A tech model railroad club is a group of people who like to use technology to build and operate model railroads. Model railroads are small-scale replicas of real-life railway systems. They use electricity to power the model trains and features like buildings, tracks, and landscapes. Members of a tech model railroad club use technology like computers and electronics to control the model trains and make them go in different directions. They also use things like sensors and lights to create special effects and make their model railroads look realistic.