LEGO trains are fun to play with, but as with any model train, you so seldom have enough track to fulfill your greatest desires. YouTuber [brick_on_the_tracks] has come up with some creative ideas ...

A big wheel driven by a stepper motor slides the data card under the readout circuit along a short stretch of LEGO train tracks. The optical sensors are read out by an MSP430 series ...

With a suspension system to handle uneven tracks and magnetic rail switches for smooth transitions, the train operates with precision. Each wheel is powered by compact Lego L motors, while ...