Uncategorized

TINY OPTICAL THEREMINS

Matrixsynth explained a couple exceptionally small optical theremins that look like they’d produce a terrific afternoon project. [AlexArt] first developed the easy circuit on a piece of protoboard (Google translated). understanding he could go smaller, he then developed it freeform with a buzzer instead of a full size speaker. The design is based around the common 555 chip and photoresistor. Here’s a easy circuit you can use to set out your own. The optical theremin ought to not be confused with the conventional RF theremin because the name comes from the similar sound, not similar construction.