“Analog synthesizers are very cool, but also quite difficult to make.
So I wanted to make one as simple as it can get, so its functioning can be easily understandable.
For it to work, you need a few basic sub-circuits: A simple oscillator with resistor selectable oscillating frequency, some keys, and a basic amplifier circuit.
If you use some conductive pads instead of push buttons for the keys, you could make your version of the very cool
Stylophone!
In this instructable we will learn how to make it and we will learn how it works.
The instructable is meant for beginner to intermediate electronics enthusiasts.”