This 'ible leans heavily on instructions given in my previous 'ible
on building a pannable vision system. As such, it's a little less step-by-step and more a photographic tutorial on the concepts involved.
The position sensor feedback circuit used in this steering mechanism is the same as that used in the previous 'ible, a simple potentiometer.
This is the steering rig I build for my ATRT (All Terrain Robotic Trike) vehicle. You can see that in action here
, if you like. The panning vision system that I covered recently was built later, to be an add-on module for the ATRT, so covering this subsytem now is kind of back-tracking for me.
I think this system could be adapted to other large 3-or-4 wheeled remote control vehicles or robots. Adding a suspension system or all-wheel-drive would probably complicate the system of tie rods needed, but it could still be done.