working on a comparator circuit which measures two different voltages on two seperate op amps then using a NAND gate , if both op amp outputs are same then output drives LED (going to be a 400 ohm relay)
Looks like he used two NAND gates to make an AND gate, not a OR gate, both inputs need to be logic 1, or did I miss something?
I was under the assumption that both inputs must be true, else relay is off. Actually after re-reading OP I wonder if he wants XOR function? I did not mean to offend, often forum communication creates misinterpretation.
Why do you think you are offending me.
Like you I dont not know for sure what the OP wants to do.
I assumed that the mention of two diodes would start bells ringing in MrDebs head, as a possible solution.