2 layers314.3 × 76.2 mm Bkf unibodysplit, the printed circuit board in 3D

Bkf unibodysplit

BKF Unibody Split KiCad PCB project

Size: 314.3 × 76.2 mm
Copper layers: 2
Thickness: 1.6 mm
Parts: 125
Nets: 71
Pads: 683
Tracks, vias: 499, 29
Pours: 1
Routed: Yes
KiCad: KiCad 10.0 (file 20260206)
Created: 9 Jun 2026
Updated: 9 Jun 2026

Overview

Bkf unibodysplit is an open-source printed circuit board by drhigsby, from the drhigsby/BKF-US repository on GitHub. It is a 2-layer board of 314.3 × 76.2 mm with 125 parts on 71 nets, routed with 499 tracks and 29 vias.

It is built around the RP2040-ZERO. Its parts include 48 diodes and 1 IC. It belongs with the RP2040 boards of this library.

Main components

RP2040-ZERO
-- Development Boards & Kits ROHSWaveshareDevelopment Boards & Kits

README

README.md

BKF Unibody Split (BKF-US)

A custom 40% unibody split keyboard PCB designed in KiCad.

Overview

The BKF Unibody Split is a 4x12 (48-key) unibody split layout — both halves on a single PCB. It uses standard MX switches and is powered by an RP2040 Zero microcontroller.

Layout

KLE Preview

4x12 unibody split
Standard MX switch footprints
FR4 plate design included

Hardware

MCU: RP2040 Zero
Switches: MX compatible
Plate: FR4 (KiCad project included)

Case

3D printable case files are included in the case stuff/ directory:

bkf unibody split case v4.stl — current case design
bkf unibody split case - extra planar cuts v1.stl — variant with additional planar cuts
bkf unibody split case project.3mf — OrcaSlicer project file with tuned slicing parameters
plate projected geometry only.dxf — plate geometry for CAD reference
pcb test fit v1.stl — PCB test fit model

Firmware

VIAL firmware is available in the drhigsby/vial-qmk fork under keyboards/drhigsby/bkf_us/.

Project Structure

text

bkf-unibodysplit - primary pcb/   # Main PCB design
bkf-unibodysplit - plate design/  # FR4 plate design
case stuff/                        # Case STL files and DXFs

Category and platform

RP2040

Project files

Show this board on your page

https://pcbkit.io/boards/drhigsby/BKF-US

The board's own page, for a message or a post.

Source

Repository: drhigsby/BKF-US
Board file: bkf-unibodysplit - primary pcb/bkf-unibodysplit.kicad_pcb
Commit: b7f08d7
Licence: Not stated

Parts

125

Qty	Value	Footprint	References
55	MX-NoLED	marbastlib-mx:SW_MX_1u	MX2, MX10, MX11, MX12, MX14, MX15, MX16, MX17, MX18, MX19, MX20, MX21, MX22, MX23, MX25a1, MX26 +39
48	smt/tht hybrid	Keebio-Parts.pretty-master:Diode-Hybrid-Back	D1, D2, D10, D11, D12, D13, D14, D15, D16, D17, D18, D19, D20, D21, D22, D23 +32
7	MX-NoLED	marbastlib-mx:SW_MX_1.25u	MX37, MX39a1, MX40, MX43, MX44a1, MX46, MX47
4	MX-NoLED	marbastlib-mx:SW_MX_1.75u	MX13, MX24, MX41, MX42
3	MX-NoLED	marbastlib-mx:STAB_MX_P_2.25u	MX25, MX41b1, MX42b1
3	MX-NoLED	marbastlib-mx:STAB_MX_P_2u	MX41a1, MX42a1, MX48a1
2	MX-NoLED	marbastlib-mx:STAB_MX_P_2.75u	MX41c1, MX42c1
1	MX-NoLED	marbastlib-mx:SW_MX_1.75u_stp	MX13a1
1	MX-NoLED	marbastlib-mx:SW_MX_1.5u	MX1
1	RP2040-ZERO	RP2040-ZERO:MODULE_RP2040-ZERO	U1

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Questions

How big is the Bkf unibodysplit PCB?

It measures 314.3 × 76.2 mm and has 2 copper layers, 1.6 mm thick.

What parts does the Bkf unibodysplit use?

125 parts, built around the RP2040-ZERO. 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 Bkf unibodysplit KiCad files?

From the drhigsby/BKF-US repository on GitHub, at the commit this page was made from: the board is bkf-unibodysplit - primary pcb/bkf-unibodysplit.kicad_pcb and its schematic bkf-unibodysplit - plate design/bkf-unibodysplit.kicad_sch. PCBKit opens the board in the browser, with nothing to install.

Can I use the Bkf unibodysplit design in my own project?

Its repository states no licence, so its author keeps all rights: ask drhigsby before reusing the design.