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Finding the Correct RFID reader?

Discussion in 'Radio and Wireless' started by lukegray, Jan 15, 2012.

  1. lukegray

    lukegray

    1
    0
    Jan 15, 2012
    Hi All,

    I am a design student in my final year working on an electronics project, but currently having some difficulties finding the appropriate hardware and was wondering if anyone could help?

    I would like to use a PIC to control an RFID reader. This reader needs to grab information from RFID tags that will be placed upon someones body when they walk through a door way.

    So the reader needs to be able to read multiple tags up to 3ft away and be able to talk to a PIC (Possibly 16F819).

    Firstly, I currently can't find any available RFID readers with these specs (If anyone can that would be great) so I was thinking about creating my own? How difficult would this be to create one of the spec I require?

    Secondly, I believe there could be problems reading multiple tags if they are on a persons body at different angles and positions? Would I need to use multiple readers?

    Thanks in advance for any help.

    Luke
     
  2. OLIVE2222

    OLIVE2222

    690
    25
    Oct 2, 2011
    Hi Luke,

    Welcome to this forum!

    They are many frequencies (and protocols) used for RFID purpose.
    You can grab many information's one the web, here about the frequencies:

    http://www.rfid-handbook.de/rfid/frequencies.html

    And the protocols:
    http://www.rfid-handbook.de/rfid/standardization.html

    For 3 ft range you need UHF type, many tags can be readed simultaneously by using an inventory command, no need for multiple readers. Many readers can be RS232 connected, easy to handle with a PIC so. Doing such reader yourself don't seems realistic.

    I suggest you to look around for UHF readers (and antenna's) you can buy or borrow.

    Olivier
     
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