The circuit i am working on read two voltage values, the first one comes from 12volt battery thru 5k and 10k voltage divider (analogue input 1), the second is read off a sense resistor (analogue input 2).
The voltage through voltage divider is read fine until the voltage across sense resistor appears then the voltage on the voltage divider analogue input appears to drop 1 Volt from 12.80 to 11.80 with no change shown in the meter which i used to measure externally !! I have been struggling with this and still cant find a solution.
you can see in the picture attached.