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# Corax56: A 56 keys column-staggered fully-wireless split keyboard with scrollwheels.
# Corax: A column-staggered fully-wireless split keyboard with scrollwheels.
- Choc-spaced, hot-swappable
- 56 keys (4 thumb keys, 4 key pinky cluster)
- Two versions: with 45 or 54 keys
- Scrollwheel (EVQWGD001) on both sides
- Strong pinky stagger (0.66) and a 5 deg. pinky splay
- Fully wireless built for Nice!Nano + ZMK (no TRRS Jack)
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![pcb](./images/pcb.jpg)
![top](./images/pcb_render_front.jpg)
## Bill of materials
**Essentials**:
| **Item** | **Count** | **Note** |
|---------------------------------|-----------|----------|
| Keyboard PCB | 2 | |
| Nice!Nano | 2 | |
| 12 pin headers and sockets | 4 | You can use through-hole diode legs as pins. Sockets spacing: 2.54mm, Socket height: Using minimal height sockets might not leave enough room to mount the battery under the MCU. 3DS1002-01-1*20V13-JK by CONNFLY are a good choice, but you can also use lower ones and longer legs instead. Spiltkb has a good [guide on mounting](https://docs.splitkb.com/hc/en-us/articles/360011263059). |
| LiPo battery (301230) | 2 | 110mAh |
| Kailh Choc v1 switches (PG1350) | 56 | |
| Keycaps | 56 | |
| Kailh Choc hotswap sockets | 56 | |
| Encoder EVQWGD001 | 2 | |
| Diodes 1N4148W | 58 | for each key + encoder |
| Buttons | 2 | reset buttons; 2 pins through-hole, tactile, 3x6x4.3mm |
| Slider Switches | 2 | on/off switches; SMD, C128955 |
| USB-C Cable | 1 | for copying the firmware
## Corax56 vs Corax54
**Optional**:
| **Item** | **Count** | **Note** |
|---------------------------------|-----------|----------|
| Nice!View + mounts | 2 | |
| Switchplate | 2 | Height: 1.2mm; either 3d printed or cut pcbs. [stl](./3dprints/switchplate/) |
| Case (Left + Right) | 1 | see [here](./3dprints/case/). |
| Silicone feet | 8 | |
I initially designed the Corax56 (=56 keys) with 4 pinky keys. The upper key (usually mapped to ESC) was placed in a new column because I found it easier to reach horizontally than vertically.
Over the time, I realized that I am not using this button very often. The Corax54 was born as a more compact version where the pinky cluster misses this additonal column and has only 54 keys (2 less). This is the only difference between the two versions.
## Firmware
Only supports ZMK. The firmware repository can be found here: [https://github.com/dnlbauer/corax56-zmk-config](https://github.com/dnlbauer/corax56-zmk-config).
Natively supports [ZMK](https://zmk.dev/).
## Build guide
TODO
## TODO List
- [ ] Use github actions to build + release gerber files.
- [ ] Write a build guide
## Standing on the shoulders of giants
- A great tutorial I referenced a lot by FlatFootFox: https://flatfootfox.com/ergogen-introduction/
- Lots of inspiration and ideas for this project came from these boards: [Choccy](https://github.com/sprengboard/choccy), [Sofle](https://github.com/josefadamcik/SofleKeyboard), [brain](https://github.com/Wesztman/brain), [spleeb](https://github.com/chrishoage/spleeb)
## License
This project is licensed under the MIT License - see the [LICENSE](LICENSE) file for details.