Xenotime, Librarian of Æther 
Any electronics people know a simple/cheap circuit to precisely measure current but have the measured side be dc isolated (it’s biased at 30V)?
my naïve thought is to just have a good shunt into a like difference circuit with an op amp and resistors and then an ADC can read that
is there a better way to do this?
edit (clarification): some folks picked up on this but I need to measure pretty small currents (<100uA) sensitively so magnetic sensors probably are out. thanks for all the ideas!
my naïve thought is to just have a good shunt into a like difference circuit with an op amp and resistors and then an ADC can read that
is there a better way to do this?
edit (clarification): some folks picked up on this but I need to measure pretty small currents (<100uA) sensitively so magnetic sensors probably are out. thanks for all the ideas!
vxo