that allows you to explore all the tools. It is time-limited for simulations and doesn't allow saving, but it’s the best way to learn the ropes legally. Academic Licensing:

Instead of searching for illegal "portable" versions, here are legitimate ways to use Proteus for free or at a low cost:

Digital Sound Factory, founded by a former E-Mu sound designer, owns the license to the original E-Mu Proteus sound libraries. They periodically offer free sample packs or introductory versions of the Proteus packs. These are formatted for modern, free players like SoundFont players or Native Instruments Kontakt Player. 2. Free SoundFont (.SF2) Player Setups

are often listed as "alternatives" in general software searches, they are project management tools and won't help you design a circuit board. For actual PCB design, Proteus stands out because of its integrated SPICE simulation

Proteus Portable 88 Free [work] -

that allows you to explore all the tools. It is time-limited for simulations and doesn't allow saving, but it’s the best way to learn the ropes legally. Academic Licensing:

Instead of searching for illegal "portable" versions, here are legitimate ways to use Proteus for free or at a low cost: proteus portable 88 free