Strictly speaking, a Theremin uses a pair of antennae that act as capacitors in a specific R/C circuit. Looking at ...

Unlike a real theremin, you can trigger this one with anything the ultrasonic sensor can see. The Arduino audio quality is not superb, of course, but it is still a fun rainy day project.

Think "theramin" and what comes to mind? The Doctor Who music? Or the original Star Trek theme? Or perhaps even Good Vibrations by the Beach Boys? Well, actually none of them uses a theremin, contrary ...

With some circuits, capacitors, a speaker, and a 9-volt battery, you can build a pocket-sized theremin to create spooky sci-fi sounds.

We've already seen how to construct a trebuchet and how to make an Arduino Theremin, and now our own James Floyd Kelly had added a great little project that it sure to delight any younglings in ...