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Seeking Pro Help: Replacing Parts on This Card Reader With a Smaller One

Discussion in 'General Electronics Discussion' started by 4freedom, Nov 22, 2014.

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  1. 4freedom

    4freedom

    3
    0
    Nov 21, 2014
    Hey,
    Here is the project idea:

    Make 2 components on this MiniDX3 1/2 there size.
    [​IMG]


    1) Replacing the battery with a smaller:
    9mA 3.7V battery
    http://tinyurl.com/kes7frn


    2) Replacing the reader with a smaller:
    3mm 3 track head
    http://tinyurl.com/plwjx5x



    So I want to know if I can use the connectors or If I should cut the wires and solder the new reader together.
     
  2. Frenoy Osburn

    Frenoy Osburn

    64
    24
    Nov 20, 2014
    I may be missing something here.

    1. For the battery, the 9mA battery does not have a connector included, so you would have to either get one, or simply cut the wires of the old one and re-use the connector. But are you sure that 9mA would be enough for the entire circuit?

    The old battery is a Li-Po, so be careful with the wires, cut one at a time and keep them insulated. It's easy to start a fire with Li-Pos

    2. For the reader, I couldn't see any connectors, it seems to be a PCB mount component. So you would have to replace the one present; assuming both are compatible.
     
  3. Arouse1973

    Arouse1973 Adam

    5,164
    1,087
    Dec 18, 2013
    The battery you linked to is 20 mAh not 9 mAh.
    Adam
     
  4. Frenoy Osburn

    Frenoy Osburn

    64
    24
    Nov 20, 2014
    He linked both. The text 9mA 3.7V battery is itself a link to the 9mA battery.
     
  5. Arouse1973

    Arouse1973 Adam

    5,164
    1,087
    Dec 18, 2013
    Ah missed that one, cheers.
    Adam
     
  6. 4freedom

    4freedom

    3
    0
    Nov 21, 2014
    [​IMG]

    1) You where right it is actually a Lipo 3.7v 220 mAH battery. So I am presuming this Lipo 3.7v 120mah will work the same and is smaller : http://tinyurl.com/lz9qfkp

    2) By connectors I mean those 2 circled components. If those are able to be reused I was wondering which wires I should cut and re connect a 1 track 3 X 3 X 3MM reader. Or if I have to use one that is 3 track.

    http://tinyurl.com/plwjx5x

    Are any of these here compatible?
     
  7. (*steve*)

    (*steve*) ¡sǝpodᴉʇuɐ ǝɥʇ ɹɐǝɥd Moderator

    25,497
    2,839
    Jan 21, 2010
    Is your card skimmer too large? Is that the problem?
     
    davenn likes this.
  8. Frenoy Osburn

    Frenoy Osburn

    64
    24
    Nov 20, 2014
    The new battery doesn't seem to be that small, neither does the reader. So what's exactly the idea behind the replacements?

    Either way if your replacement doesn't contain a connector, it's best to re-use the connector on the board (if you can't easily obtain new ones). It's advisable to cut them mid-way, so that you have enough wire to work with both the old component and the connector.
     
  9. (*steve*)

    (*steve*) ¡sǝpodᴉʇuɐ ǝɥʇ ɹɐǝɥd Moderator

    25,497
    2,839
    Jan 21, 2010
    So it is for a card skimmer (based on the fact you disappeared after being outed).

    I'll close this thread.
     
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