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I had both heating and cooling in mind, for DSLRs. It needs to be within 1C or so. The sensor output stays within 1 or 2mV. Not too bad.
EDIT: adding an extra stage appears to sum all the steps producing a square wave.
for heating swap the + and - pins; reference on - and input +
Last edited by rcheshire; 27-10-2015 at 03:01 PM.
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