A hot-swappable, ergo monoblock split keyboard with tenting.
Similar to the Choc version, this keyboard features a 0.8mm PCB with serpentine routing (kerf cuts) near the thumb clusters. These cuts allow the board to flex along the contour of the 3D printed case, forming a 20° tilt and 10° tent from a single PCB.
- Hot-swappable ergo monoblock split in MX spacing
- Built-in tenting (10°) and tilting (20°) from a single FR-4 PCB
- Breakable pinky columns, for 36 or 42-key layouts
- Optional RGB underglow LEDs
| Quantity | Item |
|---|---|
| 1 | Enamel pin badge (Optional) |
| 1 | RP2040-Zero |
| 1 | WeirdFlexButOk-MX PCB |
| 1 | WeirdFlexButOk-MX case & plate |
| 36 (42) | MX Switches |
| 36 (42) | MX Hot-swap sockets |
| 36 (42) | 1N4148SOD-123 diodes |
| 4 | WS2812B LEDs (Optional) |
| 8 | M2x4 heat-set thread inserts |
| 6 | M2x10 standoffs |
| 14 | M2x6 screws |
To place an order for the WeirdFlexButOk-MX PCB:
- Use the Gerber files available in the production/ folder.
- Optionally, the BOM and CPL files can be utilized with a PCBA service. All components, including the RP2040-Zero, are soldered to the bottom side of the board.
Ensure you select the following specifications so the PCB can flex:
- Base Material:
FR4 - PCB Thickness:
0.8mm
The complete PCB design project is available in the kicad/ folder.
Print the case using the provided STL files for the 36-key (3x5) or 42-key (3x6) layout respectively.
I like to start with translucent filament and add a mid-print filament change at around 10mm height to let the LEDs shine through the bottom part. In Cura, this feature can be found under Extensions -> Post Processing -> Modify G-Code -> Add a Script -> Filament Change.
Expect some amount of support material. Tolerances must be tuned for the switches (14.2x14.2mm) to fit properly.
I find the following parameters work best for my print:
- Top/Bottom Speed: 30 mm/s
- Support Structure: Tree
- Fan Speed Override: True
- Support Skin Fan Speed: 100%
Precompiled VIA-enabled firmware:
- Flash penk_weirdflexbutok_mx_default.uf2 to the RP2040-Zero.
- Load the via.json file in
Designtab for VIA configuration.
QMK source is available under firmware/QMK/keyboards/weirdflexbutok_mx.
Copyright (c) 2024 Penk Chen. All rights reserved.
All files are licensed under the MIT license. For more information, see the LICENSE.