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 layers334.4 × 169 mm
Keyboard(mech split)
deepesh-neelam/Wireless-Split-KeyboardA wireless split mechanical keyboard built from scratch using KiCad, featuring the Seeed XIAO nRF52840 and Kailh Choc V1 hotswap switches.
- Size
- 334.4 × 169 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 105
- Nets
- 82
- Pads
- 598
- Tracks, vias
- 1,169, 29
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 18 Mar 2026
- Updated
- 21 Mar 2026
Overview
Keyboard(mech split) is an open-source printed circuit board by deepesh-neelam, from the deepesh-neelam/Wireless-Split-Keyboard repository on GitHub. It is a 2-layer board of 334.4 × 169 mm with 105 parts on 82 nets, routed with 1,169 tracks and 29 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 Mechanical Keyboard
A custom wireless split mechanical keyboard designed from scratch as part of the Hack Club Stasis program.
Features
- Wireless via Bluetooth (nRF52840)
- Split design with 21 keys per half
- Kailh Choc V1 hotswap sockets
- Column stagger layout
- Battery powered with voltage sensing
- ZMK firmware compatible
Hardware
- MCU: Seeed XIAO nRF52840
- Switches: Kailh Choc V1 (hotswap)
- Diodes: 1N5819 SOD-123
- PCB designed in KiCad 9.0
Libraries Used
- marbastlib (switch footprints)
- Panelization.pretty (mousebites)
Firmware
This keyboard uses ZMK firmware. See the ZMK documentation for setup instructions.
Status
PCB design complete — pending manufacturing and assembly.
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 | PCM_marbastlib-choc:SW_choc_v1_HS_CPG135001S30_1.25u | SW1, SW2, SW10, SW11, SW12, SW13, SW14, SW15, SW16, SW17, SW18, SW19, SW20, SW21, SW22, SW23 +26 |
| 8 | MountingHole | MountingHole:MountingHole_2.2mm_M2 | H4, H5, H6, H7, H8, H9, H10, H11 |
| 4 | TestPoint | TestPoint:TestPoint_Pad_D2.0mm | TP1, TP2, TP3, TP4 |
| 3 | MountingHole | Panelization:mouse-bite-5mm-slot | H1, H2, H3 |
| 2 | 2M | Resistor_SMD:R_0805_2012Metric | R2, R4 |
| 2 | 806K | Resistor_SMD:R_0805_2012Metric | R1, R3 |
| 2 | Seeeduino Xiao nRF52840 | custom:modified-XIAO-nRF52840-SMD (3) | U1, U2 |
Questions
How big is the Keyboard(mech split) PCB?
It measures 334.4 × 169 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Keyboard(mech 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 Keyboard(mech split) KiCad files?
From the deepesh-neelam/Wireless-Split-Keyboard repository on GitHub, at the commit this page was made from: the board is Keyboard(mech split).kicad_pcb and its schematic Keyboard(mech split).kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Keyboard(mech split) design in my own project?
Its repository states no licence, so its author keeps all rights: ask deepesh-neelam before reusing the design.
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