SleepyOwl Joyce if only you knew how this stuff was used in the past... 09-Oct-20 02:29 PM toothpaste! 09-Oct-20 02:29 PM Drinking water! 09-Oct-20 02:29 PM everything 09-Oct-20 02:29 PM https://carlwillis.wordpress.com/2017/02/03/a-nuclear-jockstrap/ 09-Oct-20 02:30 PM I know of the history 09-Oct-20 02:30 PM Most Health Physicists have a decent collection of the quackery objects. All I have is modern thoriated cock ring. 09-Oct-20 02:30 PM I need to up my game. 09-Oct-20 02:31 PM slowly backs away 09-Oct-20 02:31 PM I can send you some of those anti radiation cards 09-Oct-20 02:31 PM https://www.youtube.com/watch?v=_NY0MTNRngY 09-Oct-20 02:32 PM [shakes angryfist] Stupid scalar energy neo-quackery. And no I don’t want to to sweep up some swarf off the machine shop floor to make me an orgone collector either. 09-Oct-20 02:32 PM Actually I was thinking about that 09-Oct-20 02:32 PM I have an abundance of al chips 09-Oct-20 02:32 PM but apparently you need to use copper because Al has the wrong resonance and shorts something out 09-Oct-20 02:33 PM AAAAAAAAAAAAAAAA 09-Oct-20 02:33 PM Wait, those cards give beta radiation? 09-Oct-20 02:33 PM alpha, beta and gamma 09-Oct-20 02:33 PM They sure do. 09-Oct-20 02:33 PM alpha is the most fun, as that means the radioactive stuff is on the surface and not in the paint 09-Oct-20 02:34 PM “Scalar energy” to cancel out the bad radiation. 09-Oct-20 02:34 PM those things really like to contaminate everything they touch 09-Oct-20 02:34 PM anti radiation cards that give off ionizing radiation? 09-Oct-20 02:34 PM I do get a nice 511 keV peak so I guess they do contain a bit of anti radiation 09-Oct-20 02:34 PM THAT SAID, they’re handy check sources. Other than the contamination problem. 09-Oct-20 02:34 PM keep 'em in a zip lock bag and you're fine 09-Oct-20 02:34 PM ish 09-Oct-20 02:34 PM These nano energy wand/pens are also radioactive too: https://www.amazon.com/gp/product/B085MYKN1G/ref=crt_ewc_title_dp_3?ie=UTF8&psc=1&smid=A1I3IXO8N3UD0E 09-Oct-20 02:35 PM So are bananas :P 09-Oct-20 02:35 PM aren't those the ones where they just gave up and filled 'em with ThO2 powder? 09-Oct-20 02:35 PM Yep 09-Oct-20 02:36 PM What does ThO2 give off though? 09-Oct-20 02:36 PM Amazon’s product safety team is not on Phil’s Happy List. Tore some of their engineers a new one in Vegas a few years back. They were polite enough to shuffle their feet and look guiltily at the floor. “We could fix it tomorrow if we were allowed.” 09-Oct-20 02:36 PM Tbh I now am curious 09-Oct-20 02:36 PM I could probably find some used counter at a scientific equipment recycler 09-Oct-20 02:36 PM Take it out to stores and places selling minerals and other sorts of jazz for health 09-Oct-20 02:38 PM it's always a great Idea to get a counter 09-Oct-20 02:38 PM And see if I can find radioactive stuff 09-Oct-20 02:38 PM I think I spotted some scintillators as well 09-Oct-20 02:38 PM Not sure if they're still there 09-Oct-20 02:38 PM In any case 09-Oct-20 02:38 PM It would be interesting to see how many so called health products and items like the pen shown above made it to stores, etc 09-Oct-20 02:41 PM what was that scintillation detector you despise @funranium ? 09-Oct-20 02:41 PM right, the mini-monitor 09-Oct-20 02:41 PM That’s the one. And it’s a GM. 09-Oct-20 02:42 PM that's a good counter for general purpose detection 09-Oct-20 02:42 PM are you sure it's gm? 09-Oct-20 02:42 PM are there different detectors for it? 09-Oct-20 02:42 PM Yes 09-Oct-20 02:42 PM huh 09-Oct-20 02:42 PM The scints are more reliable. This is relative of course. 09-Oct-20 04:39 PM Woot! 8/8 on my diff eq final! 09-Oct-20 04:39 PM No more classes! Yay! 09-Oct-20 04:39 PM (until two new classes start Monday.) 09-Oct-20 04:39 PM (Signals & Systems, Linear Algebra) 09-Oct-20 04:47 PM nice! 09-Oct-20 05:28 PM Congrats! 09-Oct-20 05:55 PM I will never forget getting yelled at in Diff Eq for solving a projectile motion problem with "physics, instead of math". I had an F at first. professor was forced to change it to an A because my answer was correct even if she didn't like my methodology. 09-Oct-20 11:25 PM lol my hydro bill for the last two months 09-Oct-20 11:25 PM averaged less than 1 kwh per day 10-Oct-20 01:04 AM tfw 10-Oct-20 01:04 AM https://carlwillis.wordpress.com/2017/02/03/a-nuclear-jockstrap/ @GigaSquirrel tfw 10-Oct-20 01:05 AM yep 10-Oct-20 01:05 AM sick 10-Oct-20 01:05 AM the blue light 10-Oct-20 01:06 AM there is no graphite blue light you are delusional 10-Oct-20 01:06 AM is it visible to the naked eye or is it long exposure magic? 10-Oct-20 01:06 AM the latter I guess 10-Oct-20 01:06 AM I hope 10-Oct-20 01:06 AM hm ok 10-Oct-20 01:06 AM but scary enough 10-Oct-20 01:07 AM Yep... 10-Oct-20 01:07 AM ionized air glow, dear god 10-Oct-20 01:07 AM but it's so pretty 10-Oct-20 01:08 AM it is 10-Oct-20 01:08 AM I just would never get itanywhere close the original use place 10-Oct-20 01:08 AM to be fair it's hot enough that I would not really want it at all 10-Oct-20 01:09 AM yeah, it's hot enough and probably spewing contamination everywhere 10-Oct-20 01:10 AM imagine gentle breeze of Rn coming off of it 10-Oct-20 01:37 AM just leave it on an x-ray screen and it glows in a dark room 10-Oct-20 01:37 AM i /really/ like ben k's electron source, would rather have that than radioactive sources at this point 10-Oct-20 07:18 AM Doing DiffEq at the same time as Circuits I was fun. 10-Oct-20 07:18 AM The two complemented each other perfectly. Like, we learned 2nd order stuff (overdamped, underdamped, critically damped) just in time to use it for RLC transient analysis. 10-Oct-20 07:18 AM Then DiffEq taught us Laplace transforms, and they showed up in the last week of circuits. 10-Oct-20 07:18 AM This half semester was really kind of cool because I’ve got so much practical experience in electronics but none of the theory. So it was lots of eureka moments. 10-Oct-20 07:18 AM Like I had no idea what Pole/Zero on a spectroscopy amp did. 10-Oct-20 07:18 AM I just knew it was something to twiddle while watching an oscilloscope to get the baseline back to zero. 10-Oct-20 07:18 AM Now, I’m like, OHHHHH, I’m actually causing the circuit to go between overdamped and underdamped, and turning to be critically damped. 10-Oct-20 07:18 AM Or the time when I was troubleshooting a SEM quad backscatter preamp. 10-Oct-20 07:18 AM The amp board in the SEM provided the preamp with, say, +20/-20V rails. 10-Oct-20 07:18 AM The preamp has linear regulators to take them down to, say, +15/-15V which became the rails for the rest of the thing which was lots-o-op-amps. 10-Oct-20 07:18 AM The negative rail was wonky. It looked like it was being pulled up positive. 10-Oct-20 07:18 AM So I unplug it, check it with a multimeter. The SEM is providing good +/- 20V. 10-Oct-20 07:18 AM It turns out the amp board had small resistors, on the order of 15 ohms, in series with the power output. The resistor on the negative line had melted. 10-Oct-20 07:18 AM Very high, but non-zero, resistance. 10-Oct-20 07:18 AM So when we got to Thevenin equivalent circuits, I had a good frame of reference for understanding it. I was measuring an open circuit voltage, but the high Rth was the reason the voltage changed once a load was put on it. 10-Oct-20 07:45 AM https://cdn.discordapp.com/attachments/513191263894372352/764472838597902346/image0.png 10-Oct-20 12:45 PM latest sketch of coffee roaster 10-Oct-20 12:45 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/DSC_2095-E54C5.jpg 10-Oct-20 12:45 PM hopper, roasting chamber, chaff colleector, output cooling basket, exhaust gas recirculation... 10-Oct-20 12:45 PM could have mutiple hoppers, for different beans if making a blend (which you dont/cant roast at the same time due to different properties) 10-Oct-20 12:45 PM so.. what kind of flanges are we voting for? 10-Oct-20 12:54 PM I mean if your bucket of money is big 10-Oct-20 12:54 PM conflat 10-Oct-20 12:54 PM but really, IDk what works well for positive pressures besides ansi/asa 10-Oct-20 12:58 PM also, the plan will be to make most flanges myself 10-Oct-20 12:58 PM and, I wonder if it can easily be done in reverse, ie, have a vacuum instead of a blower 10-Oct-20 12:58 PM also, gotta figure out appropriate sizes.. I dont suspect I would be roasting more than a kilo at a time 10-Oct-20 01:05 PM https://discordapp.com/channels/513115950501855256/514721733626822666/764498838584164382 But helium is endothermic in fission 10-Oct-20 04:32 PM ok so I can't align a 2mm aperture 10-Oct-20 04:32 PM kind of got a 3mm aperture 10-Oct-20 04:32 PM and now my 5mm aperture seems perfect 11-Oct-20 02:12 AM @Noxz For positive pressures capable flange I would vote for "Triclamp". It is similar to KF and quite widely used in food/chemic industry... 11-Oct-20 08:30 AM like on pressure cookers and autoclaves 11-Oct-20 08:30 AM there really wont be positive preessure though, as it will always be exhausted 11-Oct-20 08:30 AM like, kind of, but not really 11-Oct-20 08:40 AM That’s used a lot in brewing. Sometimes called tri-clover, or sanitary clamp. 11-Oct-20 09:17 AM oh, just looked them up, yeah, they look more like KF than what I was imagining 11-Oct-20 09:17 AM if I can do a bolt connection, then I wont have to buy clamps, beecause good luck making them 11-Oct-20 09:17 AM I am sure they are cheap enough, but still 11-Oct-20 10:56 AM The tri clover clamps are dirt cheap in smaller sizes. 11-Oct-20 10:56 AM You can buy weld on connectors. I’ve also found solid copper connectors but those were expensive.... 11-Oct-20 10:56 AM I’ve done work for a licensed micro distillery. Just about everything there is tri-clover. 11-Oct-20 11:39 AM @rdpierce Exactly, my father worked in company which produced some "reactors" for pharmaceutical companies and triclamp was also default choice... 11-Oct-20 12:07 PM so, I guess price isn't the concern as: I want to machine things [as more practice] 11-Oct-20 12:07 PM welding is certainly an aspect of the project (Looking at the Eastwood TIG AC/DC 200, maybe digital version) 11-Oct-20 12:07 PM but, if I can make the flanges myself (maybe triclamp flanges are simpl enoughe, but the clamps themselves not so) then that is a step in the direction I want to go? 11-Oct-20 12:07 PM I guess I haven't quite figured out what I want to get out of this project 11-Oct-20 12:07 PM beyond roasted coffee 11-Oct-20 12:07 PM drilling/tapping holes around a turned flange isnt exactly rocket science 11-Oct-20 12:07 PM also, I added a second+ hopper into the roasting chamber and an auger upfeed from the cooling chamber so you dont have to actually bend low (the whole machine will essentially be no higher than 2.5ft from the floor) to get the roasted coffee .. General idea is if you are making a blend you can sequentially (automated) go from one kind of bean to the other and join them all in a basket in the end 11-Oct-20 12:07 PM and yeah, likely no more than a kilo at a time, especially when first learning temps and whatnot, quick tests (daily amounts) are what is needed, not a bad roast you gotta sit through for a whole week+ or throw away 11-Oct-20 12:07 PM iirc my daily ground espresso shots are ~30g 11-Oct-20 02:33 PM Hmmmm. I womder if vapors from this HCL bottle leaked out. Hahaha. Now i have lots of ferric oxide! 11-Oct-20 02:33 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_8821-4226E.jpg 11-Oct-20 02:34 PM eep 11-Oct-20 02:42 PM yeah, I have a bottle of muriatic in a cardboard box.. the lid of thee cardboard box crumbles if you touch it 11-Oct-20 02:42 PM my other bottle is sealed a bit better 11-Oct-20 02:42 PM the entiree box of stuff belonged to someone else 11-Oct-20 02:42 PM and I tried not to touch it, but he is no longer in this country, so... yeah 11-Oct-20 03:46 PM Oh yeah you need to keep that stuff well sealed 11-Oct-20 03:46 PM Iodine does the same thing 11-Oct-20 03:46 PM Rusts your cabinet and all your tools 11-Oct-20 04:00 PM and your leak valves D: 11-Oct-20 06:04 PM I keep the liter I have stored inside a secondary container full of baking soda to capture vapor 11-Oct-20 10:02 PM kek 11-Oct-20 10:02 PM nightmare 12-Oct-20 06:56 AM @Noxz if you’re looking for things to machine, by all means, have fun, but I’d personally prefer to buy the ferrules. 12-Oct-20 06:56 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/image0-1648A.png 12-Oct-20 06:56 AM They’re very similar to KF. 12-Oct-20 06:56 AM The biggest difference is that they have a groove to accommodate the spacer gasket. 12-Oct-20 06:56 AM If you really want practice in machining these, and can make 3” copper flanges for less than I’m paying, we should talk.... 12-Oct-20 06:56 AM Stainless ones can be had dirt cheap. 12-Oct-20 10:21 AM stainless gaskets or flanges 12-Oct-20 10:28 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/EkGQvbkXkAUznBh-884B2.png 12-Oct-20 11:06 AM BIG MT from Old World Blues will always be the fictional New Mexico research facility of my heart. 12-Oct-20 11:06 AM hl > fallout 12-Oct-20 11:06 AM I'm sorry, but that's a fact 12-Oct-20 11:07 AM Both have Questionable Ethics 12-Oct-20 11:08 AM But that's a given in the role of New Mexico research facility ™️ 12-Oct-20 11:16 AM gives LANL serious side-eye 12-Oct-20 11:16 AM they've definitely been there, not sure what they're up to nowadays 12-Oct-20 11:16 AM ok 12-Oct-20 11:16 AM so 12-Oct-20 11:16 AM https://www.ebay.com/itm/233742801231 12-Oct-20 11:16 AM I'll assume that's tungsten 12-Oct-20 11:16 AM right? 12-Oct-20 11:23 AM Likely. Uranium metal isn’t friendly for a sales kit like this is. 12-Oct-20 11:28 AM it wouldn't be the first time someone sold that on ebay 12-Oct-20 11:28 AM or, tried to 12-Oct-20 11:50 AM DU used to come up fairly often 12-Oct-20 11:50 AM Has been awhile since I have seen any besides some possible sketchy scrap metal listings that disappeared when I messaged the sellers 12-Oct-20 11:52 AM yeah... 12-Oct-20 11:52 AM but U tarnishes quickly in air 12-Oct-20 11:54 AM Yeah hopefully that display is not actually U. Can't imagine that many coatings would manage to keep it so nice and shiny long term. 12-Oct-20 11:54 AM yep 12-Oct-20 11:54 AM 'tho I would give a lot for a U chunk that size... 12-Oct-20 11:54 AM one of the haigerloch cubes... 12-Oct-20 11:54 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/Uranwuerfekl-3DF98.png 12-Oct-20 12:32 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/image0-5FA12.jpg 12-Oct-20 12:32 PM I’m doing glovebox work today. 12-Oct-20 12:32 PM The only thing more metal than sandblasting metal is blasting Eluveitie while sandblasting metal. 12-Oct-20 12:35 PM so you're blasting metal while blasting metal 12-Oct-20 12:35 PM man it's been a long time since I listened to eluveitie 12-Oct-20 09:15 PM Eluveitie rocks. 12-Oct-20 09:15 PM When a band reconstructs ancient Gaulish to write death metal lyrics, that is peak awesome. 12-Oct-20 09:15 PM And they have a hurdy gurdy. ‘Nuff said. 12-Oct-20 09:31 PM spends 30 mins trying to drill a hole into a metal box and fails, having depleted her drill battery 12-Oct-20 09:31 PM asks colleague: "What material is our box made of?" Colleague: "Stainless steel" 12-Oct-20 09:31 PM I cri 12-Oct-20 09:31 PM I don't think I managed to go beyond the surface of the metal 12-Oct-20 09:31 PM I am thinking of going to the hardware store and getting some cobalt coated drill bits 12-Oct-20 09:51 PM lol 12-Oct-20 09:51 PM Made an undergrad drill 10 1/4” holes in 3/16” steel walled tubes last summer 12-Oct-20 09:51 PM It took him a week with our cordless drill because it kept dying 12-Oct-20 09:51 PM Ten 1/4, not 10”... 13-Oct-20 09:30 AM You need a drill press. 13-Oct-20 09:30 AM Stainless steel can work harden. 13-Oct-20 09:30 AM You want to cut it aggressively. 13-Oct-20 09:30 AM no 13-Oct-20 09:30 AM I need to pay someone else to do it for me 13-Oct-20 09:30 AM I mean - doing this stuff takes time off engineering and development work 13-Oct-20 09:31 AM Well you may also need a new box. If you’ve unsuccessfully tried to drill it, you’ve probably work hardened it. 13-Oct-20 09:32 AM new box is not an option 13-Oct-20 09:32 AM I’ve had a nightmare drilling into stainless beer kegs. 13-Oct-20 09:32 AM so basically we tried to cheap out 13-Oct-20 09:32 AM instead of making new boards 13-Oct-20 09:32 AM we salvaged some from a previous customer that stopped using our solutions 13-Oct-20 09:32 AM the holes are meant for the board to be mounted on 13-Oct-20 09:32 AM there's just one problem 13-Oct-20 09:32 AM the old boards are identical EXCEPT with the mounting hole placement 13-Oct-20 09:32 AM so what did they get the factory to do? 13-Oct-20 09:32 AM epoxy some plastic standoffs to the case 13-Oct-20 09:32 AM except it came off during shipping 13-Oct-20 09:32 AM and the board is flapping around in the case 13-Oct-20 09:32 AM customer shipped it back to us and now I am the one who has to salvage this somehow 13-Oct-20 09:32 AM new box isn't an option cause making new ones cost and it takes a lot of time 13-Oct-20 09:32 AM so what I have done 13-Oct-20 09:32 AM is to go out to the hardware store 13-Oct-20 09:32 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/20201014_003448-54C28.jpg 13-Oct-20 09:32 AM cobalt drill bits 13-Oct-20 09:32 AM tomorrow morning I'll work on this 13-Oct-20 09:32 AM and see if this helps 13-Oct-20 09:32 AM I think it should work 13-Oct-20 09:32 AM or I cri and ask myself where in my career went horribly wrong 13-Oct-20 09:32 AM all our stuff is jerry rigged in some way, shape or form 13-Oct-20 09:44 AM Advice: use a corded drill. Don’t even think of cordless. 13-Oct-20 09:44 AM Use a center punch so the drill bit doesn’t wander. 13-Oct-20 09:45 AM already punched 13-Oct-20 09:47 AM Apply more force than usual. Normally you want the drill to set the speed, but here, the goal is to make a large chip, as making a small chip will work harden the stainless. You will dull the drill bits and will need to replace them when they start cutting slow. If you are just spinning in place without making a chip, stop, you’re just work hardening the metal, get a new drill. 13-Oct-20 09:47 AM I see 13-Oct-20 09:48 AM A drill press really is the right tool for this. You have a lever and can regulate the force on the bit. 13-Oct-20 09:48 AM Well, ok, a fiber laser may be a better tool. 13-Oct-20 09:48 AM well, we had access to one - until we got evicted from our office and are permanently working from home 13-Oct-20 09:48 AM so I only have the bare basics on hand 13-Oct-20 09:49 AM If you already work hardened the surface of the hole you will need to be fairly aggressive when getting the drill bit started 13-Oct-20 09:50 AM Yes, which is why I really think a drill press may be necessary. 13-Oct-20 09:50 AM in our case 13-Oct-20 09:50 AM it was a big welded frame 13-Oct-20 09:50 AM 0 chance getting it in a drill press 13-Oct-20 09:50 AM it should have been drilled before welding, obviously. 13-Oct-20 09:51 AM Stainless is just a really frustrating material to work with unless you have tools that are large enough and rigid enough 13-Oct-20 09:51 AM If you had a drill press available sometimes the solution for work hardened holes is to stick a carbide endmill in the chuck and just barely touch off in the bottom of the hole before swapping back to the drill 13-Oct-20 09:53 AM looks at her next biggest drill 13-Oct-20 09:53 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/616jyoBimGL-390CA.png 13-Oct-20 09:53 AM this is a comically large drill for this job 13-Oct-20 09:55 AM Actually no. With stainless, you are locked in a life or death struggle. You want every advantage you can get. 13-Oct-20 09:55 AM That looks like it may also be a hammer drill. Just make sure it isn’t set to hammer mode. 13-Oct-20 09:55 AM is told to use a drill press thinks a hand drill is comically large 13-Oct-20 09:55 AM I mean, in terms of a hand drill 13-Oct-20 09:55 AM but that's all I have on hand 13-Oct-20 09:55 AM either the cordless drill or this 13-Oct-20 09:56 AM How large is the box? 13-Oct-20 09:57 AM 189 mm x 155 mm x 42 mm 13-Oct-20 09:57 AM Don’t even think of the cordless. They don’t have the power needed, at least not for long. 13-Oct-20 09:57 AM Ah so pretty small. Do you have a scrap of hardwood around? Drilling through that and using it to keep the hand drill mostly square to the surface might help a bit 13-Oct-20 09:58 AM Ehhh.... then you can’t see the chips. 13-Oct-20 09:59 AM True. When drilling stuff I usually go by how much progress I can feel and not the chips but I have been doing this stuff for awhile 13-Oct-20 09:59 AM Depends if they're just muscling through or not 13-Oct-20 09:59 AM Yeah.... with stainless you really need to know if you’ve stopped making chips. 13-Oct-20 10:02 AM the 10 holes I mentioned took one battery charge per hole 13-Oct-20 10:03 AM orders a set of 10 drill batteries 13-Oct-20 10:03 AM battery runs out 13-Oct-20 10:03 AM RELOAD, RELOAD! 13-Oct-20 10:18 AM Idealy 10 drill bits too 13-Oct-20 10:19 AM but basically 13-Oct-20 10:19 AM I cri 13-Oct-20 11:46 AM Seconding corded drills. They have A LOT more oomph behind them 13-Oct-20 11:49 AM heh, misread that as corroded drills 13-Oct-20 11:49 AM acid floodcooling 13-Oct-20 11:49 AM https://www.creare.com/r-d-services/fluid-and-thermal-systems/img-03-037-2/ 13-Oct-20 11:49 AM !!! 13-Oct-20 12:11 PM Yeah those creare turbos are really cool they show up a lot in portable mass spec papers 13-Oct-20 12:14 PM beautiful 13-Oct-20 12:16 PM so cute 13-Oct-20 12:27 PM Oh that's dope 13-Oct-20 12:27 PM What machines have you seen them in? 13-Oct-20 12:30 PM adorable 13-Oct-20 12:44 PM This paper tried a bunch of the different creare pumps 13-Oct-20 12:44 PM https://link.springer.com/article/10.1007/s13361-014-1026-5 13-Oct-20 12:44 PM so many tiny pumps 13-Oct-20 12:44 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/image0-CC66D.png 13-Oct-20 05:14 PM @adammunich Two of those Creare pumps are on the Curiosity rover on Mars right now, which is something incredible honestly. Unfortunately Perseverance doesn't have that mass spec 13-Oct-20 05:14 PM They exhaust directly to atmosphere with a drag stage, compression ratio is enough 13-Oct-20 05:18 PM mars atmosphere i assume 13-Oct-20 05:19 PM Yeah 13-Oct-20 05:20 PM i wonder what pumps are used in the desktop TSA sniffers, if any 13-Oct-20 05:24 PM They are just a mass spectrometer like an RGA right? Do they make gas sampling machines that are desktop sized? 13-Oct-20 05:25 PM i think they use a couple different machines, some mass spec, others ion mobility spec 13-Oct-20 05:25 PM Also Creare is known for their turbo-brayton cryocoolers, some really neat parts shown in this presentation: https://rps.nasa.gov/internal_resources/153/ 13-Oct-20 05:25 PM i usually get sniffed as I always have circuit boards or something weird when i travel lol 13-Oct-20 05:25 PM they get really freaked out when you ask if that's a mass spectrometer 13-Oct-20 05:27 PM It could be just pumped by an ion pump and the entire mass spec flight path could maintain high vacuum... Some hand held helium leak detectors uses increased helium ion mobility across a heated quartz tube to selectively detect helium in concentrations ~10 ppm, but to generalize to all gases/explosive content, I think a mass spec must be used 13-Oct-20 05:27 PM https://en.wikipedia.org/wiki/Puffer_machine 13-Oct-20 05:27 PM they are apparently not buying new ones anymore as they proved to be unreliable 13-Oct-20 05:28 PM I think the ion mobility spectroscopy detectors doesn't sample gas, they use swabs like this one: https://www.smithsdetection.com/products/ionscan-500dt-2/ 13-Oct-20 05:28 PM yeah often they use a felt pad 13-Oct-20 05:28 PM then, presumably bake it 13-Oct-20 05:28 PM https://www.ebay.com/itm/Smiths-Ionscan-LS/172830510113?hash=item283d804c21:g:6v4AAOxyyq5TNd7v 13-Oct-20 05:28 PM huh this has a trefoil sticker 13-Oct-20 05:34 PM They might use a small Am-241 source to ionize the sample molecules 13-Oct-20 05:43 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/unknown-2D5EE.png 13-Oct-20 05:43 PM at atmospheric pressure? 13-Oct-20 05:43 PM this is actually pretty neat it might be a technique we can use to identify illegal polluters in oakland 13-Oct-20 05:43 PM https://en.wikipedia.org/wiki/Atmospheric-pressure_chemical_ionization 13-Oct-20 05:47 PM wow... so... this theesis I've had for a while (on hydrostatic tool spindles), was written while employed by Creeare 13-Oct-20 05:47 PM I have 3 main refs for the topic, that thesis, a chapter from the book from his MIT mech Eng professor, and a ASME publication on the Fundamentsl of the Design of Fluid Film Bearings 13-Oct-20 06:02 PM I have a goal of making such a spindle for the boring head of hopefully the smaller watchmaker jig borer that's auction is ending tomorrow 13-Oct-20 06:57 PM The swan ones are what I have seen in use. 13-Oct-20 06:57 PM Swab not swan 13-Oct-20 07:19 PM There's a lot of really cool atmospheric ionization techniques 13-Oct-20 07:27 PM DART is the one I've seen most, discharge based where they flow helium/n2 mixture through then it hits sample and ionizes it. 13-Oct-20 07:27 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/images.squarespace-cdn.com-C9C8D.jpg 13-Oct-20 07:27 PM this picture cracks me up lol 13-Oct-20 08:09 PM RE: stainless steel drilling 13-Oct-20 08:09 PM so I am doing it with cobalt bits now 13-Oct-20 08:09 PM and I am seeing chips 13-Oct-20 08:09 PM but very very fine chips 13-Oct-20 08:09 PM and I have been at it since 40 mins ago 13-Oct-20 08:09 PM no hole yet 13-Oct-20 08:43 PM oops 13-Oct-20 08:43 PM didn't correct one dimension in my CAD file 13-Oct-20 08:43 PM had the shop make something that needs to be shortened 13-Oct-20 08:47 PM calls contact 13-Oct-20 08:47 PM asks if she can go back to borrow a drill press 13-Oct-20 08:54 PM What grade stainless, what thickness, and what hold diameter? 13-Oct-20 08:55 PM no clue, 2mm, 3mm 13-Oct-20 08:58 PM Probably 304? 13-Oct-20 08:58 PM my general feeling is that you will just have to brute force this with how much it has likely been work hardened already. 13-Oct-20 08:58 PM slow speed, lots of pressure, and some luck if you need the hole to not be egg shaped 13-Oct-20 09:01 PM colorful language 13-Oct-20 09:01 PM in any case I am contacting the machine shop at the office I used to be at 13-Oct-20 09:01 PM asking if they can do me a favor 13-Oct-20 09:13 PM hmmmm 13-Oct-20 09:13 PM what if I buy my own drill press? 13-Oct-20 09:13 PM no space for it 13-Oct-20 09:13 PM darn 13-Oct-20 09:15 PM Won't you have a CNC mill soon? 13-Oct-20 09:16 PM yeah - it comes today 13-Oct-20 09:16 PM and honestly it's not ideal in terms of storage 13-Oct-20 09:17 PM Can you not use it to bore that hole? 13-Oct-20 09:17 PM 3018 CNC 13-Oct-20 09:17 PM With a small carbide end mill and a fast spindle like what you've got, it should be just fine 13-Oct-20 09:17 PM I am not exactly sure a cheap CNC like this will work will it? 13-Oct-20 09:18 PM The spindle is weaker and slower than I expected, but try with a 2mm diameter carbide endmill, double or single flute 13-Oct-20 09:18 PM If the part will fit on this tiny router that is 13-Oct-20 09:19 PM we'll see 13-Oct-20 09:19 PM I'll probably just hop over to the machine shop if they let me 13-Oct-20 09:19 PM I wonder though 13-Oct-20 09:19 PM if I should do this mod 13-Oct-20 09:19 PM https://www.youtube.com/watch?v=_qTjYUyNpGs 13-Oct-20 09:24 PM Probably not worth it... The whole thing is not rigid anyway and there will be chatter no matter what with CNCs made from hollow aluminum profiles 13-Oct-20 09:24 PM I'd recommend first filling the major load bearing aluminum profiles with epoxy concrete or something that dampens the vibration, then think about a spindle upgrade later if you end up machining a lot of metal 13-Oct-20 09:25 PM fair 13-Oct-20 09:25 PM Don't use acrylic or plastic to mount your spindle like this guy did 13-Oct-20 10:06 PM An end mill will probably cut better than a drill bit. 13-Oct-20 10:10 PM Just go really fast in rpm and have a shallow depth of cut 13-Oct-20 10:49 PM if you have access to the other side of the place you were already trying to drill you could give the hand drill one more try there and hope the work hardening is just in the already drilled other side 13-Oct-20 10:49 PM my vote is for begging/borrowing a drill press though 13-Oct-20 10:49 PM of course now that I have some extra cash for the first time in awhile all the lathes on the market locally are crap... guess i can put that off awhile longer. just have to decide what project to throw this money at... 13-Oct-20 11:19 PM @SleepyOwl Joyce If you buy/borrow drill press, don't forget some cutting fluid! Even standard WD40 is better than nothing, but having something labeled "cutting fluid" is usually even better. And as everyone said - slow RPM, maximal downforce. If nothing happens in few seconds, no need to continue for 40 minutes - no chips within few seconds usually mean that your drill bit got dull... 13-Oct-20 11:44 PM @bkralik oh yes, I have been putting some WD40 on the piece 14-Oct-20 04:29 PM https://www.quantamagazine.org/physicists-discover-first-room-temperature-superconductor-20201014/ 14-Oct-20 05:08 PM diamond anvil cells are great for clickbait headlines 14-Oct-20 05:08 PM anything's possible with enough gigapascals 14-Oct-20 05:23 PM That is interesting but also doesn't seem very useful 14-Oct-20 05:23 PM "The superconducting state is observed over a broad pressure range in the diamond anvil cell, from 140 to 275 gigapascals" oof 14-Oct-20 06:52 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/1602726735573-D1CEE.jpg 14-Oct-20 07:13 PM yikes 14-Oct-20 07:13 PM I cannot even go back to the machine shop thanks to strict COVID-19 distancing rules 14-Oct-20 07:36 PM my own engineers cannot even go back because of Zoning rules 14-Oct-20 07:36 PM hmmmm 14-Oct-20 08:28 PM covid means there aren't any undergrads clogging our workshops 14-Oct-20 08:28 PM no line for lasercutter or waterjet 14-Oct-20 08:35 PM ngl the fact that it's still summer congestion on campus is pretty great 14-Oct-20 08:35 PM Though I do feel for them because they're paying for the most expensive video streaming service ever 14-Oct-20 08:36 PM we're using "collaborate ultra" and zoom 14-Oct-20 08:38 PM Honestly, I have no idea what they use in addition to zoom 14-Oct-20 08:39 PM I think we're good for money 14-Oct-20 08:39 PM Anyway, I can get chick fil a at like 2 PM with no line 14-Oct-20 08:39 PM And it's great 14-Oct-20 08:39 PM there's extra enrolments 14-Oct-20 08:40 PM I think we're relatively okay finances wise 14-Oct-20 08:40 PM They're in dorms and enrolled 14-Oct-20 08:40 PM No idea on the exact numbers 14-Oct-20 09:04 PM asks the the local hackerspace 15-Oct-20 12:13 AM bummer 15-Oct-20 12:13 AM the Hackerspace here might be shutting down 15-Oct-20 12:13 AM I expected it to happen but darn 15-Oct-20 12:14 AM for good or just during covid? 15-Oct-20 12:16 AM For good I think 15-Oct-20 12:16 AM they are having funding issues 15-Oct-20 12:29 AM it's pretty expensive to run a hackerspace here 15-Oct-20 12:29 AM even the membership fees are pretty steep 15-Oct-20 12:29 AM the rent where they are at is quite high 15-Oct-20 12:37 AM I need help organizing my shed :/ 15-Oct-20 12:37 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/PXL_20201015_073540557.PHOTOSPHERE-29AC8.jpg 15-Oct-20 12:41 AM Get a sizeable mass of Pu-239 15-Oct-20 12:41 AM Then your organizing troubles will be over 15-Oct-20 12:41 AM Joyce doesn't take responsibility for other effects or the legality of said action 15-Oct-20 01:43 AM it's pretty expensive to run a hackerspace here @SleepyOwl Joyce oof. Which city/area? 15-Oct-20 01:43 AM Here in NL a lot of hackerspaces rent as "antikraak", basically renting parts of buildinga that are for sale/awaiting demolition. 15-Oct-20 01:43 AM "Antikraak" quite literally means "anti-squatting" and means rent far below market value in exchange for a contract with a very short notice cancellation clause 15-Oct-20 01:51 AM Singapore 15-Oct-20 01:51 AM Our hackerspace is in the heart of the city 15-Oct-20 01:51 AM So the prices are quite expensive for the area 15-Oct-20 01:51 AM And it is very small 15-Oct-20 01:51 AM Small office converted into a hackerspace 15-Oct-20 02:54 AM Well got my drill press and mini metal moved into the shed, though the drill press is just sitting on a wooden chair right now 15-Oct-20 11:05 AM @adammunich Moving this over here because it is not exactly #radiation related but I had a thought last night when cleaning...if you are looking for something that is both novel and useful... figure out how to make an aluminum magnet. 15-Oct-20 11:06 AM Aluminum magnet? 15-Oct-20 11:08 AM Yeah to get all those annoying little bits of aluminum up 15-Oct-20 11:08 AM Lol I see 15-Oct-20 11:08 AM You can push them out of the way with pulsed magnetic field but not pull 15-Oct-20 11:08 AM That doesn't help me clean my milling machine 15-Oct-20 11:09 AM Just get a dyson vacuum lol 15-Oct-20 11:09 AM I use that in my shop works great 15-Oct-20 11:10 AM Doesn't really work when you are clearing a couple pounds of chips 15-Oct-20 11:10 AM Don't underestimate these vacuums I picked up 50 lbs of plastic beads I spilled the other day 15-Oct-20 11:46 AM did you laugh when it happened? 15-Oct-20 11:52 AM i was pretty disappointed in myself for breaking a bag i knew was fragile lol 15-Oct-20 11:52 AM i dropped it on the floor too hard and /pop/ 15-Oct-20 03:38 PM My brain is hurting. 15-Oct-20 03:38 PM Just started signals and systems. 15-Oct-20 03:38 PM Discrete time analysis hurts my brain. 15-Oct-20 03:38 PM Like, cos(n/6) is not a periodic function. 15-Oct-20 06:15 PM But hey... I guess I can say that what they’re teaching in this class is... convoluted. 15-Oct-20 07:09 PM are you Fourier? 16-Oct-20 02:05 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/Screenshot_20201016-020532-4F3AB.png 16-Oct-20 02:05 AM @mike crb what do you think about that? 16-Oct-20 02:05 AM Basically it seems to say if you have no bias voltage on the nanopore fluid cell, your amplifier should detect 0 amps, but adding electrolyte causes current to be sensed. I can only guess this is some electrostatic or redox stuff going on. This seems to indicate there'd be net ionic movement from one electrode to the other. Or if it was redox stuff, the concentration gradient formed would cause a net movement. 16-Oct-20 02:05 AM That seems to be saying by applying a little bias voltage opposite of what was sensed, will get 0 amps net... But does that mean no net ionic movement? Can you really just "stop" redox with a little voltage? 16-Oct-20 02:05 AM Maybe I'm crossing different ideas... 16-Oct-20 07:11 AM I think you may be crossing ideas a little bit. They’re not stopping redox here, at such a low voltage you don’t really get any redox events any way. Probably just electrostatics... But essentially it’s just sweeping until 0 A to offset and electrostatic effects due to whatever the electrode is, or any amplifier voltage? Then storing that so applied 0 V is going to give you measured 0 A anytime the same system is used 16-Oct-20 09:35 AM So you don't think they're doing something that is unreasonable? 16-Oct-20 09:35 AM I.e. they think they're solving some issue, but not actually, or actually causing other unintended stuff 16-Oct-20 09:50 AM Nope not if they’re calibrating each time they have new electrode/electrolyte/etc to avoid any issues with that 16-Oct-20 09:50 AM But seems mainly this is just for fixing any op amp offset 16-Oct-20 10:40 AM Hmm, maybe, currently our system has like 10 or 30 picoamps of offset, not too nuch in the grand scheme of the whole 500nA range 16-Oct-20 11:11 AM Can you really just "stop" redox with a little voltage? @nmz787 yes you can and that's how modern ships protect themselves form corrosion. they have active electrodes that make oxidation of steel unfavorable 16-Oct-20 11:11 AM Some more advanced systems have silver chloride sensors in the water to make an active feedback loop to prevent under or overpotoential 16-Oct-20 11:14 AM Hmm, I've heard of them but thought they were passive and sacrificial 16-Oct-20 11:14 AM Like just easier to oxidize than the steel 16-Oct-20 11:15 AM The budget ones are 16-Oct-20 11:15 AM Professional ones use active voltage sources. 16-Oct-20 11:15 AM Also, when you moor a ship at a pier with shore power, you actually need some diodes in series with your ground cable to provide a voltage drop. Otherwise, if you accidentally ground your ship without that small voltage difference, you can cause millions of dollars worth of corrosion damage to it. 16-Oct-20 11:18 AM Huh 16-Oct-20 11:19 AM Conviently silicon diodes have the correct forward voltage for the job 16-Oct-20 11:19 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/sail082d_H-D3436.png 16-Oct-20 11:24 AM yeah corrosion massive field in echem 16-Oct-20 11:26 AM Hey, I did that! 16-Oct-20 11:26 AM When I wired shore power on my boat. 16-Oct-20 11:26 AM yeah corrosion massive field in echem In rust we trust 16-Oct-20 11:26 AM Did corrosion related research for a few summers, that was on someone’s door 16-Oct-20 11:28 AM I used bridge rectifiers, slapped to a large heat sink, to isolate the ground from the shore power outlet from the boat ground. 16-Oct-20 11:29 AM @Addison-110m yeah corrosion and battery stuff are such major sections of the field, and like super practical, but it really just does not get me excited at all lol 16-Oct-20 11:29 AM What type of stuff did you study 16-Oct-20 11:30 AM The rigging, engine, underwater metal, etc, all get bonded together, and that gets bonded to the DC negative of the boat’s DC system, as well as the isolated AC ground of the boat’s AC system. 16-Oct-20 11:30 AM Yeah same here, there’s a reason I wound up interested in radioactive material when I went to school. I was just doing marine coating testing and evaluation mostly 16-Oct-20 11:30 AM A lot of precise thicknesses of paint 16-Oct-20 11:31 AM And there are sacrificial zincs on the boat and in the engine. 16-Oct-20 11:33 AM Tons of cyclic wear testing of stress, bake, expose to UV, expose to salt fog, repeat 16-Oct-20 11:34 AM This will be handy knowledge if you start getting asked questions about radiolytic corrosion in your classes. 16-Oct-20 11:35 AM Assuming I do nuclear engineering? 16-Oct-20 11:35 AM I’m still trying to make my mind up about grad school really. Not entirely sure whether I want to apply this year or even what exactly I want to do 16-Oct-20 11:37 AM it's what, $100/application? 16-Oct-20 11:37 AM probably a safe gamble given you get like another 4 months to turn it down 16-Oct-20 11:37 AM or request it be differable. 16-Oct-20 11:38 AM Well, there’s the whole figuring out where to go and what I want to do part 16-Oct-20 11:39 AM well being overwhelmed at the idea 16-Oct-20 11:39 AM is not the greatest 16-Oct-20 11:40 AM Yeah, agreed 16-Oct-20 11:40 AM I’m making progress and I’ve still got a bit of time because applications won’t be due until winter 16-Oct-20 11:45 AM Dec 1st is deadline for federal funding here. For MSc. PhD was mid-sept 16-Oct-20 12:34 PM As a PhD student, I would only recommend grad school to someone who wants a job that needs a PhD 16-Oct-20 12:34 PM Masters is less bad tbf 16-Oct-20 12:34 PM Both in the sheer utility of the degree and actual difficulty 16-Oct-20 12:34 PM But grad school is rough 16-Oct-20 12:35 PM I think "wants a job that needs a phd" is also a bit vague 16-Oct-20 12:35 PM lots ask, but don't require 16-Oct-20 12:35 PM and you better want that job for reasons other than higher salary 16-Oct-20 12:35 PM It is 16-Oct-20 12:35 PM because the time spent getting the phd will generally outweigh the salary 16-Oct-20 12:35 PM But I don't know another way to put it 16-Oct-20 12:35 PM Like Pharma very much so has a glass ceiling for people in the science track without a PhD 16-Oct-20 12:35 PM But not every field does 16-Oct-20 12:36 PM I would put it more as "do the phd if you want to spend a ton of time fiddling around with the stuff to get your phd" 16-Oct-20 12:37 PM True. Good chance I'm a hypocrite and end up doing something that doesn't strictly need a PhD 16-Oct-20 12:37 PM But yeah, 6 years of being paid under $30k and working 50+ hours takes a toll 16-Oct-20 12:37 PM The independence is pretty sweet though 16-Oct-20 12:37 PM Albeit a lot of bosses are less "do whatever" than mine is 16-Oct-20 12:41 PM also the money faucet 16-Oct-20 12:41 PM is fun 16-Oct-20 12:44 PM I'm not sure how unique that is to academia though. 16-Oct-20 12:44 PM And it can be stressful at times 16-Oct-20 12:44 PM Just knowing that this supremely fragile thing in your hand costs like $10k 16-Oct-20 12:58 PM Look, a mounted doping cell 16-Oct-20 12:58 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/image0-B37D7.jpg 16-Oct-20 01:09 PM But is it aligned 16-Oct-20 01:09 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/fetchimage-999B8.png 16-Oct-20 01:09 PM the hene goes through it 16-Oct-20 01:09 PM the beam does not 16-Oct-20 01:09 PM pls expln 16-Oct-20 01:10 PM Voodoo 16-Oct-20 01:10 PM I'm sure you did this, but when you say the HeNe goes through it, you mean it goes through it and into the next chamber, right? 16-Oct-20 01:10 PM yeah 16-Oct-20 01:10 PM getting the diverging 0.8mm hene beam through the 1mm skimmer is hard 16-Oct-20 01:11 PM Okay, then voodoo yeah 16-Oct-20 01:11 PM but the doping cells have 5mm holes 16-Oct-20 01:11 PM so... 16-Oct-20 01:11 PM In good news, the swagelok lines I ran to the leak valve and such appear to have held excellent vacuum for several days 16-Oct-20 02:27 PM @Mezmorizor henes confirmed trash 16-Oct-20 02:27 PM I ignored the hene, and just used a bolt in an optical post to make sure the cell was equal distance from all sides 16-Oct-20 02:27 PM bam, perfect signal 16-Oct-20 02:27 PM Gate valves meant this was a quick 30 min experiment too 16-Oct-20 02:27 PM though I feel bad for the turbo having to spin up and down so many times the past month 16-Oct-20 02:34 PM Not terribly surprised tbh. You gotta be careful that your HeNe path is truly straight when you do it like that 16-Oct-20 02:34 PM And I have definitely aligned things with a bias thanks to the HeNe lying to me before :( 16-Oct-20 02:43 PM I just don't get 16-Oct-20 02:43 PM how it can go through the 1mm skimmer 16-Oct-20 02:43 PM and the 3mm skimmer a metre away 16-Oct-20 02:43 PM but the 5mm cell is lying 16-Oct-20 02:43 PM that makes no sense 16-Oct-20 02:53 PM As a PhD student, I would only recommend grad school to someone who wants a job that needs a PhD I’m going back and forth between the mostly because I feel like I want to do research 16-Oct-20 03:20 PM Well, research definitely counts as a job that requires a PhD, and iirc you like nuclear stuff, right? I don't think it would be TOO hard to get a national lab job if you do 16-Oct-20 03:20 PM And that's basically a different flavor of academia 16-Oct-20 03:20 PM aka all research 16-Oct-20 05:05 PM Yeah, that’s what I’ve been pondering basically 16-Oct-20 05:05 PM “Worst case” scenario I suppose I take a few years and work and apply again 16-Oct-20 05:16 PM @Mezmorizor I said perfect signal but it's only 80% of my signal 16-Oct-20 05:20 PM rip 16-Oct-20 05:21 PM I think I live with it for now 17-Oct-20 10:28 AM signal-ish 17-Oct-20 10:28 AM germany had a toothpaste named signal 17-Oct-20 10:40 AM *still has 17-Oct-20 10:52 AM ah nice 17-Oct-20 10:52 AM switched to sensodyne 17-Oct-20 10:52 AM maybe because my first contact with it was in spain - kinda best 5 months of my life 17-Oct-20 09:09 PM @SleepyOwl Joyce I was just thinking about you. I was studying Dirac delta functions. 17-Oct-20 09:09 PM Wondering if maybe I should do something impulsive? 17-Oct-20 09:15 PM All these puns make me green 17-Oct-20 09:16 PM I agree 17-Oct-20 09:16 PM this isn't Laplace for puns 17-Oct-20 10:16 PM hola 17-Oct-20 10:18 PM hey 17-Oct-20 10:18 PM whats up samy 17-Oct-20 10:19 PM hey sushi, winding down, been working on a wimshurst machine today (and, well, the last 10 weekends probably) 17-Oct-20 10:19 PM oh cool 17-Oct-20 10:19 PM what are you up to? 17-Oct-20 10:19 PM im gonna sleep soon, procrastinating by learning fun stuff 17-Oct-20 10:20 PM learning what? 17-Oct-20 10:20 PM everything 17-Oct-20 10:20 PM ️ recently 17-Oct-20 10:20 PM have any projects in mind? 17-Oct-20 10:20 PM i was always a fan of your tools and talks 17-Oct-20 10:20 PM pwnat and magspoof my favorite 17-Oct-20 10:20 PM nothing in mind, yet 17-Oct-20 10:20 PM i just find it facinating and need to learn a lot more before doing anything in it 17-Oct-20 10:22 PM hi 17-Oct-20 10:22 PM hoi 17-Oct-20 10:22 PM cool! lots of fascinating things and people on this server...i feel the same way with some areas 17-Oct-20 10:22 PM hey soj 17-Oct-20 10:23 PM im gonna get some high voltage rectifying diodes and some HV caps 17-Oct-20 10:23 PM soonish 17-Oct-20 10:23 PM planning to rectify my CCFL inverter 17-Oct-20 10:23 PM is struggling with getting some ATTiny85s programmed 17-Oct-20 10:23 PM has no darned idea why 17-Oct-20 10:24 PM wish i had something to measure that high... maybe i'll DIY myself a probe for it 17-Oct-20 10:24 PM oh hey 17-Oct-20 10:24 PM i haven't programmed attiny's before but i have programmed other things 17-Oct-20 10:24 PM whats your setup look like? 17-Oct-20 10:24 PM want help? maybe we can debug it uwu 17-Oct-20 10:25 PM I am using an Arduino as ISP to program these chips 17-Oct-20 10:25 PM I mean - this is not the first time I am programming ATTinys with an Arduino 17-Oct-20 10:25 PM it's just that today - somehow, someway, somewhat 17-Oct-20 10:25 PM it's refusing to program 17-Oct-20 10:25 PM mmm 17-Oct-20 10:25 PM rubber duck debug it 17-Oct-20 10:25 PM Device ID turns out wrong 17-Oct-20 10:25 PM programming verification fails 17-Oct-20 10:25 PM thats... interesting 17-Oct-20 10:25 PM blinky doesn't even work 17-Oct-20 10:25 PM and this is from a batch of chips from Element14 17-Oct-20 10:25 PM and I have used some chips from this batch before 17-Oct-20 10:26 PM is it- ...hmm 17-Oct-20 10:26 PM so I have really no darned clue what's wrong this time 17-Oct-20 10:26 PM I have been at it since 6 AM or so now 17-Oct-20 10:26 PM it's now 1:26 PM 17-Oct-20 10:26 PM it isn't like somehow programming for a different chip by accident 17-Oct-20 10:26 PM no 17-Oct-20 10:26 PM I have forced avrdude to program for ATTiny85 17-Oct-20 10:27 PM okay 17-Oct-20 10:27 PM do you have other chips from that batch? 17-Oct-20 10:27 PM @SleepyOwl Joyce is your clock low enough? what's the device id? 17-Oct-20 10:27 PM I already tried 4 17-Oct-20 10:27 PM @SleepyOwl Joyce do you have the params you're passing? 17-Oct-20 10:28 PM avrdude: Device signature = 0x000000 (retrying) 17-Oct-20 10:28 PM trying 4 it doesn't sound like its the attiny's fault ... i wonder if the Arduino you're using is okay 17-Oct-20 10:28 PM like ESD damaged or something? Have you tested it? 17-Oct-20 10:28 PM can you enable the debug and paste the full output? 17-Oct-20 10:28 PM if you're using IDE it will show the avrdude command 17-Oct-20 10:28 PM is anything else wired to the avr/programmer? 17-Oct-20 10:29 PM you know a fun trick... 17-Oct-20 10:29 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/unknown-9F1D6.png 17-Oct-20 10:29 PM https://hastebin.com/yutehevati.coffeescript 17-Oct-20 10:29 PM nope nothing else wired 17-Oct-20 10:30 PM if you take a tone probe like above, usually meant to trace phone lines and whatnot 17-Oct-20 10:30 PM and you place it near the data lines of a thing you're trying to program 17-Oct-20 10:30 PM just the arduino connected to the SPI lines of the ATTiny85 17-Oct-20 10:30 PM you can hear the pins wiggling 17-Oct-20 10:30 PM I mean I have a scope beside me 17-Oct-20 10:30 PM oh 17-Oct-20 10:30 PM probe it 17-Oct-20 10:30 PM already did 17-Oct-20 10:30 PM @SleepyOwl Joyce are you using the Arduino IDE? if so, try burning the bootloader. also what's the programmer? 17-Oct-20 10:31 PM Programmer is Arduino Uno programmed as ArduinoISP 17-Oct-20 10:31 PM what happened when you probed it? you saw normal expected stuff? 17-Oct-20 10:31 PM Bootloader burning fails with output:https://hastebin.com/niriwiqowu.yaml 17-Oct-20 10:32 PM are you using 10uF electrolytic between reset and gnd? 17-Oct-20 10:32 PM yes 17-Oct-20 10:32 PM exactly as per online guides 17-Oct-20 10:32 PM wiring is checked correct 17-Oct-20 10:32 PM basically all the easy stuff has been checked 17-Oct-20 10:33 PM it shows vtarget as 0.0v, you sure it's powered? can you send pic of setup and where the dot is on the attiny 17-Oct-20 10:34 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/20201018_133112-4A1F7.jpg 17-Oct-20 10:34 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/20201018_133138-11A29.jpg 17-Oct-20 10:34 PM so I realize that GND was off by one pin - but that's because I was redoing the wiring multiple times 17-Oct-20 10:34 PM I plugged the GND back to where it should be 17-Oct-20 10:36 PM yeah, what happens when you move to end? 17-Oct-20 10:36 PM same output 17-Oct-20 10:36 PM k 17-Oct-20 10:36 PM well 17-Oct-20 10:38 PM tries a new chip for prosterity's sake 17-Oct-20 10:38 PM nope 17-Oct-20 10:38 PM same outputs 17-Oct-20 10:38 PM @SleepyOwl Joyce 17-Oct-20 10:38 PM umm 17-Oct-20 10:38 PM what if you program the uno with a Blink (without the cap), does it work? 17-Oct-20 10:38 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/introduction-to-ATtiny85-6-8CCA0.png 17-Oct-20 10:38 PM it looks like 17-Oct-20 10:38 PM pin 6 is 17-Oct-20 10:38 PM not on pin 6 17-Oct-20 10:38 PM blue going to 12 instead of 6? 17-Oct-20 10:38 PM unless i have the wrong chart 17-Oct-20 10:39 PM I've followed a number of guides even on Arduino's site itself 17-Oct-20 10:39 PM I am sure it is connected the way it should be 17-Oct-20 10:39 PM okay 17-Oct-20 10:39 PM and when you probed it, you saw the scope wiggle properly on all the things? 17-Oct-20 10:41 PM is there a dot AND a notch on yours? it's hard to tell...if so, i'd try flipping one 17-Oct-20 10:41 PM it looks like dot only 17-Oct-20 10:41 PM there is a dot and printed triangle beside the dot 17-Oct-20 10:41 PM k, thought notch might be on opposite side from first pic but couldn't tell 17-Oct-20 10:42 PM let's try a blinky on the Arduino itself 17-Oct-20 10:42 PM i'd make sure the arduino is working properly and can be programmed - first i'd test blink sketch on it (i think you'll need to remove cap to program it), if that works then i'd still "Burn bootloader" again of just the arduino, then program isp again, then connect cap again and retry (you may need to remove the avr for programming the uno but not positive) 17-Oct-20 10:43 PM yeah 17-Oct-20 10:43 PM and do you have any attiny's from a different batch as well, in case these were a bad batch? 17-Oct-20 10:43 PM all of them are from the same batch 17-Oct-20 10:43 PM so I have a mix of new chips 17-Oct-20 10:43 PM and chips that I have managed to program before from the same batch 17-Oct-20 10:43 PM k 17-Oct-20 10:43 PM with no problems 17-Oct-20 10:43 PM and the same arduino? 17-Oct-20 10:44 PM yes 17-Oct-20 10:44 PM same breadboard? 17-Oct-20 10:44 PM breadboards like to eat signals lol 17-Oct-20 10:44 PM I can't say about the breadboard though 17-Oct-20 10:45 PM then after that all fails, i'd use logic analyzer or scope to record each pin and even make sure anything is getting sent or nothing is being pulled high/low improperly 17-Oct-20 10:45 PM mmhmm 17-Oct-20 10:48 PM what I don't get still 17-Oct-20 10:48 PM is that this worked before 17-Oct-20 10:48 PM what changed such that it won't work now? 17-Oct-20 10:49 PM just for fun do you have another breadboard? or have you tried another already 17-Oct-20 10:49 PM I can try in a bit 17-Oct-20 10:50 PM if everything worked before with no changes i'd be most curious if all the gpio's on the uno are still working so would verify the miso/mosi/clock/en all look good and are sending the data expected. would double check output voltage on 5V pin just in case 17-Oct-20 10:50 PM I have measured 5V to be 5V 17-Oct-20 10:50 PM blinky on arduino itself works 17-Oct-20 10:51 PM what changed such that it won't work now? also i've rarely zapped things with ESD but this one day.. oops i fried a bunch of transistors :\ 17-Oct-20 10:55 PM breadboard changed 17-Oct-20 10:55 PM now 17-Oct-20 10:55 PM avrdude: AVR device initialized and ready to accept instructions Reading | ################################################## | 100% 0.01s avrdude: Device signature = 0x1e930b (probably t85) avrdude: erasing chip avrdude: reading input file "/home/joyce/Desktop/ATTiny Birthday Card/Code/ATTiny_Birthday_Card/ATTiny_Birthday_Card.ino.hex" avrdude: writing flash (2982 bytes): Writing | ################################################## | 100% 4.23s avrdude: 2982 bytes of flash written avrdude: verifying flash memory against /home/joyce/Desktop/ATTiny Birthday Card/Code/ATTiny_Birthday_Card/ATTiny_Birthday_Card.ino.hex: avrdude: load data flash data from input file /home/joyce/Desktop/ATTiny Birthday Card/Code/ATTiny_Birthday_Card/ATTiny_Birthday_Card.ino.hex: avrdude: input file /home/joyce/Desktop/ATTiny Birthday Card/Code/ATTiny_Birthday_Card/ATTiny_Birthday_Card.ino.hex contains 2982 bytes avrdude: reading on-chip flash data: Reading | ################################################## | 100% 2.12s avrdude: verifying ... avrdude: 2982 bytes of flash verified avrdude done. Thank you. 17-Oct-20 10:57 PM so 17-Oct-20 10:57 PM it was the breadboard? 17-Oct-20 10:57 PM yes 17-Oct-20 10:57 PM mfw 17-Oct-20 10:57 PM yeah breadboards can be evil 17-Oct-20 10:57 PM they have high capacitance 17-Oct-20 10:57 PM and change wildly from mfg. to mfg. 17-Oct-20 10:57 PM even batch to batch 17-Oct-20 10:58 PM and as you can tell from the output 17-Oct-20 10:58 PM there's a reason why I am so totally frustrated it couldn't program 17-Oct-20 10:59 PM and they muddle signals with sharp edges and fast speeds especially 17-Oct-20 10:59 PM afaik square waves hate breadboards lol 17-Oct-20 10:59 PM oh 17-Oct-20 10:59 PM heck 17-Oct-20 10:59 PM but you got it in time for the birthday, yes? 17-Oct-20 11:00 PM I only have hours left 17-Oct-20 11:00 PM wow 17-Oct-20 11:01 PM and I haven't yet to actually start debugging 17-Oct-20 11:04 PM so I am trying to get this to play a melody 17-Oct-20 11:04 PM I hear the melody 17-Oct-20 11:04 PM LCD screen has jack 17-Oct-20 11:04 PM gahhh! 17-Oct-20 11:04 PM the buzzer is faulty 17-Oct-20 11:04 PM it seems to have cracked 17-Oct-20 11:04 PM let's solder another one in 17-Oct-20 11:04 PM anyway @sushi thanks for the suggestion 17-Oct-20 11:04 PM you wouldn't think that troubleshooting programming takes hours 17-Oct-20 11:23 PM im glad i could help somehow 17-Oct-20 11:23 PM i hope you get it finished in time uwu 17-Oct-20 11:23 PM im going to try to sleep 17-Oct-20 11:23 PM night! 17-Oct-20 11:23 PM i shoulda been sleeping like 2.5 hours ago but i always procrastinate ;-; 18-Oct-20 03:06 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/PXL_20201018_094135819-106DC.jpg 18-Oct-20 03:06 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/PXL_20201018_094158298-B218B.jpg 18-Oct-20 03:06 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/PXL_20201018_094230837-A4B5A.jpg 18-Oct-20 03:06 AM My nanopipette wet test setup 18-Oct-20 03:06 AM And my laptop battery died, and now I'll go to bed with it all just sitting here like this 18-Oct-20 06:45 AM I had... some unpleasantness... with an ATtiny. 18-Oct-20 06:45 AM I bought a programmer board for it. 18-Oct-20 06:45 AM I was hoping I could use the Arduino libraries. Nope. Even though they worked, there wasn’t enough RAM after including Serial to do anything useful. Had to deal with bare metal C programming. 18-Oct-20 07:32 AM Hence - I do use them for very simple applications 18-Oct-20 07:45 AM For stuff needing a bit more complexity, even the STM32 family of stuff works quite fine 18-Oct-20 10:14 AM nice @nmz787 , you know the pore diameter? 18-Oct-20 11:09 AM @mike crb yeah checked them in my FIB and cut a few to size 18-Oct-20 11:09 AM Around 200, 300, and 460nm 18-Oct-20 11:27 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/20200903_022656-C917F.jpg 18-Oct-20 11:27 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20200903_041245-6F79B.jpg 18-Oct-20 12:26 PM Oh those look nice 18-Oct-20 12:49 PM good call on breadboard @sushi, curious what the underlying issue was 18-Oct-20 01:12 PM Anyone ever use OpenCV for measuring? 18-Oct-20 02:50 PM Yeah we use it for counting ion hits in 2D rather than just saving images 18-Oct-20 05:47 PM @samy poor breadboard contacts probably? 18-Oct-20 05:47 PM also - I should probably mill out and solder up a shield for programming AVRs 18-Oct-20 05:48 PM @SleepyOwl Joyce guess so (curious if it was possibly something was shorted in the board - super unlikely but i've never seen that before and would be curious if it ever happens 18-Oct-20 05:49 PM what I realized was this 18-Oct-20 05:49 PM if I were to probe the MOSI line 18-Oct-20 05:49 PM you see the expected serial data on the scope at the correct voltage levels 18-Oct-20 05:49 PM but on the MISO line 18-Oct-20 05:49 PM you see something that looks like a digital signal 18-Oct-20 05:49 PM but at <0.5V 18-Oct-20 05:49 PM I have not seen that before either - so now I know which breadboard to toss 18-Oct-20 05:51 PM ahh nice! so as you said, bad contacts and guessing capacitively coupling to the signal 18-Oct-20 05:52 PM yeah 18-Oct-20 05:52 PM I was thinking that it would be a quick jig to program my stuff 18-Oct-20 05:52 PM and it caused me a number of hours of grief 18-Oct-20 05:52 PM ughhh 18-Oct-20 05:54 PM sorry, that sucks! good to know one other thing to look out for (i will look out for that in the future!) 18-Oct-20 05:54 PM I apparently don't even know what I am typing 18-Oct-20 05:54 PM just woke up 18-Oct-20 05:54 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_9888-384D9.JPG 18-Oct-20 05:54 PM my "official" tiny+icsp programmer 18-Oct-20 05:54 PM haha 18-Oct-20 05:55 PM I have managed to do RF stuff and PLL testing before... on breadboards 18-Oct-20 05:55 PM not exactly the best choice of prototyping board though 18-Oct-20 05:55 PM was able to hook up stuff like Si5351s on a breadboard and test some circuits 18-Oct-20 06:01 PM ahh nice 18-Oct-20 06:03 PM is so sleepy and barely awake 18-Oct-20 06:03 PM needs coffee 18-Oct-20 06:03 PM https://tenor.com/view/owl-chilling-coffee-sleepy-cute-gif-17303471 18-Oct-20 06:04 PM haha 18-Oct-20 06:04 PM i woke up wanting to buy some cheap acrylic sheets on amazon...many hours later i might have a browser extension that will show me the price by volume since i can't mentally figure out price comparisons 18-Oct-20 06:06 PM oooh haha 18-Oct-20 06:06 PM speaking of acrylic 18-Oct-20 06:06 PM this week I hope to try and mill some keychains out with my CNC mill 18-Oct-20 06:06 PM for testing 18-Oct-20 06:07 PM nice, what kind of mill? 18-Oct-20 06:07 PM before I get onto PCB milling and other things 18-Oct-20 06:07 PM cheap 3018 CNC 18-Oct-20 06:07 PM already did some basic testing, but haven't milled anything yet 18-Oct-20 06:07 PM https://cdn.discordapp.com/attachments/754236249296076840/765897721747603456/VID-20201014-WA0010.mp4 18-Oct-20 06:07 PM and yes that's the dining table 18-Oct-20 06:07 PM needs a bigger apartment 18-Oct-20 06:07 PM I am going to see where I can run this where dust isn't too much of a concern 18-Oct-20 06:07 PM or where I can more easily clean up 18-Oct-20 06:21 PM nice! 18-Oct-20 09:08 PM Nice indeed! I did my first CNC milling on a similar machine. 18-Oct-20 09:08 PM It was hooked up to a PC running Mach 3 doing stepper pulses over the parallel port. 18-Oct-20 09:11 PM @SleepyOwl Joyce make some machinable wax 18-Oct-20 09:11 PM Melt down polyethylene and paraffin together 18-Oct-20 09:12 PM @SleepyOwl Joyce milo 18-Oct-20 09:12 PM You can reuse the scraps 18-Oct-20 09:12 PM ❤️ 18-Oct-20 09:12 PM It's recastable 18-Oct-20 09:13 PM Hmmmm 18-Oct-20 09:13 PM Interesting 18-Oct-20 09:14 PM All you need is a stove, some candle paraffin and polyethylene. Old milk cartons or something will do just fine 18-Oct-20 09:14 PM It's kind of a wonder material for the hobbyist, holds shape well and very strong 18-Oct-20 09:15 PM I see 18-Oct-20 09:15 PM @idmb and yes - milo 18-Oct-20 09:51 PM PE plastic dissolves in paraffan wax? 18-Oct-20 10:01 PM Reiterating from earlier times this came up, here's your safety warning that when you make enough of paraffin blocks for shielding material you have added an awful lot of flammable load to the space. The kind of thing fire marshals get a little excited about. 18-Oct-20 11:43 PM I was unable to burn the commercially made machine wax when mixed with KNO4 as solid rocket fuel, but it can burn in a wood fueled fire once melted. 18-Oct-20 11:43 PM If you poured it into cans it would become much harder to burn, even in a wood fire. 18-Oct-20 11:49 PM Well yes, it's paraffin wax. It's hydrocarbon combustion which is a gas phase reaction. You need vapors for it to happen. 19-Oct-20 12:21 AM this is really cool, james simulated NTSC in a web browser! you can use the down arrow key to change the channel. https://substack.net/tv/ 19-Oct-20 07:06 AM Most things burn in air, in a vapor state. Or in the example of dust explosions something analogous to a vapor state. 