--- Day changed Sun Sep 27 2009 00:00 < genehacker> hmmmm.... 00:03 < genehacker> hey I think that andy howell guy was at dorkbot 00:07 < ybit> are you guys going for a toolbook-like animation with pycal3d? 00:08 < kanzure> ybit: toolbook incorporated that idea from skdb 00:08 < drazak> man sometimes you guys are more boring than reading the most bland technical manual 00:09 < fenn> what about an auto-generated technical manual 00:09 < kanzure> you do realize we're basically making a bland technical manual generator? 00:09 < kanzure> hey >:( 00:09 < kanzure> stop reading my brains 00:09 < fenn> sorry it's so difficult with all the cross talk in here 00:09 < kanzure> didn't yo mamma tell you to not cross the signals? 00:10 < fenn> can't stop the signal mel 00:10 < genehacker> complete with indecipherable japanese and oh wait... 00:10 < drazak> man sometimes you guys are more boring than reading the most bland technical manual 00:10 < drazak> shit 00:10 < drazak> I just said that 00:10 < drazak> nevermind 00:11 < drazak> I was scrolled up like 2 lines 00:11 < drazak> and thought it didn't post :S 00:11 < kanzure> fail 00:11 < genehacker> isn't there some version of autocad that does that? 00:11 < genehacker> i think that's patented code 00:11 < kanzure> http://media.photobucket.com/image/signals%20cross%204chan/Ragnor144/Fail%20Macros/GiraffeeFail.jpg 00:11 < fenn> oh noes patented code 00:11 < fenn> the sovereign nation of AutoCAD 00:12 < fenn> they are going to bust down my door with military robots 00:12 < genehacker> no 00:12 < genehacker> they're just going to sue you or something 00:13 < genehacker> woohoo fun winblows error time 00:15 < genehacker> now what does one use to bore out large diameter holes in aluminum rod stock? 00:16 < fenn> why not just buy the stock as tubing instead 00:17 < genehacker> can you buy cheap 1.5 foot lengths of 2 inch OD aluminum tubing for not expensive? 00:19 < genehacker> I need to check the machine shop... 00:19 < genehacker> I want to make a high power piston based water gun from hell 00:21 < fenn> just use a pneumatic cylinder 00:21 < genehacker> now where do I get those? 00:22 < genehacker> here's the deal 00:24 < genehacker> I want a dual diameter piston 00:24 < fenn> a telescoping piston? 00:24 < fenn> oh you could use a bike pump 00:25 < genehacker> hmmm.. on second thought I don't have an aircompressor 00:25 < genehacker> this might be impractical 00:25 < fenn> eh? 00:26 < fenn> mind sharing with the rest of the class? 00:27 < genehacker> http://www.sscentral.org/homemade/supercannon2.html 00:28 < genehacker> I was thinking something like this 00:29 < genehacker> but with a piston that has a large diameter that goes to a small diameter 00:29 < fenn> a tapered bore? 00:31 < genehacker> small diameter piston goes to a small diameter pipe filled with water connected to the nozzle 00:31 < genehacker> other end connects to pressurized air pipe 00:31 < fenn> oh, an intensifier 00:31 < genehacker> yeah 00:32 < fenn> don't kill yourself 00:33 < genehacker> well considering I'm not a very good machinist, I don't have much in the way of tools or transportation 00:33 < genehacker> it's probably not going to happen 00:33 < fenn> you can get air-powered hydraulic pumps from harbor freight 00:33 < fenn> also they sell a little air powered grease gun for $20 00:34 < genehacker> hmmm... 00:34 < fenn> but realistically 100psi is way too high for a squirt gun anyway 00:34 < genehacker> I want to spend less than $25 00:34 < fenn> hah 00:34 < fenn> buy a squirt gun 00:34 < genehacker> i