Universal passive buzzer electromagnetic impedance 16 ohms AC / 2KHz 3V 5V 12V Universal

Difference between Active buzzer and Passive buzzer

1 Active and passive here “source’ does not refer to the power supply, but refers to the shock source. That is to say, the active buzzer has an internal shook source, so it will sound as soon as it is powered on And the passive internal without vibration source, so if you use DC signal can not make it calf It must be driven by 2K – 5K square wave. The active buzzer is often more expensive than the passive one because there are many oscillation circuits in it This is the way to separate by dnving principle,

2. From the appearance of figure a and D the two kinds of buzzers seem to be the same, but look carefully, the height of the two kinds of buzzers is slightly different The height of active buzzer A is 9mm, while the height of passive buzzer B is Bmm. If the pins of the two kinds of buzzers are placed upward, we can see that the one with green circuit board is passive buzzer, and the one without circuit board and sealed with black glue is ad. buzzer.