Hello friends, I hope you all are doing great. Today, I am going to share the Arduino Leonardo Library for Proteus . The Leonardo looks like an Arduino UNO, but its ATmega32U4 has USB built into the chip. Plug it into a computer and it is not only a serial port: it can be a USB keyboard and a USB mouse . With this library it runs your Leonardo sketch in Proteus 8.5 - and what it types lands on a PC that the board model plays for you. Updates Arduino Leonardo Library for Proteus Latest version: V1.0 (October 2026, this tutorial) Other new Arduino boards: UNO R4 WiFi · Nano ESP32 · UNO WiFi Rev2 · Nano 33 IoT · UNO Q · UNO R4 Minima · Nano Every · MKR WiFi 1010 · Nano RP2040 Connect · STM32 Black Pill · Nucleo-F401RE · STM32 Blue Pill · Teensy 4.1 · Arduino Due · Arduino Micro · BBC micro:bi ...