Connect with us

RFID - tag detection, don't need ID

Discussion in 'Electronic Design' started by BOOT, Oct 10, 2004.

Scroll to continue with content
  1. BOOT

    BOOT Guest

    Maybe there is another way to do this.

    I am looking to build something that will detect the presence of a small tag
    (RFID?) when it passes within 5ft.

    I don't need an ID, I just want to detect the presence of such.

    Perhaps there is another way to do this which does not involve RFID.

    What I am trying to do is detect the removal of something (say clothing
    item) from a room that I can place a small/unoticeable tag or such inside.


    Thanks for any help!
     
  2. Ian Stirling

    Ian Stirling Guest

    What's wrong with anti-theft tags?
     
  3. BOOT

    BOOT Guest

    I am ignorant of the technology and suspect that what I am after is
    something simpler (earlier technology?) The simplest anti theft tag I have
    ever seen looks like a wire strip. Is this indeed considered an RFID? I
    guess I need some more google time. If it's not an RFID, are the square
    stickers with copper traces RFIDs? How about the small rectangular package
    like stickers? I am thinking that RFID implies the ability to uniquely
    identify a large variety of items and that there is actually machine
    readable code invovled.

    This may sound funny/way over the top but I am trying to come up with a way
    to catch a laundry room thief stealing from a shared launtry facility. I
    figure if there was something small I could plant inside a clothing item and
    hide a detector near the exit that would alert me. If it cost me $150 it
    would be worth it LOL.

    Any ideas appreciated!
     
  4. BOOT

    BOOT Guest

    After further reading it is and EAS device, either AM(Acousto-Magnetic),
    EM(electro-magnetic), and RF(Radio-Frequency) I should be looking at
    probably?

    So any suggestions of an easy to put together solution?

    Thanks!
     
  5. Ian Stirling

    Ian Stirling Guest

    Hidden camera + motion detector to activate tape.
     
  6. Andrey

    Andrey Guest

    Some libraries still use permaloy strips or more complex arrangements of
    dissimilar metals. These things can be magnetized and de-magnetized. Making
    such a tug will be simple. You will need a reader though - this will be
    trickier

    Andrey
     
  7. reboot

    reboot Guest

    Thanks guys.... the camera+recorder is impractical due to cost and having to
    hide it etc...


    Andrey I am interested in that suggestion. Where would I start with this?
     
  8. Ian Stirling

    Ian Stirling Guest

    If you want to go low cost, there are a number of low-end cameras,
    with a "spycam" mode, that can take a picture every 10s for a few days.
     
Ask a Question
Want to reply to this thread or ask your own question?
You'll need to choose a username for the site, which only take a couple of moments (here). After that, you can post your question and our members will help you out.
Electronics Point Logo
Continue to site
Quote of the day

-