Multi Tone Buzzer

It is an audio signaling device with multiple tone.

It may be mechanical and electromechanical or

piezoelectric.

Mechanical Buzzer

These are the lower frequency buzzer.

They require driver.

They quite as compared to Piezoelectric buzzer

Electromechanical Buzzer Electric bell is an example of electromechanical buzzer.

It contains magnet.

Piezoelectric Buzzer

It may be driven by oscillating electronic circuit and audio

amplifier.

This buzzer is louder as compare to mechanical buzzer and

sure to get attention of everyone.

Circuit Diagram

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