If you work with Proteus Design Suite (from Labcenter Electronics), you already know it’s a powerhouse for schematic capture, simulation, and PCB layout. But the true engine behind its flexibility is the Proteus Library System .

Open Proteus right now, click Library > Pick Device , and type "Arduino." You’ll find a simulation-ready board. Place it, write some code in the source editor, and press play. That is the power of a good library. Do you have a specific component you're trying to find or create in Proteus? Let me know in the comments!

You cannot guess. You need the pinout, physical dimensions (for PCB), and electrical characteristics.