Buzzers are widely used in computer industry (motherboard buzzer, chassis buzzer, computer buzzer), printer (control panel buzzer), copier, alarm industry (alarm buzzer, alarm buzzer), electronic toy (music buzzer), agriculture, automotive electronic equipment industry (car buzzer, reversing buzzer, car buzzer, motorcycle buzzer), telephone (environmental buzzer), timer, air conditioner, medical device, etc.
There are two ways for single chip microcomputer to drive the other buzzer: one is to drive directly through PWM output port, and the other is to use I/O timing to flip the level to generate driving waveform to drive the buzzer.