Resistor tolerance for shunt current measuring

Other Hardware General Electronics
3

The shunt resistor rating depends more upon the circuit that you are using for measuring voltage across the shunt resistor.

Obviously precision and accuracy count, so do I assume a 0.1, 0.5 or 1% resistor being used here?

Does your measurement system measure accurately at 30mV?

That leads to the next question, so far we are in concept stage and exact measurement system has not been determined. Here

  1. Range = (0V to 12V, 0A to 3A)
  2. Arduino processing and driven LCD to display current value
  3. Shunt monitor to measure and feed to Arduino, probably from TI

Thanks, BTFdev