The circuit was constructed using a few components to produce a unique buzzer with adjustable buzzer tones. Buzzer – an electronic signaling device that produces light and buzzing sound when activated ...

The flashing is thanks to LEDs with a built-in, integrated flashing circuit and the nasty noise comes from a piezoelectric buzzer — both are available from electronics stores that sell ordinary LEDs.

Watch this video to learn more about what an electrical circuit is and how it works. Electrical energy flows around circuits which are loops made of metal wires. In this game, touching the wire with ...