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Help please about motion sensor

  1. Dec 8, 2008 #1
  2. jcsd
  3. Dec 8, 2008 #2
    means pull up resistor?
     
  4. Dec 8, 2008 #3

    dlgoff

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    Science Advisor
    Gold Member

    Yes, it means a pull up resistor. It's connected to the unused wire to keep it at a high state.
     
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