I am trying to measure the current through a precision 1 ohm resistor.
To do this, I have an INA126's (TI instrumentation amp) inputs connected across the resistor.
I am feeding the output of the amp into the analog input pin of a microcontroller.
I know nothing about the circuit I'm measuring, and I don't know if I can connect the "negative side" of the 1ohm resistor to the same ground as the in amp or the microcontroller.
I am pretty sure the in amp won't be able to measure a floating voltage like that, right?
If not, how can I do this?
Thank you!
To do this, I have an INA126's (TI instrumentation amp) inputs connected across the resistor.
I am feeding the output of the amp into the analog input pin of a microcontroller.
I know nothing about the circuit I'm measuring, and I don't know if I can connect the "negative side" of the 1ohm resistor to the same ground as the in amp or the microcontroller.
I am pretty sure the in amp won't be able to measure a floating voltage like that, right?
If not, how can I do this?
Thank you!