OUR EXPERT
Sean Conway is a former IT security specialist from a national telecommunication company who implements Pi-based projects to get his muchneeded technology fix after retiring.
H ave you ever seen something and thought, “I can do that”? This writer’s inspiration came after using a commercial device to determine the speed of a model train. The speed limit posted for a real train entering a siding is 16kph. So let’s use a Raspberry Pi, with some external infrared (IR) sensors mounted to a block of wood of known dimensions, to establish the scale speed of a model train entering the siding on a model railway layout.
Typical full-size trains
