I built it for the by Arduino automated Lego train container terminal that I’m currently building. This Lego compressor contains 4 Lego PF M motors, 8 Lego pneumatic pumps and 10 air tanks.

This Lego decoupler can be further improved with an Arduino, a few ultrasonic sensors, and an IR detector to make a fully automatic decoupling siding for a Lego train layout.

Adding a Real Screen to a Lego Train Station After seeing the Ladyada Workshop built in Lego, Dan Malec came up with another way to get Adafruit and Lego to play together.

The train chugs around the track until it reaches a station (a relay turns the power off when a train approaches), where an Arduino board interfaces with the USB key via a very complex piece of ...