hardware

macropad

jan 2026

a mechanical keypad designed from the copper up.

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highlights

2-layer pcb in kicad around a seeed xiao rp2040 - i2c oled and daisy-chained addressable rgb.
custom snap-fit enclosure in fusion 360, toleranced for fdm printing around switches and encoders.
kmk firmware handling matrix scanning, encoder interrupts, and live oled layer visualization.