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i am thinking that is it possible that i build a bluetooth position system. the concept is from the GPS system but this is apply to a small area like a university campus or a town.. i was thinking that the bluetooth might be more accurate because it is short range if compare to the wi-fi..
regarding to the question of moroh, to differ the black line follower and white line follower, the difference is just the programming of the IC, depend on how your program your input of the PIC..if, white line is 0v and black line is 5v, then you set a voltage reference to differ the 2 state..
ya, it working well, anyone who want the detail for the project can send a personal message to me.. this 2 video is the robot from my friend, my 1 is not upload yet...