Sorry I meant 24V PSU to the valve, the arduino would be powered with 5V which is seperate.
The voltage divider is what I'm wondering about now, if the signal going back into the arduino is 4-20mA then is a voltage divider required?
Sorry I meant 24V PSU to the valve, the arduino would be powered with 5V which is seperate.
The voltage divider is what I'm wondering about now, if the signal going back into the arduino is 4-20mA then is a voltage divider required?