Raspberry Pi and robotics are no strangers to each other, and Dexter Industries has managed to incorporate the board into a unique and modular LEGO-based robot. The company's add-on board connects to the Pi, provides ports for four LEGO Mindstorm NXT motors, five analog and/or digital sensors, and provides power (through a 9V power adapter) to both the Pi as well as the BrickPi, eliminating the need for a constant connection tethering the robot to a wall.