Can Arduino make USB devices? Try using the HID function with Arduino Pro Micro (Leonardo)
Make Your Own Custom Shortcut Buttons With an Arduino
8pcs Push Button Switch 4 Keyboard Module key Board Keypad for Arduino DUE Breadboard Leonardo ZERO Tre Micro banana pi Zigbee|switch program|switch stovekeypad rfid - AliExpress
Turn your ProMicro into a USB Keyboard/Mouse - SparkFun Electronics
Overview | Pro Trinket Keyboard | Adafruit Learning System
How to Make a Arduino HID Keyboard : 18 Steps - Instructables
Adafruit 857 Miniature Keyboard- Microcontroller-Friendly PS/2 and USB Arduino, Electronics and Robotics Electan, OnLine Store
Overview | USB NeXT Keyboard with an Arduino Micro | Adafruit Learning System
The Simplest DIY Macro Keypad - Arduino Project Hub
Arduino Micro - OKdo
The Simplest DIY Macro Keypad - Arduino Project Hub
Pro Micro Mini SS Beetle Virtual Keyboard BadUSB ATmega32u4 Module For – diymore