To build your own function generator, you will need a few essential components and tools. The project is designed to be accessible even for those who are relatively new to electronics and Arduino.

The only thing that’s cheaper is the arduino you already own. I can flip bits on a port with around a 4uS period, if I recall correctly (can’t find the darn sketch I wrote for that at the moment).

[Joekutz] wanted to re-build an audio-rate function generator project that he found over on Instructables. By itself, the project is very simple: it’s an 8-bit resistor-ladder DAC, a nice enc… ...