Build a Theremin.

I’ve built a few theremins. I tried building several models from books & magazines, but in the end finding all the parts was just too difficult. The RS theremin looks like a great beginner project though, and if I was going to try a scratch-build design again, I’d definitely start there. I’ve build the PAiA Theremax kit and the Moog Etherwave kit, and both were quite straightforward.