1. Place an appropriate source to proceed with transient analysis. Several are in the library tech_ngspice. For the rest: in the side-bar select Component tab, then schematic technology, and click an entry on the Spice component-menu (this is an electric built-in library named spicepartsS3), then click to place it in the schematic. Double-cilck the instance to edit properties.
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2. Make sure frequency, voltage, etc. parameters have proper values
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3.Transient analysis component is present in the tech_ngspice library as dotTRAN.ic. Drag it from side-bar’s Explorer to place in the schematic.
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4. Double-cilck the instance and fill in the timing parameters.
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5. In the toolbar click the SIM button to write ngspice netlist and run the simulation. Launch symprobe on the output rawfile via toolbar wave button.
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