P38A Digital EAS Sensors

To head off the obvious questions:

1 Because I really like the car.
2 Because I saw the Maserati Shed convert a crappy carbon track throttle position sensor to be contactless. Trade secret, but this is my way to do the same thing.
3 To see if I can do it.
4 Maybe to sell as a kit.

The idea here is simple.

Replace all the EAS Sensors with digital encoders feeding into an Arduino(s?) which fakes an analogue voltage in the same range as the analogue ones.

As it would join onto the original wiring it shouldn't impact any other systems. I don't plan to alter mount points for the sensors, so it should be reversible. I'm going to try it on the bench.

I'm an experienced programmer, but sketchy on electronics.

Q1: Can anyone recommend a suitable type of encoder which moves in an arc (as opposed to a full rotation)?

Q2: Is there a simple inline component to drop the voltage from 12v to 5v and vice versa?

Q3: Are the L322 ones digital or analogue?

The modern penchant for making something simple into something complicated with much more to go wrong. If I was going to do away with resistive sensors, I would be looking a piezo.

AFAIK both mine are still on the original sensors, and working fine. At £39 plus VAT each from Island4x4, I will just replace when required !!

With digital sensors & Arduino you would still need to figure out weather & road crap proofing. Besides most digital angle encoders are designed for continuous rotation, not absolute position. How you gonna calibrate heights ??

Look on the Arnott site. They mention "contactless height sensors", so why re-invent the wheel.