[Mark] had seen a few examples of algorithmic music generation that takes some simple code and produces complex ... He’s feeding the PWM from an Arduino into the voltage controlled oscillator ...

This last seems like a great fit since you can do lots of interesting things with simple ... Arduino library, so if you want to get into the protocol you’ll have to work through that code.

Check out this Arduino-based electronic component tester. The device is intended to give a simple way to test transistors, resistors, capacitors, diodes and MOSFETs, and such like. The Arduino tester ...