Create many different electronic devices by combining blocks containing resistors, capacitors, coils, transformers, diodes, pilot lamps, and more.
Make a complete circuit simply by lining blocks up on the main unit.

Lie detector circuit

The human body has several hundreds kilo-ohms of resistance. That changes when we sweat or grip the tester rod tightly. The lie detector is an experiment that uses these changes in resistance.

Diode detector radio circuit

Crystal radios were the original do-it-yourself radio. They let you listen to radio on a very simple circuit. They don't use batteries, so they don't have amplifier circuits. You will hear sound using only the power of radio waves broadcast by the station.

150 circuits you can build