YUKI

Made with Keyberon

Layers

Layer	Description
Layer 0	Firmware Dvorak
Layer 1	Numbers & Symbols
Layer 2	Less used keys & Macros
Layer 3	Mouse movement & buttons
Layer 4	Qwerty

Features

• 44 keys, v0.1 - Cherry MX & v0.2 - Kailh Choc V1 switches
• Uses only 1U keycaps
• TRRS connection is used for communication between the two halves
• 2 USB-C connectors, with a choice from which the keyboard should send keystrokes
• Mouse control
• OLED display (not installed in the v0.2 picture)

Bill of Materials

Product	Qty	Note
YUKI PCB	2	KiCad project files can be found in yuki_pcb directory. I ordered them from JLCPCB. They are reversible so you will use the same pcb for both left and right.
STM32F401CCU6	2	Can be found on aliexpress. I have ordered mine from a local vendor.
TRRS jacks	2	PJ-320A
TRRS cable	1	3.5mm jack cable, with 3 stripes.
Switches	44	Cherry MX for v0.1 and Kailh Choc V1 for v0.2. Ordered from splitkb
Keycaps	44	1U keycaps. Ordered from splitkb.

Flashing the firmware

You will need rust installed so:

curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh

cargo-binutils for stripping unused data from the rust binary and other optimizations:

rustup component add llvm-tools
cargo install cargo-binutils

dfu-util for flashing:

sudo pacman -S dfu-util

add the rust target for the MCU:

rustup target add thumbv7em-none-eabihf

then to compile the firmware:

cargo objcopy --bin yuki --release -- -O binary yuki.bin

for the right board add --features right

to flash enter dfu by holding BOOT clicking RESET and releasing BOOT and enter (can be tricky):

dfu-util -d 0483:df11 -a 0 --dfuse-address 0x08000000:leave -D yuki.bin"

After that to enter dfu just hold button 05 and 33 click reset and release the buttons.

Nix

if you are on NixOS you could use the devShell:

enter the dev shell:

nix develop

and use the flash script that can be found in flash.nix

flash right