did 00:34 < genehacker> this is for an assassin contest 00:34 < fenn> i don't know what that means 00:35 < genehacker> it means that people with waterguns are going to be a common sight in ETC 00:47 * ybit eats CIA-32 00:47 * CIA-32 tastes crunchy 00:47 < ybit> see, drazak, we're not boring 00:48 * ybit rubs CIA-32's tummy 00:48 < CIA-32> *purr* 00:49 < genehacker> hey don't abuse our bots 00:49 < drazak> lol 00:50 < ybit> genehacker: i think cia-32 doesn't like to be referred to as 'bot', it's slightly derogatory 00:50 < genehacker> they might have something that resembles the feelings of a flatworm! 00:50 * ybit thinks the pythonocc svn is going to build, not the one in kanzure's dir 00:52 < genehacker> I wonder if sufficiently fast programs would have something like senses 00:52 < ybit> gn i suppose :-\ 00:52 * ybit kills CIA-32 00:52 * CIA-32 dies 00:53 < genehacker> would they feel pain? 00:53 < ybit> yeah 00:53 * ybit kicks CIA-32 00:53 < CIA-32> ow 00:53 < ybit> see 00:53 < genehacker> though what is pain 00:54 * ybit suggests changing the topic to philosophy allowed between the hours of 2-5am 00:54 < genehacker> philosophy detected terminating 00:55 < ybit> so come back in an hour, and you might be in the clear 00:55 * ybit waves gn 00:55 < genehacker> I should just keep mapping out the reactions 00:56 * ybit hugs CIA-32 00:56 * CIA-32 hugs ybit 00:56 < genehacker> sleep is for weak people 00:57 < ybit> i'll remember that and call you when you drift off later this afternoon 00:57 < ybit> ..just to remind you 00:57 < ybit> third time's a charm: and i'm out 00:59 < genehacker> ok 01:15 < drazak> blah 01:15 < drazak> been staring at circuit diagrams all day 01:15 < drazak> and excel 01:15 < drazak> trying to part out this freaking amp 01:22 < genehacker> ugh 01:23 < genehacker> what does 3 h stand for with reference to chemical abbreviations 01:25 < genehacker> as far as I know combining two chemicals that don't contain phosphorus to make something with phosphorous is impossible 01:29 < genehacker> phosphine 01:29 < genehacker> it's gotta be phosphine 01:31 < drazak> what context 01:32 < genehacker> in synthesizing beta-cyanoethyl N,Nbis(diisopropylamino)chlorophosphine 01:33 < genehacker> from 01:33 < drazak> where does 3h come from? 01:33 < genehacker> i-Pr2EtN, 3 h, CH2-Cl2, 0 °C --> RT, 70-77% 01:33 < genehacker> it's gotta be phosphine 02:04 -!- wrldpc2 [n=benny@ool-ad03fe34.dyn.optonline.net] has joined #hplusroadmap 02:18 -!- any96311728 [n=someone@75-120-11-55.dyn.centurytel.net] has joined #hplusroadmap 02:31 -!- katsmeow-afk [n=someone@174.124.128.60] has quit [Nick collision from services.] 02:31 -!- any96311728 is now known as katsmeow-afk 02:58 -!- genehacker [i=genehack@wireless-128-62-63-12.public.utexas.edu] has quit [Read error: 110 (Connection timed out)] 04:54 < bkero> Anybody try doing some OCR recently? 04:54 < bkero> kanzure: ? 05:19 < fenn> why d0 you ask? 07:16 < kanzure> no not recently 07:51 -!- Netsplit orwell.freenode.net <-> irc.freenode.net quits: kardan 07:52 -!- Netsplit over, joins: kardan 08:36 -!- davidnunez [n=davidnun@209-6-203-217.c3-0.smr-ubr1.sbo-smr.ma.cable.rcn.com] has joined #hplusroadmap 09:43 -!- jonathan__ [n=jonathan@66-90-167-249.dyn.grandenetworks.net] has joined #hplusroadmap 10:46 -!- amaruk [n=amaruk@p4FDC21F8.dip0.t-ipconnect.de] has joined #hplusroadmap 10:48 -!- amaruk [n=amaruk@p4FDC21F8.dip0.t-ipconnect.de] has left #hplusroadmap [] 11:28 -!- wrldpc2_ [n=benny@ool-ad03fe34.dyn.optonline.net] has joined #hplusroadmap 11:28 -!