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light following robots

its like one of the first things any kid lucky enough to take a robotics class learns is how to make a robot that either turns towards or follows a light source

the funny thing is the are no instructables that i could find for making light following robots

if i'm correct the robot contest is still going i would defiantly vote for some one who makes a light following robot (especially if its 555timer powered http://blog.makezine.com/archive/2008/03/a_555_timer_based_lights.html)

CameronSS8 years ago
i've tried to make one but it is not going straight... any help?