RFID - tag detection, don't need ID

[BOOT]

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!

 

[Ian Stirling]

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.

What's wrong with anti-theft tags?

 

[BOOT]

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!

 

[BOOT]

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!

 

[Ian Stirling]

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.

Hidden camera + motion detector to activate tape.

 

[Andrey]

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

 

[reboot]

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?

 

[Ian Stirling]

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

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.