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The cheapest macropad DIY’ed

I recently challenged myself to build the world’s cheapest macropad with the RPI Pico and QMK. I successfully achieved it. But it had its own downsides.

The components I used include:

PartsQty
Raspberry Pi Pico-H1
1N4007 diodes6
1.2*1.2 mm push switches6
3D Printed enclosure, parts3
M3 Screws, brass inserts3
USB cable1

The circuit is rather simple. (21,22,27 clmns 19,18 rows) Connect the switches with a diode to each switch similar to other builds. Then connect the rows and columns like given below.

Row/columnpin (as on pi)
c121
c222
c327
r118
r219

Finally print all of the files as given below and then flash the QMK firmware that can be downloaded for the pi below.

Firmware-Download the .uf2 file

Some Pictures:

3D files:


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