Active Buzzer module

Description

1, module uses S8050 transistor drive
2, the working voltage 3.3V-5V
3, with a fixed bolt hole, easy to install
4, small board PCB size: 3.2cm * 1.3cm
5, when the I / O port input high Normally, the buzzer sounds

B. Interface Description
1, VCC external 3.3V-5V voltage (can be directly connected with the 5v microcontroller and 3.3v microcontroller)
2, GND external GND
3, I / O external microcontroller IO port

C. the active buzzer and passive buzzer easy way to distinguish ความแตกต่างระหว่าง active และ passive buzzer
The fundamental difference between active buzzers and passive buzzers is that the requirements for the input signal are different; the ideal signal for active buzzers is DC, which is usually labeled VDC, VDD , and so on. Because the active buzzer has a simple internal oscillation circuit, can be a constant DC into a certain frequency of the pulse signal , from the surface of the magnetic field alternating, driven molybdenum vibration sound. But in some active buzzers in a specific AC signal can also work, but the AC signal voltage and frequency requirements are high, this work is generally not used. 
  Passive buzzer no internal drive circuit, some companies and factories known ashearing gas, the national standard called the sound device. Passive buzzer works with ideal signal square wave. If the buzzer is not responding to the pre-dc signal , the magnetic circuit is constant and the molybdenum sheet can not vibrate. 
Active distinction Simple passive electromagnetic buzzer and electromagnetic buzzer