Froggy World 4 The Train

This is a train control mechanism for O scale trains. It is part of the Froggy World amusement park for adventurous frogs.

To stop a train at a precise location, it must be detected and powered down, and the cross arm stops the train where I want it stopped.

Video at: http://youtu.be/44i_BZaU5go

Full instructions at:

http://www.instructables.com/id/Froggy-World-4-The-Train/