Active Buzzer Alarm Module for Arduino KY-012 (Oem)

HR0011
AA0409

This is a active buzzer so its easy in use. You just apply voltage to the buzzer and it makes sound. Disadvantage is that you can't determine the frequency of the sounds, for this you need a passive buzzer.

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This is a active buzzer so its easy in use. You just apply voltage to the buzzer and it makes sound. Disadvantage is that you can't determine the frequency of the sounds, for this you need a passive buzzer.

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HAITRONIC
MPN
HR0011
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