carwhisperer
New Member
I want to put an LED in an automotive circuit to "read" the position of a potentiometer that is internal to a 12v motor. The motor, which opens a valve in the climate control heater, has an internal 4.7 kOhm potentiometer which delivers a signal to the climate control ecu. I will no longer be sending that signal to the ecu but rather would like to use it to dim an led or other bulb. I would like it to run on 12v nominal, I would prefer not to have to reduce it to 5v. If I just hook the power supply up to 12v and run the ground through the motor's potentiometer will the led/bulb dim as resistance is increased? A relatively gradual dimming from open to close would be nice but even if it is much more abrupt that will still accomplish what I want.
Brian
Brian