eSim (previously known as Oscad / FreeEDA) is an open source EDA tool for circuit design, simulation, analysis and PCB design.



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eSim (previously known as Oscad / FreeEDA) is an open source EDA tool for circuit design, simulation, analysis and PCB design.




Cross-platform software for Veroboard (stripboard), Perfboard and simple 1-layer or 2-layer PCBs. Connectivity checking & visualisation. Netlist import. Interactive auto-routing. Component editor. Gerber output, or PDF for toner transfer. Tutorial.



