Build An Analog Function Generator
I build this simple XR2206 Sine, Triangle, and Square wave analog function generator.
At the end of the video, I connect up a speaker. This really isn't designed to drive a speaker. It wasn't very loud
I bought this on eBay From Alice1101983
https://goo.gl/pjLI4k
Julian Ilett's channel, lots of eBay goodies and building
/ julius256