- wrldpc2 [n=benny@ool-ad03fe34.dyn.optonline.net] has quit [Read error: 104 (Connection reset by peer)] 11:28 -!- wrldpc2_ is now known as wrldpc2 11:53 < ybit> was nalioth informing about cloaks for this channel? 12:00 < ybit> o i c, group registration 12:25 -!- Netsplit orwell.freenode.net <-> irc.freenode.net quits: kardan 12:27 -!- Netsplit over, joins: kardan 12:36 -!- Netsplit orwell.freenode.net <-> irc.freenode.net quits: kardan 12:36 -!- kardan [i=kardan@78.46.51.71] has joined #hplusroadmap 12:40 -!- jonathan__ [n=jonathan@66-90-167-249.dyn.grandenetworks.net] has quit [] 12:52 -!- dira [n=chatzill@de2-as1165.alshamil.net.ae] has quit ["ChatZilla 0.9.85 [Firefox 3.5.3/20090824101458]"] 13:17 -!- amaruk [n=amaruk@p4FDC0F29.dip0.t-ipconnect.de] has joined #hplusroadmap 13:18 -!- amaruk [n=amaruk@p4FDC0F29.dip0.t-ipconnect.de] has left #hplusroadmap [] 13:39 -!- dira [n=chatzill@de2-as1165.alshamil.net.ae] has joined #hplusroadmap 13:54 -!- amaruk [n=amaruk@p4FDC0F29.dip0.t-ipconnect.de] has joined #hplusroadmap 13:55 -!- amaruk [n=amaruk@p4FDC0F29.dip0.t-ipconnect.de] has left #hplusroadmap [] 14:30 -!- genehacker [i=genehack@128.62.60.15] has joined #hplusroadmap 14:47 -!- mason-l [n=x@202-89-188-136.static.dsl.amnet.net.au] has quit [Read error: 60 (Operation timed out)] 15:24 * ybit is looking for modular house designs 15:25 < ybit> will gradually expand the building as my limited income allows 15:25 -!- genehacker [i=genehack@128.62.60.15] has quit [Read error: 145 (Connection timed out)] 15:27 < kanzure> houses are for quitters 15:30 < ybit> yeah, modular warehouse, how 'bout that? 15:31 < Utopiah> yep, cf http://www.peopleofwalmart.com/?p=3914 15:31 < kanzure> shipping containers 15:33 < ybit> hah, i like the second comment fromt that link 15:33 < kanzure> i made a wrapper for cal3d 15:33 < kanzure> http://adl.serveftp.org/~bryan/pycal3d/ 15:36 < ybit> nice, and you included install notes 15:38 < ybit> http://www.containercity.com/riverside-building.html nice 15:39 < ybit> seeing some really neat designs using shipping containers, if the price is reasonable, i'm sold 15:40 -!- genehacker [i=genehack@wireless-128-62-60-15.public.utexas.edu] has joined #hplusroadmap 15:40 < ybit> ~$100 each, but it seems you have to buy in bulk 15:41 < ybit> e.g. http://cgi.ebay.com/20%60-shipping-cargo-storage-container-So.-California_W0QQitemZ140224168109QQcmdZViewItem 15:43 < genehacker> ybit are you plannin on making snowcrash style apartment 15:43 < genehacker> s 15:46 < ybit> more like a warehouse, no apartments 15:51 < genehacker> have you read snowcrash? 15:51 < ybit> though, if the hackerspace idea comes into fruitition, i don't have a problem with friends living there, it certainly wouldn't be much of a technical problem adding on another container 15:51 < ybit> no 15:52 < genehacker> read snowcrash 15:52 < genehacker> it's good 15:53 < ybit> genehacker: hows about you describe these apartments to me :) 15:56 < genehacker> http://www.technovelgy.com/ct/content.asp?Bnum=121 15:58 < AchiestDragon> ybit the shiping containers are sell at about £800 gbp on ebay , although the conversions cost upwards of £3000 depending what you want inside it 15:58 < ybit> genehacker: thanks for the link 16:09 < drazak> ybit: call around to railroads and shippers and stuff and see if htey have extra ones that they want to get rid of 16:26 < nykodemus> I both second and third the suggestion to read snowcrash 16:44 < ybit> nykodemus: that is not allowed my friend, second or third, but not both :P 17:01 < kanzure> http://adl.serveftp.org/~bryan/screenshots/2009-09-27-porrasturvat.png 17:08 < genehacker> kanzure why are you playing stair dismount? 