Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

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


    User Avatar
    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.
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook