a free and powerful circuit simulator


Click on the pictures to see them in original size.

schematic editor

DC bias shown within the schematic

optical telecommunication system

layout editor for electromagnetic field simulations


interactive formula sheet

running Octave scripts

transmission line calculator (menu: Tools→Line calculation)

component designer (menu: Tools→Domponent Designer)

filter designer (menu: Tools→Filter synthesis)

attenuator designer (menu: Tools→Attenuator synthesis)

PCB layout with KiCAD