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From: Bryan Bishop <kanzure@gmail.com>
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Cc: Bitcoin Dev <bitcoin-development@lists.sourceforge.net>
Subject: Re: [Bitcoin-development] Scaling Bitcoin with Subchains
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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
--001a11c371d6e46c7805171b321a
Content-Type: text/html; charset=UTF-8
Content-Transfer-Encoding: quoted-printable
<div dir=3D"ltr"><div class=3D"gmail_extra"><div class=3D"gmail_quote">On W=
ed, May 27, 2015 at 9:16 PM, Andrew <span dir=3D"ltr"><<a href=3D"mailto=
:onelineproof@gmail.com" target=3D"_blank">onelineproof@gmail.com</a>></=
span> wrote:<br><blockquote class=3D"gmail_quote" style=3D"margin:0px 0px 0=
px 0.8ex;border-left-width:1px;border-left-color:rgb(204,204,204);border-le=
ft-style:solid;padding-left:1ex">You should also keep in mind the big pictu=
re when it comes to decentralization. If the hard drives (or tapes) can onl=
y 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 i=
n (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 mate=
rials. I don't know how close we are to this ideal, but just pointing o=
ut that it needs to be considered. This is also a reason why I like that Bi=
tcoin uses the simple SHA sum for mining instead of a more complicated func=
tion such as scrypt. It makes it easier for small scale entities to underst=
and and to produce the ASIC miners.</blockquote></div><br>I am a huge fan o=
f 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 enviro=
nment. The homecmos project is an interesting glimpse at these possibilitie=
s. Relevant-scale mining will most likely never be an option for home manuf=
acturing, but bitcoin wallets and other devices can definitely be etched by=
hand or using maskless projector lithography.</div><div class=3D"gmail_ext=
ra"><br></div><div class=3D"gmail_extra">Here's what the homecmos group=
was up to:</div><div class=3D"gmail_extra"><a href=3D"https://code.google.=
com/p/homecmos/">https://code.google.com/p/homecmos/</a></div><div class=3D=
"gmail_extra"><a href=3D"http://homecmos.drawersteak.com/wiki/">http://home=
cmos.drawersteak.com/wiki/</a></div><div class=3D"gmail_extra"><a href=3D"h=
ttp://diyhpl.us/~bryan/papers2/optics/photolithography/DIY%20fabrication%20=
of%20microstructures%20by%20projection%20photolithography.pdf">http://diyhp=
l.us/~bryan/papers2/optics/photolithography/DIY%20fabrication%20of%20micros=
tructures%20by%20projection%20photolithography.pdf</a></div><div class=3D"g=
mail_extra"><br></div><div class=3D"gmail_extra">LCD projection lithography=
:</div><div class=3D"gmail_extra"><a href=3D"http://diyhpl.us/~bryan/papers=
2/optics/photolithography/Cell%20micropatterning%20using%20photopolymerizat=
ion%20with%20a%20liquid%20crystal%20device%20(LCD)%20commercial%20projector=
%20-%20Itoga%20-%202003.pdf">http://diyhpl.us/~bryan/papers2/optics/photoli=
thography/Cell%20micropatterning%20using%20photopolymerization%20with%20a%2=
0liquid%20crystal%20device%20(LCD)%20commercial%20projector%20-%20Itoga%20-=
%202003.pdf</a></div><div class=3D"gmail_extra"><a href=3D"http://diyhpl.us=
/~bryan/papers2/optics/photolithography/Development%20of%20microfabrication=
%20technology%20with%20maskless%20photolithography%20device%20using%20LCD%2=
0projector%20-%20Itoga%20-%202010.pdf">http://diyhpl.us/~bryan/papers2/opti=
cs/photolithography/Development%20of%20microfabrication%20technology%20with=
%20maskless%20photolithography%20device%20using%20LCD%20projector%20-%20Ito=
ga%20-%202010.pdf</a></div><div class=3D"gmail_extra"><a href=3D"http://diy=
hpl.us/~bryan/papers2/optics/photolithography/Second-generation%20maskless%=
20photolithography%20device%20for%20surface%20micropatterning%20and%20micro=
fluidic%20channel%20fabrication%20(using%20an%20LCD%20projector).pdf">http:=
//diyhpl.us/~bryan/papers2/optics/photolithography/Second-generation%20mask=
less%20photolithography%20device%20for%20surface%20micropatterning%20and%20=
microfluidic%20channel%20fabrication%20(using%20an%20LCD%20projector).pdf</=
a><br></div><div class=3D"gmail_extra"><br></div><div class=3D"gmail_extra"=
>DMD lithography:</div><div class=3D"gmail_extra"><a href=3D"http://diyhpl.=
us/~bryan/papers2/optics/photolithography/Maskless%20microscopic%20lithogra=
phy%20through%20shaping%20ultraviolet%20(UV)%20laser%20with%20digital%20mic=
romirror%20device%20(DMD)%20-%202013.pdf">http://diyhpl.us/~bryan/papers2/o=
ptics/photolithography/Maskless%20microscopic%20lithography%20through%20sha=
ping%20ultraviolet%20(UV)%20laser%20with%20digital%20micromirror%20device%2=
0(DMD)%20-%202013.pdf</a><br></div><div class=3D"gmail_extra"><a href=3D"ht=
tp://diyhpl.us/~bryan/papers2/optics/photolithography/A%20maskless%20photol=
ithographic%20prototyping%20system%20using%20a%20low-cost%20consumer%20proj=
ector%20and%20a%20microscope.pdf">http://diyhpl.us/~bryan/papers2/optics/ph=
otolithography/A%20maskless%20photolithographic%20prototyping%20system%20us=
ing%20a%20low-cost%20consumer%20projector%20and%20a%20microscope.pdf</a><br=
></div><div class=3D"gmail_extra"><br></div><div class=3D"gmail_extra">Ther=
e's actually a method of doing this with conventional camera roll film:=
</div><div class=3D"gmail_extra"><a href=3D"https://groups.google.com/d/msg=
/diybio/5hpQXZ6hFKY/baGNfY_-Wx8J">https://groups.google.com/d/msg/diybio/5h=
pQXZ6hFKY/baGNfY_-Wx8J</a></div><div class=3D"gmail_extra"><div><br></div><=
div class=3D"gmail_signature">- Bryan<br><a href=3D"http://heybryan.org/" t=
arget=3D"_blank">http://heybryan.org/</a><br>1 512 203 0507</div>
</div></div>
--001a11c371d6e46c7805171b321a--
|
