4x4 Macropad using KMK firmware and the Seeed studio XIAO rp2040

Thank you for checking out my build! ❤️

Not as important:

Project is set up and designed for JLC-PCB services

Necessary items you need to build this thing

• MX-style switches ( i used gateron EF silent yellow x 16 )

• 1N4148 diodes x 16

• 2.54mm female headers for attaching the XIAO

• Main PCB

• (Not really necessary but the 3d printed case is recomended)

• Seeed studio XIAO rp2040

• Usb-C cable for connecting to xiao

How do i install the files?

Step 1 :

Download Adafruit's CircuitPython V9.27

https://adafruit-circuit-python.s3.amazonaws.com/bin/seeeduino_xiao_rp2040/en_US/adafruit-circuitpython-seeeduino_xiao_rp2040-en_US-9.2.7.uf2

Step 2 :

Hold the BOOT button on the XIAO rp2040 before plugging it into your computer using a USB-C cable ; RPI-RP2 should appear.

Step 3 :

Drag and drop the "adafruit-circuitpython-seeeduino_xiao_rp2040-en_US-9.2.7.uf2" file onto the RPI-RP2 folder. The folder should disappear and then reappear as "CIRCUITPY" within a few seconds after copying.

Step 4 :

install KMK from https://github.com/KMKfw/kmk_firmware/tree/main

Drag the "kmk" folder and "boot.py" file onto the root folder (same path that main.py is on)

Files should look something like this

Assembly time!

Step 1 :

Solder the diodes as the pcb shows

(They ensure that each keypress is registered individually, even if you press multiple buttons at once, good to have them!)

Step 2 :

Solder the 2.54 mm female headers

You don't need these but they are nice to have if your xiao breaks.

Step 3 :

Solder the MX switches onto the pcb, the 5 pin version of the switches was used on this project

Step 4 :

Install the PCB on the bottom shell

Step 5 :

Install the XIAO into the headers, or don't... ( the thing won't work but that's not really my problem :D )

Step 6 :

Pop on the top shell and keycaps.

Wow, you're done!

Pcbs One view of the board Another view because why not

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Some information about V2 coming in the future

I decided that I wasn't 100% happy with my macropad, don't get me wrong, it works great but I just feel like there's some things that could be better:

• Backlight

• Screws for the case

• Tactile or other clicky switches

• Wireless capabilities

Support me! 👇

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If you are Swedish and check out my build then you can use Swish to support me, send however much or little you want!