For microcontroller simulation specifically, (online) and SimulIDE (open source) are excellent free alternatives. How to Use Proteus 91 Legally (If You Already Own It) If you purchased a legitimate license for Proteus 91 years ago, you can still download the installer from Labcenter’s legacy archive (requires login with a valid license key). Labcenter allows licensed users to re-download older versions they have paid for.
| Software | Features | Operating System | License | |----------|----------|------------------|---------| | | Excellent analog simulation, no microcontroller support | Windows, macOS, Linux | Freeware | | KiCad | Schematic capture, PCB design, 3D viewer, no simulation | Windows, macOS, Linux | Open Source (GPL) | | Fritzing | Beginner-friendly, breadboard view, limited PCB | Windows, macOS, Linux | Open Source | | EasyEDA | Online/offline, simulation, PCB ordering, huge library | Web, Windows, macOS, Linux | Freemium | | Proteus Demo | Limited save/print, full simulation | Windows only | Free (from Labcenter) | proteus 91 free download
Introduction In the world of electronics design and simulation, few names are as revered as Proteus Design Suite by Labcenter Electronics. For over three decades, Proteus has been the go-to software for students, hobbyists, and professionals who need to design schematics, simulate microcontroller circuits, and design PCB layouts. | Software | Features | Operating System |