This set contains 2 pieces of PCBs.
Corne Classic v2.0.0 PCBs by foostan
Note: This version doesn’t support hot swap. There are other hotswappable variants. This set does not include components such as diodes and LEDs.
Source files: https://github.com/foostan/crkbd/tree/v2.0/corne-classic
Build guide: https://github.com/foostan/crkbd/blob/c7198121e7a7e6b74706bbce2ddd49835ba360cd/corne-classic/doc/buildguide_en.md
QMK firmware: https://github.com/qmk/qmk_firmware/tree/master/keyboards/crkbd