[ANN] US/North American Bitfury sales NEW STOCK ***NOW SHIPPING***

[goxed]

But notice my observation about cards with and without caps here:  https://asktom.cf/index.php?topic=287590.msg3390730#msg3390730

I haven't noticed that problem myself, running 7 original boards with 8 "new" boards in one rig right now..  Very stable.

   You got lucky and I did not get lucky ordered 5 Hboards.  I got one dead and 4 other shut off about 10 minutes and get very hot.

I am having trouble with one of my new v1 H-boards as well shorting out my whole rig. I don't notice anything damaged or anything smelling funny either. I've tried many ways to troubleshoot the problem.

My Raspberry PI got shorted out, a diode on the backside burnt out. I had upgraded from v1 Mboard over to v2.3 Mboard. It lasted just 5 minutes or so before burning out. Now back to v1 Mboard. I think the PI does not like being fed power through the pins, and rather expects a micro-usb plug.

[Soros Shorts]

My Raspberry PI got shorted out, a diode on the backside burnt out. I had upgraded from v1 Mboard over to v2.3 Mboard. It lasted just 5 minutes or so before burning out. Now back to v1 Mboard. I think the PI does not like being fed power through the pins, and rather expects a micro-usb plug.

I am not sure if the version of the M-board matters. A month ago my RPi lost its GPIO functionality when I powered down a v1 M-board. I wonder if putting a decoupling capacitor between the GPIO power pin and ground would help?

[goxed]

My Raspberry PI got shorted out, a diode on the backside burnt out. I had upgraded from v1 Mboard over to v2.3 Mboard. It lasted just 5 minutes or so before burning out. Now back to v1 Mboard. I think the PI does not like being fed power through the pins, and rather expects a micro-usb plug.

I am not sure if the version of the M-board matters. A month ago my RPi lost its GPIO functionality when I powered down a v1 M-board. I wonder if putting a decoupling capacitor between the GPIO power pin and ground would help?

Exactly same thing happened. I desoldered the diode, but GPIO functionality is gone. The rPI cannot detect any h-Card. Did your GPIO functionality return? I guess I will order a new PI.

[goxed]

Basically the component that blew out is this  (D17). It makes sense, I had just powered cycled the M-board, when this guy probably sensed transient voltage, and started destroying itself. After a few minutes magic white smoke.

http://www.littelfuse.com/products/tvs-diodes/surface-mount/smbj.aspx
Surface Mount TVS Diode
tvs diode
Web definitions

    A transient-voltage-suppression diode is an electronic component used to protect sensitive electronics from voltage spikes induced on connected wires. The device operates by shunting excess current when the induced voltage exceeds the avalanche breakdown potential.

[-Redacted-]

My Raspberry PI got shorted out, a diode on the backside burnt out. I had upgraded from v1 Mboard over to v2.3 Mboard. It lasted just 5 minutes or so before burning out. Now back to v1 Mboard. I think the PI does not like being fed power through the pins, and rather expects a micro-usb plug.

I am not sure if the version of the M-board matters. A month ago my RPi lost its GPIO functionality when I powered down a v1 M-board. I wonder if putting a decoupling capacitor between the GPIO power pin and ground would help?

Part of the problem with powering the Pi from the GPIO pins is that there is no over-voltage protection there - a spike on the m-board's 5V line will destroy the Pi.  Ask me - I've got an m-board sitting here that smoked two of them in a matter of days.

Powering the Pi from the GPIO pins is, by the way, NOT recommended....

[goxed]

My Raspberry PI got shorted out, a diode on the backside burnt out. I had upgraded from v1 Mboard over to v2.3 Mboard. It lasted just 5 minutes or so before burning out. Now back to v1 Mboard. I think the PI does not like being fed power through the pins, and rather expects a micro-usb plug.

I am not sure if the version of the M-board matters. A month ago my RPi lost its GPIO functionality when I powered down a v1 M-board. I wonder if putting a decoupling capacitor between the GPIO power pin and ground would help?

Part of the problem with powering the Pi from the GPIO pins is that there is no over-voltage protection there - a spike on the m-board's 5V line will destroy the Pi.  Ask me - I've got an m-board sitting here that smoked two of them in a matter of days.

Powering the Pi from the GPIO pins is, by the way, NOT recommended....

Ha! Part of the problem looks like the spike protection circuit (the TVS diode). Apparently it smokes up when it senses transient power from the 5V out lines on the GPIO headers.

To be on the safe side, I recommend de-soldering D17, the black TVS diode on the back of PI, near the micro-USB plug and green fuse. I have removed it from my other working rPI, and it seems to be pretty happy since last one day.

[BenTuras]

Exactly same thing happened. I desoldered the diode, but GPIO functionality is gone. The rPI cannot detect any h-Card. Did your GPIO functionality return? I guess I will order a new PI.

