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1  Bitcoin / Project Development / [ANN] Bitimax (BTX): Maximizing Peaceful Consensus. on: March 25, 2017, 04:24:30 AM
Hi All,
      Starting a new project. Need lots of help. The initial bare bones plan is below.

I need of Web designer, graphic designer, web developer, etc.
and lot of bloggers that are tired of all the contention.

Thanks for your time


Name: Bitimax (BTX)

Slogan: Maximizing peaceful consensus among individuals

Website: (Secured domain, no website yet)

Bitimax is an organization that builds and hosts communication tools for faster consensus discovery from a pool of competing ideas for desirable protocol change. Bitimax empowers anyone and everyone to express and promote their concepts. Once sufficient consensus is achieved, the technical community can go to work with higher probabilities of success. This organization is all about uniting individuals on commonality and diminishing the focus on group differences.

Q & A
Does the Bitimax organization innovate and/or maintain Bitcoin/Blockchain technology?
No. we innovate communication tools that allow anyone to express their well-formulated ideas for potential consensus victory; however, we plan to work closely with the technical community to help concept authors be advised on the complexity and feasibility of their endeavor.

Is this a potential answer to the poison generated within the Bitcoin community?
We hope so. To our cherished community, this is for you

Can this service speed up development of the Bitcoin protocol?
Absolutely! Engineering a viable and trustworthy solution to a Bitcoin improvement proposal takes considerable engineering time, peer review, and a lot of testing. To go through such a painstaking process without consensus is disheartening and a waste of time, money, and resources. Hopefully, with this service, consensus-worthy ideas will quickly be found, prioritized, and handed off to the technical teams.

How does it work?
We utilize well studied methods for brainstorming and collaboration among large groups: Multi-Voting, (Nominal Group Technique) NGT Voting, Nominal Prioritization, & Affinity Grouping/Diagramming.
These techniques are far superior to straight voting because it allows an idea that is favored by all, but not the top choice of any, to gain wide-spread consensus. These methods provide more unique ideas, more balanced participation from everyone, increased feelings of accomplishment, and greater satisfaction with idea quality and group efficiency. These methods help prioritize issues and they help save time by focusing only on ideas with the greatest potential.

Who votes?
Individual node operators, Bitcoin services & businesses, Bitcoin hodlers, services & businesses that accept Bitcoin, and Miners. As great as Bitcoin technology may be, without all these participants, it would have little to no value.

What is the process of submitting an idea?
Work in progress.
2  Bitcoin / Hardware / 14nM/16nM Chip Specifications on: October 31, 2016, 08:33:40 PM
Looking for Chip 14/16nM Specifications.

I understand their are some 3rd party projects going on with BW and Bitfurry chips.
We are NOT looking for chips.....YET, but the information would help solidify our miner design.

Anyone that is in a position and willing to help in this regards would be greatly appreciated.

If you want more Bitcoin Hardware variety, please bump and keep this thread active. Thanks!
3  Bitcoin / Hardware / Looking for Broken S9 Hash Board and Controller... Thanks! on: August 08, 2016, 06:19:35 PM
Looking for some broken hardware to build UHB boards similar to the following:

Universal Hash Board: Bitfury 28 nM "UHB_BF28NM"

Universal Hash Board: Bitmain 1384 "UHB_BM1384"


Update: Thanks to HolyScott at, I now have a Avalon 6 and Bitmain S7.

I'm still looking for a Broken S9 Hashboard and S9 Controller... Thanks!
4  Economy / Computer hardware / [WTB] BROKEN Avalon 6, Bitmain S7, Bitmain S9 on: August 02, 2016, 06:30:50 PM
[WTB] BROKEN Avalon 6, Bitmain S7, Bitmain S9

looking for one of each.

