Hey guys, sorry if this is in the wrong thread, but I'm confused about a circuit's behavior.
Here is the circuit, on Falstad.
http://tinyurl.com/ubkmuvu
I'm just setting a negative voltage reference by placing ground before the final resistor, so I get -2.5V at that point. I then pass it through a buffer to be able to use it with a load without it affecting my generator circuit.
What I'm so confused about is the current flow: I understand from my 5V source to the -2.5V output there will be current flow...but is that normal? Is that safe? I just am mocking an LCD contrast circuit with the potentiometer, but the current flow in the opposite direction is concerning. I tried a diode at the output of the buffer, but it seemed to then result at -2.5V on the anode and 2.5V on the Cathode, which makes no sense to me either.
Thanks,
Andrew
Here is the circuit, on Falstad.
http://tinyurl.com/ubkmuvu
I'm just setting a negative voltage reference by placing ground before the final resistor, so I get -2.5V at that point. I then pass it through a buffer to be able to use it with a load without it affecting my generator circuit.
What I'm so confused about is the current flow: I understand from my 5V source to the -2.5V output there will be current flow...but is that normal? Is that safe? I just am mocking an LCD contrast circuit with the potentiometer, but the current flow in the opposite direction is concerning. I tried a diode at the output of the buffer, but it seemed to then result at -2.5V on the anode and 2.5V on the Cathode, which makes no sense to me either.
Thanks,
Andrew