Hello My name is Peyton and after coming across your project on github it inspired me to work on my own product which I didnt realize until today that it was discussed on the forum page about the bitaxe 1387 version. but anyway my project is a 12 asic BM1397 hashboard that is the same formfactor as a matx motherboard so you can put it in a slim matx case. my plan is to power it with an apw 3. I will link some 3d renders of it. But the plan is to cool it with standard LGA1151 heatsinks and its 4 asics per heatsinks and 3 heatsinks. My idea which im not sure if it will work is to basically have 6 domains where there are 6 sets of two chips in series. the power will come from 12 volt of the apw3 and get stepped down to 5v then 3.3v which then powers the 2 asic domain splitting the power into 2 coming to that 1.6 vdd line it needs. It also will be controlled by a rpi cm4. That will run the linux which runs kano theoretically. What I think I need your help on is the actual communication portion. my plan is to make a built in ttl connector which is hardwired into the cm4 as a usb port with a dip switch to power it off if necessary. I think I can figure out how to wire that ttl connector up no problem, what I dont know how to do is connect the asics to said "ttl adapter" or how to actually make the chips do any work. any guidance you can give me of how to connect and communicate with the asics would be much appreciated and lmk what you think!

https://gyazo.com/24625a4510e0393d42d2ae27f94f5ebc - overall
https://gyazo.com/438c1e7d3284387ee43fe1a1162a8a45 - overall back
https://gyazo.com/ae867ddc0d43c6b0dc4fe1b36e88fbf1 - asic layout, 8 pin ic 5v 5 pin 3.3v, not fully put together but should work in theory?
https://gyazo.com/91955ccfa9e6b9f295086913b4efdbb6 - serial ttl adapter, 12v power, cm4, gpio pin set, startings of power circuitry to power the cm4

I am designing it through easy eda as thats the software I like best and could send you the files if youd like. again any help would be appreciated!