17:08 < kanzure> i feel compelled to try to decompile anything that people don't offer sources to 17:09 < genehacker> are you going to use a search algorithm to find the highest possible score? 17:10 < kanzure> no the source isn't available 17:10 < genehacker> I have something that doesn't have the source 17:10 < genehacker> that is the only reason I don't use linux 17:11 < genehacker> my textbook reader 17:12 < kanzure> does it run under wine? 17:13 < genehacker> no 17:13 < genehacker> it needs .NET framework 3.5 17:13 < genehacker> and of course that won't work 17:14 < kanzure> oh then mono should be able to run it 17:15 < genehacker> what's mono? 17:15 < kanzure> sudo apt-get install mono 17:15 < kanzure> it runs .NET on linux 17:15 < genehacker> really? 17:15 < genehacker> ok 17:16 < genehacker> I'll try that when I boot up linux 17:17 < genehacker> if you feel compelled to decompile everything 17:17 < genehacker> I've got a whole bunch of fun stuff for you to decompile 17:41 < ybit> the cost is roughly 1.5kusd-2k like AchiestDragon mentioned 17:44 < ybit> but as a npo, i'm guessing these companies would sell at a reduced cost and take the tax write-off 17:46 < kanzure> i need a marketing drone 17:46 < kanzure> anybody in here into marketing? 17:50 * ybit quits blogging about building construction materials, though there are several ones which can be implemented cheaply: tire home, mud home, wood (from the mini forest that will be chopped down) 17:50 < ybit> kanzure: what are you looking to market? 17:52 < kanzure> me 17:53 < genehacker> that can be interpretted in many ways 17:54 < genehacker> step 1 of marketing, who do you want to sell to? 17:54 < genehacker> what your selling doesn't matter 17:54 < genehacker> with good marketing it can be sold 17:55 < genehacker> that's all you need to know 19:05 < fenn> ybit get one of these http://www.farmtek.com/farm/supplies/cat1;ft1_tension_fabric_buildings;ft1_clearspan_tension_fabric_structures.html 19:06 < ybit> that's neat 19:06 < ybit> guess the articles of incorporation need to filed soon before i start hitting up companies 19:16 < ybit> fenn: my question is how does it withstand highspeed winds during tornado season. 19:16 < ybit> how +well 19:17 < fenn> um. how well does anything withstand tornadoes? 19:18 < fenn> seems to me that the rounded ones would probably be the most robust structure in a wind storm 19:21 < fenn> you can also get a "wide" building which is shorter 19:24 < fenn> http://www.clearspan.com/fabric/structures/ext;Structures/Sizes.html 19:30 < fenn> http://en.wikipedia.org/wiki/Salt_Lake_Tabernacle#Construction 19:39 < fenn> you can get custom printed graphics 19:40 < genehacker> in color? 19:45 -!- ve [n=a@94-193-95-252.zone7.bethere.co.uk] has quit [Read error: 110 (Connection timed out)] 19:46 < fenn> you can get any color you want as long as it's blue 19:46 -!- ve [n=a@94-193-95-252.zone7.bethere.co.uk] has joined #hplusroadmap 19:48 -!- dira [n=chatzill@de2-as1165.alshamil.net.ae] has quit ["ChatZilla 0.9.85 [Firefox 3.5.3/20090824101458]"] 20:03 -!- wrldpc2 [n=benny@ool-ad03fe34.dyn.optonline.net] has quit [] 20:40 < kanzure> nice email from anders 20:40 < kanzure> good to see he's not totally dead 20:42 < drazak> does anyone know of any unity gain stable opamps that have low voltage requirements and are suitable for an audio amp in the ground position? 