DIY Split Keyboard
Inexpensive ergonomic DIY split keyboard
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Links
YouTube Demonstration
GitHub Repository
Description
A fully custom ergonomic split keyboard built using three Arduinos. An Arduino Leonardo acts as the master controller, communicating via I2C with two Arduino Pro Micro slave devices - one for each half of the keyboard.
Each keypad has more switches than available input pins. This was solved by wiring the switches as a matrix: Pin 1 of each switch is connected per row, and Pin 2 per column. Scanning each column and reading each row allows 30 switches to be read using only 11 pins per Arduino.
The keyboard also supports an alternative layer, activated by a dedicated shift key, giving access to numbers and symbols without any additional hardware.
Programmed in C++ using PlatformIO in Visual Studio Code.
Technologies Used
- C++
- I2C
- Arduino
- HID Devices
- Button Matrices
Gallery
Switch matrix.
Left keypad.
Right keypad.
Prototype.
