Imported from GitHub: Vaarai/Cornia · commit cebf509 · license GPL-2.0
Description
Cornia is a split keyboard with 3x6 column strongly staggered keys and 3 thumb keys
README
Cornia keyboard
The Cornia keyboard is a split keyboard featuring :
- 3x6 column strongly staggered keys and 3 thumb keys
- Hotswap sockets (Compatible with Kailh and Gateron)
- All 1u keys
- Same PCB for both hands (revesible)
- No diode to solder (No switch matrix)
- Per key adressable RGB leds (SK6812MINI-E)
- QMK Handedness pin (see QMK documentation)
Why this name ?
Because it was inspired from the Corne keyboard, and Cornia came in mind.
Table of contents
Quick steps
Hardware
Bill of material
| Name | Count | Remarks |
|---|---|---|
| PCB | 2 | PCB Ordering guide |
| OLED Display | 2 | |
| RP2040 ProMicro | 2 | Alternative: Refer to Compatible controllers |
| TRRS 3.5mm jack | 2 | Ref: PJ-320A |
| Reset switch | 2 | SMD 4x4mm |
| I²C Pull-up resistors | 2 | 0805 form-factor and any value between 2.2kΩ and 4.7kΩ |
| Handedness Pull-up/down resistor | 1 | 0805 form-factor and any value between 2.2kΩ and 4.7kΩ |
| Hotswap sockets | 42 | Compatible with Kailh and Gateron |
| Key switches | 42 | Only compatible with MX style |
| Keycaps | 42 | 1u size |
| TRRS (4 poles) cable | 1 | |
| USB cable | 1 | USB Micro or USB-C depending on the controller, avoid charge-only cables |
| Case | 2 | Cornia v1 Printables |
Compatible controllers
| Reference | I²C OLED Display | Handedness pin | Other features |
|---|---|---|---|
| RP2040 Aliexpress | $${\color{green}✓}$$ | $${\color{green}✓}$$ | $${\color{green}✓}$$ |
| RP2040 keeb.io | $${\color{green}✓}$$ | $${\color{green}✓}$$ | $${\color{green}✓}$$ |
| 0xCB-Helios | $${\color{green}✓}$$ | $${\color{green}✓}$$ | $${\color{green}✓}$$ |
| Elite-Pi | $${\color{red}⨯}$$ | $${\color{red}⨯}$$ | $${\color{green}✓}$$ |
| RP Micro | $${\color{red}⨯}$$ | $${\color{red}⨯}$$ | $${\color{green}✓}$$ |
PCB design and manufacturing
Schematic and PCB views are available in pdf/:
To manufacture the Cornia PCB please follow the PCB manufacturing guide
In case you want to modify the PCB please take a look at the following:
- KiCad project description
- Export bash script to ease the process, it is documented in Manufacturing files export guide
Keyboard assembling
To solder and assemble the Cornia keyboard please follow the Cornia assembly guide
Troubleshooting
Software
Cornia keyboard firmware is based on QMK.
Cornia not yet integrated in official QMK ?
If Cornia keyboard not yet integrated in qmk_firmware you can go to Vaarai QMK fork on and follow the readme.
Keymap
- Default QWERTY layout for Cornia keyboard
- Fire layout for Cornia keyboard (Based on Fire (Oxey) layout)
Case
Case for Cornia v1 is available on Cornia v1 Printables from user Rikiki, optionally including a trackpad version (40mm) available for both halves.
Cornia keyboard is a project initiated by a post from help-forum on QMK Discord.
User Rikiki requested in this post if someone could alter crkbd PCB to match his requirements.
I (Vaarai) replied to this post and in 1 months we made 2 iterations of crkbd variant and it diverged from crkbd in a way that we started to make a new keyboard and 5 months later it lead to the Cornia.
Rikiki made all the mechanical parts and I designed the PCB then developed a QMK implementation.
Photos
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