Hello everyone, longtime listener, first time caller...
I have a simple circuit I've built up to experiment with opamps. I've included a crappy picture of it. It's a basic non-inverting op amp circuit.
I have a 10K resistor at R1, and a 2K2 resistor at R2. 10/2 + 1 == 6. Which is the gain I expect. However, I'm only getting a 1.2 gain, as if the resistors are switched. If I switch the resistors so I have 2K2 at R1 and 10K at R2 I get a gain of six! I'm measuring the gain with my Rigol Oscope, sorry I didn't include any screen shots.
I know I'm doing something wrong, because every opamp calculation says R1/R2 +1 for a non inverting circuit, I'm getting just the opposite. WTH!!!
PS the opamp is a TI tlo82 dual opamp if that matters, I've checked the pinout many times...
Thanks,
Brian