Passive Buzzer Unit
Description:
Driven by C9012 PNP transistor, this passive buzzer unit is well designed and made. Easy to use and install.
Features:
* Power supply: DC3.3 - 5V
* Screw hole: 3mm
* PCB measurement: 33 * 13 * 1.6mm
* VCC-> external power GND -> GND I/O -> MCU
