An Arduino with a motor shield drives the train around the loop. A reed sensor below a section of track provides feedback on where the locomotive is in the circuit.

Posted in Arduino Hacks, classic hacks Tagged arduino, model trains, reed switch, semaphore ← Hackaday Links: Leap Day, 2012 Wardriving For Zigbee → ...

An interest in trains is not a prerequisite but a desire to create something of your own and carve out a little corner of quiet in a noisy world certainly helps.