I am doing one arduino base project in which I have to read 4-20 mA signal from two different potentiometers which is power from 24 vdc supply, compare them and send a signal to 2 channels relay board. If first signal from potentiometer is greater by 0.16 mA or more than second then 1st realy will energize if second signal from potentiometer is greater than first signal by 0.16 mA or more then second relay will energize.
Now I am facing issue to read 4-20 mA on arduino without any external module. I don't know issue is in coding or circuit. Can you help me