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This is my first robot, I built it five months ago, but I havan't had the time to smubmit on LMR. It uses an srf05 to avoid objects and two infraed sensors to detect edges. I made the head using perspex and used some Lego parts for the Chassis.
This is a companion discussion topic for the original entry at https://community.robotshop.com/index.php/robots/show/obstacle-and-edge-avoiding-robot