[Work in progess] Burnins Avalon Chip to mining board service

[vanycon]

Aaand we have a brand new pornostar: bitburner XX :'D

[Bicknellski]

AMAZEBALLS!!!!!!!!!!!!!!

[culexevilman]

Awesome man, keep it up...!

[dudeofthestick]

Onto what we'd like to see in the thread..

We've seen naked board pron, but what about a little beauty all blinged up with components and cheeky little ASICs  

Be careful what you wish for, it might become true.





Solder paste Jet Printer - no stencils needed


Pick and Place my Jobs was run on


Pick and Place assembly of my board


Soldering in vapor phase.


Big black mean machine, does 20.000 components per hour.


I am literally DEAD now, I need sleep.
But the first tests show all power supplies working as expected, no magic smoke escaping, and thats what electronics is all about.

Lovely! What a great job burnin!

[SebastianJu]

Great update burnin!

The holes are copper plated and conduct heat to the backside of the board where the heatsink will be placed.
I am just wondering if it would be better to have no solder mask directly under the ASIC chips heatsink side of board.

But i dont see any copper at the heatsink side of the pcb. How should the heat be transported to the heatsink? Is the thermal compound thought to fill in the holes, and find the way to the copper and find contact to the heatsink this way? I thought it would be better to have as much metal as possible transport the way from the chip to the heatsink and having a good contact with the heatsink.
Im not a tech guy so i wonder...

I am fairly sure that most of the back side is copper ground but it is covered with solder mask.
If you were to scratch the back with something sharp you would see the copper.

Ok. So after all the chips are soldered you have to take away the solder mask so that the heatsink can get in contact with the copper?

[Schrankwand]

Btw Burnin: Great photo Op. Most people fuck up product placement pics, these are great.

[WynX]

Mean pick&place machine indeed: http://youtu.be/S8qkaTsr2_o?t=8s
So production is gonna be done on the Cobra? Impressive 01005 size...

[Foofighter]

Mean pick&place machine indeed: http://youtu.be/S8qkaTsr2_o?t=8s
So production is gonna be done on the Cobra? Impressive 01005 size...

impressive working speed!

[bezzeb]

Ok. So after all the chips are soldered you have to take away the solder mask so that the heatsink can get in contact with the copper?

Judging from the earlier photo of the backside (new meaning to sexy backsides!) and what I know of thermal vias + surface mount components:



I'd say he's made sure that all through hole components are away from the Avalon chips and signal traces are on internal layers which means the entire bottom plane can just be sandwiched against a heat sink with perhaps some thermal tape or paste using the 6 provisioned fixing holes.

Clever, simple and reliable, and there's so much surface area that i don't think the solder mask will interfere enough to matter.  Regardless, I cant wait until he takes my money so i can get me some....

For those interested in learning more about this (now fairly standard) technique, some links for edjamucation:
http://www.electronicproducts.com/Thermal_Management/Heat_Sinks_and_Thermal_Materials/PCB-cooling_techniques_and_strategies_for_IC_packages.aspx
http://www.electronics-cooling.com/2004/08/thermal-vias-a-packaging-engineers-best-friend/

And Burnin, your photos plus the wicked video of that cobra P&P are sooo much better than porn...  
Great stuff....

[sprint347]

burnin the XX model is looking great, is the X version coming along?

[Schrankwand]

burnin the XX model is looking great, is the X version coming along?

My personal guess is that he will use the same PCBs but only put 10 chips. Controller will then try to run both lines, fail and only run one stack of chips. That would cut development costs and he would get cheaper PCBs.

[FullFathom5]

Hopefully the power requirements for 450MHz clocking is being considered for both forms of the board? 

burnin the XX model is looking great, is the X version coming along?

My personal guess is that he will use the same PCBs but only put 10 chips. Controller will then try to run both lines, fail and only run one stack of chips. That would cut development costs and he would get cheaper PCBs.

[dan99]

Hopefully the power requirements for 450MHz clocking is being considered for both forms of the board? 

burnin the XX model is looking great, is the X version coming along?

My personal guess is that he will use the same PCBs but only put 10 chips. Controller will then try to run both lines, fail and only run one stack of chips. That would cut development costs and he would get cheaper PCBs.

Ya we need 450MH/S per Chip O/C

[Toolhead]

ANN: BitBurner water cooling solution coming soon!  

Made by german cooling experts:

http://www.anfi-tec.de

[dani]

ANN: BitBurner water cooling solution coming soon!  

Made by german cooling experts:

http://www.anfi-tec.de

They look pretty expensive to me. Any price range?

[burnin]

Just a quick status update:

Bringing a prototype like that takes its time, thank you all for your patience.
I verified most of the functions now, and there were some changes that will find their way into the next revision
Hit some problems with the quarz clocking the micro, it would not always start to resonate, so I changed it to an Oscillator.

Power supplies - all working as expected
ASIC Upstream - working, stable
ASIC downstream - unstable, investigating
USB Connection - working
core voltage adjustment - working
CAN-BUS - in development
Temperature/Voltage sensing - in development

I had it hashing for a bit but the return interface for the nonce  is not working stable at the moment. (about 10% HW errors)
I know whats causing the issues, have to change a part to get rid of them. (in the mail for Tuesday)
Power consumption at 5.1Ghash - ~36Watts





No that's not the Production heatsink:

[Min€r]

  Thats just awesome - thanks Burnin for the update!

[Dunkelheit667]

Finally, we can go to bed (speechless) again. Thank you burnin!

[Sukki]

Finally, we can go to bed (speechless) again. Thank you burnin!

Me too, really awesome job 
Can´t wait for them 

[Sophokles]

Great !