19-Oct-20 10:04 AM Air has a lot more O2 19-Oct-20 11:20 AM @Mezmorizor yeah it's pretty funny, if you put gasoline in an atomizer it doesn't burn well. 19-Oct-20 04:32 PM Who was it that collects old computers and terminals, @Conmega ? 19-Oct-20 04:33 PM That's be me 19-Oct-20 04:33 PM @Noxz 19-Oct-20 04:33 PM I reecieved a terminal keyboard in today 19-Oct-20 04:33 PM unused, with Honeywell hall effect switches 19-Oct-20 04:33 PM Danish layout 19-Oct-20 04:33 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/s-l1600-56BBC.jpg 19-Oct-20 04:33 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/DSC_2132-AC220.jpg 19-Oct-20 04:33 PM those keycaps tho.. 19-Oct-20 04:34 PM Ah hrm. Not sure what that's out of off hand... my one friend who's main thing is terminals probably could tell ya lol 19-Oct-20 04:34 PM blue keys are super strong, 8oz to press them 19-Oct-20 04:34 PM also yup doubleshot is nice 19-Oct-20 04:35 PM I mean, the keyboard I am on here is double/tripple shot, but thin in comparison 19-Oct-20 04:35 PM Burroughs terminal 19-Oct-20 04:35 PM but yeah, a 60% ! 19-Oct-20 04:35 PM I likeely will neeed different keycaps.. like, no exclamation point?? 19-Oct-20 04:35 PM and it'll screw with my head not having it printed 19-Oct-20 04:35 PM anywho, I hooked things up to the scope, found out the main 8048's ground pin was bent eenough away in the socket to NOT be connected, fixed that, and get the LEDs to flash on powerup instead of just ON.. no output on datalines that I would suspect 19-Oct-20 04:35 PM (via scope) 19-Oct-20 04:35 PM but, I did find/fix one problem 19-Oct-20 04:37 PM Well... I am not a keyhoarder myself so I can't help you in irreversibly destroying a terminal keyboard 19-Oct-20 04:37 PM not sure if I need to hold one of the pins high/low to get data 19-Oct-20 04:37 PM but I can try and figure out the terminal it goes to if your actually into preserving history :P 19-Oct-20 04:38 PM heh, that is one reason I am trying to sniff stuff, to not really destroy it?? but.. really, the gold here is the honeywell hall effect switches 19-Oct-20 04:38 PM likee, I want a new keyboard 19-Oct-20 04:38 PM I am sorry but your talking to the wrong person to nerd out about old keyboards in terms of "omg the feel its like nirvana" 19-Oct-20 04:38 PM I'd be happy if I could get it working without buying/spinning up a new board for it all 19-Oct-20 04:38 PM haha 19-Oct-20 04:39 PM I am the type of person who owns beamspring keyboards and its like, eh its ok, its like typing on a selectric typewriter 19-Oct-20 04:39 PM that's what they were going for 19-Oct-20 04:39 PM do you understand the appeal of hall effect? 19-Oct-20 04:39 PM Sure it should never wear out really 19-Oct-20 04:39 PM I have hall effect keyboards 19-Oct-20 04:39 PM Ooo 19-Oct-20 04:40 PM I also have an IBM 3277 with the dataentry keyboard that uses not beamspring but reed switches 19-Oct-20 04:40 PM I am half thinking about dumping this 8048 to simply figure out how to talk to this thing 19-Oct-20 04:40 PM ah, nice.. I gave my model M to the friend that got me into mechs 19-Oct-20 04:40 PM The better option is finding the terminal it goes with and using the terminal 19-Oct-20 04:40 PM this keyboard is a vintage Alps 19-Oct-20 04:40 PM nahhhh 19-Oct-20 04:40 PM what purpose is that? 19-Oct-20 04:41 PM Model Ms are my prefered switch, Model F is nicer if you like a lighter keyswitch 19-Oct-20 04:41 PM the new keyboard is completely linear though, no click at all 19-Oct-20 04:41 PM the purpose is the fact that none of you keyhoarders would have access to ANY of these keyboards if the people didn't save the entire terminal and keyboard for the last 30-40 years 19-Oct-20 04:41 PM so, there is one with the terminal on ebay for not too much 19-Oct-20 04:41 PM scrapping the terminal for a stupid keyboard is the most frustrating thing to me 19-Oct-20 04:42 PM oi, there was! 19-Oct-20 04:42 PM so, this was a replacement part 19-Oct-20 04:42 PM I have computers I can't use because I don't have terminals and I have friends with terminals and no keyboards he can't use because the keyboards go for THOUSANDS of dollars now 19-Oct-20 04:42 PM unused, bagged 19-Oct-20 04:42 PM And he bought the one terminal complete 19-Oct-20 04:42 PM and when he got the package had no keyboard 19-Oct-20 04:42 PM the seller SOLD THE KEYBOARD OUT FROM UNDER HIM 19-Oct-20 04:43 PM uh-oh 19-Oct-20 04:43 PM presumably because some guy from deskthority offered the seller like 2K for it 19-Oct-20 04:43 PM oh, listing is still there.. https://www.ebay.com/itm/283938174328 19-Oct-20 04:43 PM And the seller did the morally corrupt thing because how could you say no to some neckbeard going through the midlife crises of buying keyboards 19-Oct-20 04:44 PM slightly diffeerent layout, but sure 19-Oct-20 04:44 PM dear god the powerswitch is massive lol 19-Oct-20 04:44 PM this is danish, which is argh to me.. but, again, the purpose was the switches, basically new 19-Oct-20 04:44 PM but yea I have two IBM terminals now which I may never have keyboards for... 19-Oct-20 04:44 PM which just erks me 19-Oct-20 04:44 PM because the terminals are so rare and special 19-Oct-20 04:44 PM and SO COOL 19-Oct-20 04:45 PM yeah, I get you are into preservation 19-Oct-20 04:45 PM but I can't use them or show them off 19-Oct-20 04:45 PM No I'm into cool stuff 19-Oct-20 04:45 PM ah, that too 19-Oct-20 04:45 PM Look 19-Oct-20 04:45 PM I like a bit of the keyboard I got 19-Oct-20 04:45 PM as I said, it seems to have been a replacement, maybe for Danish specifically (swap out) that has sat in storage since 1980 19-Oct-20 04:46 PM this is the equivalent of taking the steering columns/wheels/etc out of model ford Ts and putting them in new cars, and scrapping the model T... 19-Oct-20 04:46 PM Its so incredibly mind numbing to me 19-Oct-20 04:46 PM Why? because it feels nicer 19-Oct-20 04:46 PM wat 19-Oct-20 04:46 PM so, I am attemepting to not harvest stuff from this, yet 19-Oct-20 04:46 PM So like the thing is a lot of people claim "oh well I do writing and I prefer the feel of a beamspring" ok... GET A SELECTRIC TYPEWRITER 19-Oct-20 04:46 PM and just tap onto the protocol 19-Oct-20 04:47 PM it feels the same and its what you use for writing lol 19-Oct-20 04:47 PM Oh cool that honeywell actually has current loop too 19-Oct-20 04:47 PM that's nice 19-Oct-20 04:47 PM Anyway yea 19-Oct-20 04:47 PM one of the rare terminals I have is this 19-Oct-20 04:47 PM https://uploads.ifdesign.de/award_img_39/13416_01_IBM_3290_Informations-Anzeigegeraet_0001.jpg 19-Oct-20 04:47 PM an IBM 3290 19-Oct-20 04:47 PM can do 4 concurrent terminal sessions and is a MASSIVE glass plasma display 19-Oct-20 04:47 PM SUPER DUPER cool terminal 19-Oct-20 04:47 PM but the keyboard is worth thousands now because "OMG 'SPACESAVER' 'BATTLESTATION KEYBOARD, R@R3 L@@K" 19-Oct-20 04:47 PM its so infuriating 19-Oct-20 04:47 PM and the keyboard for that terminal is FOR THAT TERMINAL 19-Oct-20 04:47 PM that's it, 19-Oct-20 04:47 PM no other terminal used it 19-Oct-20 04:49 PM my 'e' key on this guy has been bouncing lately, I am sure a capacitor could fix it, but it's been frustrating, plus I watched a few movies lately with keyboards that got me searching, and came across the auction for what I now posses 19-Oct-20 04:49 PM THX1138 and Pi in the past month 19-Oct-20 04:49 PM sorry if I am being frustrating.. I have no desire for an actual terminal though.. I was a sysadmin for a few years so I could imagine ttrying to make it all work, but I am not anymore.. was just in the market for a new thing 19-Oct-20 04:49 PM and, well, I actually half designed a new hall effect switch, on paper, so I am into them, this is my first one though 19-Oct-20 04:52 PM So this is the thing. If your not interested in old tech. Why the keyboards? There are SOOOO many keyswitches on the market now. People are re-making the Model Fs now even. 19-Oct-20 04:52 PM Like if you have a desire for some SUPER specific old switch, you can either probably technically still buy them. OR we have the tech you can probably re-make them. 19-Oct-20 04:52 PM well, I am into vintage watchmaking machinery, which is pre-tech 19-Oct-20 04:52 PM Right 19-Oct-20 04:52 PM and how do you feel with someone taking an old watch and gutting it to put a quartz movement in it and selling it as steampunk after soldering some brass onto it? 19-Oct-20 04:52 PM That's how I feel when people take my keyboards and scrap the terminals >:( 19-Oct-20 04:53 PM ... is there a leahter top hat with a feather in it involveed? 19-Oct-20 04:53 PM also, like I said, it appears to be a replacemeent part, unused.. not the actual full keyboard (otherwise, where is the shell?) 19-Oct-20 04:54 PM Taking unobtanium hardware that we can't really replace and turning it into something that will get thrown out when they die is so erking to me 19-Oct-20 04:54 PM Your example is obviously whatever to me 19-Oct-20 04:55 PM I mean, I am trying to make the action of it slightly better 19-Oct-20 04:55 PM I am just trying to educate as many people on how frustrating it is to see keyboards seperated from terminals 19-Oct-20 04:55 PM nods 19-Oct-20 04:55 PM and I work for, collect and adore IBM stuff 19-Oct-20 04:55 PM and IBM keyboards are the most sought after 19-Oct-20 04:55 PM So it especially hurts my soul 19-Oct-20 04:55 PM I collected vintage pocket watches for awhile 19-Oct-20 04:55 PM and I can respect what you do 19-Oct-20 04:55 PM never would I scrap or cause harm to one intentionally 19-Oct-20 04:55 PM I treat those who preserve stuff with respect 19-Oct-20 04:55 PM Keyboard collectors do not generally treat us with respect 19-Oct-20 04:55 PM nor do they seem to even treat eachother with respect 19-Oct-20 04:55 PM its all about who has the weirdest rarest thing 19-Oct-20 04:55 PM its all a game 19-Oct-20 04:55 PM Like take Modem Ms and Model Fs and just use USB to PS/2 or AT adapters 19-Oct-20 04:55 PM go for it 19-Oct-20 04:55 PM thats reversible and well they are designed for PCs 19-Oct-20 04:55 PM it makes sense 19-Oct-20 04:55 PM but when you take my terminal keyboard which has the SWITCHES ON THE BOTTOM to set configuration on the terminal and has special keys for special things... I can not just take an off the shelf PS/2 keyboard and adapt it to my terminal with a microcontroller 19-Oct-20 04:55 PM I'd have to design a keyboard from scratch... And if I want custom keycaps so I know what one of the 200 keys does... lol yea thanks 19-Oct-20 04:59 PM yeah, these blue terminal specific switches are neat.. CTRL, SPCFY, LOCAL, RCV, XMT 19-Oct-20 04:59 PM 8oz to press them instead of 1.5 for the reg keys.. so you really wanna change modes 19-Oct-20 05:00 PM Yes, neat keys, absolutely required to function the terminal 19-Oct-20 05:00 PM like, press [y] to confirm mode switch, sorta thing 19-Oct-20 05:00 PM And in some cases required to function the COMPUTER 19-Oct-20 05:00 PM for example, 3277 Mod 1 terminal 19-Oct-20 05:00 PM had two different keyboards 19-Oct-20 05:00 PM a data entry which used reed switches, and a full console keyboard, beamspring of-course 19-Oct-20 05:00 PM that console keyboard is REQUIRED to use it as a console on an IBM System/3 19-Oct-20 05:00 PM because it has keys the other keyboard physically doesn't 19-Oct-20 05:00 PM https://pbs.twimg.com/media/CylSm_5XgAAgegI.jpg 19-Oct-20 05:00 PM Here is mine 19-Oct-20 05:00 PM I paid like... god I don't know... 600 dollars to buy that terminal and get it shipped here from europe 19-Oct-20 05:00 PM and of-course that's the data entry keyboard 19-Oct-20 05:00 PM so the S/3 I may end up with someday I can't use this as the console unless I do some horrible hacking others have had to do in the past 19-Oct-20 05:00 PM those keyboards are now harder to find thanks to keyhoarders 19-Oct-20 05:00 PM I am sure someday the keyboarding fad will die, and the keyboards will show back up on the market cheap... in like 40 years maybe 19-Oct-20 05:00 PM the problem? most of them have adapters that remove the internal controller board 19-Oct-20 05:00 PM so they will still be USELESS 19-Oct-20 05:00 PM GAH 19-Oct-20 05:04 PM ugh, hacks 19-Oct-20 05:04 PM Its like its one thing to take the keyboards I need away, its another to irreversibly destroy them 19-Oct-20 05:04 PM and sure yes if the person keeps the parts you CAN reverse it theoretically 19-Oct-20 05:04 PM but most people will probably just throw that stuff out if they even get it from the seller who undoubtably bought the keyboard for 1200, refurbed and put the controller it it, then re-sold it for 2K to some person who needs their gaming keyboard 19-Oct-20 05:05 PM I dont game, but I hear ya 19-Oct-20 05:05 PM also, apologies if I set you on edge from bringing it up 19-Oct-20 05:11 PM Its just always an infuriating topic to me. I know people who have been in this hobby for like 25 years, and have terminals they have held onto and stored for 20+ years and have yet to find a keyboard for it, and now not only can they not find one, if they do they can't afford it. They may die never seeing that terminal function even though they will inevitably hold onto it for over half their life. 19-Oct-20 05:11 PM random old computer thing - I got another four imac g3s yesterday 19-Oct-20 05:12 PM God bless your poor soul, its not easy bearing the weight of 4 boat anchors all at once :P 19-Oct-20 05:12 PM But nah, apple stuff isn't my thing, and a lot of people see those as junk but if you like them go for it! 19-Oct-20 05:12 PM but I warn you, you tell the wrong person you like that stuff and you'll end up with a storage unit more 19-Oct-20 05:12 PM :P 19-Oct-20 05:13 PM Should I try to dump the 8048 on this thing to grab the full protocol and whatnot? 19-Oct-20 05:13 PM You can try sure, its going to be a lot of decompilation 19-Oct-20 05:13 PM 1K rom shouldnt be too hard to reverse 19-Oct-20 05:13 PM mostly scanning 19-Oct-20 05:13 PM heh you say that :) 19-Oct-20 05:13 PM haha, I do a lot of reverse engineering stuff 19-Oct-20 05:13 PM not typically this kind of hardware, but sure 19-Oct-20 05:14 PM I've drooled over decomped code and just kinda gave up 19-Oct-20 05:14 PM though I also didn't have the keyboard in front of me 19-Oct-20 05:14 PM So I couldn't reverse engineer the circuit... I just had code 19-Oct-20 05:14 PM one of my better attempts was at M68k.. a few years ago reversing an old macintosh game for the CastAR 19-Oct-20 05:14 PM which, I am still awaiting my TiltFive dev kit 19-Oct-20 05:19 PM I just like the colours 19-Oct-20 05:19 PM trying to get them all 19-Oct-20 05:19 PM I made an M68k namebadge heh 19-Oct-20 05:19 PM words are hard, anyway 19-Oct-20 05:19 PM put a spot for a uart and an IDE DOM so I could theoretically run UNIX on it 19-Oct-20 05:19 PM Never got that far with it. did get it scrolling my name though 19-Oct-20 06:17 PM https://www.youtube.com/watch?v=k72SFBOZ_lw 19-Oct-20 06:46 PM https://info.aps.org/e/640833/um-email-utm-source-emailalert/fy3kg/351508055?h=l71FucgxOJ4Mhs0M1gQTCMJHAbSBk-q7MLyBr0Fnu2A 19-Oct-20 07:04 PM https://www.youtube.com/watch?v=Puo6Vgcbxps 19-Oct-20 07:21 PM https://external-content.duckduckgo.com/iu/?u=https%3A%2F%2Fexternal-preview.redd.it%2FQDZHhpvRKZQNmZKFJlpuRHaGjVHFz47Bd48sn-b-bo4.jpg%3Fwidth%3D716%26height%3D374.869109948%26auto%3Dwebp%26s%3D6467255f3e4ebc49f7d32a66586c7bfaa65dc616&f=1&nofb=1 19-Oct-20 07:46 PM wow, so I decided to try and dump this 8048.. but one of my only microcontrollers laying around not in use is a BLE devkit... and it turns out I cant download code into it using the eclipse IDE.. I need to use some other tool, but the IDE does work to step through and debug, including updating variable values and setting breakpoints 19-Oct-20 07:46 PM just cant download the code into it 19-Oct-20 07:46 PM I am sure it just does some command line in the background, but sucks 19-Oct-20 11:43 PM I think I may have ripped the rom.. geetting deceent repeatability of it all 19-Oct-20 11:43 PM having trouble saving the output, lol.. 19-Oct-20 11:43 PM oi, I got it 20-Oct-20 12:00 AM why can I not find a quick ref of the instruction set in HEX, all I am finding is scans of the manual showing binary 20-Oct-20 12:33 AM well, first instruction may say to jump to 0x200.. which is somewhat okay because the 6 bytes prior to it are al 0x00 ... this is going to be a while 20-Oct-20 12:33 AM not sure why I cant find MCS-48/8048 in IDA, would love to just hit that decompile button 20-Oct-20 01:04 AM Super janky shielding does WONDERS for nanoamp noise reduction 20-Oct-20 01:04 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/PXL_20201020_074450717-B12DA.jpg 20-Oct-20 02:03 AM try a metal paint can or wastebasket 20-Oct-20 02:36 AM btw, I am very satisfied with myself of having extracted that code.. just working through mostly by hand, and learning the small instruction set, of what is going on 20-Oct-20 02:36 AM I found two other keyboard codes of thee chip, and they are pretty much nothing alike 20-Oct-20 02:36 AM atleast on bootup 20-Oct-20 04:50 AM ooh hey wanna post the dumps or something? o: 20-Oct-20 09:55 AM I can, currently I am comenting next too the reversed assembly to describe it a bit more 20-Oct-20 09:55 AM where I found the others: http://halicery.com/Hardware/Intel%208042%20and%208048/8042%20and%208048%20ROM%20disassemblies.html 20-Oct-20 11:34 AM I actually still need to follow the traces to understand what Port 1, 2, and the Bus aree actually connceted to, heh 20-Oct-20 11:34 AM lots of 74L logic stuffs 20-Oct-20 11:34 AM also, amount of codee is probably more like 512 + 128, plenty of openspace/NOPs .. interesting enough, these chips were not programmed.. not in that traditional sense, but coded from photolithography (at the Intel factory?) 20-Oct-20 12:25 PM Any one have electrowetting experience? 20-Oct-20 12:39 PM @mike crb I've only read about it a bunch... EWOD and such. https://www.gaudi.ch/GaudiLabs/?page_id=392 20-Oct-20 12:39 PM https://hackteria.org/wiki/Elektrowetting 20-Oct-20 12:42 PM Yeah I'm working on DMF platform, but I'm trying to fabricate additional sensing region in the middle of the droplet. Want to make sure if I have a less hydrophobic region in the center of my "pad" (electrode, grid space, idk what to call) that it won't mess up device operation. I'd still have hydrophobic region on the outer edges, where the 3 phase interface would normally be but in the very center of the pad geometry (which would still be wetted, even with high contact angle droplets) I want it to not have a fluorinated coating 20-Oct-20 12:42 PM Essentially, does contact angle of young-dupre equation depend on the whole droplet-substrate surface tension, or is it really just determine by the local droplet-substrate surface tension at the 3 phase interface 20-Oct-20 12:44 PM I think it's all about balancing charge/force 20-Oct-20 12:44 PM Hmm, arent the pads usually hydrophilic? 20-Oct-20 12:44 PM I haven't checked ewod stuff in a while 20-Oct-20 12:45 PM Well yeah, but the effect charge has on forces affecting the droplet only really matters at the 3 phase 20-Oct-20 12:45 PM usually hydrophobic pads 20-Oct-20 12:45 PM 3phase meaning pad, liquid, air? 20-Oct-20 12:46 PM yeah 20-Oct-20 12:46 PM If it's wet already, seems OK for sensing in off state 20-Oct-20 12:46 PM For moving i guess you're concerned it will smear or prevent movement? 20-Oct-20 12:47 PM Yes precisely what I'm worried about 20-Oct-20 12:47 PM Smear/detach 20-Oct-20 12:47 PM Hmm 20-Oct-20 12:47 PM Gotta oppositely bias to make hydrophobic during movement? 20-Oct-20 12:48 PM Well young dupre equation for EWOD is dependent on V^2 so sign doesnt matter 20-Oct-20 12:48 PM I can't remember if the pad is in direct contact, or if there's a dielectric usually... Obviously you're sensing area wouldn't have dielectric so... 20-Oct-20 12:48 PM any charged interface will lead to lower contact angle 20-Oct-20 12:48 PM yeah there is dielectric 20-Oct-20 12:48 PM I haven't read that one equation 20-Oct-20 12:50 PM bias essentially polarizes water-substrate interface and lowers surface tension 20-Oct-20 12:52 PM Can you do impedance spectroscopy through a dielectric? 20-Oct-20 12:52 PM That way no pad in direct contact? 20-Oct-20 12:52 PM https://www.digikey.com/en/products/detail/digilent-inc/410-246/4090068 20-Oct-20 12:54 PM Maybe, but you wouldn't be able to figure out a proper representative circuit because of the massive capacitance of the dielectric compared to normal electrode capacitance i think 20-Oct-20 12:54 PM But we need electron transfer 20-Oct-20 12:54 PM I think it's gonna call for some modelling. Which sucks i didn't think about this sooner because that's like whole extra step before i know if design would work and can get mask made. 20-Oct-20 01:48 PM @mike crb Marc Juul, @juul on twitter 20-Oct-20 10:36 PM I think I found the LED status driver routine 20-Oct-20 10:36 PM also, by no means did I think I would have this working within a day, but I suspect within 2 weeks, not from current progress or anything, just realistic hobby time frame 21-Oct-20 12:43 PM So, apparently I didnt give a long enough time delay (I had none) from reading the ROM .. I assumed I got good data when the disassembly made a bit of sense, but some of that was just luck 21-Oct-20 12:43 PM parts did not make sense.. attempted to read up to 4k for one reason or another, and got nearly the same repeating 1k chunks, but not exactly.. so, imposed a delay, and now a bit of code changed! 21-Oct-20 12:43 PM part of that is due to length of instructions (if it takes an argument) 21-Oct-20 12:43 PM so.. not exactly back to square one, but I am more square now 21-Oct-20 12:43 PM .. I guess I was just practicing before 21-Oct-20 01:55 PM also, the 4k I read, slowly was just 4x1k .. and matched perfectly, so I am confident I got it all this time 21-Oct-20 01:55 PM so far walking through the code as I did before (from restart vector) is exactly the same, but ther eis plenty of new code that I havent got to yet 21-Oct-20 01:55 PM hah - got the first code difference... and boy did it change some of the flow 21-Oct-20 01:55 PM kthxbye 21-Oct-20 08:43 PM This is so surreal. I just now discovered that I used discrete time convolution without having any idea what it was when building my computer controlled beer brewing system. 21-Oct-20 08:48 PM @rdpierce is that a sine of sorts? 21-Oct-20 09:10 PM Depends on your religious views. I don’t consider beer as sineful. 21-Oct-20 09:10 PM I had a keg of water heated by a propane burner. The burner was on or off. But the problem was that the system had a massive lag time to it. If I heated the water, it would overshoot several degrees, which could kill the grain enzymes. 21-Oct-20 09:10 PM So I needed to predict the overshoot and add that to the current water temperature from the temp probe, and then make a control decision of whether the burner should be on or off. 21-Oct-20 09:10 PM What I did was store the history of the burner for the last rolling 30 seconds. Every second, my code would go back and sum the number of seconds where the burner was on. It would multiply that by a constant and produce an estimated overshoot. 21-Oct-20 09:15 PM so.. PID? 21-Oct-20 09:15 PM or maybe just PI ? 21-Oct-20 09:15 PM I havent actually dealt with PID yet 21-Oct-20 09:16 PM That’s convolution. My delta response h=k(u(0) - u(30)). So I was inverting it in time and multiplying it by the signal of whether the burner was on or off. 21-Oct-20 09:16 PM No, PID doesn’t work well in systems with high lag. 21-Oct-20 09:16 PM There is something called a Smith Predictor. 21-Oct-20 09:16 PM I could understand it conceptually, but it required a mathematical model of my plant, and I didn’t have the differential equations skills at the time to do it. 21-Oct-20 09:16 PM Basically, what I did was take measured temperature, add to it the output of my “overshoot predictor” function, and then make a control decision of whether to turn the burner on or odd by comparing it to a temperature set point and deadband. 21-Oct-20 09:16 PM The burner on/off signal was the input to the overshoot predictor function. 21-Oct-20 09:21 PM I've been avoiding the control model for the high preessure diesel fuel control for a while.. and, well, other things going on 21-Oct-20 09:22 PM What I wanted to do was command the keg to heat from room temperature to 155 F and hold, without overshooting. 21-Oct-20 09:22 PM The problem I faced was that there was a long burn but once I was approaching temperature and turn the burner off, the temperature would keep going up for the next few minutes and overshoot by, say, 4 degrees. And that’s bad because I don’t want to kill the various amylase enzymes in the barley. 21-Oct-20 09:22 PM This system would cut off the heat, coast for a bit, then the convolution time would expire, and the burner would fire in short bursts to bump the water up to temperature without going significantly over. I was able to meet my goal of regulating the brew temp to within 0.5 degrees F. 21-Oct-20 09:22 PM I’m now kind of surprised that I was doing convolution without realizing it. 21-Oct-20 09:57 PM All things considered, modeling my overshoot error as a constant step function 30 seconds long isn’t accurate. I really should use a decaying exponential, seeing as if I fire the burner now and turn it off in an impulse, the overshoot error is high, but as time passes, the measured temperature rises, and the overshoot error gets smaller. So I should estimate it as a sum of decaying exponentials. 21-Oct-20 09:57 PM I could probably reprogram this thing to fire the burner for one minute, stop, then curve fit the data as the temp coasts up to determine the overshoot exponential parameters to give me a better overshoot function. 21-Oct-20 10:26 PM @rdpierce sine as in sign 22-Oct-20 01:05 AM https://www.youtube.com/watch?v=Uk5F3rQNUkU 22-Oct-20 01:05 AM I am enjoying this far more than expected and I am the type of person who would enjoy something with that title 22-Oct-20 10:32 AM https://en.wikipedia.org/wiki/Caps_Lock#International_Caps_Lock_Day 22-Oct-20 10:32 AM fitting for me reversing keyboard code 22-Oct-20 10:32 AM I DONT THINK I COULD KEEP THIS UP ALL DAY 22-Oct-20 10:45 AM JUST KEEP THE DARNED CAPS ON 22-Oct-20 10:45 AM YOU'D HAVE NO PROBLEM WHATSOEVER 22-Oct-20 10:45 AM FITTING FOR ASM TOO 22-Oct-20 10:48 AM ASM? 22-Oct-20 10:48 AM I CAN SURE SENSE YOUR ENTHUSIASM FOR IT 22-Oct-20 10:48 AM ASM - ASSEMBLY LANGUAGE 22-Oct-20 10:49 AM AHH, I SEE 22-Oct-20 10:49 AM IT IS AMAZING HOW MUCH STRESS JUST READING A FEW LINES OF CAPS CAUSES 22-Oct-20 10:50 AM SURE IS 22-Oct-20 10:50 AM I VOICE OUT EVERYTHING IN MY HEAD 22-Oct-20 10:50 AM AND EVERYTHING SOUNDS LIKE SHOUTING NOW 22-Oct-20 10:53 AM YEP 22-Oct-20 10:53 AM FEELS LIKE HAVING A CONVERSATION OVER A FEW 10S OF METERS DISTANCE 22-Oct-20 10:54 AM EVEN EQUESTRIAN ANIMALS CAN'T HANDLE THIS FOR LONG 22-Oct-20 10:54 AM HORSES GONNA GO HOARSE AFTER THIS 22-Oct-20 10:54 AM XD 22-Oct-20 10:55 AM THAT BEING SAID 22-Oct-20 10:55 AM HERE'S ONE FOR YOU 22-Oct-20 10:55 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/2SGCbfG-F8ABD.png 22-Oct-20 10:57 AM BWAHAHAHA 22-Oct-20 10:58 AM TOO LATE! 22-Oct-20 10:58 AM I SAW THAT 22-Oct-20 10:58 AM i HAVE FAILED YOU 22-Oct-20 10:58 AM YOU BROKE THE CHAIN 22-Oct-20 10:58 AM SEE 22-Oct-20 10:58 AM YOUR 'I' IS IN LOWER CASE 22-Oct-20 10:59 AM BECAUSE i HAVE CAPS LOCK ACTIVATED 22-Oct-20 10:59 AM THAT'S HOW IT WORKS 22-Oct-20 11:00 AM SO DO I 22-Oct-20 11:00 AM I 'SHIFT' ONLY WHEN NEEDED 22-Oct-20 11:00 AM MAYBE OUR OS INTERPRETS THE INPUT DIFFERENTLY 22-Oct-20 11:00 AM THE NUMBERS AND STUFF LIKE ,.-#+ ALSO WORK LIKE NORMAL 22-Oct-20 11:01 AM I AM PRETTY SURE THAT YOU'RE USING STANDARD OPERATING SYSTEMS AND UNIVERSALLY COMPATIBLE HARDWARE 22-Oct-20 11:01 AM THIS IS AT LEAST HOW MY LINUX MINT INTERPRETS THE STUFF COMING FROM MY MODEL M 22-Oct-20 11:02 AM AND I AM NOT SCREWING UP ON UBUNTU MATE 22-Oct-20 11:02 AM DANG 22-Oct-20 11:02 AM AND I DON'T THINK LINUX MINT IS THAT DIFFERENT FROM UBUNTU 22-Oct-20 11:02 AM UBUNTU BASED IF i'M NOT WRONG 22-Oct-20 11:02 AM HENCE! 22-Oct-20 11:02 AM COMPUTERS ARE WEIRD. 22-Oct-20 11:03 AM I THINK THE ONLY PERSON HERE WHO HAS A CLAIM TO INTEROPERABILITY ISSUES WITH THEIR OS OR HARDWARE 22-Oct-20 11:03 AM IS @Conmega 22-Oct-20 11:04 AM DANG DISCORD CAN'T CAPS NAMES 22-Oct-20 11:04 AM TELL ME 'BOUT IT 22-Oct-20 11:04 AM BUT I CAN 22-Oct-20 11:04 AM AND SO CAN I 22-Oct-20 11:05 AM DOES THIS WORK? 22-Oct-20 11:05 AM NO, IT DOES NOT 22-Oct-20 11:06 AM BUT ANYWAY - CONNOR RUNS MAINFRAMES AND STUFF 22-Oct-20 11:06 AM I KNOW HIM ^^ 22-Oct-20 11:06 AM SO IF ANYONE HAS A LEGIT CLAIM TO INTEROPERABILITY ISSUES 22-Oct-20 11:06 AM IT'S HIM 22-Oct-20 11:08 AM NEEDS TO GET WEIRD AND EXOTIC HARDWARE FOR THE LULZ 22-Oct-20 11:09 AM JUST GET INTO NUCLEAR ELECTRONICS 22-Oct-20 11:09 AM ESP. THE OLD STUFF 22-Oct-20 11:09 AM I SEE THIS HAS GONE NUCLEAR QUICK 22-Oct-20 11:10 AM NEED A <100 PS RISETIME PULSER THAT OUTPUTS EXTREMLY CONSTANT CHARGE PULSES? HERE HAVE A RELAY WITH SOME MERCURY DROPS 22-Oct-20 11:10 AM I SEE THIS HAS GONE NUCLEAR QUICK @SleepyOwl Joyce YOU DON'T SEEM TO KNOW ME YET 22-Oct-20 11:10 AM YOU GOT ME 22-Oct-20 11:10 AM I MEAN IT SAYS IN YOUR STATUS 22-Oct-20 11:12 AM IT SURE DOES 22-Oct-20 11:13 AM I AM PRETTY SURE YOU FIND JOY WORKING WITH RADIOACTIVE STUFF 22-Oct-20 11:13 AM AND THAT JOY... RADIATES OUTWARDS 22-Oct-20 11:13 AM EHEHE 22-Oct-20 11:13 AM GOT ENOUGH LEAD TO STOP THAT 22-Oct-20 11:15 AM DO YOUR TEA, MILK AND EVEN WATER TASTE SWEETER THAN USUAL? 22-Oct-20 11:16 AM NO BUT MY COFFEE HAS THE LOVELY PROPERTY OF NEVER EVER GETTING COLD NO MATTER HOW LONG IT STANDS OUTSIDE 22-Oct-20 11:16 AM AND THE CLOSER YOU GET TO IT THE WARMER IT GETS 22-Oct-20 11:18 AM FINALLY TURNING ON THE HEAT, WAS 4C OUTSIDE LAST NIGHT AND 18C INSIDE.. 20C IS WHAT MACHINERY MACHINES AREECALIBRATED AT, TYPICALLY, SO I WOULD PREFER TO BE AROUND THERE, MOSTLY BECAUSE THEN I DONT NEED A JACKET, PLUS TEMPS ARE DROPPING 22-Oct-20 11:19 AM I AM AIMING FOR <20 IN MY ROOM ATM 22-Oct-20 11:19 AM JUST BORROW LARGE ENOUGH QUANTITIES OF PLUTONIUM 22-Oct-20 11:19 AM CURRENTLY 11°C OUTSIDE 22-Oct-20 11:19 AM IF IT WORKS FOR @GigaSquirrel IT WORKS FOR YOU 22-Oct-20 11:19 AM HAS NEVER SEEN PLUTONIUM, AND CERTAINLY NOT ANY SIGNIFICANT QUANTITY OF IT ENOUGH TO GLOW RED HOT ON ITS OWN 22-Oct-20 11:21 AM I HAVE SEEN SURFACES THAT HAVE BEEN COATED WITH PLUTONIUM 22-Oct-20 11:22 AM REALLY? WHERE? 22-Oct-20 11:23 AM BUT ONLY IN THE AREA AROUND A FEW NG PER CM² 22-Oct-20 11:23 AM WE USED THEM AS CALIBRATION / CHECK SOURCES FOR OUR CONTAMINATION DETECTORS 22-Oct-20 11:24 AM I SEE 22-Oct-20 12:01 PM AND THE HEATERS ARE NOW ON IN HERE, AFTER VACUUMING ONTOP (BASEBOARD HEATERS) AND CLEARING OUT FROM AROUND.. WINDOWS OPEN SO THE DUST I DIDNT GETE BURNS OFF WELL ENOUGH 22-Oct-20 12:01 PM IT WAS SUPER BAD WHEN I HAD SPILLED SOME BIODIESEL ON ONE IN THE SUMMER.. TURNED THE HEAT ON IN THE AUTUMN AND GOT SMOKE 22-Oct-20 12:01 PM BUT I DID IT AS I LEFT, SO I CAME BACK TO A STINKY HOUSE 22-Oct-20 12:01 PM THAT'LL LEARN YOU 22-Oct-20 12:01 PM WHILE CLEARING STUFF OUT, I FOUND THE DUAL STAGE PTFE BASED DIAPHRAGM PUMP FOR CHEMISTRY.. I STILL NEED TO CLEAN THE DIAPHRAGMS A BIT MORE, WITH A MORE AGGREESIVE SOLVENT 22-Oct-20 12:29 PM https://giphy.com/gifs/just-blinking-3ELtfmA4Apkju 22-Oct-20 12:36 PM WELL HELLO THERE 22-Oct-20 12:41 PM HEEEEEYYYYYYY 22-Oct-20 12:41 PM CLOSED THE WINDOWS, AND MOVED SOME OF MY STUFF BACK TO AROUND THE BASEBOARD HEATERS 22-Oct-20 12:41 PM LAUNDRY AND GROCERY SHOPPING REMAIN ON THE LIST 22-Oct-20 12:41 PM DINNER SUGESTIONS? 22-Oct-20 12:45 PM HMM 22-Oct-20 12:45 PM I RECENTLY MADE STUFFED PEPPERS 22-Oct-20 12:45 PM THEY WERE VERY GOOD 22-Oct-20 12:46 PM BELL PEPPERS? ( I THINK THE REST OF THE WORLD CALLS THEM SOMETHING DIFFERENT ) OR SOMETHING SPICIER LIKE POBLANO 22-Oct-20 12:47 PM BELL PEPPERS 22-Oct-20 12:47 PM JUST PAPRIKA HERE 22-Oct-20 12:47 PM "PAPRIKA" HERE IS THE POWDER/SPICE OF THEM 22-Oct-20 12:47 PM HUNGARIAN PAPRIKA IS SPICIER & SMOKED 22-Oct-20 12:48 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20201002_154413-0ACB7.jpg 22-Oct-20 12:48 PM feed me 22-Oct-20 12:48 PM MEATBALLS 22-Oct-20 12:49 PM YEAH WE HAD SOME MEAT LEFT OVER FROM THE STUFFING 22-Oct-20 12:55 PM I ONCE SAW A COLORFUL CIRCUIT BREAKER PANEL IN SOME MOVIE.. LIKE INSTEAD OF THE UGLY BLACK SWITCHES.. ANYONE KNOW OF SUCH A PRODUCT LINE? 22-Oct-20 12:55 PM MAY BE A EURO-SPEC THING 22-Oct-20 12:55 PM AND IT WAS MORE THAN JUST STICKERS, LIKE COLOR PER # OF AMPS 22-Oct-20 12:57 PM NEVER SEEN THAT 22-Oct-20 12:58 PM I MAY TRY TO HUNT IT DOWN MORE.. GOOGLE IMAGES IS FAILING ME 22-Oct-20 12:59 PM YOUR GOOGLE FOO MUST BE OFF 22-Oct-20 12:59 PM CONTANTUM MCB 22-Oct-20 12:59 PM MY FOO IS WEAK 22-Oct-20 12:59 PM BECAUSE EVERYTHING IS BETTER WITH WIFI https://www.walmart.com/ip/3P-WiFi-Intelligent-Circuit-Breaker-with-Energy-Monitoring-Function-Works-with-and-Home/816414423 22-Oct-20 01:00 PM OH GOD NO 22-Oct-20 01:00 PM AND NO EASILY FOUND GIF OF 'THE BIG BANG THEORY' SCENE OF "EVERYTHING IS BETTER W/ BLUETOOTH'.. 22-Oct-20 01:00 PM https://www.youtube.com/watch?v=0KXoBcQER_0 22-Oct-20 01:02 PM https://youtu.be/FoW4vXnkhJw 22-Oct-20 01:02 PM SO.. I ACTUALLY DREW OUT SOMETHING LIKE THAT... ONE TIME 22-Oct-20 01:02 PM ALSO THE WAREHOUSE13 BREAKER STATUS BOARD WITH LEDS THAT SPELL 'KNOCK KNOCK' 22-Oct-20 01:11 PM What not to install at a makerspace: 22-Oct-20 01:11 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/image0-8D15A.jpg 22-Oct-20 01:11 PM Because half the people there will want to trip the breaker off so they can play Jurassic Park and turn the power back on. 22-Oct-20 01:15 PM .... IS THERE A PROBLEM WITH THAT? 22-Oct-20 01:26 PM "The Best Tacos in Reykjavik" was not a sign I could resist many years ago. I had never previously and will never again have paprika on tacos. They were the best tacos because they were the only tacos. 22-Oct-20 01:37 PM Reykjavik? 22-Oct-20 01:37 PM Not a place I thought I'd hear about again ha! 22-Oct-20 02:15 PM SO, I GUESS A MORE MODERN VERSION OF THE BLACK/GRAY STUFF IS FLAT WHITE, WITH A VIEWING WINDOW DOOR 22-Oct-20 02:15 PM +WIFI 22-Oct-20 02:18 PM WELL THAT'S BORING 22-Oct-20 03:04 PM SO, DINNER IS HALF WAY BETWEEN THOSE THINGS.. GOING WITH ENCHILADAS 22-Oct-20 03:04 PM CHICKEN 22-Oct-20 04:24 PM WOW, WHAT HACKEREY.. SO THERE ARE EXPANSION PORT VERSIONS OF THE CHIP, THIS ISNT ONE, YET I WAS STILL COMING ACROSS INSTRUCTIONS ON SETTING PORT4.. AND THE PROG WHICH IS STROBED DURING THIS EFFORT IS NOT CONNECTEED TO ANYTHING.... THEY USE IT AS A HACK TO OUTPUT TO THE LOW NIBBLE OF PORT2 AND IGNORE THE HIGH.. THE LOW GOES TO A DEMUXER... WHICH MAPS THE COLUMNS.. THERE WERE STANDARD READS/WRITES TO P2 WITH MASKS, SO I FIGURED THAT'S HOW IT WAS BEING DONE 22-Oct-20 04:24 PM COOL TRICK OR HORRIBLE HACK, YOU DECIDE 22-Oct-20 04:24 PM I COULD EASILY SEE A COMPILER APPLYING THIS TRICK 22-Oct-20 04:24 PM I WAS HALF BANGING MY HEAD, WITH C OMMENTS IN THE DISASSEMBLY SAYING Y U TALKING TO PORT4, NO WORKIE 22-Oct-20 04:24 PM ONLY TOOK 3 DAYS TO FIGURE IT OUT 22-Oct-20 05:06 PM UGH, OUT OF ONE HOLE TO THEN FALL INTO ANOTHER 22-Oct-20 06:47 PM HELLO EVERYONE 22-Oct-20 07:11 PM HEYO 22-Oct-20 07:20 PM stops using caps 22-Oct-20 07:20 PM so fun fact - two days ago I was at the colocation datacenter belonging to a major ISP here 22-Oct-20 07:20 PM so Singapore has a company that manages pretty much most if not all of the major fiber networks here called NetLink Trust 22-Oct-20 07:20 PM including DCs 22-Oct-20 07:20 PM as I was returning my keycard and all to the NOC (Network Operations Center) 22-Oct-20 07:20 PM You had NOC folks and folks from NetLink get into an argument 22-Oct-20 07:20 PM because the NetLink folks didn't even know or remember which MDF room they were supposed to go 22-Oct-20 07:20 PM so NOC was like: "No way, nuh uh not letting you have the keys" 22-Oct-20 07:20 PM In the midst of all that, I returned my keycard 22-Oct-20 07:20 PM When I got home... 22-Oct-20 07:20 PM Why do I have an extra... oh no 22-Oct-20 07:20 PM Rack key was still with me 22-Oct-20 07:20 PM you know what's the best part? NOC hasn't even called me since two days ago 22-Oct-20 07:25 PM "our" (previous job) NOC was renamed to The Command Center and such.. they still kept The War Room (a physical room where meetings were held, adjascent with a viewing window to the CC) 22-Oct-20 07:27 PM speak of the devil 22-Oct-20 07:27 PM NOC just called me 22-Oct-20 07:27 PM 2 days though 22-Oct-20 07:27 PM it's a LOT of time for someone to make a copy of rack keys and stuff they shouldn't have 22-Oct-20 07:30 PM mold it 22-Oct-20 07:30 PM I actually just moved all of my lockpicking stuff today 22-Oct-20 07:30 PM was by a window I am replacing soon 22-Oct-20 07:31 PM I mean I could go to a keymaker now and duplicate the key 22-Oct-20 07:31 PM if I had bad intentions 22-Oct-20 07:31 PM but I am a good owl so I won't :3 23-Oct-20 01:43 AM So I returned the key 23-Oct-20 01:43 AM Guess what 23-Oct-20 01:43 AM No security incident form, nothing 23-Oct-20 01:43 AM And when I was there 23-Oct-20 01:43 AM Turned out that NOC staff signed off on the key returns forms 23-Oct-20 01:43 AM Without even checking that I had returned everything 23-Oct-20 01:43 AM So technically 23-Oct-20 01:43 AM I couldn't be faulted at all if they forgotten about the key 23-Oct-20 01:43 AM And mind you 23-Oct-20 01:43 AM This is a DC belonging to a major ISP 23-Oct-20 01:43 AM There's a whole lot of security theater though 23-Oct-20 01:43 AM They check your person and belongings for weapons, etc 23-Oct-20 01:43 AM And they also have bomb detection equipment 23-Oct-20 01:43 AM But NOC loses track of keys :/ 23-Oct-20 01:43 AM You don't need bombs and shiz to do damage at a datacenter 23-Oct-20 03:21 AM Re: CAPSLOCK I think it might depend on your keymap how linux treats you pressing shift while it's on 23-Oct-20 04:05 AM So I managed to get hold of a drill press and drilled the stainless steel 23-Oct-20 04:05 AM Drilled it with relative ease 23-Oct-20 04:57 AM goes for dinner still wearing shop goggles 23-Oct-20 04:57 AM is silly 23-Oct-20 07:23 AM Yay! Glad you got it figured out. 23-Oct-20 07:25 AM Drill press worked it quite easily 23-Oct-20 07:25 AM And it's a pretty small drill press too 23-Oct-20 07:25 AM The kind folks at the local hackerspace let me borrow it 23-Oct-20 07:30 AM Drilling stainless does not need to be hard contrary to popular belief. You just need good sharp drill bits and a drill that runs true. It’s all about finding the right speed and not letting the tip get too hot. There are some grades that are somewhat more difficult but generally most of what’s out there in your 300 or 400 series can be drilled with standard drill presses. 23-Oct-20 07:30 AM A dab of oil can help too. 23-Oct-20 07:32 AM For bits I brought the same cobalt bits I bought last week 23-Oct-20 07:32 AM They had cutting fluid on hand so I used it 23-Oct-20 07:33 AM Haha love the punch line Charles 23-Oct-20 07:33 AM drill press 23-Oct-20 07:33 AM I’ve had no issues doing steels on the press, I just go to the slowest speed and feed very slow 23-Oct-20 07:34 AM They had to install a reduction gear in this drill press 23-Oct-20 07:34 AM And our press is awwwwwful 23-Oct-20 07:34 AM According to them, the press only does 4000 and 8000 rpm 23-Oct-20 07:34 AM Hence the reduction gear 23-Oct-20 07:35 AM Wow 23-Oct-20 07:35 AM It's a small desktop drill press mainly used for drilling PCBs 23-Oct-20 07:35 AM I think ours had 470? 23-Oct-20 07:35 AM Five belt positions 23-Oct-20 07:36 AM There's only one more thing for me to do now 23-Oct-20 07:36 AM Make the holes countersunk 23-Oct-20 07:36 AM Unfortunately I had no countersinking bit on hand 23-Oct-20 07:36 AM Just use a file /s 23-Oct-20 07:37 AM Also I realize I am weaker than I thought lol 23-Oct-20 07:37 AM The spindle was seizing a few times when I was drilling 23-Oct-20 07:37 AM A more experienced person was like: "you didn't tighten the chuck enough" 23-Oct-20 07:37 AM Me: "I thought I tightened it already" 24-Oct-20 12:27 AM What's the best way to connect my house to my garage, in terms of minimal environmental protection as well as physical security, but leave the buildings separate enough that a fire or chemical issue would be as "insignificant" as if they weren't connected at all? 24-Oct-20 12:27 AM Like, some sort of skylights that aren't flammable covering the walking area between the two, a metal gate spanning the distance between them ( around 6 feet, which is a corridor from the back yard to the front) 24-Oct-20 09:46 AM Late unsolicited drill chuck advice.... if you are using one that has a key, tighten from more than one spot. Many times a drill chuck seems tight but then you try another position and get another little bit of a turn in. 24-Oct-20 09:55 AM if you're anything like me you'll check every spot twice because you're paranoid lol 24-Oct-20 09:57 AM Not a bad thing with power tools imo 24-Oct-20 09:59 AM my favourite way to use power tools is to go ask someone better than me for help 24-Oct-20 10:02 AM that works too 24-Oct-20 10:05 AM does that eventually evolve into pay someone to do it for you? 24-Oct-20 10:05 AM people were telling me to go to some industrial estates 24-Oct-20 10:05 AM and pay the folks at some machine shop to do it for me 24-Oct-20 10:05 AM but I am too shy to just go there like that and ask 24-Oct-20 10:05 AM (also - it is supposed to be my work, and I do want to learn something too) 24-Oct-20 10:08 AM I have a friend who has spent many thousands on DIY-cnc equipment 24-Oct-20 10:08 AM and is still about an order of magnitude more in spendings than what it would have cost to just pay for machinists to make everything he has made 24-Oct-20 10:09 AM @nmz787 I would think a covered walkway is what you are after, and simply have a standard deadbolt lock on each door... I actually reemoved my [attached] garage side door recently, framed over it. I was about to do house work today (window replacement) but 15+mph gusts throughout the enight and th is morning would have made dropping the new window a concern, 3 more dry days ahead so will get at it tomorrow 24-Oct-20 10:09 AM a reason for removal of the side door was actually security.. there was a huge bar and eye hooks to prevent it from opening unles syou remove the bar from the inside first - which means there was a concern before I got the house.. I just dont want to worry about that kind of thing 24-Oct-20 10:09 AM oh, also, spoke with my realtor friend (more of a syncup) a few days ago.. he'll walk me through a bit of the interior stuff on what to do and what not to do, once I finsh exterior 24-Oct-20 10:09 AM I think I will go with a wifi-able circuit breaker panel.. just from a certain brand where you can get wifi breakers or just standard ones.. at first will just tie back to my 2 other subpanels, until I can rewire the house (when needbe, and also when replacing the drywall) 24-Oct-20 11:12 AM soldered the few components (original 6mhz crystal and it's two caps) and put that Intel 8048 back in it's socket on the keyboard, now that I have the code no need to have it in the breadboard taking up space on this desk 25-Oct-20 02:39 AM What's the best way to connect my house to my garage, in terms of minimal environmental protection as well as physical security, but leave the buildings separate enough that a fire or chemical issue would be as "insignificant" as if they weren't connected at all? @nmz787 You can get tent hallways they're used at fairgrounds frequently to connect buildings 25-Oct-20 04:29 AM https://www.nature.com/articles/s41598-019-55616-7 25-Oct-20 04:29 AM maybe this should go into #resources 25-Oct-20 10:42 AM @Noxz hmm, I've already got deadbolts on each side. That's actually what annoys me. I want the convenience of being able to leave my garage and shed and house unlocked without worrying about potential thievery. 25-Oct-20 08:19 PM eermagawd I hurt... just replaced a window for a sound dampening one (including ripping off old sheathing, adding exterior insullation, new sheathing, new weather barrier, flashing the window, etc etc) 25-Oct-20 08:19 PM only 2 windows remain! 25-Oct-20 08:19 PM I've done 11? thus far 25-Oct-20 08:19 PM this one was non-operable, so there was no way to open the window to hold onto it, luckily it was only 2x4ft 25-Oct-20 08:19 PM wasnt perfectly alligned, like more eto one side, which then made squaring it up even harder 25-Oct-20 08:19 PM was basically dark when I tacked on the one center nail for pivoting it 25-Oct-20 08:19 PM and suuuuper tried 25-Oct-20 08:19 PM k, shower time 27-Oct-20 01:33 PM hrmmm.. apparently old chips need a moment to run well enough 27-Oct-20 01:33 PM was trying to diagnose an issue with a 6x inverting schmitt trigger 27-Oct-20 01:33 PM of not catching a very slow clock cycle 27-Oct-20 01:33 PM but... it's working now? 27-Oct-20 01:33 PM maybe it was just my scope probe conneeection 27-Oct-20 01:33 PM nope.. not expected output 27-Oct-20 02:05 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/DS1Z_QuickPrint1-5D117.jpg 27-Oct-20 02:05 PM missing inverted clocks 27-Oct-20 02:05 PM and my probes are connected directly to the pins 27-Oct-20 02:05 PM ... bad chip? 27-Oct-20 02:05 PM afaik I am within specs 27-Oct-20 02:32 PM missing clock 27-Oct-20 02:32 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/DS1Z_QuickPrint3-C84FD.jpg 27-Oct-20 02:32 PM .... whyyyyyyy 27-Oct-20 02:32 PM hrmm.. input voltage 1.85v .. max ON of the schmitt is 1.9v for this chip.. so it mostly works, but not quite high enough 27-Oct-20 02:32 PM best guess 27-Oct-20 02:32 PM seems to always work on the falling edge (when in the correct state) but misses a rise 27-Oct-20 02:58 PM These most recent fires in Southern California are close enough that I am getting massive chunks of...stuff...and ash 27-Oct-20 02:58 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20201027_145334_-_Copy-732DE.jpg 27-Oct-20 02:58 PM Thankfully not concerned about my area in particular but a lot of people I know have had to evacuate for these ones. 27-Oct-20 04:16 PM solved: pull up resistor 27-Oct-20 09:10 PM @LRM we have been getting ash on and off for over a month here in Fresno. Sent up to our place that survived in the burn area. Our street was saved by a change in wind direction but it burned 360 all around the neighborhood. I found little tiny burn marks all over the property where burning debris landed and smoldered. Fortunately none of them caught. The firefighters actually were trapped in our neighborhood for about a day so they just went house to house the whole time stamping out the embers. The next neighborhood over was not so lucky. Nearly a total loss. Older houses with less defensible space. Our neighborhood has strict policies about keeping the properties clean and fire resistant construction. Theirs did not. 28-Oct-20 11:07 PM I've been watching videos on build "barndominiums" the last night or two... Going with all metal exterior and metal framing sounds so much safer on the west coast 28-Oct-20 11:07 PM My only fear now is some radiocontaminated metal showing up in my (not yet purchased) kit 28-Oct-20 11:07 PM https://www.latimes.com/archives/la-xpm-1994-06-12-mn-3195-story.html 29-Oct-20 01:04 AM https://sci-hub.se/https://avs.scitation.org/doi/pdf/10.1116/1.5020128 Smallest microhouse in the world, assembled on the facet of an optical fiber by origamiand welded in the μRobotex nanofactory 29-Oct-20 01:04 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/unknown-4C8BD.png 29-Oct-20 02:42 AM Omg this picture obviously shows how a-wreck my life is... Was totally looking for brake cleaner a few weeks ago, never imagined it would be here 29-Oct-20 02:42 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/PXL_20201029_094132852-F0439.jpg 29-Oct-20 02:46 AM Bräkleen 29-Oct-20 02:47 AM Tetrachloroethylene 29-Oct-20 02:50 AM mhh the good chlorinated one 29-Oct-20 02:50 AM we can't get that here, the strongest stuff you get in a hardware store is butyl acetate 29-Oct-20 07:03 AM At least we still have acetone 29-Oct-20 07:25 AM When you really need to clean the gunk out of an espresso machine.... 29-Oct-20 07:25 AM And I thought I was going over the top by running diluted glacial acetic acid though mine.... 29-Oct-20 07:25 AM My partner just commented that the can looked like a whipped cream can. Not recommended for garnishing your latte. 29-Oct-20 08:53 AM coffee machine 29-Oct-20 08:53 AM mine is the same shell 29-Oct-20 08:53 AM slightly more manual though 29-Oct-20 09:12 AM I got fresh roasted beans yesterday.. no real progress on the roaster-in-fireplace idea, busy with actual needed housework, and the keyboard 29-Oct-20 09:12 AM super bored reversing all the logic chips (13 of them?) all strung together 29-Oct-20 09:12 AM not reversing, but tracing them w/ multimeter 29-Oct-20 09:14 AM Our office used to be a chem lab 29-Oct-20 09:14 AM They left the glassware behind 29-Oct-20 09:14 AM It’s all shoved in a cabinet above our coffee machine 29-Oct-20 09:15 AM I bet this makes one hell of a coffee 29-Oct-20 09:15 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/DSC_2180-26876.jpg 29-Oct-20 09:15 AM btw, that was my homemade fumehood 29-Oct-20 09:15 AM worked super well 29-Oct-20 09:15 AM also, that is an inert transfer.. if air touched that stuff it would turn black 29-Oct-20 09:15 AM before the next reeaction 29-Oct-20 09:15 AM the shlenk manifold is awesome, switch between vacuum and purging (argon), cycle that a few times to rid any oxygen 29-Oct-20 09:15 AM I am still weary to this day of putting glass under pressure 29-Oct-20 09:15 AM never had an accident, but yeah, it's a scary thought 29-Oct-20 11:57 AM I am still weary to this day of putting glass under pressure @Noxz If you ever need to do some pressurised stuff I've heard positive things about Duran Pressure Plus bottles 29-Oct-20 11:57 AM Basically fancy GL45 media bottles with geometries optimised for pressure 30-Oct-20 10:35 AM I didn't think I would see this sort of switching topology for SMPS 30-Oct-20 10:35 AM at least not for high powers 30-Oct-20 10:35 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/ltc7820-37844-109B5.png 30-Oct-20 10:35 AM this is all capacitive switching btw 30-Oct-20 10:35 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/unknown-8E162.png 30-Oct-20 10:35 AM the efficiency is really high here, for something that is rated to deliver 500W 30-Oct-20 10:35 AM https://www.analog.com/media/en/technical-documentation/data-sheets/7820fc.pdf <-- datasheet 30-Oct-20 10:38 AM I just saw @funranium’s tweet. This is local for me. https://twitter.com/funranium/status/1322194317390143490?s=21 30-Oct-20 10:38 AM @rdpierce how's the math going? 30-Oct-20 10:39 AM Fourier transforms in discrete and continuous time. 30-Oct-20 10:39 AM does your head hurt yet? 30-Oct-20 10:39 AM Yes. 30-Oct-20 10:39 AM Do you need a trip to the L'Hopital? 30-Oct-20 10:40 AM Linear algebra is painless by comparison, but it’s a lot of grunt work. 30-Oct-20 10:40 AM After that pun, yes. Yes I do. 30-Oct-20 10:40 AM Also planning to get married Saturday with midterms on Monday and Tuesday. 30-Oct-20 10:41 AM ooooh! 30-Oct-20 10:41 AM Congrats! 30-Oct-20 10:41 AM and all the best! ^^ 30-Oct-20 10:41 AM And arranging with a contractor for construction during my winter break. 30-Oct-20 10:41 AM Is it a courthouse wedding or full blown wedding? Either way, congrats and best of luck! 30-Oct-20 10:41 AM And filing a lawsuit against my condo association to pay for said construction. 30-Oct-20 10:41 AM We’re doing it at a friend’s apartment, who happens to have Internet clergy credentials. 30-Oct-20 10:41 AM No guests. We’re being plague-conscious. 30-Oct-20 10:43 AM that's still cool! 30-Oct-20 10:43 AM Ah, okay. Not too bad stress wise then 30-Oct-20 10:43 AM Hopefully a shindig with family and friends in 2021 to celebrate. 30-Oct-20 10:43 AM I also love how easy it is to become ordained 30-Oct-20 10:43 AM I did it during finals week my freshman year on a whim 30-Oct-20 10:43 AM Or 2022? 30-Oct-20 10:43 AM Yeah, I am as well, although I can’t exactly officiate my own wedding. 30-Oct-20 10:44 AM hopefully the plague will go away next year 30-Oct-20 10:44 AM Yes, indeed. 30-Oct-20 10:45 AM or it becomes endemic and we end up living with it like with the flu 30-Oct-20 10:45 AM I'm optimistic to it being mostly gone by summer 30-Oct-20 10:45 AM But that's assuming vaccine gets approved by year end 30-Oct-20 10:45 AM And it's an effective vaccine 30-Oct-20 10:45 AM Which are two big ifs 30-Oct-20 10:45 AM has a cup full...y empty 30-Oct-20 10:45 AM Hoping so. 30-Oct-20 10:46 AM Also hopefully it's the Johnson and Johnson one 30-Oct-20 10:46 AM Because that will be the easiest to distribute 30-Oct-20 10:46 AM Oh.... that freaked me out.... I saw “full empty” and it brought up memories of Roadside Picnic. 30-Oct-20 10:46 AM oh? 30-Oct-20 10:46 AM I'm sorry 30-Oct-20 10:47 AM Good book, just a little disturbing. 30-Oct-20 10:47 AM Thanks. 30-Oct-20 10:47 AM Well if Trump wins the election, we’ll have a vaccine by year end. Saline solution. 30-Oct-20 10:47 AM Then he can declare the pandemic cured. 30-Oct-20 10:49 AM if he wins 30-Oct-20 10:49 AM then I refer to the song you recently posted in #🎶beeps-boops🎶 30-Oct-20 10:49 AM Yeah.... 30-Oct-20 10:49 AM I imagine summer 2021 will be mostly normal here 30-Oct-20 10:49 AM 2020 was also fairly normal, just no big indoor stuff. 30-Oct-20 10:50 AM We are just starting to go back to some semblance of normal here 30-Oct-20 10:50 AM almost all industries are reopened here 30-Oct-20 10:50 AM except for things like air travel 30-Oct-20 10:50 AM or nightclubs and all 30-Oct-20 10:52 AM Singapore scares me. 30-Oct-20 10:52 AM why? 30-Oct-20 10:54 AM It’s not rational. When I was there, I kept worrying about someone leaving behind a drug stash hidden in my hotel room. Under Singapore law, there’s a mandatory legal presumption that I owned them and intended to sell them, which would result in an equally mandatory appointment with the hangman. 30-Oct-20 10:54 AM funny 30-Oct-20 10:54 AM I was just talking about that yesterday on another server 30-Oct-20 10:54 AM and yes it's silly 30-Oct-20 10:55 AM What's crazy to me is that all of our mitigation strategies more or less are useless, but we only kind of horribly died 30-Oct-20 10:55 AM I remember the customs form with the bright red letters saying “death to drug traffickers under Singapore law” 30-Oct-20 10:55 AM oh yeah 30-Oct-20 10:55 AM oh we have executions for various types of offenses 30-Oct-20 10:55 AM and guess what? 30-Oct-20 10:55 AM There aren't really things like Miranda rights here 30-Oct-20 10:55 AM you basically don't get the right to speak to a lawyer if the police aren't done with you 30-Oct-20 10:55 AM there are some rights, as accorded here 30-Oct-20 10:55 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/unknown-23748.png 30-Oct-20 10:57 AM Remind me to super keep my nose clean if I ever go to Singapore 30-Oct-20 10:58 AM murder is punishable by death here 30-Oct-20 10:58 AM and well... 30-Oct-20 10:58 AM we have had this case 30-Oct-20 10:58 AM https://ink.library.smu.edu.sg/cgi/viewcontent.cgi?article=1932&context=sol_research 30-Oct-20 10:58 AM This is arguably the largest danger area in Singapore because there have been recorded instances of false confessions being given. Fortunately, these have been discovered in a timely manner, for example, Samat Dupree's false confession to murder. However,more can be done to reduce the likelihood of a false confession being given and toclear up misconceptions that the judges have towards the making of false confessions. As with eyewitness identification, it is counter-intuitive to think that the innocentwill confess without police misconduct or coercion. In Public Prosecutor v Liew Kim Choo, Yong C.J. said, "a suspect is unlikely to make a false confession to thepolice unless he was under duress or threat." Yet psychological evidence shows that false confessions may be voluntary, stress-compliant, coerced-compliant, coerced-persuaded and non coerced-persuaded.' Asked why he confessed if he felt he was innocent, Dupree said, "I was scared. It's easy for people to ask why but I am theone who suffered in the CID."' Dupree's confession may fall within one of thecategories identified above, depending on the precise factual circumstances leadingto the confession and his disposition. 30-Oct-20 10:58 AM Police have been known to extract confession from duress here 30-Oct-20 10:58 AM another case: 30-Oct-20 10:58 AM https://www.onlinecitizenasia.com/2016/02/05/father-with-dementia-forced-to-confess-to-a-offence-by-police/ 30-Oct-20 10:58 AM many of these cases never make it onto the news, all swept under the carpet 30-Oct-20 11:00 AM Not like the US is a sparkling example of proper police conduct and exemplary criminal justice.... 30-Oct-20 11:00 AM on the topic of executions 30-Oct-20 11:00 AM https://www.refworld.org/pdfid/402f8e974.pdf 30-Oct-20 11:00 AM More than 400 prisoners have been hanged in Singapore since 1991, giving the small city-state possibly the highest execution rate in the world relative to its population of just over four million people. The execution figures include a significant percentage of foreign nationals. It is not known how many prisoners are currently on death row, but the shocking death toll from executions continues to rise. > Most of those executed were convicted of drug trafficking while others were executed for murder or firearms offences. These offences carry a mandatory death penalty, which means that trial judges have no option but to impose a death sentence on those who are convicted. A series of clauses in the Misuse of Drugs Act and the Arms Offences Act contain presumptions of guilt, conflicting with the right to be presumed innocent until proven guilty and eroding the right to a fair trial 30-Oct-20 11:00 AM Official information about the use of the death penalty in Singapore is shrouded in secrecy. Some executions, but by no means all, are reported in the press. The government does not normally publish statistics about death sentences or executions, however on rare occasions it has made information about executions available to journalists or in response to a parliamentary question. From this information Amnesty International has been able to compile statistics of executions. The organization has written to the Singapore authorities requesting official statistics but has received no response. > In September 2003, in an interview with the BBC, Prime Minister Goh Chok Tong was questioned about the number of people executed in 2003. He stated that he believed it was "in the region of about 70 to 80". When asked why he did not know the precise number he said, "I've got more important things to worry about." Two days later he retracted his statement, saying that the death penalty had in fact been carried out on ten occasions so far during the year. 30-Oct-20 11:01 AM And only some of the US has abolished the death penalty. 30-Oct-20 11:01 AM Yeah at least in the us instead of killing you they just use you as slave labour 30-Oct-20 11:02 AM I’d argue that the better states have abolished it or are in the process of doing so. 30-Oct-20 11:03 AM for context, we were talking about the unlawful possession and use of firearms 30-Oct-20 11:03 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/unknown-9C554.png 30-Oct-20 11:03 AM what if you use, attempt to, or discharge a firearm? 30-Oct-20 11:03 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/unknown-7C2E5.png 30-Oct-20 11:03 AM Singapore - Disneyland with the death penalty 30-Oct-20 11:05 AM I’ve read the essay. 30-Oct-20 11:06 AM I am going to say this 30-Oct-20 11:06 AM Although, ironically, Disneyland has the death penalty (it’s suspended now) and Disney World has it and uses it. 30-Oct-20 11:07 AM Singapore is alright if you're willing to be a consumerist drone 30-Oct-20 11:07 AM step out of that, and try to do all sorts of things, nope 30-Oct-20 11:07 AM But I don’t want to give the impression that the US is any better. 30-Oct-20 11:07 AM for starters 30-Oct-20 11:07 AM just about all of the stuff this server talks about here would be illegal in some way, shape or form 30-Oct-20 11:07 AM I have a Quantum Key Distribution project with @cenobyte and @iz 30-Oct-20 11:08 AM I’m from Chicago, where the police have warehouses that they take people to extract confessions. Typewriter cover over the head, electrical generator to the testicles, etc. have been documented. 