Assembled third version of PCB:
- Added current monitor (in theory, should help to autodetect retract size).
- Fixed BOOT pin control, to allow firmware upload via USB.
- Added holes for wire pins to lock plastic supports.
- Debug pins grouped in line.
My friend, second author of our sensor-less speed control for grinder decided to join this project too. He will help with drivers debug (current firmware runs in simulator only). And i will continue with reflow micro table for this time.
Sorry for slow updates - that's specific of OSS development. Instead of doing single project, i prefer to do multiple things in parallel. This allows to share efforts, and each can pick preferable parts where he is most qualified.