Hi, im making an amplifier for a coil in such a way what the output (an LED here) turns on when a magnet passes by the coil. I'm using the tlc272 dual op amp, but for now im using only one of the two op amps.
My question is that when i connect the inverting (-) input to ground and the coil to the non inverting (+) input, and the other end of the coil to ground, it gives me a high output, and it is when i pass the magnet over to coil that it goes low. I was expecting for it to do the opposite. What's the problem here? Is that how the tlc272 behaves normally? I'm using a 9V battery to power this op amp.