I want to learn more about Op-Amps and amplification so I am making a simple differential amplifier. The circuit looks like this... I set it up and it isn't working correctly. First I tried putting 3 volts for Vin+ and ground for Vin-, and the voltage accross Vout was around half a volt. I don't understand this result. Shouldn't it be an amplification of the difference in voltage? (Which is 3 volts correct?) How can I get half a volt? I didn't know what value of resistors to use so I used 100 ohm for RC1 and RC2 and 150 ohm for Re (Completely arbitrarily chosen). Can anyone help me out? Thanks!!