This is an all-digital-hardware Theremin. The Digital IR Theremin uses comparators, digital logic and a single 555 timer for tone generation to make it so that when you wave your hand in front of the infrared proximity sensor, it outputs a tone with varying pitch depending on how far away your hand is from the sensor! Digital IR Theremin – [ Link ] Mini IR Theremin Long Range (10m) IR Beam Break Detector Human Theremin Halloween Costume Squaremin – Theremin Style Instrument The 555 SliderSynth
Read the rest here:
Digital IR Theremin