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hey, for school we have to make an alternative energy project. I got the idea of putting piezo ceramics on the bottom of my shoes and measuring how much energy I can gain each school day. could somebady tell me what the proper piezo ceramic would be for this project and how I should go about storing the electricty? thanks in advance.
Registered Member #50
Joined: Thu Feb 09 2006, 04:07AM
Location: Vernon, B.C, Canada
Posts: 324
Piezo Electric Ceramics produce high voltages at low currents, like in a Barbecue Lighter. It would probably be quite a process to store the energy and be able to use it.....
Registered Member #27
Joined: Fri Feb 03 2006, 02:20AM
Location: Hyperborea
Posts: 2058
The gas ignitor types are designed for high voltage, if you use a sheets of piezoelectric material you can get low voltages at usable currents. Connecting it through a rectifier to a capacitor or rechargable battery should do the trick.
It all depends on how much time, money and skill is available.
Banned on April 8th, 2007. Registered Member #597
Joined: Thu Mar 22 2007, 03:33AM
Location: Seattle, WA
Posts: 16
thermonub wrote ...
hey, for school we have to make an alternative energy project. I got the idea of putting piezo ceramics on the bottom of my shoes and measuring how much energy I can gain each school day.
You might try hooking a "piezo beeper" brass disk up to a DVM voltmeter. Wrap the piezo element in paper (as insulation) and then bend it with fingers to see how high a voltage you can create.
Here's an ebay seller who has all sorts of fairly thick piezo disks and rings, prices under $20. There might be cheaper sellers if you look around.
Registered Member #32
Joined: Sat Feb 04 2006, 08:58AM
Location: Australia
Posts: 549
Hazmatt_(The Underdog) wrote ...
You can also grow your own piezio's too if you get some Rochelle Salts from your chemistry department.
Rochelle salt (NaK tartrate) is simply what you get if you boil bicarb soda and cream of tartar together. Both of these are available at any supermarket.
Registered Member #350
Joined: Mon Mar 27 2006, 05:14PM
Location:
Posts: 106
I found this iste
They build shoes using piezoelectric materials and also some using an electromagnetic generator. The piezoelectric ones produced only 10mW on average. The electromagnetic shoes on the other hand got 250mW. Unfortunatelly they are also much less practical and uncomfortable to wear.
10mW might already be enough to charge your cell phone if you walk a lot and use the phone very rarely. Otherwise it's not of much use.
Registered Member #350
Joined: Mon Mar 27 2006, 05:14PM
Location:
Posts: 106
Of course an easier way to charge your cell phone outdoors is to use a solar cell. You can put it anywhere you want - including on your shoes - and it will easily produce a lot more power then a piezo ceramic. Even when you are not walking.
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piezo electricity and walking
