Part IV – Audio/Video Wiring

NOTE: These guide sections are incomplete and not likely to be updated, but there is still some valid information in them. This is for reference only.  


Wiring The Audio Amp to The N64 Mother Board

Wiring the audio is a three phase process, the signal wires from the N64 to the Amp, the power from the N64 to the Amp and the signal wiring from the Amp to the speakers and the tact switches.

Because of the trimming that is required for the main mother board to fit, the main A/V outputs need to be moved down to the next point of contact. Wiring to the caps below will get the clearance required for the cut.

Red (Right) can be wired to Cap C122
White (Left) can be wired to Cap C23

For the 5V that’s required to power the amp, you have to tap into the 5V line on the N64 board. This can be achieved by soldering to the 5v 7805 volt regulator output on the N64 motherboard. 

N64 Kit - Audio Wiring copy

Omitted from the diagram was the explanation of the Up/Down outputs which are of course the volume controls. These need to be wired to the main tact board (diagram below). You could wire these to any of the 6 buttons you choose, but I prefer to keep the volume buttons paired and the screen controls grouped together.

 


  • Wiring The Speakers to The Amp

    For a portable handheld unit, speaker quality is a bit of a challenge. The included PUI Audio speakers are 28mm diameter and have a very nice range for their size. They are a bit more expensive than other alternatives, but their quality sound and low profile make them ideal.

     

     Similar to wiring the inputs to the amp, wiring the outputs to the speakers is the same process. As with the input and video, 28 AWG is recommended but 30 AWG will work. Some will claim that only shielded wire should be used for A/V signal and though shielded is the better practice, because there is such a short distance these wires need to run, there’ not a lot of interference generated to cause any noticeable issues.

  • Wiring The Screen to the N64 Mother Board

 


 

  • Wiring The Tact Board

There are going to be a couple ways this can be done. There is a 3D printed STL file available in the Parts List that will fit with case design that you can manually wire up. There are also a couple versions of a an actual PCB that were done up.

Wiring the main tact board is a straight forward process for the most part. Now really, you are free to put these volume and screen controls in any configuration you choose, but this is what I use most of the time. You will notice though that there are 6 buttons and only 5 controls. This is done because some screens can come with a display on/off. These screens included with the kit don’t have that option, but the same layout is used in other projects.  As with the audio, we have to wire the screen to a board as well to get the Menu options to function properly.

 

In the past, the screen’s controls used to be part of the screens PCB, but now most of the 5″ screens all have an independent board for the tact switches. Unfortunately we need to keep this board in order to control the screens options like brightness/contrast, etc… Personally I like to remove the tact switches from the board, but it should still fit in the case with them still attached and all you have to do is wire a signal to each switch to the tact board and a ground lead from the board to the tact switches.