My first original robot built using LEGO Mindstorms. It uses only two of the NXT Motors for motion and an ultrasonic sensor to detect objects in its way. I built many prototypes of this robot before I could get it to support its own weight plus that of the heavy computer brick on top. I wrote a simple program for this robot making it walk forward until it sees and obstacle at which point it should turn and carry on exploring, this way it is fully autonomous.
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