DS Phat Screen Swap Physical Switch (Top Screen Kept)

Discussion in 'NDS - Tutorials' started by GooseWerks, Jul 8, 2019.

  1. GooseWerks
    OP

    GooseWerks Newbie

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    Feb 14, 2019
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    Hello,

    I saw an old (locked) thread about making a switch that would swap the screens on a DS Phat from top to bottom on a single screen, which is useful for a Macro build or a DMG shell build. I've been doing DMG shell builds but the Macros will work the same way.

    Here's the schematic that I've drawn:
    [​IMG]

    Using a three terminal switch, keeping the middle pin as the top screen input and the left and right pins as the signal 1 and signal 2 pins respectively, you'll be able to switch back and forth between the top and bottom screens without any signal loss or degradation. I've also marked a few spots to trim the board to fit in a DMG shell and marked some of the surface mound LEDs to be removed if you use external LEDs.

    DCLK1 and DCLK2 are the test pads that correspond to the top and bottom screen signals, with Signal 1 being the bottom screen and Signal 2 being the top screen. You can use the touchscreen as well with this screen swap method because it doesn't alter touchscreen input at all. This schematic uses the top screen due to it's longer ribbon cable because I shoehorn these into DMG shells. Cutting the trace is the most difficult part of this entire operation. You'll want to use a fiberglass rubbing pen or similar to buff the silk screen around the through hole to solder your wire as well. I like to use legs cut from the resistor and solder those into the hole.

    Happy to alter or accept advice on this method! It's been working very well for me; the method shown in the other thread always gave me certain amounts of screen degradation.
     
  2. DeoNaught

    DeoNaught I'm here to steal memes and break dreams

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    Aug 22, 2016
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    Constant Fear
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  3. GooseWerks
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    GooseWerks Newbie

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    Feb 14, 2019
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    Awesome! Yes, there's a 330ohm resistor to be added, it's on the lower right half of the schematic I posted. That will bypass the bottom screen LED so the DS will power up.
     
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  4. froggestspirit

    froggestspirit D/P/Pt Demix Guy

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    Jul 28, 2011
    United States
    Well well well! I might be the one that posted the first public schematic for screen swap, though i think i posted it on bitbuilt. I'll have to try this out, since my original way gave me screen jitters from time to time. nice find! :)
     
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  5. GooseWerks
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    GooseWerks Newbie

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    Feb 14, 2019
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    It probably was! I was getting a lot of jitter but this one is jitter-free. I'm not sure what was causing it but I appreciate you giving the idea for this.
     
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