Building Squaremin as a form of Theremin

The device is a later version of Theremin which can also be used by musicians as an electronic musical instrument while being powered by batteries.

The Squaremin is a small instrument that has two infrared (IR) sensors as compared with Theremin which has two antennae that detects proximity. One sensor will control the note while the other sensor controls the octave which is being played via the front speaker. For the Theremin, one antenna controls the pitch while the other controls the volume.

Similar to Theremin, it operates based on the principle of heterodyning two radio frequency oscillators and generates sound depending on the proximity of the musician’s hands. It is usually played by moving the hands to and from in mid-air for high tremolo effects. It is controlled without any contact with the musician. The electric signal will be amplified and be sent to the loudspeaker.

One of the seven colors is illuminating the center area to reflect the tone and located on the top panel is a small indicator. There are seven octaves that the instrument can play for each note C-B where C ranges from 65Hz to 4160Hz.

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