Hi, according to the user guide of ADC-16 terminal board, it said to measure a current, i need to connect a shunt resistor, the value of the resistor is R=2.5v/Imax. In my case,if my mp3 player maximum current is around 700mA, so should i use the R=2.5v/0.7A=3.5ohms?
Further more, they said this method can't apply for measureing main current? So can you tell me what does that mean??