Re: Open Source Bitcoin ASIC miner project that uses 2x BM1387 (Antminer S9)
...
For now I have just been using a cheapo adjustable power supply from Amazon. You're right, an onboard buck converter is the way to go. Unfortunately they're a little hard to come by these days with the chip shortage. I did a test with the MAX20499 (https://github.com/skot/MAX20499_breakout) but then I realized Maxim won't give the full datasheet to plebs. Still looking for a better part. the TPS51219 on the Newpac is completely out of stock.
I want to experiment with offloading everything that cgminer does (fetching work via stratum and rolling the extranonce) to an onboard microcontroller in a pod miner setup. I've started with an ESP32 so I can connect over WiFi too. (https://github.com/skot/bitaxe/tree/pro). Pair that all with a power supply suitable for solar and you could just litter your roof with these things
Is there a "standard" CPU heatsink with fan? I looked around at these but couldn't really come up with anything. It seems like the economies of scale with the whole PC water-cooling scene could be useful here.
Ja as I pointed out in the thread in Technical Development thread using on-board Vcore regulator is a must. At the low voltage and high currents involved only a properly bypassed bolted cable connection would work. Any other kind of connector will simply have too much voltage drop unless it's huge and - be way too expensive.For now I have just been using a cheapo adjustable power supply from Amazon. You're right, an onboard buck converter is the way to go. Unfortunately they're a little hard to come by these days with the chip shortage. I did a test with the MAX20499 (https://github.com/skot/MAX20499_breakout) but then I realized Maxim won't give the full datasheet to plebs. Still looking for a better part. the TPS51219 on the Newpac is completely out of stock.
I want to experiment with offloading everything that cgminer does (fetching work via stratum and rolling the extranonce) to an onboard microcontroller in a pod miner setup. I've started with an ESP32 so I can connect over WiFi too. (https://github.com/skot/bitaxe/tree/pro). Pair that all with a power supply suitable for solar and you could just litter your roof with these things
Is there a "standard" CPU heatsink with fan? I looked around at these but couldn't really come up with anything. It seems like the economies of scale with the whole PC water-cooling scene could be useful here.
TI has several good links regarding proper Vcore regulator design that I posted in that above link along with Those TI links also giving parts sourcing and availability links.