I am trying to build a simple temperature controller cct using what I had in stock.
I find the circuit switching with the voltage on pin 2 at or about 1.8 volts when the input is at 0.223 volts. I am thinking it is because of noise but after spending a few hours on it, I am hoping someone can point me in the right direction. I have tried capacitors at various locations to cut back on noise but decided I might be totally off. The null pins are not connected now and I tried a pot between them with wiper to ground but no difference either.
I find the circuit switching with the voltage on pin 2 at or about 1.8 volts when the input is at 0.223 volts. I am thinking it is because of noise but after spending a few hours on it, I am hoping someone can point me in the right direction. I have tried capacitors at various locations to cut back on noise but decided I might be totally off. The null pins are not connected now and I tried a pot between them with wiper to ground but no difference either.