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Pica40

by zzeneg · ·

40 keys split

Choc v1 / MX Seeed XIAO socket QMK

Photo of an assembled Pica40
An assembled Pica40, from the project's own README.

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Record 94% complete · 16 of 17 fields

Split keyboard with 40 keys using XIAO controllers.

Layouts

Spec

Shape

Body
split, 2 halves
Split link
TRRS or USB-C cable
Splay
yes
Stagger
column-staggered
Key spacing
MX spacing · 19.05 × 19.05 mm

Switches

Switch footprint
Choc v1, MX
Hotswap
Kailh socket, Gateron socket, 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 (pica40/rev1), QMK (pica40/rev2)
Firmware targets
ATmega32U4, RP2040
Key wiring
— not recorded —
Room for
encoder
Power switch
yes
Exposed components
no

Building it

Build method
PCB
Soldering
SMD, fine-pitch (USB)
SMD required
yes

Licensing

Hardware
GPL-2.0-only
Firmware
GPL-2.0-only
Documentation
GPL-2.0-only

Sources