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Two TECs!
I couldn't resist trying a second external TEC - 15V 8A at 12 volts, reducing the cold to hot side temperature differential of the internal TEC, which is a measure of performance.
Running the internal TEC at 1.2 volts and the external at 12 volts, reaching 20C differential it was turned off allowing the sensor temperature to drift up to the internal TEC max differential of 8 - 9C. With the external TEC at 10.1 volts (need a different power supply to get a lower voltage) max diff was 15C.
A few more degrees differential would be nice, requiring a fresh look at the dimensions of the copper strip and the rating/performance of the internal TEC.
Last edited by rcheshire; 02-06-2013 at 06:03 AM.
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