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wizodd
Active Contributor

Join Date: Jun 2008
Posts: 12
Good Answers: 1

Wanted: Small, Low Output, Thermoelectric Generator

09/30/2008 3:17 PM

Many years ago, in Design for the Real World, there was a radio designed for 3rd world areas which consisted of a small radio circuit mounted on a tin can which had thermocouples mounted to provide power by burning materials in the can.

I am looking for a way to generate 3-5 volts at 20ma (to light an LED) from a heat source which is in the 500F range to a sink which is between 50-125F.

Material readily available in the product is Titanium.
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Pathfinder Tags: thermoelectric thermoelectric generator
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electrone
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Join Date: Jan 2006
Posts: 377
Good Answers: 2
#1

Re: Wanted: Small, Low Output, Thermoelectric Generator

09/30/2008 6:46 PM

Just a note to people out there: I did some experimenting with using a Peltier junction to generate electricity and found it to be a lot of trouble to produce only a little power. I do not think this problem necessarily applies to the application here, though.
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Anonymous Poster
#2

Re: Wanted: Small, Low Output, Thermoelectric Generator

09/30/2008 11:27 PM

There is a design in 'Popular mechanics' do it yourself encyclopedia. it requires two different types of wire and is powered by a candle
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wizodd
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Join Date: Jun 2008
Posts: 12
Good Answers: 1
#3
In reply to #2

Re: Wanted: Small, Low Output, Thermoelectric Generator

10/01/2008 1:49 AM

Thanks, the key search words were "candle radio thermoelectric."

Old version:

http://oak.cats.ohiou.edu/~weinfurt/thermoradio.htm

New version:

http://www.micromavt.ethz.ch/education/A_Candlelight_Powered_Mini-Radio_with_Micro_Thermoelectric_Cu_Ni_Generators.pdf
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