Participated in an IEEE Hackathon where we built a line following robot. We were the slowest, but we had the most accuracy.

The image is our first attempt at getting it to work, consequently, we were the first team to actually get a prototype finished and working. Other people were trying to cram as many sensors as possible. We stuck with one, and 47 lines of code to make it work. Everyone else had more than 2 sensors and I can only imagine how much code they had.