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Circuit to detect a black line

  1. Oct 31, 2008 #1
    Hey, I need to build a circuit that needs to detect a black line. And I need some help, if someone could please tell me what components I should look into rather than already designed circuits that would be a huge help ! Thanks in advance.
  2. jcsd
  3. Oct 31, 2008 #2


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  4. Oct 31, 2008 #3
    I think people would get a better response if they explained a bit more.

    Black line where? How thick? How long? Against what backgound? Straight? For exactly what purpose?
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