club layout, I just finished a book called Arduino Model Railroad Animation. It covers using servos to operate semaphores, water tank, cranes and other trackside accessories. This is a good practical guide to electro-mechanical automation using an Arduino as the brain. The authors (Paul and David Bradt) have a few other Arduino books as well that are equally good. We are working on a project using servos to actuate turnouts and microswitches.
Arduino Model Railroad Animation
Arduino Model Railroad Signals
Arduino Force, Pressure, Friction and Acceleration Science Fair Projects
Arduino Heat Transfer Science Fair Projects