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'[EE:] RFID reader module?'
2003\10\22@154438 by Harold Hallikainen

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Anyone have experience with any RFID reader modules? I'm looking for one for a PIC project.

THANKS!

Harold


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2003\10\22@163336 by Madhu Annapragada

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TI RFID group is very reliable; although make sure and cut the read ranges
they put in their data sheets down by 25% to get an approximate in-the-field
range. Other than that, rfid.org will give you loads of manufacturers. If I
may ask, what is the application?
Madhu

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2003\10\22@174236 by Josh Koffman

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May I email you offlist about something unrelated Harold?

Thanks,

Josh Koffman
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Harold Hallikainen wrote:
<snip>

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2003\10\22@220116 by Bill Couture

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On Wed, 22 Oct 2003, Madhu Annapragada wrote:

> TI RFID group is very reliable; although make sure and cut the read ranges
> they put in their data sheets down by 25% to get an approximate in-the-field
> range. Other than that, rfid.org will give you loads of manufacturers. If I
> may ask, what is the application?
> Madhu

The company I work for makes a RFID tag reader, based on the TI ASIC and
a PIC.

While the TI RFID group may be reliable, their documentation *IS NOT*.
We had to get internal documentation because the normal documentation
was wrong, or did not document what was actually needed.  Plus lots of
experimentation.

And throw away any chips before Rev 3.  (The magic needed to make them
work just isn't worth it...)

Bill

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2003\10\23@124415 by M. Adam Davis

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On a related note, I want a RFID system that could copy the RFID
information from nearby cars, keychains, wallets and emulate it on
command for free parking, toll booths, gas, and credit card information...

It amazes me how little protection is built into current RFID
implementations these days.  The people implementing these systems
assume that security through obscurity (knowledge that is not
widespread) is enough, and many of these tags are /only/ 64 bit or
larger numbers - no command/response, no encryption, no authorization.
Beam a radio wave at it and it yields its secrets...

The problem is that RFID is a good system, but current implementations
are bad.  Once they become widely cracked people will associate RFID
with insecurity, and throw it all away.  Of course, companies will come
up with trademarked names for their particular systems, and
dissassociate the name from RFID, but the damage will have been done by
then.

-Adam

Marcelo Puhl wrote:

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2003\10\24@093812 by DAVE L

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part 1 769 bytes content-type:text/plain; x-avg-checked=avg-ok-6F315741; charset=us-ascii; format=flowed (unknown type 8bit not decoded)

Definitely powered, I' ve already replaced mine -dead and no, they didn't let
me keep it for dissection (sad face)
D
At 07:49 PM 10/23/03 -0500, michael brown wrote:
>Josh Koffman wrote:
> > There definately is such a thing. I don't know anything about it, but
> > look for information on how the automatic transponders for toll roads
> > work. My guess is a higher power energizing beam, and a directional
> > antenna.
>
>The ones here houston use a battery powered transmitter that responds to
>the toll booth signal.
snip

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