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I've built a 3-track traverser table that is driven by a custom Arduino program that drives a linear actuator and is controlled via a Nextion touchscreen panel.
Link to a video demonstrating it in action:
Link to a video describing the construction:
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ModelRailroadBookstore.com - An online model railroad bookstore featuring a curated selection of new and used books. Layout design, track plans, scenery and structure building, wiring, DCC, Tinplate, Toy Trains, Price Guides and more.