4 layers99 × 53.3 mm
PSLab
fossasia/pslab-hardware
PSLab Hardware Design and Schematics https://pslab.io
199 parts1.7kApache-2.0
2 layers126.2 × 84.2 mm
Split keyboard right
vxnom010207/Split-Keyboard1A 44 key layout split keyboard
- Size
- 126.2 × 84.2 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 45
- Nets
- 44
- Pads
- 176
- Tracks, vias
- 223, 11
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 24 Jan 2026
- Updated
- 24 Jan 2026
Overview
Split keyboard right is an open-source printed circuit board by vxnom010207, from the vxnom010207/Split-Keyboard repository on GitHub. It is a 2-layer board of 126.2 × 84.2 mm with 45 parts on 44 nets, routed with 223 tracks and 11 vias.
It is built around the 1N4148W. Its parts include 22 diodes, 22 switches and 1 IC. It belongs with the keyboards and input boards and the nRF52 and nRF5x boards of this library.
Main components
1README
Readme.mdWireless Split 4x5 + 2 (XIAO nRF52840)
A custom wireless split keyboard I'm building for myself. This project uses two Seeed Studio XIAO nRF52840 controllers running KMK firmware. The goal was a portable, low-profile split setup that works over Bluetooth without any cables between the halves.
Hardware
- MCU: 2x Seeed Studio XIAO nRF52840
- Matrix: (4*5)+2 Ortholinear (22 keys per side)
- Firmware: KMK (CircuitPython based)
- Connectivity: BLE (Bluetooth Low Energy) for both the PC connection and the split sync
Pin Mapping
Following my schematic, the GPIO pins on the XIAO are mapped as follows:
- Rows: D0, D1, D2, D3
- Cols: D4, D5, D6, D7, D8, D9
CAD
#PCB Layout
BOM
- 2x Seeed Studio XIAO nRF52840
- 44x Mechanical switches (22 per side)
- 44x 1N4148 signal diodes
- 2x 3.7V Li-Po batteries
- 44x 1u keycaps
- 2x Small Slide Switches (MSK-12C02)
Parts
45| Qty | Value | Footprint | References |
|---|---|---|---|
| 22 | 1N4148W | Diode_SMD:D_SOD-123 | D1, D2, D3, D10, D11, D12, D13, D14, D15, D16, D17, D18, D19, D20, D21, D22 +6 |
| 22 | ~ | Button_Switch_Keyboard:SW_Cherry_MX_1.00u_PCB | S1, S2, S3, S10, S11, S12, S13, S14, S15, S16, S17, S18, S19, S20, S21, S22 +6 |
| 1 | XIAO-nRF52840-SMD | OPL HACKPAD LIB:XIAO-nRF52840-SMD | U1 |
Questions
How big is the Split keyboard right PCB?
It measures 126.2 × 84.2 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Split keyboard right use?
45 parts, built around the 1N4148W. 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 right KiCad files?
From the vxnom010207/Split-Keyboard repository on GitHub, at the commit this page was made from: the board is split_keeb_pcb/split keyboard right.kicad_pcb and its schematic split_keeb_pcb/split keyboard left.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Split keyboard right design in my own project?
Its repository states no licence, so its author keeps all rights: ask vxnom010207 before reusing the design.
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