Hi, I recently purchased a Stoicheia DIY kit from Synthcube – it’s a black panel kit w/Bananuts & Knurlies, so I assume it’s one of the recent run of kits packaged by Befaco.
The PCB in the kit is labeled Rev08, which matches the PCB image on the last page of the printed build guide that was included. However, the header of the build guide says “Stoicheia Rev09 - ASSEMBLY GUIDE - July 2021” – this apparently is an important distinction.
All of the hardware collateral – BOM & schematic – on your Github is from fairly old revisions (the BOM on your Github is labeled Rev04, and the schematic, while unlabeled, includes PTCs and no 78L05, so it seems like it’s from a version before the recent updates). This is making troubleshooting difficult!
Specifically, one problem I currently have is that LEDA and LEDB are not lighting up. The board I have, Rev08, has the following LED : resistor pairing:
LEDA : R10 LEDB : R9 LEDC : R12
This appears to be unchanged from the old board revision on the website.
However, the BOM in the build guide says the following when it comes to resistor values:
RESISTORS Qty Value Name on PCB 9 1k R2, R3, R4, R6, R8, R12, R14, R17, R18 3 10k R1, R5, R7 2 100k R10, R16 2 100 R11, R13 2 1M R9, R15
Since I didn’t dig into this until after the module wasn’t working, this means that at the moment, one of my LED resistors is a 100k and one is a 1M. Needless to say, neither one lights up
I could probably sit here with the old schematic & the old BOM and trace out the whole PCB I have, to deduce what are the rest of the correct resistor values, but I figured it would be easier to ask if the Rev08 BOM is posted anywhere. You also might want to alert the folks at Befaco & at the various vendors who are reselling their kits that there seems to be a board/assembly guide mismatch.