I have to measure potentiometer sensor value in a noisy environment (car). The sensor is about 3 meters from my main processor board, my idea was to simply use this sensor as voltage divider and read on the Analog input of microcontroler the value.
My main problem (perhaps not !) is to send my clean 3.3 V on the potentiometer, I am afraid to get ESD/EMI or whatever on the 3.3 V lines along the wire and get back to my card where microcontroler and other sensitive component are.
So how could I isolate the 3.3 V? Can any DC/DC converter do the job ?