Check out this amazing Lego Wall-E trash collecting robot from NXT Mindstorms hacker, BlueToothWiki.
This cool Lego Wall-E robot uses an ultrasonic sensor, it spots the trash and then verifies that it is trash, it then opens up and scoops the rubbish away, here’s a video of it in action.
This is a pretty awesome Lego Wall_E robot, if you are interested in making your own, full instructions can be found on the Lego NXT site and BlueToothWiki’s website.
via Hackszine.