Arduino for Lego Trains #9: Automatic Decoupler

Seperate your wagons from your locomotive using this awesome Arduino-powered decoupler! Using a single motor and some infra-red sensors, this clever construction of gears, axles and plates can block one side of the track, preventing individual rolling stock from moving forward. From there, just power your train forward to uncouple your wagons! This tutorial incorporates the decoupler into a siding, allowing you to uncouple wagons, switch points, then retrieve other wagons before continuing on your journ