this is my first line follwing bot.I have not do complex track tests.the video show three behaviors : black line follwing,stop at line end,obstacles quiet.
the gear motor should be driven by l239d chip.but i have not l239d by hand now.i use mini realy.the relay control is no perfect,its show a kind of integral behavior.sorry my bad english.i can not talk more.
Thank you for posting about your robot. Very interesting. I like to use of lids for the wheels.
As far as translation, I think we can all use Google Translate. It is how I am writing to you in Chinese. Not sure how good it is, but it is much better than my Chinese ability.