20:43 < genehacker> no, but I know of some fluidic sound amplification devices with good frequency response qualities 20:43 < drazak> I already have a design, I just need to pick an opamp 20:53 -!- mason-l [n=x@202.89.188.136] has joined #hplusroadmap 20:55 < kanzure> hello mason-l 20:55 < mason-l> Hello kanzure 20:57 < kanzure> huh docstrings are an optional parameter for swigging stuff. /me fixes 20:57 < kanzure> %feature("autodoc", "1") 20:57 < genehacker> http://hardware.slashdot.org/story/09/09/27/2020204/Revisiting-DIY-HERF-Guns?art_pos=4 20:58 < genehacker> I wonder if HERF guns will become more widespread if EEstor sells their capacitors to the public 20:59 < katsmeow-afk> TL081 or TL071 21:00 < katsmeow-afk> but you didn't define "low voltage" , so i dunno 21:58 < kanzure> in what package is gl/gl.h given? apt-file search isn't showing me anything 21:59 -!- idiot [n=idiot@pool-71-255-35-91.syrcny.east.verizon.net] has joined #hplusroadmap 21:59 -!- idiot is now known as Guest91727 22:02 < kanzure> hello idiot 22:11 < Guest91727> hello kanzure 22:19 < drazak> katsmeow-afk: TL071 sucks for audio 22:19 < drazak> katsmeow-afk: sure, the slew rate is fast enough, and it's like what, 30khz? it just doesn't sound good 22:23 < katsmeow-afk> where do you get the 30khz figure? 22:23 < katsmeow-afk> you want rail-to-rail +/- 15v ? 22:24 -!- genehacker [i=genehack@wireless-128-62-60-15.public.utexas.edu] has quit [Read error: 110 (Connection timed out)] 22:24 -!- Guest91727 [n=idiot@pool-71-255-35-91.syrcny.east.verizon.net] has quit ["Leaving"] 22:24 < katsmeow-afk> besides, you know you can put a simple gain stage after it? 22:27 < fenn> perhaps i'm an anti snob, but isn't just about any transistor more than fast enough for audio? 22:28 < katsmeow-afk> yeas, but few are linear all over their curve,, and a curve is by definition not linear 22:28 < katsmeow-afk> however, a decent opamp and any ole transistor is easily good enough for PA use 22:41 < drazak> katsmeow-afk: way lower than 15v, try 7.6v rail to rail, my audio opamp is a dual channel AD823, but they don't make a single channel version for my ground channel 22:41 -!- genehacker [i=genehack@wireless-128-62-60-15.public.utexas.edu] has joined #hplusroadmap 22:42 < katsmeow-afk> yeas, low voltage operation can be a pita, due to limited output swings and lockups 22:42 < drazak> yeah 22:43 < drazak> it's for a NiMH 9volt battery powered headphone amp 22:43 < katsmeow-afk> can you level shift your signal up and make a fake gnd at 3.8v? 22:44 < drazak> here, look at the schematic 22:44 < drazak> http://tangentsoft.net/audio/pimeta2/misc/sch-2.01.pdf 22:44 < katsmeow-afk> ? 22:45 < katsmeow-afk> umm, they call out al lthe parts numbers there for you 22:45 < katsmeow-afk> why ask us? 22:46 < drazak> because I'm not using all the same parts 22:46 < drazak> :P 22:46 < katsmeow-afk> IC2 already make a vcc/2 gnd for you 22:47 < drazak> right, the tle2426 22:47 < katsmeow-afk> i guess i don't understand the problem 22:47 < katsmeow-afk> [22:42] katsmeow-afk: way lower than 15v, try 7.6v rail to rail, my audio opamp is a dual channel AD823, but they don't make a single channel version for my ground channel 22:48 < drazak> right 22:48 < drazak> the ground channel takes a single channel opamp 22:48 < katsmeow-afk> what are you calling a "ground channel" ? 22:48 < katsmeow-afk> all those are using 2 opamps 22:49 -!- wrldpc2 [n=benny@ool-ad03fe34.dyn.optonline.net] has joined #hplusroadmap 22:49 < katsmeow-afk> oh, the IC2 itslef?? 