Rainbow-electronics GE863-PY Manual do Utilizador descarregar pdf (Página 58)

GE863 Hardware User Guide

1vv0300783 Rev.0 - 10/06/08

8.8 Magnetic Buzzer Concepts

8.8.1 Short Description

A magnetic Buzzer is a sound-generating device with a coil located in the magnetic circuit consisting

of a permanent magnet, an iron core, a high permeable metal disk, and a vibrating diaphragm.

Drawing of the Magnetic Buzzer.

The disk and diaphragm are attracted to the core by the magnetic field. When an oscillating signal is

moved through the coil, it produces a fluctuating magnetic field, which vibrates the diaphragm at a

frequency of the drive signal. Thus the sound is produced relative to the frequency applied.

Diaphragm movement.

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Rainbow-electronics GE863-PY Manual do Utilizador Página 58