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.
若是自激式Self-drive (DC/內含線路circuit-bulit in )的蜂鳴器,不管是電磁,還是壓電的,給予額定的電流及電壓即可,
電磁式蜂鳴器(Magnetic Buzzer)應給予1/2方波(square wave),及在啟動時,確保至少有三倍於額定消耗電流的電流,
壓電式蜂鳴器(Piezo Buzzer)的則給予方波, 若給1/2方波,極可能不會動作,因為只有半週的動作,