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HackPad
yahyaGoblin/GamePad-miniA compact 6-key macropad with two potentiometers built on the Seeed XIAO. Open source hardware, KiCad design files and gerbers included.
- Size
- 100 × 100 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 42
- Nets
- 47
- Pads
- 189
- Tracks, vias
- 221, 6
- Routed
- Yes
- KiCad
- KiCad 10.0 (file 20260206)
- Created
- 21 May 2026
- Updated
- 29 May 2026
Overview
HackPad is an open-source printed circuit board by yahyaGoblin, from the yahyaGoblin/GamePad-mini repository on GitHub, published under the MIT licence. It is a 2-layer board of 100 × 100 mm with 42 parts on 47 nets, routed with 221 tracks and 6 vias.
Its parts include 13 diodes, 13 switches, 2 ICs, 2 connectors and 1 capacitor. It belongs with the keyboards and input boards of this library.
README
README.mdSplit PCB Gamepad
A custom gamepad built on a split PCB design, with two halves connected via a 14-pin ribbon cable connector on each side.
Schematic Preview
PCB Preview
3D Preview
- Split PCB — left and right halves connected via ribbon cable
- 14-pin connector on each half
- Compact and ergonomic layout
- USB-C connection to host
Bill of Materials
| Ref | Component | Value / Model | Qty |
|---|---|---|---|
| U1 | Microcontroller | Pro Micro (ATmega32U4) or RP2040 | 1 |
| SW1–SWn | Mechanical / Tactile Switch | Cherry MX or tactile equiv. | n |
| D1–Dn | Switching Diode | 1N4148 SOD-123 | n |
| J1 | Ribbon Cable Connector (Left) | 14-pin FFC/FPC or IDC | 1 |
| J2 | Ribbon Cable Connector (Right) | 14-pin FFC/FPC or IDC | 1 |
| CABLE1 | Ribbon Cable | 14-pin, length as needed | 1 |
| C1 | Decoupling Capacitor | 100nF 0402 | 1 |
Update quantities (n) based on your final button layout. Part numbers are suggestions.
PCB Design
The gamepad is split into two PCBs:
- Left half — connected to the host via USB, handles all logic
- Right half — communicates to the left half via the 14-pin ribbon cable
Both halves share the same connector footprint on the inner edges.
Firmware
Compatible with QMK or KMK with split keyboard support.
License
Open source hardware — feel free to modify and build your own.
Parts
42| Qty | Value | Footprint | References |
|---|---|---|---|
| 13 | D_Small | Diode_SMD:D_SOD-123 | D1, D2, D3, D4, D5, D6, D7, D8, D9, D10, D11, D12, D13 |
| 13 | SW_Push | Button_Switch_Keyboard:SW_Cherry_MX_1.00u_PCB | SW1, SW2, SW3, SW4, SW5, SW6, SW7, SW8, SW9, SW10, SW11, SW12, SW13 |
| 8 | MountingHole | MountingHole:MountingHole_3.2mm_M3 | H1, H2, H3, H4, H5, H6, H7, H8 |
| 3 | Break Off | Mousebites:mouse-bite-2mm-slot | BP1, BP2, BP3 |
| 2 | Conn_01x14 | Connector_PinHeader_2.54mm:PinHeader_1x14_P2.54mm_Vertical | J1, J2 |
| 1 | 100 nF | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C1 |
| 1 | MCP23017x-x-SP | Package_DIP:DIP-28_W7.62mm | U2 |
| 1 | MOUDLE-SEEEDUINO-XIAO | Xiao:XIAO-Generic-Hybrid-14P-2.54-21X17.8MM | U1 |
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Questions
How big is the HackPad PCB?
It measures 100 × 100 mm and has 2 copper layers, 1.6 mm thick.
What parts does the HackPad use?
42 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 HackPad KiCad files?
From the yahyaGoblin/GamePad-mini repository on GitHub, at the commit this page was made from: the board is HackPad/HackPad.kicad_pcb and its schematic HackPad/HackPad.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the HackPad 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).