30-Oct-20 11:08 AM there's going to be a lot of laws that make what we do illegal in some way 30-Oct-20 11:09 AM And if you’re Black, well, it’s open season for the police to shoot and get away with it. 30-Oct-20 11:09 AM oh, some might know that I have a server rack at home full of servers 30-Oct-20 11:09 AM guess what? 30-Oct-20 11:09 AM It is likely not kosher 30-Oct-20 11:09 AM I am pretty sure I broke a number of housing authority regulations 30-Oct-20 11:09 AM is bad girl 30-Oct-20 11:09 AM of course, no country is going to be perfect 30-Oct-20 11:09 AM Singapore in general is just 30-Oct-20 11:09 AM "Government knows best" 30-Oct-20 11:09 AM there are laws that are intentionally made vague 30-Oct-20 11:09 AM so that it sweeps just about the whole spectrum of stuff and arguments 30-Oct-20 11:09 AM a lot of stuff here is overregulated 30-Oct-20 11:09 AM there are a lot of draconian and archaic laws and regulations still in place 30-Oct-20 11:09 AM of course the drugs thing is a clearly obscene law by any modern standard 30-Oct-20 11:09 AM but there are archaic regulations as well that are less heard of 30-Oct-20 11:09 AM like for example, I can't legally lease a government apartment until I am 35 years of age 30-Oct-20 11:13 AM Singapore is on my “I really don’t want to go there but will if it’s for business and you’ve twisted my arm” list. Saudi Arabia is on my “not just no, hell no” list. 30-Oct-20 11:14 AM Many Middle Eastern countries are just... hell no 30-Oct-20 11:14 AM not going there 30-Oct-20 11:14 AM not even for business, sack me if you must 30-Oct-20 11:14 AM chances are pretty good that in many of these countries I'd wind up dead 30-Oct-20 11:15 AM I had a fun time in Seoul and Hong Kong. I wasn’t in Singapore for long. It just felt... weird.... 30-Oct-20 11:15 AM I mean I am planning to leave Singapore for good some day 30-Oct-20 11:15 AM it isn't a conducive place for me to do the things I want to do 30-Oct-20 11:15 AM or to even be myself as a person 30-Oct-20 11:15 AM what I do notice though, is that there's quite a disparity between expats here and locals 30-Oct-20 11:15 AM in terms of way of life 30-Oct-20 11:15 AM or how they view the place 30-Oct-20 11:15 AM I know of people from other countries like Australia for example 30-Oct-20 11:15 AM who are thinking of, or who are permanently here and have even gained citizenship 30-Oct-20 11:15 AM I can see some of the reasons why 30-Oct-20 11:15 AM in terms of relative safety for example 30-Oct-20 11:15 AM Singapore is really safe and crime free 30-Oct-20 11:15 AM also no natural disasters or any of the sort 30-Oct-20 11:15 AM you can argue that Government is even more efficient here than in places like the US 30-Oct-20 11:15 AM but then again, Singapore is a really tiny nation state compared to EU countries or the US 30-Oct-20 11:20 AM I didn't think anyone was saying the government there wasn't efficient 30-Oct-20 11:20 AM just that they thought it was reaching very far 30-Oct-20 11:21 AM as in that was what I heard 30-Oct-20 11:21 AM someone from France that I know was saying that Government was more efficient than back in France 30-Oct-20 11:21 AM etc 30-Oct-20 11:21 AM Denmark best country 30-Oct-20 11:21 AM oh? 30-Oct-20 11:21 AM I don't know if there's a best country 30-Oct-20 11:21 AM just more of: "Whose crap do you want to tolerate/can tolerate better?" 30-Oct-20 11:21 AM In any country, even in Singapore 30-Oct-20 11:21 AM you'll have die hard patriotic people 30-Oct-20 11:21 AM (in fact I daresay that nationalism and patriotism has been drilled into many Singaporeans while in school through things like civics and social studies classes even as early as primary school) 30-Oct-20 12:07 PM there is a best country 30-Oct-20 12:07 PM just no second-best 30-Oct-20 12:12 PM gahhhh 30-Oct-20 12:12 PM is afraid 30-Oct-20 12:12 PM I think my dad is going off the deep end; he's been buying into quackery and alternate medicine 30-Oct-20 12:12 PM He has been taking advice from people who call themselves "Doctors" 30-Oct-20 12:12 PM who are actually chiropractors or naturopathic doctors 30-Oct-20 12:12 PM it's become to a point where opinion or how you feel is at the same intellectual standing as scientific interrogation and skepticism 30-Oct-20 12:12 PM to which point where my dad talks about these things as belief 30-Oct-20 12:12 PM as in "If you believe that conventional medicine works so be it" 30-Oct-20 12:12 PM no dad, I do not believe in conventional medicine 30-Oct-20 12:12 PM I TRUST in the systems of rigor employed in conventional medicine 30-Oct-20 12:12 PM I TRUST, and can even be shown the data and science when it comes to various topics in medicine 30-Oct-20 12:12 PM on how our body works and how various medicines work on the body 30-Oct-20 12:12 PM Oh and it might come as a surprise to some folks 30-Oct-20 12:12 PM but If any medicine or treatment claims that it has no side effects 30-Oct-20 12:12 PM chances are... 30-Oct-20 12:12 PM it has NO EFFECT at all 30-Oct-20 12:17 PM Don't a lot of people expat to Singapore for retirement because they're relatively wealth friendly and it's safe? 30-Oct-20 12:17 PM chiropractors and naturopaths call themselves doctors in canada. 30-Oct-20 12:17 PM no, I know of people who are in their 30s or 40s who are coming here 30-Oct-20 12:17 PM not necessarily for retirement 30-Oct-20 12:18 PM wiki page: The ideology and methods of naturopathy are based on vitalism and folk medicine, rather than evidence-based medicine (EBM). 30-Oct-20 12:18 PM and yet you get people with pieces of paper calling themselves doctors 30-Oct-20 12:19 PM the thing really, is that the internet has given these folks a platform to spew whatever 30-Oct-20 12:19 PM I don't know that it's so much that 30-Oct-20 12:19 PM and with slick video editing and all, you can spout all the cow dung you want 30-Oct-20 12:19 PM and still appear professional 30-Oct-20 12:19 PM as the same folks doing so are now coming into contact with those that don't follow them 30-Oct-20 12:19 PM like it's difficult to tell if it's their circle growing into ours 30-Oct-20 12:19 PM or just bumping together more 30-Oct-20 12:20 PM I mean it all started out with my dad wanting to tackle being overweight 30-Oct-20 12:20 PM and searching Youtube for things regarding that 30-Oct-20 12:20 PM and he stumbled upon the channels of people who are chiropractic practitioners and all 30-Oct-20 12:21 PM Naturopaths learn about humors. I think that's all that needs to be said on the topic 30-Oct-20 12:21 PM Chiropractors are similarly dumb, but it's a bit more subtle there 30-Oct-20 12:23 PM on another level 30-Oct-20 12:23 PM you have things like Doctors of Osteopathy 30-Oct-20 12:23 PM person who fiddles with spine = potentially ok person who cures cancer by fiddling with spine = ummmmmmm 30-Oct-20 12:23 PM who in the US learn about medicine and all like regular doctors 30-Oct-20 12:23 PM just with osteopathy added on it 30-Oct-20 12:23 PM what I noticed is that a number of these D.Os are more willing than not to go out EBM 30-Oct-20 12:23 PM and use all sorts of alternative medicine or treatments, etc 30-Oct-20 12:23 PM I know of one who was saying that everything has a natural resonant frequency, etc 30-Oct-20 12:23 PM and by using electrical/RF signals tuned to those frequencies 30-Oct-20 12:23 PM diseases, even the likes of cancer can be cured 30-Oct-20 12:23 PM and was wanting to build such RF and signal generators or even plasma tube amplifiers for use on his patients 30-Oct-20 12:23 PM or you have people like these: https://www.youtube.com/watch?v=FXi1QmtaUQk 30-Oct-20 12:27 PM “If you want to find the secrets of the universe, think in terms of energy, frequency and vibration.” – Nikola Tesla 30-Oct-20 12:27 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/Foods-BA613.png 30-Oct-20 12:27 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/HighVibrationDietFoodPyramidSoulTruthGatew-B56EB.png 30-Oct-20 12:27 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/Screenshot-2020-05-08-at-19-C1F94.png 30-Oct-20 12:27 PM these things go on and on 30-Oct-20 12:27 PM and get eerily similar to scientology consciousness levels 30-Oct-20 12:28 PM Yeah, I'm not a big fan of DOs. It's not enough to make me not go, but it's the less rigorous route to being a physician in the US and they do in fact learn the pseudo science too even if it's like 5% of the curriculum 30-Oct-20 12:29 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/Tone_Scale-1489C.png 30-Oct-20 12:29 PM RE Dr Rashid Battar: he was saying that face masks cause oxygen deprivation and are dangerous 30-Oct-20 12:30 PM https://en.wikipedia.org/wiki/E-meter 30-Oct-20 12:30 PM QUANTUM 30-Oct-20 12:30 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/761px-Scientology_e_meter_blue-1AF7A.png 30-Oct-20 12:31 PM oooooh Quantum 30-Oct-20 12:31 PM spoooky 30-Oct-20 12:31 PM Tonight I'll try to find videos, but it's really funny to see people so convinced that masks deprive you of oxygen that they're willing to be set up on a pulse ox, and then nothing happens 30-Oct-20 12:32 PM you'd think that if face masks caused oxygen deprivation 30-Oct-20 12:33 PM Same people say the mask does nothing 30-Oct-20 12:33 PM Against viruses 30-Oct-20 12:33 PM surgeons would pass out in the operating room 30-Oct-20 12:33 PM especially doing multiple hour long surgeries 30-Oct-20 12:33 PM I'm still mad at how we're still pretending it's a droplet spreading disease 30-Oct-20 12:34 PM Wdym 30-Oct-20 12:34 PM It's airborne right 30-Oct-20 12:34 PM Yes 30-Oct-20 12:34 PM But it spreads via aerosols at the very least in addition to droplets 30-Oct-20 12:34 PM And aerosols stay airborne for hours 30-Oct-20 12:34 PM Rather than dropping to the ground after seconds 30-Oct-20 12:34 PM The 6 feet thing is purely for droplets 30-Oct-20 12:35 PM Droplets would be more infectious tho I assume 30-Oct-20 12:35 PM It's still pretty hard to find controlled studies on masks vs no masks as far as transmission 30-Oct-20 12:35 PM lots of anecdotes and lots of "well physically it blocks a lot of stuff" 30-Oct-20 12:35 PM The important thing is that you're basically guaranteed to spread it if you're in a room with a patient zero for hours at a time 30-Oct-20 12:35 PM Regardless of masks 30-Oct-20 12:36 PM I mean masks aren't 100% bulletproof things 30-Oct-20 12:36 PM but basically any comparison of groups with / without masks will also have many other variables 30-Oct-20 12:36 PM Well what kinda masks 30-Oct-20 12:36 PM There have been studies in healthcare settings 30-Oct-20 12:37 PM What I mean is that you still spread aerosols with masks. Just less. And they stay there if you don't actively ventilate a room and give it rest periods 30-Oct-20 12:37 PM even a N95 or NIOSH particulate respirator isn't going to be 100% bulletproof 30-Oct-20 12:37 PM Which people don't do 30-Oct-20 12:37 PM @SleepyOwl Joyce nobody is saying 100% 30-Oct-20 12:37 PM I'm sure a room full of people wearing N95s is gonna be pretty safe 30-Oct-20 12:37 PM even any statistical advantage of t-shirt folded masks has still not been shown afaik 30-Oct-20 12:37 PM vs none 30-Oct-20 12:38 PM I know of people who use masks as if it were a defense against catching COVID 30-Oct-20 12:38 PM R u sure I'm pretty sure I saw a study on cloth masks 30-Oct-20 12:38 PM (yes - obviously still wear masks even if the best you've got is a shoddy cloth, because it's probable that it helps...) 30-Oct-20 12:38 PM Let me see if I can find it 30-Oct-20 12:38 PM but I haven't seen anything that actually measured the effect 30-Oct-20 12:39 PM At least in healthcare settings I believe it was shown surgical masks have a clear benefit but regular cloth wasn't too clear 30-Oct-20 12:39 PM I've heard rumblings that bandanas and t shirts don't actually help because they turn droplets into aerosols, but I don't know how true it is 30-Oct-20 12:39 PM Though that's for indoors 30-Oct-20 12:39 PM Outside it's definitely better than nothing 30-Oct-20 12:39 PM so much so to which point even I noticed a middle-aged woman take off her mask and sneeze then put it back on in the train 30-Oct-20 12:39 PM Surgical masks are definitely better than cloth 30-Oct-20 12:39 PM Which are definitely worse than N95s without the respirator 30-Oct-20 12:40 PM Honestly at this point I'm surprised the us hasn't been able to distribute quality masks to large parts of the population 30-Oct-20 12:40 PM Like where does all the money go 30-Oct-20 12:41 PM honestly I am surprised that you're surprised about that lol 30-Oct-20 12:41 PM yeah 30-Oct-20 12:41 PM lol 30-Oct-20 12:41 PM especially with how the governance has downplayed the effects of COVID-19 30-Oct-20 12:41 PM they're totally able 30-Oct-20 12:41 PM Maybe surprised isn't the best word 30-Oct-20 12:41 PM just not willing or interested 30-Oct-20 12:41 PM Disappointed 30-Oct-20 12:41 PM and you can see people who actively REFUSE masks 30-Oct-20 12:42 PM For cloth masks I wonder if layering them has any benefit 30-Oct-20 12:42 PM That was the plan, but someone doesn't believe the virus is real so he blocked it 30-Oct-20 12:42 PM or how people think that COVID-19 is a hoax, or just nothing more than catching "the sniffles" 30-Oct-20 12:43 PM Like a thin bandana vs like 3 layers of thick cloth might have a pretty big difference 30-Oct-20 12:43 PM Well to most individuals 30-Oct-20 12:43 PM covid is far from the worst contagious thing they may encounter 30-Oct-20 12:43 PM it's just that the likelihood of encountering it is much higher 30-Oct-20 12:43 PM it's not just the US really 30-Oct-20 12:43 PM https://www.youtube.com/watch?v=ADuM80DRFCM 30-Oct-20 12:43 PM If we're being real it's dumb that we don't wear masks during flu season all the time 30-Oct-20 12:44 PM Yeah... 30-Oct-20 12:44 PM @Mezmorizor biological arms race where we lose tho 30-Oct-20 12:44 PM Tho at least there is a vaccine for the flu 30-Oct-20 12:44 PM flu evolves to hot weather flu only or something 30-Oct-20 12:44 PM every season is flu season 30-Oct-20 12:44 PM Maybe, but afaik nobody actually knows why flu season is winter 30-Oct-20 12:45 PM I understand if all these happens in the US 30-Oct-20 12:45 PM And it's the opposite in the tropics 30-Oct-20 12:45 PM but in the UK, Europe, etc 30-Oct-20 12:45 PM Their hot and wet season is flu season rather than everyone else's cold and dry 30-Oct-20 12:45 PM Consensus seems to be "people get closer together" but idk seems kinda flimsy tbh 30-Oct-20 12:45 PM you have people protesting against lockdowns, claiming COVID to be a hoax or that the severity is overblown 30-Oct-20 12:46 PM All the explanations I've heard are flimsy 30-Oct-20 12:46 PM I am ngl I think there's only One Solution™️ to this 30-Oct-20 12:46 PM And realistically it's probably a lot of things, so you end up overfitting your model when you try to model it 30-Oct-20 12:46 PM This coming election, don't vote Democrat or Republican 30-Oct-20 12:46 PM vote for ICBM 30-Oct-20 12:46 PM ICBM is fair and equal and doesn't discriminate 30-Oct-20 12:47 PM Yeah finding one reason might be difficult 30-Oct-20 12:47 PM Could be a variety of factors 30-Oct-20 12:48 PM obviously has a glass fully empty at this point 30-Oct-20 12:49 PM The glass is broken tbh 30-Oct-20 12:58 PM do you know what I love about this server 30-Oct-20 12:58 PM Pessimism? 30-Oct-20 12:59 PM you guys are having a political discussion and we don't need to intervene even once, because everything stays civil and nice 30-Oct-20 12:59 PM I mean pessimism is a given nowadays 30-Oct-20 01:00 PM is a rebel 30-Oct-20 01:00 PM needs to find ways to be optimistic 30-Oct-20 01:00 PM how dare you! 30-Oct-20 01:02 PM Well I think a lot of us are pretty like minded, partly because support of Trump is inversely proportional to education, which in itself says something. 30-Oct-20 01:03 PM Perhaps we might all be in our own ideological echo chambers 30-Oct-20 01:03 PM And so as people who are say, Trump supporters for example 30-Oct-20 01:03 PM That's actually the troubling part 30-Oct-20 01:03 PM No means of active, rational discourse 30-Oct-20 01:03 PM Any attempt at such just becomes inflammatory and high blood pressure inducing 30-Oct-20 01:03 PM I mean for many of the stuff like whether to wear masks or not 30-Oct-20 01:03 PM Each side is just preaching to their own choir 30-Oct-20 01:05 PM I tend to think that people smart enough to play with high vacuum, radiation detectors, plasma, ion beams, and assorted technology have a low tolerance for a world leader who suggested injecting bleach. 30-Oct-20 01:07 PM conversely I think our local safety guy sees a few too many parallels between how disposable people are seen as being in the interests of greatness 30-Oct-20 01:12 PM I don't know how safety people do it honestly 30-Oct-20 01:12 PM So many obvious problems you're just not allowed to fix 30-Oct-20 01:12 PM Like I'm sure 3 decades from now I'm going to see commercials about you being entitled to compensation if you worked with carbon nanotubes and got mesothelioma 30-Oct-20 01:12 PM But no, engineering controls cost money and they're too new for OSHA to make recommendations 30-Oct-20 01:14 PM Ironically, this isn’t a server whose mission has anything to do with ideological beliefs, and yet we’ve not had anyone speak up about how we should all take hydroxychloroquine and MAGA. 30-Oct-20 01:14 PM @idmb I find it interesting that the Scientology E-meter is essentially 1/3 of a polygraph machine. 30-Oct-20 01:20 PM well hey, learning to spoof one and show your enlightenment is a transferable skill 30-Oct-20 01:20 PM Which calls into question the value of polygraphs, although they are used today for hiring and monitoring of employees in certain fields involving clearances. 30-Oct-20 01:21 PM I thought in most circles there wasn't any question about how bad they are? 30-Oct-20 01:22 PM Then why do the feds still use them? 30-Oct-20 01:22 PM The three letter acronym agencies use them quite a bit. 30-Oct-20 01:22 PM people still use torture even though it has been shown to give lots of bad data... 30-Oct-20 01:22 PM Singapore is known to still use polygraphs 30-Oct-20 01:22 PM In criminal proceedings 30-Oct-20 01:22 PM Or in high security clearance jobs 30-Oct-20 01:24 PM wikipedia has a great answer to why they might still be used 30-Oct-20 01:24 PM The average cost to administer the test in the United States is more than $700 and is part of a $2 billion industry 30-Oct-20 01:24 PM why are standardized tests still a thing? The GRE? SAT? ACT? 30-Oct-20 01:24 PM I own a vintage analog polygraph machine. It’s pretty cool, although the capillary pens and ink make an awful mess. I found it at a military surplus store and figured it would be fun to take apart and restore. 30-Oct-20 01:24 PM education experts know they're bunk 30-Oct-20 01:24 PM I think the idea with the clearances is that it's another way to get people to tell the truth if they don't know they're bunk 30-Oct-20 01:25 PM I mean the fact we're even discussing the matter of whether they are bunk or not 30-Oct-20 01:25 PM Yeah, the placebo effect is probably quite strong 30-Oct-20 01:25 PM Then I got a textbook on how they’re actually administered and scored. And I was pretty horrified. 30-Oct-20 01:25 PM @SleepyOwl Joyce I don't think we're discussing that 30-Oct-20 01:25 PM Means that quite a number of people already know it's bunk 30-Oct-20 01:25 PM A lot of people will confess if they see the machine. 30-Oct-20 01:25 PM Or if they are told they failed, they will confess. 30-Oct-20 01:26 PM They may be statistically useful, sure. 30-Oct-20 01:26 PM but it's like a drug trial with some statistical benefit but also lots of harm, I guess 30-Oct-20 01:28 PM we need to make something that can read your neural activity and deduce your thoughts 30-Oct-20 01:29 PM My concern is that the more you know about the psychological principles behind them, the less likely you are to pass them. 30-Oct-20 01:29 PM I am not sure about that 30-Oct-20 01:34 PM The modern premise is that people have sympathetic and parasympathetic reactions to things that cause them danger. And if failing a polygraph means that someone could go to jail or get fired from that job, that poses a danger and can elicit a fight or flight style reaction. 30-Oct-20 01:34 PM Modern polygraphy practice recognizes that people also are afraid of false accusations. 30-Oct-20 01:34 PM So “Is your name Joyce?” will elicit less response than “Did you give the source code to the Russians?” for anyone, guilty or innocent alike. 30-Oct-20 01:34 PM What modern polygraphy practitioners do is a pre-interview where they ask questions about whether you’ve, say, stolen from an employer. They want to find a “probable lie” question. 30-Oct-20 01:34 PM So “Prior to this month, have you ever stolen from an employer?” is going to make most people sweat. Well, what about the time I walked out the door with a pen? Oh my gosh, I’m going to fail this question and be fired! 30-Oct-20 01:34 PM If you confess to minor employer thefts, the examiner is going to start getting very disapproving and try to pressure you to agree to a narrower probably lie that is still vague, like “Did you ever steal anything of value from an employer?” 30-Oct-20 01:34 PM The lie behind the polygraph is that the examiner expects a reaction on that question and having one is good. 30-Oct-20 01:42 PM I see 30-Oct-20 01:42 PM They bracket the probable lie question with the relevant question of “Did you give source code to the Russians this month.” 30-Oct-20 01:42 PM Interesting! 30-Oct-20 01:44 PM A guilty person is going to see that question as more dangerous. A not guilty person psychologically fixates on the employee theft question. 30-Oct-20 01:44 PM But... if you know the game, you’ll know that the probable lie question is harmless. 30-Oct-20 01:44 PM I also wonder about certain self-righteous people who feel like they could never do wrong, or people who think superficially and don’t go down the rabbit hole of “is time spent screwing around on the web during work hours stealing from my employer?” 30-Oct-20 01:46 PM Time for me to learn the game and learn how to evade criminal polygraph tests then 30-Oct-20 01:46 PM is a bad girl 30-Oct-20 01:46 PM I wonder how it would work on people who have muted or cannot feel emotion towards things 30-Oct-20 01:51 PM There are also guilty knowledge tests, which I think may be more likely to work. 30-Oct-20 01:51 PM Answer no to each of the following questions: 30-Oct-20 01:51 PM Was John Doe shot with a .22LR? Was John Doe shot with a .357 magnum? Was John Doe shot with a 9 mm? Was John Doe shot with a .40 S&W? Was John Doe shot with a .45 ACP? 30-Oct-20 01:54 PM No, no, no, no, no 30-Oct-20 01:55 PM If someone responds to one of these, and it’s how the person was murdered, and the details were not released to the public, that’s telling. 30-Oct-20 01:55 PM They’d add more questions, like was he shot in the bedroom, in the bathroom, in the kitchen, in the office, etc. 30-Oct-20 01:56 PM No, no, no, no, ... 30-Oct-20 01:56 PM I mean hey you asked me to answer no to each the following questions 30-Oct-20 01:56 PM Just doing what you tell me to do 30-Oct-20 02:26 PM Anyway, the idea behind polygraph examinations is problematic, to say the least. 30-Oct-20 02:26 PM And it’s concerning that they are still used for government jobs. 30-Oct-20 02:31 PM The people I know who have had to undergo them for security clearances all say that the polygraph part of the process is intended to be a way to deny people who are potential security risks without having to have any actual concrete evidence of that 30-Oct-20 04:43 PM Rings have arrived. We are go for wedding tomorrow. 30-Oct-20 05:22 PM Hope it is nice for you 30-Oct-20 05:22 PM Rough time for all that kind of thing 31-Oct-20 12:39 AM Mom. 31-Oct-20 12:39 AM Seriously. 31-Oct-20 12:39 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/3d15b3f4-c909-494c-9e8b-08fb0f0254ce-40D90.png 31-Oct-20 12:39 AM You think prayer will protect you from a typhoon? 31-Oct-20 12:39 AM I don't know lol 31-Oct-20 12:39 AM sigh. 31-Oct-20 10:21 AM why then are they called 'Acts of God' ? 31-Oct-20 10:24 AM Ever see the movie “the man who sued god” ? 31-Oct-20 04:03 PM not that I can recall, but the title seems familiar 31-Oct-20 04:17 PM re-checking the traces of the pins of the logic chips on the keyboard.. and yeah, I had a few goofups already 31-Oct-20 04:17 PM minimal re-typing, though.. just corrections & verifying 31-Oct-20 05:00 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/DSC_2169-19F8F.JPG 31-Oct-20 05:00 PM Although not too many chips, and I've kind of memorized them all already, some pinouts, too... but both ontop & bottom will help till I get this project completed 31-Oct-20 05:00 PM -and- .. what good is a label printer if you never use it? 31-Oct-20 07:44 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20201031_164950-34610.jpg 31-Oct-20 07:44 PM Congrats! 31-Oct-20 07:45 PM And you should have seen her face when she saw the Chernobyl Live Love Laugh coasters. 31-Oct-20 07:45 PM Thanks! 31-Oct-20 07:45 PM And you should have seen her face when she saw the Chernobyl Live Love Laugh coasters. are you (un)dead yet? 31-Oct-20 07:49 PM She loved it. 31-Oct-20 07:49 PM Dark humor + irony for the win. 31-Oct-20 07:51 PM haha 31-Oct-20 07:51 PM was it also a spoooky marriage? 31-Oct-20 07:58 PM Well when we got to our friends’ condo, there were lots of skeletons and spider webs in the front yard. I figured they decorated just for us. 31-Oct-20 07:59 PM haha 31-Oct-20 08:22 PM hola 31-Oct-20 08:23 PM Hi! 31-Oct-20 08:23 PM How's you? 31-Oct-20 09:16 PM Exhausted but feeling good. Midterms next week, though, and I need to get caught up with hw Sunday. 31-Oct-20 09:16 PM How are you? 31-Oct-20 09:22 PM all the best with homework and midterms! 31-Oct-20 09:22 PM tries to think of some pun, but fails 01-Nov-20 04:00 AM Congrats! 01-Nov-20 05:45 AM Thanks! 01-Nov-20 05:47 AM Congrats! 01-Nov-20 06:24 AM so I was operating radio earlier 01-Nov-20 06:24 AM went up on top of a hill 01-Nov-20 06:24 AM then I realized 01-Nov-20 06:24 AM I can actually clearly see the proposed transmitting station for QKD experiment 01-Nov-20 06:24 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/unknown-FE67E.png 01-Nov-20 06:24 AM I think I found a new receiving station location 01-Nov-20 06:24 AM the problem with the other location was that it was only half the height of the transmitting location 01-Nov-20 06:24 AM and is in a densely packed estate 01-Nov-20 06:24 AM in terms of laser safety, there are no buildings, or many people from this hill 01-Nov-20 06:24 AM so the chances of shining a laser into someone's home is much greatly reduced 01-Nov-20 06:24 AM there's now only one problem 01-Nov-20 06:24 AM carrying tables, batteries, optical receive setup up a hill 01-Nov-20 06:24 AM I could do it, it's just quite a climb 01-Nov-20 06:24 AM hmmmm 01-Nov-20 06:24 AM how big of a drone would I need to deliver 15 - 20 kilos worth of stuff 01-Nov-20 06:45 AM Thanks @GigaSquirrel 01-Nov-20 06:49 AM Oi! 01-Nov-20 06:49 AM you just got married, what are you doing online? :P 01-Nov-20 06:50 AM What do you expect him to be doing? 01-Nov-20 06:50 AM Lovey-dovey with the wife? 01-Nov-20 06:51 AM enjoy the short span in marriage where it's fun before everything goes downhill 01-Nov-20 06:51 AM wow... I see you're such the optimist, tsk tsk 01-Nov-20 06:54 AM Always 01-Nov-20 06:59 AM has legs of jelly after hiking up and down a hill and walking almost 13 km after that 01-Nov-20 06:59 AM might secretly be a masochist; why do I do this sort of stuff 01-Nov-20 07:46 AM XD 01-Nov-20 09:15 AM We’ve been together for 14 years so I think we will be fine. 01-Nov-20 09:24 AM That's quite a long time together ^^ 01-Nov-20 09:57 AM @SleepyOwl Joyce Get a hand truck with air filled wheels to haul your gear up and down the hill 01-Nov-20 09:57 AM Air filled instead of solid rubber is key if you will be on natural surfaces 01-Nov-20 05:16 PM feels like a bad girl 01-Nov-20 05:16 PM I only just found out my ISP is coming down to replace the ONT today 01-Nov-20 05:16 PM has a half filled 42U rack of servers 01-Nov-20 05:16 PM I mean they gave me a static IP and that servers are allowed 01-Nov-20 05:16 PM I just don't think their definition of server and my definition of server is the same 01-Nov-20 05:16 PM I am thinking that their definition of server is like a game server or some home NAS or file server accessible from outside 01-Nov-20 05:16 PM Not stuff like multiple websites, or DNS services, etc 01-Nov-20 05:16 PM heheh 01-Nov-20 08:44 PM Comcast sent me a nastygram when they said I hit a data limit 01-Nov-20 08:44 PM I'm like, "what data limit" 01-Nov-20 08:44 PM And they tried to tell me I have only 1TB / month 01-Nov-20 08:44 PM I called them the next day and told them that was the last bill I planned on paying lol 01-Nov-20 08:45 PM huh. 01-Nov-20 08:46 PM I have radio link service now and they're much cooler 01-Nov-20 08:46 PM I see 01-Nov-20 08:46 PM also did you see 01-Nov-20 08:46 PM https://arstechnica.com/information-technology/2013/05/fios-customer-discovers-the-limits-of-unlimited-data-77-tb-in-month/ 01-Nov-20 08:47 PM Hah amazing. In NY I had FIOS and it was great. Not availabile here though 01-Nov-20 08:47 PM I reaaaallly wish the FTC had the stones to go to war with telecoms over the use of the word "unlimited" but unfortunately our politicians are completely on board with NewSpeak 01-Nov-20 08:50 PM well for my ISP they did say 01-Nov-20 08:50 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/unknown-445D9.png 01-Nov-20 08:50 PM "large scale game server" 01-Nov-20 08:50 PM "file servers" 01-Nov-20 08:50 PM at what scale is large scale? 01-Nov-20 08:50 PM how big can a file server be? 01-Nov-20 08:51 PM Rsync a RAID array like I did and you will find out 01-Nov-20 08:51 PM My ISP is run by anarchists now so the customer service is really good 01-Nov-20 08:53 PM has a Supermicro CSE-847 36 drive bay server 01-Nov-20 08:53 PM I mean I am only doing VM backups and stuff like that 01-Nov-20 08:54 PM I wouldn't be surprised if my ISP heated their building with DMCA letters in their furnace 01-Nov-20 08:54 PM I am thinking of switching ISPs soon 01-Nov-20 08:54 PM switch? 01-Nov-20 08:54 PM ehhhh maybe not 01-Nov-20 08:54 PM but I have two fiber connections running into the property 01-Nov-20 08:54 PM I am thinking of getting a 10 Gb line on the other unused line 01-Nov-20 08:54 PM then get a bunch of IPv4 and IPv6 allocations, etc 01-Nov-20 08:54 PM I could then use the 1 Gb line as a fallback 01-Nov-20 08:57 PM Instead of paying the installation fee for our setup, we gave them a series wound electric vehicle motor. 01-Nov-20 08:57 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/20200414_155801-84697.jpg 01-Nov-20 08:57 PM lol nice! 01-Nov-20 08:57 PM tbh, while I don't need 10 Gb, not at the moment, I need the IP address allocations, and if I want to get IP address allocations with this provider I am looking at, I need to get a 10 Gb line, no way around it 01-Nov-20 08:59 PM So if you want to do something with gigabits of uplink, give the internet archive a call and they might cut you a sweet deal. Last I heard they pay for 50 gigabit symmetrical service, but they mostly do downloads and very little uploads so they're not sure what to do with the other upload bandwidth. 01-Nov-20 08:59 PM For some reason they can only get symmetrical service from their ISP. 01-Nov-20 09:00 PM huh. 01-Nov-20 09:00 PM tbh I wonder what it would take to get >10 Gb connections into where I am 01-Nov-20 09:02 PM Here in ameristan that would be very expensive 01-Nov-20 09:02 PM Our isps are very anti-competitive 01-Nov-20 09:04 PM for my case I am running some servers and services for others as well 01-Nov-20 09:04 PM if I wanted to go >10 Gb... 01-Nov-20 09:04 PM I need a serious number of customers lol 01-Nov-20 09:04 PM hmmmm interestingly 01-Nov-20 09:04 PM my current ISP can't do IPv6 apparently 01-Nov-20 09:04 PM only IPv4 01-Nov-20 09:04 PM what age are we living in again?? 01-Nov-20 09:13 PM Last I checked, post industrial but maybe post truth now 01-Nov-20 09:13 PM ~There is no IPV6 in ba sing se~ 02-Nov-20 02:41 AM I found this image of an Indian ICBM online 02-Nov-20 02:41 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/51236_nukeeeeee_1551964351734-BAC44.png 02-Nov-20 02:41 AM there is only one thing that immediately comes into my mind 02-Nov-20 02:41 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/angrygandhi-911C1.png 02-Nov-20 04:06 AM https://www.youtube.com/watch?v=4ega5Rcct2s 02-Nov-20 06:36 AM ikr 02-Nov-20 07:04 AM is glad 02-Nov-20 07:04 AM laser got shipped 02-Nov-20 07:04 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/unknown-92865.png 02-Nov-20 07:04 AM this arrived too 02-Nov-20 07:04 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/20201102_225045-28472.png 02-Nov-20 07:04 AM Going to be using a STM32 for power regulation and monitoring stages of my laser driver 02-Nov-20 07:04 AM actually - two STM32s 02-Nov-20 07:04 AM One for handling user interface, touch screen, etc 02-Nov-20 07:04 AM the other for the actual control of the push-pull flyback converter 02-Nov-20 07:04 AM I expect to generate as high as 1000v for the flashlamp 02-Nov-20 07:04 AM so yeah, regulation, voltage and current monitoring has to work well 02-Nov-20 09:09 AM Anyone have some recommendations for lab PSUs? The one I have been using for a couple years was reclaimed by the person who gave it (loaned it...I suppose) to me and now I gotta fill that void. Nothing too crazy needed. 02-Nov-20 09:11 AM search online or wherever for some used dual channel power supply? 02-Nov-20 09:11 AM there's a lot dual channel, 3A, 30V lab supplies from GW Instek and others 02-Nov-20 09:11 AM (of course, I am making the assumption that it is some regular power lab PSU and not the HP rackmounted lab PSUs designed for a lot of power output) 02-Nov-20 09:15 AM @SleepyOwl Joyce those chips are so great for this application, you can use only one timer to create the correct signal to control a pushpull setup, configure a deadtime, emergency break, and even use dma to modify automatically the duty cycle and create a quasi pure sine wave without the stm32 having to execute any line of code 02-Nov-20 09:16 AM Yeah I am aware 02-Nov-20 09:16 AM I just never really explored the timers and stuff on these 02-Nov-20 09:22 AM Got my turbopump on that setup with one timer controlling the 3 pwm output and an other one the output duty cycle if you happen to want some help 02-Nov-20 09:22 AM Oh cool! I'll ping if I need help then! Thanks for the offer! 02-Nov-20 09:22 AM for this application I need two timers 02-Nov-20 09:22 AM basically two SMPS 02-Nov-20 09:22 AM one for flashlamp capacitor bank, the other for simmer supply 02-Nov-20 09:22 AM wait... do I really need two? 02-Nov-20 09:22 AM I just remembered I bought a 12V to 15 kV flyback module of sorts 02-Nov-20 09:25 AM Sure, no problem! 02-Nov-20 09:25 AM no no no I am confusing stuff 02-Nov-20 09:25 AM If you have 2 different frequencies you need 2 otherwise you can use one 02-Nov-20 09:25 AM needs coffee 02-Nov-20 09:25 AM I confused my simmer and trigger supplies 02-Nov-20 09:25 AM gahhhh 02-Nov-20 09:25 AM it's 1:26 AM though... 02-Nov-20 09:25 AM do I really want coffee now? 02-Nov-20 09:26 AM Starting to better understand your username 02-Nov-20 09:26 AM My sleep schedule is all sorts of screwed 02-Nov-20 09:26 AM I end up sleeping a few times a day lol 02-Nov-20 09:26 AM yes I get my 8 hours of sleep... spread out across the day 02-Nov-20 09:29 AM Not sure if that works that way 02-Nov-20 09:29 AM I guarantee you... it doesn't 02-Nov-20 09:29 AM especially since I don't know what might be doing in the daylight hours 02-Nov-20 09:29 AM or what work needs of me 02-Nov-20 09:29 AM the only time I really get continuous, undisturbed sleep is when I am physically exhausted 02-Nov-20 09:29 AM at which point I don't respond to anything 02-Nov-20 09:29 AM work can call me, I miss all calls, etc 02-Nov-20 09:34 AM Yeah doesn't feel that healthy, but you do you I guess 02-Nov-20 09:35 AM before I entered the working world I was mostly active from the mid afternoon to the early morning 02-Nov-20 09:35 AM now that I am working... ehhhhh, it's all a messy juggling act 02-Nov-20 09:35 AM (why do you think they call me an owl) 02-Nov-20 09:36 AM Hence why I am getting more and more the username haha 02-Nov-20 09:37 AM and I gave in 02-Nov-20 09:37 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/20201103_013507-7C390.jpg 02-Nov-20 09:39 AM Got to love the smell of coffee and solder in the mor.. Midnight? 02-Nov-20 09:39 AM yes 02-Nov-20 09:39 AM needs to order a bunch of HV diodes 02-Nov-20 09:39 AM interestingly it seems like the laser I bought has no trigger pin 02-Nov-20 09:39 AM so I am having to do some series triggering 02-Nov-20 09:47 AM Series triggering? What's that? 02-Nov-20 09:50 AM so instead of having a wire wrapped around the flashlamp for the triggering 02-Nov-20 09:50 AM I am looking at directly connecting my 15 kV trigger supply to the lamp 02-Nov-20 09:50 AM circuit wise I am looking at something like this 02-Nov-20 09:50 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/unknown-0E7C6.png 02-Nov-20 09:50 AM so effectively the trigger supply looks to be in series to the flashlamp 02-Nov-20 09:50 AM compared to a more conventional external triggering circuit 02-Nov-20 09:50 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/unknown-651F3.png 02-Nov-20 09:50 AM where there's a wire wrapped around the flashlamp to ionize the gas in the flashlamp and "trigger" it 02-Nov-20 09:56 AM Ahh yeah, got it, thanks! 02-Nov-20 09:57 AM tbh for what I am doing 02-Nov-20 09:57 AM I could really just buy some Chinese laser driver module 02-Nov-20 09:57 AM they sell a lot of these for laser tatoo removal devices, etc 02-Nov-20 09:57 AM but I want to test the efficacy of something else 02-Nov-20 10:00 AM I know co2 laser power supply do 15kv for pretty cheap but less fun tinkering 02-Nov-20 10:01 AM I mean the reason I spec'ed out 15 kV is because that's what the manufacturer of the laser said the min. trigger voltage will be 02-Nov-20 10:01 AM tbh... 02-Nov-20 10:01 AM I am kinda skeptical 02-Nov-20 10:01 AM because of the size of the flashlamp 02-Nov-20 10:07 AM Surprised you don't have a variable hv power supply to test the breakdown 02-Nov-20 10:08 AM 15kV is not that surprising even for smaller lamps 02-Nov-20 10:08 AM unless u mean its too low lol 02-Nov-20 10:09 AM I mean we'll see 02-Nov-20 10:09 AM how big is the lamp 02-Nov-20 10:09 AM 1 sec 02-Nov-20 10:09 AM size:135 * 75* 6mm 02-Nov-20 01:09 PM only had coffee not too long ago and is sleepy again 02-Nov-20 01:09 PM ughhhh screw this I am going to bed 02-Nov-20 04:53 PM so who's excited for tomorrow? 02-Nov-20 05:00 PM we will all go together when we go... 02-Nov-20 05:00 PM what a comforting fact that is to know... 02-Nov-20 06:16 PM every1 is like worried for tmrw 02-Nov-20 06:16 PM tbh its probably gonna just be more boring than we expect 02-Nov-20 06:17 PM I'm more worried about the weekend 02-Nov-20 06:17 PM im prepared to be hella wrong tho 02-Nov-20 06:17 PM It won't be called tomorrow anyway 02-Nov-20 06:17 PM And even if it did we've pretty consistently seen the trouble makers car pool to hotspots on weekends to cause trouble 02-Nov-20 06:32 PM it will be called tomorrow 02-Nov-20 06:32 PM it's just not meant to be 02-Nov-20 06:47 PM ISP came and did their thing 02-Nov-20 06:47 PM they didn't seem bothered with the server rack 02-Nov-20 06:47 PM in fact I know what the ONT replacement was for 02-Nov-20 06:47 PM my dad seems to have accidentally subscribed to their phone plan 02-Nov-20 06:47 PM OR 02-Nov-20 06:47 PM it's now a default inclusion 02-Nov-20 06:47 PM My dad: There is no reason for me to get the land line even though is free. 02-Nov-20 06:47 PM I know what to do... 02-Nov-20 06:47 PM time for a PBX server of sorts 02-Nov-20 07:09 PM ohhhh 02-Nov-20 07:09 PM my laser is arriving today not Thursday 02-Nov-20 07:09 PM that was fast. 02-Nov-20 08:07 PM Yea lasers!! Hahaha. My K40 and the 120 watt one are sitting in storage 02-Nov-20 08:08 PM mine is dropping power again 02-Nov-20 08:08 PM just under 9W from 11W when they owe us 13W 02-Nov-20 08:08 PM I'm still waiting for the output coupler 02-Nov-20 08:08 PM spectra physics bad 02-Nov-20 08:09 PM I will be disassembling it later 02-Nov-20 08:09 PM also my droplet beam seems great 02-Nov-20 08:09 PM but 02-Nov-20 08:09 PM is not quite in the middle of the chamber 02-Nov-20 08:09 PM which kind of sucks because it means my VMI stuff is semi distorted 02-Nov-20 08:10 PM That sounds like something you'll need to fix at some point 02-Nov-20 08:10 PM in future laser experiments of mine I was wondering how easy it would be to make some sort of laser diode pumped Nd:YAG laser 02-Nov-20 08:10 PM I think I might actually get by not fixing it 02-Nov-20 08:10 PM the old VMI had a giant grounding plate that shifted things arbitrarily 02-Nov-20 08:10 PM nobody cared 02-Nov-20 08:15 PM I think that really depends on how much you know about cavity design tbh 02-Nov-20 08:15 PM Assuming we mean from scratch when we say make here 02-Nov-20 08:15 PM Beyond the obvious stuff like not growing your own rod 02-Nov-20 08:16 PM I have a lot of readup to do if I want to attempt building a cavity 02-Nov-20 08:17 PM In that case, hard 02-Nov-20 09:47 PM [sigh] Spectra Physics. Sorry @idmb 02-Nov-20 10:09 PM Are any of the laser companies not terrible? 02-Nov-20 10:09 PM Because they all seem terrible 02-Nov-20 10:15 PM No complaints about coherent ? 02-Nov-20 10:15 PM What about thorlabs, they sell some lasers 02-Nov-20 10:22 PM I'm not counting Thorlabs because then I'd also have to include smaller companies like Toptica and there's so many of those that at least one is bound to be good 02-Nov-20 10:22 PM Though I guess we haven't had any complaints with toptica 02-Nov-20 10:22 PM Though we don't have a standard relationship with them so I don't have a baseline 02-Nov-20 10:22 PM No experience with coherent, but if they are good, fair 02-Nov-20 10:34 PM laser arrived! 02-Nov-20 10:34 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/1b9d9fc6-edb6-4aa7-a1e1-541b7775b35e-17A5E.png 02-Nov-20 11:23 PM Coherent is solid and dependable. Not necessarily fancy, but solid. Toptica has an excellent modular system that lets you swap modules around, though that does get people in trouble now and then for not putting things back to original state when they hand off lasers. Spectra...sigh. When their stuff works well, they're amazing. They're like 1980's Italian sports cars of lasers. So. Much. Repair. 03-Nov-20 07:29 AM There’s no real competition for the quanta day though is there? So sometimes you have to go spectra? 03-Nov-20 07:50 AM As you know I'm not a big fan of continuum, but the surelite is comparable to quanta ray specs wise 03-Nov-20 07:50 AM And they also have 75J per pulse YAGs too if you ever need that for some reason 03-Nov-20 08:04 AM Quanta Ray was purchased outright by Spectra decades ago, becoming a wholly owned brand under their umbrella. 03-Nov-20 08:04 AM 75J per pulse daaang 03-Nov-20 10:41 AM @Mezmorizor this amuses me every time: 03-Nov-20 10:41 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/unknown-9D0F6.png 03-Nov-20 10:48 AM Beautiful 03-Nov-20 11:02 AM sort of 03-Nov-20 11:02 AM that's the west germany turbopump in the doping chamber 03-Nov-20 11:02 AM responding to a change in forevacuum pressure 03-Nov-20 11:02 AM the gate valves are closed. 03-Nov-20 11:07 AM Oh. That looks bad then 03-Nov-20 11:11 AM it's fine, when I back the doping chamber with the source chamber all is well 03-Nov-20 11:11 AM big turbopump go brr 04-Nov-20 09:46 AM Darn it. I'm at CH Distillery and it's closed. 04-Nov-20 09:46 AM I wanted to buy some of the Malort Spritz that @funranium tweeted about. I figure it was appropriate given the bad taste the election is leaving in my mouth. 04-Nov-20 09:46 AM Scared to look at the results.... 04-Nov-20 09:48 AM TLDR half of you have had a great four years 04-Nov-20 09:49 AM About to stress eat on the country's best cheeseburger. 04-Nov-20 09:54 AM honestly it can go any way at this point 04-Nov-20 09:54 AM no one knows 04-Nov-20 09:54 AM we wait it out and see what comes out of it 04-Nov-20 09:55 AM I'd give Biden a significant edge at this point outside of court based suppression, but not such a big lead that it's a sure thing 04-Nov-20 09:56 AM honestly what I am worried about, and it isn't off the tables 04-Nov-20 09:56 AM is that votes get challenged all the way up to SCOTUS 04-Nov-20 09:57 AM Oh that's going to happen at this point 04-Nov-20 09:57 AM That's why I added that caveat 04-Nov-20 09:57 AM Because who knows how that'll actually shake out 04-Nov-20 09:57 AM But WI isn't officially called but is Biden 04-Nov-20 09:58 AM still hard to say who will win overall 04-Nov-20 09:58 AM might as well toss a coin 04-Nov-20 09:58 AM though I dare say a coin slightly weighted to Biden 04-Nov-20 10:00 AM Apparently I mathed wrong 04-Nov-20 10:00 AM So coin flip 04-Nov-20 10:00 AM For whatever reason I thought MI/GA and nevada was enough 04-Nov-20 10:00 AM But it's not 04-Nov-20 10:01 AM if Biden is going to secure a win 04-Nov-20 10:01 AM Wait no it is 04-Nov-20 10:01 AM I just missed states somehow 04-Nov-20 10:01 AM I'd put it like 70-30 at this point 04-Nov-20 10:01 AM Nevada, Wisconsin and Michigan look like the best bet 04-Nov-20 10:01 AM Any state on the table is a coin flip 04-Nov-20 10:01 AM But more permutations get biden there 04-Nov-20 10:01 AM Georgia is a lot better bet than it seems, but yes, that's probably most likely 04-Nov-20 10:02 AM so I am basing data from the current data from Associated Press 04-Nov-20 10:02 AM The remaining votes in Georgia are predicted to be like 80% Biden 04-Nov-20 10:02 AM and looking at the current percentages and number of votes counted 04-Nov-20 10:02 AM Wisconsin and Michigan seems quite safe imo 04-Nov-20 10:03 AM Wisconsin is effectively called to Biden 04-Nov-20 10:03 AM It's not official yet 04-Nov-20 10:03 AM But he has a 20k lead with less than a thousand votes remaining 04-Nov-20 10:04 AM ¯\_(ツ)_/¯ 04-Nov-20 10:04 AM Assuming the data being fed to these agencies before the official count is correct anyway 04-Nov-20 10:04 AM but whoever wins aside 04-Nov-20 10:04 AM I'm kinda disappointed 04-Nov-20 10:04 AM current AP stats show 48.2% of the vote to the incumbent 04-Nov-20 10:05 AM I am too 04-Nov-20 10:05 AM Don't want to get too into it, but man, this should not have been a close election 04-Nov-20 10:05 AM Meanwhile in reality tie is one of the most likely outcomes at this point 04-Nov-20 10:06 AM I have been talking to people about my thoughts on US politics for a bit 04-Nov-20 10:06 AM the fact that in the last election, you had 46.1% of votes going to Trump 04-Nov-20 10:06 AM that itself was a sign of something going horribly wrong 04-Nov-20 10:06 AM as I would say - Trump is not the problem. 04-Nov-20 10:06 AM He is the symptom of a problem 04-Nov-20 10:06 AM His antics, failures, etc were all set in place by the gears of the machinations put in place 04-Nov-20 10:06 AM and like it or hate it, the machinations worked as they should 04-Nov-20 10:09 AM canadian liberals won with like 33% of the vote 04-Nov-20 10:09 AM conservatives had 34% 04-Nov-20 10:09 AM quebec (once upon a time) separatists who are really just also conservatives had 7.6% 04-Nov-20 10:09 AM and then the "radical left" folks had 19.7% and 3.45% 04-Nov-20 10:09 AM so the winner won with 1% less popular vote, but the lefter people had 56% of votes 04-Nov-20 10:12 AM haha imagine having presidents who didn't win the popular vote 04-Nov-20 10:12 AM wait... 04-Nov-20 10:13 AM there's one thing that bugged me about the incumbent's presidency 04-Nov-20 10:13 AM and I think it would bug a fair number of people here too 04-Nov-20 10:13 AM policies regarding climate 04-Nov-20 10:13 AM and how certain states, especially those with heavy involvement into coal and non-renewable energy are voting, etc 04-Nov-20 10:13 AM and also the recent handling of the pandemic, and how people still think that it's a hoax 04-Nov-20 10:13 AM or nothing more than just the sniffles and that we're overblowing the severity 04-Nov-20 10:13 AM nothing more than just the sniffles In fact while the current POTUS didn't say it as such, his response was as good as dismissing it as nothing more than a trivial illness 04-Nov-20 10:13 AM this all feels contrary to science and what is supposedly the more rational response to things 04-Nov-20 10:59 AM Country’s best cheeseburger acquired and consumed. 04-Nov-20 10:59 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/image0-8F70A.jpg 04-Nov-20 10:59 AM Yum? 04-Nov-20 10:59 AM Au Cheval. Good stuff. 04-Nov-20 10:59 AM Now you've made me want that 04-Nov-20 10:59 AM gib! 04-Nov-20 10:59 AM and this is why Joyce is a fatty 04-Nov-20 11:00 AM There’s normally a multi hour line to eat there. The one advantage of COVID is that they now sell them to go. 04-Nov-20 11:00 AM https://chicago.eater.com/2015/4/15/8393037/au-cheval-burger-week-the-hot-dish#0 04-Nov-20 11:01 AM doesn't normally crave food 04-Nov-20 11:02 AM I’m not trying to be a bad influence. 04-Nov-20 11:02 AM You're not! 04-Nov-20 11:02 AM I'm just a weirdo when it comes to diet and food 04-Nov-20 11:02 AM I don't eat at regular times haha 04-Nov-20 11:02 AM Sometimes even skipping breakfast and lunch and maybe even dinner 04-Nov-20 11:02 AM but then she snacks a lot 04-Nov-20 11:02 AM probably why she's overweight albeit slightly 05-Nov-20 11:16 AM oh man, this SN74LS195 is driving me nuts... why cant I figure it out.. I think they are exploiting some undocumented thing with it 05-Nov-20 11:33 AM Did you observe any transition that was against the SN74LS195's behavior as described in it's datasheet? 05-Nov-20 12:05 PM almost? 05-Nov-20 12:05 PM SH/LD_ becomes low at a point, meaning it now Loads - but it stays active[low] for more than one clock cycle, and I think it then goes back to shift mode - but I havent traced the logic diagram of the datasheet enough to prove this 05-Nov-20 12:05 PM but I think that is what is going on 05-Nov-20 12:05 PM that after one clock (transition of low->high, according to datasheet) it reverts to Shift 05-Nov-20 12:36 PM so, no, that's not it, which means the other thing it may be is even more confusing.. I think I may have missed a connection somewhere, but at the same time, I didnt.. I have tripple+ checked 05-Nov-20 02:53 PM ... so, I yanked the chip, breadboarded it, and it functions as expected.. there must be something else on the board that sinks the signal after 8 clock cycles 05-Nov-20 02:53 PM yet, where I was measuring, I was getting good full voltage throughout 05-Nov-20 02:53 PM I would suspect I would have seen the voltage drop 05-Nov-20 02:53 PM meh.. 05-Nov-20 04:18 PM I think I found the source.. a flip-flop triggers a Clear - which I was scoping but never saw the voltage fall below the required amount - anywho, soldereed the chip back in and will scope some more 05-Nov-20 05:53 PM direct overriding clear was the magic phrase in the datasheet, btw 05-Nov-20 05:53 PM but, still confused as to why I am measuring a decent amount of voltage, which, I presume gets sinked to ground to create the low 05-Nov-20 06:11 PM https://www.youtube.com/watch?v=iXSuJN0LVwQ 05-Nov-20 06:15 PM purple line is the one in question, that made me think it did not drop low enough.. 05-Nov-20 06:15 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/DS1Z_QuickPrint11-1C77F.jpg 05-Nov-20 06:15 PM min of 4.20.. still plenty high to be considered high by that shift chip.. but apparently it goes from that through a transistor in a flip-flop that sinks to ground? 05-Nov-20 06:15 PM anywho, solved? 05-Nov-20 06:47 PM https://www.youtube.com/watch?v=I3v4aNxfhAA 06-Nov-20 02:11 AM min of 4.20.. still plenty high to be considered high by that shift chip.. but apparently it goes from that through a transistor in a flip-flop that sinks to ground? @Noxz Two thoughts on this: An SN74LS195 is using low power schottky ttl-gates. Under any operable Vcc 4.2 volts is plenty and can safely considered high on any input pin. If the input pin is clocking/latching something, a short transition to low may be the cause. You may want to trigger on the negative edge of the purple trace and choose a much faster timebase. You may need to ground your probe close to the IC and also probe the signal close to the ic. However it seems as if the load on the purple signal decreases on the negative edge of the blue signal and increases on the 4th negative edge of the yellow signal. This may indicate, that there is some action that you think to be caused by the purple signal is actaully caused by the other signals and/or that external circuitry that depends on the blue/yellow signals loads the purple signal. I haven't looked closely to the SN74LS195 though, so I can't give a good guess. 06-Nov-20 10:15 AM I may move that ground closer and see what I get.. currently it's tapped on a breadboard where I am giving it a clock/data cycle. The connections are somewhat interesting, let me Rubby Ducky Debugging this some.. D<->QD, QD_<->SH/LD_ .. so by the 4th clock cycle from a high bit, it then triggers itself to reload - with the same exact data, but the point is it then keeps all the same bits (A<->QA, etc).. The same QD output enabled a 4 bit counter, that is preset to 0x8, and on the 8th cycle, the Carry Over is set high, and this + QD go into a flip-flop with the same clock cycle, thus on the falling edge of both of those it flip, the output of which becomes low - QD is connected at this output so thus it brings that high signal low, bringing SH/LD back into Shift mode, disables the timer, etc etc 06-Nov-20 10:15 AM it's a way to say: set one bit high, then you have 3 bits of function setting to hold on the shift register - for 8 clock cycles for data incomming/outgoing 06-Nov-20 10:15 AM it's all pretty logical, I was just super frustrated with that reading of 4.2v not actually being Clear 06-Nov-20 10:15 AM oh, slight goofup, the flipflop doesnt bring QD low, but sets clear__ low, thus zeroing the shift register complete, which brings Q/QD low 06-Nov-20 10:15 AM k, dog walking time 06-Nov-20 10:15 AM that whole routine basically takes up like 1/3 of the chips.. lots of logic chips left to actually figure (I have it all sketched, but I havent cracked the actual flow just yet) 06-Nov-20 04:25 PM https://twitter.com/realDonaldTrump/status/1324855496722026498 so, uhh 06-Nov-20 04:25 PM what's going on down there? 06-Nov-20 04:27 PM oi, I thought there was a no politics rule? 06-Nov-20 04:27 PM heh, actually, maybe that was in other servers, but yeah, I'd vote for no politics 06-Nov-20 04:28 PM ehh, some people existing is regarded political in the us, so Idk about that 06-Nov-20 04:29 PM anywho, I'm part way through watching this, I am sure you all know the channel? https://www.youtube.com/watch?v=gPMGEHtdb4E 06-Nov-20 04:29 PM (though phrase it as no election news and im in favor) 06-Nov-20 04:30 PM the remainder of the build was released recently, but yeah, I love the channel, scientific glassware 06-Nov-20 04:31 PM @Noxz if you don't want politics you can mute #off-topic-thats-sometimes-on-topic 06-Nov-20 04:32 PM hah, I hear you, I've simply seen it as a rule in nearly all other servers, even off-topic 06-Nov-20 04:32 PM Keeping this scientific and apolitical as possible: It’s a direct statistical sampling consequence when one candidate tells their followers that mail in voting is bad, vote in person, the other candidate tells their followers that COVID is bad, vote by mail, and votes received by mail are counted last. 06-Nov-20 04:33 PM Yeah... 06-Nov-20 04:33 PM So some people are trying to ascribe to foul play that late counted votes are falling predominantly one way, when there’s a very logical explanation. 06-Nov-20 04:35 PM it's the perfect scenario to intentionally set up and get people to believe you, too 06-Nov-20 04:36 PM Also, the US is highly split by party in rural vs. urban, and the urban counties typically have more ballots to process and take longer to complete their counts. 06-Nov-20 04:45 PM well I thought the complaints were specifically within the big + important urban counties 06-Nov-20 04:48 PM Venturing out of neutrality, I am thinking along the same lines as @idmb that Trump, by launching a campaign to delegitimize mail in voting, created an environment where he could get an initial lead and then make a case to stop the count. Because mail in votes predominantly favor his opponent, getting courts to throw out mail in votes will disproportionately favor him. Further, his friend DeJoy, as Postmaster General, had been engaging in systematically slowing down mail delivery. There are legit political and economic reasons to do so. A lot of people want to see the USPS fail and get privatized. But this also happens to adversely impact his opponent’s ballots. I wonder, had courts not intervened, if more ballots would have been delayed. 06-Nov-20 04:49 PM It's gonna be a fun mess for the rest of our lives, hearing about it. 06-Nov-20 04:49 PM 2024 and so on will be equally suspenseful 06-Nov-20 04:51 PM The complaints are centered on urban areas that primarily vote Democrat. These areas are predominantly Biden, and mail in ballots will likely skew even more so towards Biden. 06-Nov-20 04:51 PM The exception seems to be Arizona. Some urban areas that happen to be Trump territory seem to be slow to report, and Biden’s lead there is shrinking. But of note, you aren’t seeing Dems screaming fraud in AZ and demanding that the count be stopped. The President has quite a double standard demanding that he’ll win AZ if all the votes are counted, but wanting to stop the counts where he is losing. 06-Nov-20 04:54 PM it's extra confusing because all the rules are state-specific 06-Nov-20 04:56 PM That is one of the “features” of US democracy. Federalism. 06-Nov-20 04:56 PM I know people who do military war games, and they’ve been war gaming various scenarios where people play shenanigans with state law. Things can get ugly. The current laws are very much broken. Issues like what happens when different branches of state government certify different slates of electors to the EC. 06-Nov-20 04:56 PM Technically, the state legislature sets the rules, so one of the playbook possibilities is that a Republican legislature and governor can be convinced their state’s election was rigged, and cannot be fixed, so a slate of Trump electors should be appointed. 06-Nov-20 05:18 PM Yeah, the biggest thing the past ~12 years in US politics has shown is that aspects of the constitution are broken and only work because politicians acted in good faith 06-Nov-20 05:53 PM "x is bad" "but it's in the constitution" 06-Nov-20 07:49 PM @Mezmorizor that’s the view of the war gamers. 06-Nov-20 07:49 PM Someone attempted to use a little known provision to try to block Florida votes after Bush v. Gore. 06-Nov-20 07:49 PM Gore himself essentially made it clear that he’d rather have a peaceful transition than a constitutional crisis. 06-Nov-20 07:49 PM And it went nowhere. Congress certified the electoral vote count for Florida and Bush won. 06-Nov-20 08:02 PM So some people are trying to ascribe to foul play that late counted votes are falling predominantly one way, when there’s a very logical explanation. @rdpierce also I daresay - you don't have to demonstrate or show fraud to cause chaos in an election 06-Nov-20 08:02 PM as long as you can make people think or believe there's fraud, etc 06-Nov-20 08:02 PM then stuff gets cray cray 06-Nov-20 08:09 PM Well, yes. 06-Nov-20 08:09 PM Especialy when people fall back on confirmation bias. 06-Nov-20 08:13 PM and when you know, there are people on both sides of the Left-Right spectrum that would consider violence to be necessary if the candidate they support loses 06-Nov-20 08:13 PM or when 06-Nov-20 08:13 PM https://apnews.com/article/protests-vote-count-safety-concerns-653dc8f0787c9258524078548d518992 07-Nov-20 08:42 AM CNN called PN hence the election for Biden. 07-Nov-20 08:44 AM How can they do that, trump called dibs 07-Nov-20 08:47 AM OK, every major news organization except Fox called PN for Biden. 07-Nov-20 08:47 AM https://www.nytimes.com/interactive/2020/11/03/upshot/network-race-call-tracker.html 07-Nov-20 08:48 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/image0-297C8.png 07-Nov-20 08:48 AM Screenshot taken just now 07-Nov-20 08:50 AM Interesting because FOX was one of the first to call AZ for Biden. Fox's call is made by their news desk, which is much more neutral than their late night commentators. 07-Nov-20 09:06 AM honestly I don't know - I see a uphill battle coming up 07-Nov-20 09:06 AM not with the challenges against voting processes, etc 07-Nov-20 09:06 AM but with the division, hatred, polarization, etc 07-Nov-20 09:09 AM Oh yeah, that’s still a problem. I recall someone commenting that on Wednesday, with Biden leading and likely to win, Dems were still grieving. Because it shouldn’t have been this close. 07-Nov-20 09:09 AM There’s also the possibility that McConnell will still have the Senate and may make Biden’s life miserable. Like try to hold open Supreme Court seats for 2, 3, 4 years.... 