What kind of sensor?

Discussion in 'General Electronics Chat' started by picit, Aug 1, 2008.

  1. picit

    Thread Starter New Member

    Dec 14, 2007
    7
    0
    Hello All

    I'm looking for a sensor that can detect a thin black line (about 2mm) on a white background and at a distance of about 1/2 inch away.

    Thank you
     
  2. Audioguru

    New Member

    Dec 20, 2007
    9,411
    896
    Shine an LED down then "see" the black line with a photo-transistor.
    Look in Google for Line Following Robot Circuit.
     
  3. bertus

    Administrator

    Apr 5, 2008
    15,649
    2,348
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