Turning the Theremin Vision II into a real Theremin

by Stephen Hobley on August 26, 2009

When I first got into making Theremins I ordered the Theremin Vision kit. I had a hard time getting it to work at first, but finally got it running OK.

At the moment I only seem to get about 12″ of usuable range.

My reference oscillator runs at about 1.67MHz and the sensor oscillator is running at 1,54MHz.

A 4013 flip-flop does the necessary combining and filtering. A 14 bit ripple counter then gives a range of frequency responses.

Hooking up a piezo buzzer to any one of the “bit” output lines creates an audio tone – just like the original Theremin.


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