This weekend I'm at a public exhibition from my LUG (PLUG) in Lourinhã (Portuguese capital of Dinosaurs and the center of one of the richest fossils areas of the late Jurassic age, in the entire world). Nevertheless managed to get a bit of time for a fast post, so the weekly TechVideo won't be missed... ;)
This video is certainly already widely known, but still one of my favorite concept implementations with NXT. A Self Parking Car (SPC) from cesky79, made with an unique ultrasonic sensor which rotates 360º.
This is and evolution of the same author, first SPC (see below). According to his description, thanks to the rotating ultrasonic sensor the car can park both sides, left or right, and uses it to avoid hitting cars when it parks. Although with two ultrasonic sensors the parking system would be easier and the car design would become nicer.