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This project is a demonstration of a cool electronic music instrument – ‘Theremin’. A Theremin player fascinates the audience and drives their attention because he/she does not have to touch an instrument at all! For those who got into this page obviously do not think it’s a magic, unlike others. We will rather find out what makes a Theremin to play notes with our hand movements and we will build a basic one.
A Theremin has three basic components – an ultrasonic sensor, a microcontroller, and a speaker. A distance of an object is detected by an ultrasonic sensor and that value is sent to a speaker to output different frequencies as notes.
With this basic understanding, I built a basic Theremin as below: