4 layers234 × 84 mm
Main panel
google/mozc-devices
Circuit diagrams and firmware source code for Gboard DIY keyboards
234 parts3kApache-2.0
2 layers63.1 × 75.2 mm
Hackpad
rishabhreng/hackpadA 6-key macropad, in an "A" shape, with a 0.91" OLED display and a rotary encoder. It also has one LED under the central key, and everything is controlled with KMK firmware.
- Size
- 63.1 × 75.2 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 17
- Nets
- 22
- Pads
- 85
- Tracks, vias
- 208, 10
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 2 Jun 2025
- Updated
- 2 Jun 2025
Overview
Hackpad is an open-source printed circuit board by rishabhreng, from the rishabhreng/hackpad repository on GitHub. It is a 2-layer board of 63.1 × 75.2 mm with 17 parts on 22 nets, routed with 208 tracks and 10 vias.
It is built around the SK6812MINI-E. Its parts include 7 diodes, 7 switches, 1 IC and 1 connector. It belongs with the RP2040 boards of this library.
Main components
1README
README.mdMacroPad Overview
A 6-key macropad, in an "A" shape, with a 0.91" OLED display and a rotary encoder. It also has one LED under the central key, and everything is controlled with KMK firmware.
This was my first time designing a macropad or any other electronics with KiCad, and I really enjoyed it (esp. learning more about the wiring). Fortunately, I have some experience with CAD in Onshape, so modeling the case went smoothly.
 |  |
Pictures
| Schematic | PCB | Case |
|---|---|---|
 |  |  |
Schematic and PCB designed in KiCad. The CAD model and whole assembly were designed in Onshape (after trying this process in Fusion 360, I wanted to redesign in Onshape as it felt much more natural and familiar).
Bill of Materials (BOM)
- 1x XIAO RP2040
- 6x MX-like switches
- 6x DSA keycaps
- 6x through-hole 1N4148 diodes
- 1x SK6812 MINI-E LED
- 1x 0.91" 128x32 OLED display
- 1x EC11E rotary encoder
- 1x case, made of 2 printed parts (Top.step and Bottom.step )
- 4x M3x16mm screws
Parts
17| Qty | Value | Footprint | References |
|---|---|---|---|
| 6 | D | Diode_THT:D_DO-35_SOD27_P7.62mm_Horizontal | D2, D3, D4, D5, D6, D7 |
| 6 | SW_Push | MX_Solderable:MX-Solderable-1U | SW2, SW3, SW4, SW5, SW6, SW7 |
| 1 | LOGO | libs:logo | G*** |
| 1 | OLED DISPLAY | OLED:SSD1306-0.91-OLED-4pin-128x32 | J1 |
| 1 | RotaryEncoder_Switch | Rotary_Encoder:RotaryEncoder_Alps_EC11E-Switch_Vertical_H20mm | SW1 |
| 1 | SK6812MINI | libs:SK6812-MINI-E | D1 |
| 1 | XIAO-RP2040-DIP | OPL:XIAO-RP2040-DIP | U1 |
Questions
How big is the Hackpad PCB?
It measures 63.1 × 75.2 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Hackpad use?
17 parts, built around the SK6812MINI-E. 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 rishabhreng/hackpad repository on GitHub, at the commit this page was made from: the board is pcb/hackpad.kicad_pcb and its schematic pcb/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 states no licence, so its author keeps all rights: ask rishabhreng before reusing the design.
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