Description Modul buzzer active 3.3 – 5 VDC the characteristics of an active buzzer that can be reused with an LED control port are: 1 The active buzzer has a vibration source inside, so it will be called as soon as it is powered on 2 The program control is convenient, the single chip microcomputer can make it sound with a high and low level, but the passive buzzer can’t do it. A module description 1 The module is driven by 9012 transistor 2 Working voltage 3.3V-5V3 With fixing bolt holes for easy installation 4 Small board PCB size: 2.8cm * 1.3cm Two module interface description (3-wire system) 1 external 3.3V-5V voltage (can be directly connected to 5v microcontroller and 3.3v microcontroller) 2-external GND3 out external microcontroller IO port
