I took apart my project, so that I could just have the UNO testing the Piezos that I had so much difficulty soldering. They don’t work. I’m not even sure why, the little one that I’d used in a project last year, don’t seem to work at all.
Kind of frustrating, but I’ll just keep trying to figure it out.
I did figure out how to power the Arduino from my power supply. 12V.