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.

Module description:

• 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