The PCB uses MX-style switches with PCB mounting and hotswap. The MCU(microcontroller - the device that tells the computer whenever you press a key) is a basic Pi Pico RP2040/RP2350.
My current keyboard(Keychron K6 from #pyramid-scheme) has no function key row, and requires an uncomfortable combo to pause music. To fix this, I made Obsidian One which has the extra row.
The PCB is in the /keyboard folder. Inside is the production folder, which includes the gerber file.
In the /firmware/kmk folder, you'll find a CIRCUITPY folder showing exactly what your MCU should look like when you plug it in. First, flash micropython. You can find instructions on how to do that here. Then, eject, unplug, and reconnect the MCU. Once you're done, it should appear as a usb drive named CIRCUITPY. Now, replace the contents of the drive/mcu with the items in the /firmware/kmk/CIRCUITPY directory. Upon restarting(unplugging + reconnecting) the MCU, it should be functioning properly.
NOTE: This KMK firmware hasn't been tested. Flashing it to your microcontroller may cause damage or render it incapable of function. Use it at your own risk.
The QMK firmware was made with QMK Configurator. It made a .hex file and I used microsoft's uf2conv.py and uf2families.json to convert it to a .uf2 file, which can be flashed to the MCU. You can see it at /firmware/qmk.
NOTE: This QMK firmware hasn't been tested. Flashing it to your microcontroller may cause damage or render it incapable of function. Use it at your own risk.
The case is available at ./case
| Quantity | Item | Notes/Details | Source |
|---|---|---|---|
| 84x | Kailh Hotswap Sockets | https://www.aliexpress.us/item/3256804104247622.html?gatewayAdapt=glo2usa | |
| 84x | MX-compatible switches | MMD Princess Tactile 48gs | Amazon - https://www.amazon.com/KPREPUBLIC-Princess-Tactile-Mechanical-Keyboard/dp/B0C533FYXJ?sr=8-1 |
| 84x | Compatible keycaps | Amazon | |
| 84x | 1N4148 THT Diodes | https://www.aliexpress.us/item/2255800939822415.html?gatewayAdapt=glo2usa | |
| 2x 2u, 1x 6.25u | Stabilizers | Cherry-style | CannonKeys |
| 1x | Orpheus Pico | Controller board | Hack Club HQ |
| 1x | Case | 3D-printed or purchased enclosure | JLCPCB/#printing-legion |
| 1x | PCB | Custom-designed for this project | JLCPCB |
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Solder
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Soldering Iron
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Flux as needed
