This LEGO Street Sweeper drives around and avoids obstacles while sweeping your floor (well it tries to anyway). It is a rear-wheel drive and rear wheel steering vehicle. The drive and steering motors are Power Functions, and the NXT controls the motors via a Mindsensors NRLink. The Mindsensors SumoEyes detects obstacles in front of the sweeper.
After a long break I’m back with a new project. This autonomous street sweeper was inspired by the type we have driving around here in Ireland. It started as a simple project to build a 3-wheeler trike using a turntable, and like most LEGO it morphed into something else entirely.