Finding sound pin/connection for reactive LED on o3DS?

Discussion in '3DS - Console, Accessories and Hardware' started by KevAqn, Jan 19, 2016.

  1. KevAqn
    OP

    KevAqn Member

    Newcomer
    30
    7
    Nov 30, 2015
    United States
    Pretty serious about this idea seeing as how I'm planning on picking up a 3d printer some time and will use it for transparent buttons and such. Where would I find a connection that I could make on the main board that would be usable for a sound reactive LED?
     
  2. hippy dave

    hippy dave Butts Butts Megabutts

    Member
    2,587
    1,802
    Apr 30, 2012
    How about the connection to the headphone socket...?
     
  3. olku

    olku Member

    Newcomer
    29
    14
    Oct 31, 2015
    I would try the speaker connection, because headphone socket might not be active when headphones are not plugged in.
     
  4. blax722

    blax722 GBAtemp Regular

    Member
    100
    28
    Sep 6, 2015
    Umm, hey, look at this, especialy at the step 20. Personally I would try to solder the LEDs directly to the point where are speakers soldered to the flex cable (that would on 99% mean the LEDs won't work if you connect the headphones to it), or try with multimeter continuity mode to find pins (if there are any) on the main board where the speakers or headphones leads through the flex cables and so.
     
  5. olku

    olku Member

    Newcomer
    29
    14
    Oct 31, 2015
    Yes, leds wont work when headphones are connected, to counter it, you have to run led wires to both, speaker and headphone jack.
     
  6. blax722

    blax722 GBAtemp Regular

    Member
    100
    28
    Sep 6, 2015
    I can't imagine the circuit then. He would need to add some diodes then, no?
     
  7. KevAqn
    OP

    KevAqn Member

    Newcomer
    30
    7
    Nov 30, 2015
    United States
    I guess the main issue I'm having would be how the hell would I get the system to run while not in a shell such that I could test all the ribbon cables in that little corner?

    As for the headphone jack, I'm pretty sure they wouldn't leave that running without something plugged in, and it alone wouldn't have a great enough voltage :(
     
    Last edited by KevAqn, Jan 21, 2016
  8. KevAqn
    OP

    KevAqn Member

    Newcomer
    30
    7
    Nov 30, 2015
    United States
    Found the connections I needed to light up an LED, until I get some transparent buttons printed I won't be doing anything.
    [​IMG]