7.7 Sp2 Portable [best] — Proteus

Released as a refined iteration of the Proteus 7 series, SP2 (Service Pack 2) introduced several enhancements that solidified its reputation:

This is the environment where you draw circuit diagrams. It includes a massive library of over 15 million components and allows for real-time simulation. Proteus 7.7 SP2 Portable

It combines the power of SPICE-based circuit simulation with the ability to simulate digital components and microprocessors in a single environment. Benefits of the Portable Version Released as a refined iteration of the Proteus