Line follower robot

first study about the sensor there are various sensor are available like IRbased ,LDR based. than study about motor diver circuit, than control circuit. the control circuit can be designed by logic gate or microcontroller. so follow th step and ask the problem wht u faced.

here is a line follower robot that i made in my semester project along with the C code

http://techiworld4u.blogspot.com/2011/12/line-follower-robot.html

for undersading basic line following algorithm

follow the link

http://homemaderobo.blogspot.in/2012/03/propellerrotating-led-display.html

Hi,

Simple Line Follwing Robot using Transistors. No need of Microcontroller & programming. 

http://www.elektronobi.com/eng/robot/line_follow_robot.html

Thank You !!!