Active Buzzer Module

An active buzzer mounted on a small breakout board with the driving transistor already fitted, so an Arduino pin can switch it directly without risk of exceeding the pin's current limit. Sounds a fixed tone whenever the pin goes HIGH. The three-pin header makes it a plug-in part for sensor shields and prototype boards, and the driver transistor is exactly what a bare buzzer soldered straight to a pin lacks. Onboard driver transistor protects the Arduino pin; Sounds with a single digitalWrite; Standard 3-pin header for sensor shields; Fixed loud tone, ideal for alerts