2 layers
Encoder
byrantech/laptop
anyon_e, a highly integrated, high end, open source laptop. Attempt the impossible.
7 parts4.3kMIT
2 layers66.4 × 56 mm
Dualjoy
ansiwen/dualjoy7Retro joystick USB adapter
- Size
- 66.4 × 56 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 7
- Nets
- 40
- Pads
- 110
- Tracks, vias
- 34, 0
- Pours
- 1
- Routed
- Yes
- KiCad
- KiCad 10.0 (file 20260206)
- Created
- 6 Jan 2025
- Updated
- 12 Oct 2026
Overview
Dualjoy is an open-source printed circuit board by ansiwen, from the ansiwen/dualjoy repository on GitHub, published under the MIT licence. It is a 2-layer board of 66.4 × 56 mm with 7 parts on 40 nets, routed with 34 tracks and 0 vias.
It belongs with the retro computing and games and keyboards and input boards and the RP2040 boards of this library.
README
README.mdDualJoy
This is a firmware for the Rapsberry Pi Pico that turns it into a USB adapter for two D-Sub 9 joysticks, as they where used for example with the Atari 2600 console and the Commodore C64 and Amiga home computers. They will appear as two digital hats/d-pads with only one button.
The code is based on the various examples of the Pico SDK and TinyUSB and keeps their MIT license.
Usage
You can use the precompiled binary from the release page if you use the same GPIOs as in the hardware example below:
| GPIO | D-SUB pin | Function |
|---|---|---|
| 10 | 1 (J1) | J1 UP |
| 11 | 2 (J1) | J1 DOWN |
| 12 | 3 (J1) | J1 LEFT |
| 13 | 4 (J1) | J1 RIGHT |
| 9 | 6 (J1) | J1 BTN |
| 18 | 1 (J2) | J2 UP |
| 19 | 2 (J2) | J2 DOWN |
| 20 | 3 (J2) | J2 LEFT |
| 21 | 4 (J2) | J2 RIGHT |
| 17 | 6 (J2) | J2 BTN |
Additionally you need to connect pin 8 of both D-SUB connectors with GND on the Pico.
Build
If you want to use different GPIOs, you easily can build the firmware yourself. Like any other pico project, after installing the Pico SDK you do:
$ mkdir build
$ cd build
$ cmake ..
$ makeIf building for the Pico 2 (RP2350), use cmake -DPICO_BOARD=pico2 .. instead.
Simple hardware example
PCB
A ready-made PCB with a matching top and bottom plate as enclosure is available in hardware/.
Parts
7| Qty | Value | Footprint | References |
|---|---|---|---|
| 4 | MountingHole_3.2mm_M3 | MountingHole:MountingHole_3.2mm_M3 | H1, H2, H3, H4 |
| 2 | DE9_Pins | Connector_Dsub:DSUB-9_Pins_Horizontal_P2.77x2.84mm_EdgePinOffset9.90mm_Housed_MountingHolesOffset11.32mm | J1, J2 |
| 1 | RaspberryPi_Pico | Module:RaspberryPi_Pico_Common_Unspecified | A1 |
Questions
How big is the Dualjoy PCB?
It measures 66.4 × 56 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Dualjoy use?
7 parts. The full list of its parts is on this page, with links to each part's symbol and footprint where PCBKit's library has them.
Where can I download the Dualjoy KiCad files?
From the ansiwen/dualjoy repository on GitHub, at the commit this page was made from: the board is hardware/kicad/dualjoy.kicad_pcb and its schematic hardware/kicad/dualjoy.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Dualjoy design in my own project?
Its repository publishes it under the MIT licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).
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