Here are the links mentioned in the presentation

Arduino main site

http://www.arduino.cc

Adafruit, vender of Arduino compatible hardware

http://www.adafruit.com

Link to video of RR crossing powered by Arduino

Crossing video

A good series of YouTube Arduino videos.

https://youtube.com/playlist?list=PLZHhGaUUFqq31OZZLV8HxSc7hY08JCBzu

My club links

https://www.texasnorthern.org/

http://www.springcreekrailroad.com/index.html

http://www.dfwtrainshows.com/

Note that Texas Northern has a N Scale and HO scale layouts.

The train show has all scales, from Z to G, including several modular N Scale layouts that set up for each chow.

Feel free to ask for more sketches and answers to questions.

Thomas Stephens

DeSoto, TX