07-Nov-20 09:09 AM Block federal judge appointments, etc. 07-Nov-20 09:11 AM yeah 07-Nov-20 09:11 AM but as I have said before - Trump is just a symptom of a problem 07-Nov-20 09:11 AM a reflection of the fault lines of society 07-Nov-20 09:11 AM many of these problems have festered for decades 07-Nov-20 09:11 AM honestly - I am just hoping that Biden can keep the world situation more stable at least 07-Nov-20 09:11 AM especially with the tensions with Iran, China, etc 07-Nov-20 09:16 AM I'm doubtful, but a bit of police reform might be on the table 07-Nov-20 09:17 AM And I have linear algebra to get back to.... 07-Nov-20 09:17 AM https://twitter.com/ziyatong/status/1324085091329593345?s=21 07-Nov-20 09:18 AM and well I get slightly richer 07-Nov-20 09:18 AM cause my dad now owes me some cash for losing the bet 07-Nov-20 12:39 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/image0-D628F.jpg 07-Nov-20 12:50 PM I saw a cringe worthy quotation on Instructables of that scene used to describe the feeling of what happens when one sticks one’s hand in the box of a laser cutter for a DIY body mod. Uhhh. That would be a nope. 07-Nov-20 12:50 PM Oh god 07-Nov-20 02:44 PM https://twitter.com/number10cat/status/1324991569229996032?s=21 07-Nov-20 03:48 PM Laser engraving finger nails was / is a thing that shouldn’t be 07-Nov-20 03:49 PM shudders 07-Nov-20 04:47 PM NO NO NO 07-Nov-20 06:45 PM Full agreement there. 07-Nov-20 06:45 PM And... the instructable in question goes well beyond finger nails. It’s pretty gruesome. 07-Nov-20 10:16 PM shudders too 07-Nov-20 10:47 PM Only in Chicago 07-Nov-20 10:47 PM https://twitter.com/cmkueppers/status/1325188519518736385 07-Nov-20 10:48 PM huh I wonder if the trump tower here had anything noteworthy 07-Nov-20 10:48 PM it's getting renamed 08-Nov-20 10:17 AM ohhh darn 08-Nov-20 10:17 AM https://www.theguardian.com/culture/2020/nov/08/alex-trebek-host-jeopardy-dies 08-Nov-20 08:00 PM I’m now wondering if, the next time I write a check, I’ll add an e^jωt to the end of the dollar amount out of habit. 08-Nov-20 08:11 PM things I've learned about since moving to Illinois: malort and old style 08-Nov-20 09:11 PM i > j 08-Nov-20 09:11 PM j > i 08-Nov-20 09:11 PM fite me 08-Nov-20 09:23 PM Whoa whoa whoa. I think we can all agree k > i or j. 08-Nov-20 10:20 PM engineers gonna engineer 08-Nov-20 10:25 PM is that not the point? 08-Nov-20 10:25 PM if an engineer doesn't engineer, then are they really an engineer? 08-Nov-20 11:01 PM Do they have the knack? 08-Nov-20 11:04 PM "Can they lead a normal life?" 08-Nov-20 11:04 PM "No. They'll be an engineer." 09-Nov-20 10:18 AM YOU SLANDER ME! I am a physicist, not an engineer. 09-Nov-20 10:21 AM @funranium I don't see how @idmb's statement was saying you were an engineer 09-Nov-20 10:23 AM anything other than i is straight engineer vibes 09-Nov-20 10:23 AM maybe he meant a joke like k > j > i 09-Nov-20 10:25 AM I mean the only reason we don't use i in EE is because I is already used for current 09-Nov-20 10:30 AM somehow we make do 09-Nov-20 10:32 AM I know this is heresy, but I actually do like j better. A much less common letter for math symbols. 09-Nov-20 10:33 AM Permute them vectors, yo. 09-Nov-20 10:37 AM deals with more stupid stuff 09-Nov-20 10:37 AM so I got myself one of these displays 09-Nov-20 10:37 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/unknown-6C5DB.png 09-Nov-20 10:37 AM these are programmed over serial 09-Nov-20 10:37 AM so your UI design file would just be programmed in the onboard MCU 09-Nov-20 10:37 AM I try to program a simple test UI 09-Nov-20 10:37 AM which just writes the word Test 09-Nov-20 10:37 AM Nope 09-Nov-20 10:37 AM Nope 09-Nov-20 10:37 AM can't do it, the software just cannot detect the display at any baud rate 09-Nov-20 10:37 AM I see my USB - TTL converter sending data out, I can see the pulses on the scope 09-Nov-20 10:37 AM but nope 09-Nov-20 10:37 AM the computer software doesn't see it 09-Nov-20 10:47 AM Is the display's picture from you or internet? 09-Nov-20 10:51 AM this is my own image 09-Nov-20 10:57 AM Have you checked the wiring? Rx and Tx correctly set up? Using the Nextion ide? 09-Nov-20 10:59 AM I have, and yes using the Nextion Editor 09-Nov-20 10:59 AM I've already swapped TX and RX so many times now 09-Nov-20 10:59 AM and I can verify that I measure something at the serial connector itself 09-Nov-20 11:03 AM what micro controller are you using ? 09-Nov-20 11:04 AM Just FT232RL directly connected to the Nextion 09-Nov-20 11:05 AM So you are sending commands from a terminal from your computer right ? 09-Nov-20 11:05 AM No, just the Nextion Editor 09-Nov-20 11:05 AM trying to upload a test HMI file here 09-Nov-20 11:06 AM Did you put the hmi file in the sd card ? 09-Nov-20 11:07 AM not yet 09-Nov-20 11:07 AM but that's not the point is it? 09-Nov-20 11:07 AM I am supposed to be able to use serial to program the file 09-Nov-20 11:08 AM from my understanding you program your interface in the SD card and then you use serial to tell the display go on that page, display that value 09-Nov-20 11:11 AM Selecting Upload will launch an Open dialog to select a *.TFT file before the Upload to Nextion Device dialog. Ensure the Nextion is connected via serial (typically via USB to TTL adapter) before upload or the Port may not be available to select. Auto search feature will look for your Nextion’s reply to the connect instruction, but realize that data is being sent on all serial ports that are searched (and may interfere with the other connected serial devices). A better choice is to select the correct Port and Baud Rate. Proper configuration of Serial adapters, Windows drivers, device conflicts, etc is beyond the scope of Nextion support and remains the domain of user responsibility to know their used Operating System and devices. > Once Nextion has responded to the connect instruction, the upload process will begin. Do not interrupt this process until completed. If the process has been interrupted, resetting the serial port may be required. When a partial *.TFT file has been uploaded and uploading over serial is no longer an option, then the user will need to upload via the microSD method. Refer to Section 5 of this guide. 09-Nov-20 11:14 AM is you FT232RL set to the right voltage 3.3V or 5V ? 09-Nov-20 11:15 AM 5V 09-Nov-20 11:15 AM From that text it seems possible although I've not found anyone being able to do it beside the manufacturer 09-Nov-20 11:15 AM have you tried another computer ? 09-Nov-20 11:21 AM I don't have another computer on hand 09-Nov-20 11:21 AM lies 09-Nov-20 11:21 AM has a 42U rack of servers sitting behind her 09-Nov-20 11:21 AM more accurately: I don't have another machine that I can use as a dev machine 09-Nov-20 11:22 AM I use server nodes as 19” rack shelves 09-Nov-20 11:22 AM They’re nice and deep and very rigid 09-Nov-20 11:22 AM that should be enough usb ports to wear out your ftdi usb connector lol 09-Nov-20 11:23 AM I don't want to run other stuff on servers 09-Nov-20 11:23 AM I use server nodes as 19” rack shelves @idmb oh? 09-Nov-20 11:24 AM Well they mount securely at both ends 09-Nov-20 11:24 AM So I put two in a 4-sided rack 09-Nov-20 11:24 AM So I can put my half width stuff without ears 09-Nov-20 11:24 AM so you're just putting stuff on top of servers then 09-Nov-20 11:24 AM On the rack 09-Nov-20 11:24 AM Yeah lol 09-Nov-20 11:24 AM They’re shelves. 09-Nov-20 11:25 AM I know there is issues with FT232RL clones that can't detect devices correctly, are you using an original one ? 09-Nov-20 11:26 AM it's a Sparkfun FT232RL breakout 09-Nov-20 11:26 AM so unless Sparkfun got their hands on counterfeit chips 09-Nov-20 11:26 AM I am pretty sure it's original 09-Nov-20 11:26 AM There is one thing about my setup I haven't yet mentioned though 09-Nov-20 11:26 AM I run Linux, and since Nextion Editor only supports Windows 09-Nov-20 11:26 AM I am running a Windows VM 09-Nov-20 11:26 AM and then passing my FT232RL through to the VM 09-Nov-20 11:28 AM Yeah should be an original one, my guess would be to put the tft file on the sd card and trying to send commands to it with a terminal and see if it's receiving anything 09-Nov-20 11:28 AM on the scope, I can see that the Nextion Editor is trying to find the display 09-Nov-20 11:28 AM and on the FT232RL TX 09-Nov-20 11:28 AM I can see the data pulses 09-Nov-20 11:28 AM on the FT232RL RX however 09-Nov-20 11:28 AM I see constant 5V, no data pulses 09-Nov-20 11:32 AM I guess you already verified the screen model in the setup ? 09-Nov-20 11:33 AM yeah 09-Nov-20 11:33 AM this is a 3'5" display, basic series 09-Nov-20 11:33 AM does the upload window display an error ? 09-Nov-20 11:34 AM Connection failed Forced interrupt! 09-Nov-20 11:35 AM baud is set to 9600 ? 09-Nov-20 11:37 AM yeah, although the Nextion Editor tries to auto-detect baud 09-Nov-20 11:37 AM and I can confirm that based on scope observations 09-Nov-20 11:38 AM do you have a reset button on the screen ? 09-Nov-20 11:39 AM no 09-Nov-20 11:40 AM try to set up your ide for upload, disconnect the ftdi adapter, reconnect it and as soon as it is plugged in click upload 09-Nov-20 11:40 AM and do you have a picture of the full setup with ftdi adapter and screen ? 09-Nov-20 11:42 AM try to set up your ide for upload, disconnect the ftdi adapter, reconnect it and as soon as it is plugged in click upload did that, nothing burger 09-Nov-20 11:42 AM and do you have a picture of the full setup with ftdi adapter and screen ? no, but all it really is: FTDI - Nextion RX <-- TX TX --> RX GND <--> GND 09-Nov-20 11:42 AM 5V power source is coming from an Arduino powered from the same computer 09-Nov-20 11:52 AM hmm weird, no idea why this is not working, I would still try a different ftdi adapter or a computer running windows without a vm 09-Nov-20 11:52 AM I have seen a lot of people having success with unofficial ftdi clone weirdly enough 09-Nov-20 11:54 AM already tried another USB - TTL adapter 09-Nov-20 11:54 AM already used Arduino as serial passthrough 09-Nov-20 11:54 AM nope 09-Nov-20 11:54 AM doesn't work 09-Nov-20 11:55 AM solders looking good ? have you checked continuity on the screen from tx and rx? 09-Nov-20 11:57 AM yes and yes 09-Nov-20 12:01 PM Ok I'm out of ideas 09-Nov-20 12:08 PM which is why I say it's stupid 09-Nov-20 12:08 PM I've checked everything already 09-Nov-20 12:08 PM I'd probably just SD card my way 09-Nov-20 12:31 PM Stupid indeed, SD card seem to be the way ! 09-Nov-20 01:43 PM That is one pretty piece of hardware. 09-Nov-20 01:43 PM I’d love to see @GigaSquirrel’s Red Pitaya based MCA with a portable screen. 09-Nov-20 01:44 PM I'll probably play around with it and the rpi 09-Nov-20 01:44 PM but in general I like a proper computer / laptop ^^ 09-Nov-20 01:46 PM Ehhh.... I am looking for something easily field portable. If I need to bring a laptop, that’s crossed the line into “field uncomfortable”. 09-Nov-20 01:46 PM Looking at it another way... Why do I need yet another MCA when I already have my NIM bin? 09-Nov-20 01:46 PM Now if you could combine a HVPS, MCA, and touch screen UI in a small battery powered box, preferably with nice software (I’m wondering if that free spectrum analysis software I’m forgetting the name of will run on rpi) then that’s a winner. 09-Nov-20 01:49 PM interspec runs on the pi, but hadrly 09-Nov-20 01:50 PM In other news, I may be migrating from Fusion 360 to SOLIDWORKS after Autodesk completely screwed over the maker/hobbyists that were with them from the beginning. 09-Nov-20 01:51 PM I need another mca apart from my nimbin, because I want to do spectroscopy in other places than my basement 09-Nov-20 01:52 PM Our makerspace has someone with Connections(TM) and we’ve been able to get licenses to edu version of SOLIDWORKS and a browser/cloud based version that was recently launched. 09-Nov-20 01:52 PM I don’t think my ancient laptop has the horsepower for SOLIDWORKS but the web version sounds interesting. 09-Nov-20 01:56 PM Ehhh.... I am looking for something easily field portable. If I need to bring a laptop, that’s crossed the line into “field uncomfortable”. @rdpierce how about a tablet? The pitaya interface runs on android, and so does interspec 09-Nov-20 01:57 PM That sounds good. 09-Nov-20 01:57 PM What about iPad? 09-Nov-20 01:58 PM don't have one 09-Nov-20 02:04 PM Hmmm.... android tablets are cheaper than iPads. Might be worth getting if you have a good portable system. 09-Nov-20 02:04 PM Basically, I’m looking for something I’d be willing to take on my next Chernobyl trip. My laptop is not going with me to Ukraine. No way. Not to mention, carrying it in a backpack. 09-Nov-20 02:05 PM why no laptop in the ukraine? 09-Nov-20 02:05 PM But a tablet plus a small box plus scint is doable. 09-Nov-20 02:05 PM Theft. I have to assume anything I have can and will be stolen. I don’t want to lose my hard drive. An iPad can be remotely wiped. 09-Nov-20 02:07 PM well 09-Nov-20 02:07 PM And weight. 09-Nov-20 02:08 PM the spectrometer as it stands is like 600 bucks, plus about the same for my LaBr, but that can ofc be replaced by cheaper NaI 09-Nov-20 02:08 PM Issue is data privacy and ease of recovery, not money. 09-Nov-20 02:08 PM My iPad cost more than my laptop. 09-Nov-20 02:08 PM I can much more easily replace my iPad than my laptop. 09-Nov-20 02:18 PM hmm I see 09-Nov-20 02:18 PM in that case I'd go with a cheap android or windows tablet 09-Nov-20 02:24 PM I'm leaning more towards this Cat S62 phone, nearly ready to blick buy.. as I am doing more machining and housework durability is a slight concern.. and the FLIR thermal imaging would be nice.. kinda sad it doesnt have the air quality sensor in the S61, but I think I need the fingerprint scanner [in the 62] at this point 09-Nov-20 02:24 PM current phone is at EOL 09-Nov-20 02:27 PM woah the s62 is already out? 09-Nov-20 02:27 PM a few months ago, UK version, but on amazon 09-Nov-20 02:27 PM I still have my S30, although the S31 is my daily runner 09-Nov-20 02:28 PM oh, you aree a cat phone owner, I should talk to you! 09-Nov-20 02:28 PM 5/5 stars? 09-Nov-20 02:28 PM I got my S31 for 200 bucks on a sale, considering this it's a solid 4/5 09-Nov-20 02:29 PM the S60 is on sale on amazon right now for $340 USD 09-Nov-20 02:29 PM that's lower on my list 09-Nov-20 02:29 PM just because, well, version one of the camera interface, and, older 09-Nov-20 02:29 PM space, android 6, etc etc 09-Nov-20 02:29 PM I dont power use my phone at all 09-Nov-20 02:29 PM I would not go with the '0 series tbh, they're slow and have terrible cameras 09-Nov-20 02:30 PM I check stocks, a little banking, a little web browsing, hardly any discord on it t hough, etc 09-Nov-20 02:30 PM I'm not a power user at all, just chats and a youtube video here and there 09-Nov-20 02:30 PM ah, I wasnt fully aware of their numbering scheme jsut yet, but that makees more sense 09-Nov-20 02:30 PM I want somethign that wont break, which was an issue of this last Sony phone 09-Nov-20 02:30 PM but, also, that FLIR on hand would be great 09-Nov-20 02:30 PM I am not eexcited about $800 USD for the s62 though.. that's thee price of any other flagship (or neearly) 09-Nov-20 02:31 PM the '0 series is their oldest, before '1 and now '2 The S3' is the bottom model, S4' and 5' are better, S6' is the flagship with thermal 09-Nov-20 02:31 PM yeah, I knew the 6x's had theeermals 09-Nov-20 02:31 PM haha, this 'e' key must be fixed.. I gotta complete this vintage terminal keyboard revaersal! 09-Nov-20 02:31 PM (I cracked the physical key tumbler lock circuit + code routine.. finally figured it out t here) 09-Nov-20 02:33 PM do you likee the physical buttons? 09-Nov-20 02:33 PM vs virtual only 09-Nov-20 02:33 PM very much 09-Nov-20 02:33 PM I remember when android made that new feature, and was interesting to see them reappear on these phones 09-Nov-20 02:33 PM the s62 is all virtual 09-Nov-20 02:33 PM it may come down to that fingerprint scanner on the 62, like I said 09-Nov-20 02:33 PM I use it for stocks and banking, zero passwords entered 09-Nov-20 02:33 PM and of course normal unlock 09-Nov-20 02:33 PM wouldnt like to go back to anything else 09-Nov-20 02:33 PM so.. yeah, physical buttons + air quality + older android... or virtual + fingerprint + latest android 09-Nov-20 02:33 PM shrugs 09-Nov-20 02:33 PM but I am likely leaning towards the 62 09-Nov-20 02:33 PM should last me a good 4 years, till it's time to get another 09-Nov-20 02:33 PM there is a review video of the s62 wher ethe dude puts it in awashing machine with clothes, at 40 C water.. a full run of an hour or so.. and it worked perfectly when done, including the speaker 09-Nov-20 02:33 PM slight delamination, but just of the screen protector? 09-Nov-20 02:40 PM can confirm the same for the S30, my S31 hat some issues with water that were fixed completley by opening it and smearing a lot of silicone grease on the gasket 09-Nov-20 02:41 PM I would have loved the air quality sensor, since I deal with solvents and whatnot.. but I also built a fumeehood specifically for that reason and thus wouldn't be stupid about fuemes forming 09-Nov-20 02:41 PM man the things my S30 has been through... Did you know that you can flip a phone over water, just like stones? 09-Nov-20 02:41 PM hahahaha 09-Nov-20 02:41 PM finding it again is the hard part 09-Nov-20 02:42 PM not that hard if there's enough alcohol involved 09-Nov-20 02:42 PM The term we use for that over here is 'skipping stones' not flipping 09-Nov-20 02:42 PM I almost like the idea of flipping, though 09-Nov-20 02:43 PM ah, ok 09-Nov-20 02:43 PM so.. if you had to chose the S61 or the S62, which one and why? 09-Nov-20 02:44 PM S61, because I don't care about a fingerprint sensor, enjoy physical buttons and think more sensors are more better 09-Nov-20 02:45 PM heeh, it even has a laser! 09-Nov-20 02:45 PM see! 09-Nov-20 02:45 PM what else can you wish for 09-Nov-20 02:45 PM more space and latest OS? 09-Nov-20 02:46 PM can always install a bigger SD card, and I don't care about new OS features, plus my S31 is still getting security updates 09-Nov-20 02:46 PM so, one referncee of the physical buttons usefuness I heard/read was if wearing gloves, what other use beyond always available is them? 09-Nov-20 02:46 PM just the feel 09-Nov-20 02:46 PM yeah, I was a little curious about how long updates still come from them 09-Nov-20 02:47 PM gotta say the touchscreen works pretty well with gloves 09-Nov-20 02:47 PM I'm just so used to that finger print scanner, beeen using th is one for like 4+years 09-Nov-20 02:47 PM that is really the only hardware selling point.. double the space is -meh- to me 09-Nov-20 02:47 PM I certainly dont game on my phone 09-Nov-20 02:47 PM heh, I dont even game on my computer 09-Nov-20 02:47 PM and I built it for game dev 09-Nov-20 02:48 PM don't game either 09-Nov-20 02:48 PM main use for my phone is taking pictures, chatting and music 09-Nov-20 02:49 PM so now the one main aesthetic differeence.. that little bump "for the thermal camera" in the 61 vs a standard looking phone in the 62 09-Nov-20 02:49 PM has a decent DAC inside if that matters to you 09-Nov-20 02:49 PM yeah, I take a bit of photos 09-Nov-20 02:49 PM oh, the 62 has no head phone jack 09-Nov-20 02:49 PM better waterproofness? though no issue on other models? 09-Nov-20 02:50 PM ohh no headphone jack is a killer for me 09-Nov-20 02:50 PM I dont do heaphones too much.. more so at the grocery store.. since spinning lathes are not good with wires hanging off your head 09-Nov-20 02:50 PM but, I likee to consider myself an audiophile.. or atleast really into certian genres of music.. I dont like all music 09-Nov-20 02:51 PM I prefer speakers, but I do a lot of commuting (my last job was a 1.5 hrs train ride) and I like to listen to music or audio books then 09-Nov-20 02:52 PM I have a lil blueeetooth headphonee adapter thing (Sony) somewheeree around here anyways 09-Nov-20 02:52 PM so, not like I wont be able to plug headphones into something and use it 09-Nov-20 02:52 PM hrm... but yeah... what other main physical hardwaree differeences are there worth mentioning 09-Nov-20 02:52 PM it may come down to sensors alone 09-Nov-20 02:53 PM not sure 09-Nov-20 02:53 PM I have no idea about the processors etc 09-Nov-20 02:53 PM and that bump out 09-Nov-20 02:53 PM been told mine's got an old one 09-Nov-20 02:53 PM XD 09-Nov-20 02:53 PM yeah, I dont care about snapdragon fourthasand and two, or whatever 09-Nov-20 02:53 PM or 6 jigabytees of ram, meh 09-Nov-20 02:53 PM the back of the s62 is likee half grippy, raised up, which mens thee thing rocks around i fit is sitting on a desk flat and you are trying to use it 09-Nov-20 02:53 PM (most of this is regurgetated from the few reviews already out on it) 09-Nov-20 02:56 PM hmm 09-Nov-20 02:56 PM also no flap over the usb? 09-Nov-20 02:56 PM not this time around? 09-Nov-20 02:56 PM which means better charging 09-Nov-20 02:57 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/Caterpillar-Cat-S62-Pro-658x370-304bc6adbc-7C6CF.png 09-Nov-20 02:57 PM obviously still proven for waterproofness 09-Nov-20 02:57 PM not sure about longevity 09-Nov-20 02:57 PM well, it can obv handle 60minutes in the clothes washer 09-Nov-20 02:57 PM once 09-Nov-20 02:57 PM maybe more 09-Nov-20 02:58 PM not just water, also particles 09-Nov-20 02:58 PM chips from mills 09-Nov-20 02:59 PM oh, those just land in the carpet in front of the lathe/mill and stay there 09-Nov-20 02:59 PM ... >_> 09-Nov-20 03:00 PM these new oens are twice the weight of my current compact sony phone 09-Nov-20 03:00 PM I have highly enjoyed using one hand to do lots of thigns, I dont want/need to use 2 09-Nov-20 03:00 PM seems mostly like compact phones are a t hing of the past? yet iphones and pixels are coming out with small versions 09-Nov-20 03:01 PM single handed is not an issue with my phone, but I do have big hands 09-Nov-20 03:01 PM I dont think my hands are small by any means, but yeah 09-Nov-20 03:01 PM plus, again, not a power user 09-Nov-20 03:01 PM dude.. that fingerprint scanner I think is the tipping point 09-Nov-20 03:01 PM oof 09-Nov-20 03:01 PM comparing them the S62 honestly feels like a downgrade 09-Nov-20 03:02 PM ikr? 09-Nov-20 03:02 PM if they remeoved thee laser but kept the AQI I would like it more 09-Nov-20 03:03 PM it'll be interesting how long the fingerprint sensor survives on a real construction site 09-Nov-20 03:04 PM yeha, mine stays in my pocket.. I have a specific pockeete in my house working bibs just for my phone 09-Nov-20 03:04 PM only times I bring it out is phtos and calculator 09-Nov-20 03:04 PM plus what's the sense in reading fingerprints with a phone that's designed for environments where you're better off wearing gloves 09-Nov-20 03:04 PM during house work 09-Nov-20 03:04 PM maybe phone calls! 09-Nov-20 03:04 PM strictly not for calls 09-Nov-20 03:04 PM well, for everyday use as well? 09-Nov-20 03:05 PM for everyday use I tend to have a computer / laptop near me which I much prefer over using a phone 09-Nov-20 03:05 PM right, I am on the computer a bunch 09-Nov-20 03:05 PM no laptop anymore (was previous work's property) 09-Nov-20 03:07 PM I love my laptop 09-Nov-20 03:08 PM when I have nitril gloves on (machining oils/lubricants) I've been needing to not use the fingerprint scanner... and how many time sdo I really ned to log into stocks/bank account (which are the only other uses of fingerprint login right now) 09-Nov-20 03:08 PM (maybe convincing myself it's not needed) 09-Nov-20 03:09 PM (because it isn't) 09-Nov-20 03:10 PM it's too new [and niche] for lots of reviews.. so trying to compare it more is hard 09-Nov-20 03:10 PM but, I am happy that you are happy with cat phones, otherwise I was half considering other maker's flagships for same price 09-Nov-20 03:10 PM there are always stories of people having bad repair experiencee with everyone, onee dude had like 3x replacement of his 61, but cat finally made it right at the end 09-Nov-20 03:10 PM (on YT) 09-Nov-20 03:12 PM oh I've had bad experience with repair of my phone as well 09-Nov-20 03:12 PM had water damage 09-Nov-20 03:12 PM the cat service was fast and great, but the repair company they sent it to messed up big time 09-Nov-20 03:12 PM forgot to put a case screw back in, claimed they tested it after repair etc 09-Nov-20 03:13 PM yeah, that was the issue with the US based guy as well 09-Nov-20 03:13 PM bad repair subcontractor 09-Nov-20 03:13 PM being giveena differeent 'repaired' phone that was alreeady full of dings and sracthes 09-Nov-20 03:14 PM I got a new one after the second attempt 09-Nov-20 03:14 PM that actually looked new 09-Nov-20 03:15 PM they sent him a new one after linking them to his unboxing video of the 'repaired' one 09-Nov-20 03:15 PM and fast, before it took he said like 2-3 weeks 09-Nov-20 03:15 PM but, every service partner is going to have thing slikee that 09-Nov-20 03:15 PM diff in thermal sensors, I thnk the S61 has the Lepton 3, and the 62 is 3.5 09-Nov-20 03:16 PM yeah, and to be fair I did end up with a working phone after all 09-Nov-20 03:18 PM I also thnk the newer model will have lots of fixes, both hardware and software size, of what was learned in earlier models 09-Nov-20 03:19 PM still trying to convince yourself you actually need that fingerprint sensor, right? 09-Nov-20 03:19 PM hehahah... yeaaahhh 09-Nov-20 03:20 PM what the hell 09-Nov-20 03:20 PM and if I am going to be 'stuck' with it for years 09-Nov-20 03:20 PM in out local store the s61 is 760 and the s62 630 09-Nov-20 03:20 PM I try to make arguments on both sides 09-Nov-20 03:20 PM I should just flip a coin 09-Nov-20 03:20 PM wait what? hah 09-Nov-20 03:20 PM amazon is $600 USD foor the 61, delivery overnight, or a week or so for the $800 S62 09-Nov-20 03:21 PM rofl 09-Nov-20 03:21 PM different warehouses 09-Nov-20 03:21 PM and shipping regulation of batteries 09-Nov-20 03:21 PM k, just flipped a coin to Heads.. but I didnt tell myself which one was heads/tails 09-Nov-20 03:21 PM I should think these things over, lol 09-Nov-20 03:24 PM so, both the Lepton 3 and 3.5 FLIR sensor is 160x120 09-Nov-20 03:24 PM so thermal imaging is more or less the same 09-Nov-20 03:26 PM yep 09-Nov-20 03:26 PM good luck on deciding, I'll go to bed now 09-Nov-20 03:27 PM but now provides calibrated radiometric output across the entire 19,200 pixel array 09-Nov-20 03:27 PM yeah dude, thanks for leetting me know it's a good brand to go with though 09-Nov-20 03:29 PM sure, always happy to help ^^ 09-Nov-20 03:30 PM wow, shipping is super weird, refreshed it once and said if I order within an hour it'll be here wednesday, then reefreshed again and now says monday 09-Nov-20 03:30 PM must've missed thee trailer being loaded up, heh 09-Nov-20 03:30 PM now says sunday, whats up amazon 09-Nov-20 03:30 PM lol 09-Nov-20 05:33 PM thinking more on that usb flap on the S61... that would be highly annoying needing to open that up every single (or every other) night to charge it up... 10-Nov-20 12:35 AM I can only say that it doesn't bother me at all, it's one quick movement 10-Nov-20 12:35 AM but if you have Finger nails like this old tony it will bother you a lot :D 10-Nov-20 08:48 AM Well my brain has finally got to the point where it’s stopped fighting complex exponentials, and negative frequencies and Fourier transforms are starting to make sense. 10-Nov-20 08:48 AM I think they intentionally try to break your brain in the first few weeks. 10-Nov-20 08:51 AM Presumably you’ve been shown the link between complex exponential and sine/cosine/sinh/cosh... 10-Nov-20 08:51 AM Once that’s there it’s a lot more palatable 10-Nov-20 09:11 AM Yes, it’s more getting my brain to wrap around it. 10-Nov-20 09:11 AM I mean, I know Euler’s equation. 10-Nov-20 09:11 AM It’s just that people don’t normally think about imaginary numbers, frequencies that are negative, or complex exponentials. 10-Nov-20 09:17 AM euler's equation is the "elegant math makes sense" way 10-Nov-20 09:17 AM this is the "oh, now I can engineer without thinking about stuff" way 10-Nov-20 09:17 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/hqdefault-BD3C5.png 10-Nov-20 09:22 AM I remember that moment in Mathematical Methods of Physics when this was taught. You could feel an entire class deleting Euler's equation from their minds to make use of this. 10-Nov-20 09:30 AM This is what we do. Expanding things into e’s and then regrouping them later into individual sines and cosines. 10-Nov-20 09:32 AM Yeah 10-Nov-20 09:32 AM And... I haven’t seen the end of partial fractions. RC filters that have frequency responses of 1/(a+jw) 10-Nov-20 09:32 AM That’s not how the math folks want you to do it though 10-Nov-20 09:32 AM They think these are ugly 10-Nov-20 09:32 AM Mary Boas textbook is beautiful 10-Nov-20 09:32 AM mathematicians vs electronics engineers 10-Nov-20 09:32 AM FIGHT! 10-Nov-20 09:33 AM https://en.m.wikipedia.org/wiki/Mathematical_Methods_in_the_Physical_Sciences 10-Nov-20 09:33 AM She published the third edition when she was 88 10-Nov-20 09:35 AM I do not have enough swearing to use to express my feelings about that book because of Dyno_bot. I lost count of the number of times I threw or kicked that book across the room in college. 10-Nov-20 09:37 AM Are you aware of how lucky we are math people got it together in the 1800s? 10-Nov-20 09:37 AM Linear algebra barely predates quantum mechanics 10-Nov-20 09:37 AM It wasn’t taught to physicists for decades 10-Nov-20 09:37 AM Calculus? Ancient 10-Nov-20 09:38 AM Math Mathods needs excellent professors who teach with clarity. I...I didn't have that. The fact that I passed both classes is still something I consider remarkable. 10-Nov-20 09:38 AM But linear algebra is young 10-Nov-20 09:38 AM And turns QM decapitations into mere cluster headaches 10-Nov-20 09:39 AM I recall. 10-Nov-20 09:39 AM (And ended up being super useful for computers, too) 10-Nov-20 09:39 AM Wait have you seen the next step 10-Nov-20 09:39 AM Of how we improve upon it 10-Nov-20 09:40 AM Tensor analysis? It's nice. 10-Nov-20 09:40 AM https://physics.aps.org/articles/v11/124 10-Nov-20 09:40 AM This is the best physics of the past decade imo. I love it 10-Nov-20 09:40 AM Note that it’s an experimental paper. Not just theory. 10-Nov-20 10:18 AM I think the bigger sigh of relief is that Born just happened to know this relatively new, esoteric field of math. And also I guess that Heisenberg was working with Born and willing to just do calculations blindly to see what was going on. 10-Nov-20 10:21 AM Beautiful 10-Nov-20 10:21 AM I have the new mcp but I don’t want to break it so I’m still using this for now :’) 10-Nov-20 10:21 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/image0-1BEEA.jpg 10-Nov-20 11:30 AM I was just thinking about the elegance of multiplication in time domain being convolution in the frequency domain, and convolution in the time domain being multiplication in the frequency domain. 10-Nov-20 11:30 AM And... here’s how an AM radio works. 10-Nov-20 11:48 AM and fourier optics and ultrashort laser analysis 10-Nov-20 12:08 PM https://twitter.com/thecoopertom/status/1325710953305026560?s=21 10-Nov-20 12:08 PM Furries. The presidential hose reel, fire extinguisher, and hazmat sign. This is priceless. 10-Nov-20 12:08 PM I’m wondering if they’ll model the neighboring pr0n shop and crematorium. 11-Nov-20 11:26 AM Watching police chases on the news is always really odd when they are in areas you have spent a lot of time 11-Nov-20 04:48 PM So what has ever one been up to here? 11-Nov-20 05:02 PM Making a lot of coffee and wrangling all the upgrades everyone's decided to do while campus is closed. 11-Nov-20 05:12 PM s u r p r i s e 11-Nov-20 08:16 PM Man leave it to TE to make me download a 300 page data sheet when I need the dimensions of one din rail terminal block. 11-Nov-20 08:23 PM Also for the record designing anything DIN rail related with very limited vertical clearance sucks. 11-Nov-20 08:25 PM So, Where've you been? 11-Nov-20 08:25 PM I was half considering trying t locate you on insta or twitter to give you some run down 11-Nov-20 08:25 PM since you mntioned being on twitter 11-Nov-20 08:26 PM Had to unplug from the internet for waves hands reasons 11-Nov-20 08:27 PM (also, my 'e' keey is foobard, so I decided to get a super old honeywell hall efect terminal keyboard and working on reverse engineering it to usee on modern pc) 11-Nov-20 08:27 PM yeah, I know people who unplug during every election 11-Nov-20 08:27 PM pfft 11-Nov-20 08:27 PM Yeah I knwo 11-Nov-20 08:27 PM face it. u will grow stronger 11-Nov-20 08:28 PM It was good to focus on IRL stuff more 11-Nov-20 08:28 PM tru 11-Nov-20 08:28 PM oh man, I havent had a FB account for like 3 years 11-Nov-20 08:28 PM my mouser cart lookin about ready to burst 11-Nov-20 08:28 PM and grantid I only had it for about 3yr prior, it was nice to get away and not keep up with the joneeses 11-Nov-20 08:28 PM Trying to run a business that involves field service during a pandemic is fun 11-Nov-20 08:28 PM oh boy 11-Nov-20 08:28 PM cheap flights? 11-Nov-20 08:29 PM that sounds challenging 11-Nov-20 08:29 PM No flights 11-Nov-20 08:29 PM unst 11-Nov-20 08:29 PM Haven't flown during this all 11-Nov-20 08:29 PM i may have to 11-Nov-20 08:29 PM in order to be able to graduate 11-Nov-20 08:29 PM I may neeed to head back to ohio to pickup machinery and store it in the pssible future watchmaking studio/garage thing 11-Nov-20 08:29 PM I have to regularly interact with older family so I have to be very carful 11-Nov-20 08:30 PM sure, I have nobody out here 11-Nov-20 08:30 PM gonna try to convince the chem department i dont need their lab class because ive been working in a lab the last 3 years 11-Nov-20 08:30 PM its the only reason i would have to go lol 11-Nov-20 08:30 PM I do miss travel a lot though 11-Nov-20 08:31 PM the friend that helped me get this jig brer (and now has a ~800lbs lathe bed looking thing in his truck for a non rainy day) I met back at OSU's OpenSource Club, but I havent hung out with him for over 2 years - and he lives like 8 blocks away! 11-Nov-20 08:31 PM I kinda miss flying here and there, I did not do it much though.. a few computer conferences - but not many 11-Nov-20 08:32 PM I did a bit of shop remodel as well 11-Nov-20 08:32 PM Well more like in the middle of it 11-Nov-20 08:32 PM The concrete floor I was on was producing so much dust it was becoming a big issue 11-Nov-20 08:32 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/Vmtf0bIHYPsFy6JyD0nWVyZwNvXuSWJLCq6nXlJbLh-16326.png 11-Nov-20 08:33 PM before i replace the remaining sheathing + windows I need to relocateee my mains in->circuit panel (to the garage) 11-Nov-20 08:34 PM So I'm putting down a heavy guage vinyl floor. 11-Nov-20 08:34 PM I kinda like the wood under the scope 11-Nov-20 08:34 PM I am scared about dust for some machines.. I got a heavy old Leitz toolmaker's microscope 11-Nov-20 08:34 PM and it's right next to the lathe 11-Nov-20 08:34 PM which, wrong side, I cant put stock through the spindle 11-Nov-20 08:35 PM But having 3 SEMs in my shop while trying to do this is just a big game of Tetris 11-Nov-20 08:35 PM lol, need to relocate 11-Nov-20 08:35 PM Yeah 11-Nov-20 08:35 PM I am working on it 11-Nov-20 08:35 PM hey, I learned you know how to play tetris very well! 11-Nov-20 08:36 PM Lol I have packed up to many trucks 11-Nov-20 08:36 PM my mother and I eventually figured out perefect arrangement for her art shows 11-Nov-20 08:38 PM I used to do a lot of AV stuff so I definitely feel that. 11-Nov-20 08:38 PM Everything had to either fit in the tiny little closets or the back of my pickup. 11-Nov-20 08:39 PM yeah, my dad still works doing big videoboard stuff for the crew soccer stadium - they are building a new stadium that he is pretty involveed with 11-Nov-20 08:39 PM I learned from a musician a way to eensure things go back in is to take pictures and put them in the lids of the boxes, so you always arrangee it thee same way every time 11-Nov-20 08:40 PM I think my best work was figuring out how to fit all of a TEM that I parted out in the field into 1 pallet. 11-Nov-20 08:40 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/PMDIhJigRcmbCoX5As1I8ajffnUNXOtLsdhzGFVAqk-B9CE6.png 11-Nov-20 08:40 PM I shoved the power supply rack full of more parts to get everything on the 1 pallet. 11-Nov-20 08:40 PM I should have taken a pic of the dividing head cratee... best shipping job I ever recieved 11-Nov-20 08:40 PM just things properly blocked in, secured, etc 11-Nov-20 08:41 PM For a dividing head it better be. 11-Nov-20 08:41 PM wow black tile 11-Nov-20 08:41 PM well, a 250lbs dividing head on a big lathe beed like thing 11-Nov-20 08:41 PM fancy lab 11-Nov-20 08:41 PM Yeah this place was crazy 11-Nov-20 08:41 PM The freezers with the cadavers were across the hall 11-Nov-20 08:41 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/s-l1600-2B36D.jpg 11-Nov-20 08:42 PM oh nice what lab was this 11-Nov-20 08:42 PM that black tile looks ace 11-Nov-20 08:42 PM i worked part time as a student in a neuro lab 11-Nov-20 08:42 PM until rona 11-Nov-20 08:42 PM we dont have SEMs but lots of mass specs 11-Nov-20 08:44 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/WWeaLKvD6ZUWkZpA3oQPivcHpeumL_tp0FCd5DRQrW-E6988.png 11-Nov-20 08:44 PM The entire building was like this 11-Nov-20 08:44 PM kinda menacing now that u said there were cadavers 11-Nov-20 08:44 PM but still very cool 11-Nov-20 08:44 PM Yeah 11-Nov-20 08:44 PM I rode in the elevator with one once 11-Nov-20 08:45 PM ... did you poke it? 11-Nov-20 08:45 PM No 11-Nov-20 08:45 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/pcYxojTB1t7Hg0HXV89PNWw0tw8HODw-RcHYt-aVbC-CDEBE.png 11-Nov-20 08:45 PM The other building I was in on site was an abandoned hospital 11-Nov-20 08:45 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/dnlDi6_AQLkLWbI_FKGFd65kF3e46X4msylC8Vtx-R-A5BE4.png 11-Nov-20 08:46 PM I've been half looking on govdeals for random stuff, havent come across any decent sem/tem in the times I've looked, recently 11-Nov-20 08:46 PM how do you abondon a hospital? 11-Nov-20 08:46 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/i41GFB30xOw-dMmMkcSp9_oH2Sjb-4ZBcpF5K6Dky_-50633.png 11-Nov-20 08:46 PM So this is in New Orleans 11-Nov-20 08:46 PM And let me just say the hospital politics there are insanity. 11-Nov-20 08:47 PM ohh, noted 11-Nov-20 08:47 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/i41GFB30xOw-dMmMkcSp9_oH2Sjb-4ZBcpF5K6Dky_-C4318.png 11-Nov-20 08:47 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/wtgf2QnQdllN5VFkI01qnleurglV06n3K8HvgLjJ-u-B5D2A.png 11-Nov-20 08:47 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/KYSMSCOiPMvYT9ETf4StTtbymMgqPPBRxuP8Qx3beM-A7B7F.png 11-Nov-20 08:47 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/ImgW6Lsy-lgqvoCCK_WhtTZn_rwPhXgcJ3u8tmT52b-69DCA.png 11-Nov-20 08:48 PM when you said NOLA I almost figured water damage or something 11-Nov-20 08:48 PM easier/cheaper to build anew - was the thought 11-Nov-20 08:49 PM It was kind funny how it happened that they took me around there 11-Nov-20 08:49 PM They were like oh you know how to remove big surplus equipment can you come look at something for us? 11-Nov-20 08:49 PM The something was all of the x-ray machines and the MRI machine 11-Nov-20 08:49 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/DD-KiDxvhEChL9NQxIel44dvgLnOnxasy7fd3hPw3T-F92A8.png 11-Nov-20 08:49 PM Overall a strange trip 11-Nov-20 08:49 PM The TEM I parted out was supposed to be used in an ebola movie 11-Nov-20 08:53 PM I'm kinda just now getting into machining stuff.. since school was basically full time 11-Nov-20 08:53 PM more of a machine collector at this point 11-Nov-20 08:53 PM so have you been driving everywhere needbe? 11-Nov-20 08:53 PM or has there been any kind of lack of work 11-Nov-20 08:53 PM oi, so I've been working with a quite a few logic chips on this vintage terminal kyboard.. FlipFlops, ANDs, NORs, XOR, etc etc... do you come across boards filled with that kind of stuff in older SEMs? 11-Nov-20 09:02 PM Oh yeah I deal with TTL logic a lot 11-Nov-20 09:02 PM I have been driving a lot 11-Nov-20 09:02 PM Also working on more projects for clients in my shop 11-Nov-20 09:02 PM A lot of the electron microscope industry in the US is in Washington and Oregon 11-Nov-20 09:03 PM ah, perfect 11-Nov-20 09:04 PM When it first hit things were pretty quite 11-Nov-20 09:04 PM Then the backlog caught up with everyone 11-Nov-20 09:05 PM yeeah, the freight company said it's been nuts 11-Nov-20 09:05 PM (the forklift guy) 11-Nov-20 09:05 PM But on the logic question yeah thats all an older sem is 11-Nov-20 09:05 PM wow.. interesting 11-Nov-20 09:05 PM The really old ones were completely analog 11-Nov-20 09:05 PM The most TTL in scopes was in the 80s and early 90s 11-Nov-20 09:05 PM After that they started going more PC driven 11-Nov-20 09:05 PM But all of the 8086 scopes are still in use today 11-Nov-20 09:06 PM I scoped some thigns last night, kind of discovered a btit moree.. but still ntoo convinced on why the intel 8048 (softwaree 100% reversed) only pulses this shift register (eenable pin) once and somehow I am expected to time and get 8 bits out of it? 11-Nov-20 09:06 PM In some cases they are selling for insane amounts 11-Nov-20 09:07 PM or maybe I get one bit per, that seems lsightly more reasonable 11-Nov-20 09:07 PM but then slow for the whole loop 11-Nov-20 09:07 PM anyways - I only have half the equation 11-Nov-20 09:07 PM ie, the keyboard, not +terminal 11-Nov-20 09:08 PM So what is the problem? 11-Nov-20 09:08 PM You are not seeing data come out the microcontroller? 11-Nov-20 09:09 PM I am.. it puts data from the BUS onto the shift register.. but it only flashes the enable pin during an interrupt, and one pulse 11-Nov-20 09:09 PM and I have to ShiftRight the entire contents 11-Nov-20 09:09 PM Iunno, there is some timing stuff I still gotta figure out 11-Nov-20 09:09 PM also, that enable pulse I only figured out in the past 2 days or so 11-Nov-20 09:10 PM Do you have schematics? 11-Nov-20 09:10 PM heh, nope.. I had to sketch it all out myself 11-Nov-20 09:10 PM continuity test EVERY pin to EVERY OTHER pin 11-Nov-20 09:10 PM Without seeing how the address bus is done its hard to say 11-Nov-20 09:11 PM yeah, I think I got the hang of what they are doing, I am just not convinced on going about this shifting to get the data out, regarding timing the pulse 11-Nov-20 09:11 PM the code reads very well.. like a human programed it 11-Nov-20 09:11 PM not some compiler 11-Nov-20 09:12 PM lol 11-Nov-20 09:12 PM anywho, it's my side project while it rains and machinery gets shipped 11-Nov-20 09:12 PM I'm actually nearing having all the machines I may need 11-Nov-20 09:12 PM swiss-type lathe is about all that remains 11-Nov-20 09:12 PM oh, and guilloche stuff, but I know a guy 11-Nov-20 09:13 PM Very nice 11-Nov-20 09:13 PM I picked up a pocket nc recently actually 11-Nov-20 09:13 PM That little 5 axis machine 11-Nov-20 09:14 PM this lil guy is ending soon.. https://www.govdeals.com/index.cfm?fa=Main.Item&itemid=527&acctid=10639 11-Nov-20 09:14 PM Well I haven't actually picked it up yet from the guy, but you get the idea. 11-Nov-20 09:14 PM That should be next week 11-Nov-20 09:14 PM haha, I know the deal! the dividing head now in my buddy's truck was bought at the start of covid 11-Nov-20 09:14 PM he was going to ship it via fastenal, and they said: pandemic? 11-Nov-20 09:15 PM Lol 11-Nov-20 09:15 PM held onto it for way too long 11-Nov-20 09:15 PM I can send you my freight broker info if you want 11-Nov-20 09:15 PM I just used YRC, and I liked them well enough 11-Nov-20 09:15 PM Nice yeah I have used them before 11-Nov-20 09:16 PM two items, arrived in perefect condition - but both of these were 'over' packed/crated, etc 11-Nov-20 09:16 PM I have different ones depending on where on the spectrum of cheap vs high end I want to fall 11-Nov-20 09:17 PM I paid $200 to get the lil jig boreer from NC 11-Nov-20 09:17 PM but crated it wasnt moree than 500lbs 11-Nov-20 09:17 PM also, that was a pickup at terminal 11-Nov-20 09:17 PM Nice that's pretty good pricing 11-Nov-20 09:17 PM What pickup option was that? 11-Nov-20 09:17 PM even their rush pricing wasnt more than $50 at that point, but just ahead by a day or so 11-Nov-20 09:18 PM I got a pallet overnight last week from texas for 400 11-Nov-20 09:18 PM I think he put it in the trailer on the 29th? 11-Nov-20 09:18 PM so, basically a week plus weekends 11-Nov-20 09:18 PM It was only like 200 lbs but the speed was worth it 11-Nov-20 09:18 PM yeeah, I hear ya 11-Nov-20 09:19 PM I mean was it lift gate on pick up or? 11-Nov-20 09:19 PM my friend in NC had a forklift 11-Nov-20 09:19 PM shipped it from his work 11-Nov-20 09:19 PM yeah, so the item was pickup only, luckily I had a cycling friend 30mins away from him 11-Nov-20 09:19 PM so my frieend crated it up himself 11-Nov-20 09:19 PM the price for him doing it? a custom hand made watch 11-Nov-20 09:22 PM Lol seems like he got a good deal 11-Nov-20 09:23 PM yeah, well, it's kinda a rare machine, so I'm glad to have one 11-Nov-20 09:23 PM I have a much larger swiss made jig borer waiting for me around Cleveland 11-Nov-20 09:23 PM still havent seen it in person 11-Nov-20 09:23 PM (my buddy has) 11-Nov-20 09:24 PM Good enough right? 11-Nov-20 09:24 PM yeah.. this one will be used for prototyping, the other for production 11-Nov-20 09:24 PM Yeah the biggest slow down for me in getting more scopes right now is not being able to fly out and pick them up 11-Nov-20 09:24 PM So are you still cnc free? 11-Nov-20 09:26 PM Yeah.. as of right now.. the toolmaker's microscope is the only thing with a dro/glass scales (missing the actual DRO right now, need to interface/build my own, more on that later) 11-Nov-20 09:26 PM the swiss-type lathe will be CNC though 11-Nov-20 09:26 PM the only other way would be cam driven.... but why? 11-Nov-20 09:27 PM The swiss is not going in the house is it? 11-Nov-20 09:27 PM I love the idea and whatnot, but I am not romanticized so much of that aspect anymore 11-Nov-20 09:27 PM hahaha, I would not get the barfeeder in 11-Nov-20 09:27 PM so, I plan on making it, actually.. and it's moree of an infeed-capable boring head, with coil wire work feed through a bushing in the table 11-Nov-20 09:27 PM and thus, the enevelop for stock doesnt need 12+ ft 11-Nov-20 09:27 PM if it's a coil of wire 11-Nov-20 09:28 PM I mean it could be a baby swiss 11-Nov-20 09:28 PM oh, I can get 300 screws out of a 2m bar? okay 11-Nov-20 09:29 PM Lol picky picky 11-Nov-20 09:29 PM Any machines you are looking at? 11-Nov-20 09:29 PM well, the top on the list would be a new Tornos Swiss Nano 11-Nov-20 09:30 PM That would be pretty cool 11-Nov-20 09:30 PM but, I havent dont much research into what is available, mostly because second hand I see Ctiizens and Stars come up often enough that ti will be a : sure, this'll work 11-Nov-20 09:30 PM my countdown clock is currently 249 days until the NAWCC National Convention 11-Nov-20 09:30 PM wheree I want to show off a chess game clock that I've been sketching 11-Nov-20 09:30 PM a sinmgle movement, not two separat emovemeents that get hacked like the old mechanical versions 11-Nov-20 09:30 PM school was deceent enough - once I learned the phrase: what do you want to get out of the program (and what do the teachers know/can teach) 11-Nov-20 09:30 PM but generally dissapointed about zero engineering 11-Nov-20 09:35 PM Well just have to go to engineering school now lol 11-Nov-20 09:35 PM yuuup.. that's been a thought 11-Nov-20 09:35 PM would love to go through the MIT program from the profeessor's book I've been following on the topics (Precision Engineering) 11-Nov-20 09:37 PM That would be pretty cool 11-Nov-20 09:38 PM ... but that would mean moving to boston.. 11-Nov-20 09:38 PM not against that, but gotta get to ohio, first 11-Nov-20 09:38 PM So less cool. 11-Nov-20 09:39 PM it's not like I am trying to find a job.. I am trying to gain knowledge to apply to objects I want to sell.. so an entire program is a bit much 11-Nov-20 09:39 PM Yeah makes a lot of sense 11-Nov-20 09:39 PM Maybe get setup for a while first then really figure out what you want in terms of more classes/programs 11-Nov-20 09:40 PM right: what do I want to get out of this program 11-Nov-20 09:46 PM Honestly seems like a good question to be asking in general 11-Nov-20 09:46 PM keeps expectations reasonable 11-Nov-20 09:46 PM but also gives a vision/aim 11-Nov-20 11:51 PM It's getting full on the table 11-Nov-20 11:51 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/JSM6460-01BDD.jpg 11-Nov-20 11:52 PM Ok ill bite 11-Nov-20 11:52 PM what is that on the door? 11-Nov-20 11:52 PM specimen exchange 11-Nov-20 11:52 PM Load lock? 11-Nov-20 11:52 PM yes 11-Nov-20 11:52 PM i'm currently waiting for several parts 11-Nov-20 11:52 PM such as the FEI FIB 11-Nov-20 11:52 PM and a CF-balg for my CL-Detector 11-Nov-20 11:53 PM So air free transfer between the fib and sem? 11-Nov-20 11:53 PM i'll try to fit the FIB column on the sem 11-Nov-20 11:54 PM Looks like you have a pretty well equipped scope there. 11-Nov-20 11:54 PM so far i'm reaching e-8 mbar at the specimenchamber 11-Nov-20 11:54 PM Im guessing 6460? 11-Nov-20 11:54 PM yes 11-Nov-20 11:56 PM What fib do you have? 11-Nov-20 11:56 PM most of the parts are machined by myself, the only thing i really need to build is a spotwelder for cathodes tho 11-Nov-20 11:56 PM If you need any more bases let me know 11-Nov-20 11:56 PM I have a lot of k type filaments 11-Nov-20 11:56 PM the fib is just a standalone column from a really old sims 11-Nov-20 11:56 PM Ah like a 611? 11-Nov-20 11:57 PM i'll post pictures later 11-Nov-20 11:57 PM Very cool 11-Nov-20 11:57 PM Are you good on schematics for that scope? 12-Nov-20 12:01 AM Well i have the "book" from jeol 12-Nov-20 12:01 AM https://www.torontosurplus.com/media/catalog/product/cache/1/image/9df78eab33525d08d6e5fb8d27136e95/f/e/fei-83-2l1_1_1.jpg 12-Nov-20 12:01 AM Yup that is a 611 right there 12-Nov-20 12:01 AM let me know if you need docs or anything on it 12-Nov-20 12:01 AM Or parts 12-Nov-20 12:02 AM The fib looks like that one, just an older model i think, i can't find the pictures of the actual column at this moment 12-Nov-20 12:02 AM That is almost the oldest column that FEI made right there 12-Nov-20 12:02 AM The only problem with my sem is that the stage has problems 12-Nov-20 12:04 AM Like what? 12-Nov-20 12:04 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20200502_211630-6261C.jpg 12-Nov-20 12:04 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20200502_211625-743ED.jpg 12-Nov-20 12:04 AM Like what? @AdamMcCombs In the software there is a specimenholder stuck, i can't change it and the stage can't rotate. If i reset the controller i can initalize it, every axis moves bit then it loads the sampleholder again and is stuck 12-Nov-20 12:04 AM Even a complete new installation of the software doesn't fix the issue i think the holder is saved on a EEPROM somewhere in the sem... 12-Nov-20 12:07 AM hmmm 12-Nov-20 12:07 AM Why do you think it is the holder setting? 12-Nov-20 12:07 AM This kinda sounds like a chip select issue 12-Nov-20 12:07 AM Like maybe one of the HC574s on the MS I/O card 12-Nov-20 12:19 AM Could also be an encoder issue 12-Nov-20 12:19 AM Now I'm not as familiar with the stage control on the 6460 sequence of operations as other systems but if memory servers stage int doesnt use the encoder in the same way, so if there was an encoder issue on R then that might lock up that axis after is initialized. 12-Nov-20 12:35 AM Well the thing is there is a stage941.exe wich the main program opens 12-Nov-20 12:35 AM In this "subprogram" you can select the holder, but the button "holder" is not selectable wich is unusual. If you open the 941stage.exe without the main program the holder option is selectable. 12-Nov-20 12:35 AM The stage initialisation is only possible if the stagecontrollerboard is reset manually. Then there is a timeframe of about 10seconds where you can select the initialisation, otherwise not. If it initialises it shows the correct values but after a few seconds it gets other values from somewhere and bricks the init. and rotation 12-Nov-20 12:35 AM So the stage and encoders work perfectly fine 12-Nov-20 12:35 AM I think the 941.exe saves the holder somewhere on the controllerboards. And i think this flashmemory(?) could be faulty or the controller for that. 12-Nov-20 12:47 AM The stage boards dont have any flash memory on them like that to my knowledge 12-Nov-20 12:47 AM Now that being said a few of the board I dont have docs for 12-Nov-20 12:47 AM Namely the ones that would have program roms on them 12-Nov-20 12:47 AM Any change you have a logic analyzer? 12-Nov-20 12:49 AM Not at home 12-Nov-20 12:49 AM Eventually i can borrow one 12-Nov-20 12:51 AM Yeah I would just check what the things is actually trying do comand the stage to do 12-Nov-20 12:51 AM Multi channel digital oscilloscope? 12-Nov-20 12:52 AM Well that requires the program to do anything but i can't change anything 12-Nov-20 12:53 AM I mean just try a stage move? 12-Nov-20 12:53 AM Ah well yes 12-Nov-20 12:58 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/unknown-02635.png 12-Nov-20 12:58 AM So I would start with comparing the signals here during a stage move 12-Nov-20 12:58 AM Just want to figure out if the scope is actually trying to move it or not 12-Nov-20 12:58 AM Is there anything in software that makes you think it is not even trying to rotate, or is it just not rotating? 12-Nov-20 01:05 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20200526_1542472-4ECE1.jpg 12-Nov-20 01:05 AM Normally the computer beeps if it hits a limit or blocks a movement because of the holdersize it doesn't beep for rotation 12-Nov-20 01:05 AM And there is a completely differnt holder shown if i open it via tha main programm 12-Nov-20 01:05 AM The holder shown there is a big rectangular one, so i think that's why rotation is not possible 12-Nov-20 01:05 AM So I would start with comparing the signals here during a stage move @AdamMcCombs that will be fun to probe since it's a plug in module haha 12-Nov-20 01:11 AM You dont have a riser card for it then? 12-Nov-20 01:11 AM The riser card should have come with the scope... 12-Nov-20 01:11 AM Nope i didn't 12-Nov-20 01:12 AM Ah damn 12-Nov-20 01:12 AM Can you send a pic of the backplane your scope has? 12-Nov-20 01:12 AM I might an extra one 12-Nov-20 01:15 AM i will im currently not at my lab 12-Nov-20 01:15 AM apperently the users before tried to add a new holder, this is done via text editor. Well and they had a typo like , instead of a . and after that the stage was in this state 12-Nov-20 01:15 AM i only met the owners once, that was where i disassambled it for shipping..and well they did a few no go things with the sem 12-Nov-20 01:15 AM such as crashing the probe several times, fortunatly jeol replaced everything just 2 weeks before i picked it up 12-Nov-20 03:40 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20201112_124027-FE7BF.jpg 12-Nov-20 08:07 AM I've inherited a bunch of slides from my uncle, who travelled a lot from 1960-1980. A bunch from the USSR, any idea what this sign is saying? 12-Nov-20 08:07 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/Screen_Shot_2020-11-12_at_8.06.31_AM-80777.png 12-Nov-20 08:41 AM Given the years and word “plana” I think this is pertaining to a 5 year plan. 12-Nov-20 08:41 AM Either outlining the goals to be achieved, or celebrating what was achieved. 12-Nov-20 08:41 AM I see words for gas, steel, machinery, electricity. Just using my very small Russian vocabulary and not resorting to Google translate. 12-Nov-20 08:41 AM Better resolution would help with the small print. 12-Nov-20 08:41 AM All the arrows and charts are going up. Because the Soviet command economy is great, да? 12-Nov-20 05:38 PM https://arxiv.org/abs/2010.00453 lol the titles 12-Nov-20 05:40 PM They're shooting for JACS with that title 12-Nov-20 05:40 PM Which ngl I'd be kind of mad about because that's relatively obvious 12-Nov-20 05:40 PM Unless the experiment was particularly outstanding I guess 12-Nov-20 05:41 PM they do a lot 12-Nov-20 05:41 PM were having some fun with how solar radiation causes anthracene to form dimers 12-Nov-20 05:41 PM but slowly 12-Nov-20 05:41 PM a very slow very efficient thing iirc 12-Nov-20 11:17 PM It’s 11:16 at night here, and I am looking up tubular high voltage resistor part numbers. I think I have a problem I know I should be sleeping, but...... 13-Nov-20 05:19 AM has some scary looking button and keyswitch now 13-Nov-20 05:19 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/20201113_211715-6823F.jpg 13-Nov-20 05:19 AM more and more parts are coming in for the laser driver chassis 13-Nov-20 05:19 AM soon it will be time to drill and assemble stuff 13-Nov-20 05:22 AM that's not scary looking, that's safety looking 13-Nov-20 05:22 AM 'tho a big red safety button might imply some danger 13-Nov-20 05:23 AM I still have yet to figure out the water cooling 13-Nov-20 05:23 AM still lack other parts too 13-Nov-20 05:23 AM like HVDC capacitor 13-Nov-20 05:26 AM bzzt 13-Nov-20 05:26 AM specs of the cap you're looking for? 13-Nov-20 05:26 AM 1400 VDC, 100 uF 13-Nov-20 05:26 AM basically I am just copying some parts of the Chinese design 13-Nov-20 05:26 AM since I don't actually know the flashlamp spec too much 13-Nov-20 05:27 AM yikes 13-Nov-20 05:27 AM ...I might have something like that, lemme check 13-Nov-20 05:28 AM so I figure that I don't want to screw around with sizing the cap 13-Nov-20 05:28 AM so I am using that value wholesale 13-Nov-20 05:30 AM 80 uF 3 kV and 50 uF 2.5 kV is what I have 13-Nov-20 05:30 AM pulse rated 13-Nov-20 05:30 AM I see 13-Nov-20 05:30 AM the Chinese use these 13-Nov-20 05:30 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/6d00245b2a-E2C62.png 13-Nov-20 05:30 AM it looks like a motor start capacitor 13-Nov-20 05:30 AM ¯\_(ツ)_/¯ 13-Nov-20 05:30 AM tbh I wonder - what happens if I double the capacitance 13-Nov-20 05:30 AM tbh I don't know the explosion energy constant of these Chinese flashlamps 13-Nov-20 05:31 AM you'll get twice the energy! 13-Nov-20 05:32 AM I mean sure 13-Nov-20 05:32 AM but I don't want a broken laser after that 13-Nov-20 05:32 AM I could sacrifice a laser for messing around though 13-Nov-20 05:47 AM :D 13-Nov-20 06:57 AM Should be able to get a rough calc of explosion energy given the specs (length, diameter, pressure, etc.) 13-Nov-20 07:09 AM Well yes but pressure ist really difficult to find out if it is not mentioned anywhere. The capacitor they used will give something like a few thousand shots at it's best. There is a are in the "Energy/Lifetime" chart wich is roughly linear. If you want more energy but a decent lifetime definitely use tge simmering technique 13-Nov-20 07:09 AM area* 13-Nov-20 07:09 AM Also for efficient pumping the pulseforming network should be matched. Simmering will also give you a shorter pulselength 13-Nov-20 10:14 AM coffee needed 13-Nov-20 10:15 AM hands @Noxz coffee 13-Nov-20 10:15 AM cheers 13-Nov-20 10:15 AM I do have an eespresso in hand 13-Nov-20 10:16 AM and I am deciding between coffee or Milo 13-Nov-20 10:16 AM Milo? 13-Nov-20 10:16 AM https://en.wikipedia.org/wiki/Milo_(drink) 13-Nov-20 10:16 AM ohhh 13-Nov-20 10:16 AM I have some chocolate milk powder, I usually only have it during winter 13-Nov-20 10:17 AM I see 13-Nov-20 10:24 AM coffee it is! 13-Nov-20 10:24 AM now I need to think what I wanna do - work on the laser driver UI 13-Nov-20 10:24 AM or work on the laser power chart plotter 13-Nov-20 10:24 AM PCB layout at least 13-Nov-20 10:24 AM this is what it looks like for now 13-Nov-20 10:24 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/unknown-BE010.png 13-Nov-20 10:24 AM ATTiny85 for capturing data from the calorimeter to send via softUSB 13-Nov-20 10:24 AM I think the USB power should be able to power the boost converter and thus the calorimeter 13-Nov-20 10:24 AM I think 13-Nov-20 10:24 AM hmmmm I'll work on the UI 13-Nov-20 10:39 AM milo + coffee is good too 13-Nov-20 11:29 AM Is that Eagle? 13-Nov-20 11:31 AM KiCAD! 13-Nov-20 11:33 AM Cool. 13-Nov-20 11:33 AM I’m still upset at Autodesk screwing over the maker community by nerfing the Fusion 360 license. 13-Nov-20 11:35 AM I never got used to Eagle tbh 13-Nov-20 11:35 AM I did. 13-Nov-20 11:43 AM they undid the major nerf though 13-Nov-20 11:43 AM the .step exports 13-Nov-20 11:43 AM I used Eagle for one project, a decade ago. The current project I am involveed in uses KiCAD (completley opensource aim) so that's what is loaded up, but I dont actively use it for moree than tracing proper connections (buddy checking beforee having the boards spun up) 13-Nov-20 11:47 AM Wait step export is available again?!? 13-Nov-20 11:47 AM yeah it is 13-Nov-20 11:47 AM they reversed that 13-Nov-20 11:47 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/unknown-0260D.png 13-Nov-20 11:55 AM Yay! 13-Nov-20 11:56 AM I was looking to try F360 out tbh 13-Nov-20 11:56 AM nope 13-Nov-20 11:56 AM not anymore 13-Nov-20 12:17 PM is there an alternative? 13-Nov-20 12:17 PM one that a hobbyist can afford 13-Nov-20 12:23 PM onshape kind of 13-Nov-20 12:24 PM does that run on linux? 13-Nov-20 12:25 PM it's cloud based 13-Nov-20 12:25 PM so yeah, kinda 13-Nov-20 12:26 PM so it needs an internet connection? 13-Nov-20 12:26 PM can't use that, need offline 13-Nov-20 12:28 PM Models are stored in the autodesk cloud, you can save your models offline but I don't know if you can still edit them offline, going to try that out 13-Nov-20 12:28 PM Yes and no, you can edit a model offline but you still need to sign in to start the software (maybe there is a way around that?) 13-Nov-20 12:35 PM fusion had a way to set it to offline if you know you were going to go offline 13-Nov-20 01:25 PM If you got in on their $310/yr locked in pricing fusion is pretty affordable for what it is...I just hate how you do not actually own the software. A very common and frustrating situation these days. 13-Nov-20 01:25 PM For their $495/yr current rates I would probably be looking elsewhere though. 