Arduino Macro Keyboard

DIY Macro Keyboard using an Arduino Pro Micro, 3D printed parts and some other hardware modules.

Features

• Arduino Pro Micro as HID device
• 8 configurable keyboard switches and 1 rotary encoder
• Independent profiles for keys and encoder
• Touch sensor to detect interaction
• A ws2812b LED module lights-up the pad upon profile changes and when the touch sensor is touched
• OLED display to show usage info
• Menu Button (placed below the OLED display) with key-test playground

Arduino sketch

Find it at ./sketch/pro-micro_dentex_macro-keyboard.ino.

Libraries used:

• HID-Project
• EEPROM
• Adafruit_NeoPixel
• SSD1306Ascii
• Keypad

3D printed parts

Printable STL files are available in the relative folder. The ./FreeCAD folder contains the 3D project (the main file to be loaded in FreeCAD is #_MACRO-KEYBOARD_v12.FCStd)

Hardware

• 1 Arduino Pro Micro
• 8 Cherry MX switches (or similar/compatible, i.e.: https://www.aliexpress.com/item/4001111706889.html)
• 8 Keycaps (4xR1 and 4xR2: https://www.aliexpress.com/item/33056163268.html)
• 1 Rotary Encoder (I used a KY_040 module, it should be this one: https://www.aliexpress.com/item/32726570531.html)
• 6 short M3 hexagonal screws
• 6 M3X4.6X4.0 Brass Insert Nuts (i.e.: https://www.aliexpress.com/item/4000688990203.html)
• 1 6x6x5mm tactile mini switch (i.e.: https://www.aliexpress.com/item/1005003536610720.html)
• 1 3mm LED (indicates the encoder's ticking)
• 1 Addressable LED module (i.e.: https://www.aliexpress.com/item/32851699524.html)
• 1 I2C OLED Display Module (i.e.: https://fr.aliexpress.com/item/32584349265.html type 0.96 white)
• 1 TTP223 Capacitive Touch Switch Module(i.e.: https://www.aliexpress.com/item/32869836574.html)

Wiring

A partial connection diagram is present into the ./images folder. It covers the keyboard and the rotary encoder. For the other connections, rely on the Arduino sketch and the arduino pinout.