22:49 < drazak> no, OPAG 22:51 < katsmeow-afk> http://www.google.com/search?q=%22low+voltage%22+%22single+supply%22+opamp 22:53 < katsmeow-afk> i understand the point of an opamp there, but i suspect you can get by with C3 C4 C5 alone 22:54 < drazak> 3-channel topology keeps headphone return currents from disturbing the signal ground 22:54 < katsmeow-afk> yeas 22:55 < katsmeow-afk> ok, use a dual or quad package in place of OPALRG$1, OPALRG$2 , OPAG , and the TLE2426 22:56 < katsmeow-afk> instead of what looks like 4 separate 8pin dips? 22:56 < drazak> it's 2 8 pin drops 22:56 < katsmeow-afk> IC2 is shown as 1/2 the chip, can't you use the other half for the OPAG circuit? 22:56 < drazak> the tle2426 comes in a to92 package 22:57 < drazak> and it's shown as 1/2 22:57 < katsmeow-afk> the tle2426 has "1/2" written on it, praps it's a different pack 22:57 < katsmeow-afk> or is it "1 of 2" , not 1/2 ? 22:58 < drazak> hold on 22:58 < katsmeow-afk> either way, use another for the OPAG ? 22:58 < drazak> use another tle2426? 22:58 < katsmeow-afk> yeas, you don't actually need gain there 22:59 < drazak> does it have opamp action? 22:59 < drazak> I don't know a lot about the tle2426 22:59 < katsmeow-afk> me either, but the OPAG - LMH6321 is all buffer, and vreference and current source/sink, not gain 23:00 < katsmeow-afk> it's headphones, it's hardly hifi 23:00 < drazak> uhm 23:00 < drazak> it's to drive my HD600's 23:00 < katsmeow-afk> ? 23:01 < drazak> hifi headphones 23:01 < katsmeow-afk> k 23:01 < katsmeow-afk> :-/ 23:01 < drazak> I'm hand matching resistors between left and right channel, etc 23:01 < drazak> it's not a crappy amp :P 23:01 < katsmeow-afk> oohhh 23:02 < katsmeow-afk> ok,, then, use another OPALRG , it's a dual-opamp in one pack? 23:02 < drazak> OPALR is a dual opamp, yeah, I don't know if the in/out pinouts are right to go in a dip socket for a single opamp 23:03 < drazak> I'll need to look at the datasheets 23:03 < katsmeow-afk> use one side for the OPAG, and a resistor string and the other side for the TLE24226 23:03 < drazak> dude 23:03 < drazak> I'm buying the circuit board 23:03 < drazak> I'm deciding how to populate it 23:03 < katsmeow-afk> either way, if you are substituting parts around from what's said on irc, you're going to redo the pcb layout 23:04 < katsmeow-afk> you can't drop in a dual opamp pack where it calls for a single, no way 23:04 < drazak> http://tangentsoft.net/audio/pimeta2/pguide.html#op-amps 23:04 < drazak> that's what I mean 23:05 < drazak> so I'm trying to pick a single channel opamp that has similar voltage requirements as the AD823 23:05 < katsmeow-afk> See below for comments on using a different type of chip in OPAG than in OPALR. 23:06 < drazak> yep 23:06 < drazak> I've read the whole thing :) 23:06 < drazak> "you may be forced to use a different opamp in OPAG than in OPALR" 23:08 < katsmeow-afk> well, they give parts numbers they recommend 23:10 < drazak> aye 23:10 < drazak> most of them aren't low voltage 23:11 < katsmeow-afk> but will they work at the low voltage, not are they speced for a low voltage as their max power 23:12 < katsmeow-afk> that gnd buffer is supposed to be operational at exactly 1/2 vcc, and not have any rail-to-rail swing 23:12 < drazak> yeah 23:12 < katsmeow-afk> lockup on power up is your only concern 23:14 < drazak> mhm 23:14 -!- Phreedom [n=quassel@195.216.211.175] has quit [Read error: 104 (Connection reset by peer)] 23:14 -!