Simple relay circuit Two 555 timers to make a traffic light One 555 timer to blink an LED Two 555 timers to blink 3 LEDs LEDs lighting back and forth Speaker with volume control Buttons to control lights and speaker Obnoxious "piano" Pitch and warble control...
very obnoxious Controlling frequency shapes LED screen showing information.
(black area is from
camera timing) Binary programmed
LED screen.
Entered data using binary code