Hey guys first off I think this is really cool that you spend some of your time to help out rookies like myself...
What I am trying to do is monitor the fuel level in my truck. I would like to build a simple circuit that will turn on a fuel pump in an auxiliary fuel tank to fill up the primary tank and shut off the aux fuel pump when the primary tank is full. Most vehicle sending units are simple variable resistors that change a voltage or resistance to ground. I am struggling with the specific components to make this work. maybe a voltage comparator that energized a relay at an adjustable value and released it at another adjustable value? but the circuit would have to be powered separately by the vehicles 12vdc
Any ideas?
What I am trying to do is monitor the fuel level in my truck. I would like to build a simple circuit that will turn on a fuel pump in an auxiliary fuel tank to fill up the primary tank and shut off the aux fuel pump when the primary tank is full. Most vehicle sending units are simple variable resistors that change a voltage or resistance to ground. I am struggling with the specific components to make this work. maybe a voltage comparator that energized a relay at an adjustable value and released it at another adjustable value? but the circuit would have to be powered separately by the vehicles 12vdc
Any ideas?