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Circuits designed by David Johnson, P.E.
Last Updated on:
Saturday, December 23, 2017 03:21 PM
List of Dave's Circuit Designs
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More
Beepers & Buzzers;
Piezo
Circuits |
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Very Loud 3v Powered Beeper --
August 16, 2009 |
Getting a high sound intensity from a piezoelectric type beeper is not easy when the
available DC supply is only 3v. The circuit below is not only efficient but
produces a very intense sound. The circuit combines a voltage boost section with
a resonant feedback network. The voltage applied to the piezoelectric wafer is
about 40 volts peak to peak. The result is a circuit that generates an attention
getting sound without drawing a lot of current. |
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Click
on Drawing Below to view PDF version of Schematic |
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