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Buzzer Circuit

 

For a self- drive buzzer ( DC/ circuit- built), either pizeo or magnetic just apply the rated current and voltage.


 For the external-drive buzzer, it depends on,


1. We should give magnetic buzzer 1/2 square wave, and provide it at least 3 times the amount of the rated consumptive current.


2. Otherwise, we give square wave to the peizo buzzer instead of 1/2 square wave, because the half wave might cause the buzzer does not work.

Therefore, voltage control is an important factor for a peizo buzzer which is driven by the voltage.

Magnetic circuitsPiezo circuits