Here is version 2.0, based on Forrest Mims "sound synth" circuit AKA Atari Punk Console, but triggered by a 555 for that tasty rhythmic sound.
I added two LED arms and a photoresistor controlling pitch, a crude "keyboard", and a few switches to change capacitor values (jump octave/ timbre) or route the 555 signal back into the 556 chip for a variety of lively tonal effects reminiscent of a harp or a piano.
Designed by Noam Schatz AKA 3rdness
http://www.mobiusband.com/blog
http://www.myspace.com/3rdness
fucking awesome!
mitb19 2 years ago