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:
|Raspberry Pi Pico-H||1|
|1.2*1.2 mm push switches||6|
|3D Printed enclosure, parts||3|
|M3 Screws, brass inserts||3|
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/column||pin (as on pi)|
Finally print all of the files as given below and then flash the QMK firmware that can be downloaded for the pi below.
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