I have a piece of tech that uses somewhere between 50-200mA, and I want to continuously measure the current used. To this end I have found this:
I've hooked up the supply voltage to an arduino 5V and the GND to the corresponding GND on the arduino. The reason I've chosen to use my Arduino for the supply is that it gives a stable 5V all the time. I've connected both of the IP+ channels to each other and the two IP- channels together aswell. After this i connected it to my unit like this:
[12V PWR 1A]+ --> [[IP+]CIRCUIT[IP-]] --> [+[The piece of hardware I want to measure]-] -->[GND]
I have to set Vref on the board when the thing is disconnected by measuring the voltage over V0 and GND and turning the Vref until it says 0V. But then what? What do i do next?