Piezoelectric driver finds buzzer s resonant frequency

www.edn-europe.com | Sep 1, 2008

Piezoelectric buzzers find wide use as audible-signal generators because of their low power consumption and clear, penetrating sound. An external driver or a self-driven circuit that oscillates at the resonant frequency of the piezoelectric element can drive these buzzers. A piezoelectric element

http://www.edn-europe.com/piezoelectricdriverfindsbuzzersresonantfrequency+article+2400+Europe.html

Piezoelectric driver finds buzzer’s resonant frequency

www.edn.com | Aug 7, 2008

By driving a piezoelectric buzzer near its resonant frequency and counting the residual oscillations, a microcontroller can find the buzzer's resonant frequency.

http://www.edn.com/article/CA6582855.html?spacedesc=designideas&industryid=44217

Voice-Capable Alarms issue customizable spoken warnings.

news.thomasnet.com | Apr 30, 2008

April 30, 2008 - Replacing ambiguous beep with voice instructions or warnings, Announcer(TM) Series alarms play pre-recorded audio message up to 10 sec long at 95 dB.

http://news.thomasnet.com/fullstory/816564

Low-cost techniques for sound generationBy: David Hinerman

www.mechatropolis.com | May 29, 2003

When designing a low-cost device where pennies count, we need a creative and inexpensive way for the device to communicate effectively with the user. Using sound as output requires comparatively few system resources relative to the amount of i

http://www.mechatropolis.com/Articles/221/Low-cost_techniques_for_sound_generation.htm

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eBay.co.uk Shop - VirtualVillage-USA: Consumer Electronics: 6 X Precision Potentiometers Trimmer

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VirtualVillage-USA: Consumer Electronics - 6 X Precision Potentiometers Trimmer Trim 4.7K 10K 47K, 2 Belt Clips for Motorola Radios HT750 HT1250 HT1550, 10 X 3 Pins TF541 SCR Thyristors 5A 400V Controllers, and - all at low prices

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