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google/mozc-devices
Circuit diagrams and firmware source code for Gboard DIY keyboards

Cornia is a split keyboard with 3x6 column strongly staggered keys and 3 thumb keys
Cornia is an open-source printed circuit board by Vaarai, from the Vaarai/Cornia repository on GitHub, published under the GPL-2.0 licence. It is a 2-layer board of 159.2 × 104.5 mm with 78 parts on 59 nets, routed with 961 tracks and 482 vias.
It is built around the SK6812MINI-E. Its parts include 21 switches, 21 inductors, 6 resistors, 2 ICs and 1 capacitor. It belongs with the keyboards and input boards and the RP2040 and AVR (ATmega, ATtiny) boards of this library.
This KiCad project is designed for the Cornia keyboard PCB
| Qty | Value | Footprint | References |
|---|---|---|---|
| 21 | SK6812MINI | cornia-footprints:YS-SK6812MINI-E | L1, L2, L3, L4, L10, L11, L12, L13, L14, L15, L16, L17, L18, L19, L20, L21 +5 |
| 21 | SW_Push | cornia-footprints:keyswitch_cherrymx_hotswap_reversible_1u | SW1, SW2, SW3, SW4, SW10, SW11, SW12, SW13, SW14, SW15, SW16, SW17, SW18, SW19, SW20, SW21 +5 |
| 10 | Hole | cornia-footprints:MountingHole_2.2mm_M2_no_annular | H1, H2, H3, H4, H5, H6, H7, H8, H9, H10 |
| 8 | SB | cornia-footprints:SolderJumper-2_Open_NoSilk | SB4, SB5, SB6, SB7, SB8, SB9, SB10, SB11 |
| 6 | 2.2k | cornia-footprints:R_0805 | R1, R2, R3, R4, R5, R6 |
| 2 | SB | cornia-footprints:SolderJumper-2_Bridged | SB1, SB3 |
| 2 | SW_RST | cornia-footprints:SW_SMD_4x4mm | RST_L1, RST_R1 |
| 2 | SolderJumper_3_Open | cornia-footprints:SolderJumper-3_I2C | SB12, SB13 |
| 1 | 1uF | cornia-footprints:C_0805 | C1 |
| 1 | Conn_01x01_Pin | cornia-footprints:1Pin | J1 |
| 1 | OLED | cornia-footprints:OLED | OL1 |
| 1 | RP2040-ProMicro | cornia-footprints:RP2040-ProMicro | U1 |
| 1 | SB | cornia-footprints:SolderJumper-2_Open | SB2 |
| 1 | TRRS | cornia-footprints:TRRS_PJ-320A | U2 |
It measures 159.2 × 104.5 mm and has 2 copper layers, 1.6 mm thick.
78 parts, built around the SK6812MINI-E. 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.
From the Vaarai/Cornia repository on GitHub, at the commit this page was made from: the board is PCB/cornia.kicad_pcb and its schematic PCB/cornia.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Its repository publishes it under the GPL-2.0 licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).

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Circuit diagrams and firmware source code for Gboard DIY keyboards

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