Need them for this project:

5  Bitcoin / Hardware / Universal Hash Board: Bitmain 1384 "UHB_BM1384" on: August 02, 2016, 06:18:14 PM

The "Universal Hash Board Standard" first introduced here:
Is now being applied to Bitmain's BM1384 for learning purposes.
It is our goal to apply this preliminary standard to as much hardware
as possible to make sure it can accommodate all possible
small ASIC string designs.

Universal Hash Board: Bitmain 1384 "UHB_BM1384"




Edit: The PCB layout needs rework after a few changes to the dimensions of the PCB and some small changes to the schematic.
          Files will be updated as soon as its complete. Done! Links updated as of 08/22/16

Looking for help. Anyone have some dead hardware they can donate to this cause? Looking for dead hash boards and controllers for
AVALON 6, S7 and S9.

Thanks for all the positive criticism.

Small preview of the electrical Spec's:
6  Bitcoin / Hardware / Universal Hash Board: Bitfury 28 nM "UHB_BF28NM" on: July 08, 2016, 04:42:48 AM

We've been working vigorously for the last several months to produce a workable Bitcoin mining "standard"
that would prevent the need to "re-invent the wheel" every time a new Bitcoin mining ASIC is released.
This would make all aspects of mining hardware reusable on future generations (except the “Hash Board”);
It would also be re-usable on ASICs from other vendors. The only requirement is that the chips are small
and “string capable”.

As we continue to work to finalize the "preliminary" release of this standard called the “Universal Hash Board”
standard, we have begun to apply its current outline and guidance to existing ASICs in an attempt to learn as
much as possible. The files presented below apply to Bitfury's 28 nM chip set.






Note: This design was done for learning purposes only. Nothing is guaranteed! All our work is presented for
potential benefit and inspiration to the Bitcoin community. We also desire to operate a 3rd party Bitcoin
Mining company as transparent as possible. Thank you.

