how to design a line following robot

line following robot is basically a bot with will move around following a particular line of some color

we can design it in many ways i.e using 2 motors or 1 motors for driving and other for steering and use of the microcontroller to control it is also left to readers choose

here I came across a good post relating to line follower bot
http://myfirstbot.blogspot.com/2008/07/line-follower.html

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