There are many ways to use an Arduino on a model railroad. These tiny, inexpensive, programmable computers can perform functions such as controlling signals, routing turnouts, and running animations.

The project is at an early stage – thus far, laying out how to set up an Arduino Uno using a potentiometer to control the speed of a stepper motor, which rotates the turntable.

In the December 2016 Model Railroader, Detlef Kurpanek describes how designed an operating model railroad signal system that uses Arduino microcontrollers. As an online bonus, you can download ...