help needed OTG device

Discussion in 'The Projects Forum' started by kaapro9, May 27, 2014.

  1. kaapro9

    Thread Starter New Member

    May 27, 2014
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  2. wayneh

    Expert

    Sep 9, 2010
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    The first 3 points are easy. You just need the right connectors and they are all in parallel. Each port has 4 conductors; each "A" conductor is connected to the other "A"s, and so on.

    Is the SD card reader also a USB device? If so, same deal as above.

    You need to choose how you want to put this all together. In an Altoids tin, for instance? On a printed circuit board?
     
  3. kaapro9

    Thread Starter New Member

    May 27, 2014
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    so i have just connect A to A so on

    no ,SD card reader like that we find in mobile phones

    i am thinking of using printed board

    could you please draw me a line diagram so that i wont go wrong
     
  4. wayneh

    Expert

    Sep 9, 2010
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    BTW, what does "OTG" stand for?

    I have no idea how you would connect the SD card in a useful way. What functionality do you want it to have? You have only USB connections, but anything that can talk to an SD card needs an SD interface.

    You could accomplish the USB connections by just using a commercially available USB hub. Something like this maybe.

    [​IMG]
     
  5. mcgyvr

    AAC Fanatic!

    Oct 15, 2009
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    There are TONS of cheap devices out there already that do what you want or very similar.
    You can't just wire an SD card right into a usb slot. It needs an interface (thats above "amateur" league)

    seems like you need this but with 1 extra USB port.. search around and I'm sure you can find exactly what you want or 2 off the shelf devices that will accomplish it.
    http://www.newegg.com/Product/Product.aspx?Item=N82E16820199039
     
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  6. sirch2

    Well-Known Member

    Jan 21, 2013
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    wayneh likes this.
  7. wayneh

    Expert

    Sep 9, 2010
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    Ah, I see the OP needs micro USB, so the example hub I showed is not suitable.
     
  8. kaapro9

    Thread Starter New Member

    May 27, 2014
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