Hello friends, I hope you all are doing great. Today, I am going to share our new Arduino Library for Proteus V4.0 . It brings six Arduino boards to Proteus 8 in one library: the Arduino UNO , the Arduino Mega 2560 , the Arduino Mega 1280 , the Arduino Nano , the Arduino Pro Mini and the Arduino Mini . Every board is drawn as the real one, and its LEDs work like the real ones: ON lights with power, L follows pin 13, TX and RX flash with the serial traffic, and the RESET button really holds the chip in reset and then runs the bootloader. This is the fourth version of our Arduino library for Proteus, after V1.0 (2015), V2.0 and V3.0 (2023). The microcontroller is still Proteus's own AVR model, so your sketch, the HEX upload and Proteus's AVR debug windows work as before. What is new is every ...