Proteus 9 |link| Site

If you’re just starting with embedded simulation, Proteus 9 remains an excellent tool — but for new designs, consider or alternatives like LTspice (analog) or SimulIDE (lightweight MCU sim).

Proteus 9 is a complete software package for , PCB layout , and microcontroller simulation . Its standout feature is the ability to simulate interactive embedded systems (e.g., Arduino, PIC, AVR, 8051) in real-time, with virtual LEDs, switches, displays, and even serial terminals. proteus 9

With more context, I'll do my best to provide a relevant and accurate response. If you’re just starting with embedded simulation, Proteus