Low-profile split keyboard with 36 keys using XIAO controllers.
Pica pica - european (common) magpie
- reversible PCB
- 36 soldered ChocV1 keys
- wired/wireless versions
- top pinky key moved to side
- 3D printed case
- XIAO RP 2040 controller
- QMK firmware
- TRRS or USB-C connection between halves
- rotary encoder on one side
- one status LED
- XIAO BLE controller
- [TODO] ZMK firmware
- rotary encoder on both sides (ZMK supports only main side for now)
- on/off toggle
- battery connectors
wired version with 3d printed case
build process
battery compartment
- QMK - my fork, compiled file
- Vial - my fork, compiled file
- [TODO] ZMK
Updated wired cases render:
- Wired - Left, left without encoder hole, right, right without encoder hole
- Wireless - with battery compartment and encoder holes - left, right
- [Experimental] Knob for low profile rotary encoder
- PCBs
- 3D printed case
- 2 XIAO MCUs - RP2040 for wired version, nRF52840 for wireless
- 36 Choc V1 switches
- 36 SMD SOD-123 1N4148 diodes
- 1 or 2 EC11/12 rotary encoder with knob, low profile is recommended
- [Wired only] 2x USB-C 16pin connector and TRRS jack
- [Wired only] USB-C or TRRS cable
- [Wireless only] 2x Li-Ion 3.7V battery (battery compartment suited for 5×12×21 size)
- [Wireless only] 2x on/off toggle MSK-12C02
TODO
Similar to all other keyboards. Main points:
- solder diodes on top side
- solder jumpers - choose wired or wireless on both sides
- for wired version only - solder "no enc" jumper on the side that does not have encoder
- for wireless version only - solder on/off switch on top side
- if you want USB-C connection, I recommend to solder both TRRS and USB-C to have a backup option, better safe than sorry. Check USB-C pins with multimeter for shorts/continuity, test that encoder works (it uses connection between splits)
- flash your MCUs with a firmware that supports bootmagic/QK_BOOT/&reset functions
- triple check all keys with tweezers
For proper KiCad setup install my zzkeeb library.