I have a current shunt and i'm using an opamp to amplifiy it, the only problem is that if i supply it to +12V which is powered by a 5w transformer the voltage drops by a couple 100mV and so the opamp output changes which changes the current readings. To prevent this i am planning to power it from +5V and -12V like in the picture, i just don't know if i can power it like this with different potentials?