Can Piezoelectric Crystals Generate Electricity Under Stress?

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Discussion Overview

The discussion revolves around the ability of piezoelectric crystals to generate electricity when subjected to stress. Participants explore the theory behind this phenomenon, its applications in various devices, and the efficiency of such systems.

Discussion Character

  • Exploratory
  • Technical explanation
  • Conceptual clarification
  • Debate/contested

Main Points Raised

  • One participant wonders if applying stress to a piezoelectric crystal would yield an electric pulse and inquires about existing machines based on this theory and their efficiency.
  • Another participant confirms that there are indeed devices, such as accelerometers, that utilize the deformation of piezoelectric crystals to produce electrical charges, which are then processed through amplifiers and conditioners.
  • A participant shares a personal experience with skis equipped with a piezo cell and LED, suggesting that it converts vibrations to electricity, although they express skepticism about its effectiveness.
  • Multiple participants mention various applications of piezoelectric technology, including propane grill lighters and electronic cigarette lighters, highlighting their function in generating sparks through mechanical stress.
  • One participant notes that piezoelectric microphones are commonly used in modern phones, suggesting a broader prevalence of this technology in everyday items.
  • Another participant reflects on the use of piezoelectric elements in children's shoes, initially thinking it was for amusement but realizing it serves a functional purpose.

Areas of Agreement / Disagreement

Participants generally agree that piezoelectric crystals can generate electricity under stress and that there are various applications for this technology. However, there is some skepticism regarding the effectiveness of specific implementations, such as in skis.

Contextual Notes

Some claims about the efficiency of piezoelectric devices remain unverified, and the discussion does not resolve the effectiveness of specific applications mentioned.

Who May Find This Useful

This discussion may be of interest to those exploring applications of piezoelectric technology, including engineers, hobbyists, and students in physics or materials science.

extreme_machinations
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Piezoelectric Crystal Vibrates When Subjected To An Electric Pulse ,
Now
I Wonder If Putting Stress On A Piezoelctric Crystal Would Yeild An Electric Pulse ??
And If That Is So, Are There Any Machines Based On This Theory ?and If There Are ,how Efficient Are They ??
 
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Yes. There definitely are. Look up accelerometers and many different forms of instrumentation. They all use the deformation of a piexoelectric crystal to produce a charge which is sent thru a charge amplifier and then signal conditioner. The end signal is a direct function of the imput.

One of my standard suppliers is Endevco. They have a lot of information on the effect.
 
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My skiis have a piezzo cell and an LED. Its probably mostly hype, but its supposed to convert vibration to electricity (and light the LED) to help keep the skiis on the slope. If you bang on the skiis with your knuckles, the LED lights up.
 
FredGarvin said:
Yes. There definitely are. Look up accelerometers and many different forms of instrumentation.
He probably already either owns or has seen one—the cartridge in a turntable.
 
Those lighters on propane grilles are piezoelectric lighters. When you push the button, you cause a a rod to slam into a set of piezoelectric crystals causing a voltage large enough to make a spark that ignites the gas.
 
Chi Meson said:
Those lighters on propane grilles are piezoelectric lighters.
Right. Also electronic cigarette lighters. Most phones, I think, now use piezo microphones as well. There are probably dozens of everyday examples that we just never even think about.
 
russ_watters said:
My skiis have a piezzo cell and an LED. Its probably mostly hype, but its supposed to convert vibration to electricity (and light the LED) to help keep the skiis on the slope. If you bang on the skiis with your knuckles, the LED lights up.

Ahhh... Now I know why they put those in kids shoes, and here I always thought is was simply for amusement, in actuality it is so they will know when their feet hit the ground. :biggrin:
 
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thank god it work !
well that clears up a few things for my furure project,
thankks guys !
 

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