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where can i buy a piezoelectric generator and how much does it cost please help me out? Answered

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Jack A LopezBest Answer (author)2012-09-29

I can think of two different kinds of mass produced piezo module that you might be able to find cheaply. 

The first kind is a piezoelectric speaker, an audio transducer, of the kind found in alarm clocks, alarms, and other noise makers.  Here is an example of an artifact containing such a piezo speaker:
http://www.dollartree.com/school-office-supplies/Tools-Batteries-Lightbulbs/Window-and-Door-Alarm-System/291c439c439p184790/index.pro

The second kind is one of those piezo spark modules, of the kind found in some kinds of butane lighters.  Here is an example of an artifact containing such a piezo spark module:
http://www.dollartree.com/cleaning-storage-hardware/Household-Supplies/tools-tapes-adhesives/Click-n-Flame-Refillable-Long-Reach-Butane-Lighters/212c309c263p305704/index.pro

BTW, both those links are from a retail chain in the Former US, called DollarTree(r), and the price of both those items is 1 USD, because that's sort of their gimmick.  Everything item in a DollarTree(r) store costs 1 USD.

Back to the subject of the modules themselves:  the spark making module from the barbeque lighter,  is good for making a brief pulse of electricity at very high voltage.  BTW, I wrote an instructable on the subject of re-packaging one of these modules into the body of a ballpoint pen.  This ible has some pictures of the modules themselves, and of some playful things to do with the finished piezo-pen, like (briefly) lighting old fluorescent lights, here:
https://www.instructables.com/id/Piezo-Pen-Pulsed-Power-Source/

In contrast, if you want a continuous power signal, then using a piezo speaker, like the kind found in an alarm clock, or that door-window alarm thingy linked above.  Of course to get a continuous electrical power out would require a source of continuous mechanical power, essentially sound power, input.  Maybe you could drive it from a whistle powered by compressed air or steam.  Or maybe some kind of  thermoacoustic set up.
https://www.instructables.com/answers/Thermoacoustic-electric-generation-at-high-frequen/

By the way, I am guessing that whatever you are building, you want to start small. That's why I linked to that dollar store junk.  Well, that, and I don't actually know where you'd find expensive, high-powered, piezo transducers. 

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sandiri (author)Jack A Lopez2012-10-01

thank you sir for your valubel information

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eng_yehia (author)2014-01-22

it will generate a spark that makes the output gas fire ... very thanks for profissors who helpes us

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eng_yehia (author)2014-01-22

it will generate aspark that makes the gas fire ... very thanks to the profissors who helps us ..

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jbaker22 (author)2012-09-30

I just pulled one out of a dead BBQ lighter last night
.

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AndyGadget (author)2012-09-29

 
THIS
video shows a simple piezo microphone disc (widely available) driving a LED.  I wouldn't have thought there was enough current there but it appears to work.

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sandiri (author)AndyGadget2012-09-29

however such an amout of pressure applied there might be sufficient for an led to glow since it requires very low voltage

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AndyGadget (author)sandiri2012-09-30

It depends on the piezo material, the rate of change of the force applied and the area its applied to.  The spark lighters give a very short, sharp shock to a length of piezo to generate the high voltage.  A piezo sounder is a less intense force over a larger area so lower voltage at higher current. 
From a previous project I know you will get around 25V from tapping a piezo disk.  The LED will limit this to its forward voltage drop; 1V to 3V, depending on colour.
However, the proof of the pudding is in the eating and I'll try this out later today as I'm curious to know whether it works.

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AndyGadget (author)AndyGadget2012-09-30

 
I've just tried this with a 35mm sounder and get exactly as I'd expect (and Rick describes).  A brief flash when tapped, but nothing when squeezed, whereas the video I've linked does give a decent output when pressure is applied slowly.  Strange.

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rickharris (author)AndyGadget2012-09-30

maybe it needs to be on a soft compliant surface??

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rickharris (author)sandiri2012-09-30

Yes connect a Piezo sounder to an led and tap it and the LED will flash BUT you will only get a flash unless you devise a way to tap the sounder very quickly and many times > 25 a second.

This is a demo we used to do at school.

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steveastrouk (author)2012-09-30

There's a special chip made by a company called Linear Technology which is designed to store piezo pulses and pump them onto a supercap.

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iceng (author)2012-09-29

This piezoelectric generator can be had free used or a few dollars.

A

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sandiri (author)iceng2012-09-29

sir can u please post me the link from where u have seen this picture so that i can understand how it works

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steveastrouk (author)sandiri2012-09-30

The word in English is "you", if you use the SMS "u" it makes you look like you are about 10 years old.

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sandiri (author)steveastrouk2012-09-30

i am really very sorry for using such language

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sandiri (author)2012-09-29

it's not for commercial use it's my project and i want to generate electricity using a piezoelectric generator by applying stress on it

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rickharris (author)sandiri2012-09-29

How much from what sort of activity and what for

All these things matter.

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rickharris (author)rickharris2012-09-29

In general Piezoelectric device that are readily available generate a short high voltage output - enough to make a spark.

Piezo materials can be found on the web. and you can make your own with varying degrees of difficulty.

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rickharris (author)rickharris2012-09-29

https://www.instructables.com/pages/search/search.jsp?cx=partner-pub-1783560022203827%3Anpr2q7v5m6t&cof=FORID%3A11&ie=ISO-8859-1&q=make+Piezo

Here are some links which may help.

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sandiri (author)rickharris2012-09-29
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steveastrouk (author)2012-09-29

Then you can use the piezo igniter from a lighter. It will be free ! Your profile doesn't say where you are in the world to make any more informed comment

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sandiri (author)steveastrouk2012-09-29

is it the lighter used in domestic appliances or anything else can u please be little more clear regarding this sir

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steveastrouk (author)sandiri2012-09-29

Yes, the things used in domestic appliances and cigarette lighters, and for portable gas stoves, etc., etc.

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rickharris (author)2012-09-29