MAKE contributor Michael Una cooks up some particularly head-bobbing beats with help from an old arcade sound effects chip (plus a 4017 sequencer). The SN76477 “complex sound generator” IC is best known its work in Space Invaders arcade cabinets – the chips’ onboard LFO, VCO, and noise generator combine to produce all manner of blippy goodness. The bad news is it’s no longer produced :( Though some surplus and rare-chip sellers have them from time to time.) So if you do score one, a drum machine project sure seems like a worthy home!
25 year old box of sounds