Piezo Buzzer 42x16mm 105dB 12V With Wires
Introduction of Piezo buzzer
1. The function of the buzzer The buzzer is a kind of electronic buzzer with integrated structure. It is powered by DC voltage and is widely used in computers, printers, and computers.
Used as sounding devices in electronic products such as printers, alarms, electronic toys, automotive electronic equipment, telephones, timers, etc.
2. Classification of buzzers Buzzers are mainly divided into two types: piezoelectric buzzer and electromagnetic buzzer.
3. The circuit graphic symbol of the buzzer. The buzzer is represented by the letter “H” or “HA” in the circuit (the old standard uses “FM”, “LB”, “JD”, etc.).
The structure principle of the buzzer
Piezoelectric buzzer Piezoelectric buzzer is mainly composed of multivibrator, piezoelectric buzzer, impedance horse
It is composed of orchestrator, resonance box, shell, etc. Some piezoelectric buzzers are also equipped with light-emitting diodes
Supporting electronic components tube.
The multivibrator is composed of transistors or integrated circuits.
When the power is turned on (1.5~15V DC
Operating voltage), the multivibrator starts to vibrate, and the audio signal of 1.5~2.5kHZ is output, and the impedance matcher promotes
The piezoelectric buzzer makes a 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, after polarization and aging treatment, then
Stick to brass or stainless steel.
Electromagnetic buzzer The electromagnetic buzzer is composed of an oscillator, a magnet wire circle, a magnet, a vibrating diaphragm and a shell.
After the power is turned on, the audio signal current generated by the oscillator passes through the magnet wire circle, so that the magnet wire circle generates a magnetic field. The vibrating diaphragm is in the magnet wire circle and the magnet
Under the interaction, it vibrates and sounds periodically.
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