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Two Transistor Metronome Circuit

Created on: 10 May 2013

An easy to build two transistor metronome circuit that gives a periodic tick sound. The frequency of the tick can be adjusted using a potentiometer. An easy to build circuit for beginners in electronics.

A metronome is typically used by musicians when practising in order to play in time to a particular beat.

This video shows the metronome operating and the tick speed being adjusted using the potentiometer.

Can't see the video? View on YouTube →

Two Transistor Metronome Circuit Diagram

The two transistor metronome circuit shown here can be powered by a 9V battery.

Two Transistor Metronome Circuit Diagram
Two Transistor Metronome Circuit Diagram

The frequency of the tick is changed using potentiometer RV1. The lower the resistance set on the potentiometer, the faster the metronome will tick.

Resistor R1 is used to set the maximum speed that the metronome will tick at. Change the R1 and VR1 values to change the speed or frequency range that the metronome operates over.

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Loudspeaker and Battery Clip

The speaker and battery clip have single core wire soldered to them to make them easy to plug into the breadboard.

See the related articles on how to solder wires to these two devices: