Not sure what cnc is but I made the pcb schematics and layout using eagle. I did omit the optocoupler from my digital board since I don't think I'll be needing it. My analogue boards were originally of single board design but I have some scrap pcb's lying around so I redesigned it to be two boards (I hate to waste good pcb's
).
Here are PDF files of my PCBs:
megadrum(copper).pdf
megadrum(top).pdf
This is a modified layout of the original one I made. I had to make a correction to a critical design error and added two resistors for LCDs with backlight (mine doesn't have one).
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