User:ReggiKunz697

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Revision as of 05:20, 10 May 2012 by ReggiKunz697 (Talk | contribs) (New page: The [http://evan2012yu.wordpress.com/2012/05/09/knowledge-about-piezo-buzzer-china/ piezo buzzer] use piezoelectric ceramic piezoelectric effect to drive the vibration of the metal to mak...)

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The piezo buzzer use piezoelectric ceramic piezoelectric effect to drive the vibration of the metal to make voice. Electromagnetic buzzer use the principle of electromagnetic,metal diaphragm will be sucked under power .while under no power,it use the elasticity of diaphragm to rebound, so the piezo buzzer use the square wave to drive, electromagnetic is 1/2 square wave driver.

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