Vibration sensor (how to choose the right one)

Discussion in 'General Electronics Chat' started by shezza, Aug 7, 2014.

  1. shezza

    Thread Starter Member

    Mar 19, 2014
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    Hi,

    I have purchased a light bar for my brother. He wants it on his door to let people know if they are knocking as he tends to lock his door. Only problem was, the vibration sensor was too sensitive. So Ive been searching for information on these sensors and how to find a less sensitive one and have come up with nothing... Wondering if someone could maybe point me in the right direction?

    The sensor it came with was a SW-200D.

    Thanks
     
  2. sirch2

    Well-Known Member

    Jan 21, 2013
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    A microphone?
     
  3. Alec_t

    AAC Fanatic!

    Sep 17, 2013
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    The SW-200D is a tilt switch. Try re-orienting it. At a different angle it may have the response you need.
     
  4. shezza

    Thread Starter Member

    Mar 19, 2014
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    0
    You mean a microphone sensor?

    I did try, didnt get anywhere. I did find the same type of item (what do you call bits that you soldier to a circuit board, is there a general name?) SW-18020P and also a SW-520D. Any idea on how they differ?
    Is there any other kind of "item" (device?) that could suit this application?
     
  5. Alec_t

    AAC Fanatic!

    Sep 17, 2013
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    Components. Though you wouldn't need a soldier :).
    A bell-push?
     
    shezza likes this.
  6. shezza

    Thread Starter Member

    Mar 19, 2014
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    Yes yes, components is the word I was looking for :p

    I guess the push-bell is a reasonable way to go. Would have been cooler if it worked on sensing a knock, but Ill settle :p

    Thanks
     
  7. sirch2

    Well-Known Member

    Jan 21, 2013
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    My thought was to attach a small microphone to the back of the door to detect someone knocking - you would need an amp and some other circuit (e.g. schmitt trigger) to turn this into an "on/off" signal
     
  8. shezza

    Thread Starter Member

    Mar 19, 2014
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    Oh, that could work... but far too sophisticated. Thanks anyway :)
     
  9. djsfantasi

    AAC Fanatic!

    Apr 11, 2010
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