Here is the line sensor for our fire bot. It is basically an IR led and a receiver. The LED would shine onto a surface and the receiver would calculate the amount of light that bounced back. Sounds pretty simple and it certainly is. Even though the one I made didn't really work for some odd reason, Ashuai quickly made another one just in time to get checked off. This sensor is to be mounted onto the front of the robot, telling the robot that it has passed a line (E-tape). This can be quite useful when it comes to localization. Too bad mine was messed up, otherwise, having two line sensors would be pretty useful...I think.
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