The gauge failure posts cursed my car

Does a 50% duty cycle = 5v? I don't know how "all that" works out.
No it's simple, but it depends on "are you" going to use 12.6 or 14V? It is simply "half" the voltage. But I don't remember if or when or how that was determined..........did Chrysler every SAY it was 50 or was that just a passing comment? Regardless though, a 1V change at only 5-6V is a lot of change