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janus

by skarrmann · ·

34 keys split

MX Seeed XIAO socket QMK

Photo of an assembled janus
An assembled janus, from the project's own README.

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Record 88% complete · 15 of 17 fields

Janus is a small 34 key split ortholinear keyboard, powered by two Seeed XIAO RP2040 with the keyboards halves connected by an ethernet cable.

Layouts

Spec

Shape

Body
split, 2 halves
Split link
Ethernet cable
Splay
— not recorded —
Stagger
— not recorded —
Key spacing
MX spacing · 19.05 × 19.05 mm

Switches

Switch footprint
MX
Hotswap
Mill-Max, or solder the switches in

Electronics

Controller
Seeed XIAO socket
Connectivity
Wireless with a Seeed XIAO nRF52840 (XIAO BLE) — needs a ZMK config
USB port
USB-C, on the dev board
Firmware
QMK (janus)
Firmware targets
RP2040
Key wiring
4×5 matrix per half, column-to-row diodes
Room for
— not recorded —
Power switch
no
Exposed components
yes

Building it

Build method
PCB
Soldering
SMD, hand-solderable (diode)
SMD required
yes

Licensing

Hardware
MIT
Firmware
MIT
Documentation
MIT

Sources