[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 ...

The man in this semi-fictional vignette was Lev Sergeyevich Termen, better known in the western world as Léon Theremin. You know Theremin for the musical instrument which bears his name.

Theremins are played by moving your hands near (but not touching) two antenna. One antenna controls pitch, the other controls volume. Theremins work by creating two AC currents using two capacitors ...

Exploring the origins of the Roland 808 drum machine, which completely revolutionised the world of electronic and dance music after its release in the 1980s.