I’m going to be introducing a unit on electricity with an afterschool program, and wanted to start by making those steady-hand games where you try not to touch the wire:
I want to incorporate a piezoelectric buzzer, the kind that can be driven just by attaching a battery.
Of course I left this too late for internet shopping. Where can such things be bought these days, now that Radio Shack no longer has bins of hobbyist electronics parts?
I’m thinking maybe dollar stores have very cheap doorbells or something. Any other thoughts?
(Alternatively I could make something, but while I remember making a buzzer with a saw blade and an electromagnet in my youth, I’d be looking for something much simpler…)