Microbuzzer.com · Posted on 08-08-2010 by microbuzzer

Piezo buzzer mainly by multi-harmonic oscillator, piezoelectric buzzer, impedance matching device and the resonance box, shell and other components. Some piezoelectric buzzer case also equipped with light emitting diodes.

Multivibrator constituted by the transistors or integrated circuits. When switched on after the DC voltage from the multivibrator oscillator output audio signal, impedance matching device to promote the piezoelectric buzzer sound. Piezoelectric buzzer by the PZT or PMN piezoelectric ceramic materials. In the ceramic coating on both sides of the silver electrode by polarization and aging treatment, and then with the brass plates or stainless steel pieces stick together.

Magnetic buzzer by the oscillator, the electromagnetic coil, magnet, vibration diaphragm and shell and other components. When powered on, the audio oscillator signal current through the electromagnetic coil, electromagnetic coil creates a magnetic field. Vibrating diaphragm in the electromagnetic coil and magnet interaction, periodically vibrating voice.

Tags: , ,
Posted in TECHNOLOGY | Comments (0)