usb soldering

Discussion in 'The Projects Forum' started by aac9876, Apr 18, 2007.

  1. aac9876

    Thread Starter Active Member

    Dec 9, 2006
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    i'm trying to us old cords and usb power etc... I know what is power +
    and neg on a USB A. But which is power in and which is power out,
    the pos or the neg????:confused:
     
  2. aac9876

    Thread Starter Active Member

    Dec 9, 2006
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    I blew that ,,I mean which is DATA in and DATA out........
     
  3. beenthere

    Retired Moderator

    Apr 20, 2004
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  4. n9352527

    AAC Fanatic!

    Oct 14, 2005
    1,198
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    There's no data in and data out. They use the same link, which is a differential link D+ and D-. The page beenthere referenced above shows the pinouts.
     
  5. Eddy Kurent

    Member

    Apr 9, 2007
    18
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    Look at the attachment.
     
  6. n9352527

    AAC Fanatic!

    Oct 14, 2005
    1,198
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    Well... still no.

    There are no data in and data out wires. Both D+ and D- form a bidirectional differential signal data link between the host and peripheral, which the direction is protocol controlled by the host.

    Please refer to USB standard.
     
  7. windy

    Member

    Apr 19, 2007
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    I think what is being said here is that the in out control is a software solution.(traffic control scheme)
     
  8. windy

    Member

    Apr 19, 2007
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    also what may be in question is do you need a crossover or is d+ tied to d+ and d- to d-.
     
  9. aac9876

    Thread Starter Active Member

    Dec 9, 2006
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  10. windy

    Member

    Apr 19, 2007
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    Looks to me like you want to know about RS-232 pinout. You might just get a RS-232 to usb adapter. saves the driver problem.
     
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