Piezo Buzzer
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Piezoelectric buzzer
The piezoelectric buzzer mainly consists of a multi vibrator, piezoelectric buzzer, impedance matching device, resonant box, shell, etc. Some piezoelectric buzzers are also equipped with light-emitting diodes on their shells.
A multivibrator is composed of transistors or integrated circuits. When the power is turned on (with a DC working voltage of 1.5-15V), the multi harmonic oscillator vibrates and outputs an audio signal of 100-500HZ. The impedance matching device pushes the piezoelectric buzzer to produce sound.
Piezoelectric buzzer
It is made of Lead zirconate titanate or lead magnesium niobate piezoelectric ceramic materials. Plating silver electrodes on both sides of the ceramic sheet, polarizing and aging treatment, and then sticking it together with brass or stainless steel sheets.
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Buzzer
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