Before you do, measure the 12V at the end of the M-board.
I was measuring 4V and the pi also didn't see any H-card.
I replaced the psu and all was ok again.
(I didn't have a blown diode on the rpi)

[goxed]

Exactly same thing happened. I desoldered the diode, but GPIO functionality is gone. The rPI cannot detect any h-Card. Did your GPIO functionality return? I guess I will order a new PI.

Before you do, measure the 12V at the end of the M-board.
I was measuring 4V and the pi also didn't see any H-card.
I replaced the psu and all was ok again.
(I didn't have a blown diode on the rpi)

Which points on the M-board exactly? Thanks
My 12V rails measure 11.98V and the PSU power usage is 550W at the wall on a rPI that works.
With the rPI with broken GPIO, the 12V rails measure 12.2V, power usage is 70W, and rPI does not detect a single chip / h-board. The rPI boots up and networking works.

[BenTuras]

Exactly same thing happened. I desoldered the diode, but GPIO functionality is gone. The rPI cannot detect any h-Card. Did your GPIO functionality return? I guess I will order a new PI.

Before you do, measure the 12V at the end of the M-board.
I was measuring 4V and the pi also didn't see any H-card.
I replaced the psu and all was ok again.
(I didn't have a blown diode on the rpi)

Which points on the M-board exactly? Thanks
My 12V rails measure 11.98V and the PSU power usage is 550W at the wall on a rPI that works.
With the rPI with broken GPIO, the 12V rails measure 12.2V, power usage is 70W, and rPI does not detect a single chip / h-board. The rPI boots up and networking works.

I measured it at the ground and 12V holes above bank 4 on the m-board.

[jspielberg]

Do you have a download link for the RPi image?

I hope Dave will post the SD image for RPi somewhere so we can revive the miner in case the SD card die ...

I know this is old, but I didn't see a link in the thread.

Has an official location for the Rasberry Pi August V1 image been posted by Dave anywhere? 
My sdcard died last night (all LEDs light up... no network connectivity).

[goxed]

Do you have a download link for the RPi image?

I hope Dave will post the SD image for RPi somewhere so we can revive the miner in case the SD card die ...

I know this is old, but I didn't see a link in the thread.

Has an official location for the Rasberry Pi August V1 image been posted by Dave anywhere? 
My sdcard died last night (all LEDs light up... no network connectivity).

https://dl.dropboxusercontent.com/u/43738391/2013-Aug-29_BitfuryRasPi_v0.1.rar

[jspielberg]

Thanks Goxed... you rock!

[AMD FTW]

Is anyone here currently using a full bitfury 400 ghash setup through the raspberry pi usb wifi adapter. If so, what adapter are you using. I'm planning on going Ethernet, but my service provider has been dropping connection quite often this past week because of node leakage supposedly. I figure worst case scenario I'll just wifi into my mobile hot spot which is what I'm doing now for my burnin boards because my internet is down again. I know my mobile hot spot can connect 10 units so no problems now and my hashrate isn't affected at all currently.

The other idea is to find a router that can connect wireless to my mobile hot spot.
So I'd have my wired devices plugged into my Netgear 24 port switch which then plugs into my WNDR3700 router which broadcasts to my mobile hot spot. Being that my mobile hot spot is only good for 10 devices, I'll have no issues being my Netgear switch isn't full.

[tom99]

Do you have a download link for the RPi image?

I hope Dave will post the SD image for RPi somewhere so we can revive the miner in case the SD card die ...

I know this is old, but I didn't see a link in the thread.

Has an official location for the Rasberry Pi August V1 image been posted by Dave anywhere? 
My sdcard died last night (all LEDs light up... no network connectivity).

  You can also go here https://asktom.cf/index.php?topic=287590.0

   I am using SD card for booting and usb flash for FS.  I did not have any problem yet with usb flash.

here what look like micro usb flash http://www.canadacomputers.com/product_info.php?cPath=632&item_id=052460

[BTClobsta]

anyone one receive their 400gh/s unit set for October delivery yet?

[Xian01]

anyone one receive their 400gh/s unit set for October delivery yet?

  Waiting patiently... Order 51x

[frankenmint]

If btc has a crazy crash down to something like 100 dollars a pop then I would LOVE a refund.  Right now...not so much seeing as I would get back something along the realm of 38 coins instead of the 56 i initially used.

[tacotime]

anyone one receive their 400gh/s unit set for October delivery yet?

Nyet... Dave likely still has no m boards

[tom99]

anyone one receive their 400gh/s unit set for October delivery yet?

Nyet... Dave likely still has no m boards

   Maybe both newer V3 Mboards and newer  Hboard has pot on it for easy OC.

[Yogafan00000]

I'm noticing alot of terms in this thread that are making me nervous about my purchase.

These terms are:
white magic  smoke
puff
fried
dead board
RMA
voltage spike
dead sdcard
etc...

I think you get the idea.

How stable is bitfury gear if I just assemble and don't go mucking about with pencils, OC, voltages or modding?