For a project I want to measure the magnetic fields that are made when there goes current through a wire.
I want to do this the same way as a current probe (with a magnetic core, a hall sensor, and a second winding (closed loop current sensor)) since I want to measure around 10 mG / 0.001 mT (so with small currents in the mA/µA). The problem I have is that I can only find these modules with one output pin from the internal op amp that outputs to the second winding. I think I need more than that to get the magnetic field values (maybe the output from the hall sensor and input for the reference one).
As mentioned before, I need more in/outputs for my application.
Schematic I have in mind:
The in and outputs will go to a microprocessor(http://www.kynix.com/Product/Cate/229.html) (with build in ADC) so i can set the reference voltage the same as the hall sensor and get both outputs.
Is there a way of solving this problem (are there sensors with more outputs / can I make my own sensor that is accurate / should I look at something else)?