Zephirum is a small ergonomic keyboard designed with LibrePCB, based on the STM32WB55CG USB dongle, and powered by the ZMK firmware.
Design files of this keyboard are licensed under CC0 1.0.
LibrePCB components files to build keyboards
LibrePCB project files for the Zephirum ergonomic keyboard
Sources of the Zephirum keyboard firmware