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More  Beeper & Buzzer Circuits

HIGH SOUND OUTPUT BEEPER
 

If you need a real loud beeper, this circuit delivers about 110db (12 inches away) from a 9v battery using a single inexpensive C-MOS IC. An off-the-shelf piezoelectric beeping device is driven at resonance to insure maximum efficiency. By changing the control IC to a 74AC14, the same circuit can operate from 3v and 1.5v batteries. Published in Electronic Design, Aug 5, 1993

Click on Drawing Below to view PDF version of Schematic

Circuit power reminder beeper designed by Dave Johnson, P.E. (June 3, 2000)

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