If you like my design maybe consider: 
https://buymeacoffee.com/ironatmmi

This is Part one of the Pocket Radxa Zero 3 W Project.  I will update as soon I have finished the complete build.

The Keyboard:

This is a small keyboard for your Pocket Computer needs. It is mostly printable and the switches are handwired.

For the keyboard software I use Circuit Python with KMK. 

https://circuitpython.org/

https://github.com/KMKfw/kmk_firmware

Example for Pocket Computer Project:

Size is is about 132x58 mm.

Back of the keyboard:

You can also go more creative with the colors:

Building Instructions:

As Keyboard Software I use KMK and the RP2040-Zero Mini Board.

Material Links:

All links are Amazon Affiliate Links:

Switches
EU: https://amzn.to/3J5uL5S
US: https://amzn.to/454z6yP
Cable
EU: https://amzn.to/3J2S9Rw
US: https://amzn.to/45KWalt
SBC RP2040-Zero Mini Development
EU: https://amzn.to/3HiJBp9
US: https://amzn.to/4ooLb9F
Wire
EU: https://amzn.to/46FyDnX
US: https://amzn.to/3UhqUoD
Diodes
EU: https://amzn.to/45luVxs
US: https://amzn.to/4lAWrNL

Keymap: