Electronic Metronome Emulates Mechanical Sound

It would be cool and elegant to a have mechanical sound character for our electronic metronome. This electronic metronome circuit will produce such sound, making your life more fun. Here is schematic diagram of the circuit:

electronic-metronome-sinthesize-mechanical-sound

The metronome circuit consists of two 555 oscillators. The first oscillator is used to make high frequency tone, and the second one is used to produce the beat timing.