- Phreedom [n=quassel@195.216.211.175] has joined #hplusroadmap 23:16 < katsmeow-afk> i am sorry to say i disagree with a lot of his design there 23:16 < kanzure> http://fab.cba.mit.edu/academy/about/ 23:16 < kanzure> vocational tech school for the fab lab 23:17 < katsmeow-afk> i have found sonic differences (with even current buffers) in any resistance where he has R1 , above 100ohms 23:17 < katsmeow-afk> it's especially serious with fet input gain blocks where you are driving current to charge gate capacitances 23:18 < katsmeow-afk> the R and input capaciatance is it's own hf roll off 23:18 < katsmeow-afk> bipolar inputs aren't as bad for that, but then you get into offset and bias current requirements 23:19 < drazak> yeah 23:19 < katsmeow-afk> i've seen opamps bias up with signal, then drift down to 0v with no signal 23:19 < drazak> it's on parwith other portable headphone amps though 23:20 < genehacker> Marta Male Alemany? 23:20 < drazak> http://tangentsoft.net/audio/ppa/amp2/misc/schematic8.pdf for more highend 23:20 < katsmeow-afk> i once did a tape deck with flat responce 10hz to 25khz (metal high bias) , dc connection from tape head right to the output jacks, which sat at 0.000v , no offset 23:21 < genehacker> whoever they invited me to some event and never responded to my response 23:21 < katsmeow-afk> drazak, i'd use a wall wart, higher voltages, or series 2 "9v" batteries, eliminate the gnd generator, and have a wider choice of opamps 23:23 < drazak> katsmeow-afk: for at home use and while charging I'm going to use a decent power supply for it 23:23 < katsmeow-afk> 2 batteries will eliminate the need for input caps, etc 23:26 < drazak> decrease portability 23:26 < drazak> and the case for 2 batteries doesn't allow me to use a better pot, so it's not helping me with anything else 23:27 < katsmeow-afk> 2 batteries? you are tied to the audio cord anyhow 23:27 < katsmeow-afk> oh,, i didn'tknow the pot was a problem 23:28 < katsmeow-afk> too bad Fenchurch isn't in #seattlerobotics atm, he'd be who you could be talking to, it's his business 23:28 < drazak> hehe 23:30 < drazak> well, I'd prefer to use an ALPS RK27 instead of an ALPS RK097 23:30 < drazak> the RK27 is much, much better, and I could use better input caps 23:31 -!- Noahj [n=noah@ip98-182-59-157.ri.ri.cox.net] has joined #hplusroadmap 23:31 < kanzure> hey noah 23:32 < kanzure> we were playing around with opamp circuits 23:33 < Noahj> Ah, I think I might have one of those somewhere around here, I've never done anything with it 23:33 < katsmeow-afk> funny he doesn't say why not use ceramics in audio paths: they are temperature sensitive and microphonic 23:34 < drazak> katsmeow-afk: he does, other places 23:34 < katsmeow-afk> ok, i didn't see it on this page 23:35 < drazak> http://tangentsoft.net/audio/input-cap.html 23:36 < drazak> gah it's not that page either 23:36 < drazak> he says it somewhere 23:36 < katsmeow-afk> doesn't matter 23:36 < kanzure> Noahj: was wondering if you could blabber about fab academy 23:36 < Noahj> Hmm 23:36 < Noahj> The official spiel's a lot more informative than I am right now 23:37 < Noahj> http://fab.cba.mit.edu/academy/about/ 23:38 < katsmeow-afk> the specs on the buffer contradict what he says about loading the opamp output : http://focus.ti.com/lit/ds/symlink/buf634.pdf page4 shows less phase offset with heavier load 23:39 < drazak> katsmeow-afk: he says a couple places that the only ceramics you should ever have in audio are C0G, NP0 23:39 < drazak> I think in the page for working with cranky opamps 23:40 * katsmeow-afk nods 23:40 < drazak> and that those aren't ideal, but if that's all you have room to use and you need them 23:48 -!- genehacker [i=genehack@wireless-128-62-60-15.public.utexas.edu] has quit [Read error: 110 (Connection timed out)]