Passive buzzer is characteristic:
- Passive internal without oscillating source, so if the DC signal not to tweet. Must use 2K~5K Fang Bo to drive it
- Voice frequency controllable, can make a ” wise guy hair rope lacidipine effect”.
- In some cases, and LED can multiplex a control orifice
The feature is active buzzer:
- Active buzzer with vibration source, so long as a power will be called
- Procedures convenient control, a single level can make it sound, while the passive buzzer can not do it.
- The 1 module uses a 9012 transistor drive
- 3.3V-5V working voltage
- Is provided with a fixed bolt hole, convenient installation
- Small PCB size: 3.3cm * 1.3cm
The two module interface description ( 3 line ):
- VCC external 3.3V-5V voltage ( can be directly related to 5V single chip and 3.3V chip. )
- GND external GND
- I/O external singlechip IO mouth