Dinosaur Multiplexer, 1975: shift-register-controlled analog switches, my first attempt at a serious circuit when I was an undergraduate at Wesleyan. Settings were programmed using the breadboard strips and wire; hole in top was for cooling the TTL chips; battery holder on back for providing negative voltage I didn't realize was needed until I built the whole thing. It sounded as ugly as it looked, but saw action routing Lucier's brainwaves to different speakers in the tenth anniversary performance of Music For Solo Performer at the Paula Cooper gallery in NYC, 1975.