Hello,


I have this circuit and cannot figure out what the problem is with it. I have two circuits, one which is working correctly and one that has one and only one fault. I've took measurements from various test points around the circuit and the only measurement that didn't match my expected was the output from the comparator and resistor. On the working circuit I measured -11.963v and on the faulty one I get -12.063v which is only 100mV out. What could be causing this? The resistor which is on the output of the comparator is also giving me an incorrect voltage of 10.991v and should be 9.924v. Can anyone help me to try and figure out what the problem may be?

Here is a picture of the circuit:

 

Never mind I found it the fault. If a mod could delete the thread that would be great.

Thanks

 

Threads can't be deleted . Why don't you report the fault and how you found it instead?