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Proteus is a popular electronics design automation (EDA) software used for circuit simulation, schematic capture, and PCB design.

A built-in "junior engineer" that understands your schematic context. It provides instant circuit calculations, helps with fault diagnosis, and suggests component data or peripheral configuration code for interfaces like I²C and SPI. proteus 9.1 download

Be aware that downloading and using software from unofficial sources can pose risks to your computer's security and may result in malware infections or other issues. Always use official sources or reputable third-party websites. Proteus is a popular electronics design automation (EDA)