1. how_do_i_do_that

    how_do_i_do_that Blue Wizard is about to die.
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    There is a prototyping board for that software. You still have to design a flex cable for it. To get a dev kit still will cost you a few hundred bucks for you to start prototyping anything.

    Example of the OG 3DS capturecard:
    [​IMG]

    Example of that Flex cable for that capturecard:
    [​IMG]


    You will have to map out all the pinouts you need from a 2DS XL for the prototyping board.



    ---

    To clarify what is above, you need several things if your going to make your own capturecard.

    A usb controller:
    Kat uses something called a Chameleon USB controller (I can only find conflicting information on this, I don't believe the usb controller is actually called Chameleon.)
    You will have to get a dev board to make your own custom drivers (library files and compiler files will come with the dev kit)
    I'd recommend you use a USB C or 3 controller just for the bandwidth. The problem is if your going to be using a RPI as an intermediate to output HDMI, your going to be using a USB 2 interface controller.

    A FPGA:
    Kat uses a XILINIX spartan for the later n3DS and n2DS. This is used for converting the 3DS video signals into a format that the USB controller can handle.
    The one he uses is no longer being sold, but you might find a used dev kit one on ebay. Or just buy what is available on the usual digikey, mouser, etc site.

    The use of a HDMI port would require you have a full arm chip to process the signal, this can increase the board size used do to the amount of chips you have to have to just converting the video source to HDMI then outputing it to HDMI output.
    HDMI uses 12V, that means your going to be adding an AC adapter to your design just to power the HDMI output unless your want to only be able to run your 3DS to an hour or so.
    Your 2/3DS battery has to also power your capturecard.


    You want to talk to loopy if you seriously want to make your own capturecard.
     
    Last edited by how_do_i_do_that, Apr 19, 2019
    Ryccardo and CursedToast like this.
  2. Deleted User

    OP Deleted User Newbie

    So maybe it would just be more efficient to build the converter from scratch. Maybe someone could come up with a DIY board solution like the one for GC I've been interested in building sometime

    — Posts automatically merged - Please don't double post! —

    What's the USB for? We're talking about a purely native video+audio to HDMI mod here.
     
  3. how_do_i_do_that

    how_do_i_do_that Blue Wizard is about to die.
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    Since you want to drag this out. Here is loopy's HDMI version:
    [​IMG]

    It is also not for sale. Dev pics here.
     
  4. Deleted User

    OP Deleted User Newbie

    I'm guessing that's just for firmware updates and maybe powering it.
     
  5. how_do_i_do_that

    how_do_i_do_that Blue Wizard is about to die.
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    For firmware updates, not likely. The fpga on that board is a burn once version. The reprogramable version of the chip is much larger.

    As for powering the thing, you will have to ask loopy. It wasn't and still isn't for sale.
     
  6. Deleted User

    OP Deleted User Newbie

    Found something called an orange pi for $15
    [​IMG]
    Maybe with some custom software, this could do the trick for an external 3DS Video + Audio to HDMI solution?
     
  7. Deleted User

    OP Deleted User Newbie

    @CursedToast think something like this could work?

    Since It'll be working with 240p signals for the 3DS, I'm thinking it could also act as a retro console line doubler as a secondary function by adding svideo and rca ports to the pins (sharing with the 3DS connector). In which case the software could have a menu to switch between 3DS, composite, component and Svideo input.

    I'm also wondering if the camera interface might be compatible with the 3DS output, that might simplify the work.
     
    Last edited Apr 22, 2019
  8. saitomegimagi

    saitomegimagi Newbie
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    Sorry to bump an old thread, if its against the rules i could make a new thread if that's the case. But i have a question, would this be possible with a raspberry pi zero or banana pi m2 zero?
     
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