2 layers228.4 × 85 mm
LeChiffre
tominabox1/Le-Chiffre-Keyboard
Great thanks goes to Jake at P3D for really making the case amazing and open sourcing his work. Check him out at P3Dstore.com
105 parts183GPL-3.0
2 layers281 × 81 mm
Wireless Split
yahyaGoblin/Wireless-Split-KeyboardFully wireless split keyboard PCB powered by the nice!nano (nRF52840). No cables between halves or to host. ZMK firmware, KiCad design files and gerbers included.
- Size
- 281 × 81 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 105
- Nets
- 71
- Pads
- 598
- Tracks, vias
- 1,082, 96
- Routed
- Yes
- KiCad
- KiCad 10.0 (file 20260206)
- Created
- 21 May 2026
- Updated
- 29 May 2026
Overview
Wireless Split is an open-source printed circuit board by yahyaGoblin, from the yahyaGoblin/Wireless-Split-Keyboard repository on GitHub, published under the MIT licence. It is a 2-layer board of 281 × 81 mm with 105 parts on 71 nets, routed with 1,082 tracks and 96 vias.
Its parts include 42 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.
README
README.mdWireless Split Keyboard
A fully wireless split keyboard PCB, designed for ergonomic typing with no cables between halves or to the host.
Features
- Wireless split design — no cable between halves
- Bluetooth LE connectivity to host
- Battery powered on each half
- 1N4148 diodes for full anti-ghosting / n-key rollover
- Low power design for extended battery life
Bill of Materials
| Ref | Component | Value / Model | Qty |
|---|---|---|---|
| U1–U2 | Wireless MCU | nice!nano (nRF52840) | 2 |
| SW1–SWn | Mechanical Key Switch | Cherry MX compatible | n |
| D1–Dn | Switching Diode | 1N4148 SOD-123 | n |
| BAT1–BAT2 | LiPo Battery | 3.7V 301230 or similar | 2 |
| C1–C2 | Decoupling Capacitor | 100nF 0402 | 2 |
| R1–R2 | Pull-up Resistor | 4.7kΩ 0402 | 2 |
| SW_RESET1–2 | Reset Button | 3x6mm tactile switch | 2 |
| SW_POWER1–2 | Power Switch | MSK-12C02 slide switch | 2 |
| J1–J2 | Battery Connector | JST PH 2.0 2-pin | 2 |
Update switch quantities (n) based on your layout. Part numbers are suggestions.
PCB Design
Each half is an independent PCB with its own MCU and battery:
- Left half — acts as the central device, connects to the host via Bluetooth
- Right half — acts as a peripheral, communicates wirelessly to the left half
Fabrication
Gerber files for both halves are in the /gerbers folder.
Recommended specs:
- Layers: 2
- Thickness: 1.6mm
- Surface finish: HASL or ENIG
Firmware
Designed for ZMK Firmware, which has first-class support for wireless split keyboards and the nice!nano.
Battery Life
Estimated battery life varies by usage and battery capacity. With a 110mAh battery expect several weeks of typical use.
Project Files
| File | Description |
|---|---|
keyboard_left.kicad_sch | Left half schematic |
keyboard_right.kicad_sch | Right half schematic |
keyboard_left.kicad_pcb | Left half PCB layout |
keyboard_right.kicad_pcb | Right half PCB layout |
/gerbers | Fabrication files for both halves |
License
Open source hardware — feel free to modify and build your own.
Parts
105| Qty | Value | Footprint | References |
|---|---|---|---|
| 42 | D | Diode_SMD:D_SOD-123 | D1, D2, D10, D11, D12, D13, D14, D15, D16, D17, D18, D19, D20, D21, D22, D23 +26 |
| 42 | SW_Push | Marbastlib:SW_MX_HS_KS-2P02B01-01_1u | SW1, SW2, SW10, SW11, SW12, SW13, SW14, SW15, SW16, SW17, SW18, SW19, SW20, SW21, SW22, SW23 +26 |
| 8 | MountingHole | MountingHole:MountingHole_2.2mm_M2 | H1, H2, H3, H4, H5, H6, H7, H8 |
| 4 | TestPoint | TestPoint:TestPoint_Pad_D2.0mm | TP1, TP2, TP3, TP4 |
| 3 | Break off | Mousebites:mouse-bite-5mm-slot | BO1, BO2, BO3 |
| 2 | 2M | Resistor_SMD:R_0805_2012Metric | R3, R4 |
| 2 | 806K | Resistor_SMD:R_0805_2012Metric | R1, R2 |
| 2 | XIAO-nRF52840-SMD | Modified Xiao:modified-XIAO-nRF52840-SMD | U1, U2 |
Questions
How big is the Wireless Split PCB?
It measures 281 × 81 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Wireless Split use?
105 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 Wireless Split KiCad files?
From the yahyaGoblin/Wireless-Split-Keyboard repository on GitHub, at the commit this page was made from: the board is Wireless Split/Wireless Split.kicad_pcb and its schematic Wireless Split/Half.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Wireless Split 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).
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