13-Nov-20 01:25 PM Really wish there was a decently featured freeware CAM package but last time I tried the options that worked with FreeCAD they were pretty buggy 13-Nov-20 02:14 PM is there an alternative? @GigaSquirrel I'm doing well using FreeCAD, I also use i for CAM. It does have a few annoying issues, but it develops to a increasingly useful tool 13-Nov-20 02:14 PM Really wish there was a decently featured freeware CAM package but last time I tried the options that worked with FreeCAD they were pretty buggy @LRM I've been doing a lot with FreeCAD CAM. Milling holes, pockets and the like. I agree that it has bugs, but from my experience it is useable 13-Nov-20 02:21 PM Yeah it worked alright when I tried it but the bugs were to the point that I did not feel comfortable running the gcode in anything besides a simulator 13-Nov-20 02:21 PM Had to go back in and fix things by hand for anything more complicated than a simple round or rectangular pocket 13-Nov-20 02:27 PM I've done things that were a lot more complicated and they worked well. G-Code was always fine 13-Nov-20 02:31 PM How recently? Maybe I should check it out again...has been a couple years now since I was looking around at the different CAM options before settling on fusion 13-Nov-20 02:34 PM I've been using 0.18 daily on Ubuntu most of the time. Probably since 2018 13-Nov-20 02:34 PM This was one of my more complicated things. It milled just fine with G-Code export set as GRBL, as that is what the CNC machine reads 13-Nov-20 02:34 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/rotrafo-CC15E.png 13-Nov-20 03:05 PM https://www-s.nist.gov/srmors/view_detail.cfm?srm=2387 why do they have this? 13-Nov-20 03:05 PM That isn't even close to the most "What???" thing they have 13-Nov-20 03:05 PM https://www.smithsonianmag.com/science-nature/weird-world-nist-standard-reference-materials-peanut-butter-whale-blubber-180954379/ 13-Nov-20 04:52 PM Our makerspace bought a CNC mill with tool changer. We built all our training around Fusion 360. And now Fusion 360 CAM won’t work with the tool changer. 13-Nov-20 04:53 PM yikes 13-Nov-20 04:58 PM I "bought" into BRLCAD, but I had to write a Python wrapper around it, and either got burned out in doing so, or just don't need CAD enough 13-Nov-20 04:58 PM https://github.com/nmz787/python-brlcad-tcl 13-Nov-20 04:58 PM It's pretty parametric https://github.com/nmz787/python-brlcad-tcl/blob/master/examples/motor_28BYJ_48__example.py 13-Nov-20 04:58 PM And the nice thing is they have TONS of converters for output https://github.com/nmz787/python-brlcad-tcl/blob/master/examples/output/motor_28BYJ_48__example.stl 13-Nov-20 04:58 PM (well and also input) 13-Nov-20 07:13 PM https://twitter.com/sashasoftshark/status/1327422688177033217 13-Nov-20 07:56 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/firstPage-S1551929500066177a-BF9B5.jpg 13-Nov-20 07:56 PM I always love old marketing materials 13-Nov-20 09:20 PM I may get a modified Demon Core Home Playset to go with my Phantasm Orb. 14-Nov-20 01:12 AM ohh I want a demon core 14-Nov-20 01:12 AM ...model 14-Nov-20 01:12 AM with a tungsten sphere inside 14-Nov-20 01:18 AM ...model @GigaSquirrel what? do you not like criticality? 14-Nov-20 01:18 AM I mean 14-Nov-20 01:18 AM who doesn't. but I like it in a more controlled fashion 14-Nov-20 01:19 AM a flat blade screwdriver manipulating the thing is a form of control 14-Nov-20 01:24 AM seriously though, the radiation sickness from acute radiation exposure those scientists had 14-Nov-20 01:24 AM is just the epitome of: "Not Only Will This Kill You, It Will Hurt the Whole Time You're Dying" 14-Nov-20 01:24 AM I just wonder if this could be likened to a really rapid onset and development of cancer, except non localized 14-Nov-20 01:24 AM since after all, your cells no longer divide properly, etc 14-Nov-20 02:04 AM So if anyone actually builds this would anyone want to do a group buy on it? 14-Nov-20 02:04 AM I for one defenitly want to have one sitting on my desk 14-Nov-20 09:17 AM [read the wiki].. the carbide bricks or th eberrylium half sphere (as the others reeplicated) ? 14-Nov-20 09:17 AM also, I almost feel like a hidden capacitance sensor and a speaker or something, make it a game, eetec, would be mor einteresting than just a paper weight 14-Nov-20 12:13 PM since after all, your cells no longer divide properly, etc @SleepyOwl Joyce death isn't even an appropriate word, these people were just erased 14-Nov-20 12:13 PM The information that made up their existence, gone in a flash of light 14-Nov-20 12:16 PM criticality accident != nuclear explosion 14-Nov-20 12:16 PM Still erased 14-Nov-20 12:16 PM no? 14-Nov-20 12:16 PM they usually live on for days or weeks 14-Nov-20 12:16 PM and it's not like every single one of their cells was damaged 14-Nov-20 12:17 PM Yes, the DNA, erased. The information about how to continue existing is corrupt. 14-Nov-20 12:19 PM but not completley 14-Nov-20 12:19 PM not every cell is corrupted 14-Nov-20 12:19 PM in fact the majority is still intact, or they would just drop dead then and there 14-Nov-20 12:20 PM Some nearly did like that guy who was stirring the Pu waste processor bin 14-Nov-20 12:20 PM He lived less than 30 hours afterward 14-Nov-20 12:21 PM I don't think you understand the implications of every single cell in your body being damaged 14-Nov-20 12:21 PM think... soup 14-Nov-20 12:22 PM From what I read the cells damaged by radiation usually don't die until they try to divide and the sanity checks start kicking in. Until then, it is a zombie but still mostly functioning cell. 14-Nov-20 12:23 PM That is kind of a bogus answer, it depends what gets damaged 14-Nov-20 12:23 PM DNA isn't just used during replication 14-Nov-20 12:23 PM It was the explanation I heard for why rapidly dividing cells like marrow and cillia tend to be first to die in radiation sickness. 14-Nov-20 12:24 PM Radio and chemo mutation also causes cells to NEVER die 14-Nov-20 12:24 PM I.e. cancer 14-Nov-20 12:25 PM Yes it would have been interesting to know how many cells developed cancer and how many die promptly in ARS 14-Nov-20 12:25 PM The research on ARS is unsurprisingly sparse 14-Nov-20 01:46 PM @GigaSquirrel it says the delivery man is 8 stops away from giving me my new phone 14-Nov-20 01:46 PM woo! 14-Nov-20 01:46 PM 61 or 62? 14-Nov-20 01:46 PM or something completley different? 14-Nov-20 01:46 PM you can't wait for the surprise?!? 14-Nov-20 01:46 PM nope XD 14-Nov-20 01:47 PM heh, I went with the 62 in thee end.. it just nudged out the 61 14-Nov-20 01:47 PM booo! 14-Nov-20 01:48 PM I'll be looking at all of thee house insullation stuff in depth, as thee earliest thermal imaging stuff 14-Nov-20 01:48 PM wow, I gotta finish reversing this vintage keyboard, or slap a new 'e' key on this guy, it's getting bad! 14-Nov-20 01:49 PM eeeeeeeeee 14-Nov-20 01:50 PM I have another one of these Alps based keyboards.. should just harvest a switch from it.. it has some non tactile keys in it to begin with 14-Nov-20 01:50 PM never been on linear beforee, theee hall effect will certainly be interesting 14-Nov-20 01:54 PM is rocking my model M 14-Nov-20 01:55 PM I gave my Model M away 14-Nov-20 01:55 PM not beecause I didn't like it, I loveed it, but I was moving in with some dudes that said 'hell no' 14-Nov-20 01:55 PM so I gavee it to the friend that introduced me to mechanical keyboards 14-Nov-20 01:55 PM [6 stops away] 14-Nov-20 01:56 PM oof 14-Nov-20 01:56 PM no 14-Nov-20 01:56 PM would look for a new flat in that case 14-Nov-20 01:56 PM XD 14-Nov-20 02:12 PM it has arriveed 14-Nov-20 02:14 PM wooo! 14-Nov-20 02:16 PM welp, that was short lived.. my service provider website says the imei isnt compat 14-Nov-20 02:16 PM I havent even unboxed it 14-Nov-20 02:16 PM what? 14-Nov-20 02:16 PM international version is not so international?? 14-Nov-20 02:16 PM yeah wth 14-Nov-20 02:16 PM maybe it's a metric imei 14-Nov-20 02:18 PM description states it should.. should I even try it then? 14-Nov-20 02:19 PM I mean you can't break it that way, can you? 14-Nov-20 02:21 PM I am chatting with service provider now 14-Nov-20 02:21 PM they are cross-checking info 14-Nov-20 02:26 PM just turn it on and try ^^ 14-Nov-20 02:29 PM now they are telling me it likely wont have VoLTE, which is my current issue with my current phone 14-Nov-20 02:30 PM lol 14-Nov-20 02:31 PM lol, The Cat S62 Pro is not intended for sale or warranty support in the USA or Canada, and is not available to purchase in these markets. 14-Nov-20 02:31 PM https://www.catphones.com/en-us/help-support/s62-pro-support/ 14-Nov-20 02:31 PM how come that didnt show up a week ago? 14-Nov-20 02:33 PM rofl 14-Nov-20 02:33 PM difference between the 62 and 62 pro? 14-Nov-20 02:33 PM there is no non-pro 14-Nov-20 02:35 PM lol 14-Nov-20 02:40 PM google's snapshot of the page is from yesterday.. so I have a feeling it didnt really exist too reecently 14-Nov-20 02:40 PM service provider says to maybe reach out to Cat to see if an update is in the works to support VoLTE in the states or not 14-Nov-20 02:40 PM called their number, and their support is M-F 14-Nov-20 02:40 PM like, who in the world doesnt offer support on the weekends 14-Nov-20 02:40 PM shakes his head 14-Nov-20 02:40 PM there went all the excitement 14-Nov-20 02:42 PM I'll assume you mean "mighty fine" 14-Nov-20 02:42 PM I knew this may have occured, because I had no IMEI to test 14-Nov-20 02:43 PM isn't cat from the USA? 14-Nov-20 02:43 PM bullitt makes the phones though 14-Nov-20 02:43 PM Cat is all over, I imagine 14-Nov-20 02:44 PM Main Offices United Kingdom 14-Nov-20 02:44 PM huh 14-Nov-20 02:44 PM the voice recording tellnig me the hours was british 14-Nov-20 02:44 PM meh... okay, no thermal imaging just yet 14-Nov-20 02:44 PM bummer 14-Nov-20 02:44 PM okay... no other phone looks like a winner in comparison 14-Nov-20 02:44 PM I could go with the s61, but meh 14-Nov-20 02:44 PM actually, even that one may not support VoLTE w/ tmobile 14-Nov-20 02:44 PM just ridiculous 14-Nov-20 02:44 PM I mean, there is: https://www.crowdsupply.com/sutajio-kosagi/precursor 14-Nov-20 02:44 PM one module they state is an LTE modem 14-Nov-20 02:44 PM I met bunny in person before, listened to a talk by him at a MakerFaire 14-Nov-20 02:44 PM will take a year to get it though! 14-Nov-20 02:58 PM I’m still using an iPhone 5S 14-Nov-20 02:58 PM 16GB model 14-Nov-20 02:58 PM Purchased on release 14-Nov-20 02:58 PM With original battery 14-Nov-20 03:00 PM 2g/3g support will be dropped on a few service providers (tmobile) come the new year.. and current phone doesnt have VoLTE, so I wont be able to SMS or voice call 14-Nov-20 03:00 PM not that the phone doesnt have VoLTE capabilities, but tmobile+sony dont want to be friends 14-Nov-20 03:00 PM anymore 14-Nov-20 03:00 PM horseshit 14-Nov-20 03:01 PM Two Canadian service providers did a dirty, and started sharing towers while excluding the third big company 14-Nov-20 03:01 PM So coverage is quite excellent but prices are very... gross 14-Nov-20 03:06 PM Here they passed a law that the operators had to share towers 14-Nov-20 03:06 PM as the nineties tower race was quite something 14-Nov-20 03:06 PM 3x operaotrs 14-Nov-20 03:06 PM all building their own exclusive towers everywhere :D 14-Nov-20 03:06 PM Sometimes having stuff like 100m towers 100m from each other 14-Nov-20 03:16 PM I am generally mad about this phone, heh... but yeah, w/o an IMEI number on hand it was hard to guess 14-Nov-20 03:16 PM I'll give Cat a call on Monday 14-Nov-20 05:06 PM @Addison-110m that demon core is just plain cursed. I want one. 14-Nov-20 05:06 PM I’m in the middle of mass 3D printing stuff.... hmmmm.... 14-Nov-20 05:06 PM Amazon Prime has a 2” ball bearing for $23, a 3” for $34. 14-Nov-20 05:08 PM it is 3.5" 14-Nov-20 05:08 PM Not a standard ball bearing size I can find. 14-Nov-20 05:08 PM sure, and I dont have spherical turning capabilities, yet 14-Nov-20 05:11 PM I found one supplier who has 3 1/2” chrome steel for $99 14-Nov-20 05:12 PM I wonder if spray painting a plastic ball of the right sizee would be cheaper 14-Nov-20 05:15 PM Or going with 3” 14-Nov-20 05:24 PM and real beryllium? 14-Nov-20 05:36 PM Any volunteers to machine and surface grind the beryllium? Didn’t think so.... 14-Nov-20 05:36 PM Depending on infill and support, about a half kilogram of filament at 3”. A lot less if you use the mini 2” version. 14-Nov-20 06:03 PM @rdpierce You could always check if there's a metric one close enough to 3,5inches 14-Nov-20 07:03 PM Ok you win. 14-Nov-20 07:03 PM https://www.aliexpress.com/item/4000163451554.html?spm=a2g0o.productlist.0.0.2d8371fa8ecEHp&algo_pvid=54f5b949-6aa7-4523-8af8-4d9124722506&algo_expid=54f5b949-6aa7-4523-8af8-4d9124722506-22&btsid=0b0a556816054092936383737e5d8c&ws_ab_test=searchweb0_0,searchweb201602_,searchweb201603_ 14-Nov-20 07:03 PM That’s going to take a lot more printing though. 14-Nov-20 07:10 PM Well it's not like you are forced to make a 1:1 replica of it 14-Nov-20 07:22 PM Lighter weight: hollow stainless spheres: 14-Nov-20 07:22 PM https://www.aliexpress.com/item/32777929697.html?spm=a2g0o.productlist.0.0.2d8371fa8ecEHp&algo_pvid=54f5b949-6aa7-4523-8af8-4d9124722506&algo_expid=54f5b949-6aa7-4523-8af8-4d9124722506-26&btsid=0b0a556816054092936383737e5d8c&ws_ab_test=searchweb0_0,searchweb201602_,searchweb201603_ 14-Nov-20 07:41 PM I suppose you could also drill a small hole on the underside and fill the inside with lead to get the density more correct 14-Nov-20 08:33 PM I'm trying to finish up an optical scope rebuild tonight 14-Nov-20 08:33 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/PXL_20201115_043028991-E80A2.jpg 14-Nov-20 08:33 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/PXL_20201115_043444119-E4489.jpg 14-Nov-20 08:33 PM Best thing I have done to improve my process in cleaning optical scopes is to wrap my own cotton swabs using webril optical grade cotton 14-Nov-20 11:08 PM Bespoke swabs. Dang, son. 14-Nov-20 11:24 PM It's hard to explain why it works so much better but it does 14-Nov-20 11:24 PM Getting optics truly clean without removing them completely is truly a dark art and I have a lot of appreciation for those who can do it 14-Nov-20 11:24 PM It's really easy to get optics like 90-95% of the way there 14-Nov-20 11:24 PM Getting that last little bit off is where it gets challenging 14-Nov-20 11:30 PM downside of big powerful laser is that if there is dust on any elements, it will burn the dust and destroy the element 14-Nov-20 11:32 PM Yeah its quite the sight. 14-Nov-20 11:32 PM It seems like you can usually do drag cleaning most of the time on that type of stuff though which is so much easier than inside of a scope with limited access 14-Nov-20 11:32 PM I'm starting to think its faster to just completely remove the optics and clean them some other way 14-Nov-20 11:32 PM But I dont have the alignment jigs for this microscope so re-assembly would be hard 14-Nov-20 11:56 PM @Noxz Did you learn of any good recourses that talk about lubrication selection for fine mechanical systems while it school? 15-Nov-20 12:04 AM not in school - but I have a book on it 15-Nov-20 12:04 AM iirc libgen has it, but I wanted a physical copy 15-Nov-20 12:04 AM https://www.elsevier.com/books/tribology-of-miniature-systems/rymuza/978-0-444-87401-6 15-Nov-20 12:04 AM I can give basic rules of thumb.. based on where in the drivetrain it is 15-Nov-20 12:04 AM and Moebius, the major fine oil brand, likely has a decent guide if that's all you need 15-Nov-20 12:04 AM vs actual calculations like the book offers 15-Nov-20 12:04 AM on modern chronographs I use 6 different oils/greases 15-Nov-20 12:49 AM I mean I'm not going to be using it on watches, but there's several different types of types of mechanisms I work with regularly and I think there's room to optimize my grease selection 15-Nov-20 12:49 AM Like in this case I want a little bit of resistance, but just enough to help keep the slider in place 15-Nov-20 12:49 AM Also I want to minimize static friction to make it feel as smooth as possible 15-Nov-20 12:49 AM Should I be looking at stuff like what's used in the barrel wall or? 15-Nov-20 07:27 AM @Noxz is there an oiling reference for modern oils and greases on old pocket watches? 15-Nov-20 08:35 AM I dont know if theree is a ref out there, just kid of rules of thumb.. I meean, back in thee day, they used to oil the pallet pivots - and that isnt done anymore 15-Nov-20 08:35 AM so it may all depend 15-Nov-20 08:35 AM regarding automatic barrel grease.. it looks black and the assunmption there is that graphite is in it.. those mainsprings are deesigned to slip once wound up a bit - but they have some constant force against it as well 15-Nov-20 08:35 AM so, depending on load, possible 'normal' (watch normal) grease, for instance on neear any metal-metal contact such as the setting mechanism, may be desired 15-Nov-20 08:35 AM I used Rolex stuff near all of this past year, which is not commercially available 15-Nov-20 08:35 AM but Moebius has comparable greases, they'ree typically blue and I just didnt like hte look, if even a th in film, over the translucent yellow R stuff 16-Nov-20 09:58 AM just spoke with catphones, they expect to release a US version come xmas/new years.. so I'll send this one back, and then maybe just wait it out... I would love to give the FLIR a small test run right now with how I have the insullation and windows though.. I still havent even opened up the box yet 16-Nov-20 09:58 AM heh, amazon is telling me my reeturn by date is Jan 31st..... 16-Nov-20 09:58 AM ... so I open it and use it? if only for a few FLIR photos? 16-Nov-20 09:58 AM they shouldnt even be in the US 16-Nov-20 10:05 AM yeah that's pretty dumb 16-Nov-20 10:06 AM they basically said to subscribe to the mailing list because they are weak on marketing 16-Nov-20 10:06 AM but - yeah, it looks like one is coming to the US very shortly.. can I hold out? will tmobile just flip a switch to turn off 2g/3g on new yeears day? 16-Nov-20 10:06 AM can I survive a month w/o calls? 16-Nov-20 10:06 AM etc 16-Nov-20 10:06 AM and yeah, should I takee some flir photos, or be nice and not touch the phone 16-Nov-20 10:06 AM the plasn is to have the insullation and windows replaced before ethe new phonee comes out :/ 16-Nov-20 10:06 AM so, no real data to compare at that point 16-Nov-20 10:06 AM I guess I got some decent info regarding time frame.. better than, say, July 2021 16-Nov-20 03:24 PM @Noxz if you need a phone for the interim, just grab one of the cheapo phones at i.e. fred meyer or walmart 16-Nov-20 03:24 PM I got a great performer years ago for a trip out of the country for like $30 16-Nov-20 03:37 PM I dont make too many phone calls - so even if the relase is end of january (it sounded more like xmas from on the phone with Cat) then I should still be okay 16-Nov-20 03:37 PM my current phone more or less works, crappy photos and whatnot, and no FLIR which was the whole reason for picking the new model 16-Nov-20 03:46 PM Honestly I would probably prioritize the color camera over the thermal and then go with an external thermal camera 16-Nov-20 03:46 PM Going with a more main stream phone would get you updates faster and more support from carriers 16-Nov-20 03:47 PM I like the idea of a rugged work phone, specially whilee still doing home reeno, and now machining a bit moree 16-Nov-20 03:47 PM I say this having had some of the ultra rugged phones and just non stop having to deal with software and comparability issues 16-Nov-20 03:48 PM hrm 16-Nov-20 03:48 PM I also just got the seek compact pro camera and really like it 16-Nov-20 03:49 PM ahh 16-Nov-20 03:49 PM I dont particularly neeed thermal imaging everyday in my pocket.. so I've pondered just getting a standalone unit 16-Nov-20 03:50 PM Yeah where as a phone that does great macro would probably see a lot more use 16-Nov-20 03:50 PM but, also, I neeed a new phone.. so I still need to figure that out if I dont go with the US release 16-Nov-20 03:51 PM Yeah the seek camera case is about as small as my earbud case so it's not a problem to carry with me 16-Nov-20 03:51 PM right, those phone modules are an interesting aspect/alternative 16-Nov-20 03:52 PM The compact pro has better specs than most of the flir stuff as well I believe 16-Nov-20 03:52 PM But yeah I've pretty much decided that the most important things to me are good, stable software and the camera 16-Nov-20 03:52 PM And I just couldn't find that in the rugged phones 16-Nov-20 03:53 PM I do take quitee a few photos, and the main camera on the cat was rated at mediocre 16-Nov-20 03:53 PM I dont exactly share them much 16-Nov-20 03:53 PM I've got a pixel and the camera is just unreal how good it is at everything 16-Nov-20 03:53 PM Macro and low light especially 16-Nov-20 03:53 PM pixel 5a I think is a compact version? was half looking at that 16-Nov-20 03:54 PM Handheld low light performance is better on my phone than my dslr 16-Nov-20 03:54 PM Yeah the 5a is the compact one 16-Nov-20 03:54 PM I have a 3 but I'm looking at the 5a 5g if I need to upgrade 16-Nov-20 03:54 PM Well 3xl 16-Nov-20 03:54 PM I like bigger phones 16-Nov-20 03:55 PM I have enjoyed my compact sony phone 16-Nov-20 03:55 PM beyond no VoLTE 16-Nov-20 03:55 PM I am not on it long enough throughout the day to enjoy a large screen 16-Nov-20 03:56 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG_20201023_202638-9633A.jpg 16-Nov-20 03:56 PM I know that there's no scale, but this is the quality of macro shots I get with mine 16-Nov-20 03:56 PM looks crisp 16-Nov-20 03:56 PM I have reeplaced the back on my phone too many times to even caree about the camera quality 16-Nov-20 03:57 PM Lol little bit of contamination? 16-Nov-20 03:57 PM people ask if I used a potato or banana to take a photo 16-Nov-20 03:57 PM just alittle 16-Nov-20 03:57 PM the back sis currently broke and peeling, so dust always gets in 16-Nov-20 03:57 PM Ah yeah that sucks 16-Nov-20 03:58 PM I had good performance after cleaning it all at some point, but I am not about to get anothre back 16-Nov-20 03:58 PM That happened on one of my droids as well 16-Nov-20 03:58 PM why they are made of glass is beyond me 16-Nov-20 03:58 PM I was half considering this for a moment: https://www.nokia.com/phones/en_gb/nokia-2720-flip 16-Nov-20 03:59 PM I see the appeal 16-Nov-20 03:59 PM but yeah, nothing really ended up on the list like the cat 16-Nov-20 04:00 PM But on the thermal camera topic, on of the questions is do you want better thermal resolution or the appearance of better resolution 16-Nov-20 04:00 PM Referring to how flir mixes the visual and thermal data 16-Nov-20 04:00 PM Other reason I went with seek was the better macro performance with the manual focus lens and the option to put a germanium macro lens on it to enhance it further 16-Nov-20 04:00 PM But then again I'm interested in looking at component level stuff a lot so... 16-Nov-20 04:00 PM Also when I'm saying resolution I should specify I'm talking sensor size not how good it is at measuring temperature 16-Nov-20 06:27 PM I've also got a pixel2, photos are great 16-Nov-20 06:27 PM If I were to upgrade, I'd buy directly from google so I could get a root able version 16-Nov-20 06:27 PM So I could installed "hacked" apps for the android auto (in car) display 16-Nov-20 06:27 PM They have all these horribly stupid design limitations in the name of safety 16-Nov-20 07:05 PM https://www.youtube.com/watch?v=QmVwCcUQRjU&feature=share this was a toral suprise to see Brent Spiner pop up in something like this. 16-Nov-20 11:21 PM telnet 54.144.149.167 16-Nov-20 11:40 PM NUCLEAR HMI v1.45 PRODUCTION BUILD 16-Nov-20 11:40 PM what's this? 16-Nov-20 11:40 PM Should I be worried about getting on some sort of watchlist? 16-Nov-20 11:40 PM Will I be SWAT'ed? 16-Nov-20 11:40 PM https://tenor.com/view/f-bi-raid-swat-gif-11500735 16-Nov-20 11:54 PM Love a good exposed HMI 17-Nov-20 12:06 AM somebody fell for it... 17-Nov-20 12:06 AM you're on the watchlist of one australian furry now 17-Nov-20 03:08 AM Everybody knows you don’t want to get on the watch list of furries. They are friends not enemies, and they quietly control all the internet and economy and everything everywhere 17-Nov-20 03:14 AM can confirm 17-Nov-20 03:16 AM I'm friends with a few so whatever lol 17-Nov-20 03:17 AM and at this exact moment this pops up on my twitter 17-Nov-20 03:17 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/unknown-C6F0C.png 17-Nov-20 03:18 AM lol 17-Nov-20 04:23 AM Needs to be sanded and then some more filler and sanding until it’s smooth then aluminium-like paint 17-Nov-20 04:23 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/image0-101CF.jpg 17-Nov-20 04:23 AM Be-like paint 17-Nov-20 04:23 AM very nice, is that a ball bearing on the inside? 17-Nov-20 04:24 AM Yeah 2 inch bearing ball 17-Nov-20 04:25 AM noice 17-Nov-20 04:25 AM if only W wasn't so expensive 17-Nov-20 04:30 AM Yeah and W is also really hard to machine I think 17-Nov-20 04:31 AM oh absolutely, but you can already buy it in sphere shape 17-Nov-20 06:43 AM Furries are awesome. They created a Four Seasons Landscaping VR meetup. Complete with Presidential fire extinguisher, hose reel, and NFPA diamond. 17-Nov-20 06:43 AM https://twitter.com/thecoopertom/status/1325710953305026560?s=21 17-Nov-20 06:45 AM Fur seasons 17-Nov-20 06:46 AM clap clap 17-Nov-20 06:46 AM :3 17-Nov-20 06:47 AM @a_quiet_scientist that is so cursed.... 17-Nov-20 06:47 AM I’m going to be doing the whole sanding, filling, painting thing on BB-8 so I’m half tempted to print one. 17-Nov-20 07:16 AM And... the Four Seasons VR environment gets better. 17-Nov-20 07:16 AM https://twitter.com/thecoopertom/status/1326379770242883587?s=21 17-Nov-20 07:16 AM And... 17-Nov-20 07:16 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/image0-81201.jpg 17-Nov-20 07:19 AM (continuation from #radiation ) 17-Nov-20 07:19 AM I honestly don't understand that there are so many lgbtq in stem events, from my experience there are already a lot of us in stem, and many don't really want any attention, or rather no attention about their sexuality and more about the work they're doing 17-Nov-20 07:21 AM ¯\_(ツ)_/¯ 17-Nov-20 07:21 AM and besides sexuality, gender identity, etc shouldn't matter lol 17-Nov-20 07:22 AM exactly 17-Nov-20 07:22 AM I'm waiting for which time people are just: "Mehhh whatever" to that 17-Nov-20 07:22 AM Although I must say that there's still quite a gender gap/gender stereotype in STEM work 17-Nov-20 07:30 AM Yeah. While progress has been made in the US, it’s far from “mehhh whatever”. 17-Nov-20 07:30 AM And things are backsliding. 17-Nov-20 07:30 AM Already Alito is bemoaning the SCOTUS gay marriage decision. 17-Nov-20 07:30 AM “Religious Freedom” is now the code word for “allow Christians to be as bigoted and misogynistic as they want” 17-Nov-20 07:30 AM And transgender people are being thrown under the bus with targeted “bathroom bills” and Trump’s attempt to exclude trans persons from the military. 17-Nov-20 07:34 AM everybody's talking about what politician is pro or against gay marriage, but nobody is asking why the governemnt should have a say in it at all 17-Nov-20 07:38 AM The gender gap is also continually confused, at least in physics in Canada 17-Nov-20 07:38 AM Entering STEM from high school numbers aren’t great, but they’re nowehere near as bad as graduation rate (without transferring), continuing to grad school, post docs, or faculty positions 17-Nov-20 07:38 AM It just gets worse and worse each tier 17-Nov-20 07:38 AM As people get pushed out because bad environment. 17-Nov-20 07:38 AM At least here the government / main funding agency sees this as an issue, rather than it being a political question whether they do... 17-Nov-20 07:38 AM But most of the public resources seem to focus on getting people from high school, which isn’t where the biggest leak is. 17-Nov-20 11:37 AM SLAMS PAWS ON THE FURRY COUNTER 17-Nov-20 11:37 AM furries do in fact make the internets go 17-Nov-20 11:41 AM I am pretty sure it's network engineers and systems administrators and comms engineers that make the internet go 17-Nov-20 11:41 AM and guess what a huge part of them are 17-Nov-20 11:41 AM but if a number of them are also furries... 17-Nov-20 11:41 AM I am not sure it's that huge though 17-Nov-20 11:41 AM Hmmmm 17-Nov-20 11:42 AM I bet I have some kind of selection bias, but the folks in IT that I know... 17-Nov-20 11:42 AM Out of any random 100 people, how many are furries? 17-Nov-20 11:42 AM We need stats and quantifiable data lol 17-Nov-20 11:43 AM somewhere inbetween 0 and 100 17-Nov-20 11:43 AM Lol 17-Nov-20 11:44 AM I wish I had numbers 17-Nov-20 11:44 AM but I bet a majority isn't open / has come out 17-Nov-20 11:44 AM is certainly not a furry 17-Nov-20 11:45 AM says the owl 17-Nov-20 11:45 AM Owls aren't furry 17-Nov-20 11:45 AM birds are a subcategory of furry 17-Nov-20 11:45 AM so are planes methinks? 17-Nov-20 11:45 AM it gets weird quick 17-Nov-20 11:46 AM is avian 17-Nov-20 12:11 PM I really want a certain owl watch to be re-released to gift to someone who likes 'em 17-Nov-20 12:11 PM https://mrjoneswatches.com/products/timewise 17-Nov-20 12:11 PM afaik it wasnt a limitted release, so I expect it to show up again at some point 17-Nov-20 01:28 PM Although I must say that there's still quite a gender gap/gender stereotype in STEM work @SleepyOwl Joyce I know! My wife got one more degree than me AND makes like 50% more per month then I do 17-Nov-20 03:51 PM The WWII battleshipchan is where I nope out. 17-Nov-20 08:02 PM I know! My wife got one more degree than me AND makes like 50% more per month then I do lol 18-Nov-20 12:35 AM https://twitter.com/CERN/status/1328966539236814853 Heh, speaking of... 18-Nov-20 01:39 AM I didn't even know there was such a day lol 18-Nov-20 01:39 AM And CERN: what pun 18-Nov-20 01:47 AM pun? 18-Nov-20 01:47 AM On the accelerator 18-Nov-20 01:48 AM oh, right 18-Nov-20 01:48 AM that's their motto afaik 18-Nov-20 01:48 AM and they do accelerator science and engineering 18-Nov-20 01:52 AM Oh do they really? I wasn't aware of that :P 18-Nov-20 01:53 AM still waiting for the day when we don't actually need to celebrate LGBTQ+ folk in whatever field or place 18-Nov-20 01:53 AM because it's so normal by then that mehhh 18-Nov-20 02:00 AM same 18-Nov-20 02:02 AM looks at the comments in that thread 18-Nov-20 02:02 AM ewwww 18-Nov-20 02:03 AM also same 18-Nov-20 02:38 AM oh noes 18-Nov-20 02:38 AM https://gizmodo.com/second-cable-fails-at-arecibo-causing-even-more-damage-1845619120 18-Nov-20 02:39 AM oh no 18-Nov-20 02:39 AM again? 18-Nov-20 02:40 AM apparently 18-Nov-20 01:20 PM decided I was still at least a week or two away from cracking the hall effect keyboard protocol, and that double 'e' was getting annoying.. so I actually have two of this same Alps based keyboard.. other one had a few problems with a few keys, etc.. anywho, I yanked one of the switches and replaced this one.. and so far it's working great. I will still continue reversing the terminal keyboard. I may add these two to my to-reverse list as they use the same instruction set - but a lot less TTL, in fact, it has a switch for AT or XT protocol, so that part is likely not much of an issue then 18-Nov-20 08:48 PM lol what the heck FB 18-Nov-20 08:48 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/unknown-9A665.png 18-Nov-20 08:56 PM Wow, that is Q recruitment template post. A few minor tweaks for location, but wow. 18-Nov-20 10:01 PM if it aint broke ¯\_(ツ)_/¯ 18-Nov-20 10:01 PM cult recruitment is a pretty simple formula 18-Nov-20 10:42 PM honestly we don't need more pseudoscience or climate change denialism 18-Nov-20 10:44 PM No, but it seems to sell well. 18-Nov-20 10:45 PM because it's easy and convenient 18-Nov-20 10:45 PM you also have folks like my dad 18-Nov-20 10:45 PM who thinks that the best way for the climate situation to improve 18-Nov-20 10:45 PM is if COVID-19 or something more deadly comes along 18-Nov-20 10:45 PM wipes out a few billion people from the population 18-Nov-20 10:47 PM [fingerkisses] perfecto 18-Nov-20 10:47 PM The Stand is fiction, not a roadmap. 18-Nov-20 10:48 PM I think that needs to be a disclaimer on more distopian fiction 18-Nov-20 10:50 PM "Before reading this story, stop studying The Blade. Start studying hygiene and first aid." 18-Nov-20 10:52 PM "While not intended as such, The Road may be considered a useful resource in an applicable emergency situation" 18-Nov-20 10:54 PM "This story, while thought provoking and discusses elements of a dystopian future, is NOT intended to be a playbook for the creation of an all encompassing, pervasive authoritarian government" 18-Nov-20 10:55 PM "If you begin considering which neighbors and/or co-workers are the most edible while reading this, please consult a professional." 18-Nov-20 10:56 PM calls bunker vendor up 18-Nov-20 10:56 PM wow I didn't know that a bunch of mods have... such creative imaginations 18-Nov-20 10:56 PM also I must add 18-Nov-20 10:56 PM Kirby is the epitome of vore; change my mind 18-Nov-20 10:57 PM I keep trying to will #CannibalismBot into existence on twitter and it keeps not working. 18-Nov-20 10:58 PM That reminds me of relatives in oklahoma who built their house around what is primarily a gun safe room (more of a vault...), but figured it'd make an ok tornado shelter after the fact. 18-Nov-20 10:58 PM That sounds VERY familiar. 18-Nov-20 10:58 PM The risk assessment there could use a bit of work 18-Nov-20 10:58 PM Whenever we have reunions there it's all riding around on ATVs and Utility Vehicles with sawed off shotguns for the snakes and ar 15s for the hogs 18-Nov-20 10:58 PM Very different than living on the west coast 18-Nov-20 11:00 PM But good eatin'!!! 18-Nov-20 11:00 PM But speaking of twitter bots there was the time I made a twitter drinking game for whenever a new site sent out an article with EMP mentioned in it 18-Nov-20 11:01 PM It's all Marty's fault. I'm his designated drunk for EMP. 18-Nov-20 11:01 PM I made the bot for him 18-Nov-20 11:01 PM I should check in on it 18-Nov-20 11:01 PM It was years ago 18-Nov-20 11:02 PM shakes angryfist at McCombs 18-Nov-20 11:02 PM My poor, poor liver. 18-Nov-20 11:03 PM A: it was a mistake to log in to twitter 18-Nov-20 11:03 PM B: it's still going 18-Nov-20 11:03 PM It's tweeting more about covid than EMPs though lol 18-Nov-20 11:04 PM Did the bot discover EMPs defeat COVID? 18-Nov-20 11:04 PM No but it looks to have discovered a lot of market research on EMPs 18-Nov-20 11:04 PM Are you lucky enough to not constantly have the BS market research sites showing up in searches for you? 18-Nov-20 11:06 PM It doesn't happen to me on twitter much. I have my work email for researchers and members of the public to send them to me. 18-Nov-20 11:06 PM I keep a few Microscope related google alerts going and it's a pita to try to filter them out 18-Nov-20 11:06 PM https://prnewsleader.com/uncategorized/2052544/electron-microscope-market-astonishing-growth-by-2026-dover-weatherford-exceed-keruigroup/ 18-Nov-20 11:06 PM This one's good 18-Nov-20 11:07 PM I've got at least a few professors trained to stop, think for just a moment "Does this do what it claims to do?" or "Is this even remotely good idea?" before dropping me a line. 18-Nov-20 11:08 PM It doesn't even have any of the actual Microscope manufacturers in it 18-Nov-20 11:08 PM It seems like there's something more going on with these market research sites 18-Nov-20 11:08 PM I want to know to know how they make money 18-Nov-20 11:08 PM Feels a lot like penny stock stuff 18-Nov-20 11:09 PM [infinte sting of swearing] PR News Leader Okay, I have friend that owns a PR firm. He has taught me to have even more contempt for his field than I already had. The specific way that people in his field are lazy POS mail-merging bastards. 18-Nov-20 11:09 PM So yes, I get sent those things all the time. Usually for diagnostic x-ray stuff, which means they really don't understand what I do. 18-Nov-20 11:11 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/Screenshot_20201118-231042-C6389.png 18-Nov-20 11:11 PM Lol anyone who thinks dealing america is major player has something else coming for them 18-Nov-20 11:11 PM Like are people actually paid to write this shit? There's like 10-20 a day that get filtered out it looks like 18-Nov-20 11:11 PM And they aren't straight duplicates 18-Nov-20 11:11 PM I think it must be auto generated somehow 18-Nov-20 11:15 PM Never ascribe to algorithm that which can be explained by extremely lazy copy-pasting PR flunky who is measuring "outreach" by number of emails sent. 18-Nov-20 11:15 PM Ok fair 18-Nov-20 11:15 PM Different question 18-Nov-20 11:15 PM The hell is a fleet? 18-Nov-20 11:15 PM Is cannibalism related? 18-Nov-20 11:15 PM Is twitter instagram now? 18-Nov-20 11:16 PM Fleets may promote cannibalism. Not even one. 18-Nov-20 11:19 PM In other news, it has been zero days since I last purchased another electron microscope 18-Nov-20 11:19 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/Screenshot_20201117-140010-A0B69.png 18-Nov-20 11:20 PM Maybe? Never use Instagram. 18-Nov-20 11:20 PM Adam is Adam'ing at 100%. 18-Nov-20 11:20 PM I'm trying to 18-Nov-20 11:20 PM This is only like 80% 18-Nov-20 11:21 PM GO FULL ADAM 18-Nov-20 11:21 PM 100% was when the seller asked if I wanted to buy the second one he had laying around because I already had a truck coming there 18-Nov-20 11:24 PM Huh 18-Nov-20 11:24 PM No more quotes 18-Nov-20 11:24 PM wot 18-Nov-20 11:25 PM Only replies 18-Nov-20 11:25 PM Welcome to the next level 18-Nov-20 11:25 PM I didn't think that SEMs could be had for cheap lol 18-Nov-20 11:26 PM With the exception of one sem that's the most I have ever paid 18-Nov-20 11:26 PM I should stay in the US or somewhere with easy access to cheap equipment lol 18-Nov-20 11:27 PM Surplus equipment is like the only thing we have going for us 18-Nov-20 11:27 PM Shipping is going to be about 3x as much 18-Nov-20 11:28 PM I am not surprised 18-Nov-20 11:28 PM I will say that owning a SEM is beyond dreams here lol 18-Nov-20 11:29 PM Mind if I ask where here is? 18-Nov-20 11:29 PM Singapore 18-Nov-20 11:29 PM For multiple reasons heh 18-Nov-20 11:29 PM I mean there's definitely scopes there... 18-Nov-20 11:29 PM Oh yeah 18-Nov-20 11:30 PM But space? 18-Nov-20 11:30 PM Expensive as hell 18-Nov-20 11:30 PM And most of us stay in government leased apartments 18-Nov-20 11:30 PM I've seen a few cheap ones pop up there 18-Nov-20 11:30 PM Cheap ones? 18-Nov-20 11:31 PM Yeah like sub 1k 18-Nov-20 11:31 PM But unless it comes with space, could be tricky. 18-Nov-20 11:31 PM ^ 18-Nov-20 11:31 PM Mostly 5000 series JEOL. They are on the smaller side... 18-Nov-20 11:31 PM Where are you finding them? 18-Nov-20 11:31 PM That's a complicated question 18-Nov-20 11:31 PM A lot of it is just being in the industry 18-Nov-20 11:32 PM Ah, fair 18-Nov-20 11:32 PM When they come up though I try to find people who would like to get one and put them in touch 18-Nov-20 11:32 PM Most Microscopes that are free are all word or mouth type deals 18-Nov-20 11:34 PM Interesting 18-Nov-20 11:34 PM I do search a lot of auction sites as well 18-Nov-20 11:34 PM I can usually guess who else would bid on certain systems 18-Nov-20 11:35 PM Parts accumulation is a dark art in its own right. 18-Nov-20 11:35 PM It really is 18-Nov-20 11:35 PM I'm lucky to know a few masters of the dark arts 18-Nov-20 11:38 PM For the several of the UC campuses, I am the institutional memory of where a variety of parts and capabilities are. Databases exist to tell you what we have. There is no such database of what we can do other than my head. 18-Nov-20 11:39 PM If you ask freight companies about Microscopes most will say yeah they all go to the PNW for some reason, and that's the fault of me and a few other larger vendors out here 18-Nov-20 11:39 PM Heh 18-Nov-20 11:40 PM I've gotten oh this is going to Oregon? I'm not surprised from freight people before 18-Nov-20 11:40 PM oh lol 18-Nov-20 11:40 PM and makes sense about of a ton of things 18-Nov-20 11:40 PM the capabilities bit is a thing that always catches us at Reed 18-Nov-20 11:40 PM we just have so much turnover because undergrads 18-Nov-20 11:44 PM Reed as in Portland reed? 18-Nov-20 11:55 PM Yeah 18-Nov-20 11:55 PM Very cool 18-Nov-20 11:55 PM Well if you ever want a sem there's a lot floating around down there 18-Nov-20 11:57 PM I'll keep my eyes peeled 18-Nov-20 11:57 PM 3 maybe 4 of my scopes have come from there 18-Nov-20 11:59 PM wow 19-Nov-20 12:01 AM If you want a fib I think there's one a psu available right now 19-Nov-20 12:01 AM I still need to figure out how to get into the Intel surplus warehouse 19-Nov-20 12:04 AM that would be amazing 19-Nov-20 12:04 AM I know people who have walked through it 19-Nov-20 12:07 AM Wait it's a physical place? 19-Nov-20 12:07 AM damn 19-Nov-20 12:08 AM Yeah right? 19-Nov-20 12:08 AM I figured you just meant that as a figure of speech 19-Nov-20 12:09 AM Oh no everything has to go somewhere 19-Nov-20 12:14 AM I've seen a thing or two with old intel property tags at reed 19-Nov-20 12:33 AM I've heard mystical tales from my boss about LLNL's old surplus yard that unfortunately got all tossed. 19-Nov-20 12:33 AM But heaven help you if a Tek 547 that's still in the records doesn't get found this sweep. 19-Nov-20 12:36 AM @funranium was speaking to this earlier 19-Nov-20 12:36 AM I emailed Berkely once because I got a 3D piezo stage with a tag on it, haha 19-Nov-20 12:36 AM They said it was cool, though. 19-Nov-20 12:36 AM Although this Quadra 800 still has it's hard drive and I can still get in it. Don't know if someone's sensitive research is in here or not. 19-Nov-20 12:36 AM I think it's early ultrafast magnets 19-Nov-20 01:25 AM barely has space to permanently set up an oscilloscope and still gets pointy ears whenever anyone mentions free SEM 19-Nov-20 01:27 AM same 19-Nov-20 01:27 AM Same 19-Nov-20 01:27 AM Do I have space, I mean only in my living room, do I have time, no ive got a goddamn thesis 19-Nov-20 01:28 AM lighten up your living room with a sem 19-Nov-20 01:29 AM Sounds like a pretty good living room 19-Nov-20 01:33 AM Eh, maybe one day 19-Nov-20 04:16 AM Found out about a stash of Pb bricks / plates I was allowed to steal from the lab clean out ... I carried a couple back to my other lab, with some advanced Australian swearing as I try and hold 20kg Pb in one hand while getting my RFID card out onto the door reader... then gave up. That’s enough spare Pb shielding for one day. 19-Nov-20 04:17 AM ohh pb 19-Nov-20 04:17 AM Didn’t have Geiger with me though... always not a bad idea for Pb bricks 19-Nov-20 04:18 AM if they're out in the open and can be taken by anyone they better not be contaminated / activated 19-Nov-20 06:25 AM so I found these babies 19-Nov-20 06:25 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/oBkxamrkGsbjvxXQyIKjJkfg-0CA21.png 19-Nov-20 06:25 AM hmmmm maybe I could take some time off working on the laser driver 19-Nov-20 06:25 AM and design something for this 19-Nov-20 06:55 AM As long as it wasn’t Chemistry Lead. PH3@R THE CHEMISTRY LEAD. 19-Nov-20 08:14 AM group 14 metals: okay the metals themselves don't scare me, but some of the compounds do, and the organometallics really scare me group 12 metals: okay the metal scares me, the compounds scare me, the organometallics are nope nope nope, and why do we have so much mercury in this lab??? 19-Nov-20 08:30 AM 0 days since last SEM purchase - I love it 19-Nov-20 08:30 AM and I wish! .. maybe in the future 19-Nov-20 08:31 AM There’s always all the mercury in the lab. 19-Nov-20 08:52 AM Always lol especially in electrochemistry. My undergrad advisor was an oldschool echemist, and so he was around for the days of big mercury pool electrodes, and so our metal storage cabinet reflected that lol 19-Nov-20 12:32 PM Meanwhile in Utah 19-Nov-20 12:32 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/codymercury-18A85.jpg 19-Nov-20 02:42 PM Whyyyyyyyyyyyy 19-Nov-20 03:46 PM phone returned (picked up by ups) 19-Nov-20 06:13 PM I think he wanted to see what it was like to float 19-Nov-20 07:22 PM There's all kinds of fun in the world. 19-Nov-20 07:23 PM Is that a Cody's lab video? 19-Nov-20 07:28 PM Yup 19-Nov-20 10:35 PM AFAIK there are multiple Intel surplus storage areas... They're a global corporation 19-Nov-20 10:35 PM As it is, I've contacted their surplus sales dept about instruments in the U.S. and Ireland, and maybe Asia (but I can't remember) 19-Nov-20 10:35 PM But they're all new high end sportscar price territory 19-Nov-20 11:46 PM @funranium what’s special or bad about chemistry lead? You mean like tetraethyllead and stuff, or lead bricks from a chemistry department? 20-Nov-20 01:08 AM Lead bricks 20-Nov-20 01:08 AM If they’ve been used as rad shielding before for messy stuff 20-Nov-20 10:04 AM I have a friend who (supposedly) has 5 million dollars worth of Palladium but can't do anything but keep it in storage because it's rad-hot. 20-Nov-20 10:29 AM You cannot just say that kind of thing and not give more information... 20-Nov-20 10:29 AM Guessing it has to be Pd-107 because the other isotopes have half lives in the days instead of years 20-Nov-20 10:29 AM Where did your friend even source that? Napkin math says that is about a literal ton of radioactive palladium 20-Nov-20 10:31 AM But 5 million of isotopically pure synthetic stuff is usually just a few grams 20-Nov-20 10:33 AM I was assuming it is a mix of the stable isotopes and Pd-107...but yeah i suppose if it was a pure sample of one isotope the price would be much higher for a pretty tiny amount vs $2325/lb 20-Nov-20 10:33 AM Seems like there would be a market for isotopically pure palladium such that you would have more options than keeping it in storage 20-Nov-20 10:35 AM also with a half life of 10^6 years it would hardly be active 20-Nov-20 10:35 AM I stand corrected, 19 MBq/g 20-Nov-20 10:36 AM Yeah just none of the other isotopes make sense do they? It would all decay down to stable stuff in a few months 20-Nov-20 10:37 AM but at a total decay energy of not even 30 keV self shielding would be very significant 20-Nov-20 10:37 AM shrug 20-Nov-20 10:37 AM I call bs 20-Nov-20 10:39 AM Yeah besides...where do you even get 1 ton (5m/2325=2150.5lbs) of radioactive palladium in the first place 20-Nov-20 10:47 AM For your reading pleasure. https://www.funraniumlabs.com/2020/11/choose-your-own-radiation-adventure-the-counting-experiment/ 20-Nov-20 10:54 AM Singapore, you wot m8 20-Nov-20 10:54 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/unknown-A9971.png 20-Nov-20 10:54 AM The civil rights campaigner, who has already served two brief stints in jail this year, will be charged under the Public Order Act, which regulates assemblies and processions in public places, according to the charge sheet Wham posted on Twitter. > He faces a fine of up to S$5,000 ($3,719). 20-Nov-20 10:54 AM When will thoughtcrime be a thing 20-Nov-20 10:54 AM 1984 was never meant to be an authoritarian playbook 20-Nov-20 10:58 AM It was a fun read, thanks for that 20-Nov-20 10:58 AM I'm still amazed I can't see any radiomedicine peaks in my lead 20-Nov-20 12:10 PM Radiopharma tends to be short-lived. Our desire to not load patient bodies, and their homes due to shed, with long lived isotopes these days leads to this happy result for you. 20-Nov-20 12:12 PM sure, but there has to be some contamination 20-Nov-20 12:12 PM Tc99 has a half life long enough 20-Nov-20 12:17 PM We don't administer Tc-99 to patients, we do Tc-99m for the gamma typically in a chemical form for easy flushing from their system. The Tc-99 beta is lower energy and the bremsstrahlung is likely to get lost in self-shielding. 20-Nov-20 12:25 PM right, Tc99 hasn't got any gammas to speak of, only 0.0006% emission probability 20-Nov-20 12:54 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/image0-A46AD.jpg 20-Nov-20 12:55 PM oarrr 20-Nov-20 12:56 PM Digital logic has found the answer: 1 20-Nov-20 12:56 PM Go home Hamlet, we're done here 20-Nov-20 01:22 PM https://www.laserfocusworld.com/test-measurement/research/article/16554859/focalplane-arrays-curved-sensor-array-to-help-simplify-cameras cool flexible silicon sheets lol 20-Nov-20 01:50 PM Wow, I just saw @funranium made Forbes in 2013.... 20-Nov-20 01:50 PM https://www.forbes.com/sites/karstenstrauss/2013/06/20/black-blood-of-the-earth-a-unique-coffee-experience-from-an-unusual-entrepreneur/?sh=f3f284c2d8f7 20-Nov-20 01:52 PM I had no idea he dealt in coffee and beer steins 20-Nov-20 01:54 PM I do stuff. 20-Nov-20 01:54 PM That’s how I first heard of him. 20-Nov-20 01:54 PM Then I met him in the Chernobyl Exclusion Zone. 20-Nov-20 01:54 PM I also go places. 20-Nov-20 01:55 PM I so want some of that coffee 20-Nov-20 01:55 PM I think his group was waiting to take a turn getting a photo at the sculpture in the parking lot in front of the Sarcophagus. 20-Nov-20 01:55 PM I had no idea it was the same person. 20-Nov-20 01:55 PM He was wearing some unusual naval jacket. 20-Nov-20 01:56 PM @GigaSquirrel addict? 20-Nov-20 01:56 PM Then I saw the photo of him in the same jacket in Chernobyl on his blog. 20-Nov-20 01:56 PM absolutely 20-Nov-20 01:57 PM ngl - I consume wayyy too much coffee 20-Nov-20 01:57 PM same 20-Nov-20 01:57 PM sometimes it interferes with sleep 20-Nov-20 01:57 PM sometimes <-- yeah right 20-Nov-20 01:57 PM I'm far beyond that, lack of coffee usually interferes with staying awake 20-Nov-20 01:58 PM Because I live in coastal CA, I had the grim realization as I was getting ready to go that my wardrobe doesn't have much middle ground between "flannel shirts fit for walking around in SF in July" and "Antarctic gear". My Union commodore's coat was the only thing I own that's about right for Ukraine in November. 20-Nov-20 01:59 PM I had colleagues play a prank on me once when I was an intern a few years ago; they changed the office coffee capsules to decaf 20-Nov-20 01:59 PM That’s evil, @SleepyOwl Joyce 20-Nov-20 01:59 PM I couldn't actually tell or realize lol 20-Nov-20 01:59 PM That is cruel and unacceptable behavior and I WILL NOT STAND FOR THAT. 20-Nov-20 01:59 PM Yeah, Chernobyl attire is not typical. 20-Nov-20 01:59 PM I discovered that BDUs actually are practical Zone clothing. 20-Nov-20 02:00 PM I know very quickly when I don't get my coffee 20-Nov-20 02:00 PM it was only after I sent this video, joking about decaf 20-Nov-20 02:00 PM https://www.youtube.com/watch?v=GJqaqsNg2T8 20-Nov-20 02:00 PM they told me about it 20-Nov-20 02:01 PM I originally thought it was just Call of Duty fanboys wanting to play soldier. 20-Nov-20 02:01 PM but I have to reset my sleeping cycle to getting up earlier anyways, so my last coffee was in todays lunch break 20-Nov-20 02:01 PM Have a good night everyone! 20-Nov-20 02:01 PM nini! 20-Nov-20 02:01 PM Well... even in the very hot summer, full length pants and shirts are mandatory. 20-Nov-20 02:01 PM starts her day sorta, meanwhile 20-Nov-20 02:02 PM And the military figured out how to make BDUs that can be used for jungle combat and keep soldiers from cooking. 20-Nov-20 02:02 PM And... all the pockets! 20-Nov-20 02:02 PM Great for the spare camera battery, headlamp, GoPro, spare GoPro battery, Geiger counter probe, etc. 20-Nov-20 02:02 PM Someone at PS:One was attempting to replicate BBotE. That’s how I first heard about Phil. 20-Nov-20 02:02 PM He called it Hacker Fuel. 20-Nov-20 02:08 PM I think I recall someone telling me about their attempts with that name. 20-Nov-20 02:10 PM https://wiki.pumpingstationone.org/Hacker_Fuel 20-Nov-20 02:10 PM They originally had problems with mold growth. 20-Nov-20 02:10 PM So they attempted pasteurization. 20-Nov-20 02:10 PM I tried one of the earlier batches. Someone then pointed out that everyone in the group who had partaken was talking at 3x normal speed. 20-Nov-20 02:23 PM https://www.reddit.com/r/chernobyl/comments/jxsdzt/a_sad_week_for_the_chernobyl_firefighters_ivan/?utm_source=share&utm_medium=ios_app&utm_name=iossmf 20-Nov-20 02:23 PM That’s sad.... surviving fighting the fire on the turbine hall roof, only to be killed by COVID.... 20-Nov-20 03:39 PM Via con Fritos, Ivan. 20-Nov-20 07:34 PM Not sure where he got it but I can ask. Not a ton, about 50kg. $2300/oz not lb :-) 20-Nov-20 07:34 PM My memory is hazy but i think it was part of some surplus liquidation. 20-Nov-20 07:34 PM The liquidation people obviously didn't know what it was, or that it was radioactive, and neither did my friend until he had the (un?)fortunate discovery. 20-Nov-20 07:34 PM I don't think it was a special isotope or anything but rather it was neutron activated in a past life. 20-Nov-20 08:35 PM That's what I get for trusting a quick google search on my phone about the price 20-Nov-20 09:05 PM I just noticed Tim Koeth has some gorgeous photos of Arecibo on his Facebook page. Even if you don’t share Tim’s love of a good klystron (pfft of course you do) the outside photos of the dish are phenomenal 21-Nov-20 11:57 AM Mmmm klystron pr0n.... I have pics somewhere of me and the Fermilab linac. Also me at the Spallation Neutron Source back when I visited Oak Ridge. 21-Nov-20 11:57 AM And.... 21-Nov-20 11:57 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/image0-BDD36.png 21-Nov-20 11:58 AM haha nice 21-Nov-20 12:12 PM @DeltaMed910 remind you of something? 21-Nov-20 12:13 PM That's pretty great 21-Nov-20 12:14 PM lovin' that Gaussian pillbox 21-Nov-20 12:14 PM Not what I was going for lol 21-Nov-20 12:14 PM For context for everyone else, the staff at work all got shirts a couple years back with “what the flux” as part of the design 21-Nov-20 12:29 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/image0-46D43.png 21-Nov-20 02:32 PM so a few days ago I saw this 21-Nov-20 02:32 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/PsMBsjjvQsjEeXvcWALbZHze-E3328.png 21-Nov-20 02:32 PM so an update: 21-Nov-20 02:32 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/vDuuFrffwcbGyHhIsEzDclgW-C9895.png 21-Nov-20 02:32 PM "debate" 21-Nov-20 02:32 PM Unfortunately we all know how this will just end up 21-Nov-20 02:32 PM this makes my blood boil though 21-Nov-20 02:32 PM we honestly don't need this crap more than ever 21-Nov-20 02:54 PM This leaves me feeling conflicted because I strongly suspect that this person is not experiencing the same reality as the rest of us but also "climate alarmists" are actually a thing... :/ 21-Nov-20 02:54 PM Is it bad to hope that this person is not the complete crazy climate change denialist type even if I know they almost certainly are? 21-Nov-20 03:07 PM yes if it changes how you act 21-Nov-20 03:40 PM @LRM I mean 21-Nov-20 03:40 PM the guy is wearing an "I ❤️ fossil fuels" shirt lol 21-Nov-20 03:40 PM Oof 21-Nov-20 05:12 PM I love them too but probably in a different way than that guy haha I could never travel anywhere without them. 21-Nov-20 05:12 PM I just live in a state (California) where environmentalism has been taken to it's extremes so I am less willing to forgive "climate alarmist" sort of behaviors 21-Nov-20 05:14 PM It’s bad enough that we have to deal with “100% wind power can do it” and “ban all nuclear power” rubbish without having to deal with this denial rubbish as well. 21-Nov-20 05:15 PM IMO those are both different sides of the same coin...or alternately the extreme ends of the pendulum swing 21-Nov-20 05:16 PM But at the same time we can acknowledge that fossil fuels have indeed powered a lot of human development. A lot of poverty eliminated, a lot of improvement in quality of life. And developing countries should be given priority with the remaining safe CO2 budget if there is any, they will choose development over decarbonisation and so they should. 21-Nov-20 05:16 PM But we need to get off the CO2 emission, rapidly. 21-Nov-20 05:16 PM And we know how to win this. We know how to solve this. It does not require any new invention or discovery. 21-Nov-20 05:16 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/image0-BCAF3.png 21-Nov-20 05:16 PM That’s Ontario right now. Fossil fuels almost entirely put out of business. Replicate it for all the world. Roll it out right now. 21-Nov-20 05:28 PM You can't just build nuclear power plants "right now" unfortunately 21-Nov-20 05:28 PM Especially in the developed world 21-Nov-20 05:28 PM This is also an economic and political problem. When natural gas is so cheap right now, simply nothing can compete. 21-Nov-20 05:28 PM Almost all new Gen-4 AP-1000 nuclear plant in the US are destined to be completely not profitable over their entire lifetime, because there were so many delays, so many cost over-runs during construction, in part due to those environmental extremists, but the root cause is poor project management and bureaucracy 21-Nov-20 05:28 PM But then even when you talk to sensible people, there are many reasonable questions that we have technological answers for, but no political capital to do it. For example, how are we dealing with the high level waste piling up at reactors that's not going to Yucca Mountain? How do you speed up licensing of new SMR or even microreactor tech? 21-Nov-20 05:28 PM It's kinda fascinating to look at the resurgent interest in molten salt reactors lately, especially ones with thorium fuel cycles and passive safety features. That was tech from 40+ years ago, designed, built and tested with electricity to the grid (EBR II at Argonne), but Bill Clinton came along and it was completely abandoned 21-Nov-20 05:28 PM (With higher cost in decommissioning of the incomplete plant than it would have taken to finish the plant and operate it) 21-Nov-20 05:28 PM Building reactors is an endeavor that takes a decade at least to plan and execute, there can't be hesitation in the chain of management or else delays and costs compounds 21-Nov-20 05:28 PM When utilities look at the natural gas prices in the short term, they're encouraged to put these long term projects on hold, and ends up incurring much greater cost and debts on themselves for not finishing what they started 21-Nov-20 05:43 PM Long term vs short term is definitely a big part of the fossil fuel problem. 21-Nov-20 05:43 PM Lobbying to deny there even is a problem though? 21-Nov-20 05:43 PM It’s cigarettes again 21-Nov-20 05:45 PM That's a different problem, I used to think those were just extremists like the ecomentalists, but I've been proven wrong many times in the last 4 years 21-Nov-20 05:46 PM I think a lot of continually pro-oil people think each big project “we’ll use this to fund a transition” 21-Nov-20 05:46 PM Like if viewed as “it’s 2020. We have this project planned, and under construction. Are you saying we should stop it?” 21-Nov-20 05:46 PM Then a lot can be swept away as “necessary evils” 21-Nov-20 05:46 PM But for people who’ve been lobbying against those projects for like five decades now, I’m sure that gets tiring. 21-Nov-20 05:55 PM "Simple" steps to take to make nuclear practical (in the US) 1. Finish the plant design before you start building it 2. Stop contracting everything out to people. Concentrate on building a centralized supply chain, with companies specializing in mass production of the same product, and ONE company do the central overseeing and core assembly on site 3. Reduce NRC bureaucracy on approved modern designs, and be more efficient in this process for every plant that is to be built (i.e. same person oversees the same process during approval, for all plants of the same type) 4. Gather some national level initiative. Yucca Mountain is built, use it. Waste transmutation technology has been here for decades, use it. MOX manufacturing plants are already 80% built, don't cancel them because there is no short-term economic incentives. When there is no reasonable evidence to support "not-in-my-backyard" type of opposition, the right thing to do is to explain to them why they're wrong, not to shut everything down 5. Give private nuclear start-ups better access to national labs and in some cases military reactor designs. The knowledge and experience that's already there is enormous and can produce big jumps in the technological readiness levels of advanced designs greatly if the public and private sectors work together 21-Nov-20 06:13 PM While I'm not exactly thrilled with the current state of NRC with respect to reactor development, siting, and licensure no one's really really beating down their door either. The incentives for construction haven't been there. As for Yucca, it's built but also unusable. From a certain point of view, it's very fortunate that we found the flaws before we loaded anything in. Also there were some incomplete support infrastructure issues so it wasn't DONE done. The metaphorical equivalent of you built your computer but forgot the power cable. 21-Nov-20 06:21 PM Unusable in what sense? That we might be worried the background radiation level might raise by 1% in 10000 years? That's some extreme long term thinking curiously absent from the nuclear industry at large, despite the extreme short-term cost of not doing it. The most costly part of this is the same thing for reactor constructions, you take two steps forward and two steps back. Standing still while spending billions per year We have the technology for accelerator driven waste transmutation, we have built and tested breeder reactors that use metal fuels which can be reprocessed from waste, yielding much shorter half-lives after that. MOX is a thing. Why are we so sure that this repository will be there for millions of years and continue to hesitate? 