Medium-range proximity sensor, aka, super Hall Effect sensor
I need a sensor to use with an Arduino. I've been thinking and researching for months, but I still haven't been able to come up with something feasible and good.
Basically, I want a sensor that can measure its distance to a specific object.
Id est, object A knows it's distance to object B; not to any other object, like the surrounding environment, ONLY the distance to object B.
The sensor should be able to measure the space around it, ie, the sensor measures distance not linearly - like an IR sensor or an ultra-sonic sensor - but spherically.
I think Hall Effect sensors can do that.
The problem is: I want distances ranging from 10cm - 1m (4 - 40 inches) and a Hall Effect sensor can't do that, right?
And very strong magnets and Arduinos don't really go well together...
So.. what can I use to do this?
Thanks a lot! :)