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Secure Digital Card

Discussion in 'Misc Electronics' started by Jim, Feb 14, 2004.

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  1. Jim

    Jim Guest

    If you see a sd card from the back the ninth pin (from the right) is shorter
    than the others. On the card I've got, this pin (contact) is too short and
    there was (a tiny) available gap for this contact to be extended (from the
    manufacturer).
    Is there any material that I could use to extend this pin just enough to
    make contact with my device (e.g. liquid metal, metal glue ??? I used my
    imagination here !! )
    Thanks Jim.
     
  2. Don Bruder

    Don Bruder Guest

    That pin is probably deliberately short. Without going into the exact
    specs and related material, I'd bet it's the power pin, and it's
    intended to be the last to make contact when inserted, and the first to
    lose contact when removed.

    You see a similar arrangement on USB plugs/sockets - two of the
    connectors are significantly shorter than the others. Those two are the
    power lines. The idea is to connect the data lines first, THEN power.

    It would be my opinion that messing with extending the contact on your
    card would be a bad idea for the health of either the card, or the
    device it goes into.
     
  3. Jim

    Jim Guest

    Hi Don.
    I see the line traces on my sd card contacts (that the pins of my device is
    making onto the sd card), and it would not be a problem as the ninth pin
    (even if I extend it) it would be far from reaching the same level of the
    other contacts.
    The problem is that I may destroy the door that holds the card (and the
    batteries) because I have to add an addition back of the card (a kind of
    sponge) to push the card down to make proper contact.
    Thanks for your response, Jim.


    <http://www.sonic.net/~dakidd/Horses/FlyTrap/index.html>
     
  4. Ian Stirling

    Ian Stirling Guest

    Why do you want to do this?
     
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