I am new to electronics so I apologize in advance for incorrect terminology.
I have an existing circuit which can be powered with either 13.4v or 14.4v. What I would like to do is treat that voltage difference as a binary switch, where the 13.4v power is OFF and the 14.4v power is ON.
So basically I want to build a circuit that can have an input voltage of 13.4v or 14.4v which would equate to an output of 0v or 14.4v respectively.
I have found and looked into MOSFET transistors as they seem to be the most reasonable way to achieve this but I can't find one that has a gate-source threshold voltage high enough. As in, I can find a 14v Vgs MOSFET but the Vgsth is always too low, usually 6,7 volts. I need the OFF output voltage to be 0v. This is leading me to think this might not be the correct approach.
EDIT: I also want to include that the maximum current draw on the circuit could reach 8 amps but on average should be closer to .5/1 amps.
Can I achieve the circuit I described above with just one MOSFET? Or is what I'm even trying to do reasonable/possible?
Thanks for your time.