[ANN] Bitfury is looking for alpha-testers of first chips! FREE MONEY HERE!

vs3

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I have a tray of chips and other bitfury gear left over for sale :

Quote from: vs3 on November 03, 2014, 02:21:53 AM

I have a tray of 260 BitFury chips from the second revision (that's still Gen-1) for sale. Those are the same ones which had reported over 4GH/s. For the sake of perfectionism I'd say you should expect to achieve over 3.5GH with those when pushed, and when running on "power saving mode" should do easily below 0.3-0.4W/GH

I am selling it as a full unopened tray. I am not interested in breaking it apart and will not be selling individual chips.

Quote from: vs3 on November 03, 2014, 01:35:36 AM

I have a BitFury M-card v3.0 + H-Board PCI v2.2 with heatsink for sale.

If that matters to anyone - they're brand new, never used, never powered, still in their original packaging from punin (from bitfurystrikesback.com). Those are leftovers from a previous project that never took off and I don't see any point of keeping them around to collect dust.

I also have the Raspberry PI with the original SD card as preloaded by BFSB (which is also in its original box and has never been powered). I don't insist on selling the RasPI as I can still use it for other purposes, but if you want it - it's yours.

This is just the essential piece. Please see the full posts for more pictures and details.

Taugeran

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CCNA: There i fixed the internet.

Quote from: pinkfloyd11 on October 27, 2014, 02:20:36 PM

Hi, how you have obtained 3.65 GH? Have you used mcp2210 usb to spi o other chip? Thanks

The 3.65+Gh/s per chip requires a xcellent cooling for sustained and long term operation.

To get said performance each chip will need to be supplied with 3.75-4A @ 0.96-1.075V with very low ripple voltage of preferably pk-pk less than 15mV

pinkfloyd11

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Hi, how you have obtained 3.65 GH? Have you used mcp2210 usb to spi o other chip? Thanks

[gadget]

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as posted in the NanoFury thread, I've got some Bitfury v2's for sale. Open to trades, pm me if interested

Tyger

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Maybe 5 or something, 2 or 3 rev1 and some rev2's

pinkfloyd11

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Hello

there is anyone that sell bitfury chips?

Thanks in advice

Tyger

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That should be good enough if it keeps running like that, if the speed go's down after some time your cooling does not cut it.

Taugeran

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CCNA: There i fixed the internet.

Quote from: adib on July 04, 2014, 02:52:32 PM

Quote from: Taugeran on July 04, 2014, 01:12:40 PM

Quote from: Tyger on July 04, 2014, 04:57:08 AM

The rev2 requires good cooling in order to work properly

How do you define properly and good cooling?

I have a Rev.2 chip nanofury running at 3.65G with no active cooling and the stock heatsink Tongue

Hand soldered btw

Me too, but id does need a fan to go to 56 osc bits

56 bits 3.65G 0.955V core voltage 0.25% error natural convection

adib

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Quote from: Taugeran on July 04, 2014, 01:12:40 PM

Quote from: Tyger on July 04, 2014, 04:57:08 AM

The rev2 requires good cooling in order to work properly

How do you define properly and good cooling?

I have a Rev.2 chip nanofury running at 3.65G with no active cooling and the stock heatsink Tongue

Hand soldered btw

Me too, but id does need a fan to go to 56 osc bits

Taugeran

hero member

Activity: 658

Merit: 500

CCNA: There i fixed the internet.

Quote from: Tyger on July 04, 2014, 04:57:08 AM

The rev2 requires good cooling in order to work properly

How do you define properly and good cooling?

I have a Rev.2 chip nanofury running at 3.65G with no active cooling and the stock heatsink Tongue

Hand soldered btw

Tyger

full member

Activity: 141

Merit: 102

The rev2 requires good cooling in order to work properly

pinkfloyd11

newbie

Activity: 56

Merit: 0

Hi at all

I notice that when bitfury rev2 start I had great HW Error.
It slowly go down in a few minutes.

How can I avoid this?

1)Use big capacitor on power supply?
2)Use soft start at power on?

Now that I had end test I need to acquire rev2 chip but main sell site is down.
Can you help me?

