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Chapter 14: Classic Projects > Following a Line

Following a Line

The line-following theme is often mentioned in this book, as we think it is a very useful indicator of how different techniques can improve the behavior of a robot. The time has come to give it an official place, and face the topic in its entirety. Let’s review what we have already said about line following:

image You must actually follow the edge between the tape and the floor, reading an average value between dark and bright, so that when you read too dark or too bright you know which direction to turn to find the route back.

image If you want to keep your software and robot as general as possible, you should use some kind of self-calibration process before the actual following begins. Calibration consists of taking readings of light and dark areas on the pad before actually starting line following. This lets your robot adjust its parameters to the actual lighting conditions at the time it runs; these conditions are almost certainly different from those for which your robot was designed.


  

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