FYI, I frequent these forums for causal moments of entertainment, but rarely sit down to write posts. Hope
you all understand. Please email me for anything you feel is important or critical. Please speculate among
yourselves on all the details and future of this endeavor. More will be released as soon as possible, but
remember, development is a slow painful birthing process.

~~~~~~A few other tidbits ~~~~~~~~~~
1) In a few weeks, we will publish a similar topic for Bitmain's BM1384 (aka Antminer S5).

2) We are looking for broken hardware to be donated for this cause. If you have one of the following to
spare, please email me and then send it our way!
   Antminer S7
   Avalon 6
   Antminer S9

3) Interested in joining?
   Looking for PCB Designer.
   Looking for 8bit Microchip PIC programmer.
       Please email me with your qualifications (or resume).

Note: Our operations currently run with little to no funding. All work is voluntary and comes without
promise or pay; however, active involvement may situate you in a position for hire with pay as we steadily
lift things off the ground over the next several months.
7  Economy / Collectibles / Selling Coin Collection on Ebay - 3% Discount in Bitcoin on: April 20, 2016, 12:37:15 AM
No Reserve. Low Starting Price.

8  Bitcoin / Bitcoin Discussion / Decreasing The Block Size (BIP # -1) on: March 05, 2016, 05:18:04 AM

Let me know what you think. Thanks for reading.

9  Bitcoin / Mining / BIP 100.2 - To Fee or Not to Fee: A Fresh Look at Bitcoin's Block Size on: November 12, 2015, 11:24:30 PM
Posted this in the main discussion board. Relevant to mining. Please check it out.

10  Bitcoin / Bitcoin Discussion / To Fee or Not to Fee: A Fresh Look at Bitcoin's Block Size on: November 12, 2015, 04:13:28 PM
To fee or not to fee, that is the question
A fresh look at the Bitcoin block size

Author: Michael Pickens
Date: November 10th 2015
BIP: 100.2
Many thanks to Jeff Garzik's and his BIP 100. He is an outstanding Bitcoin contributor, and he's had a positive influence on the creation of this BIP.

The 1 MB block size discussion has highlighted the inherent limitations to decentralized and heavily distributed blockchain technology; especially Bitcoin as it is implemented on a global scale. The heated debate has also highlighted the virtue of centralized systems; they are fast, cheap, scale easily, and very efficient. How do you compete with that? At Bitcoin's foundational layer, you simply don't. This realization has created a great reflection point for bitcoiners world wide. So then, what is Bitcoin's greatest value? Well, it provides a (financial) communication channel that is uncensored, transparent, global, available to all, robust, and incorruptible! What a priceless and precious tool; yet, it does come at a cost. The originators of Bitcoin had a mechanism for creating fair trade between those that use this invaluable service and those that provide it. It is called the Miner's Fee.

“The fees go to the miners to incentivize them to keep mining, which in turn keeps the Bitcoin network secure. They already get a reward of 25 bitcoins for each block they mine, but this reward halves every 4 years. The plan is that as the block reward diminishes over time, it will be replaced by transaction fees.” -

The reality is this; the method for assessing a “fair” fee is underdeveloped. There are no tools of communication between users and miners nor between miners themselves for deriving an appropriate fee value. Regardless of the fee paid, the same quality of service has been rendered almost every time (with the exception of spam transactions). As we look at this upper limit on the block size, does it not cause one to ponder over the current fee system? Isn't a “little” competition to get processed into the block chain in a “timely” manner a good thing? Not that we shouldn't increase the upper cap, because we should, but it should be done while taking a serious look into the nonexistent fee market. And maybe, just maybe, while improving the fee system the best solution for removing the cap size altogether will come into everybody's view.

So, it all boils down to defining a healthy yet simplistic relationship between the fee value, confirmation time, and the block size. The truth is bitcoin miners already have control over this relationship. It's just waiting for them to embrace it. They can already pick and choose what transactions to include and exclude from the blocks. So, the idea presented below is not a complete solution to the current block size issue; however, it is definitely a step in the right direction as it empowers the miners vs. simply giving them a few choices. Plus, there is no hard (or soft) fork involved!

Block3 Inclusion

