Qucs: A circuit simulator
Launch Qucs: Applications --> Electronics --> Qucs.
Qucs presents a window subdivided in two sections. The main section is an area that houses Schematic (design window) where you place your electrical components, and Data Display (simulation window), where you visualize the analytical results. The other section, on the left, has three visualizations mode: Components, Contents and Projects. In the Components view, you can navigate between various categories, selecting the drop-down list at the top of its window. If you need a DC Voltage source, select source; a Resistor, Capacitor or Inductance, select lumped components; a diode or a transistor non-linear components. So if you work in the G-Hz range or u-wave frequencies, select Trasmission-Lines.
