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Build the Squaremin - An Optical Theremin

The Squaremin

Here's a fun twist on the theremin that looks to be fairly easy to build too. has posted an article on how to make a "Squaremin" - a theremin-like instrument that uses IR sensors instead of metal antennas to control sound. An additional departure from the theremin, one of the Squaremin's two IR sensors controls pitch, while the other controls which octave is being played. On top of the Squaremin, different colored lights indicate which note and octave are currently being played.

The Squaremin is powered by batteries, making it a portable instrument. As IR instruments can sometimes be sensitive to ambient lighting, I'm curious to hear about how it performs in various settings.

If you build one, please share some pictures and sound files with us! Enjoy!

Read: Building Squaremin as a form of theremin (

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