chapter  46
2 Pages

Topic 46. Audible Output

A piezo-electric buzzer produces a low-pitched sound suitable for a door alert.

The buzzer shown above operates on 6 V and requires 20 mA. Its power leads are coloured red and black. Connect red to positive and black to negative. There are two fixing lugs. Bolt the buzzer firmly to the case or circuit board to obtain maximum sound.