I am new in this site, and like you can see I want to do a line follower, not a clumsy and slow line follower, but a fast and "fancy". I investigated about the PID method, but can someone explain me in simple words what is it. Thanks for your answers.

  • 1
    Have you already chosen/built the robot? what kind of hardware do you want to use? BTW, I suspect that PID will only be useful if you have a continuous/fluid way to sense the line and not just 3 infrared sensors like many basic line follow bots have.
    – BrettAM
    Jul 1, 2015 at 0:49
  • The chasis... I have not make it yet, and i have 8 sensors in an array.
    – Ionel Pop
    Jul 1, 2015 at 0:57
  • This might be a good tutorial for you to look at: letsmakerobots.com/node/39972
    – Kolban
    Jul 1, 2015 at 1:17

1 Answer 1


Did you check wikipedia, for example?

I doubt it is possible to describe a PID controller in simpler words than those used by the article.

The pseudocode is quite simple and should be also very good for understanding the concept, when applied to a digital system.

See also the limitations of PID controllers.


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