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A piezo buzzer contains a piezoelectric element combined with an in-built oscillator / driver to produce an audible sound. While the output frequency is fixed using them is as simple as applying a DC voltage within the specified range.

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How do you remove the buzzer from this PCB whose solder side is inaccessible?

You could quieten the buzzer by filling the hole in the top of the plastic. If you pour in something rubbery (hot glue could be good) then it would almost certainly muffle the sound. To remove it, I' …
Toby Jaffey's user avatar
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