I am making a custom hydraulic brake for my sim racing setup. The original brake uses a potentiometer which outputs 3.3V at no brake pressure and 0V at full brake pressure. My pressure transducer, when supplied with the same supply as the pot, outputs around 0.35V at no brake pressure and around 3V at full brake pressure. For reference, when supplied 5V, it outputs .5-4.5V.
I have setup this diff amp circuit and was able to reverse the output of the pedal.
But I am now struggling to figure out how to shift it to hit 0V and start at 3.3V. How do I "exactly" calculate the resistors to achieve that function?
I have already considered an Arduino, but I would really like this to stay as simple as possible as far as hardware goes for resale considerations. An Arduino makes this much more difficult from that perspective.