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Showing 20 of 124 results by giorgiomassa
Re: [ANN][MCM] Mochimo | Quantum-Proof Cryptocurrency | Official Announcement [ANN]
Interesting, been reading the whitepaper and now looking forward to see the source to Trigg's PoW algorithm which is still missing, unfortunately.
Re: PhotonicMining having pretty big claims, 125 TH/s for 10,000 USD
By the way it may seem obvious by now but the fact they took our picture and shopped in a light bulb logo speaks for itself, stay miles away from this as it's 100% a confirmed scam and we have nothing to do with that. I'm serious!
Re: PhotonicMining having pretty big claims, 125 TH/s for 10,000 USD
Very original scam 
, they would deserve to be paid just for the creative approach they had, my new favorite after cryoniks.com !
Next one could probably be telepathy based, or maybe single-atoms IC like the one from IBM https://www.youtube.com/watch?v=oSCX78-8-q0
, they would deserve to be paid just for the creative approach they had, my new favorite after cryoniks.com !Next one could probably be telepathy based, or maybe single-atoms IC like the one from IBM https://www.youtube.com/watch?v=oSCX78-8-q0
Re: [CLOSED] Bitmine CoinCraft A1 28nm chip distribution / DIY support
The initial bring up 2 Chip Wasp A1 in hand... pick and place and re-flow ongoing. Room for 4 chips... 6 unlikely.
Wow good work guys!!
Re: [CLOSED] Bitmine CoinCraft A1 28nm chip distribution / DIY support
Thank you Zefir for handling this process, as for all the DIY people we wish you a great success with your designs and thanks for all the feedback given, we are working on fixing the reference design files and committing them to the git repository soon.
The base files for building the OpenEmbedded/Yocto-based rpi image will also be committed soon so that everybody willing to develop forks based on it is very welcome to do so (and share back)
The base files for building the OpenEmbedded/Yocto-based rpi image will also be committed soon so that everybody willing to develop forks based on it is very welcome to do so (and share back)
Re: [OPEN] Bitmine CoinCraft A1 28nm chip distribution / DIY support
Just FYI you should check our github repository for the latest datasheet with the final IC package specification, please don't take in consideration datasheet versions earlier than 1.0.A because they are preliminary.
An update with more accurate electrical specifications and updated registers will be released soon.
An update with more accurate electrical specifications and updated registers will be released soon.
Re: [HALTED] Bitmine CoinCraft A1 28nm chip distribution / DIY support
With solid cooling we managed to run 3 chip at 91-93 GH/s stable for 3-4 hours.
With our test software and firmware it seems that this is the limit is here.
The strange is that we pushed the voltage up to 0.88 V in order to make it stable .
With our test software and firmware it seems that this is the limit is here.
The strange is that we pushed the voltage up to 0.88 V in order to make it stable .
That's normal, this version of the IC package has about 10% IR drop due to bonding wires used inside the IC, production chips will be better.
Re: [ANN] Technobit HEX8A1 - 6/8 chip Coincraft A1 board
The board is working stable @ 90+ GHs ( about 30+ GHs per chip) 8-10 hours already
Here is the preliminary look of the miner with cooling
Here is the preliminary look of the miner with cooling
Great achievement!!! Congratulations
Re: [HALTED] Bitmine CoinCraft 28nm chip distribution / DIY support
Happy to hear that some of you already got the samples! Remember that these are from a pilot run of the IC packaging, our guys in China have done several further optimizations in the meantime like the glue and the wires used inside the IC, also we did tweak some parameters with the foundry for future wafers, so the chips are going to be definitely much better in production run (coming probably next week already) than these samples.
Sorry that I fail to be active here on the forum but we are heavily debugging this baby in our labs these last days (and nights). Here are some hints we've found out that you should be aware of:
1) Reset should be toggled for a relatively long time, at least one second!
2) We tested both with 12 MHz and 16 MHz reflock, zefir's excellent driver can easily be used to program relatively any refclock within the specs given in the datasheet.
3) Not a news but the chip is veeeeery sensitive to VDD ripples, try to keep them between 50-70 mV maximum.