21-Nov-20 06:33 PM I would rather the fuel from San Onofre be deep in a mountain, flawed as it may be, rather than encased in concrete on a coastal bluff 21-Nov-20 06:34 PM Unusable in the sense of, oops, not quite as geologically quiet as we thought. 21-Nov-20 06:34 PM So what? 21-Nov-20 06:34 PM The level of risk and the potential impact is so, so low that it scarcely matters 21-Nov-20 06:35 PM The local tribes and USGS very much disagree with you. 21-Nov-20 06:35 PM 1% in 10000 years is being very generous already, it's a great challenge even to measure that 21-Nov-20 06:36 PM While building it we found faults and ground water intrusion that we hadn't previously identified. It was a significant and compromising flaw. 21-Nov-20 06:36 PM 15 millirems per year maximum in 10000 years is the EPA's estimate. Background dose rate is >620 millirems per year 21-Nov-20 06:36 PM And that's in the local area 21-Nov-20 06:36 PM Now how much does your average coal plant produce to their local environment? How does that compare to Yucca in 10000 years? 21-Nov-20 06:36 PM And how many lives can those billions spent doing nothing save? 21-Nov-20 06:38 PM Since you probably have forgotten more about this than I will know, what are the main barriers to getting reprocessing established in the USA? Cultural, legal, or lack of will? 21-Nov-20 06:38 PM As a health physicist and former DOE employee, suffice to say we found it to be irreparable. 21-Nov-20 06:38 PM Reprocessing denial is a Carter Admin choice. 21-Nov-20 06:38 PM It is also part of our non-proliferation treaties. 21-Nov-20 06:40 PM The groundwater issues at Yucca seemed solvable when I looked into it last but the whole political climate surrounding it is just almost as toxic as what it was supposed to contain 21-Nov-20 06:40 PM Abandoning the Savannah River MOX manufacturing site sure speaks a great deal to the US's commitment to treaties 21-Nov-20 06:40 PM Abandoning the MOX facility was a deep grumble. 21-Nov-20 06:41 PM I simply don't understand why reasonable people are just so afraid of something of such low risk level, so far away in the future 21-Nov-20 06:41 PM Especially we have alternative technology to address this, so the site might be rendered empty in 100 or 200 years, not because of ground water, but because we need more fuel 21-Nov-20 06:43 PM Building YMP without involving the local tribes who's land you need to pass through means you screwed up deeply, again. The NV locals in Las Vegas are much less of a problem by comparison. 21-Nov-20 06:44 PM Also the part where the mountain is sacred to one or more of them. 21-Nov-20 06:44 PM DOE shot themselves in the foot very thoroughly in multiple different directions with Yucca. 21-Nov-20 06:44 PM It isn't usable on a technical basis or political one. 21-Nov-20 06:46 PM This still doesn't make any sense technology wise 21-Nov-20 06:46 PM Nor will I be explaining it. Sorry. 21-Nov-20 06:46 PM To me at least, we can agree to disagree 21-Nov-20 06:47 PM It was a weird choice to go for Yucca Mountain to begin with imo... The Chocolate Mountains have all the remoteness and none of the political baggage. Similar geology too if I am remembering right but they would be more seismically active I suppose 21-Nov-20 06:47 PM Just the government already owns vast swaths of them and controls all access 21-Nov-20 06:49 PM Any purpose built repositories would be better than concrete canisters on site imo 21-Nov-20 06:49 PM In terms of proliferation risk, economic impact (short and long term), potential unintended release due to some disaster, or political motivation 21-Nov-20 06:56 PM and yet every pipeline in canada seems to go straight through a bunch of patches of FN territory -_- 21-Nov-20 06:58 PM And the DOE seems to be selectively deaf to the Navajo Nation affected by the worst radioactive waste spill in US history 21-Nov-20 06:58 PM https://www.vox.com/21514587/navajo-nation-new-mexico-radioactive-uranium-spill 21-Nov-20 06:59 PM This hasn't made a lot of friends. 21-Nov-20 06:59 PM Not entirely deaf these days, but there's also the lessons learned of "That was crime against humanity bad. Let's try not to do that again." 21-Nov-20 07:02 PM On the bright side, maybe high B high beta Tokamaks will be just in time to save the day! 21-Nov-20 07:03 PM I'm sure the benevolent dyson sphere company will distribute our sun equally and fairly 21-Nov-20 07:04 PM During talks at the APS-DPP meeting and a separate one at the ANS Winter Conference, there were many physicists who just casually threw numbers like "heat loads of 13 MW/m^2", ">20 dpa on first wall and breeder blanket"...etc. Sounds like we really need more engineers on the problem at this point 21-Nov-20 07:13 PM I'd like to actually have some ecologists on the committees too 21-Nov-20 07:28 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/20201121_192119-399CE.jpg 21-Nov-20 07:28 PM 6 alarm fire at University and Shattuck in Berkeley 21-Nov-20 07:28 PM There's an excellent vice documentary about Slab City tweakers who collect ordinance scrap from the chocolate mountains. 21-Nov-20 09:05 PM Yeah over the years I have been out to that area a number of times, both north and south of the Chocolate Mountains Aerial Gunnery Range, and met all kinds of interesting people... 21-Nov-20 09:05 PM Once "Salvation Mountain" got to be a thing with the instagram/social media kind of people the whole vibe really changed out near Slab City 21-Nov-20 09:39 PM Does anyone know the pinout or what is in this module? 21-Nov-20 09:39 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/20201122_063302-C3CD5.jpg 21-Nov-20 09:39 PM Is it even PMT based? 21-Nov-20 10:22 PM It’s not about what’s “profitable”, it should be about what does the job of providing energy for society in an environmentally safe way. Yes, fossil fuels are “cheaper” but not acceptable. Many countries in the world do perfectly well with state-owned energy generation, including projects like TVA that were not created with the goal of maximising corporate profit. If we asked people a year ago, how long does it take to do the research and development, production, safety data, clinical trials, regulation and scale-up for a novel vaccine, they would tell you 10 years. But it turns out we can get stuff done an order of magnitude faster, we just have to choose to. 21-Nov-20 10:22 PM Ooh it says NaI(Tl) on it, probably a thin crystal since it has a Be window. 21-Nov-20 10:22 PM Probably small Lemo is signal and big Lemo is HV 21-Nov-20 10:27 PM Yeah i know that there is a scintilator in it but i'm not quite sure what elese is in there, it's glued together 21-Nov-20 10:39 PM I hate these sorts of devices recycled from instruments because you know they’re so good but you can’t actually use them without pinout data 21-Nov-20 10:39 PM Try identifying the model of the machine it goes with (X-ray diffractometer probably) and see if you can get a service manual for that instrument. 21-Nov-20 10:41 PM That detector probably has a preamp in it, in which case the two pin connector is likely power, maybe it's 12V 21-Nov-20 10:41 PM Check all the pins for continuity to the case ground, that will narrow it down. 21-Nov-20 10:43 PM In case you can't find the pinout, once you figure out the preamp voltage (might be 5V for new stuff like this, but I'd say unlikely) and determine HV polarity, you can increase HV voltage until you start to see pulses coming out on the other connector 21-Nov-20 10:56 PM Wow this is kinda crazy...have a police helicopter flying over at 11pm with their loudspeaker saying they're looking for a missing 84y/o woman 21-Nov-20 10:56 PM Never had that happen before 21-Nov-20 10:56 PM Also on topic, did you try contacting Brucker? 21-Nov-20 10:57 PM what in the name of? 21-Nov-20 11:20 PM Bruker won't give any information 21-Nov-20 11:20 PM I worked a lot with instruments from them, but since then i hate them. 22-Nov-20 12:47 AM Used nuclear fuel doesn’t pose a proliferation risk. Some McVeigh types can’t come along and steal the fuel and make a bomb from it. How are they going to steal it? How are they going to transport it? Dry casks are heavy, getting them onto the truck is not trivial. And they can’t make a bomb with it. And there’s so little of this used fuel, it takes up really very little space. Take it from the plant operators and store it on outdoor open pads like it is now at the plant sites, store it at NNSC or Hanford or INL or whatever, there is plenty of spare space owned by DOE. That fulfills the Nuclear Waste Policy Act obligations. And “no recycling” is just a stupid long term strategy IMO. The US already has more weapons-grade Pu then it knows what to do with, there’s already a surplus of it and it isn’t getting MOXd as agreed, so why would you even bother with a selective Pu extraction step such as PUREX when recycling it? It’s not even weapons grade Pu, but we’ll leave U / Am / Np mixed in there to make really, really proliferation-free if it makes people feel better. 22-Nov-20 12:47 AM *NNSS 22-Nov-20 12:47 AM And it will be far easier to validate a geological repository for a much smaller amount of stuff over a much shorter time period. 22-Nov-20 12:47 AM We can’t have an unliveable climate in 100 years because we’re stuck arguing about 100,000-year corrosion processes at Yucca 22-Nov-20 12:47 AM I want our descendents to have hard, challenging problems to solve in 100,000 years from now. I really hope they are here and on a plurality of worlds dealing with hard problems. 22-Nov-20 12:52 AM isn't there also research dealing with recycling spent fuel and all? 22-Nov-20 12:52 AM Honestly I think with regards to nuclear power, public perception is one of the biggest factors in their use and implementation 22-Nov-20 12:52 AM People are concerned about nuclear power, and perhaps rightfully so with the events at Fukushima, Chernobyl, Three Mile Island, etc 22-Nov-20 12:52 AM I just am not sure that completely avoiding nuclear power is the way about it 22-Nov-20 08:32 AM Iirc thorium breeders could use the "spent" fuel 22-Nov-20 12:43 PM Oh hey I was at the ANS Winter Conference 22-Nov-20 12:43 PM Did you attend the US High Performance Research Reactor conversion plans session? Some of my work was presented with the NIST folks then. 22-Nov-20 12:45 PM No, I was spending most of my time at TOFE 22-Nov-20 12:45 PM Ohp 22-Nov-20 12:45 PM But since all of it is recorded, I'll be watching most of the sessions in the main conference too! 22-Nov-20 12:45 PM Been having them play in the background last couple of days 22-Nov-20 12:46 PM Wait it was recorded? 22-Nov-20 12:46 PM Yep, access the Zoom recordings through the links to each technical session, you can download all of it too if you want 22-Nov-20 12:47 PM Huh I didn't notice that 22-Nov-20 12:47 PM Takes 24 hours for recordings to be uploaded. They won't be up forever though 22-Nov-20 12:47 PM What is the opinion in the research reactor community on fast breeders? Ones that use metal fuel? 22-Nov-20 12:50 PM I can't speak on behalf of the whole community, as I'm still a student working with your plain jane reactors 22-Nov-20 12:51 PM Ah I was very unlucky to have my school's reactor shut down before I get to take the reactor lab class... 22-Nov-20 12:51 PM However, my takeaway is that the US should maintain neutronics superiority over other countries, and I did get to learn more about the Chinese breeder reactor fleet 22-Nov-20 12:51 PM So if the Chinese are doing it... We better up our game too. 22-Nov-20 12:51 PM Mind if I ask which school that is? 22-Nov-20 12:51 PM Virginia? 22-Nov-20 12:52 PM I believe the obstacle continues to be pyroprocessing 22-Nov-20 12:52 PM No, RPI in upstate New York. The reactor was only operating around 50 W thermal though (licensed up to 300+ W I think) and no where near the TRIGA that you guys have 22-Nov-20 12:53 PM Ohp RPI, right? I didn't know their reactor shut down? 22-Nov-20 12:53 PM Yeah sorry I remembered now 22-Nov-20 12:53 PM Huh so the 5 W facility is still up? 22-Nov-20 12:53 PM It's not officially shut down, but it will be soon. Shut down because there's not too much research on it and because the casino across the river from it doesn't like it being there 22-Nov-20 12:53 PM If people wanted to do research with reactors, they go to KAPL nearby 22-Nov-20 12:55 PM Huh, I thought KAPL was for the Navy 22-Nov-20 12:55 PM And the Navy need researchers to work on their reactors 22-Nov-20 12:57 PM That's p cool 23-Nov-20 09:04 AM Nuclear power is not the panacea that pro nuclear activists seem to think it is. 23-Nov-20 09:04 AM The problem is with the nature of electricity. 23-Nov-20 09:04 AM It can’t be stored efficiently. 23-Nov-20 09:04 AM So power grids must exactly match generation and consumption, or Bad Things Happen(TM). 23-Nov-20 09:04 AM Nuclear is great, but there’s a nagging problem. 23-Nov-20 09:04 AM Thanks to the xenon well, you can’t shut down a reactor at night and start it up again in the morning. 23-Nov-20 09:04 AM And electrical daily demand is highly cyclical. 23-Nov-20 09:07 AM Unfortunately I must agree, storage and distribution of electricity is an issue 23-Nov-20 09:07 AM it gets expensive to store electricity 23-Nov-20 09:08 AM So a weird situation can happen where the wholesale cost of electricity goes NEGATIVE at night. 23-Nov-20 09:08 AM Nuke plants have to pay to put power on the grid. 23-Nov-20 09:08 AM so in some places you get charged for having solar panels on the grid (that also for some reason, you're required to put it on the grid) 23-Nov-20 09:08 AM although electricity generation is one thing 23-Nov-20 09:08 AM there are other sources of greenhouse gases and all that we can't exactly deal with yet 23-Nov-20 09:08 AM food production, farming, transportation (especially aviation), etc 23-Nov-20 09:09 AM They are faced with bad economics. If they shut down, they’ll be down for days or weeks, so they just suck it up and deal. This is part of why nuke power isn’t economical. 23-Nov-20 09:09 AM Gas, coal, and oil all shut down, and nuke plants, during the night, are left up, oversupplying the grid, and wholesale customers are being paid to consume it. That’s not a good situation. 23-Nov-20 09:11 AM yeah :/ 23-Nov-20 09:12 AM Nuke is perfect for base load, but it can’t address peaks and daily demand. 23-Nov-20 09:12 AM you're going to have to supplement it with other sources of energy 23-Nov-20 09:12 AM I don't see a future totally nuke powered, but a mix of various sources of energy 23-Nov-20 09:13 AM Well, unless we decide to use HEU in power reactors like nuke subs, so they can start and stop on a dime. But that’s a proliferation treaty non-starter. 23-Nov-20 09:13 AM For nuclear to become more efficient, we need better ways to store energy and shift energy usage to nighttime. 23-Nov-20 09:15 AM Hey, if everyone, even small banana republics have nukes... then no one will dare use them out of M.A.D, right? /s 23-Nov-20 09:15 AM Like buildings that freeze salt water at night, using it for HVAC during the day. 23-Nov-20 09:15 AM Carter was an idiot re: no reprocessing. 23-Nov-20 09:15 AM Every major industrialized nation reprocesses. 23-Nov-20 09:15 AM Even if U is abundant, it greatly reduces the quantity of waste that needs to go into long term geologic storage. 23-Nov-20 09:17 AM yeah - I was wondering why there isn't much talk about spent fuel reprocessing, etc 23-Nov-20 09:17 AM I know that there are projects and labs doing that 23-Nov-20 09:17 AM just that you don't hear about it in the public eye 23-Nov-20 09:18 AM It’s a third rail in the US 23-Nov-20 09:18 AM third rail? 23-Nov-20 09:19 AM Political term. 23-Nov-20 09:19 AM The third rail on the subway carries high voltage electricity. You step on it, you fry. 23-Nov-20 09:19 AM right I get it now 23-Nov-20 09:19 AM it's silly though 23-Nov-20 09:21 AM Apparently even reactor grade Pu is considered potentially explosive by a terrorist. 23-Nov-20 09:21 AM A Gadget type device would certainly pre-detonate. It won’t make a 20 kt yield. But a 500 ton fizzle inside a truck in the middle of a metro area is still going to suck. 23-Nov-20 09:21 AM So the argument “it’s reactor grade Pu, it’s not a proliferation risk” isn’t that strong. 23-Nov-20 09:21 AM Also, the US is trying to pressure other countries not to recycle in exchange for US fuel and technology. The agreement with UAE is viewed as the gold standard for non-proliferation. It prohibits UAE from reprocessing. 23-Nov-20 09:21 AM The trouble is that reprocessing is a dual use technology. Sure, reprocessing spent commercial nuclear fuel yields reactor grade Pu which isn’t very good as a nuclear explosive, but such a country is now a threshold nuclear weapons state. All they have to do is kick out the IAEA, start short cycling fuel through their reactors, and the reprocessing plants are now outputting bomb grade Pu. 23-Nov-20 09:32 AM I see 23-Nov-20 09:33 AM That’s why we’re so concerned with Iran and U enrichment. The NPT pretty much allows countries to become threshold nuclear weapons states. 23-Nov-20 09:33 AM Saudi Arabia is in the same spot. They really want to be a threshold state so that if Iran races for the bomb, they can too. 23-Nov-20 09:33 AM The same centrifuges can be rearranged in different cascades to produce bomb grade U-235. 23-Nov-20 09:33 AM It’s recognized that Japan effectively is a threshold nuclear weapons state. If there was the political will for a breakout, it could happen. 23-Nov-20 09:33 AM Well.... maybe not if they go through with killing their entire nuclear power industry. 23-Nov-20 09:33 AM Typically, though, commercial power reactors are not the best choices for Pu production. They can be used, but it typically compromises commercial efficiency. 23-Nov-20 09:33 AM I’ve had a number of discussions about whether RBMK’s were used for Pu weapons production. The answer I’m hearing is no, it’s unlikely. They could certainly be used for that purpose, but Minsredmash already had enough dedicated Pu production reactors with onsite reprocessing at Mayak. They didn’t need Minenergo producing more weapons grade Pu. How would you transport hot spent fuel in bulk to the reprocessing facility? 23-Nov-20 09:33 AM The RBMK was designed at the Kurchatov Institute based on the same graphite / water tech used in Pu production reactors, but that was likely because it was a known working design that would be easier to scale up, not because they were eyeing it for Pu production. 23-Nov-20 09:47 AM I see 23-Nov-20 09:59 AM I love water batteries though 23-Nov-20 09:59 AM they're the most fun way to store electricity 23-Nov-20 10:28 AM @rdpierce We still need lots of baseload power though and GW scale nuclear power plants are by far the most environmentally friendly way to provide that. There is always going to be a mix of electricity production sources, and it's not like there is no solution to deal with ramping power/storing energy either. This is part of why SMRs are attractive, and companies like TerraPower are proposing technologies like thermal storage on site: https://www.terrapower.com/exploring-the-natrium-energy-storage-system/ 23-Nov-20 10:31 AM how about we just let facebook build a dyson sphere and trust they'll be equitable in how they share energy? 23-Nov-20 10:38 AM Also, the French EPR reactors (nothing fancy on the neutronics side, it's a PWR) has great load following capabilities 23-Nov-20 10:38 AM https://www.oecd-nea.org/ndd/reports/2011/load-following-npp.pdf 23-Nov-20 10:38 AM It's true that huge nuclear plants are not best way to follow day-night load variations in the grid, and fossil/hydro will always be better at this. But it is certainly doable even if the majority of the grid is powered by nuclear. Although reactors ramp slowly, it is at least controllable and can be designed to match your requirements(and thus gives way to advanced grid forecast techniques), unlike wind/solar 23-Nov-20 10:49 AM Hydro is a really weird one 23-Nov-20 10:49 AM HUGE environmental impact, heavily localized. 23-Nov-20 10:50 AM And some would argue even more risky than nuclear in many instances 23-Nov-20 10:50 AM A big enough bomb or a few missiles/rockets into the Three Gorges Dam, you might be looking at millions in casualties 23-Nov-20 10:55 AM The recent flooding almost did it without any help 23-Nov-20 11:05 AM TIL about this https://en.wikipedia.org/wiki/1975_Banqiao_Dam_failure 23-Nov-20 11:05 AM That wasn't a particularly big river or a big dam, but best estimate puts 100000+ in deaths. I'm not sure I'd trust megaproject infrastructures like this to last hundreds or thousands of years. It's not clear how you would repair dams and a lapse in infrastructure maintenance is much more of a common occurrence than lapse in monitoring of nuclear facilities 23-Nov-20 11:10 AM "To protect other dams from failure, several flood diversion areas were evacuated and inundated, and several dams were deliberately destroyed by air strikes to release water in desired directions. " 23-Nov-20 11:10 AM wow 23-Nov-20 11:10 AM That sort of coverup really leaves you wondering what the actual situation at Three Gorges Dam was during the recent flooding 23-Nov-20 11:12 AM This is a fairly unique period in history and the disaster is probably more man-made than natural, but it illustrate the consequences 23-Nov-20 11:12 AM Saw some photos that seemed to show spillway erosion and then did not hear anything more about that 23-Nov-20 11:12 AM The current Chinese gov position seems to be that any concerns about the dam were "western rumors" 23-Nov-20 11:27 AM Curiously, this failure alone puts hydro at the top of all energy sources in terms of cost of life due to directly related disasters, even if you trust the most ridiculously big excess death numbers for Chernobyl 23-Nov-20 11:27 AM And yet I bet 99.9%+ of Chinese people don't know about it, guess they did an absolutely fantastic job in cover-up and brainwashing 23-Nov-20 11:27 AM But of course coal and oil is on a completely different level in terms of indirect deaths 23-Nov-20 12:12 PM Just burn up the excess nuke electricity with a big resistor 23-Nov-20 02:56 PM I inched some progress on this vintage keyboard thing.. able to detect if data is ready (key press), and I can toggle a few things, but havent ready any data out just yet (nor given it any, LED states) 23-Nov-20 03:08 PM actually, I kind of am getting data out, neat 23-Nov-20 03:08 PM oh, and it even lines up with relatively standard ascii hex 23-Nov-20 03:08 PM some keys dont seem to be working though, will need to investigate 23-Nov-20 03:08 PM hahaha.. the 'E' doosnt seem to work, which is why I even got the keyboard in the first place is because the one I am typing on now had a problem (I swaped out the switch last weekend) 23-Nov-20 04:07 PM I was not expecting the keyboard to work as it is due to one main chip, the shift register which stores the current buffered keycode.. datasheet talks about an output enable which stays high unless a 1.2ms pulse comes along during the interrupt routine.. but that output control is only on the main I/O, not the sequential/shifted output... suuuper stupid 23-Nov-20 04:07 PM so I was hyped on trying to time things, but no need, just send a "Y0" to cehck data, if data then send "Y2" and read the data, simple.. now to really figure out Y1 and Y3 (LED status update and maybe something else) 23-Nov-20 07:20 PM @nmz787 did you know intel made mp3 players? 23-Nov-20 07:20 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/51CM73QX00L-41356.png 23-Nov-20 07:51 PM https://twitter.com/BenKrasnow/status/1331034253463699456 23-Nov-20 07:51 PM What a fun comment about beryllium 23-Nov-20 07:54 PM The replies too 23-Nov-20 08:02 PM Yeah :/ 23-Nov-20 08:06 PM Why do I feel like a good chunk of “beryllium Twitter” in this server 23-Nov-20 08:06 PM And now I have some very fun ideas involving demos for the reactor training program with a beryllium piece and an alpha source... 23-Nov-20 08:28 PM Hmm, not but it doesn't surprise me. They also made beloved microscopes and then pulled the plug. 23-Nov-20 09:31 PM I feel subtweeted, but it is accurate. 23-Nov-20 10:10 PM https://twitter.com/AlanSwithenbank/status/1331068532017094661 23-Nov-20 10:10 PM I hope that is not actually accurate but based on some people I know in the machining industry it is completely believable 23-Nov-20 10:10 PM Who wants to bet the Be coffee cup is totally unlabeled as to what metal it is made from 23-Nov-20 10:10 PM https://youtu.be/sOGwreJQvtk?t=1395 23-Nov-20 10:10 PM The "math" on the pumpdown for the hyperloop is...interesting? 23-Nov-20 10:10 PM Sometimes that guy has amusing takes on things...sometimes he is the amusing thing 23-Nov-20 10:18 PM Very much so 23-Nov-20 10:19 PM From the people of a previous generation at SLAC that is extremely believable. 23-Nov-20 10:27 PM why's he looking at 15m^3/hour pumps? 23-Nov-20 10:27 PM That is what I would like to know 23-Nov-20 10:27 PM Then he bases all of his stuff off of that...which is pretty ridiculous 23-Nov-20 10:27 PM Almost as ridiculous as the whole hyperloop premise 23-Nov-20 10:28 PM I've got a 600m^3/hour pump, it's barely bigger than an eATX computer case 24-Nov-20 12:35 AM @idmb roots blower? 24-Nov-20 12:36 AM those are usually pretty big 24-Nov-20 12:36 AM this is a "dry screw" 24-Nov-20 12:36 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/a37869ae-0ba6-4fb5-bacd-ead3fd2d4576-02ED1.png 24-Nov-20 12:36 AM they spin really fast and use a lot of water cooling, I gather. 24-Nov-20 01:32 AM What model 24-Nov-20 08:15 AM iGX600L 24-Nov-20 08:15 AM More berilium and uranium machining fun times https://www.instagram.com/p/CH-pyv7At1k/?igshid=tqn2vnm2zgvi 24-Nov-20 08:15 AM "Although some people working with beryllium do not appear to be susceptible to its dust, there are those who develop symptoms somewhat akin to silicosis" 24-Nov-20 09:34 AM Things that can kill you faster than beryllium: 24-Nov-20 09:42 AM Oh yeah control lock will hold it no problem 24-Nov-20 09:44 AM should I be worried? 24-Nov-20 09:44 AM I think I am 24-Nov-20 11:13 AM I have a dumbass who out did that one 24-Nov-20 11:13 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/20200704_232406-47A72.jpg 24-Nov-20 11:29 AM What is that??? 24-Nov-20 11:45 AM Wtf? 24-Nov-20 11:50 AM Uhhhhh 24-Nov-20 01:01 PM Bbq? 24-Nov-20 01:39 PM I was thinking that too 24-Nov-20 01:39 PM also, just gained full control over the terminal keyboard's LEDs 24-Nov-20 01:39 PM I just have to crack the actual scancode routine a bit more (but I am getting perfect ascii output).. and also diagnoze why the shifting isnt working (shif tlock does) and a few other keys that are not reporting any output 24-Nov-20 01:39 PM that project took a month or so, heh 24-Nov-20 02:29 PM A barrel full of flaming wood on a pallet that's also on fire 24-Nov-20 02:30 PM Is this a metaphor for 2020? Why????? 24-Nov-20 02:32 PM So it falls and rains embers of course... I also have a video of dumbass pointing a leaf blower at it so it burns faster but it's too big for discord. 24-Nov-20 04:29 PM Streamable 24-Nov-20 06:20 PM Well I have an objective coming DHL from China. Lets see how they do this time. 24-Nov-20 07:28 PM Lol what warehouse is this that fusion uses for reflections? 24-Nov-20 07:28 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/unknown-9BF62.png 24-Nov-20 07:54 PM Are you using a professional license of fusion? 24-Nov-20 07:56 PM Educational license gives me 5 years with everything included (even when I'm not really a student now) 24-Nov-20 07:56 PM All you need is a .edu email address, which I think you should have @rdpierce ? 24-Nov-20 07:59 PM Yeah I broke down 24-Nov-20 07:59 PM I can't get anything else that can do what I need for close to the price 24-Nov-20 07:59 PM Especially 5 axis cam 24-Nov-20 07:59 PM Or 3 axis with tool changes and more advanced M and G codes 24-Nov-20 08:00 PM I’m salty that they nerfed the hobbyist license. 24-Nov-20 08:01 PM I am to 24-Nov-20 08:01 PM ...but not enough to go buy something else that costs a few k 24-Nov-20 08:01 PM Yeah.... I have an .edu email address but I’ve not got around to trying to port the license over. 24-Nov-20 08:01 PM The other issue is I’m working in the context of a makerspace. 24-Nov-20 08:02 PM Here's the thing, you can use a regular gmail address 24-Nov-20 08:02 PM But you email their support with your .edu address 24-Nov-20 08:02 PM I mean I do use it for work so 24-Nov-20 08:03 PM We need solutions for our CNC tools that all members can access, not just people like me currently in university. 24-Nov-20 08:03 PM I don't use it for work, so I don't feel so bad 24-Nov-20 08:03 PM That is good to know @Mason_Yu 24-Nov-20 08:03 PM Yeah they really made that kinda suck 24-Nov-20 08:03 PM I don’t use it for work either. 24-Nov-20 08:04 PM Solidworks professional is very nice though, for complex assemblies 24-Nov-20 08:04 PM Im designing hardware that has to fit in 1U right now and ugh its such a PITA 24-Nov-20 08:04 PM You really shouldn’t. It’s a non-commercial license. 24-Nov-20 08:04 PM Extreme prices though 24-Nov-20 08:04 PM We have access to the educational version of Solidworks. That includes CAM. 24-Nov-20 08:04 PM Designs will be watermarked. 24-Nov-20 08:04 PM I don’t care about that. 24-Nov-20 08:05 PM Oh really? They didn't include CAM with my educational copy 24-Nov-20 08:06 PM We also have someone who works for a firm with connections. 24-Nov-20 08:06 PM I guess it depends on your specific request. On my school's FSAE racing team, we have special licenses that has full FEM simulations, pro PDM and 5 axis machining 24-Nov-20 08:06 PM And we put like 2 licenses on virtual machines, and everyone just remote desktop into that 24-Nov-20 08:07 PM we have a solidworks professional license 24-Nov-20 08:07 PM for education 24-Nov-20 08:07 PM we had the regular education version before designs being watermarked, nbd. the popup telling you they're watermarked? 24-Nov-20 08:08 PM But... my laptop probably can’t run it. 24-Nov-20 08:09 PM PDM is the nice thing for working with a team of people. Fusion's cloud is just never very appealing 24-Nov-20 08:09 PM Now there’s something called 3DExperience which is supposedly browser based SolidWorks in a cloud. 24-Nov-20 08:09 PM It's not very good 24-Nov-20 08:09 PM We’ve got license to that too. 24-Nov-20 08:09 PM I also like Solidwork's drawings much better than Fusion's 24-Nov-20 08:10 PM And at least there I don’t have to worry about installing software on my poor laptop. 24-Nov-20 08:10 PM Easier to standardize, faster to make, and looks better out of the box without too much set up 24-Nov-20 08:10 PM Yeah I hate fusion drawings 24-Nov-20 08:10 PM Its the worst 24-Nov-20 08:10 PM If I sent more parts out to be fabed instead of doing it in house I would be more upset 24-Nov-20 08:10 PM I learned on inventor back in high school 24-Nov-20 08:11 PM Autodesk must think that no one makes paper drawings anymore in the 21st century 24-Nov-20 08:11 PM And that was pretty good. I still like it better than fusion by a lot 24-Nov-20 08:12 PM They haven't pushed a major update to the drawings part in YEARS 24-Nov-20 08:12 PM Its been on the road map forever 24-Nov-20 08:12 PM Whereas now Eagle is essentially part of Fusion, and huge amounts of other features are added, like their generative design or whatever 24-Nov-20 08:12 PM When I need welding done its the worst 24-Nov-20 08:12 PM I still use Kicad instead of eagle 24-Nov-20 08:12 PM But I am tempted to switch 24-Nov-20 08:14 PM I haven't checked out Eagle in Fusion yet. But it integrates pretty well with mechanical CAD 24-Nov-20 08:14 PM Becuase CAD + EDA in one kinda sounds cool 24-Nov-20 08:14 PM And thermal simulations... etc. If you're into that 24-Nov-20 08:14 PM Yeah exactly 24-Nov-20 08:14 PM You can drive your PCB footprint with sketches in CAD 24-Nov-20 08:14 PM And it renders electrical components in 3D and updates them in your MCAD assembly as a unique component synchronously 24-Nov-20 08:16 PM Yeah. Some stuff I am working on down the road would benefit a lot from that, but I just really like kicad 24-Nov-20 08:24 PM Our shop prefers being given dimensioned PDFs to badly made CAD files 24-Nov-20 08:25 PM Our school's CNC shop will only accept a student job if you give them both and ask very nicely 24-Nov-20 08:26 PM I like that 24-Nov-20 08:26 PM They have yelled at many seniors and ME majors around this time of year when they're scrambling to get projects done 24-Nov-20 08:26 PM "Unconstrained garbage" is a common one 24-Nov-20 08:26 PM Turns out when the entire shop 24-Nov-20 08:26 PM Is to serve a demographic that takes precisely zero courses with practical design components 24-Nov-20 08:27 PM Oh they also prefer Siemens NX, which happens to be hot garbage imo 24-Nov-20 08:27 PM They get flexible 24-Nov-20 08:27 PM Our shop has half “I’m just doing what the instructions say” and half closet scientists 24-Nov-20 08:27 PM I like the mix 24-Nov-20 08:29 PM Machine shops at schools are a special context... the students are never taught drafting and CAD well, and the students never even get to touch a lathe 24-Nov-20 08:29 PM Giving them a properly drawn, properly designed DXF makes them happy 24-Nov-20 08:29 PM But it’s not the students fault 24-Nov-20 08:30 PM We have a student shop with four nice big colchester lathes and three Bridgeport knee mills 24-Nov-20 08:30 PM Available 24/7, must have two people in the room for safety 24-Nov-20 08:31 PM I think all mechanical engineering majors need to take a 1 credit manual machining course at my school 24-Nov-20 08:31 PM 35 hour course required to use it 24-Nov-20 08:31 PM They think 3D printers are the magical solution to make anything - why? Because 3D printers are the only CAD/CAM CNC they have been exposed to 24-Nov-20 08:31 PM And most take the full semester course 24-Nov-20 08:31 PM AFAIK zero injuries over the past couple decades? 24-Nov-20 08:31 PM NIce! 24-Nov-20 08:32 PM US universities seem to have it really good with machine shop access 24-Nov-20 08:32 PM I'd love a 24/7 shop... 24-Nov-20 08:32 PM But unfortunately the student shop is only staffed by people who really wants to go home by 4:30 24-Nov-20 08:34 PM I’d love to get more lathe experience and CNC mill and stuff. Even as a grad researcher you can’t touch one, there is no training or induction pathway to get to touch one. Only do a drawing, submit a job request, and get your supervisor to sign off on the cost center. 24-Nov-20 08:35 PM There should be CAM classes at your uni? Even if it requires some courses you haven't taken yet, as a grad student you should have a much easier time getting in 24-Nov-20 08:35 PM That's partially what I did, though I didn't do it for any credit 24-Nov-20 08:36 PM Like, I need to use the FIB or the diamond CVD reactor? Sure, here’s the supervised training program you must do. But not for a lathe 24-Nov-20 08:36 PM Mostly did it so I can make parts on the Haas for the racing team 24-Nov-20 08:36 PM And we don’t do any on-campus student teaching due to COVID 24-Nov-20 08:36 PM Sanded and filled and sanded, then one layer of paint 24-Nov-20 08:36 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/image0-1380D.jpg 24-Nov-20 08:37 PM But yeah you can learn a lot just by watching machining videos, though hands-on experience is required if you have never done any manual machining before 24-Nov-20 08:38 PM Maybe I should 3D-print the two tamper halves and the pit, to replace the bearing ball 24-Nov-20 08:39 PM I still want one. 24-Nov-20 08:40 PM I’ll make you one 24-Nov-20 08:40 PM It doesn’t have postal restrictions 24-Nov-20 08:41 PM The shop isn’t staffed 24/7 24-Nov-20 08:41 PM But you don’t need staff 24-Nov-20 08:43 PM We’re not allowed to go in the shop at all if the staff aren’t there - it’s locked during staff break time 24-Nov-20 08:43 PM Land of rules and bureaucracy 24-Nov-20 08:44 PM TAs are not even enough... 24-Nov-20 08:44 PM But student TAs can use the Haas minimill unsupervised 24-Nov-20 08:46 PM HA! 24-Nov-20 08:46 PM I mean you still need to find a UN number for it for the lulz 24-Nov-20 08:47 PM The best thing to go with it would be that replica of the WW2 pit transport case that somebody made 24-Nov-20 08:49 PM The pit transport case is also gorgeous, yes. 24-Nov-20 09:18 PM Alex Wellerstein found a color photo of it. 24-Nov-20 09:18 PM Apparently the bumpers were just drilled rubber stoppers. 24-Nov-20 09:18 PM @a_quiet_scientist I love it! 24-Nov-20 09:18 PM I think it looks good with the ball bearing, but I’d like to see the other printed tamper and the stand. 24-Nov-20 09:18 PM I think the STL may have been a bit unrealistic in stand dimensions relative to the photo but I’m not sure. 24-Nov-20 09:25 PM Yeah I didn’t make a stand, I just flattened a bit off the bottom of the aluminium pusher, but realistically it should be a half-sphere in a stand 25-Nov-20 12:53 AM Wait I didn't know enrichment significantly affects your SU time? 25-Nov-20 12:53 AM I don't have any power or navy nuke experience, but I did spend the better part of the last 6 months working on research reactor conversion plans, and there didn't seem to be any info about cycle length changes for MIT/MURR/NIST. 25-Nov-20 01:29 AM “Oh look at me, I’ve got beryllium laying around, and FC40 Fluorinert” 25-Nov-20 01:30 AM Heh 25-Nov-20 06:48 AM @DeltaMed910 I’m certainly not an expert in this, but I have heard that nuke subs frequently use HEU or some amount of enrichment that is significantly above commercial power reactors, and that it is because of requirements that they have to vary their power levels quickly. Naval reactors are also typically classified in their design. So I was speculating that the same tech could be scaled up to make commercial power reactors that could follow the load and be shut down nightly, but it would be a non-starter due to the high enrichment. 25-Nov-20 06:48 AM Quite the contrary, a lot of research reactors worldwide were built with HEU, and the US is helping to convert them to LEU so that there is less HEU in the wild posing a proliferation risk. 25-Nov-20 06:48 AM And... this is the beryllium sphere I want: 25-Nov-20 06:48 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/image0-99F28.jpg 25-Nov-20 06:59 AM Huh, I didn't know that bit about changing power levels very quickly. There are other benefits to HEU too-- to maintain the same neutronics performance as that of a HEU core, a LEU core generally needs more U in each fuel element, more fuel elements, a larger core volume, and a higher thermal power (for the same thermal neutron flux). HEU fuel often has a U density of 1-2 gU/cm3. Yeah, a big part of the conversion has been done with a fuel compound U3Si2, which has an unusually high uranium density at 4.18 gU/cm3. After all, if you need to decrease your "u-235 density" (enrichment), then you ought to increase the overall density of the U itself in your fuel. But it's still insufficient to convert the "High Performance Research Reactors" (HPRRs), like U Missouri, MIT, NIST, HFIR, and ATR. These reactors are waiting for the approval of low-enriched U-Mo fuel (15 gU/cm3) to convert while maintaining HEU performance. So, I'm not sure which aspects of research reactors really scale up to power reactors. Hell, your rate of power change ("period") might even be just limited by how fast you can raise your control rods! After all, raise those rods fast enough and... 25-Nov-20 12:51 PM One of our engineers here at work was a plant technician on a nuke sub in the 70’s. Evidently they were really not very complicated beasts. Decommissioning them is evidently more complicated than building them in the first place. When they pull a sub out of service They cut off the ends of the boat and recycle them turn the reactor section into pill shaped time capsules of let the future worry about it! 25-Nov-20 01:03 PM slow release formula 25-Nov-20 01:34 PM I don't think nuclear power can be cost competitive in the us 25-Nov-20 01:34 PM I wish companies like NuScale would focus on retrofit of steamships 25-Nov-20 01:34 PM Then they might actually have a viable business 25-Nov-20 01:34 PM Energy costs on a steamer are like $500/megawatthour 25-Nov-20 01:34 PM Compared to $30/MWh on land 25-Nov-20 01:41 PM There are too many security concerns with privately owned floating reactors for that to be a viable market 25-Nov-20 01:41 PM The military ships with reactors get away with it by being military ships haha 25-Nov-20 02:15 PM I am like 95% done reversing, and half-way interfacing (I'd like to pick a different controller), with this terminal keyboard. There are still a few things that do not seem to work as expected, like the Shift keys, they appear to be mapped to nothing, scancode wise (0x00), but the shift-lock works fine. Also, even though it has a 16 buffer for the keypresses, key-up (depressing) isnt registered. The key-repeat occurs after so long, and that timer is stopped on depress (within the keyboard uC code). Ea key has a scancode config of things such as key_repeat-able, for both unshifted and shifted modes (separately), if it is a letter/number, and if the following char, typically the ascii scancode, instead is a pointer (two different kinds) .. not sure how this all works (the only real ref is if there is an 'initial row' which may be a dipswitch config that mine does not have, that can change the behavior) 25-Nov-20 02:16 PM @rdpierce Heh yeah there was talk about the Otaniemi research reactor using enriched enough uranium for it to be suitable for making a bomb. 25-Nov-20 02:16 PM This came up in an article about if the Otaniemi penisula could become an independent micronation. 25-Nov-20 02:16 PM And it was theorized that leveraging the Physics, Chemistry and Mechanical engineering departments equipment could allow them to make a simple gun-type nuke that could plausibly work. Giving them a nuclear deterrent right next to the capital :D 25-Nov-20 02:16 PM Perhaps unsurprisingly the reactor is now in the process of being decomissioned as far as I know 25-Nov-20 02:16 PM Too bad I never got to visit 25-Nov-20 02:20 PM The small reactor at my school used to be fueled with uranium metal fuel with enrichments somewhere above 20%, can't find any sources on the exact enrichment 25-Nov-20 02:20 PM It was converted to 5% enriched fuel like 40 years ago though 25-Nov-20 02:24 PM Hmm. The FiR 1 reactor in Otaniemi was a Mark2 TRIGA and ran on "The fuel material was uranium zirconium hydride (UZrH), which contained 8–12 % of uranium. The fuel enrichment was 20% of uranium-235." 25-Nov-20 02:25 PM There was big pressure from some non-proliferation treaty to decrease enrichment in all research reactors all around the world... 25-Nov-20 02:25 PM Yep 25-Nov-20 02:25 PM "There are a total of 103 spent fuel rods in the reactor building. They contain 21.4 kilograms (47 lb) of uranium in total." "In addition to the spent fuel, 24 unused fuel rods are stored in the building. They contain 5.7 kilograms (13 lb) of uranium in total.[6]" 25-Nov-20 02:27 PM In "our" czech research reactor fuel was enriched to 37% and now they are using 20%... 25-Nov-20 02:29 PM :D nice 25-Nov-20 02:47 PM @adammunich SMRs are not cost-competitive if you look at the electricity cost numbers today, but then nothing is cost-competitive with fossil fuels if you don't heavily subsidize them. Also, where are you getting this $30/MWh number from? 25-Nov-20 02:47 PM That's a less than a third of the US average price for residential users https://www.electricchoice.com/electricity-prices-by-state/#:~:text=The%20average%20electricity%20rate%20is,is%2013.31%20cents%20per%20kWh. 25-Nov-20 02:47 PM And less than half of the levelized cost for combined cycle conventional natural gas 25-Nov-20 02:55 PM @Mason_Yu $30 is the typical cal iso price 25-Nov-20 02:57 PM https://www.eia.gov/electricity/monthly/epm_table_grapher.php?t=epmt_5_6_a 25-Nov-20 02:57 PM I just don't see the ultimate cost being so low in any data I can access from the EIA... 25-Nov-20 02:57 PM But if we have $30/MWh going to industrial and commercial users, then there is absolutely no new energy sources that can compete, even with super high subsidies 25-Nov-20 02:57 PM Which is a big problem for the energy transition in general, not just specific to nuclear 25-Nov-20 02:57 PM As it is with the costs of electricity shown in the above table, there is very little chance that large nuclear plants can succeed in the US, mainly due to the regulatory environment and inefficiencies during plant construction 25-Nov-20 02:57 PM In select cases it may be possible, but it is time that new options are evaluated, and it's too soon to write SMRs off the table imo 25-Nov-20 03:29 PM One can look at this a different way. 25-Nov-20 03:29 PM Economists talk about externalities. 25-Nov-20 03:29 PM When someone not party to a transaction bears a cost or gets a benefit. 25-Nov-20 03:29 PM Markets fail to price things efficiently in the presence of these. 25-Nov-20 03:29 PM In this case, fossil fuels pay nothing for the externality of the carbon they emit. 25-Nov-20 03:29 PM Low cost gas from fracking is producing electricity that nuclear can't compete with. 25-Nov-20 03:48 PM But that's because fossil fuels don't have to pay the economic consequences of climate change. 25-Nov-20 03:48 PM Tax carbon and suddenly nuke power becomes competitive 25-Nov-20 08:01 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/image0-46967.jpg 25-Nov-20 08:07 PM memes? 25-Nov-20 08:07 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/Untitled153_20201123132514-7690D.png 26-Nov-20 01:22 AM Imagine if Analog Devices wanted to compete with TI in the calculator market... it would cost $1000 but it would be so fast and slick 26-Nov-20 01:38 AM Nah that would be Linear Technology 26-Nov-20 01:38 AM And it depends on what chips you are looking at, AD seems rather comparable in price, or cheaper than TI, when it comes to many RF things 26-Nov-20 01:39 AM is there a difference between LT and AD now? 26-Nov-20 01:39 AM Nope ;P 26-Nov-20 01:39 AM But there used to be 26-Nov-20 01:39 AM LT was usually always better than TI switchers in more or less all parameters, and cost twice as much, or more 26-Nov-20 01:41 AM I dealt with a good mix of LT and TI switchers 26-Nov-20 01:41 AM Same 26-Nov-20 01:41 AM They are a treat to use 26-Nov-20 01:41 AM except that LT part that liked to explode on that one board at work, if it did not have firmware loaded to one embedded controller 26-Nov-20 01:41 AM I'm just mehhh whatever, depends on what I need doing and for what board size, convenience factor, etc 26-Nov-20 01:41 AM Ya 26-Nov-20 01:41 AM Many LT parts also have -20C and -40C temperature specs 26-Nov-20 01:42 AM I had a LT switching part burn on me even though I used the example design faithfully 26-Nov-20 01:42 AM no idea why 26-Nov-20 01:43 AM Yeah that funky board was mysterious 26-Nov-20 01:43 AM was designed by this dude with +30years of experience under his belt 26-Nov-20 01:43 AM The bald, bearded type who ran openbsd on his personal machines 26-Nov-20 01:44 AM wow 26-Nov-20 01:44 AM bringing out the stereotypes I see 26-Nov-20 01:44 AM Yea 26-Nov-20 01:44 AM And not in all the good ways 26-Nov-20 01:44 AM was my boss :D 26-Nov-20 01:44 AM The board worked fine, with no failures in power delivery, if the firmware was loaded to that one atmega 26-Nov-20 01:44 AM I think I killed 3-6 of them with all kinds of mistakes and power stupidity 26-Nov-20 01:44 AM and found fun cascade failures 26-Nov-20 01:44 AM like how the ESD protection diodes dumped 24V to the 3V3 rail if you plugged a mechanically compatible cable on the wrong side of the board 26-Nov-20 01:46 AM oh lol 26-Nov-20 01:46 AM And the 3V3 line then cascaded that 24V from a 18A supply up the PDN to some 5V regulators 26-Nov-20 01:46 AM So not only did it kill stuff on that 3V3 rail, it killed stuff on the upstream 5V rail too :D 26-Nov-20 01:47 AM at work we have a switching part 26-Nov-20 01:47 AM let's see 26-Nov-20 01:47 AM it's an AD part 26-Nov-20 01:47 AM https://www.analog.com/media/en/technical-documentation/data-sheets/ADP2302_2303.pdf 26-Nov-20 01:47 AM that rarely, but it happens 26-Nov-20 01:47 AM would glitch out 26-Nov-20 01:47 AM and dump 12v onto the 5v output 26-Nov-20 01:47 AM we had board die randomly that way 26-Nov-20 01:49 AM :D nice 26-Nov-20 01:49 AM Did you fix it in some sane way or just throw a few amp TVS at the output? 26-Nov-20 01:49 AM no 26-Nov-20 01:50 AM Oh yeah, fun thing 26-Nov-20 01:50 AM You know those ebay DCDC boards 26-Nov-20 01:50 AM it's now a case of - new revision of controller is coming out 26-Nov-20 01:50 AM let's not even bother since it happens so rarely 26-Nov-20 01:50 AM yeah? 26-Nov-20 01:50 AM Some of the chips are pirate copies of the TI chips 26-Nov-20 01:50 AM I see 26-Nov-20 01:50 AM Not only is the switching frequency different 26-Nov-20 01:50 AM there's a fun glitch 26-Nov-20 01:50 AM if the input voltage is low enough 26-Nov-20 01:50 AM It will glitch and feed around 50V at it's output 26-Nov-20 01:50 AM Which is bad in a battery powered device feeding something running on 5V or 3V3 :D 26-Nov-20 01:51 AM lol 26-Nov-20 01:51 AM also I didn't think I would wake up to talk about burning switchers lol 26-Nov-20 01:51 AM I've been burned by switcher glitches, this hits close 26-Nov-20 01:53 AM Even better is that it's not documented, because it's a pirate copy 26-Nov-20 01:53 AM Tho the "compatible" clone chips are not much better. 26-Nov-20 01:53 AM lol 26-Nov-20 01:53 AM this LT part 26-Nov-20 01:53 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/unknown-78A89.png 26-Nov-20 01:53 AM I couldn't get it to work 26-Nov-20 01:53 AM at all 26-Nov-20 01:54 AM Strange 26-Nov-20 01:55 AM the MOSFET would just burn up 26-Nov-20 01:55 AM NGATE would always be high 26-Nov-20 01:55 AM no switching 26-Nov-20 01:57 AM lovely 26-Nov-20 02:01 AM I should get back to working on my own SMPS 26-Nov-20 02:01 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/unknown-A7309.png 26-Nov-20 02:01 AM push pull design 26-Nov-20 02:01 AM driven by 26-Nov-20 02:01 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/unknown-ED5F8.png 26-Nov-20 02:01 AM STM32F3 26-Nov-20 02:01 AM the transformer was one that was meant for a 12v --> 230v inverter 26-Nov-20 02:01 AM but now I am pushing 24v through it 26-Nov-20 02:01 AM transformer abuse 26-Nov-20 02:01 AM this is obviously for the laser thing I am working on 26-Nov-20 02:01 AM right now I gotta figure out how to build a pseudo-simmer supply 26-Nov-20 02:01 AM if I can just use a MOSFET in parallel with the IGBT as a Voltage Controlled Resistor 26-Nov-20 02:01 AM or rather, how reproducible and repeatable would it be 26-Nov-20 05:05 AM I guess that transformer has an iron core and is used at a low switching frequency? Is that Capacitor on the top schematic supposed to suppress spikes or to be used in resonance, or did you forget a rectifier? You might saturate the transformer core by applying twice the rated voltage. If you want to get a DC output you can alternatively use a voltage doubling rectifier, like a delon circuit. I guess you want to pulse the lazer with the IGBT and constantly pass a trickle current by running a parallel MOSFet at a small gate voltage? I'd say that that could work, but the current through the MOSFet would be temperature dependent and the trickle current would likely drift a lot. What voltage does the flash lamp ignite/burn on and what flash/trickle currents do you intend to run it at? I'm happy to help with power electronics related stuff 26-Nov-20 09:50 AM I have no idea what the flashlamp takes 26-Nov-20 09:50 AM so I can only tell based on other people's teardowns and stuff like that 26-Nov-20 09:50 AM on one unit, people have measured 800v 26-Nov-20 09:50 AM so I am looking at 800v - 1000v 26-Nov-20 09:50 AM simmer current I am looking at 50 - 100 mA 26-Nov-20 09:50 AM the capacitor is meant to be the energy storage capacitor for the flashlamp 26-Nov-20 09:50 AM my idea is to do a push-pull step up converter of sorts 26-Nov-20 09:50 AM yes - I think I am forgetting a diode before the cap - oops 26-Nov-20 09:50 AM the core is a EC42 core - according to the supplier, its working frequency is 15 kHz - 50 kHz 26-Nov-20 03:10 PM Take good care of that! Use a bleeder resistor in parallel with the output capacitor and maybe also use a neon bulb or similar as a charged-capacitor indicator, high voltage capacitors can be really scary and even deadly at worst... 26-Nov-20 03:10 PM A push-pull converter with a single diode on the secondary is not good as the load is asymmetrical and no current can flow through the secondary at one of the pulses. Use full-wave rectification, i.e. by using a full-bridge rectifier or a delon voltage doubler rectifier circuit 26-Nov-20 03:14 PM fried owl; smells good 26-Nov-20 03:14 PM Use full-wave rectification, i.e. by using a full-bridge rectifier or a delon voltage doubler rectifier circuit I'll look at that 26-Nov-20 03:14 PM I will be adding a bleeder resistor into the circuit, that's for sure 26-Nov-20 03:14 PM the capacitor I am looking at is one rated at 1400v, 100 uF 26-Nov-20 03:14 PM which is what the machines for these sorts of lasers use 26-Nov-20 03:22 PM Have fun bleeding that one: https://www.digikey.com/en/resources/conversion-calculators/conversion-calculator-capacitor-safety-discharge When discharging that from 1000V to 24V within one minute a sufficient bleeder resistor will need to dissipate more than 6 Watts at 1000 Volts... 26-Nov-20 03:22 PM even at 1000v, a fully charged 100 uF capacitor can surely give more than a punch 26-Nov-20 03:24 PM I haven't done calculations, but I estimate that at a decent switching frequency (like 30 kHz) you will have a low output voltage ripple with a significantly smaller capacitor 26-Nov-20 03:26 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/unknown-E344E.png 26-Nov-20 03:26 PM I am pretty sure a bunch of ceramic wirewound resistors would do the trick 26-Nov-20 03:31 PM you can do so if you like, but I wouldn't hold those 50 Joules if there is no need. You might do well with a tenth of that capacitance/energy. 50 Joules drained in a tiny fraction of a second would be frightening to witness 26-Nov-20 03:34 PM I am using this laser for a purpose where output fluence of a few 10s of J/cm^2 is standard 26-Nov-20 03:34 PM I am pretty sure that that sizing is needed 26-Nov-20 03:36 PM I see. I first thought the capacitor would only need to reduce output voltage ripple for a ~100mA load 26-Nov-20 03:37 PM the capacitor is going to be the main energy storage capacitor 26-Nov-20 03:37 PM the pseudo-simmer VCR using a MOSFET in parallel with my IGBT is meant to eliminate having a dedicated simmer supply 26-Nov-20 03:37 PM What kind of pulse current and pulse duration are you trying to achieve? I have no clue of your project scale... 26-Nov-20 03:41 PM let me DM 26-Nov-20 09:45 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/127791030_216182963202087_2252602564172188-B3D10.png 26-Nov-20 10:49 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/EnxDm4bXEAsRFbp-58618.jpg 26-Nov-20 10:49 PM Hope everyone had a nice Thanksgiving and did not eat too much delicious food like I know I did 26-Nov-20 11:20 PM https://twitter.com/ZJemptv/status/1330803659031130112 26-Nov-20 11:25 PM nuuuuu 27-Nov-20 11:22 AM I went down a rabbit hole last night.. turboshaft motors.. basically a turbo compressor + fuel -> turbine to spin a shaft, vs thrust from a turbojet 27-Nov-20 11:25 AM helicopters use that 27-Nov-20 11:25 AM yup 27-Nov-20 11:25 AM that's about all I know 27-Nov-20 11:25 AM XD 27-Nov-20 11:25 AM and tanks, as I found out 27-Nov-20 11:25 AM which is what started me down the path 27-Nov-20 11:25 AM https://en.wikipedia.org/wiki/Honeywell_AGT1500 27-Nov-20 11:25 AM I think that is it 27-Nov-20 11:26 AM oh, neat 27-Nov-20 11:26 AM there was a tv show that showed it being built and whatnot in various stages 27-Nov-20 11:26 AM and mentioned the 'power pack' 27-Nov-20 11:26 AM better weight/power ratio than normal (super sized) diesels, was one reason 27-Nov-20 11:26 AM it seems like most people experimenting making one use a turbo or two.. I saw one good example on YT last night of a proper home made one 27-Nov-20 11:26 AM heh, dry weight of the engine in it is 180-240kg.. for 1500-3000 shaft horsepower 27-Nov-20 11:26 AM the tank engine, that is 27-Nov-20 11:26 AM are turbomolecular vacuum pumps any good at compressing, or is t he geometry wrong 27-Nov-20 11:26 AM I havent actually taken mine apart, in clean condition so no need 27-Nov-20 11:26 AM I'd also imagine it's not designed for much torque, ie, fins can be bent with your fingers 27-Nov-20 11:26 AM but, the question somewhat remains 27-Nov-20 11:41 AM @Noxz Don't even think of repurposing some turbomachinery for different working conditions. I am studying turbo-stuff last year or two and main message is that efficiency is there just in pretty narrow region. So using turbomolecular pump for non-vacuum work is (very probably) no way... 27-Nov-20 11:41 AM opinion on people at home using car turbos? 27-Nov-20 11:41 AM I dont think I would ever do that, myself.. if I wanted to make something I would likely engineer it from the ground up, no repurposing 27-Nov-20 11:41 AM also, bbiab, need to clear the leaves off the roof 27-Nov-20 11:51 AM AFAIK it is hard to get any reasonable thrust from those "car turbo + simple combustion chamber", however converting them to turboshaft is interesting idea. 27-Nov-20 12:05 PM If you want some inspiration, look at Rover 1S60 - APU from Vulcan bomber, used as portable firebrigade water pump. Dead simple ("4 moving parts") and with megacool handcranking starter... 27-Nov-20 12:20 PM @Noxz repurposing turbochargers for what purpose? Just making a turbojet or something beyond that? 27-Nov-20 12:20 PM turboshaft is the topic at hand 27-Nov-20 12:20 PM which differes from a turbojet in that the exhaust spins a turbine instead of jet propulsion 27-Nov-20 12:20 PM turbine->shaft 27-Nov-20 12:26 PM Yeah I just was not clear on what you were asking about with repurposed car turbos. All of the ones I have seen that I remember are just turbojets. A turboshaft would be a lot more work than just a turbojet 27-Nov-20 02:32 PM has encountered a problem that requires more than her engineering diploma to solve 27-Nov-20 02:32 PM in fact the problem is such that I don't need no engineering qualifications and knowledge 27-Nov-20 02:32 PM I should have attended the Hogwarts School of Witchcraft and Wizardry 27-Nov-20 02:32 PM let's put it this way - a client bugging us about connectivity issues for our IoT stuff 27-Nov-20 02:32 PM I've done a barrage of tests yesterday, and have collected nearly 12 hours of networking data 27-Nov-20 02:32 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/unknown-24327.png 27-Nov-20 02:32 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/unknown-A48BB.png 27-Nov-20 02:32 PM The incoming connection is so intermittent and unstable 27-Nov-20 02:32 PM that our stuff just can't function normally at times 27-Nov-20 02:32 PM I won't be surprised that I can compile all the disconnects 27-Nov-20 02:32 PM compile all the stats 27-Nov-20 02:32 PM and even prove that it's not our hardware's fault (cause the entire controller was replaced at this point) 27-Nov-20 02:32 PM they'll accept that it's a networking issue 27-Nov-20 02:32 PM BUT 27-Nov-20 02:32 PM they're fully expecting and demanding us to: 27-Nov-20 02:32 PM https://tenor.com/view/harry-potter-expecto-patronum-spell-gif-13914387 27-Nov-20 02:32 PM they in fact demanded us to pretty much perform magic 27-Nov-20 02:32 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/unknown-2F060.png 27-Nov-20 02:32 PM can I perform magic though? 27-Nov-20 02:32 PM I think I can 27-Nov-20 02:32 PM just need a few hundred billion dollars 27-Nov-20 02:32 PM I'll go to the Philippines and buy the entire freaking telco/ISP 27-Nov-20 02:32 PM and revamp the telecommunications infrastructure there 27-Nov-20 02:32 PM hey - even magic comes at a cost 27-Nov-20 02:32 PM customer support... sigh. 27-Nov-20 03:33 PM hardware loadbalancer that retries? 27-Nov-20 03:33 PM that's what we use a bunch of 27-Nov-20 03:33 PM 'we' = ex-job 27-Nov-20 08:42 PM Nah, if the thing doesn't get a connection, then by design, no one should be able to use it 27-Nov-20 08:49 PM I am now wondering whether I’m really learning Signals and Systems, or if this was preparation for sniper training? 27-Nov-20 08:49 PM I mean, seriously.... 27-Nov-20 08:49 PM Erm? 27-Nov-20 08:49 PM what? 27-Nov-20 08:49 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/image0-0B83F.png 27-Nov-20 08:49 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/image1-3C3B2.png 27-Nov-20 08:49 PM Spot the poles and zeroes and identify the region of convergence in the following diagram: 27-Nov-20 08:49 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/image0-50A06.jpg 27-Nov-20 08:49 PM We’ve finished with Laplace transforms and are now doing Z transforms. 