Ngnutmeg difficulty

Discussion in 'General Electronics Chat' started by Swarf Eye, Jul 29, 2010.

  1. Swarf Eye

    Thread Starter New Member

    Jul 29, 2010

    I'm trying to get up and running with the gEDA package. I've got more or less everything running and I'm able to use it reasonably well... except for ngnutmeg.

    I've used LTspice a bunch, but I really want to get away from Windows and on to open source.

    I can get gnetlist to make what appears to be a fine net file, and ngspice runs without complaint.

    The issue is that I am unable to get a meaningful graph out of ngnutmeg... and I don't seem to be able to find much of any documentation on how to use it online.

    Can anyone point me in the right direction?

    Thanks so much,

  2. JDT

    Well-Known Member

    Feb 12, 2009
  3. bertus


    Apr 5, 2008
  4. Swarf Eye

    Thread Starter New Member

    Jul 29, 2010
    Yeah, thanks.

    I've got those documents.

    I guess that my troubles are not just ngnutmeg... but I'm a touch confused right now.

    At this point I'm trying to take a simple sine wave voltage source and put it into a simple voltage divider (two series 10k resistors). Then I'm trying to plot the voltage at the top of the voltage divider and then in the middle of the voltage divider. Seems like about the simplest try I can make at this point! And I'm stumped.

    Here is what I've got...

    Code ( (Unknown Language)):
    2. example simpleTest
    3. v1 1 0 ac 10 sin( 5 10 1000)
    4. r1 1 2 10k
    5. r2 2 0 10k
    6. .op
    7. .tran 1ms 10ms
    8. .plot tran v(1,2)
    9. .end
    I think I ought to just be able to run...

    ngspice simpleTest.cir

    ...and see a plot pop up??? No Love.

    Any suggestions?


  5. tom66

    Senior Member

    May 9, 2009
    I think ngspice produces a plot file which you use xplot to plot with.

    Which OS? I assume it's a Linux of some kind. I use the whole gEDA package, but I use LTspice a lot as well in VirtualBox, and MPLAB, because those programs don't work well in Wine and there are few and far between Linux equivalents.