You’ll also see how this DIY motor powers various Lego contraptions. Finally, we’ll connect it to a power supply and push it to its limits to explore how it performs under maximum load.

The Kinect sits atop a platform made from LEGO pieces. This platform rides up and down an extruded aluminum rail, powered by an old windshield wiper motor ... been several DIY 3D Scanners featured ...

He created an excellent centrifugal pump out of 100% LEGO. While mostly a curiosity, you can definitely get a sense of how the mechanics work. A Power Functions motor turns a 6×6 round plate ...