Double Side Piezo Element

Double Side Piezo Element

The piezoelectric ceramic buzzer is mainly composed of a multivibrator, a piezoelectric buzzer, an impedance matcher, a resonance box, and a shell. Some piezoelectric ceramic buzzers are also equipped with light-emitting diodes.

The multivibrator is composed of transistors or integrated circuits. When the power is turned on (1.5~15V DC working voltage), the multivibrator starts to vibrate and outputs 1.5~2.5kHZ audio signals, and the impedance matcher drives the piezoelectric buzzer to sound.

The piezoelectric buzzer is made of lead zirconate titanate or lead magnesium niobate piezoelectric ceramic material. Silver electrodes are plated on both sides of the ceramic sheet, and after polarization and aging treatment, they are then glued together with the brass sheet or the stainless steel sheet.

The buzzer itself needs to be loud enough, and there are some structural skills: use the principle of resonance to evenly put some bones on the side wall of the sound cavity; choose a suitable cavity volume; change the sound hole straight out to With a cap, it becomes a ring-shaped sound outlet. There is a buzzer sound cavity of a treadmill on the market that does this. A buzzer with a diameter of 20 is loud enough.