The battery pack is mounted on a fold-out frame on the side of the rover. Two medium Power Function motors have plenty of torque to drive the rover – it is surprising lightweight and sturdy. The LEGO NXT controls the motors via the Mindsensors NRLink interface. For simplicity I do not have any cables attached in the pictures shown below.
Queboid drives around and avoids obstacles – not rocket science to program but fun to watch. You can download the queboid3.nxc NXC source file.
• View step-by-step building instructions as a ZIP file (14.5 MB download)
• View a gallery of images with step-by-step instructions.
You can watch a short video of Queboid driving in my kitchen. It sounds like a machine gun firing!