https://pm.haifa.ac.il/index.php?title=ReavesDeweese690&action=history Revision history for this page on the wiki en MediaWiki 1.15.1 Wed, 02 Sep 2026 03:33:14 GMT https://pm.haifa.ac.il/index.php?title=ReavesDeweese690&diff=31727&oldid=prev <p>Created page with &#39;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 met…&#39;</p> <p><b>New page</b></p><div>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 make voice.<br /> 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.</div> Thu, 10 May 2012 05:25:15 GMT ReavesDeweese690 https://pm.haifa.ac.il/index.php?title=Talk:ReavesDeweese690