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Topic Title: Need to step up voltage from 1.2V to 5V in seebeck pelteir plate setup
Topic Summary: Need to step up voltage from 1.2V to 5V in seebeck pelteir plate setup
Created On: 17 January 2014 10:51 AM
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 17 January 2014 10:51 AM
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yigiter007

Posts: 1
Joined: 17 January 2014

My project is that I want to USB fire charger. Its a device that you place on or near fire that will use the Seebeck effect of a pelteir plate to charge a USB device.

So far I learned that i will only get 1.2 volts from a pelteir connected with a Schottky diode. USB ports need 5 V to charge any device.

I looked online on ways to step up voltage and the thing i found is a charge pump. Is the only way to step up voltages from 1.2 V to 5 V. I also found this link that steps up a solar panel voltage to 5 V, could the panel be swapped with a pelteir plate. (Link removed/pr...ly5vSolar.h...)

Thank you for your replies in advance.
 17 January 2014 01:01 PM
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ANFierman

Posts: 138
Joined: 25 July 2008

You can try googling for:

"peltier seebeck effect step up converter charger"

I found these:

http://www.scraptopower.co.uk/...ic/thermoelectric-pan

http://hackaday.com/2013/12/02...vesting-peltier-ring/

http://www.instructables.com/i...rger-Powered-by-Fire/

You will need to read up about step up converters. Switched capacitor is a very crude and not very efficient way to do it.

Have a look here:

http://en.wikipedia.org/wiki/Boost_converter

http://www.onsemi.com/pub_link/Collateral/SMPSRM-D.PDF

http://www.smps.us/Unitrode.html

Most of the major semiconductor manufacturers supply boost converter chips, many with evaluation boards.

-------------------------
Andy Fierman

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http://signality.co.uk
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 17 January 2014 06:00 PM
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kengreen

Posts: 400
Joined: 15 April 2013

How about the nasty techniques used in switcher PS?
Chop the dc-input, step-up transformer, fw rectifier - quite safe at 1 to 5 volts.

Ken Green
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