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Thinking outside the box, proportional voltage to a TEC or heater, could be controlled by attaching a stepper motor to a potentiometer shaft, controlling with a microprocessor. A little calibration may be required, but once the correct position is set, fine control could be achieved by dithering either side of set point. Changes in energy demands, due to ambient temperature could be programmed as well. I dont think this would be too difficult to do with an Arduino, for instance.
Last edited by rcheshire; 28-03-2013 at 12:57 PM.
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