The cubic function can be a concise way of expressing a relationship between block size and fee price. It has 3 vital elements: number constant, linear slope, and exponential rise. The number constant can influence a stable fee value during low transaction volume. The linear portion determines a gradual increase in fee price as transaction volume gains which in turn demands larger block sizes. The exponential part can create a flexible wall of resistance as the block size approaches magnitudes that are not healthy for a decentralized/distributed network, yet theoretically, it wouldn't create a hard limit.

   Y = aX3 + bX + c
   Y is the minimum fee/kB ratio for block inclusion
   X is the size of the block being mined
   a, b, c are the parameters determined by the miner. The first two parameters, a & b, are always
                       positive. Parameter 'c' can be positive or negative.

Now, on to implementation. It all starts with each miner determining the cubic function parameters a, b, and c that best express their perceived value of “Bitcoin as a service”. Then the following code will determine which transactions are included.

Pseudo Code:
Order all non-confirmed transactions by their fee/kB ratio into a list.
Reset block size X to 0.
Get first transaction on the list; Y = transactions' fee/kB ratio
While the following is true Y > (aX3 + bX + c )
      Include transaction into block
      Update the block size X
      Get next transaction on the list; Y = transactions' fee/kB ratio

Here's a “feel good” example with the following parameters for the cubic formula:
a = 3 x 10-12   b = 1.5 x 10-6        c = 3 x 10-4

The parameters that define this graph indicate that if the transaction volume can be satisfied with block sizes of 200 kB or less, then all transactions are included even those with no transactions fee. with block size demands between 200 kB and 600 kB there is a gradual almost linear increase, but afterward, the curvature of the parabola starts to kick in increasing the fees dramatically. Note, the parameters that the miners choose for this formula are dynamic; they can be adjusted often to accommodate external factors. What is really exciting about all this is that it adds meaning to the transaction fee. Before, it was more of an anti spam mechanism and a miner tipping service, but now, the fee can correlate with speed/quality of service.

It's a'block Time

The following graph gives a good visual representation of the price for blockchain participation (speed vs. fee/kB). Notice that on the fee/kB axis, it is not quantified, for that is also a function of transaction volume or demand from the users. It will be updating continuously throughout each day. 

The varying fee sizes per kB have been divided into several categories with descriptions of anticipated service quality. Again, this graph and these categories are more to convey a vision of how the fee market could develop into something healthy. The end result will more likely be some variation of what is understood here.

Fee Size:         Speed (Service Quality)
Cheapskate:      May never make it into the blockchain.
Cheap:         Could take a while. Small risk of indefinite exclusion.
Economy:       Time doesn't matter. Processed during low volume. Good value.
Slow:          Within one hour.
Fast:         Within ½ hour.
Expedite:              Next block.
Love those Miners:   Next block. Showing some appreciation to the miners.

Just a “miner” Communication Detail

The parameters selected for determining fees should be broadcast with each block solved. Every miner is going to have different and varying parameters and it is essential that they be communicated to the customer base for a robust fee market. How? What's the preferred way? The parameter data could be included in the block itself or the block could simply contain a hash of that data where it is then broadcast later and maybe through different channels if so desired. As each miner states their voice using the hashing power they control, bitcoin users will have a solid understanding of the fair trade value to communicate on the blockchain.

Fee Sharing
A powerful gesture of collaboration

The article “'Devastating' protocol flaw could paralyze Bitcoin system” written by Dan Goodin stated the following:

“As the currency grows into [full] maturity… the verification of other transactions will be Bitcoin's sole reward scheme. And therein lies the flaw that could represent a chief stumbling block.

With each participant rewarded only for verifying a proposed transaction, there will be little incentive for participants to broadcast transactions to others. Instead, they will want to keep the deals secret so they don't have to share the rewards with others.”

There is a nugget of truth from this article and the problem it highlights is echoed in the attempt to establish a relationship between block size, fee price, and quality of service. What miner in their right mind is going to limit the amount of transactions that are included in their block when money is on the line? The bitcoin mining network is not a homogeneous community, yet everyone has a vested interest in its overall success. What can be done?

