RetroPie Inside an NES Controller





Introduction: RetroPie Inside an NES Controller

The tiny form factor of the Pi Zero makes it perfect size to hide in any number of retro objects. I have a lot of old video game accessories in my workshop and was inspired to create an emulation station when I saw a design for a RetroPie NES controller on Thingiverse. RetroPie is an open source script optimized for Raspbian and includes many popular emulators all running through EmulationStation.

Step 1: Gather the Materials

You won't need much for this build, the main trick is getting your hands on an elusive Raspberry Pi Zero. I used an original NES controller in working condition with a bad cable.

  1. Raspberry Pi Zero Budget Pack $29.95 from Adafruit
  2. An Old School Nintendo NES Controller $10 on Ebay.
  3. A 3d Printed Base to hold the Pi Zero with the ports cut in the right place. My 3d plan on Thingiverse.

If you don't have access to a 3d Printer, I have uploaded the model to Shapeways. ~$20.

Step 2: Disassemble the NES Controller

  1. Remove the screws from the back of the Controller. Be very cautious not to strip these screws, you will need them later and they are hard to replace.
  2. Trim the 3 pins holding the PCB in place above the board, you need the pins to keep holding the board, just not this long. Also Cut down the 4 holders of the cord, they are no longer necessary and the more room you can get for the Pi Zero the better.
  3. Cut the cord to about 4 inches and remove the black outer cable casing.

Step 3: Solder the NES Wires on the Pi Zero GPIO

  1. Strip the wires on the NES Pad, about a 1/4 inch of bare wire will do.
  2. Solder the Wires on the GPIO board as follows:

    White - Pin 1 (+3.3V)
    Brown - Pin 6 (GND)
    Yellow - Pin 7 (DATA)
    Red - Pin 19 (CLK)
    Orange - Pin 23 (LATCH/PULSE/STROBE/ETC)

Step 4: Burn RetroPie Onto SD Card

There are lots of tutorials on this so I will be brief.

  1. Get the right RetroPie Image. Currently RetroPie is stable on Wheezy. I used the Standard Image.
  2. I used ApplePi-Baker to burn the image.

Step 5: Software Setup

As with the last step, there are many tutorials on getting RetroPie working, PetRockBlock is a great resource. For my installation I used an HDMI compliant TV, a USB Hub, a Keyboard, and a USB Wifi Stick.

  1. Put the SD card into the Pi Zero
  2. Plug in the HDMI Monitor
  3. Plug in the USB Hub with USB Keyword and WIFI Stick
  4. Plug in the Power.

The Pi Zero should boot right into EmulationStation. There are ways to do everything from EmulationStation, I chose to use the linux command line. F4 will get you out of EmulationStation to do the rest of the config.

  1. Expand the filessystem: Run `sudo raspi-config` Run option 1.
  2. Exit raspi-config
  3. Reboot `sudo reboot`

After reboot, exit out of EmulationStation again.

  1. Enter the RetroPie Setup Utility: `sudo RetroPie-Setup/`
  2. Setup WIFI: Option 3 then Option 326. Find your WIFI and configure.
  3. Back to previous menu .

Now we install the utility that will pick up the NES pad through the Pi Zero GPIO, It is important that we do not let the script install the SNES configs.

  1. Run the Gamecon Script: Option 308 Gamecon and db9 drivers
  2. Say OK to the Firmware warning.
  3. Wait for everything to install.
  4. Say No to installing SNES configs.

Lastly we need to make sure that the GPIO kernel module gets run at boot.

  1. `sudo nano /etc/modules`
  2. Add a line at the bottom: "gamecon_gpio_rpi map=0,0,2,0,0,0"

Reboot `sudo reboot`

When the EmulationStation comes up this time you should be prompted to configure your controller (this could be hard with the controller only attached to the board and not closed up .. proceed to next step.

Step 6:

  1. Fit the Pi Zero into the base.
  2. Screw the Pi Zero into the base. I re-purposed some 7mm machine screws I found. I think some very small computer case screws will work as well.
  3. Carefully reassemble the gamepad making sure all the buttons are working.
  4. Use 5 of the 6 screws we originally took out of the NES pad to reattach it to it's new 3d printed base.

Reattach the completed NES RetroPie Controller into your monitor .. give it power .. and upon boot it will let you configure your joypad and now you are ready to install your ROMs


  • Nice job on this.  I...-reppard

    reppard made it!


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Hi, I'm a writer in South Korea.

Now I'm writing a book about Raspberry Pi.

I want to introduce this project in my book.

Can I introduce this project in my book?

Hey Gang, the software portion of this has RADICALLY CHANGED. I have it working up till emulation station with these instructions but I think that the controller config is not making it to retroarch and therefore the rest of the emulators. I have worked on this for a few days (off and on) and have come up with these install instructions to get it this far:

I preferred to SSH into the pie but you can do all this from the keyboard as as well:

sudo raspi-config

Select resize filesystem


sudo RetroPie-Setup/

update retropie-setup script


sudo RetroPie-Setup/

Manager Packages -> manager driver packages --> 809 gamecon -> install update from binary

TAKE A NAP (unpacking raspberrypi-kernel-headers takes a hour or so)

select configuration/options --> do you want to configure gamecone for 2 snes controllers? NO


sudo nano /etc/modprobe.d/gamecon.conf

put in:

options gamecon_gpio_rpi map=0,0,2,0,0,0

sudo nano /etc/modules

put in:


sudo reboot

I got it to work with the latest retropie version using your steps but there are now some more changes:

gamcon is not at 810 (there was no 809 in the driver package manager). also it didn't take that long to install so I couldn't have a proper nap :(

the more important change is in the configuration after installation where I had to say yes to the configuration of two SNES controllers otherwise no gamecon.conf file would appear in /etc/modprobe.d/!

I got this info, on this page:

Have fun and thanks for the suggestions!


Run the controller config in emulator station a second time and it worked!

So this tutorial worked as of 6-24-2016

Oh, also. I used the RetroPie 4.0.2 image they made, should I add RetroPie to Raspian instead or it makes no difference?

You have used the GPIO pins specified here in this guide and it worked?

What controller config did you run a second time for it to work?

I hold the A key, but nothing happens. I wonder if the key presses make it to the software.

Any help apprciated.

Have you seen any issues, such as the controller not being unresponsive, using the 3.3V? I only ask because I am working on a similar project only mine will have a battery, charger, and on/off switch. The project I am folloewing says that with 3.3V the controller was unresponsive so he powered it with 5V.

Hi. I was following your instructions until it started unbacking the raspberry pi kernel headers. Half way through that I got an error saying "gamecondriver install failed". Any idea on how to fix this at all?

I would try it again, perhaps the download got corrupted or something. be sure you have enough power to it, i have had them work underpowered and get strange errors.

I'm a little curious if that is possible to make same as for SNES controller.