Here's a double-dose of Lego NXT goodness; a robotic tank and an automatic aquarium heater. The image to the left is a robotic tank powered by the popular Lego Mindstorms NXT kit. The brains rest inside of a tube, including the controller brick, ultrasonic range finder, a gyroscope, and a compass. Two sets of treads surround each edge of the tube making us wonder which end is up? We've embedded … [Read more...]