line tracker robot

im looking to make a line tracking robot.

but i dont know what to use for the line follower part, is it an IR detector, or photodiode? im not so sure.

i also need to know what to make the chassis out of, and what to use for the wheels, and also the motors.

i would much appreciate it if you just gave me a list of parts for the robot.

thanks for your help.

Krumlink is right, that book is all about a line tracking robot and it goes into every detail you could possibly want to know. Building the body, the tools, the circuitry and where to buy the stuff.