This might be a total noob question but I would like to know how you measure current with the pic. I can see several adc ic's and options that measure voltage but not current. I am starting a data logging project and the source signal is 4 to 20 ma.(Miltronics Water level meter) The difference in voltage at that small current change seems too small to measure? Can I use the ADC on the pic or do I need a special IC current to voltage converter. I have also seen some solutions with an op amp but would prefer an all in one IC.
Thanks
Snap