The characteristics of the active buzzer is:

1 active buzzer inside with shock source, so as long as the electricity will call

2 program control convenient, single chip microcomputer a high and low level can make the sound, and the passive buzzer is can't do.

Each weight is about 6 g

A module description

1 module driven by 9012 triode

2 working voltage of 3.3 V to 5 V

6 sets of fixed bolt hole, convenient installation

7 small board PCB size: 3.3 cm * 1.3 cm

2 module interface specification (3 wire system)

1 VCC external 3.3 V to 5 V voltage (which can be directly connected to 5 V microcontroller and 3.3 V microcontroller)

2 GND external GND

3 I/O external microcontroller IO port