Dave VanHorn says
Driving a piezo from a micro usually follows a pattern..
One lead grounded, one lead to the micro. Too soft.
Both leads to the micro, driven in opposition. Nice and loud.
Then the strange behaviour begins.
After a while, you notice the similarity in the schematic between a charge pump voltage doubler and your piezo element and port pins, and you realize that every time you flip the piezo, you are flirting with SCR Latchup or glitching your micro.
Then you drive it through a pair of HC inverters at least, and get "happy beeps"
Piezos are also used as pressure sensors +
|file: /Techref/piezos.htm, 1KB, , updated: 2006/1/24 08:35, local time: 2022/1/18 08:07,
|©2022 These pages are served without commercial sponsorship. (No popup ads, etc...).Bandwidth abuse increases hosting cost forcing sponsorship or shutdown. This server aggressively defends against automated copying for any reason including offline viewing, duplication, etc... Please respect this requirement and DO NOT RIP THIS SITE. Questions?|
<A HREF="http://www.piclist.com/techref/piezos.htm"> Piezos</A>
|Did you find what you needed?|
PICList 2022 contributors:
o List host: MIT, Site host massmind.org, Top posters @20220118
* Page Editors: James Newton, David Cary, and YOU!
* Roman Black of Black Robotics donates from sales of Linistep stepper controller kits.
* Ashley Roll of Digital Nemesis donates from sales of RCL-1 RS232 to TTL converters.
* Monthly Subscribers: Gregg Rew. on-going support is MOST appreciated!
* Contributors: Richard Seriani, Sr.
Welcome to www.piclist.com!