4) Heat sink is needed both on top and on bottom side. As for the top, a small BGA heat sink should be enough, you can experiment and as long as you keep the surface temperature to < 50°C it shouldn't have problems.
5) Suggested level shifters to be used for interfacing to anything that hasn't 1.8V I/O is TI TXS0104
Anything else I'll try to address it here
Good luck!
Sorry that I fail to be active here on the forum but we are heavily debugging this baby in our labs these last days (and nights). Here are some hints we've found out that you should be aware of:
1) Reset should be toggled for a relatively long time, at least one second!
2) We tested both with 12 MHz and 16 MHz reflock, zefir's excellent driver can easily be used to program relatively any refclock within the specs given in the datasheet.
3) Not a news but the chip is veeeeery sensitive to VDD ripples, try to keep them between 50-70 mV maximum.
4) Heat sink is needed both on top and on bottom side. As for the top, a small BGA heat sink should be enough, you can experiment and as long as you keep the surface temperature to < 50°C it shouldn't have problems.
5) Suggested level shifters to be used for interfacing to anything that hasn't 1.8V I/O is TI TXS0104
Anything else I'll try to address it here
Good luck!
I got the difficulty calculator out.
http://mining.thegenesisblock.com/a/22bd1742ff
put 4000 GH
March delivery
it doesn't return ROI. Am I missing something?
Brian
http://mining.thegenesisblock.com/a/22bd1742ff
put 4000 GH
March delivery
it doesn't return ROI. Am I missing something?
Brian
March is incredibly optimistic, they will never make it earlier than April, maybe even later. Nobody will ever ROI it that late
Re: Official Avalon mining rig clones thread from bitmine.ch (NOW SHIPPING)
Re: BFGMiner 3.6.0: modular ASIC/FPGA, GBT, Strtm, RPC, Lnx/OpnWrt/PPA/W64, HBR/KLN
Dear all,
I'm trying to make an old, V1.0 board based on Intron's design which is very similar to BFSB's 450 GH/s miner. It has 16 Bitfury on a card and 16 card slots, the only difference is that instead of having an I2C selector for which card the SPI bus should talk to, it has a long chain of 16*16=256 Bitfury chips and it's attached to a RPI SPI port.
I modded the driver-bfsb.c file in order to scan only for one slot (the first and only, which is supposed to have 256 chips) but only 99 chips are detected! I tried to swap slots, use spare cards but nothing, the autodetection always stops at 99 chips. It is driving me crazy because there doesn't seem to be any "maximum chips" constant neither in the libbitfury.c nor in driver-bfsb.c, so I can't find where this limit comes from!
Can anybody help me or suggest me where to look at or had a similar problem?
Thanks in advance!
I'm trying to make an old, V1.0 board based on Intron's design which is very similar to BFSB's 450 GH/s miner. It has 16 Bitfury on a card and 16 card slots, the only difference is that instead of having an I2C selector for which card the SPI bus should talk to, it has a long chain of 16*16=256 Bitfury chips and it's attached to a RPI SPI port.
I modded the driver-bfsb.c file in order to scan only for one slot (the first and only, which is supposed to have 256 chips) but only 99 chips are detected! I tried to swap slots, use spare cards but nothing, the autodetection always stops at 99 chips. It is driving me crazy because there doesn't seem to be any "maximum chips" constant neither in the libbitfury.c nor in driver-bfsb.c, so I can't find where this limit comes from!
Can anybody help me or suggest me where to look at or had a similar problem?
Thanks in advance!
Re: [HALTED] Bitmine CoinCraft 28nm chip distribution (December W50, 42.5BTC/THps)
Mini-rant from our EE about the latest chip spec update:
1. Why are the designs less specific now Bitmine for the A1 chip?
2. Why haven't you specified the top-to-bottom pad distance, or completely specified the position of the 0.2mm wide pads that carry the signals. Why have you done this? Was it on purpose? Worrying very worrying.
Please note your package has pads only 0.2mm wide and by not specifying your position this leaves us open to losing half of EVERY pad, if we are off in our guesses by only 1/10th of a millimeter. Only 100 microns, right? Please note that adds to the chips professed tolerance in your positioning of 50 microns. This is shocking. You need to include ALL the dimensions in the picture and table as soon as possible.