There is only one solution to this! Short of a fork, I would be willing to share all the collected fees in a block with the coinbase addresses of the last 100 blocks. Are you up for doing the same? This would create a movement to reduce incentive for selfish mining. If enough miners join the movement to solidify a more homogenous community then that would be a powerful statement to all bitcoin developers scrambling for a non-existent bullet proof solution to the block size issue. In the end, there has to be a little bit of trust that enough miners want to do the right thing. Later, it could become protocol in the next update.

Artificially Decreasing the Block Size
Pathway to NO Block limit

Here's a novel suggestion. While “we the miners” demonstrate commitment to the overall success of the bitcoin/blockchain service, why not also demonstrate restraint in block size growth. For example, if enough miners select parameters that create exponential fee resistance around 0.5 MB block size, it wouldn't create a hard limit yet it would communicate confidence to the development community and the world that the block size growth issue is going to be handled just fine. Yes, this would contribute temporarily to higher fees, but is it not worth it to jump start the fee market and get this critical issue solved in a meaningful way?

So, is there a Fork?

In this BIP, there was no demand for a Fork, not even a soft one. But rather, information was presented to inspire the creation of tools that would empower the miners with the ability to fully express themselves in how to deliver their service. Tools that would open communication between miners and between miners and bitcoin users. Information to provoke thought and perception of the block size issue from a new angle. Ideas to invigorate a more homogenous mining community. As mentioned before, this is not “The Solution”, but rather a potentially positive step in the right direction. In my personal opinion, it is a necessary step before the proper resolution can be found to the block size issue.

So far, the majority of the solutions out there appear to default to a small increase in the block size limit now while working on a better solution in the future. If it comes to this, I'm personally in favor of a modest increase to 2MB.

A big thank you to all persons contributing and engaging the community in a positive manner.

 Slim's Bitcoin (
 Influential Leadership to Empower a New World
11  Bitcoin / Hardware / Standardized Mining Case Design (Open Source; DIY) on: October 24, 2013, 02:11:14 AM
It has been amazing the amount of engineering talent that has surfaced over the last
several months to produce Bitcoin mining hardware. Personally, it's been a little
frustrating to see things move so fast that most part-time/hobbyist engineers like myself
are forced to the sidelines. Still very anxious to contribute something that doesn't
become meaningless before it is finished. I'm convinced that an "open source Hardware
enclosure standard" could be a first great step in creating synergy between the efforts
of the many engineers that frequent this forum and be useful for the many years to

At this point there appears to be emerging two main mining hardware approaches:
        1) A few large expensive packages that milks the silicon die for every last hash
           it's worth. (e.g. KNC, BFL, Cointerra, etc.)
        2) Many small and cheap packages that run the silicon die near peak energy
           efficiency. (e.g Bitfury, Coincraft, Avalon, etc.)

The first approach requires alot more consideration for heat dissipation which may add
additional cost. A GPU form factor makes much since on many levels IMO because of all
the supporting hardware and enclosures readily available. See Mr Teal's example:

The large array of efficient ASICs has the potential of becoming the long term winning
solution IMO especially for those that live in hotter climates with expensive electricity. summed it up perfectly:
"Do you think that fitting the highest possible number of hashing units into a single,
500+ GH/s silicon die is the best solution? We don’t. Real life experience have shown
that the highest performance, lowest total system cost and greatest scalability are
achieved by large arrays of small and cool ASICs...

This case enclosure standard will cater more to the "large arrays of small and cool ASICs".

4U 19" Wide x 19" to 24" Depth. What is a good depth?
ATX12V PSU over a server PSU. Thoughts?
Port holes for a RPi and/or a Black Beagle Bone
3 fans in the front.

Please help make this a success. I'll be glad to work with anyone interested. For This
project, I plan to just help coordinate the efforts of those willing to get involved.

Some Case Examples:

12  Economy / Computer hardware / [WTS] - BFL BitForce 53+ GH/s - Failing Action: 95BTC on: July 11, 2013, 01:18:42 AM
Update: July 15 2013
OK, So bitmit is down at a very critical time for me; so,
back to selling a few miners directly here in the forums.

If escrow is desired, buyer pays for escrow service. I would like to start my own escrow so if anyone
