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Have I missed something here Rowland? How are you displaying the setpoint and actual temperature of the sensor? I can't see a display circuit in the last schematic?
Secondly your response time/ over/under shoot time doesn't seem to be different from the 'big rig' PWM/Temperature Controller model. Is this going to improve in later versions or is it selectable in some way? Seems like you maybe doing exactly the same sor of circuit presently available in the ebay 12V temperature controllers. Not being critical, as it will be smaller for sure but I want to understand what the benefits might be of changing over from my 'big rig' setup.
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