Buzzer

Classification:

1. It may be classified into active buzzer (contains driving circuit, also known as self-excited) and passive buzzer (external drive, also known as externally excited) based on the concept of its driving mode.

2. It can be classified as an electromagnetic buzzer or a piezoelectric buzzer, depending on the building method.

3. It can be classified as DIP Beeper (pin) or SMD Beeper (chip) depending on the packaging.

4. It can be separated into DC and AC based on the differing currents. Direct current, which uses piezoelectric materials when an external force causes piezoelectric materials to occur, is the most frequent piezoelectric beeper. When distorted, piezoelectric materials generate electric charges. When energized, the piezoelectric material deforms similarly.

The electromagnetic buzzer primarily employs the properties of an electrified conductor to generate a magnetic field, as well as a fixed permanent magnet and an energized conductor to generate magnetic force in order to press the tympanic membrane fixed on the coil.
The piezoelectric structure is simple and sturdy but has a single tone, which is suited for alarms and other equipment, due to the differing sounding principles of the two buzzers. Because of its high sound quality, the electromagnetic type is commonly used for speech, music, and other equipment.

5. A buzzer that is both active and passive.