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About the Model Railroad

RTAC Software


The Randall Museum in San Francisco hosts a large HO-scale model model railroad. Created by the Golden Gate Model Railroad Club starting in 1961, the layout was donated to the Museum in 2015. Since then I have started automatizing trains running on the layout. I am also the model railroad maintainer. This blog describes various updates on the Randall project and I maintain a separate blog for all my electronics not directly related to Randall.

2021-12-16 - Randall Layout Git Repositories on Bitbucket

Category Randall

I keep all the source code and configuration files related to the automation in git repositories on Bitbucket. At first I was using my private workspace, and I finally moved the various projects into a proper dedicated workspace:

This now contains three repositories:

  • automation: The main repository that holds the various projects used for the train automation of the railroad exhibit. Most notably it contains the sources for the Conductor software that drives the automation, the RTAC program that runs on the Android display tablets, and a few other Arduino/Pic16f projects.
  • train-motion: The software that runs on the Vision computer at the museum, playing recorded videos, and also playing live feeds from cameras located around the layout.
  • documentation: This one is totally new. I moved here all the public documentation I have for the Randall Museum Model Railroad.

The documentation repository contains files for layout maps, layout schemas, layout labels, and all the documentation I wrote for the museum staff and the Saturday Operators. I do have links to that in the introduction page however all the source material was just on my own drive. Now it’s properly archived as it should with proper revisions. One goal of having a public repository is to have volunteers submitted patches to extend it. For that purpose I’ve clarified in the README the license and the file formats that can apply here.

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