Piezoelectric buzzer is a vibrator, piezoelectric buzzer, shell and other components of the piezoelectric ceramic oscillator components and components of the electro-acoustic components, the piezoelectric ceramic after the high pressure on the vibration of the metal sheet, After adding AC voltage, because of the piezoelectric effect, deformation deformation and expansion and contraction, is the use of vibration of the metal sheet and make a sound.

The outer diameter of the buzzer film and then the resonator edge of the fixed chip, the general piezoelectric buzzer is no feedback type buzzer, so that there will be a higher sound pressure output, resulting in the external oscillator circuit Push the signal to make the buzzer sound.

The buzzer and ceramic pieces fixed in the ring structure, and with the correct frequency feedback and positive feedback circuit, you can generate the sound pressure and the correct frequency.

Piezoelectric buzzer is characterized by: small size, light weight, thin thickness, low power consumption, low cost.