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Hello Rocketscream. Thank you for your precious help. As you may remember, I purchased the oven reflow board etc which worked well for me. Since then I’ve incorporated the ‘temperature basic 1R20’ circuit onto my own PCB and got it working ok but there seems to be an error. This is what happens:
I turn the PCB on and my LCD gives me the same value for the internal temp as the probe temp ie room temp. Gradually the internal temp increases, but so does the probe temp, even though room temp is a constant 17 degrees C. If I put the probe in boiling water it gives 107 degrees C, so there is obviously an error somewhere. The internal temp stabalises at about 25 degrees C with room temp stable at 17 degrees C. I’m wondering whether this could be a hardware or software problem? Thank you.
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