wants to chance it with me it would be greatly appreciated to start building a
more well known reputation.

As previously mentioned, I would really like to find out what the market rate is for
these; so, back to failing action style. I'll update the thread daily with new lower
prices when there is no market (PM messaging) activity going on.

Currently up for sale: 53+ GH/s BFL BitForce miner

Willing to Ship World Wide.
Buyer pays for shipping for anything over $100.
No returns accepted.
Willing to help with any reasonable situation.


Well, it sure seams the first one I sold was a steal for the buyer
Potentially another good deal on the this one:
Bid Starts at 90BTC

Ships Tuesday Morning!


Have a few Bitforce Singles that I would like to sell.

I have a good reputation on Bitmit. Check out "Allten".

Willing to do escrow through bitmit if desired.
I would put up a bitmit listing, but buyers are not following through with payment.

Start price $ 7,000 USD. Drop's $100 every day until sold.


13  Bitcoin / Hardware / Recieved 50GH BFL Single Today! on: June 17, 2013, 09:49:34 PM
I guess making multiple orders the first day and paying extra on shipping has paid off.
Received BFL single today and took some screen shots to share.
I'll admit that I did receive an email when it shipped from BFL asking me to share PICs and I agreed.
This has made my day. Good luck to all those still waiting. I'm still waiting for many other BFL Miners I have
ordered for friends, family, and myself.

Forgot to mention: I had lent my kill-o-watt meter to a friend so I will have to get back on that one.

Powered with two PCI-e power connectors (same as the GPUs)

Stop at Fry's on the way home to get a good power supply.

Here's the miner setup and working away. approximately 50+ GHs (average looks around 54, but
need to let it run longer to know for sure)

14  Bitcoin / Hardware / bASIC BFL Miner Development (4 Chips) on: June 16, 2013, 04:23:51 AM
Building a miner for the BFL ASIC chips.

Design will be shared with the community.

It will use 4 chips that will fit snugly underneath an off the shelf CPU FAN

The PCB will have the ability to expand to 8 chips using a customized water block.

Also, going to make a PCB with a socket similar to this for testing purposes.

Don't want to mount DUDs on a board

Plan to do all this in eagle. If you want to work on a similar design, please let me know and
we can share work. Programmers and coders neaded. This is something I do on the side and
can't pull it all off.


15  Bitcoin / Group buys / BFL Chip Credits - Buy, Sell, or Trade Here on: June 16, 2013, 12:08:42 AM
Interesting Program by BFL.

Have BFLC Credits and want to sell, post here with the number of credits and how much.

Want to buy BFLC Credits make a post with an offer.

Want to provide escrow, PM me with a link and I will add it to the OP.
Note: I will not vouch for any escrow service. I will list all that apply.

Current worth of BFLC Credit is $25

This is a great opportunity to support your preferred 3rd party BFL ASIC manufactures.

If you just want to get rid of your credits, please send them to

I'm currently offering $2.00 Dollars for a credit Paid in BTC.
My offering will rise over time to a maximum of $15.00

Update: Dropped the price a dollar.
Update: No longer buying. Thanks.


Escrow by "CanaryInTheMine"

16  Bitcoin / Hardware / DIY PCB with AVALON: "The Quarter Stick" - Needs Help! on: March 30, 2013, 06:07:13 PM
Final Update (Nov 18 2013):
So, I have finally taken care of the butterfly infestation at my home.
Then it was time to get back to this project and see where it should go.
I spent the weekend building up a few boards with the chips that "daemondazz" had sent (Thank You!).
Everything works except the Nonce capture from the Avalon Chip. The design needs
revised for a better clock filter from the incoming data out of the Avalon. It might as well be revised
for the 55nM chip as well. I believe there is already a good solution found in this open source design
for a clock filter:

Honestly, I don't have the drive to complete this project only because a single chip miner
seem so pointless given how the mining world has shaped up so far so fast and where it is going.
I would like to dedicate my energies on helping out on some other Open Source projects.

If there is anyone that has the ambition to finish this, PM me. I'll be happy to send
all the Eagle cad Files and materials to help out. This would include x10 55nM Avalon
sample chips and I also have a pickit 3 available if needed. I would also be happy
to share what I've learned and insights that would help get this project to the finish line faster.
Just hoping for the right person that can put the drive back into this and make it happen.


DIY Setup for a little over $200:

PCB Version A0 (Build 0). All files found here:

Low Cost DIY ASIC Miner

This thread is intended for the development of a very low cost DIY open source
ASIC miner based on Avalon's chips. Hopefully, it will inspire other Bitcoin ASIC
