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corax-keyboard/README.md
2023-07-30 14:02:37 +02:00

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# Project: Build a split keyboard
**⚠ This is still a work-in-progress ⚠**
A 56 keys column-staggered fully-wireless split keyboard with scrollwheels.
## Features
- Choc-spaced, hot-swappable
- 56 keys (4 thumb keys, 4 key pinky cluster)
- 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)
- Nice!View support (5 pin connector)
- Reversible PCB
## Gallery
![kicad image](images/pcb.png)
![prototype](./images/build.jpg)
![top](./images/top.jpg)
![mcu](./images/mcu.jpg)
![front](./images/front.jpg)
![back](./images/back.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
**Optional**:
| **Item** | **Count** | **Note** |
|---------------------------------|-----------|----------|
| Nice!View + mounts | 2 | |
| Switchplate | 2 | Height: 1.2mm; either 3d printed or cut pcbs |
| Silicone feet | 8 | |
## Firmware
Only supports ZMK. The firmware repository can be found here: [https://github.com/dnlbauer/splitkeyboard-zmk-config](https://github.com/dnlbauer/splitkeyboard-zmk-config).
## Build guide
TODO
## TODO List
- [ ] Increase diode-socket distance.
- [ ] Fix MCU pin labels on right-front (Some are mirrored / not on the correct side of the MCU).
- [ ] Give this project a **name**.
- [ ] Design a case.
- [ ] Use github actions to build + release gerber files.