High Quality Active Buzzer Module for Arduino

Description
The characteristics of a passive buzzer are:
1. There is no vibration source inside the passive source, so it cannot be made to sound if the DC signal is used. It must be driven by a square wave of 2K~5K
2. The sound frequency can be controlled, which can make the effect of "Dolemifasolasie".
3. In some special cases, you can reuse a control port with the LED
The characteristics of an active buzzer are:
1. The active buzzer has a shock source inside, so it will call as long as it is powered on
2. Convenient program control, single chip microcomputer a high and low level can make it sound, but passive buzzer can not do.
The weight of each set is about 6g
Module description
1. The module is driven by 9012 triode
2. Operating voltage 3.3V-5V
3. Fixed bolt hole is provided for easy installation
4. PCB size: 3.3cm * 1.3cm
Module Interface Description (3-wire system)
1.VCC external 3.3V-5V voltage (can be directly connected to 5V microcontroller and 3.3V microcontroller)
2. The GND external GND
3.I/O External I/O port of the microcontroller