This is a simple light chasing circuit, using a 555 timer to clock a 7490 decade counter, then using a 74138 demux to light the LED strands in order. More details here:
http://www.cibomahto.com/?p=137
(The song is Kraepelin, by pabloperez, found at freemusic.freeculture.org)
that's cool what's the board callewd that u got everything pluged into?
MrTerru 3 years ago
It's a Heathkit Laboratory Breadboard ET-3300. I think it's pretty old though- my Uncle put it together when he was studying electronics, then passed it on to me :-).
Mahto 3 years ago