Hello I am trying to build this circuit to give me an output of 4.5 volts when the current across the 1 ohm resistor is 0.4 amps. I have tested the differential part of the circuit and it was working but when I build the other parts of the circuit it doesnt want to work. And another problem I found is that when I reduce the current across the 1 ohm resistor to 0 amp the out put reads 0.7 V. The part that does not want to work is the one circled in blue. I have been working on this problem for 2.5 weeks now and I seem to have run out of ideas. What can possible be the problem?
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