How to Build a Custom Split Mechanical Keyboard with Arduino and 3D‑Printed Parts

This tutorial walks you through designing, wiring, coding, and 3D‑printing a split mechanical keyboard using an Arduino Leonardo, matrix scanning, diodes for key‑ghosting prevention, and custom keycaps, providing a complete DIY solution for programmers seeking ergonomic, programmable keyboards.

3D printingArduinoDIY keyboard

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How to Build a Custom Split Mechanical Keyboard with Arduino and 3D‑Printed Parts