3. In response to a request to move the signals to allow for a ground escape between pins 8 & 9, you have doubled down by newly assigning pin 8 to Vdd (pin 9, a long vertical pad that forms the other side of the requested escape, is also Vdd). And, unfortunately, the pinout drawing is only related to the package drawing, in shapes. We should be happy that, at least, you fixed their pin naming to match the descriptive table that accompanies the drawing but we need Bitmine to really put out documents that are helpful
4. We will not be hand assembling A1 chips to the boards. These chips require robotics to have any chance at all and forget about hot-air-rework - if one of these chips is failing, we will have to scrap the whole board, at worst, or ship it with blue-wires and degraded capability at best.
5. Your promise of replacement chips for failed ones won't begin to cover the costs of discarding the whole board. We are going to design in a physical bypass for every chip, even though that will reduce our density by 20% or more in order to protect those doing DYI and others who buy from us.
6. At this point given what we are learning from Bitmine we expect to have two-three re-spins of boards with these chips, before we get the footprint, solder stencil, and reflow curves right. That's four iterations before production... please Bitmine help us reduce that if at all possible by providing some decent chip specs. We want to have a reasonably good chance to succeed with your chips.
Thanks,
The Wasp Team
1. Why are the designs less specific now Bitmine for the A1 chip?
2. Why haven't you specified the top-to-bottom pad distance, or completely specified the position of the 0.2mm wide pads that carry the signals. Why have you done this? Was it on purpose? Worrying very worrying.
Please note your package has pads only 0.2mm wide and by not specifying your position this leaves us open to losing half of EVERY pad, if we are off in our guesses by only 1/10th of a millimeter. Only 100 microns, right? Please note that adds to the chips professed tolerance in your positioning of 50 microns. This is shocking. You need to include ALL the dimensions in the picture and table as soon as possible.
3. In response to a request to move the signals to allow for a ground escape between pins 8 & 9, you have doubled down by newly assigning pin 8 to Vdd (pin 9, a long vertical pad that forms the other side of the requested escape, is also Vdd). And, unfortunately, the pinout drawing is only related to the package drawing, in shapes. We should be happy that, at least, you fixed their pin naming to match the descriptive table that accompanies the drawing but we need Bitmine to really put out documents that are helpful
4. We will not be hand assembling A1 chips to the boards. These chips require robotics to have any chance at all and forget about hot-air-rework - if one of these chips is failing, we will have to scrap the whole board, at worst, or ship it with blue-wires and degraded capability at best.
5. Your promise of replacement chips for failed ones won't begin to cover the costs of discarding the whole board. We are going to design in a physical bypass for every chip, even though that will reduce our density by 20% or more in order to protect those doing DYI and others who buy from us.
6. At this point given what we are learning from Bitmine we expect to have two-three re-spins of boards with these chips, before we get the footprint, solder stencil, and reflow curves right. That's four iterations before production... please Bitmine help us reduce that if at all possible by providing some decent chip specs. We want to have a reasonably good chance to succeed with your chips.
Thanks,
The Wasp Team
Hi,
Thanks for pointing these things out to us. Please rest assured that nothing has been made on purpose, it is in our obvious interest to help users and OEMs to build devices based on our ASIC, if it wasn't we wouldn't have released the specifications at all.
We forwarded your inquiries to our IC packaging house who's now updating the drawing with the missing quotes. The pins have been spaced a bit more in order to have more than 0.2 mm spacing between the pads on the footprint, as this could cause manufacturing issues when using 70um copper boards (which is a good thing given the very high currents involved). We also asked for footprint and solder paste recommendations.
A new specification will be published as soon as we have it,
Thanks
Re: [HALTED] Bitmine CoinCraft 28nm chip distribution (December W50, 42.5BTC/THps)
Just to let you all know, the updated and final specifications of the CoinCraft A1 have been committed to github.
Soon we'll also commit a reference design and cgminer's driver source code.
For anybody that had questions, we tried to address them with our updated datasheet. Shouldn't this be the case, please don't hesitate to ask and I'll try to address the question here.
