1, according to the principle of its driving method, can be divided into: active buzzer (including drive line, also called self-excited buzzer) and passive buzzer (external drive, also called his exciting bee Sounder)
2, according to different construction methods, can be divided into: electromagnetic buzzer and piezoelectric buzzer;
3, according to the different packaging, can be divided into: DIP BUZZER (pin buzzer) and SMD BUZZER (patch buzzer);
4, according to the difference of current, can be divided into: DC buzzer and AC buzzer, among them, the most common piezoelectric buzzer with DC, using piezoelectric material, that is, when external force causes piezoelectric material to occur The piezoelectric material generates a charge when deformed. Also, the piezoelectric material deforms when energized.