27-Nov-20 09:00 PM oh 27-Nov-20 09:00 PM ohhh 27-Nov-20 09:01 PM @rdpierce don't shoot me 27-Nov-20 09:02 PM just don't touch wick rotations kthx 27-Nov-20 09:09 PM I think I’m doing quantum mechanics next summer. 27-Nov-20 09:09 PM But it’s an assorted hodgepodge of physics. Relativity, thermodynamics, optics.... basically whatever doesn’t fall under classical mechanics and E&M. 27-Nov-20 09:09 PM So not a lot of quantum. 27-Nov-20 09:16 PM wick rotations are done by people who are too good for quantum 27-Nov-20 09:16 PM Wick rotation connects statistical mechanics to quantum mechanics by replacing inverse temperature with imaginary time . 28-Nov-20 02:15 AM @SleepyOwl Joyce Can you just increase timeouts/connection retries? 28-Nov-20 05:11 AM Of course you can, that only masks the issue 28-Nov-20 06:31 AM @idmb that sounds evil. 28-Nov-20 11:51 PM furry demon core alert https://twitter.com/Sword_Lesbians/status/1331079876682551301 29-Nov-20 01:14 AM Don’t know where they got that idea from 29-Nov-20 01:14 AM Meanwhile at AliExpress 29-Nov-20 01:14 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/image0-E7ACC.png 29-Nov-20 02:08 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/image0-9EFFD.jpg 29-Nov-20 02:12 AM goes well with that guy that brought (and cut?) Beryllium sheet in a restaurant 29-Nov-20 11:29 AM Does anyone now if a SS-BSE detector can be damaged by excessive IR ligth from a chambercam ligth? 29-Nov-20 11:39 AM It shouldn't 29-Nov-20 11:39 AM It's not a warning I have seen before at least 29-Nov-20 11:40 AM Oh fun meth production 29-Nov-20 11:41 AM huh? 29-Nov-20 11:41 AM okay thougth so, it's always quite confusing when the detector get's saturated:D 29-Nov-20 11:41 AM Is your bse saturated by the chamber cam? 29-Nov-20 11:42 AM Sorry about the interruption, saw activity here which made me notice the thorium thing (I could have sworn that was one unfortunately common ThO2 use) 29-Nov-20 11:42 AM well it get's a ton of counts 29-Nov-20 11:42 AM and this seems to be the problem nearly on every SEM, at least most chamberscope manufacturers write "A simple On/Off switch is provided so that solid state backscatter (BSE) and EDS detectors are not affected by the infrared light." 29-Nov-20 11:49 AM Yeah, it doesn't affect every type but the most sensitive ones for sure 29-Nov-20 11:51 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/IMG-20201129-WA0010-ED44B.jpeg 29-Nov-20 11:51 AM beam current? 29-Nov-20 11:51 AM yes 29-Nov-20 11:51 AM neat 29-Nov-20 11:51 AM also stagebias 29-Nov-20 11:53 AM also neat 29-Nov-20 11:54 AM Ooooo 29-Nov-20 11:54 AM I need to step up my auxiliary instrumentation game 29-Nov-20 11:54 AM hehe:D 29-Nov-20 11:55 AM What kind of stage bias are you running? 29-Nov-20 11:55 AM The poll piece on my 6320 is flat enough I have thought about trying a few kv of beam decel on it 29-Nov-20 11:56 AM i can go up to 1kV with the keithley but never really used it, just a neat feature of the instrument 29-Nov-20 11:56 AM i only need the beamcurrent for lithography 29-Nov-20 11:56 AM measurement is done by a faradaycup on the stage since i dont have one in the column 29-Nov-20 11:56 AM With the scancontroller I'm designing, EBIC should be easy but that will take some time 29-Nov-20 12:00 PM Does the 6460 have a pcd port? 29-Nov-20 12:00 PM Oh nice 29-Nov-20 12:00 PM Any chance the scan controller will be open source? 29-Nov-20 12:00 PM for sure 29-Nov-20 12:00 PM Very cool 29-Nov-20 12:00 PM I know a lot of people would benefit from a good one 29-Nov-20 12:01 PM everything is open source, but I'm too lazy to make a website:D 29-Nov-20 12:01 PM Fpga or? 29-Nov-20 12:01 PM I'm still at the analog part so nothing done at the digital part yet 29-Nov-20 12:01 PM and i'm always switching between uC and FPGA based 29-Nov-20 12:03 PM How are you doing scaling and centering? 29-Nov-20 12:05 PM scaling will be done at the analog part, centering will be auto calibration 29-Nov-20 12:09 PM Nice, saves a lot of dynamic range that way 29-Nov-20 12:10 PM (so the uC/FPGA set's the gain of the main amplifier so there should be no loss in resolution of the dacs 29-Nov-20 12:10 PM yes 29-Nov-20 12:11 PM Even better than using pots 29-Nov-20 12:12 PM the really troubling thing will be the calibration of the DACs 29-Nov-20 12:12 PM and the GUI for everything, I'm not really a software enthusiast 29-Nov-20 12:25 PM That’s awesome 29-Nov-20 12:25 PM You’re designing an open source SEM yourself? 29-Nov-20 12:29 PM No:D that would be way to much work, i'm just adding a lot of fun stuff to my SEM 29-Nov-20 12:40 PM well at least at the level of commercial full size scopes. 29-Nov-20 12:40 PM Applied Science did a good video series of a diy SEM but it was rather more proof of concept. Sure there is much more possible, but even the calculations/design of the column will take several months if you start from scratch. But thats the great thing about Appl. Sc., in every video he does something completely different. 29-Nov-20 03:20 PM @verschrottix I'm a software person and GUIs are in my realm 29-Nov-20 03:47 PM @verschrottix An open-source scan controller would be absolutely awesome! 29-Nov-20 03:47 PM I was looking at using the Red Pitaya to do scan control and possibly image acquisition as well, but my SEM power supply is still very much broken and there's many things that needs to be fixed and built up again before I get to digital conversion 29-Nov-20 03:47 PM @nmz787 Speaking of GUI... 29-Nov-20 03:47 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/20201129_175537-32CFD.jpg 29-Nov-20 03:47 PM My Thanksgiving holiday project 29-Nov-20 03:47 PM A "universal" vacuum gauge controller (plus drag pump controller) 29-Nov-20 03:47 PM It should work with any 0-10V gauges (or any gauges with analog output) and can talk serial to most of them too. Two gauges can be connected at the same time and both will be logged in real time to a micro-SD card 29-Nov-20 03:47 PM I'm certainly no software person and this has taken bit longer than expected... Also I'm not sure if I can accommodate the turbodrag pump driver on the same ARM chip that's also running the GUI 29-Nov-20 03:47 PM If not, an Arduino Nano controlled over serial will have to do 29-Nov-20 04:03 PM Nice 29-Nov-20 04:03 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/image-20200411_170617-E4802.jpg 29-Nov-20 04:04 PM Ah that's what I had for like two year too 29-Nov-20 04:04 PM That was my presure GUI, with two temperature sensors too at the bottom 29-Nov-20 04:04 PM I'm pretty utilitarian 29-Nov-20 04:04 PM Most modern software pisses me off 29-Nov-20 04:04 PM Like all the automotive radio stuff, it just frustrates me to no end 29-Nov-20 04:05 PM I figured this is kind of a useful skill in industry 29-Nov-20 04:05 PM No configuration/customization, and too flashy at the cost of being slow and sluggish 29-Nov-20 04:05 PM The GUIs they made at work are utilitarian at best, eye sores at worst 29-Nov-20 04:05 PM No engineer at Intel really cares about prettiness 29-Nov-20 04:05 PM As long as it doesn't bug out and is sensible in terms of UI 29-Nov-20 04:05 PM Prettiness is nice but often a waste of time because there are bigger fish to fry 29-Nov-20 04:05 PM Unless it REALLY makes things easier to notice or stand out 29-Nov-20 04:05 PM Being intuitive is much more important to me 29-Nov-20 04:05 PM Sometimes that is aesthetics 29-Nov-20 04:08 PM I really just want a few core functionalities that all GUIs should have, a few buttons, plotting things, sliding bars and that's about it 29-Nov-20 04:08 PM labview guis are hilarious 29-Nov-20 04:08 PM ^ 29-Nov-20 04:08 PM That's all they use at work 29-Nov-20 04:08 PM It's not even funny though 29-Nov-20 04:08 PM A project I'm working on now, one guy is using labview and it seems actually really nice in terms of "get shi t done" 29-Nov-20 04:08 PM But not terribly performant for what is basically an oscilloscope view 29-Nov-20 04:09 PM I just prefer C or C++, that's all what this thing is using too 29-Nov-20 04:09 PM It is extremely nice for "get shit done" 29-Nov-20 04:09 PM Nice 29-Nov-20 04:09 PM Hey, the bot doesn't filter shit? 29-Nov-20 04:09 PM Oh 29-Nov-20 04:09 PM Huh, did that get turned off? 29-Nov-20 04:10 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/pressure_gauges2-BEFC7.jpg 29-Nov-20 04:10 PM It offers low level interaction, and is actually fast and efficient 29-Nov-20 04:10 PM here's our pressure gauge gui, a mess because... it doesn't matter if it's a mess 29-Nov-20 04:10 PM Lol 29-Nov-20 04:10 PM Super a mess 29-Nov-20 04:10 PM I've seen worse 29-Nov-20 04:11 PM monitor is low res, this is what the full screen normally looks like 29-Nov-20 04:11 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/Screen_Shot_2020-11-29_at_4.10.48_PM-8E024.png 29-Nov-20 04:11 PM because 99.99% of the time that's all you want 29-Nov-20 04:11 PM @Mason_Yu another guy on this project started a webserver in C++ to do the oscope GUI... It's been a learning curve since it's using some c11 stuff and newer 29-Nov-20 04:11 PM Fukushima 29-Nov-20 04:11 PM Seems like it’s off 29-Nov-20 04:12 PM Fukushima was filtered??? 29-Nov-20 04:12 PM Haven't even set the graph to show time lol 29-Nov-20 04:12 PM Scunthorpe problem 29-Nov-20 04:12 PM First three letters 29-Nov-20 04:13 PM Meanwhile blackberry with their job application website 29-Nov-20 04:13 PM @nmz787 I think it depends on the complexity of the project for sure and the need to interact with hardware. Right now I'm reading from two I2C buses and interacting with GPIOs for interlocks and doing real-time control for driving the drag pump. It'd be hard to satisfy all the hardware requirement with higher level languages/platforms 29-Nov-20 04:13 PM It would be harder for me to learn LabView, get some hardware that will run LabView and then put my code on it 29-Nov-20 04:14 PM Well I figure vacuum stuff can handle latency 29-Nov-20 04:14 PM Not so much for a BLDC motor controller 29-Nov-20 04:14 PM My pressure sensor and valve control was in python 29-Nov-20 04:14 PM Yeah, the firmware for this oscope like thing (picoammeter) is c++ 29-Nov-20 04:14 PM Low level register stuff is much more in my domain of c/c++ comfort 29-Nov-20 04:14 PM Vs guis and threading 29-Nov-20 04:17 PM @idmb Are you running your vacuum gauge GUI off a PC? Or something like a Raspberry Pi? 29-Nov-20 04:18 PM presently a desktop, will be a laptop when I bother setting up the way to stream data /commands between them without networking the laptop 29-Nov-20 04:19 PM I uninstalled everything from NI a while back to free up something like 20 GB of disk space 29-Nov-20 04:19 PM haha, yeah it's.. bloaty 29-Nov-20 04:19 PM Anything special needed? Or does all of your gauges talk serial/USB? 29-Nov-20 04:20 PM I want the laptop to stream statuses over rs232 regardless of what the other computer does / if it's disconnected, but be able to receive commands as well 29-Nov-20 04:20 PM Uh, some of them we went with using the analog output because the accuracy didn't matter and it can be hot-swapped between gauges 29-Nov-20 04:20 PM So what are you using as the ADC? 29-Nov-20 04:21 PM a random overpriced NI DAC/ADC 29-Nov-20 04:21 PM one of the USB ones, like $300 for something achievable for like $50 29-Nov-20 04:21 PM I wish I had a bunch of random NI peripherals like in any university lab 29-Nov-20 04:21 PM we have literally 20+ GPIB cables 29-Nov-20 04:21 PM That would make investing time into the NI ecosystem sensible 29-Nov-20 04:22 PM none of the new hardware uses it 29-Nov-20 04:22 PM I have none, and I hate GPIB 29-Nov-20 04:22 PM GPIB is more reliable than USB to serial adapters, in my experience 29-Nov-20 04:22 PM it never breaks with OS updates. it doesn't care if you move the cables around. 29-Nov-20 04:23 PM I remember why I installed LabView two years ago now, it was to grab data from my oscilloscope 29-Nov-20 04:23 PM Turns out just taking pictures was good enough after all... 29-Nov-20 04:24 PM man the tektronix labview programs 29-Nov-20 04:24 PM are so bloated 29-Nov-20 04:24 PM leybold ones too 29-Nov-20 04:26 PM I also don't have random PCs and monitors that are suitable for a project like this 29-Nov-20 04:26 PM I want an independent box that you plug 5V/12V into and just works 29-Nov-20 04:26 PM Independently of any other central control system, and I can move it around between systems and always know my foreline and chamber pressures 29-Nov-20 04:26 PM Total cost is likely around $75 for a prototype, but I've found ways to make it cheaper 29-Nov-20 05:52 PM @Mason_Yu I should note that I do appreciate good software that looks nice... I'm just grouchy because it seems like most modern stuff is pretty horrible 29-Nov-20 05:52 PM Usually all I think about in terms of color is using a palette that is OK for colorblind people 29-Nov-20 05:57 PM I know almost for sure this is not going to be the only gauge controller box I'll make, at the minimum I'll need two just for myself, so I thought it's worth the effort now to make it look decent and be able to log pressure data overtime. It would be very useful for the HPGe pump downs I'll be doing soon 29-Nov-20 05:57 PM Also, it's just a cheap analog data logger... I can use this for temperature or any other thing I want to log and just reuse 95% of the code 29-Nov-20 05:57 PM Surprisingly there's not a lot of cheap solutions to do this simple task with live-plotting, the most reasonable thing I can find would be a data logging multimeter 29-Nov-20 06:01 PM It is surprising 29-Nov-20 06:01 PM Laptop + ni box + power supply looks like a bargain compared to gauge controllers lol 29-Nov-20 06:04 PM https://www.ajvs.com/new/product_info.php?products_id=20250 29-Nov-20 06:04 PM It's just a rip-off frankly, they didn't even bother to put any buttons on this thing 29-Nov-20 06:04 PM And the 7-segment displays look absolutely awful under light 29-Nov-20 06:16 PM On the next revision, I will put an instrumentation amplifier for a Wheatstone bridge into the gauge controller, for thermal-conductivity gauges like mini-convectrons and some strain-gauges. And I'm debating if I should put a thermocouple amplifier in it too. I don't have any thermocouple gauges and I don't think they are particularly attractive compared to the super cheap MKS 901P 29-Nov-20 06:45 PM All the modern gauges pretty much put the active electronics on the head and you just read off 0-10V or serial 29-Nov-20 06:45 PM But if you want to use older second hand gauges... an open source interface for ion gauge tubes would be cool 29-Nov-20 06:45 PM And the ability to change the 0-10V mapping function is important because they’re usually a bit different on different ones 29-Nov-20 06:47 PM I think you're missing the complaint. They have all that, but then if you want to power them + display that on a display... It's like the $750 controller he linked 29-Nov-20 06:47 PM They don't make cheap devices that just power the gauge, read the 0-10V, and put it on a screen. You gotta do it all yourself or pay $100s 29-Nov-20 06:48 PM Yeah true 29-Nov-20 06:48 PM Yeah changing gauge calibration is easy and will be implemented by default. Ion gauge read out will be a bit more tricky and I don't have a (working) one to test. I think the calibration for ionization gauges would be a lot trickier 29-Nov-20 06:49 PM surely a working nude ion gauge is easily accessible for free? 29-Nov-20 06:50 PM Also hot cathode vs cold cathode...etc 29-Nov-20 06:50 PM My 1.5” OLED readout connected to a MKS901. I have a different version with an analog input 29-Nov-20 06:50 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/image0-C8757.jpg 29-Nov-20 06:50 PM I would just recommend people to get a full range gauge 29-Nov-20 06:50 PM I mean these: 29-Nov-20 06:50 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/Bayard-Alpert_gauge-1C540.png 29-Nov-20 06:50 PM we have literally dozens in a cupboard. not being used anymore 29-Nov-20 06:51 PM Yeah I'm essentially making that but on a 7" screen with live-plotting @a_quiet_scientist 29-Nov-20 06:51 PM various exact models of course, but same thing. 29-Nov-20 06:52 PM The current would be really different between gauges I think, and manufacturers might not provide the calibration @idmb 29-Nov-20 06:52 PM Nah there's a standard design a bunch used 29-Nov-20 06:52 PM they're totally interchangable 29-Nov-20 06:52 PM and the different controls adjust depending on the filament mode (can be single or dual) 29-Nov-20 06:52 PM I think we have one reallllly old controller that requires a manual calibration 29-Nov-20 06:52 PM rather than automatically gauging it itself 29-Nov-20 06:54 PM I don't really have the motivation to make a universal ionization gauge controller for myself, but of course I'd welcome an open source design 29-Nov-20 06:54 PM I don't think there's much need tbh 29-Nov-20 06:54 PM I think the abundance of old controllers is greater than the desire to use them 29-Nov-20 06:55 PM Yeah nude ion gauges are on the way out, full range gauges are only $1000 new, and no one at a real lab will be buying a bunch of nude ion gauges anymore 29-Nov-20 07:00 PM LabView. Horrible LabView. The trouble is, the chemists and physicists never get any good training in the practices of good programming or software engineering. At all, ever. Version control? Git? Never heard of it. They just want to be able to easily program graphical interfaces to do what they want to do, and talk to ADC/DAC interfaces that they can buy. NI kind of gives them that. And nobody really develops anything better that meets their needs. These users are actually not experienced and not good at engineering, usually. I’d like to get them all using Python, but they don’t know how to integrate Python with ADC/DACs they can buy, and easily make GUIs, LabView is what they know so they go back to LabView. I’d like to get them using Arduino, but they don’t want to build firmware or build electronics, they usually just want something with some 0-10V in and 0-10V out, maybe some 5V I/Os, drivers that can drive a 50R load, easy terminal blocks and easy LabView integration. Arduino doesn’t give them what they want. 29-Nov-20 07:02 PM Wait what 29-Nov-20 07:02 PM The Red Pitaya seem to fit the need quite well, except for the programming and engineering part 29-Nov-20 07:02 PM physicists are HUGE users of python? 29-Nov-20 07:03 PM I think he means using Python to interface with hardware 29-Nov-20 07:03 PM So micro python, not just using Python to process data and plot things 29-Nov-20 07:03 PM and I've never been in a lab that didn't have a bunch of arduinos 29-Nov-20 07:03 PM one lab even has their own git server, which syncs their labview and matlab programs between their apparatus 29-Nov-20 07:03 PM The issue is that setting that up in a lab without... Who's gonna do it? 29-Nov-20 07:05 PM Maybe it’s just the ones I know. I think Python would be really good for them. And yes, they use Bayard-Alpert tubes with big old 2RU Varian readout boxes. 29-Nov-20 07:06 PM I think you're missing why people use labview 29-Nov-20 07:06 PM it's not because the gui is pretty 29-Nov-20 07:06 PM the dataflow style is perfect for most experiments 29-Nov-20 07:06 PM it's way faster to program simple things 29-Nov-20 07:07 PM they know how to use it and quickly stand up a working hardware-and-software set for their experiment needs. 29-Nov-20 07:07 PM Not even though 29-Nov-20 07:07 PM they're not born with prior knowledge or anything 29-Nov-20 07:07 PM it's super fast to figure it out 29-Nov-20 07:07 PM If someone went to the effort to set stuff up the right way, and had only students who had been trained to do things that way, all python would be awesome. Some labs kind of do that 29-Nov-20 07:07 PM but the point of labview is to not think about it 29-Nov-20 07:10 PM Here’s one @funranium will appreciate 29-Nov-20 07:10 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/image0-B63E8.png 29-Nov-20 07:10 PM hopefully an "or" 29-Nov-20 07:10 PM hopefully 29-Nov-20 07:11 PM LabVIEW NXG Web Module does look pretty nice. Hopefully I don't have to install 20G worth of NI software modules to make it useful 29-Nov-20 07:12 PM NXG is basically "fix a bunch of what's wrong with labview" but also "make everyone used to the old labview cry" 29-Nov-20 07:12 PM I think it's unlikely many already-established labs will switch to it... 29-Nov-20 07:13 PM Sounds perfect to the hobbyist at home then 29-Nov-20 07:13 PM Hopefully they will continue to support open source hardware 29-Nov-20 07:13 PM And roll it out for more platforms 29-Nov-20 07:14 PM It would be interesting if they went the teamviewer route 29-Nov-20 07:14 PM Amazing for home users, super expensive for commercial use 29-Nov-20 09:44 PM THAT IS NOT OKAY 29-Nov-20 10:08 PM I am tired of phone in microscope to take photo 29-Nov-20 10:08 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/DSC_2308-F5374.jpg 29-Nov-20 10:08 PM any tips/tricks of learning how to reverse a die ? 29-Nov-20 10:08 PM I know what it does, if that means anything 29-Nov-20 10:08 PM btw the chip was/is encapsulated in some soft clear silicone, hence a wrinkly look 29-Nov-20 10:48 PM i have a phone in microscope photo tip for you...3D printed spacers 29-Nov-20 10:48 PM then it is just a matter of centering up the camera and not as much of a hassle 29-Nov-20 10:50 PM well, I am moments away from clicking -buy- on the one APS-C camera I've been spouting about to shove into the toolmaker's microscope (which was what that shot was from, just through they eyepiece+phone) 29-Nov-20 10:50 PM the guy has been pretty responsive, I am going to ask him to measure 29-Nov-20 10:50 PM that, and there is an auction of one + some sort of lense, likely not usable for my distance, but still, ending in a few days 29-Nov-20 10:50 PM the unfourtenate thing about this chip that I photo'd is as far as I can search, it isn't made anymore 29-Nov-20 10:50 PM oh, and I have a dozen or so 'dead' ones 29-Nov-20 10:50 PM I would simply like to find a valid replacement, but I have a feeling there is some trickery going on 29-Nov-20 10:50 PM ie, when the voltage supply line goes low is when output occurs... I think 29-Nov-20 10:50 PM (this is a hall effect sensor from the vintage keyboard.. there's a few dead sensors) 29-Nov-20 10:54 PM Which camera did you end up pining over? 29-Nov-20 10:54 PM but yeah.. columns are activated LOW 29-Nov-20 10:54 PM oh, still the Sony QX1 29-Nov-20 10:54 PM Ah 29-Nov-20 10:54 PM I’ve seen some of the nex for like $50 here 29-Nov-20 10:54 PM But not as cute 29-Nov-20 10:55 PM it may be the perfect size to fit inside of my microscope's projection head 29-Nov-20 10:55 PM and I question then... do I need a lens on the actual camera? is it required for type-e mount? etc 29-Nov-20 10:55 PM also, pretty sure it's time for a movie.. was up very late last night.. but if anyone wants to link me to something like a tutorial of IDing parts of a die, that would be neat 29-Nov-20 11:01 PM only microscope cameras that I have used just replaced eyepieces or mounted onto a trinocular mount without any extra lenses/glass unless you wanted to filter things 29-Nov-20 11:01 PM ah, good to know 29-Nov-20 11:02 PM do not have any experience with the object of your desire but generally I do not think they use optics besides what is built into the cameras 29-Nov-20 11:03 PM Is there any way you can hold a card where the camera sensor would be? 29-Nov-20 11:03 PM And view it 29-Nov-20 11:03 PM Then have a VERY bright subject. See if you can see the projection on the card 29-Nov-20 11:04 PM Yes, that's somewhat what I've done already 29-Nov-20 11:04 PM Can you tell? 29-Nov-20 11:04 PM If there’s a projection you don’t need a lens 29-Nov-20 11:04 PM Well, only if the projection is the size of the sensor 29-Nov-20 11:04 PM If it’s smaller you need a lens 29-Nov-20 11:05 PM it may be the case where it is larger, by the time it gets to the sensor 29-Nov-20 11:05 PM depends on dimensions 29-Nov-20 11:05 PM if the thing will even fit inside or not 29-Nov-20 11:05 PM k, my eyes are saying: nope... catch y'all later 29-Nov-20 11:10 PM It might not focus well if you shift the sensor plane from where it’s designed to focus 29-Nov-20 11:10 PM And you don’t actually benefit from a larger sensor if you’re not actually getting more light 30-Nov-20 01:20 AM Oh man that BBOTE international shipping is expensive ... I was warned it would be I figure it generally makes sense to order at least 2x the shipping price worth of merchandise ... poor impulse control probably means I’m gonna end up spending a lot on coffee. But it’s really great coffee by all evidence and I want it 30-Nov-20 07:45 AM LabView: WHY? When you can use EPICS? 30-Nov-20 07:49 AM It’s easier, I promise 30-Nov-20 08:28 AM "We've already been using it for 40 years, why stop now?" 30-Nov-20 09:04 AM the opposite... "we can set it up in 4 minutes, why do the proper thing that takes 40?" 30-Nov-20 09:04 AM long term planning is not how academia goes 30-Nov-20 09:04 AM it'd be nice if it were 30-Nov-20 09:04 AM but that's not what gets rewarded 30-Nov-20 11:03 AM Does anybody have any experience in photoetching parts? I’m getting quotes for parts but the prices are excessive. 30-Nov-20 11:03 AM I’m guessing they cost with photoresists but is it like a regular litho process or some kind of like UV laser type of thing? 30-Nov-20 11:13 AM The price of BBOTE hasn't gone up at all in the decade I've been making it, as the agronomy of coffee means it tends not to get more expensive just that smaller farms vanish, but HOOBOY postage sure has. Shipping to Australia has never been cheap but it's just silly these days. 30-Nov-20 11:16 AM can confirm 30-Nov-20 11:16 AM I'll just wait for the man himself to bring it to me :P 30-Nov-20 11:32 AM Deliver some to Vancouver! 30-Nov-20 12:03 PM @Charles depends on how big or a run and even then there's a lot of different process/different types of tools that can be used, but a lot of vendors have to make a mask for every setup so cost is a bit high. I'm assuming you are talking about thin sheet metal parts here? 30-Nov-20 12:06 PM Correct. .005 nickel grid/mesh about 1.3 wide by 2.225 tall. 30-Nov-20 12:32 PM Before COVID a trip to both Germany & Canada had been on the books where I could have played coffee mule. Alas. 30-Nov-20 12:35 PM How effective is sanding w/ micron paper to expose further layers of a die? given I have practice 'flat polishing' to some degree 30-Nov-20 12:35 PM also, maybe this topic belongs in #semiconductor 30-Nov-20 01:24 PM @Charles what units were you referring to? 30-Nov-20 01:24 PM Microns? 30-Nov-20 01:24 PM mm? 30-Nov-20 01:24 PM Godawful thousandths? 30-Nov-20 01:24 PM Inches? 30-Nov-20 01:25 PM parsecs! 30-Nov-20 01:27 PM @Noxz I'd ask azonenberg 30-Nov-20 01:28 PM Depending on what kind of mesh size we are talking about I can see why it would be expensive 30-Nov-20 01:28 PM Only etched part I was involved in I had a pretty big feature size so I managed to do it at home 30-Nov-20 01:31 PM Also what feature size is important 30-Nov-20 01:31 PM If the dimensions given is millimeters, and the feature size above light wavelengths, a laser cut shop can probably just cut that directly 30-Nov-20 01:31 PM Inches too 30-Nov-20 01:32 PM I did a mask transfer process, but could have defenitly gotten better resolution doing an exposed mask 30-Nov-20 01:33 PM @nmz787 I recall him showing pics of a sanded/polished sideview, of the various layers.. but yeah, I was moreso just looking at a simple guide and whatnot 30-Nov-20 01:33 PM Also, I asked for proper dimensions of the camera I want for in the microscope 30-Nov-20 01:33 PM do most Steppers reduce the image ? like, are any 1:1 30-Nov-20 01:33 PM (for masks) 30-Nov-20 01:34 PM A lot are 1:1 30-Nov-20 01:34 PM aberations upon reduction? 30-Nov-20 01:35 PM You don't really need a stepper for most sheet metal parts 30-Nov-20 01:35 PM right, I guess I was out of context there 30-Nov-20 01:35 PM I am still interested in making silicon balance/hairsprings 30-Nov-20 01:35 PM and escapement parts 30-Nov-20 01:35 PM But in relationship to semiconductor 30-Nov-20 01:35 PM If you want to do maskles stepper then yeah you probably need reduction 30-Nov-20 01:36 PM nods 30-Nov-20 01:37 PM Just hack a microscope into one, you can even use it for alignment then 30-Nov-20 01:37 PM Yeah lotta steppers do reduction 30-Nov-20 01:37 PM right, especially with my toolmaker's microscope with the optical comparator/projection head, it's always been an interesting thought to stick something projecting back into the lens 30-Nov-20 01:37 PM Means you can make a mask with a larger process, evening/averaging out tolerances, then reduce it down with optics and a smaller wavelength light 30-Nov-20 01:37 PM @Charles I've had a bunch of laser made mask stuff demoed for me in the last 2 years or so, I don't think the resist is a big cost. The system is a big-ish capital expense. The etching is more "work" than spinning resist and hitting "go" on the projection system 30-Nov-20 01:37 PM Projection/laser vector/raster 30-Nov-20 01:40 PM e-beam litho will forever be on my list, till I either buy or build a SEM 30-Nov-20 01:41 PM E beam is slowwwww 30-Nov-20 01:41 PM maybe good for a master mask? 30-Nov-20 01:41 PM also, I'm talking about 100 watches a year 30-Nov-20 01:41 PM Eh, I got a 1 inch square done in like 9 e beam hours 30-Nov-20 01:41 PM At around 130nm feature size 30-Nov-20 01:42 PM PMMA ? 30-Nov-20 01:42 PM I think it was like $4k 30-Nov-20 01:42 PM Nah ZEP 30-Nov-20 01:42 PM All depends on feature size noxz 30-Nov-20 01:42 PM (honestly not 100% sure on cost) 30-Nov-20 01:43 PM I really need to get back into the vacuum deal.. now that school is done and my mind can wander a bit more 30-Nov-20 01:43 PM You might like a diy maskless setup a lot because you could really rapidly make new designs and it's the same process for one off and for 10 off 30-Nov-20 01:44 PM yeah, a few months back we were trying to figure out rigging the toolmaker's microscope for that 30-Nov-20 01:44 PM It's also a parallel process, so very fast 30-Nov-20 01:44 PM to do projection as well as camera in the same thing.. would need a ... what's it called? like a dichroic mirror to make btoh work at same time 30-Nov-20 01:45 PM Half silvered mirror 30-Nov-20 01:45 PM if t he size is larger than the viewing window 30-Nov-20 01:45 PM thanks 30-Nov-20 01:45 PM dichroic was close enough, you got it 30-Nov-20 01:45 PM A trinocular metallurgic microscope would be really well setup to do this 30-Nov-20 01:46 PM this showed up recently, https://www.ebay.com/itm/LEITZ-HEAT-TREATED-PARTS-STRUCTURE-VIEWER-MICROSCOPE/264368542564 30-Nov-20 01:46 PM and I am a fan of leitz stuff 30-Nov-20 01:46 PM Non inverted would be easier 30-Nov-20 01:46 PM I would get something newer 30-Nov-20 01:47 PM my toolmaker's microscope does have X/Y scales... 30-Nov-20 01:47 PM so, almsot no need to visually allign 30-Nov-20 01:47 PM ? 30-Nov-20 01:47 PM Optical Microscopes weren't really closed to optimized until the 80s 30-Nov-20 01:47 PM well, if a one-step mask thing, like making gears 30-Nov-20 01:47 PM otherwise some allignment target would be needed 30-Nov-20 01:48 PM So you will really notice a lot better optical performance from a system built after then 30-Nov-20 01:48 PM Also infinity corrected optics, or even just close to infinity corrected makes this way easier 30-Nov-20 01:48 PM Older scopes you will also have ghosting issues also caused by Iack of infinity correction 30-Nov-20 01:49 PM Even piecing together something with 3d printed parts and aliexpress infinity optics seems likely to get decent results 30-Nov-20 01:50 PM Yeah honestly 30-Nov-20 01:50 PM New optics are super easy to hack together 30-Nov-20 01:50 PM hrmm.... 30-Nov-20 01:50 PM so maybe keep toolmakers microscope as a QC station, and make something anew 30-Nov-20 01:50 PM Older objectives basically were only usable will the correction that happened in the rest of the microscope 30-Nov-20 01:50 PM New objectives do most if not all correction internally 30-Nov-20 01:51 PM https://github.com/OpenLabTools/Microscope 30-Nov-20 01:51 PM They used to have a website with pics 30-Nov-20 01:51 PM Have either of you seen the 3d printed flexture based microscopes? 30-Nov-20 01:51 PM Ooo yeah that's a nice upgrade 30-Nov-20 01:52 PM I have been milling stainless flexures lately 30-Nov-20 01:52 PM That open lab tools had a nice end to end design 30-Nov-20 01:53 PM Honestly though, if I had to guess at your resolution requirements a 5x objective might be enough if you used a 4k dlp chip 30-Nov-20 01:53 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/DSC_1816-0B2CC.jpg 30-Nov-20 01:53 PM Oh that's very cool 30-Nov-20 01:53 PM I forget the thickness of the blades.. 0.4mm? 30-Nov-20 01:53 PM I calculated what was needed 30-Nov-20 01:53 PM thanks to MIT professor's spreadsheets 30-Nov-20 01:54 PM What are the specs on the parts you are thinking of using litho for? 30-Nov-20 01:54 PM escape wheel is no larger than 10mm diameter, for ref 30-Nov-20 01:54 PM What the thickness of the stock? 30-Nov-20 01:54 PM Wet etch you are limited in aspect ratio 30-Nov-20 01:55 PM 500nm max 30-Nov-20 01:55 PM Minimum feature width? 30-Nov-20 01:55 PM wait 30-Nov-20 01:55 PM microns? 30-Nov-20 01:55 PM sorry, goofed there 30-Nov-20 01:55 PM half a mm 30-Nov-20 01:55 PM I really dont have much of th ese dimensions on hand/designed yet 30-Nov-20 01:55 PM it would be nice to have sharp corners here and there, but what is 'sharp'? 30-Nov-20 01:56 PM If you do the mask on both sides then you can go a lot higher 30-Nov-20 01:56 PM oh, that makes sense 30-Nov-20 01:57 PM And then you can do only one side etch on some areas in the same step 30-Nov-20 01:57 PM the main paper I've looked into was iPrOH as a surfactant with KOH, low temp, slow etching, but good sidewalls 30-Nov-20 01:57 PM https://people.eecs.berkeley.edu/~pister/147fa15/Resources/Brockmeier12.pdf 30-Nov-20 01:57 PM Yeah etch chemistry is a big deal 30-Nov-20 01:57 PM I've only got experience in tungsten so I can't really speak to other chemistries 30-Nov-20 01:57 PM And even then I was doing electro etching so most of what I was playing with was electrical parameters 30-Nov-20 01:57 PM But no I'd say you can totally build a cool maskless etch process that would be great in the quantaties you are talking about 30-Nov-20 01:59 PM And you could move up to dry etch ;p 30-Nov-20 01:59 PM great - I think there is the problem of: hack together what you have to make it work 30-Nov-20 01:59 PM heh, if I could easily do DRIE than I may 30-Nov-20 02:00 PM Dry etch on .5mm ew 30-Nov-20 02:00 PM All the metal has to go somewhere 30-Nov-20 02:00 PM if wet etching works then I'd go with it, and yeah, that paper is my main ref of what is possible with not anything fancy 30-Nov-20 02:01 PM Well dry etch just gives better aspect ratio 30-Nov-20 02:01 PM but so long as I am not really stuck thinking I need to use the toolmaker's microscope to expose the mask, then that fixes a few problems 30-Nov-20 02:01 PM Wire EDM might be appropriate too 30-Nov-20 02:02 PM Or just edm 30-Nov-20 02:02 PM hah... yeah... wire edm would also make nice flexures 30-Nov-20 02:02 PM k, I have a few things left on the list to do today, including giving the dog a bath after this walk 30-Nov-20 02:04 PM Have fun 30-Nov-20 02:04 PM nice day... starting tomorrow it shouldnt rain for a week, so back to doing exterior house work (siding) 30-Nov-20 03:31 PM turned into a hike 30-Nov-20 03:47 PM @Noxz how practical is this as a business model? 30-Nov-20 03:47 PM Mechanical watches are a kind of anachronism.... Now there are certain luxury connotations. So having a Rolex, Breitling, Omega, Patek Philippe, etc. is a huge status symbol. 30-Nov-20 03:47 PM But are there people out there who would appreciate watches made by independent designers that don’t have brand recognition? 30-Nov-20 03:47 PM My gut feeling says this is a hard market to get into.... 30-Nov-20 03:51 PM yeah, but most of their business models are very few watches a year 30-Nov-20 03:51 PM so, nearly eveyrone in the industry is there because they are established.. but if they only make a dozen watches a year [with a team of people] then how far is the reach? 30-Nov-20 03:51 PM finding the right pricepoint +quantity [$/effort] is key 30-Nov-20 03:51 PM it's so niche that people that only make a dozen a year already have people paid in full for watches on a waiting list, yearsin advance 30-Nov-20 03:51 PM getting attraction is number one.. you can easily pay for advirtisement blogs and whatnot 30-Nov-20 03:51 PM that would be the simplest 30-Nov-20 03:51 PM but, also because the US making market is so s mall, most of those blogs would come visit you for free to do the interview upon launch 30-Nov-20 03:54 PM Like me and gem faceting. Yes, gemstones are a luxury item. But few people care about the artistry of the cut of the gemstone. They just care how big it is. So not that many people would pay a premium for an artisanal cut stone when they can buy a bigger stone cut in a sweatshop in India. 30-Nov-20 03:54 PM baguet cut is my fav 30-Nov-20 03:54 PM baguette 30-Nov-20 03:54 PM but yeah, you will find people who just buy watches as teh status thing, dont care about the nuances of it, etc 30-Nov-20 03:54 PM LOTS of people who take their chronographs into a service shop will ask how the buttons work 30-Nov-20 03:54 PM and they've had it for years 30-Nov-20 03:54 PM but then you have people who can recite all the neat tehcnical materials used in ea part of some watch 30-Nov-20 03:56 PM A watch I’m lusting after: 30-Nov-20 03:56 PM so, simply because it's so niche, if preenting a product that is true to the art should likely be enough to get enough recognition 30-Nov-20 03:56 PM https://www.ablogtowatch.com/interview-richard-hoptroff/3/ 30-Nov-20 03:57 PM but yeah, I can easily (so long as I have the money) pay for an ad on ablogtowatch or hodinkee/etc 30-Nov-20 03:57 PM and so long as the pricepoint is acceptable, it should get enough traction 30-Nov-20 03:57 PM I think independant watchmakers have their pieces priced so high that they are unobtainable for many consumers 30-Nov-20 03:57 PM so, I have a goal to keep that down 30-Nov-20 03:57 PM this is one of the best sources of independants: https://www.ahci.ch/members/ 30-Nov-20 03:57 PM Konstantin Chaykin, who was/is the president of it currently? is actually who made me re-evaluate price point, as his Joker watches start at like 8k (although based on an eta movement, there is a lot of inhouse stuff ontop of it) 30-Nov-20 03:57 PM ah, looks like it is 13k EUR currently.. but he started it off lower 30-Nov-20 04:07 PM Interesting stuff. 30-Nov-20 04:07 PM examples of prices: https://www.chrono24.com/konstantinchaykin/prices-for-watches--new.htm?goal_suggest=1 30-Nov-20 04:07 PM limitted runs of every color, etc 30-Nov-20 04:07 PM it's not quite artificial scarecity like Rolex imposes 30-Nov-20 04:07 PM but... if this watch thing doesnt work out.. I'll likely rejoin IT 30-Nov-20 04:07 PM if I need to 30-Nov-20 04:07 PM it helps that I am somewhat still in a bachelor mode, ie, no family to support 30-Nov-20 04:07 PM I certainly have some time to test the waters, see if the product I feel comfortable releasing appeals to the right number of people or not 30-Nov-20 04:12 PM I love his Mars watch. 30-Nov-20 04:12 PM I gave my wife a “watch” I made. 30-Nov-20 04:12 PM https://www.adafruit.com/product/950 30-Nov-20 04:12 PM But I programmed it so it had Mars time modes. 30-Nov-20 04:14 PM I have a desire to make my own quartz IC in the future 30-Nov-20 04:15 PM I defaulted it to the Mars time, and I set it to match with earth time when I gave it to her. 30-Nov-20 04:15 PM Then I waited for her to see it drift and figure it out. 30-Nov-20 04:15 PM evil! 30-Nov-20 04:16 PM People on the JPL Mars rover teams typically had to live on Mars time, so they got custom watches. 30-Nov-20 04:16 PM nice 30-Nov-20 04:17 PM She was reading about that. So I made her one. 30-Nov-20 04:17 PM Then I flashed new firmware that would default to earth time but had buttons for Mars Coordinated Time and the mission clocks for Spirit, Opportunity, and Curiosity. 30-Nov-20 04:17 PM I suppose I’ll need to update it with Perseverance. 30-Nov-20 04:17 PM Unfortunately it was a coding nightmare. I needed double precision floating point to stay accurate to within a second. 30-Nov-20 04:17 PM And pulling in those library functions killed my performance. I really should have used integer approximations. 30-Nov-20 04:34 PM @rdpierce so what was the concern again? if there is big enough demand for a new guy in a niche market? 30-Nov-20 04:40 PM Yeah. But I don’t know the market and you do, so I figure you’d be able to explain how this would work. 30-Nov-20 04:40 PM there is more demand than there is supply, if that says anything 30-Nov-20 04:40 PM Also, I’m curious how you got design training. By that, I’m talking about the art side. I imagine the schools teach you how to repair and assemble watches, not how to design them. 30-Nov-20 04:41 PM right, art is not taught, heh 30-Nov-20 04:41 PM my mother is an artist, I grew up going to art shows, vending her stuff, etc.. so I was all around it, I do not have a design degree or whatever 30-Nov-20 04:41 PM you find very few examples of a well designed movement, imho 30-Nov-20 04:41 PM like, something that actually looks pretty, not just nice finishing 30-Nov-20 04:41 PM this is on of the better examples I know of: https://astrehler.ch/papillon-dor/ 30-Nov-20 04:41 PM most dials from voutilainen are nice 30-Nov-20 04:41 PM th ere is a bit of tradition and: how else are you supposed to do it, attitude 30-Nov-20 04:41 PM before something becomes impractical 30-Nov-20 04:44 PM Oh wow. 30-Nov-20 04:44 PM You can do that? Do you have a portfolio of designs? 30-Nov-20 04:45 PM my first project will be fairly traditional, the second will be essentially a clone/remake of a vintage chrono.. 3rd on the list will be a from scratch design 30-Nov-20 04:45 PM it's mostly just doodles at the moment, hah 30-Nov-20 04:45 PM I am still spending most of my time on the technical side 30-Nov-20 04:45 PM function over form... because if it functions, then it is beautiful 30-Nov-20 05:48 PM heh, maybe if I knew how to do a continuity test correctly I wouldn't have mixed up gnd and Vcc of those hall effects 30-Nov-20 06:06 PM the operation is still perplexing, heh 01-Dec-20 09:58 AM https://mobile.twitter.com/davidbegnaud/status/1333746725354426370?s=21 01-Dec-20 10:18 AM Awwww damn 01-Dec-20 10:18 AM https://cdn.discordapp.com/attachments/513191263894372352/783378143703728138/EoKUSLGVkAAFmK2.jpg 01-Dec-20 10:18 AM https://media.discordapp.net/attachments/513191263894372352/783378140357197904/EoKUSJzVoAApMvf.jpg?width=1048&height=588 01-Dec-20 10:18 AM Yeah it's done for 01-Dec-20 10:44 AM They should reuse it as an awesome skate park now 01-Dec-20 01:58 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/z66vyq5k0m261-A92C8.png 01-Dec-20 03:23 PM rip 01-Dec-20 05:16 PM when someone says 'nuclear submarine' .. does that mean powered by, or armed with ? 01-Dec-20 05:17 PM https://tenor.com/view/the-road-to-el-dorado-both-both-is-good-gif-8304204 01-Dec-20 05:19 PM Other than north Korea is anyone fielding diesel boats with nuclear weapons on them? 01-Dec-20 05:21 PM I think everyone wishes not even they were doing that... I hope nobody else is. 01-Dec-20 05:32 PM Not...anymore. 01-Dec-20 05:49 PM I wonder if the US has subs with nukes 01-Dec-20 05:49 PM so as Russia 01-Dec-20 07:05 PM I mean, yes. There are the trident submarines 02-Dec-20 04:05 AM Don't also UK, France and China have subs with nukes? 02-Dec-20 04:05 AM I'm unsure about India 02-Dec-20 04:06 AM uk for sure 02-Dec-20 04:06 AM france maybe, china no idea 02-Dec-20 07:46 AM No time for science, only doge 02-Dec-20 07:46 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/image0-5671F.jpg 02-Dec-20 10:59 AM Most countries rely on subs. Can't be targeted. Survivable second strike capability. 02-Dec-20 10:59 AM The US is idiotic enough to advertise to the world "Please target the following 500 locations with your nukes. Use ground burst because they are hardened targets. And you have an incentive to nuke us first so we can't use them against you. Oh, and because they are vulnerable, if you even look at us funny and our early warning systems malfunction, we will launch because the alternative is losing them." 02-Dec-20 10:59 AM ICBMs are so quaint and backwards. I guess we can start considering them Cottagecore. 02-Dec-20 10:59 AM And... Asking for a friend: 02-Dec-20 10:59 AM I come here to ask the electrical design gurus. I'm looking for software that we can use to collaborate on the design of several PCBs. Currently, we've used Autodesk Eagle which integrates with Fusion 360, but I've found that the Eagle side is not very collaborative. Actually, it's not collaborative at all. It fails in two main things that I dislike: 1) it doesn't allow you to upload your eagle files to any cloud so that another user can work on them - each user has to share the files and store them locally to access the design of the PCB. 2) Eagle has a terrible way of searching for electronic/connector parts. One literally has to leave the software, go on a search browser and look for a part, and If you get lucky, you'll find there is a library that has been created for the part. It's even worse if you're looking for a component with multiple ICs, such as custom charging boards like those that we use in GONet. So for this reason, I'm looking for software that meets the following criteria: Has a Free Version macOS X, Linux, Windows Friendly Is collaborative between multiple users, and capable to edit while other users and making modifications. (Altium CircuitMaker is a good solution for this, but I haven't tested - It's also not Mac Compatible) Easily capable of finding parts (including custom parts, which are created by contributors), all within the same program. Essentially not requiring any browser search to find a part. (EasyEDA seems to be a good solution here) Integrates well with 3D CAD software so that the design of the board layout is easily represented on the CAD side. (Eagle seems to be good for this) Files are easily download-able and use the most common software filetypes. (Eagle uses .sch and .brd, while Fusion360 uses .step and are all good file formats which can be read by most software.) 02-Dec-20 10:59 AM I know this is a big ask, and even a bigger ask when I say I'm looking for a solution within the week. So far, here is some research on this. And I'm still contemplating using EasyEDA. Check it out if you haven't. 02-Dec-20 11:03 AM Doesn't Russia, China, Pakistan and India also have ICBM's? 02-Dec-20 11:03 AM Collaborative design between multiple people on PCB's is genuinely a hard problem 02-Dec-20 11:05 AM Russia does to counter US threats. 02-Dec-20 11:05 AM We "solved" that at work by assigning subsheets to people and so on, but it still worked weirdly 02-Dec-20 11:05 AM Reportedly Mentor Graphics PADS can do colloaborative design well, but I have never done it 02-Dec-20 11:05 AM China primarily relies on IRBMs. They're primarily worried about regional conflicts. 02-Dec-20 11:05 AM Israel has subs. 02-Dec-20 11:05 AM UK exclusively has subs and the famous "letter of last resort" 02-Dec-20 11:06 AM And that thing about parts and libraries is normal. It is expected that you do all your component models and footprints yourself, or your company has an internal library maintained by someone who's job it is to do so. 02-Dec-20 11:06 AM the eagle .sch and .brd can only be read by other software because they bothered to make importers for it. There are no universal pcb design file formats out there. 02-Dec-20 11:06 AM Maybe outside of ascii netlists 02-Dec-20 11:06 AM And the problem with component libraries made by people other than you or your organization is that there can be mistakes, sometimes subtle one's. 02-Dec-20 11:06 AM And the parameters rarely fit the format of your company 02-Dec-20 11:06 AM I have had subtle mistakes in parts libraries downloaded from Altium.com and direct from manufacturers 02-Dec-20 11:09 AM Worried about? Or threatening them? 02-Dec-20 11:09 AM Like an RJ45 connector's footprint missing some holes needed to mount it. 02-Dec-20 11:09 AM All libraries should be check for accuracy before use, as always :P 02-Dec-20 11:10 AM Yep 02-Dec-20 11:10 AM But that was subtle 02-Dec-20 11:10 AM as there was a variant without those holes 02-Dec-20 11:10 AM Subtle enough for a board to go to manufacture 02-Dec-20 11:10 AM And by the time you verify a footprint, you would have done it with a wizard anyway. 02-Dec-20 11:10 AM Outside of stuff like connectors 02-Dec-20 11:10 AM Oh yes 02-Dec-20 11:10 AM And then "wait, why can't we mount it properly on the board?" 02-Dec-20 11:10 AM Yep 02-Dec-20 11:10 AM I think think they said along the lines of "We had some production line workers cut these things off with scalpels, but please fix the boards before that larger production run." 02-Dec-20 11:14 AM You remind me of a friend - made mistakes with resistor and capacitor footprints 02-Dec-20 11:14 AM Selected 0805 SMD packages 02-Dec-20 11:14 AM board goes to fab, comes back 02-Dec-20 11:14 AM "wait why does the footprint look smaller than my resistors" 02-Dec-20 11:15 AM :DDDDDDDDDDDDDD 02-Dec-20 11:15 AM imperial vs. metric strikes again 02-Dec-20 11:15 AM Put in 0603 metric on one board 02-Dec-20 11:15 AM soldering those protos sucked 02-Dec-20 11:16 AM Amusingly bossman likes price breaks and spools 02-Dec-20 11:16 AM So I put in an order for 20pcs 10k, 20pcs 1k, 30pcs 100nF 10V 02-Dec-20 11:16 AM Proceed to get 20k 10k, 20k 1k, 3k 100nF 10V, all in 0201 02-Dec-20 11:16 AM "tf I'll do with this stuff" 02-Dec-20 11:18 AM DPRK uses road mobile launchers for ICBMs and IRBMs that are distributed throughout the country and can hide out in underpasses. They can't be effectively targeted. 02-Dec-20 11:18 AM and they're trying to get SLBM capability and probably have it to a limited extent. 02-Dec-20 12:45 PM @rdpierce #1 seems solvable with dropbox... Otherwise I'd recommend KiCad 02-Dec-20 01:44 PM Also, having a discussion with my wife about whether ICBMs qualify as cottagecore. 02-Dec-20 01:44 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/image0-4DC56.png 02-Dec-20 01:44 PM Totally cottagecore. All that obsolete nostalgia. 02-Dec-20 01:44 PM Her: “But they’re not COZY!” 02-Dec-20 01:48 PM But yeah, at least for schematic capture KiCad + subsheets + git could be a usable combo 02-Dec-20 01:48 PM as kicad files are not binaries like altium, but ascii text. 02-Dec-20 01:48 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/image0-CB0E2.jpg 02-Dec-20 01:48 PM Which git should merge and handle gracefully. Along with making sane deltas. 02-Dec-20 01:49 PM This is where the Missile Combat Crew stores their Bitcoin wallet. “Secret Crypto”. 02-Dec-20 01:53 PM lol 02-Dec-20 01:54 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/image0-F3165.jpg 02-Dec-20 01:54 PM loo how happy he is 02-Dec-20 01:54 PM What’s more cottagecore than a knit wool sweater and the large triangular mechanical switch that ends the world? 02-Dec-20 01:54 PM That’s me, if you can’t tell. Very happy to cross this place off my bucket list. 02-Dec-20 01:54 PM And the rotary dial telephone. How quaint. Totally cottagecore. 02-Dec-20 01:58 PM I'd absolutely live there 02-Dec-20 03:04 PM Buying a decommissioned silo seems like it would be all kinds of fun if you had the money to fund the restoration 02-Dec-20 03:04 PM Talk about stuff you dream about doing if you win the lotto or something hehe 02-Dec-20 03:07 PM also money to get rid of tons of asbestos I bet 02-Dec-20 03:14 PM Unfortunately when they decommission them they take most of the fun stuff out. 02-Dec-20 03:14 PM There’s plenty of video on YouTube of people opening up old silos. 02-Dec-20 04:41 PM I meant restoration as in to livable conditions not restoration as new. Sorry for the lack of clarity there 02-Dec-20 04:41 PM Most all of them need to be actively pumped to keep the bottom of the silo from filling with water and they were also back filled partly with rubble in a lot of cases from what I saw when I was really interested in that subject a few years ago 02-Dec-20 04:44 PM A lot of house basements need a sump pump too 02-Dec-20 04:50 PM If you have $500K sitting around both of these actually look in pretty decent shape? https://www.redfin.com/AZ/Oracle/63514-Arizona-77-85623/home/170267569 https://www.zillow.com/homedetails/980-N-Sibyl-Rd-Benson-AZ-85602/2081494406_zpid/ 02-Dec-20 04:50 PM Lot better shape than the one I saw for sale a few years ago 02-Dec-20 06:41 PM That second one has a lot more of the original equipment. 02-Dec-20 06:41 PM That’s a good deal. 02-Dec-20 06:41 PM I want one. 03-Dec-20 02:00 AM OK, so what on earth is this reference going around about SNM being put into one’s bottom? Is this a real story? I want details. 03-Dec-20 02:02 AM well 03-Dec-20 02:02 AM it all started with a bit of beryllium sheet metal and a hacksaw 03-Dec-20 02:02 AM but don't worry, they were safe, because some WD40 kept down the dust 03-Dec-20 02:02 AM and next time they'll use a dust mask 03-Dec-20 02:02 AM then it somehow went to HF 03-Dec-20 02:02 AM https://twitter.com/Loberd3/status/1333990968165593090 03-Dec-20 02:02 AM I am still trying to reconstruct what happened 03-Dec-20 02:07 AM But how’d it go to uranium and why am I looking at the pins on the end of triga fuel elements weirdly now 03-Dec-20 02:08 AM googles how triga fuel lools 03-Dec-20 02:08 AM oh. 03-Dec-20 02:10 AM I’m sorry 03-Dec-20 02:11 AM my poor innocent soul 03-Dec-20 02:11 AM cough 03-Dec-20 02:38 AM The pictures I find don't make it look particularly seductive, I guess one just has to have a thing for fuel elements? 03-Dec-20 02:39 AM it's about the mechanical connector at the end 03-Dec-20 02:39 AM which looks a bit like a 6.3 mm audio jack 03-Dec-20 02:40 AM ah 03-Dec-20 03:31 AM It seems like everything good in “The Art of Electronics” is in the X-chapters 03-Dec-20 03:32 AM yep 03-Dec-20 03:47 AM Not 100% sure what this is for... manual vent valve ? 03-Dec-20 03:47 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/image0-2B6F8.jpg 03-Dec-20 03:47 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/image1-CF9CB.jpg 03-Dec-20 03:47 AM The top has a big square wrench socket 03-Dec-20 03:48 AM vent? Looks like a regular angle valve 03-Dec-20 03:51 AM Between the bottom 1.33” part and the side 1.33”? Yeah but I didn’t think the screw was going in far enough to reach that part. 03-Dec-20 03:54 AM oh, huh 03-Dec-20 04:25 AM Maybe a valve I suppose? The 6 screws are not actually holding a flange together, they provide adjustable off-Center force on the inner part. 03-Dec-20 04:25 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/image0-471C2.jpg 03-Dec-20 04:25 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/image1-4ADE0.jpg 03-Dec-20 04:25 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/image2-70D6E.jpg 03-Dec-20 04:33 AM it sure looks like a valve 03-Dec-20 08:44 AM https://twitter.com/DeborahTiempo/status/1334530900655304706 03-Dec-20 10:13 AM Really sad to see something that's still scientifically relevant blow up like that just because they skimped on maintenance :/ 03-Dec-20 10:15 AM Well a lack of maintenance isn't really the root cause, they just didn't know the cables' load rating deteriorated by almost half and once one cable snapped, there's no safe way to fix it anymore 03-Dec-20 10:15 AM But it only got there because of a lack of maintenance 03-Dec-20 10:15 AM They knew the cables should have been replaced a while ago 03-Dec-20 10:15 AM I think it was 04 when it was recommended 03-Dec-20 10:15 AM But they didn't do it 03-Dec-20 10:15 AM And then they did an inspection this year and it was toast 03-Dec-20 10:17 AM Did they do an inspection this year before the first broken cable? 03-Dec-20 10:18 AM The one in August? Not sure 03-Dec-20 10:18 AM If the original FOS was trusted, there was no good reason to replace all of these cables, it would be a huge task 03-Dec-20 10:20 AM Yeah my understanding was that it was not so much skimping on maintenance as it was a few different issues all coming together at one time. Lack of funding, structural stability estimates that were far higher than reality, and the cable snap...then more estimates using the old numbers that they did not realize were as detached from reality as they were 03-Dec-20 10:22 AM I guess more detailed inspection may have saved the telescope, but it was more of an engineering problem with trusting old numbers... Also I'm not sure the NSF/USF would have the funding to actually do a cable overhaul on the telescope if issues were found 03-Dec-20 11:26 AM @Mason_Yu https://forums.ni.com/t5/LabVIEW/Our-Commitment-to-LabVIEW-as-we-Expand-our-Software-Portfolio/m-p/4101878?profile.language=en#M1182636 03-Dec-20 11:31 AM So the NXG features will still stay within the community edition of labview right? 03-Dec-20 12:00 PM Ugh, the auction for a gate valve (that I won) was listed originally as being like a 30 minute drive from me, turned out that only three items in the auction were that close, the others were a 10-hour drive in California... Now I'm not sure I want to deal with shipping 03-Dec-20 12:00 PM I'm glad now that all the original items I bid on I didn't win, because I'm sure it would be a lot tougher to back out of winning close to a thousand or more dollars worth of items... Versus just 150 03-Dec-20 01:02 PM They're keeping the NXG features, but changing some UI / workflow stuff, is how I read it 03-Dec-20 01:02 PM or rather, no longer updating that separate branch of UI/workflow 03-Dec-20 01:08 PM Did you bid on one of those auctions out of Gilroy, CA? 03-Dec-20 01:08 PM I don't really care what the specific UI/workflow is, because I have to re-learn LabView anyways since the last time I used it was more than 3 years ago for a class. As long as it is free and interfaces with open source hardware, I will give it a try 03-Dec-20 03:00 PM @Mason_Yu it says San Jose 03-Dec-20 03:00 PM The main auction announcement said Wilsonville Oregon 03-Dec-20 03:02 PM https://edispositions.nextlot.com/public/sales/90906/lots?utm_campaign=website&utm_source=sendgrid.com&utm_medium=email 03-Dec-20 03:02 PM More stuff out of San Jose 03-Dec-20 03:02 PM Maybe it would be worth it to ship/road trip if you just get more? 03-Dec-20 03:02 PM Mmm pretty much the only reason I bid was because I could just drive locally 03-Dec-20 03:02 PM Thought I could anyway 03-Dec-20 03:02 PM I think they updated the auction listing after it began 03-Dec-20 03:02 PM I am actually getting a shipping quote right now, but also the auctioneer said they would cancel my invoice... Not sure if that would blacklist me from the site or not though, which I would prefer not to do 03-Dec-20 03:02 PM I really need to get a bigger lab before pulling in a whole bunch of equipment that I'd like to get for the long run 03-Dec-20 03:02 PM My wife would be really really unhappy if I brought home many many square feet of new equipment 03-Dec-20 03:05 PM My little one bedroom apartment's living space has been reduced to a desk and a bed 03-Dec-20 03:05 PM It's so expensive to rent out a small space where I am 03-Dec-20 03:05 PM So I just have to live among the equipment 03-Dec-20 03:05 PM Just turned part of the bathroom into a stockroom for aluminum and steel 03-Dec-20 03:07 PM Lol, not sure if I should feel happy or scared 03-Dec-20 03:07 PM Actually that listing is also a split listing 03-Dec-20 03:07 PM "Lots 50 to 114 Are located at 1­8912 North Creek Parkway, Suite 100, Bothell, WA 98011" 03-Dec-20 03:07 PM The rest in San Jose 03-Dec-20 03:19 PM Yeah it's really strange, in the other auction that specifies all lots are located in Gilroy, I can clearly see there are identical eBay listings of items which are located in Ohio and other places all over the country 03-Dec-20 03:19 PM So it's worth double-checking if the item is in fact nearby I guess 03-Dec-20 03:26 PM Yeah unfortunately I already confirmed the items I bought are in California 03-Dec-20 06:06 PM https://vm.tiktok.com/ZMJ4vM9xn/ 03-Dec-20 06:06 PM I’m... questioning if this is a good idea. 03-Dec-20 06:11 PM why does a canadian 03-Dec-20 06:11 PM use f 03-Dec-20 06:11 PM The "this is nightmarishly unsafe, but not sure if any safety gear on the market could fix that" way of questioning? 03-Dec-20 06:39 PM ...this is such a horrifically bad idea assuming that's the plasma lightsaber one 03-Dec-20 06:46 PM I would tolerate it if it was only ever mounted on a to scale general grievious 03-Dec-20 06:47 PM Or rather a giant propane torch 03-Dec-20 06:47 PM Handholding that is crazy 03-Dec-20 06:47 PM It changes colour too. 03-Dec-20 06:49 PM Well yeah, but that's easy. Just metal salts 03-Dec-20 06:49 PM Though honestly this might be less dumb than their lightsaber fight with red hot pieces of metal. 03-Dec-20 07:28 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/image0-29559.jpg 03-Dec-20 08:12 PM Lol Medhi made that joke in his video 03-Dec-20 10:31 PM Hmm, I feel like they should have held the metal to cut in the vice, and hand held the saber 04-Dec-20 07:09 AM anyone have a list of good vaccum/laser/optics/hackery/etc twitter accounts to follow? I stepped away from Twitter a few years back (got burnt out by work-related stuff) and want to reboot my lists with fun project-related folks I have a few of the usual suspects like Ben Krasnow already 04-Dec-20 07:11 AM Doesn't like half the gang here post on twitter? 