This is a Corne Cherry v4.1 designed by foostan, with all necessary components, including LEDs, mounted on the PCBA. Corrections for polarity and misalignment were made before ordering. Operation has been confirmed. ※ I found this board while cleaning up at the end of the year. This is only one left-hand side. I flashed the VIAL firmware and confirmed key input. I was also able to confirm that it can connect to the right side by connecting a TRRS cable. Please use it if only the left side has failed. The first LED is physically detached, so the LEDs will not light up. For those who want everything including the case, we recommend purchasing the official kit, which is of high quality. This is just the PCB, so it is recommended for those who can prepare other parts themselves, or those who have a 3D printer. If necessary, plates and cases can also be included. By flashing the VIA firmware, you can also edit the keymap with Remap. Since it's only one side, it can also be used as a (left-hand device) or a one-handed device. It can be used with the case data available on github. If you don't use a rotary encoder, you can use it as is, without soldering. ⚪︎ Top plate ⚪︎ Bottom case ⚪︎ Screws ⚪︎ Spacers ⚪︎ MX switches ⚪︎ Keycaps are required in addition to this. You can use it by flashing the firmware on github. (Just drag and drop the uf2 file. It's in the docs) If you wish, I can also flash the firmware for you, but the firmware is different for mini (3x5 column) Please note that the top plate and case are not compatible with corne v3 or earlier! corne v4 cherry keyball 39 44 61 DIY keyboard Split keyboard Mechanical keyboard Hot-swap Copyright (c) 2023 foostan Released under the MIT license https://github.com/foostan/crkbd