4 layers234 × 84 mm
Main panel
google/mozc-devices
Circuit diagrams and firmware source code for Gboard DIY keyboards
234 parts3kApache-2.0
2 layers240.3 × 84 mm
Split Keyboard - KiCad
DevX-Dragon/OVERRIDE-X3D-Split-Keeb1An split keyboard designed from scratch!
- Size
- 240.3 × 84 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 117
- Nets
- 93
- Pads
- 464
- Tracks, vias
- 546, 65
- Pours
- 1
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 31 Jan 2026
- Updated
- 13 Feb 2026
Overview
Split Keyboard - KiCad is an open-source printed circuit board by DevX-Dragon, from the DevX-Dragon/OVERRIDE-X3D-Split-Keeb repository on GitHub. It is a 2-layer board of 240.3 × 84 mm with 117 parts on 93 nets, routed with 546 tracks and 65 vias.
It is built around the SK6812MINI-E. Its parts include 50 diodes, 42 switches, 4 resistors and 2 ICs. It belongs with the keyboards and input boards and the nRF52 and nRF5x boards of this library.
Main components
1README
README.md
OVERRIDE-X3D Split Keeb
A split keyboard from-scratch, high-performance wireless split keyboard designed for ergonomic uses.
Layout
Renders
Assembled Render
PCB Render
Firmware
This keyboard runs on CircuitPython using the Adafruit HID library. Unlike compiled firmware, you can edit your keymap by simply modifying the code.py file directly on the keyboard's internal storage.
Libraries
To run this firmware, you need the following libraries in your /lib folder:
adafruit_hid (For Keyboard and Consumer Control support)
adafruit_ble (For wireless Bluetooth connectivity)
BOM
(note that this is where I purchased from, and some are bought in higher quanities then needed for cheaper prices and some websites are local-only)
| Product Name | Quantity | Source Link | Price |
|---|---|---|---|
| 1N4148 | 42 | Link | $0.60 |
| SK6812 MINI-E | 8 | Link | $1.56 |
| 820K Ohms THT Resistor | 2 | Link | $0.30 |
| 1M Ohms THT Ressitor | 4 | Link | $0.30 |
| OUTEMU Red Switches | 42 | Link | $13.74 |
| Milk Theme XDA Key Caps | 42 | Link | $10.83 |
| 800mAh 3.7V 501845P Battery | 2 | Link | $3.00 |
| Seed Studio Seeed XIAO-nRF52840-Sense | 2 | Link | $43.12 |
| Total | $73.45 |
The reason for using the Seed Studio Seeed XIAO-nRF52840-Sense is becuase thats the only compact MCU which has enough pins for this. The esp32-s3 is another alternative but doesnt have pins to control the LEDs. So I had to go with this. There are no other MCU thats fits in the same size and have the same amount of pins.
Support
I would love getting financially supported as most of my projects cost alot of money here in Sri Lanka. Even a 1$ is great!
Parts
117| Qty | Value | Footprint | References |
|---|---|---|---|
| 42 | ~ | ScottoKeebs_MX:MX_PCB_1.00u | S1, S2, S10, S11, S12, S13, S14, S15, S16, S17, S18, S19, S20, S21, S22, S23 +26 |
| 42 | ~ | ScottoKeebs_Components:Diode_DO-35 | D1, D2, D10, D11, D12, D13, D14, D15, D16, D17, D18, D19, D20, D21, D22, D23 +26 |
| 10 | MountingHole_M3 | MountingHole:MountingHole_3.2mm_M3 | H1, H2, H3, H4, H5, H6, H7, H8, H9, H10 |
| 8 | SK6812MINI-E | SK6812 Mini-E:SK6812MINI-E_fixed | D43, D44, D45, D46, D47, D48, D49, D50 |
| 3 | BREAK OFF | Pannelization 2:mouse-bite-5mm-slot | H14, H15, H16 |
| 2 | 2M | Resistor_THT:R_Axial_DIN0204_L3.6mm_D1.6mm_P5.08mm_Horizontal | R3, R4 |
| 2 | 806k | Resistor_THT:R_Axial_DIN0204_L3.6mm_D1.6mm_P5.08mm_Horizontal | R1, R2 |
| 2 | BAT | TestPoint:TestPoint_Pad_D2.0mm | TP1, TP2 |
| 2 | GND | TestPoint:TestPoint_Pad_D2.0mm | TP3, TP4 |
| 2 | LOGO | All Custom:Github | G***, G*** |
| 2 | XIAO-nRF52840-SMD | Modified XIAO-nRF52840-SMD:modified-XIAO-nRF52840-SMD | U1, U2 |
Questions
How big is the Split Keyboard - KiCad PCB?
It measures 240.3 × 84 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Split Keyboard - KiCad use?
117 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 Split Keyboard - KiCad KiCad files?
From the DevX-Dragon/OVERRIDE-X3D-Split-Keeb repository on GitHub, at the commit this page was made from: the board is PCB/Split Keyboard - KiCad.kicad_pcb and its schematic schematics/Split Keyboard - KiCad.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Split Keyboard - KiCad design in my own project?
Its repository states no licence, so its author keeps all rights: ask DevX-Dragon before reusing the design.
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