manufactures to offer their chips as well.

* Get ASICs in the hands of the masses ASAP.

* Create the cheapest solution possible. The lowest possible price is the goal.
The $ per hash ratio is not expected to be the best.

* Make it simple enough that anyone with a DIY spirit can assemble one of these with
some simple low priced tools.
DIY manufacturing may be an avenue to get these out much faster.
Expect a few hours assembly time per board.

*Make the PCB design that is not only DIY friendly, but mass production friendly as well.
It will use surface mount technology.

*Inspire more ASIC Bitcoin Mining manufactures to pop up all over the world (Decentralization).
ASIC manufacturing in general is the most complicated production process in the world.
IMO, the best thing for Bitcoin would be for ASIC Bitcoin Manufactures to be decoupled from
final product production; or at least offer their chips as well on top of their final products.

Specifications (subject to change):
* USB power source is all that is required.
* Utilizes a single Avalon ASIC
* 256+ MH/s
* 2 Watt maximum power usage
* TYPE A USB Male option on either side of the PCB
* Type B USB Female option
* More to come

*Burnin - He is a serious manufacture of Bitcoin mining equipment. He has committed to helping
with the open source software/firmware to make this project function. He has started an official
thread for his miners and it's worth checking out:

*Zefir - He is preordaining Avalon ASICs in smaller quantities for anyone interested:
Zefir is committed to helping this low cost DIY project be successful by making a small quantity
of chips available for ordering and development.

All of you! An open source design also means its open to anyone. Feel free to take the initiative
to help out in your own way. Please don't get discouraged as it may take time to figure
out where your talents fit in best. I have received an overwhelming quantity of supportive emails
and also many request to help out. I wasn't prepared for that, but now, I would like to make
a list of anyone that wants to get involved here and what they would like to bring to the table.
Shoot me ANOTHER email and I will add you name here.

"Someone42" who was the inspiration and pioneer in hardware wallets has offered his help here.
"Burnin" has also offered his help, but is also very busy as he is preparing his own miner.

Allten's Commitment:
I will engineer the schematic and the PCB. As soon as the chip specifications are available, I will
release within a week a preliminary design for feedback. I will personally manufacture enough
of these to get them in the hands of all those that will be helping with firmware/software development.
After that, a detailed tutorial will be made on how to order and produce these by yourself.

Important note: I do not want to become a distributor for these for the simple fact I would like
to have time available for other projects I'm passionate about. This is a golden opportunity for anyone
or a few people to become distributors of DIY kits and already assembled miners. I will assist anyone
to get set up for this once I've completed the tutorial.

Sending some coins would be very helpful and greatly appreciated.
What will donations cover? Enough to order the parts and PCBs for the initial boards used for development.
All extra will be used to drive bounties for software/firmware development.
I get the feeling that many have ordered chips with confidence that there will be a PCB solution
readily available before the ASICs arrive. If that is the case, consider donating up to 5% of
what you invested in chips to this project. It would sure help hurry it a long! Much of the bounty portion
may go to "burnin" as his code development for the controller portion will be shared with this project and
he is most heavily invested to make it work along with his product ASAP.
17  Bitcoin / Bitcoin Discussion / [ANN] BitSafe Hardware Wallet Now Shipping on: March 13, 2013, 02:29:13 AM
BitSafe Hardware Wallet Now Shipping

Huge milestone reached with the Open Source Bitsafe Hardware Wallet.
There are multiple Bitsafes assembled and ready to ship.

Bitsafe is a 100% Open Source Hardware Wallet including all manufacturing files; this will guarantee price
competitiveness with the opportunity for anyone to become a distributor or even mass-producer. This is
important as it will allow buyers to purchase from the source they trust most.

The initial goal with Bitsafe was not to produce the "perfect" hardware, but rather prove the concept with several
dozen prototypes that would inspire hopeful software developers to get involved. As client developing commences,
our next goal is to create a more perfect, more versatile, and mass-producible hardware wallet for under $25.00.
It can be done! However, if you would like a hardware wallet now then please consider ordering one of these first
Bitsafes. They actually turned out really nice and your support would be appreciated.

If you are a serious about improving the Bitsafe project
