From: Bryan Bishop <kanzure@gmail•com>
To: Andrew <onelineproof@gmail•com>, Bryan Bishop <kanzure@gmail•com>
Cc: Bitcoin Dev <bitcoin-development@lists•sourceforge.net>
Subject: Re: [Bitcoin-development] Scaling Bitcoin with Subchains
Date: Wed, 27 May 2015 21:34:28 -0500 [thread overview]
Message-ID: <CABaSBay22Xse0ubsEWQ-g9o+UmCqz3KeV8fKhoBUXC+Dg+s8bQ@mail.gmail.com> (raw)
In-Reply-To: <CAL8tG=m8kjPT8e5KsyhoGA4ni7Y9VeR=enX24MQVG4Kh0LnBKA@mail.gmail.com>
[-- Attachment #1: Type: text/plain, Size: 3027 bytes --]
On Wed, May 27, 2015 at 9:16 PM, Andrew <onelineproof@gmail•com> wrote:
> You should also keep in mind the big picture when it comes to
> decentralization. If the hard drives (or tapes) can only be produced by a
> small number of large companies like Western Digital or Seagate, then you
> can't really count those for a decentralized system. A truly decentralized
> system would have the devices needed to participate in (and verify) the
> system be easily created by a regular user of the system without relying on
> a central power. So for example, the hard drives needed to store the
> bitcoin transaction records should be able to be produced at a regular
> person's home on a 3D printer starting from just the raw materials. I don't
> know how close we are to this ideal, but just pointing out that it needs to
> be considered. This is also a reason why I like that Bitcoin uses the
> simple SHA sum for mining instead of a more complicated function such as
> scrypt. It makes it easier for small scale entities to understand and to
> produce the ASIC miners.
I am a huge fan of do-it-yourself at-home ASIC manufacturing. The original
4004 and earlier devices are within the scope of what could be accomplished
in a home environment. The homecmos project is an interesting glimpse at
these possibilities. Relevant-scale mining will most likely never be an
option for home manufacturing, but bitcoin wallets and other devices can
definitely be etched by hand or using maskless projector lithography.
Here's what the homecmos group was up to:
https://code.google.com/p/homecmos/
http://homecmos.drawersteak.com/wiki/
http://diyhpl.us/~bryan/papers2/optics/photolithography/DIY%20fabrication%20of%20microstructures%20by%20projection%20photolithography.pdf
LCD projection lithography:
http://diyhpl.us/~bryan/papers2/optics/photolithography/Cell%20micropatterning%20using%20photopolymerization%20with%20a%20liquid%20crystal%20device%20(LCD)%20commercial%20projector%20-%20Itoga%20-%202003.pdf
http://diyhpl.us/~bryan/papers2/optics/photolithography/Development%20of%20microfabrication%20technology%20with%20maskless%20photolithography%20device%20using%20LCD%20projector%20-%20Itoga%20-%202010.pdf
http://diyhpl.us/~bryan/papers2/optics/photolithography/Second-generation%20maskless%20photolithography%20device%20for%20surface%20micropatterning%20and%20microfluidic%20channel%20fabrication%20(using%20an%20LCD%20projector).pdf
DMD lithography:
http://diyhpl.us/~bryan/papers2/optics/photolithography/Maskless%20microscopic%20lithography%20through%20shaping%20ultraviolet%20(UV)%20laser%20with%20digital%20micromirror%20device%20(DMD)%20-%202013.pdf
http://diyhpl.us/~bryan/papers2/optics/photolithography/A%20maskless%20photolithographic%20prototyping%20system%20using%20a%20low-cost%20consumer%20projector%20and%20a%20microscope.pdf
There's actually a method of doing this with conventional camera roll film:
https://groups.google.com/d/msg/diybio/5hpQXZ6hFKY/baGNfY_-Wx8J
- Bryan
http://heybryan.org/
1 512 203 0507
[-- Attachment #2: Type: text/html, Size: 5480 bytes --]
next prev parent reply other threads:[~2015-05-28 2:34 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-05-20 2:55 Andrew
2015-05-25 18:15 ` Mike Hearn
2015-05-28 2:16 ` Andrew
2015-05-28 2:34 ` Bryan Bishop [this message]
2015-06-13 14:39 ` Pieter Wuille
2015-06-13 17:55 ` Andrew
2015-06-14 6:55 ` Martin Schwarz
2015-06-15 17:05 ` Andrew
2015-06-15 17:09 ` Pieter Wuille
2015-06-15 17:15 ` Jeff Garzik
2015-06-16 18:17 ` Peter Todd
2015-06-16 18:43 ` Andrew
2015-06-16 19:04 ` Andrew
2015-06-15 17:18 ` Mike Hearn
2015-06-15 18:00 ` Andrew
2015-06-16 15:23 ` Andrew
2015-06-15 18:01 ` Jeff Garzik
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=CABaSBay22Xse0ubsEWQ-g9o+UmCqz3KeV8fKhoBUXC+Dg+s8bQ@mail.gmail.com \
--to=kanzure@gmail$(echo .)com \
--cc=bitcoin-development@lists$(echo .)sourceforge.net \
--cc=onelineproof@gmail$(echo .)com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox