Op het internationale gedeelte gaat die nu voor $400 klik, ik bied je 350 euro, 400 inclusief voeding. E 350 = 0.58 btc (btc-e). Maak er 0.6 btc van en je mag'm hebben. PM me ff. intron |
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Ben wel klaar met m'n BFL en hij mag weg.
Hashrate ligt net iets onder de 60 GH/s,
heb'm een paar maanden aan gehad.
De kast is eraf geschroefd, dus de herrie valt
ook best mee. En er zit een Crossair CX 500M PSU
bij, nog speciaal door PsychoticBoy geleverd:)
Iemand een bod?
intron
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Received 50 A1 samples, thank you for that Zefir.  |
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Some eye candy, an A1 after reflow:  |
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Very nice! Found out I need something like this for powering hex•fury also:) And if you remove the polyfuse in the blue hub (that green thingy), you don't need to cut the red wire. |
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There are two version of the documenatation:
one with 0.4 mm pitch and with 0.5 mm pitch.
I was confused also, so I waited for the samples
to arrive before sending the boards out. And I
was wrong, had to redo the A1 footprint.
Can you provide the link to the updated pdf, and are there any other changes? No idea how to upload a PDF. Hope this helps:  |
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Well, this is more than a little disappointing. The datasheet is incorrect; the pad spacing is not 0.4mm it is 0.5mm.
Any chance we can get an updated and correct datasheet uploaded onto the Bitmine website?
Oh! my god.... I looked at my sample chips to measure. You are right. The gap is 3.0mm (6 * 0.5) between the seven pins. I'll have to stop making PCB. Modifications are needed.... Thank you for your information.  Will the next batch be correct? Or are the documents wrong? There are two version of the documenatation: one with 0.4 mm pitch and with 0.5 mm pitch. I was confused also, so I waited for the samples to arrive before sending the boards out. And I was wrong, had to redo the A1 footprint. |
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Intron, Cscape,
Very nice work! Just when i thought I've seen it all, you come a long and surprise me.
in your opinion, what are the possibilities this will become a standard with new ASIC chip designs from others?
Hopefully other ASIC competitors will take notice.
No DCDC converter with only two layer PCBs is a huge win in price reduction.
To be able to make a string design, the chip must provide for a method to shunt the current that is carried by the string when it is not in full operation. When you got that one right and have some means of level shifting of the signals going up and down the string it should be possible whith any chip. And Valery got that right:) |
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I really like the One String miner. Wish i had some bitfury chips right bout now. Is this what Dave was carrying with him at Inside Bitcoins Las Vegas?
Don't think so:) |
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1) Reset should be toggled for a relatively long time, at least one second!
--
Any idea why this is needed? To flush out all
start-up state (i.e. to clock out all random bits
stored in registers)?
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.
--
Please can you tell were this driver can be found?
Thanks in advance,
intron
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nice USb, but i dont understand why - it draws far too much power for a USB port, so for the effort of getting it to work it seems like a much easier idea to go with the one-string or other design that uses 12V and holds more chips
It takes about 2.5 Amps, you can power it from an USB hub. And it also has a seperate power input that feeds the bitfury ASICs. When this option is chosen then the USB has to power only the processor. And indeed, we were just playing around a bit...  |
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Fastest USB miner at this moment:
Doing 15+ GH sustained, hex•fury is running
from a 5.5 Volts supply.
intron
How much? PM-ed you. |
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Fastest USB miner at this moment:   Doing 15+ GH sustained, hex•fury is running from a 5.5 Volts supply. intron |
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Notification: Sample Chips delivered
According to tracking, most of the sample chips have already been delivered or are scheduled for delivery by end of today.
Some PM'd me about tracking number, which I think answering is obsolete meanwhile. If you do not get the chips by tomorrow, please contact me again and I'll provide you the tracking number.
Good Luck!
Samples received, thank you so much. Now let's see if we can get these beauties hashing:)  |
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Any news on the design competition?
Intermediate Results Relevant for DIYThe following is a short list of things tested and relevant for DIY projects: - PLL configuration working: arbitrary system clock selectable and usable
- AVDD must be 1.8V, input is not 3.3 V tolerant
- host SPI interface: level shifter from/to 1.8V required
- SPI chain termination: the last chip in the chain needs to have SDI_L and SDO_L connected to close the loop
- chips need to be HW reset (by pulling RESETn to ground) for proper operation
- hashing engines work, chip produces exactly the expected hashrate (number of engines * system clock)
- the initial cgminer driver published works as is
- chip is designed to dissipate ~70% through the PCB and 30% over top side, therefore heat-sink is mandatory
Thanks for clearing this up. |
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Thanks for the update zefir.
I have both a level shifter and the option to use an inline resistor to drop the 3.3V signal down to 1.8V on my test board similarly to how some Bitfury designs have implemented it. Have you investigated doing that, or just feeding 3.3V straight in?
I have all these three options on the prototype board:) The datasheet is less then conclusive I'm afraid. |
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Count us for samples too
Me too:) |
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Nice to see another product that will hit the market soon. But 0.67W/GH was achived by 55nm products so it's not that impressive anymore. Congratulations! EDIT: Can wait to lay my hand on these chips. String with 10 chips in series is very tempting It lacks an 'IOVDD' pin, setting the voltage levels of the output signals. So making a string out of it might be a bit more of a hassle. But I would love to try it of course:) intron |
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First samples of the CoinCraft A1 demonstrated working
Congrats!! Can we buy samples to build our own boards? I hardly can't wait...  intron |
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