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Quick Question

CharminXtraCharminXtra Posts: 3
edited 2009-05-06 23:16 in General Discussion
All I want to do is have a voltage going out of the RFID reader after an RFID tag comes within range. Can anyone just explain real quick how I would do that before I buy one of these. Thanks.

Comments

  • FranklinFranklin Posts: 4,747
    edited 2009-05-06 02:16
    You won't, it does not work that way. Now you could add some parts and get it to recognize the serial stream and send a voltage but you would have to design that part.

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    - Stephen
  • sam_sam_samsam_sam_sam Posts: 2,286
    edited 2009-05-06 02:17
    CharminXtra

    Welcome to the forum

    That being said

    You can not use the card reader as a stand lone device

    you have to a micro-controller with


    All I want to do is have a voltage going out of the RFID reader after an RFID tag comes within range.

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    ··Thanks for any·idea.gif·that you may have and all of your time finding them

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    Sam
  • SRLMSRLM Posts: 5,045
    edited 2009-05-06 02:20
    You might be able to use a gated D latch to catch when it's high (AKA, outputting data). From there, though, the output would stay high until you set both the D and WE lines low. Note that this solution would probably require quite a bit of effort on your part.
  • CharminXtraCharminXtra Posts: 3
    edited 2009-05-06 02:51
    So if I understand this correctly could I use the pulse from the data stream to trigger a 555 timer?
  • Mike GreenMike Green Posts: 23,101
    edited 2009-05-06 03:27
    Yes
  • CharminXtraCharminXtra Posts: 3
    edited 2009-05-06 03:32
    Ok thanks a lot. So the only downside to this would be that any RFID tag would be able to activate it.
  • kwinnkwinn Posts: 8,697
    edited 2009-05-06 03:35
    Yes.
  • Buck RogersBuck Rogers Posts: 2,190
    edited 2009-05-06 23:16
    sam_sam_sam said...



    Welcome]


    That being said



    You can not use the card reader as a stand lone device



    you have to a micro-controller with





    <FONT color=blue>All I want to do is have a voltage going out of the RFID reader after an RFID tag comes within range.




    Hello!
    This is not exactly correct. There's an article on an older issue Make magazine which shows an individual using the RFID reader, directly connected to a Serial supported LCD display. Both the display and the RFID reader are the exact same ones available here with regards to Parallax.

    Now if you are going to do something with the output data from the RFID reader as well as display it on an LCD screen, then yes I would agree with every one else.

    Incidentally according to the article the author is the fellow behind the development of the device. I suggest visiting the Make magazine site to track down this article.

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    Buck Rogers

    www.gregg.levine.name
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