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  • posted byclough42 on 03/05/2013

    This is an amplified piezoelectric speaker. It uses a transistor to amplify a logic-level signal and drive the piezo unit. This is not a buzzer. You must provide a waveform on the S pin to get a tone out of the speaker. There is no built-in tone driver. When you pull the S pin low, the speaker emits ... Read more

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