this is my hacked front light for my bike. it's a tiny45 avr microcontroller that i programmed to play the complete 14min drum part in ravel's bolero. the reason i picked bolero was that it's a fairly well known rhythm and that it's very repetitive (= don't require much memory).
firmware attached.

bikelightBolero from redFrik on Vimeo.

Package icon bikelightBolero.zip4.36 KB