Hello friends! Today, I am sharing the original Arduino UNO Library for Proteus and explaining how to install it, load a compiled Arduino program and run a simple LED simulation. This library gives us a recognizable UNO board inside the schematic, making it easier to connect circuits using the board's familiar pin labels. We will follow the same practical sequence used throughout our Proteus tutorials: understand the component, install the library, place it in a circuit, prepare the program and observe the result. Along the way, I will explain the difference between the Proteus library files and the firmware that the simulated microcontroller executes. This page documents the original V1.0 library from 2015. The newer version links added in October 2026 are retained below, so you can choos ...