Hi friends,
I had some experences on building line following robot.
Perhaps, I may help but not much.
If you wanna find documents on line following, pls search on google
with keyword: line following. I know many site bout it, but I cannot
remember. When I need, I search on google because it's a simple project,
thus, there are many documents on it.
Normally, people used to use IR as transceiver to detect white and black
However, I suggest to use visible light. You should try with red LED.
To protect your robot from noises and interferences, there are many way to do
1) You can cover your robot with clothes or black papers.
2) You can use rheostat at receiver LED
3) You can cut a black sheet and a white sheet, then detect it
as reference with a visible light transceiver.
Hide it inside your robot, and use this receiver reading
as reference for other ones.
It's easy to work on black and white floor, but if you try on blue
(or green), red and white floor (3 color floor) you may find that
hiden transceiver should be helpful.
If you need a schemes, and pcb of a finished project, pls email meeh
falleaf@myrealbox.com. I'll ask my friend and send it to you.
However, it may come to you late, because I'm now in finals, and
be crazy with books.. books and books...
Good luck.