Rainbowduino - problems with programming

I feel a little thick - but where would I find that?

Best regards,
Jens

PS: Your signature is spot on. Thinking back to 6502 systems talking assembler only, with horrible interfacing - one of the reasons most people didn’t want to handle microcontrollers at that time. Arduino is a brilliant concept - haven’t had as much fun coding in ages :slight_smile:

EDIT: Found your Wiki, browsing…