[Keystone Science] recently posted a video about building a theremin — you know, the instrument that makes those strange whistles when you move your hands around it. The circuit is pretty simple ...

There’s no instrument spookier than a Theremin, which also happens to be one of the world’s first electronic instruments. Leon Theremin plays his namesake instrument. Image via Linda Hall ...

The theremin is an unusual instrument. You can play it without touching it. Two antennae generate an electromagnetic field and sense the position of the player's hands. One antenna is vertical and ...