Thanks!
Soon we'll also commit a reference design and cgminer's driver source code.
For anybody that had questions, we tried to address them with our updated datasheet. Shouldn't this be the case, please don't hesitate to ask and I'll try to address the question here.
Thanks!
Re: [OPEN] Bitmine CoinCraft 28nm chip distribution (December W50, 42.5BTC/THps)
On topic: Weren't more A1 specs supposed to drop today?
Yes sorry about the delay, the updated A1 specs will definitely be released today.
Okay, specs are now on github: https://github.com/bitmine-ch/bitmine
v 0.1.B:
-Updated IC package to newest version.
-Updated PINOUT list.
-Removed old references to RESP_BIT.
Re: [OPEN] Bitmine CoinCraft 28nm chip distribution (December W50, 42.5BTC/THps)
On topic: Weren't more A1 specs supposed to drop today?
Yes sorry about the delay, the updated A1 specs will definitely be released today.
Re: [OPEN] Bitmine CoinCraft 28nm chip distribution (December W50, 42.5BTC/THps)
Sorry about that, we're going to update the info very soon, also we did some last minute changes to the packaging which wasn't finalized yet but now is to achieve even more power supply pin pad area.
Tomorrow a new version of the datasheet will be released with the required information!
Btw, IOs are all 1V8 and there's a pin for VREF (but there's no info on it in the first verisone of the datasheet yet).
Tomorrow a new version of the datasheet will be released with the required information!
Btw, IOs are all 1V8 and there's a pin for VREF (but there's no info on it in the first verisone of the datasheet yet).
Our existing customers that bought Batch #1 Avalon clone, now have the option to opt for our upgrade plan.
At Bitmine, customer loyalty is of the utmost importance, thats why our existing customers always come first. If you are lucky enough to own a batch #1 unit of Bitmines Avalon clone, you will be entitled to receive the following upgrade offer:
* A coupon worth 10% discount on any new purchase of the new generation, CoinCraft-based units.
* A special priority queue for the delivery of your order, you will be among the very first people to receive the units you ordered!
* Worldwide free shipment (value up to $500 per unit)!
Please note that you will receive your personal upgrade coupon by e-mail; the coupon is personal and non-transferable and has to be used within 10 days, otherwise it will be void. This special offer is valid only for Bitmines existing customers that have paid for and received an Avalon-based clone out of batch #1.
At Bitmine, customer loyalty is of the utmost importance, thats why our existing customers always come first. If you are lucky enough to own a batch #1 unit of Bitmines Avalon clone, you will be entitled to receive the following upgrade offer:
* A coupon worth 10% discount on any new purchase of the new generation, CoinCraft-based units.
* A special priority queue for the delivery of your order, you will be among the very first people to receive the units you ordered!
* Worldwide free shipment (value up to $500 per unit)!
Please note that you will receive your personal upgrade coupon by e-mail; the coupon is personal and non-transferable and has to be used within 10 days, otherwise it will be void. This special offer is valid only for Bitmines existing customers that have paid for and received an Avalon-based clone out of batch #1.
Re: [ANN] Bitfury is looking for alpha-testers of first chips! FREE MONEY HERE!
and add all the centers that will be shut down by governments/law enforcement in the not so far future.
Yeah, with the US and the EU being the most risky places in the world to see this happening.
Re: [OPEN] Bitmine CoinCraft 28nm chip distribution (December W50, 42.5BTC/THps)
Hi there!
We would be interested in making a board. Is there a chance to get samples and any type of unfinished documentation on chips ASAP?
Anyway we do not plan just to make a clone of what will be in documentation but add something to the product...
Let me know...
We would be interested in making a board. Is there a chance to get samples and any type of unfinished documentation on chips ASAP?
Anyway we do not plan just to make a clone of what will be in documentation but add something to the product...
Let me know...
That's what we're encouraging the users to do, there will be a best board design contest where the best 3 designs will be awarded with very interesting prizes!
Regarding the samples, I'm afraid there won't be any because we managed to pull out from the first pilot run of the foundry all the needed chips we need for the units and the chip sales of December, so you're basically getting them as soon as we get them too.