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How can I construct a piezoelectric generator using cheap materials??

Hello! I am asking this because I need help in making my research project for my fourth year in high school. The concept of my research is to harvest energy from people stepping on something similar to stairs. after harvesting the energy, I plan on storing it in a pair of AA NiMH batteries for future storage, but I am still not sure on how I will go about this. As a high school student, I don't have any advance knowledge on making generators like you brilliant people do.  Please help me. Thank you!

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science-tech2 months ago

https://www.instructables.com/id/generate-electricity-by-walking/

science-tech2 months ago

hi check it out for some basic info.If you want more info ask me i will make a instructable with better explination

AdarshM213 months ago

I am browsing [HOW TO - make piezo crystals at home | ...]. Have a look at it! https://www.google.co.in/url?sa=t&source=web&cd=&ved=0ahUKEwiWz63N7OLRAhUHvY8KHbOFD2cQFggjMAE&url=http%3A%2F%2Fmakezine.com%2F2008%2F07%2F31%2Fhow-to-make-piezo-crystal%2F&usg=AFQjCNG6WAs8mjrOVhg4hQ-wK8aYgaG6FA

iceng2 years ago


Watch the piezo spark punch holes in card stock.

Sorry about the jumpy vid.

The lever presses on a two piezo ceramic crystals

I'm pressing 5lb worth.

You could feed the tiny current into a battery using a DC bridge and a capacitor as a coulomb collector and avoid the stunning 20KV spark...

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maxene (author)  iceng2 years ago

Thank you very much!

By the way, may I ask you where you bought or acquired the two piezo ceramic crystals that you used? Thank you very much for taking your time to answer my queries. :)

iceng maxene2 years ago

A Company called CLEVITE made that to give out to young engineers (me) who specified electronic parts for product designs.

When you hear the spark snap I feel the pressure on the press bar release.

At one time I had a design using a series of four crystals moving a linear ratchet motor to be used as a simple electronic car jack that was under a inch in diameter as extension tubes, a camera style flash would drive it today, but back then I only had SCRs for the driver.

If the math says it can lift a car you can probably make a measurable generator.

I'm sure there are people making similar piezo xtals today, try searching under piezo bender.

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piezo crystals are used in cheap cigarette lighters, and barbecue lighters, or as gasfire igniters

rickharris2 years ago

To generate a reasonable amount of energy to charge batteries - you can't.

Piezoelectric materials produce very small currents at a high voltage. Great for getting a spark but not for producing significant amounts of power (watts).

You could however design a rocking platform to drive a conventional generator, or a platform that moved up and down under weight for example.

There is this

but no evidence it worked.

https://www.google.co.uk/search?q=piezo+battery+ch...

https://www.instructables.com/answers/I-wonder-if-i...

maxene (author)  rickharris2 years ago

I see. Thank you very much!

Thanks for the tip! But I have one more question, does the kind of piezoelectric material (e.g. discs, crystals, patches etc.) used affect the amount of electricity it can generate? And if yes, what kind of piezoelectric material can generate the most electricity?

Thank you very much for taking your time to answer my queries. :)

'cheap' and 'most electricity' are not compatible. The shape affects the voltage and the current.Rick isn't quite right. Piezo-electrics generate CHARGE. where you put it afterwards is up to you.

There are similar tecnologies for cars, like Powertread or another one which's name I can't remeber but works similarly. You could try to use something similar instead of using piezoelectricity.