, but would like a discount for your
efforts then please purchase the following listing at Bitmit and I'll gladly work with you! Don't forget to purchase
supporting development hardware as well if you think you may need it:
Ignore the price, Bitmit works fine with small partial payments. It was just my way of getting others to ignore
a listing that would get them a cheaper Bitsafe.

To our amazement, the hardware wallet start ups and advancements from other sources came fast and hard after a
serious commitment was made to get involved in hardware security. This is great news! The more developers the
merrier! All this activity will surely make many hardware security solutions for Bitcoin a reality. Whatever happens,
there is a serious commitment by those involved with Bitsafe to make a cheap open source hardware security
solution a reality. Please get involved today.

Donations to cover previous and future hardware expenses:
Any extra will go towards bounties. Thanks!
Check back every once and a while as I post more information and pictures

Great explanation from Someone42 where this project is likely to go:

is the firmware / source code posted somewhere like github or is it not developed yet??

I have been developing the firmware. You can get it from: It's in a state of flux, as the surrounding Bitcoin infrastructure changes. At the moment I'm working on implementing an interface based on protocol buffers, so that I can make it "Trezor compatible" (eg. see

Can you explain how it works?  How do you use it?

Advantages over a mass market encrypted USB stick?

Here is an entirely fictitious depiction of what is possible:
  • You open multibit and plug the BitSafe into your computer. One of your greyed-out wallets becomes highlighted.
  • You navigate to, and purchase something for 1.815 BTC. Multibit handles the Bitcoin URI and gives you a payment prompt.
  • After approving multibit's payment prompt, a light flashes on the BitSafe and "Send 1.815 BTC to" appears on the OLED display.
  • You press the "approve" button on the BitSafe and the relevant Bitcoin transaction propagates to the rest of the Bitcoin network.

During this story, there is no opportunity for malware to intercept your private keys. Private key storage and transaction signing is done entirely on the BitSafe. Malware does not even have the opportunity to redirect funds to another address; using a proposed payment protocol (see, addresses and amounts are signed by the merchant (in this case, authenticated by the BitSafe and displayed on its OLED display.

It gets better than this. You could encrypt your wallet so that if you accidentally lose the BitSafe, any finders will have a harder time accessing your wallet. "Deluxe" versions of the BitSafe might include a USB port which will allow you plug in a USB keyboard. You could then enter passphrases without fear of (software) keyloggers. Maybe you could even use this keyboard to enter a brainwallet passphrase; the Deluxe BitSafe generates, uses, and erases the brainwallet independently of the host computer.

This looks like a great product.  I have only 1 question:

What happens to my keys & bitcoins if I loose the device or it stops working because my dog chewed on it?
Currently, the firmware implements a deterministic wallet based on the proposed BIP 0032 standard. So you would be able to do a wallet backup by writing a series of letters/numbers on a piece of paper. You would presumably place this paper in a physically secure location (eg. safe). If you lose the BitSafe or it breaks, you can entirely restore the wallet from this piece of paper.

Note: Someone42 was the first person to have a proof-of-concept prototype. His original work and
continued developments can be found here:

Loading and Updating The Firmware:

Open Source Hardware and Software Files (Bitsafe 1.0)
18  Bitcoin / Hardware wallets / [Off-topic part] [ANN] Trezor: Bitcoin hardware wallet on: January 22, 2013, 05:38:31 AM
. . . Mike now goes on to reinvent representative democracy.

Haha, thanks Smiley Actually that's an old interest. Here's a paper I wrote about 6 years ago:

It covers how to use secure hardware to build a new kind of democracy where votes can be delegated by topic up a tree of representatives. I think these days people call it "liquid democracy". I never did anything with the idea. The paper talks about smart cards but Trezor style devices are a better fit.

Mike. That was a really neat article!
Truly among great minds. I feel humbled.
This was one of my motivations that got me started on the Bitsafe HW Wallet project.
It's so nice to see it on paper.
19  Bitcoin / Project Development / [BOUNTY PAID] BitSafe Hardware Wallet Logo on: January 10, 2013, 03:22:12 PM
Bounty paid and logo maid.


Main Bitsafe thread:

20  Bitcoin / Project Development / BitSafe Hardware Wallet Development on: November 24, 2012, 08:28:40 PM
Bitsafe Hardware Wallet Development:

New Thread with new discussion and direction:
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