On Wed, Oct 30, 2019 at 6:42 PM Holger Vogt <[email protected]> wrote: > > The current eeschema-ngspice interface is very limited.
Are there any plans or roadmap for improving it? > > How would one plot, for example, the difference between two vectors? > > I tried this in a text box: > > > > .save foo=(‘v(/input)-v(/output2)’) > > .tran 10u 50m > > > > but "foo" does not show up in the list of vectors to display in the plot > > window. > > Here you might have a look at > https://forum.kicad.info/t/spice-plotting-difference-of-voltages/19545/2 Thanks! Also I found this way: I added a symbol and a dummy resistor, setting the symbols Spice_Primitive and Value such that I get this in the netlist: BV1 /diff GND V=V(/input,/output) Rdummy1 NC_03 /diff 1g "V(/diff)" then shows up in the kicad plot menu. This also work for other operations than diffing, for example BV2 /mul GND V=V(/input)*V(/output)/100 It would be nice if one could simply append stuff to the netlist in a textblock, is this possible? > > Another thing, I found that one can use parameters for values, for > > example {Rx} for a resistor value and then add a textbox with ".param > > Rx=100k". Would it be possible to simultaneous get plots for a set of > > different values of Rx? > > > > Here you might try external ngspice. KiCad 5.1.x has a direct > interface, where you generate a netlist from your circuit and then may > call ngspice. This will offer the full ngspice capabilities and plotting > via ngspice or gnuplot. I have described an example at > http://ngspice.sourceforge.net/ngspice-eeschema.html#external . > > Unfortunately this interface has disappeared in KiCad 5.9.9 . I still > will have to make a wish list bug report to get this back. Is this supposed to work on macOS as well? I downloaded the ngspice package but the binary fails to run: $ ./ngspice dyld: Library not loaded: /opt/X11/lib/libXaw.7.dylib Referenced from: /Applications/ngspice/bin/./ngspice Reason: image not found Abort trap: 6 -- /Jonatan http://kymatica.com _______________________________________________ Mailing list: https://launchpad.net/~kicad-developers Post to : [email protected] Unsubscribe : https://launchpad.net/~kicad-developers More help : https://help.launchpad.net/ListHelp
