4 layers234 × 84 mm
Main panel
google/mozc-devices
Circuit diagrams and firmware source code for Gboard DIY keyboards
234 parts3kApache-2.0
2 layers82 × 89 mm
The KPad is a simple macropad made by me just to learn the process and hopefully make revisions or a full keyboard in the future!! This was made using KMK, KiCad, Fusion 360, and more.
- Size
- 82 × 89 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 36
- Nets
- 39
- Pads
- 161
- Tracks, vias
- 412, 12
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 29 Nov 2025
- Updated
- 2 Dec 2025
Overview
KPad is an open-source printed circuit board by KaushikDuddala, from the KaushikDuddala/KPad repository on GitHub. It is a 2-layer board of 82 × 89 mm with 36 parts on 39 nets, routed with 412 tracks and 12 vias.
It is built around the SK6812MINI-E. Its parts include 25 diodes, 9 switches, 1 IC and 1 connector. It belongs with the keyboards and input boards and the RP2040 boards of this library.
Main components
1README
readme.mdKPad v1!
The KPad is a simple macropad made by me just to learn the process and hopefully make revisions or a full keyboard in the future!! This was made using KMK, KiCad, Fusion 360, and more.
Features:
- 128x32 OLED with volume display
- EC11 Encoder for Volume
- 16 SK6812 LEDs for underglow!!
- 8 keys + physical key in the ec11
- KMK firmware
Future Features:
- Swappable Modes (Single key swaps a mode that chaanges all key functions)
- VIA support
- Better software LED control
- Better case design
- Acrylic rather than hole in case
Final Design
PCB Design:
Case:
Bill of Materials (BOM):
- x9 1N4148 Diodes
- x8 Cherry MX switches
- x8 Keycaps
- x1 EC11 Encoder w/ switch
- x1 128x32 0.91" OLED screen
- x1 Seeed Studio XIAO RP2040
- x16 SK6812 LEDs
- x1 Case (2 3d printed halves)
- x4 M3x16mm Screws
- x4 M3x5mmx4mm heatset inserts
| Id | Designator | Footprint | Quantity | Designation |
|---|---|---|---|---|
| 1 | D22,D17,D18,D24,D19,D20,D23,D25,D21 | D_DO-35_SOD27_P7.62mm_Horizontal | 9 | 1N4148 |
| 2 | SW3,SW9,SW4,SW6,SW8,SW5,SW7,SW2 | SW_Cherry_MX_1.00u_PCB | 8 | SW_Push |
| 3 | SW1 | RotaryEncoder_Alps_EC11E-Switch_Vertical_H20mm | 1 | RotaryEncoder_Switch |
| 4 | J1 | SSD1306-0.91-OLED-4pin-128x32 | 1 | Conn_01x04 |
| 5 | U1 | XIAO-RP2040-DIP | 1 | XIAO-RP2040-DIP |
| 6 | D9,D4,D15,D7,D12,D2,D14,D3,D13,D8,D6,D11,D10,D1,D5,D16 | LED_SK6812MINI_PLCC4_3.5x3.5mm_P1.75mm | 16 | SK6812MINI |
Parts
36| Qty | Value | Footprint | References |
|---|---|---|---|
| 16 | SK6812MINI | LED_SMD:LED_SK6812MINI_PLCC4_3.5x3.5mm_P1.75mm | D1, D2, D3, D4, D5, D6, D7, D8, D9, D10, D11, D12, D13, D14, D15, D16 |
| 9 | 1N4148 | Diode_THT:D_DO-35_SOD27_P7.62mm_Horizontal | D17, D18, D19, D20, D21, D22, D23, D24, D25 |
| 8 | SW_Push | Button_Switch_Keyboard:SW_Cherry_MX_1.00u_PCB | SW2, SW3, SW4, SW5, SW6, SW7, SW8, SW9 |
| 1 | Conn_01x04 | KiCad-SSD1306-0.91-OLED-4pin-128x32.pretty-master:SSD1306-0.91-OLED-4pin-128x32 | J1 |
| 1 | RotaryEncoder_Switch | Rotary_Encoder:RotaryEncoder_Alps_EC11E-Switch_Vertical_H20mm | SW1 |
| 1 | XIAO-RP2040-DIP | OPL:XIAO-RP2040-DIP | U1 |
Questions
How big is the KPad PCB?
It measures 82 × 89 mm and has 2 copper layers, 1.6 mm thick.
What parts does the KPad use?
36 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 KPad KiCad files?
From the KaushikDuddala/KPad repository on GitHub, at the commit this page was made from: the board is PCB/KPad.kicad_pcb and its schematic PCB/KPad.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the KPad design in my own project?
Its repository states no licence, so its author keeps all rights: ask KaushikDuddala before reusing the design.
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