Low DC Current (~ 1.2 A) SPDT for Arduino
So I would like to use a resistor with a low ohmic value to measure voltage drop across it and estimate current draw.


Here you go.


  The INA250 is a voltage-output, current-sensing amplifier family that integrates an internal shunt resistor to enable high-accuracy current measurements at common-mode voltages that can vary from 0 V to 36 V, independent of the supply voltage. The device is a bidirectional, low- or high-side current-shunt monitor that allows an external reference to be used to measure current flowing in both directions through the internal current-sensing resistor sensor.