Re: Thermopile Generator

In message <1155927402.372822.166010@xxxxxxxxxxxxxxxxxxxxxxxxxxxx>, dated Fri, 18 Aug 2006, BobG <bobgardner@xxxxxxx> writes
I went down to my local HVAC parts store and bought one of those Honeywell thermopiles (they are supposed to detect the pilot light and generate enough juice to hold the relay open that supplies the pilot. If it blows out, the gas shuts off). They are about $35 ea. I couldn't get 700mv out of it... tried the hot air gun, fire... I was hoping several of em in series might be able to fire up a wide input dc to dc switcher. Results so far are inconclusive...

They produce about 40 uV per degree Celsius per junction. So at 400 C, you should get 16 mV per junction.

Thermocouples are VERY low impedance sources. You can work a solenoid with one at red heat.
--
OOO - Own Opinions Only. Try www.jmwa.demon.co.uk and www.isce.org.uk
2006 is YMMVI- Your mileage may vary immensely.

John Woodgate, J M Woodgate and Associates, Rayleigh, Essex UK
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Relevant Pages

  • Re: Thermopile Generator
    ... Honeywell thermopiles (they are supposed to detect the pilot light and ... generate enough juice to hold the relay open that supplies the pilot. ... They produce about 40 uV per degree Celsius per junction. ...
    (sci.electronics.design)
  • Re: Thermopile Generator
    ... I went down to my local HVAC parts store and bought one of those ... Honeywell thermopiles (they are supposed to detect the pilot light and ... fire... ...
    (sci.electronics.design)