Use it on your own risk, i'm not responsible for anything wrong that will happen to your RPI Pico for using this script/firmware. If its bricked but bootloader still accessible, you can use FlashNuke.uf2 to reflash your Pico
This handwired mechanical keyboard using Raspberry Pi Pico with RP2040 Chip.
Using CircuitPython platform and KMK Firmware the keyboard can be configure any way you want with multiple layer and also RGB Led/underglow can be added.
This keyboard have 18 button/switch with configuration of 3 row and 6 column.
The Case i'm using are from Thingiverse
Raspberry Pi Pico have 26 free/available port, so you can use 6x18 matrix using 24 port to make full 104/108 key keyboard with 2 spare port for led/encoder. Pi Pico Pinout