Then we will follow the standard approach for simulating the circuit. But Proteus does not have built-in library for Arduino so we have to download the Arduino library for Proteus first. Proteus can also be very efficiently used for simulating the circuits with Arduino development board as the microcontroller. Proteus is a very popular software for simulating the circuit in addition it also provides the flexibility for PCB designing. You will learn how to download the libraries of Arduino for Proteus and simulate the codes build in Arduino IDE on Proteus with additional circuits for example diodes, led, transistors and motors etc. In this projectiot123 tutorial I will discuss how to simulate circuits with Arduinomicrocontroller on Proteus. This Arduino Library for Proteus post we will learn how to Download arduino uno in Proteus.