Worklog The Duvalin Dual Sabor (Dual wifi + composite out mod)

Joined
Jul 25, 2026
Messages
2
Likes
6
Location
Mexico
Context.
Is a DS Lite with the video mod, but I didn't want to lose the upper screen, so I needed to add the dual wifi mod and have 2 different firmwares.


20260724_191650.webp

Tools. -
  • Hot iron
  • Solder wire
  • jumper wire
  • Flux
  • 2-position switch
  • 1 push button
  • A Dremel tool
  • 1 TRSS 2.5mm connector
  • UV curable solder mask
  • T-7000 Adhesive
  • Krazy kola
  • A modded Wi-Fi module
  • 6 470Ohms resistors
  • 4 220Ohms resistors
Log. -
First thing I opened the DS to get to the motherboard, i soldered a circuit made from resistors to get the video signal then cured the soldered pads and VIAs.
I already had a USB-C mod installed. (I know it looks bad but it's working)
solder.webp
cured.webp

Then I tested on other bottom cases so i can plan where to put the 2.5mm connector, the switch and the button.​

1sttry.webp
TRSS.webp

I liked how it looks on the side of the case, but I tough It was going to be uncomfortable to hold while playing so I decided to put it on the top.

I jumped the video wire to the 2.5mm connector then the GND signal to the motherboard then I soldered SPL0 and SPR0 to the connector (sorry I didn't have pictures of that)
basically, I jumped everything.

switch and button.webp
almost there.webp


The switch's middle terminal is routed to GND also the pushbutton, I broke 1 terminal from the switch because I only needed to short the dual Wi-Fi to GND when I want to use the original firmware, if it is not shorted the ds boots with the video modded firmware.
The pushbutton is routed to P0 signal on the diagram.

diagram.webp
testpoints.webp

I only using the P0 signal button because I don't need the PiP or the transparency functions because I will be using only the screen switching while connected to a screen, when not I can use the two screens.

I changed some buttons to give it a cool look, I called it the Duvalin because of the Mexican candy colors and also the fact that there's 2 modes of use.

Final result. -

20260724_191231.webp

20260724_191322.webp

20260724_191347.webp



Credits. -

Thanks to @LCandell, if it wasn't for you, I would've procrastinated this project forever also thanks for the dual Wi-Fi mod I asked you to make for me.
Thanks to my wife, she took care of my child while I was locked on the bench working on this and also thank you for cheering me on all my projects.

 

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