4 layers234 × 84 mm
Main panel
google/mozc-devices
Circuit diagrams and firmware source code for Gboard DIY keyboards
234 parts3kApache-2.0
2 layers99 × 74 mm
Hackpad
roc-ket-cod-er/TH9KIn other words, I have used 9 keyboard switches, a rotary encoder, and an OLED. The OLED goes under the big rectangualar hole, the rotary encoder in the left squarish one, the leds will be visible throught the right…
- Size
- 99 × 74 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 28
- Nets
- 30
- Pads
- 130
- Tracks, vias
- 191, 14
- Pours
- 6
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 27 May 2025
- Updated
- 29 Aug 2025
Overview
Hackpad is an open-source printed circuit board by roc-ket-cod-er, from the roc-ket-cod-er/TH9K repository on GitHub. It is a 2-layer board of 99 × 74 mm with 28 parts on 30 nets, routed with 191 tracks and 14 vias.
It is built around the SK6812MINI-E. Its parts include 16 diodes, 10 switches, 1 IC and 1 connector. It belongs with the RP2040 boards of this library.
Main components
1README
README.mdTH9K
A 9-key Macro pad with 6 LEDs, an OLED and a rotary encoder designed to go under the space bar so your thumbs too can feel useful.
BOM
- 9x KeyBoard switch
- 9x Diodes
- 6x RGB LED
- Some kind of screws, probably M3
- 1x 0.91" 128x32 OLED Display
- 1x EC11 Rotary Encoder
- 1x XIAO RP2040
- 1x Case
In other words, I have used 9 keyboard switches, a rotary encoder, and an OLED. The OLED goes under the big rectangualar hole, the rotary encoder in the left squarish one, the leds will be visible throught the right square hole, and the main switches and stuff in the last hole as shown below:
Schematic
I used the following schematic:
PCB
Which I routed into the following pcb:
Parts
28| Qty | Value | Footprint | References |
|---|---|---|---|
| 9 | D_45deg | Diode_THT:D_A-405_P7.62mm_Horizontal | D5, D6, D7, D8, D9, D10, D11, D12, D13 |
| 9 | SW_Push | Button_Switch_Keyboard:SW_Cherry_MX_1.00u_PCB | SW1, SW2, SW3, SW4, SW5, SW6, SW7, SW8, SW9 |
| 7 | SK6812MINI | LED_SMD:LED_SK6812MINI_PLCC4_3.5x3.5mm_P1.75mm | D1, D2, D3, D4, D14, D15, D16 |
| 1 | Conn_01x04_Pin | OLED:SSD1306-0.91-OLED-4pin-128x32 | J1 |
| 1 | RotaryEncoder_Switch | OLED:RotaryEncoder_Alps_EC11E_Vertical_H20mm | SW10 |
| 1 | XIAO-RP2040-DIP | OPL:XIAO-RP2040-DIP | U1 |
Questions
How big is the Hackpad PCB?
It measures 99 × 74 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Hackpad use?
28 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 roc-ket-cod-er/TH9K 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 roc-ket-cod-er before reusing the design.
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