I am designing a device to track the diagnostic of a vehicle. A Vehicle has many sensors working @ 12V or 24V.
As per the scenario, Lets consider a 24V sensor which I need to read. The sensor is a resistive sensor. The analog output from the resistive sensor is going to dashboard of a vehicle via cable. What I need to do is to peel the cable covering, attach a second cable there & take the signal to my PCB which will further be given to an ADC.
How will the original analog signal get affected which is going to dashboard?? Do I need to include some circuitry on PCB to make it possible??