Thanks

pinkfloyd11

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Activity: 56

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Hi at all
I notice that when bitfury chip start, there is great hardware error.

After few second it slowly begin to go down.

Do you think that is better prolong soft start time of Vcore?

If not, how i can reduce it?

Thanks

pinkfloyd11

newbie

Activity: 56

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Hello

are many days that http://www.bitfurystrikesback.com/ is offline.

Where I can acquire bitfury II generation chips?

Thanks

vs3

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Quote from: pinkfloyd11 on May 19, 2014, 06:44:42 AM

Hi

then follow above schematics label if i remove R5 R8 R4 and Q1

and short pin 9 and 13 of MCP2210 I should test ONLY SPI COMMUNICATION BETWEEN PC AND MCP2210.

Question: GP5 is an input? What is it pourpose? I need to remove R7 also?

Thanks

UPDATE1:

At this URL:

http://www.microchip.com/wwwproducts/Devices.aspx?product=MCP2210#developmentTools

under "Documentation and Software" there is SPI TERMINAL that should work after removed the above components and create a short between MOSI and MISO. Correct?

Yup - even if you leave the resistors it should still work if you short the MCP2210 pins. Those resistors would be pretty weak and the MCP can easily overpower them for your purposes.

GP5 is being used as both input and output. That's the SCK override (so that you can send the reset sequence to bitfury chips - you can read some more about how it works on the github wiki page).

As for that terminal program - I've never tried it so I can't really tell for sure. It seems like it should work though.

pinkfloyd11

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Activity: 56

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Hi

https://i.imgur.com/uusRYySl.png

then follow above schematics label if i remove R5 R8 R4 and Q1

and short pin 9 and 13 of MCP2210 I should test ONLY SPI COMMUNICATION BETWEEN PC AND MCP2210.

Question: GP5 is an input? What is it pourpose? I need to remove R7 also?

Thanks

UPDATE1:

At this URL:

http://www.microchip.com/wwwproducts/Devices.aspx?product=MCP2210#developmentTools

under "Documentation and Software" there is SPI TERMINAL that should work after removed the above components and create a short between MOSI and MISO. Correct?

vs3

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Activity: 622

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Quote from: pinkfloyd11 on May 19, 2014, 03:56:41 AM

which is program equivalent to putty?

There is no such.

But you can easily adapt the nf1init to do a test like that for you.

By the way - I suspect something being off with your oscilloscope image - the "0" shouldn't be 0.5V
Either you have some kind of a short somewhere that is causing it, or it might be the oscilloscope itself interfering with the schematic.

vs3

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Activity: 622

Merit: 500

Quote from: KNK on May 19, 2014, 03:11:41 AM

Quote from: pinkfloyd11 on May 18, 2014, 10:07:32 AM

When I use RS232 I connect both RX and TX pin together (microprocessor side). In this manner I can check if chip like max232 work correcty simply receive echo on terminal program like putty.
Which is the equivalent test in this case?
Thanks

Connecting MISO to MOSI

Nope, that's not going to work.

You need a strong (very low impedance) pull down to GND, otherwise the MISO pin will stay up in the air.

You'll basically have two 2k resistors pulling down (R8 and R6), and one (R4) pulling up to 3.3V. So your "0" will be 1.1V.
And that would be an ideal case - if you get the transistor to open. But since it won't open at that low voltage (it needs 1.5V+) ... you won't get anything.

Edit: It WILL work if you connect MOSI/MISO on the MCP2210 pins (before all resistors/transistor).
It will NOT work if you do that on the bitfury side (after resistors/transistor).

pinkfloyd11

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which is program equivalent to putty?

KNK

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Activity: 692

Merit: 502

Quote from: pinkfloyd11 on May 18, 2014, 10:07:32 AM

When I use RS232 I connect both RX and TX pin together (microprocessor side). In this manner I can check if chip like max232 work correcty simply receive echo on terminal program like putty.
Which is the equivalent test in this case?
Thanks

Connecting MISO to MOSI

Topic: [ANN] Bitfury is looking for alpha-testers of first chips! FREE MONEY HERE! (Read 176664 times)