04-Dec-20 07:11 AM yeah i mostly want y'all's twitters 04-Dec-20 07:20 AM https://twitter.com/GigaBecquerel 04-Dec-20 09:50 AM https://mobile.twitter.com/norklemcdorkle 04-Dec-20 11:14 AM mine is mostly just queer radiation stuff but I like to think it's interesting. https://twitter.com/belaokmyx 04-Dec-20 11:20 AM i have no desire to go near radioactivity ever again, so I'll live vicariously through your twitter! 04-Dec-20 11:22 AM again? 04-Dec-20 11:24 AM worked with radio-labeled RNA when i used to work in a bio lab. pretty mild as far as radioactivity goes i believe, but still gave me the heebie jeebies each time i went near it 04-Dec-20 11:24 AM ahh 04-Dec-20 11:24 AM I mean it's not open core reactor level stuff, but far from "pretty mild" 04-Dec-20 11:27 AM yeah guess I don't really have a good gauge of where it falls on the spectrum, only time i've really been around something like that. they just trained us up and we tried not to spill it... or stand next to it for too long 04-Dec-20 11:30 AM looking back, the work I did with lentiviral vectors was probably way more dangerous to my health but that doesn't arrive in the mail in a big lead bucket so you don't really think about it as much 04-Dec-20 11:32 AM at least that can't hurt you at a distance 04-Dec-20 11:51 AM tore apart a piece of very expensive equipment 04-Dec-20 11:51 AM RF Cable and Antenna Analyser 04-Dec-20 11:51 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/20201205_012304-D1DA3.png 04-Dec-20 11:51 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/unknown-C4FC7.png 04-Dec-20 11:51 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/20201205_004824-238D7.png 04-Dec-20 11:51 AM This is the digital board 04-Dec-20 11:51 AM Top-side 04-Dec-20 11:51 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/DSCF2131-ABDA7.png 04-Dec-20 11:51 AM Bottom side 04-Dec-20 11:51 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/20201205_012933-0A82E.jpg 04-Dec-20 11:51 AM see that metal rectangle thing there? 04-Dec-20 11:51 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/20201205_013102-7EA81.jpg 04-Dec-20 11:51 AM If you haven't realized by now 04-Dec-20 11:51 AM there's no applications processor here 04-Dec-20 11:51 AM almost every darned thing that is digital 04-Dec-20 11:51 AM is implemented in a FPGA or CPLD 04-Dec-20 11:51 AM at some point in the design stage they decided that that's the best way to go 04-Dec-20 11:51 AM and yes - I voided any form of cal on this 04-Dec-20 11:51 AM this analyzer has a corrupt firmware 04-Dec-20 11:51 AM for whatever reason, one day it wouldn't boot anymore 04-Dec-20 11:51 AM and this is still under warranty 04-Dec-20 11:51 AM so I am sending this back for repairs 04-Dec-20 11:51 AM I cri 04-Dec-20 11:51 AM This is my own personal analyser and it cost quite a fair bit lol 04-Dec-20 11:51 AM at least I got a chance to take a crack at it before I send it back 04-Dec-20 02:11 PM I mean if you want radiation and laser safety ranting, history grumbles and such there’s always me. https://twitter.com/funranium 04-Dec-20 02:12 PM lots, and lots of grumbles 04-Dec-20 03:40 PM finally pinged Amazon about that phone return.. the refund status said they hadn't received the item yet UPS tracking says they got it on the 24th, anyways, it's a: ohh, yes, tracking does say we got it.. so that's essentially resolved.. a few more weeks for a proper US model to be released, and we'll compare features again 04-Dec-20 03:40 PM funny thing.. when UPS came to pickup the phone the tracking number he gave me nearly blew away with the wind.. but luckily some vines caught it and I was able to pcick it up, but there was so much of me being like: meh, they'll get it and everything will be okay 04-Dec-20 03:40 PM glad I picked it up and kept it 04-Dec-20 03:56 PM Ugh, shipping quote from moveit.com is $647 to my house 04-Dec-20 03:56 PM $617 to a local business, or $520 to a terminal in Portland 04-Dec-20 03:56 PM For $150 of stuff... I'm on the brink of asking for a refund 04-Dec-20 03:56 PM Unless someone in here feels like reshipping for me from San Jose 04-Dec-20 05:25 PM [nods] My brand is strong. 04-Dec-20 05:44 PM Nice little SWR bridge thingy at the bottom there, Hittite chips, nice MiniCircuits mixers, lots of gain blocks, nice oscillator modules 04-Dec-20 05:44 PM Huh... GPS module? As a frequency standard. And by “cable and antenna analyser”, what does that mean? Like, a 2-port VNA right? Or a VNA that only has 1 port? Or a TDR? 04-Dec-20 05:48 PM VNA but one port @a_quiet_scientist 04-Dec-20 05:48 PM Does TDR but also S11 04-Dec-20 05:49 PM Cool 04-Dec-20 05:49 PM @polyfractal https://twitter.com/lukeweston 04-Dec-20 06:51 PM woo thanks @funranium @a_quiet_scientist ! 04-Dec-20 07:02 PM oh wait that's you? 04-Dec-20 07:02 PM whatever reason that hadn't clicked in my head 04-Dec-20 07:39 PM Yeah it is 04-Dec-20 07:41 PM I’m glad Twitter has a science community and it’s not just researchgate and orcid/linkedin 04-Dec-20 07:42 PM There’s sometimes weird things that go on in the LANL newsletters, Actinide Research Quarterly etc. Like “should we get B61 Life Extension Program branded masks?” “Yeah absolutely we should! They’re the bomb!” 04-Dec-20 07:42 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/image0-0665A.png 04-Dec-20 11:38 PM Yep. That happens. 05-Dec-20 06:49 AM Re: Twitter 05-Dec-20 06:49 AM https://twitter.com/ryanpierce_chi/ 05-Dec-20 06:49 AM Primarily making/hacking. Old crypto machines. Radiation instruments. General aviation. 05-Dec-20 04:42 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/Screenshot_20201205-164118-D88C4.png 05-Dec-20 07:26 PM [wipes tear] Moth memes. Something pure from a better time. 06-Dec-20 12:03 AM oh man i found the video https://photos.app.goo.gl/FK1TxakpntAh5Pu7A 06-Dec-20 12:09 AM How drunk are these people? 06-Dec-20 12:13 AM Yes 06-Dec-20 03:25 AM independence day level drunk 06-Dec-20 07:09 AM Was the cone placed under it because of the drunk person standing directly under it in a previous photo? 06-Dec-20 05:40 PM has anyone installed fume hood ducting before? i'm setting up a new way to get both fume hood and laser cutter to vent out a window, considering using acrylic sheet to cut holes for the ducting and attach it to a window but curious of others who may have done similar before 06-Dec-20 07:19 PM Is this after you have run your exhaust through filtration first before exhausting out your window? 06-Dec-20 07:20 PM it's filtered first, the fume hood has built in HEPA filter and blower 06-Dec-20 07:20 PM So the biggest consideration is where you have negative and positive pressure 06-Dec-20 07:20 PM Best practice/nfpa 45 guidelines is always run all indoor parts of the system at positive pressure big the system is going to be used for chemical vapors 06-Dec-20 07:20 PM If the system is going to be used for particulant in tandem with a hepa filter then you need to run everything before and the filter and the filter itself at negative pressure 06-Dec-20 07:20 PM You never want to connect two blowers to the same exhaust line, and you never want to connect a blower to the low pressure side of another exhaust 06-Dec-20 07:28 PM i see, so i need to ensure the room has higher pressure than the outside, and just keeping pressure monitors on both side would suffice? assuming i'm at enough of a difference? btw when not using it, there will be a glass window blocking off the ducts to the outside. is there a suggested method of getting the internal pressure higher, i have an HVAC with fan but not sure how much difference that will make or if i need additional ventilation, i'll get a pressure sensor and test 06-Dec-20 07:28 PM So this is vering in the direction of what's called makeup air 06-Dec-20 07:28 PM And this is also another important inconsideration 06-Dec-20 07:28 PM What I was referring to was the pressure of the exhaust system 06-Dec-20 07:30 PM ahh, so i should be testing the pressure at the input of the system and the output of the ducting while the blower is on 06-Dec-20 07:30 PM From the face of the hood until the exhaust duct exits the building that all should be at a lower pressure than the room 06-Dec-20 07:30 PM So normally you measure face velocity 06-Dec-20 07:30 PM Ensuring low pressure is easy, you just put the exhaust blower outside 06-Dec-20 07:30 PM That way if there's a leak in the system you suck air in through the leak inside instead of blowing fumes out inside 06-Dec-20 07:30 PM Your hood is likely designed to have somewhere in the neighborhood of 100 feet per minute of face velocity 06-Dec-20 07:32 PM my window is side-hung outwards so i'd need to keep everything inside or it wouldn't be able to close 06-Dec-20 07:32 PM yeah up to 100fpm 06-Dec-20 07:33 PM Are you using a scrubber or filter pack? 06-Dec-20 07:33 PM not sure...it has a bag in bag out hepa filter 06-Dec-20 07:33 PM Filter pack 06-Dec-20 07:33 PM So the blower 100% needs to be after that 06-Dec-20 07:33 PM You don't want to ever pressurise your filter 06-Dec-20 07:33 PM What type of hood is this? 06-Dec-20 07:35 PM nuaire nu-813-300 06-Dec-20 07:35 PM Ah 06-Dec-20 07:35 PM So I'm personally not the biggest fans of this type because you are limited in what's safe to do in it 06-Dec-20 07:35 PM how so? 06-Dec-20 07:36 PM Interested blower right? 06-Dec-20 07:36 PM *intergrated 06-Dec-20 07:36 PM integrated yeah 06-Dec-20 07:36 PM So this is really only safe to use with particulant 06-Dec-20 07:36 PM Anything that won't be filter ie fumes is going to be exhausted under positive pressure 06-Dec-20 07:36 PM Assuming your just using hepa 06-Dec-20 07:36 PM You can get scrubber filters that will allow some solvent use 06-Dec-20 07:36 PM Or depending on the design some other specific gasses 06-Dec-20 07:38 PM And it will do almost nothing for the nuisance odor of your laser working on anything acrylic or PCB, if your window is anywhere near an area that neighbors will will notice. 06-Dec-20 07:39 PM i have a separate filter for laser cutter 06-Dec-20 07:39 PM Even if it isn't toxic, and you definitely should check what you're working on carefully, your neighbors will definitely claim you're trying to poison them if the smell is bad. 06-Dec-20 07:39 PM But regardless those type of filters are not considered optimal for any fume generating process and require constant inspection to be safe 06-Dec-20 07:39 PM ^ yes, that. 06-Dec-20 07:41 PM fortunately this is in an area that my neighbors don't typically open the window - i've been using the laser cutter through there for a while without a filter for the past few years (recently got a filter) and no complaints. it's basically a back room/den (same floor plan as neighbors) and not an area people ever walk through either fortunately 06-Dec-20 07:42 PM As funranium knows I'm currently involved in an ongoing saga involving a hood exhaust system using 2 filters and this sort of thing if designed incorrectly can turn from a system that exhausts gasses out side to a system that blows them at the operator rather quickly 06-Dec-20 07:42 PM Really with that type of hood only safe way to do it is to have 2 seperate exhaust lines 06-Dec-20 07:43 PM i can validate that by monitoring and comparing pressure between face of the hood and end of duct, right? and could i add an additional blower to ensure there's enough pressure? 06-Dec-20 07:43 PM btw the laser cutter will have an entirely separate exhaust 06-Dec-20 07:44 PM Yeah seperate is good 06-Dec-20 07:44 PM sorry if i didn't state that 06-Dec-20 07:44 PM Ok yeah that eliminates a lot of issues 06-Dec-20 07:44 PM What are you doing under the hood? 06-Dec-20 07:44 PM And depending on where you live and what you're exhausting, you may owe a call to your local air quality district. 06-Dec-20 07:45 PM random projects, electrolysis, electroplating, IC decapsulation 06-Dec-20 07:45 PM Wrong type of hood unfortunately 06-Dec-20 07:45 PM what would make the hood the correct type? 06-Dec-20 07:46 PM That's all fume producing and especially if decapsulation you don't want to run that through a hepa 06-Dec-20 07:47 PM what type of hood would i look for fumes? i guess i'd like to understand the actual differences so i can either modify to do what i need or determine what i can use it for generally and perform other things differently 06-Dec-20 07:48 PM You want a chemical fume hood 06-Dec-20 07:48 PM And really you need an outside blower assembly to do this safely 06-Dec-20 07:48 PM Because of the nature of acid fumes 06-Dec-20 07:49 PM i see, i suppose i could set that up and will just need to always keep that window open 06-Dec-20 07:49 PM could i add a blower outside and add to this? or are you saying the hepa filter is an issue? in that scenario, i could remove the filter or place it somewhere else 06-Dec-20 07:49 PM i appreciate all the info btw! 06-Dec-20 07:51 PM Funranium can correct me if I'm wrong but I don't think there's any standard for running acid fumes with and duct work under positive pressure 06-Dec-20 07:51 PM Removing the filter probly won't make it safe 06-Dec-20 07:51 PM You don't want to be running acid vapor through a disabled blower assembly either 06-Dec-20 07:54 PM i can remove that 06-Dec-20 07:55 PM You have to be careful when modifying hoods 06-Dec-20 07:55 PM There's a lot more to good hood airflow than just it sucks hard 06-Dec-20 07:55 PM You want good flow everywhere, no vortices 06-Dec-20 07:55 PM The last parts a little bit hard to describe but basically you also want to not be trying to "lift" all of the air 06-Dec-20 07:55 PM In a well designed hood there's air entering the exhaust right at the work surface and a few inches above the work surface 06-Dec-20 07:55 PM And then another inlet at the top of the hood 06-Dec-20 07:55 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/Add_OnAirSashAirFlowImage1-42F09.png 06-Dec-20 07:55 PM Basically this 06-Dec-20 08:01 PM i see 06-Dec-20 08:01 PM This is what you see in hoods designed for chemical vapors 06-Dec-20 08:01 PM https://ehs.princeton.edu/book/export/html/369 06-Dec-20 08:04 PM interesting 06-Dec-20 08:05 PM Anyways, I have to get back to actually dealing with these exact problems right now 06-Dec-20 08:05 PM Let me know if you have any other questions though 06-Dec-20 08:05 PM Basically though your goal with the exhaust system should be for it to be intrensicly safe 06-Dec-20 08:05 PM Think about likely failures like power outages or duct leaks and then make system level design choices that fundamentally eliminate them 06-Dec-20 08:05 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/HierarchyControls-A6504.jpg 06-Dec-20 08:08 PM i appreciate it! i was going for a hood i could afford (ebay special) so will see what options i have to try to make it reasonable and reduce risk as much as possible 06-Dec-20 08:09 PM If you haven't read about the heirchy of controls this is exactly where it applies 06-Dec-20 08:09 PM oh i haven't, great 06-Dec-20 08:09 PM i also use PPE while doing these sorts of things in addition but this is really helpful 06-Dec-20 08:10 PM We should probably but the hierarchy of controls in #welcome. 06-Dec-20 08:10 PM IE instead of running the exhaust positive pressure and then needing to constantly ensure there's no leaks in the exhaust, use good engineering choices to try to eliminate that hazard 06-Dec-20 08:10 PM We really should 06-Dec-20 08:10 PM As an admin you can post there btw funranium 06-Dec-20 08:10 PM https://www.hemcocorp.com/hoodvent.html 06-Dec-20 08:10 PM One more good resource on fume hood design, this is defenitly not the the be all end all guide, but it covers a lot different options you can evaluate 06-Dec-20 08:10 PM Anyways I could go on a lot more in some detail about ways you can fuck up fume hood design, but I need to get back to actually dealing with a fucked up fume hood 06-Dec-20 08:20 PM I made a fumehood with a baffle 06-Dec-20 08:20 PM and filters pre-fan 06-Dec-20 08:20 PM https://goo.gl/photos/MndYWDWKzWdrgeJc8 06-Dec-20 08:20 PM dudes online that were also doing chemistry stuff showed their soggy fan after running a few experiments with HCl without a filter, just exhausting it ,heh 06-Dec-20 08:20 PM like kitchen fan stuff 06-Dec-20 08:21 PM Ok last thing a swear 06-Dec-20 08:21 PM You want an indirect style blower for RFNA other highly corrosive fumes 06-Dec-20 08:22 PM I also built a scrubber in that exhaust... I did a bunch to make it as safe and neutralizing as possible 06-Dec-20 08:22 PM oh great 06-Dec-20 08:22 PM Ie the blower itself is out of the exhaust 06-Dec-20 08:22 PM I looked into that slightly 06-Dec-20 08:22 PM So you're basically using the venturi effect 06-Dec-20 08:23 PM yeah, efficiency is pretty bad from what I gather 06-Dec-20 08:23 PM but, who cares if you are dealing with bad fumes 06-Dec-20 08:23 PM the point is not energy savings at that point 06-Dec-20 08:25 PM i see 06-Dec-20 08:25 PM You can also usually find pretty inexpensive fume hoods used but a massive amount of caution is required when handling a used fume hood and docontamination is a big undertaking and it takes a lot of work to get to "yes this used hood I got that I don't know what was used with is now safe to move around and work on" 06-Dec-20 08:26 PM my filters were NOS, luckily 06-Dec-20 08:26 PM captair brand iirc? 06-Dec-20 08:26 PM it's basically just activated charcoal, likely impreg'd with something, in carbon socks, sandwiched between some eggcrate plastic 06-Dec-20 08:26 PM and they are somewhat modules that are ultrasonically wleded together for the right size 06-Dec-20 08:26 PM I thought I did a decent job at building that first hood... next one is certainly going to be better 06-Dec-20 08:26 PM I do nt know any kind of saftey requirements/guidelines... I looked at commercial products and replicated what I could, concept+construciton wise, while not owning the house I was at, at the time 06-Dec-20 08:26 PM ie, if I could have mounted a fan outside up on the roof that would have made life easier.. that fan is kind of loud 06-Dec-20 08:26 PM especially during a 8hr reaction 06-Dec-20 08:26 PM anyways, most of my experience is just from building and using that 07-Dec-20 12:35 AM This is why I want to move to big acreage, so neighbors don't have a chance at smelling exhaust, or hearing pumps/fans at odd hours 07-Dec-20 12:35 AM Definitely thought more than twice while laser cutting and sucking the fumes outside about the nextdoor neighbor and their kid who's like 6 months older than mine 07-Dec-20 12:35 AM Never cared much if I was cutting wood, plastic I just ensured it was after dark when the kid more likely than not would be inside 07-Dec-20 12:35 AM Law here is whether you can smell something at the property line 07-Dec-20 12:35 AM So presumably a huge smokestack could also work in my favor 07-Dec-20 12:35 AM But thinking of more serious chemistry, definitely a lot of work to be done in scrubbing the exhaust one way or another 07-Dec-20 12:35 AM @samy no eave outside the window for a fan/blower to be mounted? That's where I've got mine, routed ducts through a thick piece of foam insulation board that I laminated some sort of plastic to with glue.. siliconed it in place in the open window, used a piece of wood to prevent the window from being opened further 07-Dec-20 12:43 AM Generally I'd suggest trying to capture any gas/aerosol before it even went into the fumehood if possible. Filtration/scrubbing in the ducting itself always feels really dicey to me 07-Dec-20 01:47 AM Yeah, I don't think I'll be running fab processing equipment in a fume hood anyway! 07-Dec-20 01:47 AM But yeah, like if a process evolves ammonia, I think I'd just bubble the exhaust through a water bucket to dissolve it 07-Dec-20 01:47 AM Or some acid, bubble it into a basic solution to neutralize 07-Dec-20 01:47 AM You can't spell superfund without FUN! 07-Dec-20 01:47 AM I feel like that needs to be a t-shirt 07-Dec-20 01:50 AM I’d buy one 07-Dec-20 07:32 AM Your dedication to keeping my colleagues employed is appreciated. 07-Dec-20 09:36 AM possibly, just tough with the window available as it swings out so if i do open it and have something outside, the window would need to remain permanently open 07-Dec-20 10:52 AM I had a small window in the room I was doing experiments in that was perm opened 07-Dec-20 10:52 AM with the duct 07-Dec-20 10:52 AM I was also in a converted attic, so there were others who lived below me (not the owners) so I tried to have the exhaust fan off by midnight 07-Dec-20 10:52 AM they were my age, so it wasnt a huge worry, but it still kind of sucked... upon moving here I had such big plans to be able to do this and that with all the space and nobody too close, but other projects got in the way, mostly house work 07-Dec-20 11:52 AM Please don't mis-judge, I am an environmentalist. I just also know how to make puns once in a while. 07-Dec-20 12:06 PM At one point there was a fantastic "It's the CERCLA of life" shirt, showing cradle to grave to rebirth for a hazardous waste drum, with the drum being held aloft by a suited up hazmat tech. It was one of those [sad laugh] shirts because it's true funnies. 07-Dec-20 12:35 PM A HEPA filter would not typically be used in a chemistry hood, it would be usually only encountered in a laminar flow hood or biosafety cabinet. Chemical hoods typically extract everything to the outside stack without filters. Scrubbers or filters may be used if lots of acid vapor is used or radioisotopes, but for general use stuff? Not always. Laminar flow cabinet - basically, air comes in through a HEPA filter, laminar flow, air goes out to the room. Used to keep things sterile, like biological media or sterile non-hazardous pharmaceuticals. Provides zero chemical or biological protection to the operator. Free-standing cabinet with no stack plumbing. Biosafety cabinets (I mean Class 2, the most common) are similar but with HEPA filtering on the air going back out into the room, protecting the operator from biohazards as well as keeping the work sterile. Again, it is free standing and doesn’t need to be built in. Neither one provides small-molecule protection since small molecules go straight through the HEPA. (When the biologists are playing with a gallon of chloroform, in the BSC, trouble ensues.) 07-Dec-20 01:10 PM https://www.reddit.com/r/interestingasfuck/comments/k8n8sz/dad_created_plasma_in_the_basement_apparently_it 07-Dec-20 01:14 PM Big glass jar with no implosion protection 07-Dec-20 01:39 PM I like the NPT epoxy 07-Dec-20 01:44 PM Hmm, (inspired by that reddit post) - do anyone here has experience with creating your-own plasma globe? (https://en.wikipedia.org/wiki/Plasma_globe) 07-Dec-20 02:33 PM Look up Aaron Ristau, he makes impressive beautiful custom neon / plasma / discharge tube devices 07-Dec-20 02:33 PM I haven’t made one, but basically you just need vacuum and an appropriate fill gas and the ability to pinch off and seal the globe. You also need high frequency HV, a DC power supply won’t work. 07-Dec-20 03:03 PM GUYS.... DISCORD FINALLY ADDED SPELLCHECK 07-Dec-20 03:03 PM that is all 07-Dec-20 03:11 PM I guess it's been around for a while - just not enabled by default? 07-Dec-20 04:00 PM I guess? 07-Dec-20 04:00 PM It's been really useful for me at least. 07-Dec-20 04:20 PM I've been complaining that it didn't exist 07-Dec-20 04:20 PM boy was I wrong 07-Dec-20 04:47 PM After reading that Reddit thread I had to look up what a shaker cup ball was, because, you know, nerds who don’t hang out at the gym 07-Dec-20 04:47 PM https://www.aliexpress.com/i/4001197812500.html? 07-Dec-20 04:47 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/image0-AAEE4.png 07-Dec-20 07:01 PM Gym? I assumed it was for alcohol mixing 07-Dec-20 07:04 PM do those need to be mutually exclusive? 07-Dec-20 07:04 PM protein mudslide 08-Dec-20 08:36 AM https://physics.aps.org/articles/v13/181?utm_campaign=weekly&utm_medium=email&utm_source=emailalert 08-Dec-20 08:36 AM A future project at the European Spallation Source will use cooling water warmed by accelerator equipment to de-ice bicycle paths, potentially reducing the wintertime “influx of people to the hospital with broken legs,” says physicist Mats Lindroos. 08-Dec-20 08:36 AM l o l 08-Dec-20 12:13 PM https://twitter.com/shoe0nhead/status/1336377310413541382?s=21 08-Dec-20 12:13 PM How on earth did that get past any chemical safety people? 08-Dec-20 12:17 PM @rfs According to wiki (and my CS1.6 knowledge), this is just "regular" smoke granade: https://en.wikipedia.org/wiki/Smoke_composition . It just should not be used as tear gas... 08-Dec-20 12:18 PM The smoke mix somehow sounds even worse. 08-Dec-20 12:19 PM I think the smoke mostly got deployed to counter the lasing incidents and not in crowds 08-Dec-20 12:19 PM Been awhile since I was watching the streams of the Portland stuff though 08-Dec-20 12:21 PM I don't really think you can use the word "mostly" here 08-Dec-20 12:30 PM Did not consider that. 08-Dec-20 12:30 PM Makes sense and allows cheaper protection than outfitting everybody with wide band goggles. 08-Dec-20 12:30 PM As IIRC both green and blue lasers have been used for that :/ 08-Dec-20 12:32 PM It seems like the sort of thing that would be loudly announced as "why" they were gassing/smoking protestors?.. 08-Dec-20 12:32 PM but it's... not? 08-Dec-20 12:33 PM Yeah 08-Dec-20 12:33 PM like it doesn't do them any favour to keep that knowledge secret if it's a conscious decision 08-Dec-20 12:33 PM Echoes of the "we are not bombing them with WP, we are bombing their equipment" 08-Dec-20 12:34 PM even "equipment they may possess" 08-Dec-20 12:34 PM But seeing as today is the first I've heard someone suggest that as a reason, it seems highly unlikely that was even a thought among the majority of people tossing them this year. 08-Dec-20 12:40 PM Yea 08-Dec-20 12:48 PM I have not seen the article that the screenshots are from but not sure why "mostly" is a problem with regard to the intents of the smoke comp being used in the buffer area between law enforcement/others vs teargas directly into the crowds. From the footage on the livestreams that I watched when I fell down that rabbithole there seemed to be a clear distinction in usage...but I certainly did not see everything (as much as I might have tried haha) 08-Dec-20 01:40 PM I think I just explained why I don't think you can make a statement like "oh they were probably mostly using X for Y" 08-Dec-20 01:40 PM because it seems improbable 08-Dec-20 01:43 PM I was just speaking to what I saw happening on livestreams... The lasing would start and then they would pop some smoke comp and toss them in front of the law enforcement lines 08-Dec-20 01:44 PM seems probable to be confirmation bias if they're not coming out with that as an explanation? 08-Dec-20 01:44 PM (ie they appear correlated but may not actually be) 08-Dec-20 01:44 PM IDK I mean it's a good idea, but it would be really weird to have gone this many months with it being an intentional reactive measure and barely talked about. Occam factor and all 08-Dec-20 01:45 PM Why would they be deploying it right in front of their own lines if it was intended as antipersonnel stuff? They had plenty of CS/tear gas grenades they were shooting into the crowds 08-Dec-20 01:47 PM if they had a reason, they'd have been darn clear because it makes them seem like the victim just defending themselves 08-Dec-20 01:48 PM https://www.google.com/search?q=smoke+portland+federal&tbm=isch Not 100% of that is likely to be the smoke comp but a LOT of it was and the feds/law enforcement are standing right in the midst of it 08-Dec-20 01:50 PM You'd get the same photos if they threw them into the crowds and then marched on them, but you're right that it looks like it's by them 08-Dec-20 01:51 PM It was pretty consistent on the livestream footage where they would toss the smoke comp grenades out in front of their lines but the tear gas was getting shot into the crowds 08-Dec-20 01:53 PM If they weren't specifically going after lasers, there'd be less need to explain why that was their method 08-Dec-20 01:53 PM laser would be an easy explanation 08-Dec-20 03:48 PM Okay so I've now had two iSEG HV PSUs fail this year. Fun. 08-Dec-20 08:16 PM Just typical law enforcement things 08-Dec-20 08:16 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/image0-4F956.jpg 08-Dec-20 08:16 PM Zinc chloride smoke pyrotechnics are nasty and have an established record of causing deaths in soldiers and civilians where proper respiratory protection is not available. https://pubmed.ncbi.nlm.nih.gov/18584371/ 08-Dec-20 08:21 PM ooh is this an unboxing video 08-Dec-20 08:21 PM Wow, 21 year old too. 09-Dec-20 10:04 AM @funranium just saw your chart on the welcome thread for project hazard mitigation. Where does paddle drill bit in a plunge router fit into that chart? Hahahaha. I slight because somebody I know did that. It instantly helicoptered the bit and became a spinning ninja of death. The evidently screamed like a little girl and threw the running router across the shop. That friend is Adam Carolla. Hahahah 09-Dec-20 10:04 AM And yes. I hit accidentally hit send before I proof red that. Oops. 09-Dec-20 11:15 AM The fire safety officer just flagrantly ignored the class IV laser on lightbulb... 09-Dec-20 11:16 AM hey, at least you have one 09-Dec-20 11:16 AM ours came by and asked us to cut a hole in a poster that was blocking the exit map, IDK if she came into the labs 09-Dec-20 11:19 AM She was just checking fire extinguishers 09-Dec-20 11:19 AM But I was just like...I'm working on this literally right now. I cannot guarantee containment 09-Dec-20 11:20 AM in the building I live 09-Dec-20 11:20 AM they did the fire check 09-Dec-20 11:20 AM and for about a week 09-Dec-20 11:20 AM And I have the do not enter bulb on 09-Dec-20 11:20 AM a giant tag on one extinguisher just said 09-Dec-20 11:20 AM "REPLACE ASAP" 09-Dec-20 03:42 PM The Hierarchy of Controls that @AdamMcCombs passed along is all over the place, but that particular one that includes substitution and elimination is indicative that it came from a chemical culture. Those two don’t come up often in laser and radiation land. 09-Dec-20 03:42 PM *was just first good looking image I found on google when talking to Samy 09-Dec-20 05:25 PM @Mezmorizor https://future.virbela.com/virbela-holiday-party-2020 09-Dec-20 05:26 PM So...server Virbela holiday party? 09-Dec-20 05:27 PM We used to do weekly hangouts in voice chat 09-Dec-20 05:27 PM That might be kinda fun to start up again 09-Dec-20 05:27 PM virbela is a whole different level 09-Dec-20 05:27 PM I just wish something sciencey would use it again 09-Dec-20 05:27 PM virbela physics conference has been one of my pandemic highlights 09-Dec-20 05:28 PM Virbela is a trip 09-Dec-20 05:28 PM virbela sounds like something about learning phonics in a beautiful way 09-Dec-20 05:28 PM Does it still look the same as it did in ~April? 09-Dec-20 05:29 PM I think they've put more effort into the miis 09-Dec-20 05:29 PM their real estate company is actually pretty big in vancouver now it seems 09-Dec-20 05:29 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/129670942_998689763975326_7774781304555422-1EEFF.png 09-Dec-20 05:31 PM While a respectable business decision, mildly disappointing 09-Dec-20 05:32 PM I could definitely get used to it 09-Dec-20 05:32 PM like if nature put on a monthly set of interdisciplinary talks 09-Dec-20 05:32 PM over virbela 09-Dec-20 05:35 PM Ok I'm going to have to look into vibela more 09-Dec-20 05:37 PM it's what miiverse should have been 09-Dec-20 06:51 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/PXL_20201210_025047585-F205B.jpg 09-Dec-20 06:51 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/PXL_20201210_022848549-E7D06.jpg 09-Dec-20 06:51 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/PXL_20201210_023258991-BD4D7.jpg 09-Dec-20 06:51 PM Fixing a stage stability issue on a TEM 09-Dec-20 07:16 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/PXL_20201210_022844632-80CB2.jpg 09-Dec-20 07:16 PM I'm pretty sure the issue was some grease got on the white bearing surface causing about 30u of uncontrolled movement in the x and z axis 09-Dec-20 09:00 PM Congratulations! You've gotten to actually do the work you wanted to do rather than reinvent the universe first. 09-Dec-20 09:20 PM Unfortunately I'm not going to know if this was the fix until tomorrow because I need an overnight pump before I can bring up the beam 10-Dec-20 12:03 AM Abandoned soviet semiconductor fab https://ralphmirebs.livejournal.com/226489.html 10-Dec-20 05:14 AM For a second, I thought you said Vibella and, if so, the site would have to use the Cat Vibing to meme. 10-Dec-20 01:15 PM I still kinda wish new gear used incandescent iluminators instead of LEDs on things like scales. 10-Dec-20 01:15 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/PXL_20201210_211208812-BDA7F.jpg 10-Dec-20 01:15 PM The warm glow is just so nice sometimes 10-Dec-20 10:06 PM Hey anyone here live in the bay area and want a free probe station? 10-Dec-20 10:06 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/ced70655-52ce-4606-a466-a91cc54f0079_fulls-7B655.jpg 11-Dec-20 02:05 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/PXL_20201211_215536811-0A56C.jpg 11-Dec-20 02:05 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/PXL_20201211_220439019-4878E.jpg 11-Dec-20 02:05 PM Earlier repairs on this TEM stage helped a lot but still had a different type of instability, so I stripped it down completely and found a hardened clump of grease in part of the tilt/translation mechanism. It's thick enough to be interfering with other parts of the mechanism 11-Dec-20 02:05 PM Grease is on retention ring 205 if anyone is interested 11-Dec-20 02:05 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/PXL_20201211_220844727-4D67B.jpg 11-Dec-20 02:05 PM @Noxz @Conmega you both like watches so I think you would appreciate this as well 11-Dec-20 02:34 PM Uh yup that's exactly how that thing comes apart and goes back together hopefully. 11-Dec-20 02:34 PM :) 11-Dec-20 02:44 PM I see a part #1 and #325 11-Dec-20 02:44 PM I do not see any oiling/greasing guidelines on that though 11-Dec-20 02:51 PM Yeah I know 11-Dec-20 02:51 PM The manual says "use the right viscosity of oil to eliminate slop while keeping the mechanism easy to turn" and then just doesn't give me any more info after that 11-Dec-20 02:51 PM So if you have recommendations on a set of lubricants I could get to try out that would be helpful 11-Dec-20 02:53 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/DSC_2332-2B877.JPG 11-Dec-20 02:53 PM how most tech sheets distinguish between types of oil, clarified on the next page, but they use various symbols 11-Dec-20 02:53 PM including astrisks and whatnot for small amoount 11-Dec-20 02:53 PM Lol I wish 11-Dec-20 02:53 PM Every surface in this thing is coated in something 11-Dec-20 02:54 PM unst 11-Dec-20 02:54 PM I'd love to get my hands on one of those things at some point 11-Dec-20 02:54 PM I think the soonest thing I will play around with, that is hardly related, is depositing monolayers of MoS2 on ruby jewels, via Langmuir Films (no vapor deposition or anything cool like that) 11-Dec-20 03:04 PM I would love to bring one to you and play around with it to figure out what I can do to tune them up 11-Dec-20 03:09 PM I don't even have a high level idea of what it is in the end, beyond a stage 11-Dec-20 03:09 PM I've got a more "functional" diagram I'll post here 11-Dec-20 03:09 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/PXL_20201210_211155331-033D9.jpg 11-Dec-20 03:09 PM Here's what it looks like assembled, which probably doesn't help much 11-Dec-20 03:09 PM It's a goniometer, with the x and z axis mounted inside of a rotating barrel 11-Dec-20 05:29 PM So I also found some slop in the bearings. These are FEI custom so instead of waiting on new ones I shimmed these with lens tissue and cut it flush before assembling it in the bore 11-Dec-20 05:29 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/PXL_20201212_011329137-1AEDA.jpg 11-Dec-20 05:29 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/PXL_20201212_012718011-01B35.jpg 11-Dec-20 06:53 PM @funranium haha look what's available up here: https://vancouver.craigslist.org/bnc/app/d/burnaby-lelit-pl41tem-espresso-machine/7243222708.html 11-Dec-20 06:56 PM I'm sorry I wasn't aware that vfd on an espresso machine was an option 11-Dec-20 09:49 PM Did you ever get so focused on getting something done only to later realize you have basically made a possible implement of your own demise? I was very eager to try out a new cataphoresis mix for applying aluminum oxide coatings I forgot that the bench supply I was using would produce an arc even though it’s current limited. HP in their wisdom decided to put a large enough cap directly across the output to throw a spark when you short the output. The wire being coated is tungsten and the tank (cup in this care) is stainless steel. The solution is mostly methanol and acetone. So evidently an arc can occur under the surface of this particular liquid. Thank god it was below the surface or even just from the vapors I would have had a burning mess on my bench. That would have been an interesting insurance claim. So how did you burn your place down and wind up needing skin grafts again? Count my lucky stars! I need to make up some holders to prevent contact and hold the wires nice and straight and come up with a power supply that cannot throw an arc under any circumstances. Normally the solutions I use are water based so the normal list of safety measures in my head for this kind of thing don’t contain flammability concerns. 11-Dec-20 09:49 PM Oh it does work though. Coats nicely. Now I just have to figure out a rig to hydrogen fire them for sintering post coating. 11-Dec-20 10:09 PM Me? No. The researchers I do my best to keep from maiming themselves and each other? Regularly. I'm glad you're okay. 11-Dec-20 10:09 PM That's quite a thing. 11-Dec-20 10:23 PM Turns out one of my vintage imacs runs windows 98? 11-Dec-20 10:23 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/image0-86382.jpg 11-Dec-20 10:37 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/FB_IMG_1607745374730-9F57C.png 12-Dec-20 08:45 AM https://www.straight.com/finance/former-ubc-professor-carl-hansen-now-worth-more-than-4-billion-following-spectacular congrats? 12-Dec-20 08:55 AM Anyone know how to go from number of monoenergetic photons emitted to a more normal unit of brightness? 12-Dec-20 08:55 AM Is it just energy based? 12-Dec-20 09:16 AM Brightness isn’t nicely physicsy 12-Dec-20 09:16 AM https://physics.stackexchange.com/questions/191678/brightness-of-light-sources/191742#191742 It depends on many more parameters 12-Dec-20 09:24 AM Ah, fun 12-Dec-20 09:24 AM Might just be a try and see kinda deal then. 12-Dec-20 10:25 AM Ohhhh, I remember a particularly BS question in a health physics class that gave us x-ray output in lux and asked for a calculated absorbed dose. Professor was being cute and I ruined his fun by pointing out the wavelength dependence meant he'd effectively asked "How many fathoms of cows ya got there?" and the answer was thus zero. 12-Dec-20 10:37 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/image0-2186E.png 12-Dec-20 01:38 PM @adammunich I have seen similar situations. Bolt cutters through a energized entrance is a perennial occurrence when most remodeling is done in California without permits cause they make them too hard to get. 12-Dec-20 01:46 PM @Charles @funranium you'll both love this one 12-Dec-20 01:46 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/received_3367654866691287-9160A.webp 12-Dec-20 01:46 PM Severed building neutral, ground returns through gas flex 12-Dec-20 04:15 PM Oh god 12-Dec-20 04:15 PM Thats terrifying 12-Dec-20 04:15 PM I wonder what chemistry is going on in that gas line though... 12-Dec-20 04:27 PM same 12-Dec-20 04:27 PM All kinds of interesting things could be happening 12-Dec-20 04:27 PM and I wonder if that could be considered a viable way to make a high temperature (relatively) reactor for gas stuff. 12-Dec-20 07:12 PM Oh noooooooo.... The main valve on my bigger vacuum system has a failing seal. 12-Dec-20 07:12 PM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/image0-32DE8.jpg 12-Dec-20 07:12 PM When I just slightly crack it it’s ok but if I open it up any kore than that it leaks. It’s the type that uses a intermediate exhaust port that makes the outside of the bonnet more or less the same pressure as the forepump inlet but it’s like gulping enough air to be able to hear it in the pump so it’s like an external seal leak. 12-Dec-20 07:12 PM Hopefully being Veeco it’s a standard type o ring or seal but if not then I’m in big trouble. 12-Dec-20 07:12 PM The main valve is also my cold trap. It’s a big fabricated unit that the pump hangs off of and was all designed to work together. Can’t just swap out the valve. 13-Dec-20 12:40 AM the weed people have made vacuum equipment pretty expensive on craigslist now 13-Dec-20 12:40 AM everyone is discovering vacuum distillation 13-Dec-20 09:54 AM suggestions on determining the plating of a metal? 13-Dec-20 10:11 AM @samy EDX, atomic emission spectroscopy, raman spectroscopy, IR spectroscopy 13-Dec-20 10:11 AM Probably some chemical techniques but you'd likely have to do a panel of tests 13-Dec-20 10:11 AM Probably some flowchart out there for doing that 13-Dec-20 10:14 AM ahh cool, and those would identify just the outer layer, not internal as everything would excite/reflect off only the outside? 13-Dec-20 10:14 AM checking each of these out. which would you think is likely "easiest" to create at home? 13-Dec-20 10:40 AM How mysterious or unknown is the object you are trying to determine the plating of? 13-Dec-20 10:40 AM Any way to just look it up or is that 100% not the point of your question? 13-Dec-20 10:51 AM @LRM good question! i'm trying to solve two things - one, i took apart a mechanical pencil i enjoy using and noticed the spring looks a little copper/brassy, probably very easy to deduce but i'm more interested in a repeatable method i can use in the future on many types of plated metals rather than just knowing this one trivial fact 13-Dec-20 10:52 AM Can you make friends with the xray guy at your local scrapyard? 13-Dec-20 10:52 AM That is definitely the cheapest/most viable option for true mystery metals in my experience 13-Dec-20 10:55 AM ahh interesting 13-Dec-20 10:55 AM i could try but would rather do as much as possible at home (even if it means somehow building or getting a small xray) 13-Dec-20 02:36 PM I paid to have 2 steel alloys (small stuff, watch screw & pinion) analyzed for content, then I had to match it up with the nearest available standard 13-Dec-20 02:36 PM if you have plenty more, as sacrificial stuff, you may be able to do chemical resistance testing 13-Dec-20 03:43 PM @Alan Sailer where are you located? 13-Dec-20 03:43 PM I have access to a very nice pXRF gun in Chicago. 13-Dec-20 03:43 PM @AdamMcCombs I do enough with electronics as my eyesight is getting worse and eventually want to get back into watches. I’m thinking a Bausch + Lomb inspection scope would be ideal. 13-Dec-20 03:43 PM @GigaSquirrel I’m seeing your pulsejet tweets and am getting terrified. 13-Dec-20 03:43 PM I remember seeing on the web someone who set up a bunch of pulsejets and baffles in a circle to create a hot air vortex, then started pumping gasoline into it and igniting it to make a fire tornado. 13-Dec-20 03:43 PM Supposedly the sound was deafening and authorities were called. 13-Dec-20 03:43 PM https://srl.org/machines/flamehurricane/ 13-Dec-20 04:10 PM hey uh 13-Dec-20 04:10 PM https://www.wsj.com/articles/is-there-a-doctor-in-the-white-house-not-if-you-need-an-m-d-11607727380 13-Dec-20 04:10 PM As for your Ed.D., Madame First Lady, hard-earned though it may have been, please consider stowing it, at least in public, at least for now. Forget the small thrill of being Dr. Jill, and settle for the larger thrill of living for the next four years in the best public housing in the world as First Lady Jill Biden. 13-Dec-20 04:14 PM Oh god that article 13-Dec-20 04:14 PM Madame First Lady—Mrs. Biden—Jill—kiddo 13-Dec-20 04:14 PM I think that's all that really needs to be said 13-Dec-20 04:17 PM It goes on and gets worse though 13-Dec-20 04:55 PM Concerning 13-Dec-20 06:51 PM @samy definitely EDX is a surface technique, and Raman usually is, IR can be too, the others might be possible but could risk getting into the subsurface too 13-Dec-20 06:51 PM You can probably get Raman going at home with the least effort, unless you're particularly good with chemistry, find a flowchart, and buy all the needed reagents 13-Dec-20 06:51 PM @samy I got one of these a few years ago for $76 shipped https://www.ebay.com/itm/BW-Tek-473nm-RAMAN-Spectrometer-B-W-Tek-BWTEK-laser-probe-and-More-DIY/143673198642?hash=item2173970832:g:uswAAOSw05Ve-2tC 13-Dec-20 06:55 PM ahh nice! 13-Dec-20 07:04 PM @samy if it weren't for covid I could run a sample under a scope with eds on it, it's a very powerful surface chemistry tool and can even produce maps of elemental distribution 13-Dec-20 07:04 PM Also btw @nmz787 edax is a brand of eds systems 13-Dec-20 07:04 PM @rdpierce yeah those b&l scopes are ok 13-Dec-20 07:04 PM My recommendation is usually an Olympus sz4045 or sz61 though because there's more accessories available 13-Dec-20 07:09 PM Isn't EDX the non name brand acronym aside from EDS? 13-Dec-20 07:09 PM I thought EDS used the big crystals 13-Dec-20 07:09 PM But EDX didn't 13-Dec-20 07:09 PM @AdamMcCombs is your EDS out of service due to parts suppliers being closed from covid? 13-Dec-20 07:09 PM I think @samy is far enough that he'd need to mail you a sample anyway, if you were concerned with socializing 13-Dec-20 07:17 PM No the crystal thing is wda 13-Dec-20 07:17 PM *wds 13-Dec-20 07:17 PM Wavelength dispersive spectroscopy 13-Dec-20 07:17 PM Eds is energy dispersive spectroscopy 13-Dec-20 07:17 PM Edax really trys to make edx a thing but it's not 13-Dec-20 07:34 PM @Mezmorizor https://www.nytimes.com/2020/12/13/business/dr-jill-biden-wall-street-journal.html 13-Dec-20 07:34 PM top editor for WSJ 13-Dec-20 07:34 PM defends the piece 13-Dec-20 07:34 PM and says this golden nugget 13-Dec-20 07:34 PM criticizing Mr. Epstein’s use of “kiddo” to refer to Dr. Biden was misplaced, since Mr. Biden has also used the term in reference to his wife. 13-Dec-20 07:36 PM Brilliant 13-Dec-20 07:36 PM The other thing to look at is the field number in the sz61 is a lot higher than in the b&l or sz4045, so you see a bigger viewing circle in your eyes. It's really nice actually. 13-Dec-20 07:36 PM Also just image quality is better in general 13-Dec-20 07:37 PM what a stupid situation to try and make this point 13-Dec-20 07:43 PM Thanks @AdamMcCombs for the advice. Do you encounter these a lot in the field? At good prices? 13-Dec-20 07:43 PM I’m also more interested in one on an arm as opposed to a stand. 13-Dec-20 07:48 PM Yeah I do 13-Dec-20 07:48 PM Ebay is a good place 13-Dec-20 07:48 PM They come up pretty regularly. Sometimes a little bit more than an amscope but definitely worth it 13-Dec-20 07:48 PM The sz61 is still made and at least a few k new 13-Dec-20 07:53 PM ahh 13-Dec-20 07:57 PM Edax's slogan for a while was "the first name in micro analysis" 13-Dec-20 07:59 PM I’ve heard that 13-Dec-20 07:59 PM Were they formally part of Oxford 13-Dec-20 07:59 PM Link ISIS? 13-Dec-20 08:00 PM I think edax is owned by amptek now 13-Dec-20 08:00 PM I don't think they were ever a part of oxford 13-Dec-20 08:00 PM *ametek 13-Dec-20 08:00 PM But oxford has indeed spun off a lot of different product divisions in the em space 13-Dec-20 08:00 PM But they still have their microanalysis stuff 13-Dec-20 08:55 PM The Leica LEO S430 included an Oxford Link ISIS. And I thought that called it EDX. And I thought I saw ad collateral saying something like “the first name in microanalysis” but I could be mistaken. 14-Dec-20 12:59 AM friendly reminder to periodically clean out the dust inside your computer 15-Dec-20 01:08 PM https://www.nature.com/articles/s41598-018-38438-x 15-Dec-20 01:08 PM Apparently this was publishable 15-Dec-20 01:08 PM Even though it's well known in the laser hobbyist space 15-Dec-20 01:18 PM isn't scientific reports 15-Dec-20 01:18 PM nature's attempt to destroy arxiv and open access in general 15-Dec-20 01:18 PM but just publishing all sorts of stuff 15-Dec-20 01:18 PM I've been linked more "this is a paper?..." from there than anywhere else lol 15-Dec-20 01:24 PM Looks like you're right. No real peer review 15-Dec-20 01:38 PM 48% acceptance rate in 2019 15-Dec-20 01:38 PM https://arxiv.org/pdf/1308.1552.pdf 15-Dec-20 01:38 PM neat 15-Dec-20 01:46 PM By no real peer review I more meant that based off of their guidelines, a geometric optics derivation of young's double slit should be accepted 15-Dec-20 01:46 PM Rather than literally no peer review 15-Dec-20 01:46 PM I'm shocked PRL is comparably high in acceptance rate 15-Dec-20 01:46 PM PIs must be much more restrained than I thought 15-Dec-20 04:12 PM Tetrahedron Letters for chemistry got a bad rep in like the 70s for publishing garbage/bad info.. non-verified experiments, hardly peer reviewed, etc 15-Dec-20 04:12 PM I'm always weary when I come across them, even nowadays 15-Dec-20 05:07 PM Tet letter's reputation is still garbage 15-Dec-20 05:07 PM I don't know if it's actually truly bad nowadays, but it's nobody's first journal they try to publish in...or their fourth 15-Dec-20 08:59 PM I changed the O rings on the main valve on my big pump out station and it’s much happier now. Already down to the middle of the -7 scale in an hour. For the longest time I could not get below the middle of the -6 scale. Barley enough for what I am doing. Not bad for $4.25 of O Rings. 16-Dec-20 07:22 AM What does a red "in-transit" bubble on ebay mean? My package cleared customs and is at the local post office for the last 4 days but has not been delivered. Anyone ran into this before? 16-Dec-20 07:22 AM Vacuum%20Hackers%20-%20Text%20Channels%20-%20off-topic-thats-sometimes-on-topic%20%5B514721733626822666%5D.html_Files/aaaaaaaaaaaaaa-617D5.png 16-Dec-20 08:17 AM Yep. It means their sorting piles are huge and they don't have the staff to cope. Happens pretty regularly around the holidays but it happens to be particularly bad this year. 16-Dec-20 08:17 AM Unlike many parts of federal gov't operation, USPS is actually taking the COVID precautions seriously but that does limit the temporary staffing they normally do during the holidays. Removing sorting machines from some major hubs earlier in the year certainly didn't help because they aren't back in place. now. And despite best efforts at work, postal workers are getting sick due to ambient COVID. USPS is actually understaffed this year because of all this. In short, delays have been happening since July but they're getting particularly bad now. 16-Dec-20 08:23 AM if christmas is cancelled in two different ways 16-Dec-20 08:23 AM does that uncancel it? 16-Dec-20 08:25 AM FedEx and UPS are at "LOL, no" with a dramatically smaller volume, other than FedEx's hazmat division. They're popular right now. 16-Dec-20 08:45 AM I have a very heavy package containing some lead and steel that's also stuck in that status as well 16-Dec-20 08:45 AM I still have some hope it will arrive before the end of the year, but I'm not optimistic 16-Dec-20 08:47 AM @funranium will you be able to track whether covid + packages from china being delayed has any measurable effect on issues with lasers in the public? 16-Dec-20 08:47 AM It would be interesting to see if there was a strong correlation. 16-Dec-20 08:55 AM I have been waiting more than a week since something had its last tracking update 16-Dec-20 08:55 AM Going from NY to CA 16-Dec-20 08:56 AM My package is from OH to WI, it was received by USPS on the 10th, and stuck in that status ever since the 11th 16-Dec-20 08:59 AM "December 8, 2020 In Transit, Arriving Late Your package will arrive later than expected, but is still on its way. It is currently in transit to the next facility. " 16-Dec-20 08:59 AM Very encouraging when USPS doesn't even know where it is 16-Dec-20 09:45 AM The translation for that is "in a trailer, at a distribution center, and we'll scan it again when we clear the current giant pile out of the way". 16-Dec-20 09:59 AM If ever there was a year to make sure to give your mail carrier a gift, this is the one. 16-Dec-20 11:20 AM in exciting news 16-Dec-20 11:20 AM have advanced to phd candidacy 16-Dec-20 11:36 AM @idmb congrats!! 16-Dec-20 11:37 AM woo, congrats! 16-Dec-20 11:47 AM awesome 16-Dec-20 11:49 AM now all that's standing between me and paper is science 16-Dec-20 11:50 AM but that's the easy part, isn't it 16-Dec-20 12:07 PM haha...right... 16-Dec-20 12:49 PM Congrats! 16-Dec-20 12:56 PM Congrats! 16-Dec-20 01:16 PM Yea 16-Dec-20 05:39 PM @idmb congrats! 16-Dec-20 05:39 PM https://xkcd.com/1403/ 16-Dec-20 10:14 PM https://www.youtube.com/watch?v=YN2oALaRfL4 16-Dec-20 10:14 PM These all cover super basic concepts but in a really entertaining way 16-Dec-20 10:14 PM Figured some others might enjoy them too if I am 17-Dec-20 03:26 AM What a lovely place https://twitter.com/ademrudin/status/1339404811364515840 17-Dec-20 08:57 AM @UkieGeno I'm originally from Pittsburgh, haven't found an interesting enough job to warrant moving back though. I really miss the pierogi's and southside pretzel shop. 17-Dec-20 09:18 AM There's actually a bit of a electron microscope hub there as well with Gatan and a few others. 17-Dec-20 03:10 PM äääääääääää 17-Dec-20 03:10 PM how do I write cover letter 17-Dec-20 03:10 PM powering thru this day on the power of coffee was not smart 17-Dec-20 03:10 PM But here I am 17-Dec-20 03:10 PM "hall I are RFS, I know all kinds of weird shit having worked with all kinds of weird shit, thus I can adapt and lear nanything, plz hire I like money" 17-Dec-20 10:20 PM @rfs add keywords and you're basically done! 20-Dec-20 08:55 PM Why does all the good stuff come out of the Ukraine or other former Soviet areas? I ordered some zirconium and that seems to be the only non laboratory supply place to get it from. I know it’s kinda dangerous but it takes two months to get anything from there! 20-Dec-20 09:12 PM heavy industry with low labour standards, I imagine? 20-Dec-20 09:12 PM ussr was what china is, etc? 20-Dec-20 11:40 PM All depends how much freedom and what kinds you like in your life. 21-Dec-20 04:00 AM <𝓕ermion#6024> freedom as in having the freedom to backpack through a superfund site. 21-Dec-20 04:00 AM <𝓕ermion#6024> mmmm neoliberal freedoms. 21-Dec-20 04:02 AM how is ordering fron the ukraine dangerous? 21-Dec-20 04:02 AM I got a lot of my stuff from there, always worked 21-Dec-20 04:36 AM <𝓕ermion#6024> it's probably fine. I bought a bunch of tunnel diodes from the ukraine 21-Dec-20 04:36 AM <𝓕ermion#6024> and nixie tubes 21-Dec-20 04:36 AM <𝓕ermion#6024> no probemo 21-Dec-20 04:42 AM So far Ukranians have been fine to do business with. No problems. 21-Dec-20 07:02 AM FYI: if you want to be on good terms with Ukrainians, don’t say “the Ukraine.” 21-Dec-20 07:02 AM Just say Ukraine. 21-Dec-20 07:02 AM Use of “the” effectively implies it is a region, not a sovereign country. 21-Dec-20 07:02 AM I’ve also found that speaking Russian in Kyiv can get you in trouble, but it seems people in the Zone speak Russian by default. 21-Dec-20 07:23 AM The Zirconium itself, especially in powder form is an incendiary. Can be very dangerous. 21-Dec-20 08:32 AM @rdpierce Yep. 21-Dec-20 08:32 AM Zone is shared with Belarus and is closer to the Russian border in general, so kind of makes sense. 21-Dec-20 08:34 AM Also, the technical legacy from Russian engineering. 21-Dec-20 08:34 AM During Soviet times, the plant would have been operated by people speaking Russian. 21-Dec-20 09:04 AM That too 21-Dec-20 10:19 AM "the" "U.S." 21-Dec-20 10:20 AM This isn’t universal, it’s applied specifically to Ukraine. 21-Dec-20 10:20 AM I believe Ukraine means something like borderland / frontier. 21-Dec-20 10:22 AM I'll second @rdpierce's experience. The kind Ukrainians that would like you to not get punched will warn you. The less kind ones will just punch you. 21-Dec-20 10:22 AM So saying it with the article “the” alludes to its use as a common word. 21-Dec-20 10:22 AM Saying Ukraine without the article means it is a proper noun. 21-Dec-20 10:23 AM Hack "the" "gleason" 21-Dec-20 10:23 AM "the" "dude" 21-Dec-20 10:23 AM (the one with the rug tying the place together) 21-Dec-20 10:23 AM Sounds like they need to pick another less Russian name to rebrand 21-Dec-20 10:23 AM I mean, if it actually means frontier 21-Dec-20 10:23 AM You don't say lets go to frontier 21-Dec-20 10:23 AM You say let's go to the frontier 21-Dec-20 10:27 AM It’s a kind of dog whistle. “The Ukraine” = “The frontier” = it’s just Russia’s frontier. It’s a dig against Ukrainian sovereignty. Ukraine without “the” is a proper noun, as is befitting for a country. 21-Dec-20 10:28 AM Aren't they technically in a war right now with Russian trying to control? 21-Dec-20 10:28 AM The United States isn’t really comparable because the sovereignty of the US hasn’t really been questioned since 1812. 21-Dec-20 10:28 AM It’s an undeclared war, but yes. 21-Dec-20 10:29 AM Does Ukraine have a non Russian name? 21-Dec-20 10:30 AM So it’s a hot button topic because Russia is violating Ukrainian sovereignty but denying it and people are dying. 21-Dec-20 10:31 AM Like how India renamed a bunch of cities post independence 21-Dec-20 10:31 AM Like something altogether different? 21-Dec-20 10:32 AM Try going to Kyiv and telling a Ukrainian that they should rename their country. It won’t end well. 21-Dec-20 10:33 AM So it is a country name and not a Russian category? 21-Dec-20 10:35 AM it's also difficult because the majority of the ukrainians you'll meet in north america... have moved away for reasons 21-Dec-20 10:35 AM and may have very different feelings to people with closer ties 21-Dec-20 10:37 AM https://time.com/12597/the-ukraine-or-ukraine/ 21-Dec-20 10:37 AM I forgot, it’s also because in USSR times, there was always a “the” (equivalent) prior to its name so it’s a throwback to pre-independence. 21-Dec-20 10:41 AM Hmm, seems like general unfamiliarity with them and grammar... I still intermix calling my University "Rochester Institute of Technology" and "the Rochester Institute of Technology" 21-Dec-20 10:41 AM "TIME uses Ukraine, sans article, and Kiev, because that’s the spelling Merriam-Webster uses, and that is our go-to reference. Our chief copy editor Dan Adkison points out that we often use a more common spelling rather than transliterating countries in their mother tongue" 21-Dec-20 10:41 AM Even they're confused 21-Dec-20 10:41 AM Or at least inconsistent 21-Dec-20 10:41 AM This feels like conversations with my professors about some science term being stupid and poorly named, and wondering how to go about changing it, only to be told "good luck" 21-Dec-20 10:41 AM But point taken 21-Dec-20 10:41 AM I've read this article before 21-Dec-20 10:46 AM We are not talking about something theoretical, we are talking about a country that declared independence in modern times, whose sovereignty has been brutally violated by the seizure and annexation of Crimea and an undeclared war with Russia in the east. 21-Dec-20 10:46 AM This is a very painful issue. 21-Dec-20 10:49 AM Is there a reason they haven't declared it a war? 21-Dec-20 10:49 AM Or does that only happen by consensus or something? 21-Dec-20 10:50 AM Putin doesn’t acknowledge he’s fighting a war. The Russian soldiers have removed the insignia from their uniforms. 21-Dec-20 10:50 AM It’s plausible deniability. 21-Dec-20 10:51 AM I mean Ukraine 21-Dec-20 10:51 AM Can't they say "this is a war" 21-Dec-20 10:52 AM The Ukrainians are clear that Russia has invaded. Russia disagrees, and claims it’s local insurgents, and maybe some Russian volunteers, but not anything coordinated by Moscow. 21-Dec-20 10:52 AM It’s an awful situation. 21-Dec-20 10:52 AM Europe and the US sanctioned Russia, but there’s only so much they can do because Russia supplies a not insignificant amount of Europe’s gas, and a very significant amount of Ukraine’s gas. 21-Dec-20 10:52 AM Russia likewise denies shooting down a civilian airliner by accident even though it is clear they did it. 21-Dec-20 11:10 AM So what about this comment? "Mine is teak from the deck of the USS New Jersey. Once again, good olive wood from old trees in the Palestine looks good. I have a cup I’m rather fond of from there." 21-Dec-20 11:10 AM I thought Palestine was a country 21-Dec-20 11:15 AM Argh. That's predictive type error. There shouldn't be an article there. 21-Dec-20 11:22 AM Ukranians have had +11000 casualties, so it's not even a small skirmish. 21-Dec-20 01:38 PM I can't tell if you're saying that's a lot or a little 21-Dec-20 01:38 PM It's a lot 21-Dec-20 01:38 PM Maybe not Syria lot, but 11k casualties is not a tiny blip. 21-Dec-20 01:38 PM It's a real and proper war.