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Flexible simulation

Discussion in 'Electronic Design' started by John Beardmore, Feb 28, 2004.

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  1. Is there a free spice or something that I might be able to use to
    simulate an analogue circuit with a 10 op-amps, a 555, 4017, high and
    low side switches and a few relays.

    Graphical interface preferred. What I'd like to be able to do is enter
    the design then study the effect of changing some of the control voltage
    inputs.


    Cheers, J/.
     
  2. Fred Bloggs

    Fred Bloggs Guest

    It seems rather remarkable that you are so experientially crippled as to
    post this query in light of all the lying about excessively pervasive
    credentials to do this sort of analysis.
     
  3. See my notes and links to some 60 ECAD programs at
    http://www.terrypin.dial.pipex.com/ECADList.html
    which includes several free or inexpensive programs with Spice
    capabilities.

    I've been a user of CircuitMaker for a long time, and there is a free
    student version of that.

    LTSpice's versatile SWCADII is highly regarded by many, and that is
    free.

    Also, a google on 'simple free Spice program' gave me 99,200 'hits',
    some of which I expect would repay pursuit.


    Terry Pinnell
    Hobbyist, West Sussex, UK
     
  4. Chaos Master

    Chaos Master Guest

    I met John Beardmore , in sci.electronics.design at the date of Sat, 28 Feb 2004
    13:46:20 +0000, when we had ideas of posting and reading in the article
    LTspice www.linear.com/ltspice and model for 4017 is avaliable at
    http://groups.yahoo.com/group/LTSpice (register. it's a good forum).

    --
    by Chaos Master® - MSN:

    "A Elbereth Gilthoniel, silivren penna miriel o menel aglar elenath!
    Na-chaered palan-diriel o galadhremmin ennorath,
    Fanuilos, le linnathon nef aear, si nef aearon!" - The Lord of the Rings

    Linux User #327480 / GNU-Win32 / Cygwin / Win98 + LiteStep
     
  5. It seems rather remarkable that you are so emotionally crippled as to
    post this response.

    If you have nothing to contribute, why reply ?

    I don't recall posting any credentials to do this project. Do you even
    know what the project is ?

    For what it's worth, it's largely done now, but reflecting on the
    experience, it seems some time might have been saved by modeling it all
    up front. This is more about saving effort next time around.

    I last tried to use spice as a character app in about 1988. Wasn't much
    fun, and it didn't save me any time. Thought things might be different
    now.

    If these thoughts amount to being "experientially crippled", I trust
    you'll be giving us the satisfaction of an answer which demonstrates the
    balm of your own virtue, knowledge and experience ?

    Or maybe not ? Your call.


    Cheers, J/.
     
  6. Yup, that's the one to go for. Look no further. It comes with a good
    range of precisely the type of devices you're wanting to experiment
    with/on, too.
     
  7. Fred Bloggs

    Fred Bloggs Guest

    There's no such thing as SPICE without "graphical schematic entry"
    anymore- only someone from the stone ages would ask that. And yes - I
    know that your project is analog simulation of a thermal model for a
    house- you are into solar retrofit and proselytizing and that is your
    main business. The most full-featured free version of SPICE- and that
    *IS* free as in beer and not free as in freedom- is the SWCAD free
    download from Linear Technology hhtp://www.linear.com . There are many
    others with free demo's and student versions but you run into any one of
    several restrictions such as no save capability or printout, severely
    limited device model libraries, limited circuit complexity, and maybe
    some other things. SWCAD has none of that, and it is easy to come up to
    speed with it- not intuitive but simple nonetheless.
     
  8. Chaos Master

    Chaos Master Guest

    I met Fred Bloggs , in sci.electronics.design at the date of Sat, 28 Feb 2004
    19:18:36 GMT, when we had ideas of posting and reading in the article
    SPICE without a graphical schematic entry ***IS*** still avaliable.
    E.g. SPICE OPUS and WinSpice.


    --
    by Chaos Master® - MSN:

    "A Elbereth Gilthoniel, silivren penna miriel o menel aglar elenath!
    Na-chaered palan-diriel o galadhremmin ennorath,
    Fanuilos, le linnathon nef aear, si nef aearon!" - The Lord of the Rings

    Linux User #327480 / GNU-Win32 / Cygwin / Win98 + LiteStep
     
  9. Fred Bloggs

    Fred Bloggs Guest

    SPICE OPUS is minimal effort freeware-WinSPICE is a "work in progress"
    and lo and behold he aspires to add schematic entry. You need to get a life.
     
  10. Active8

    Active8 Guest

    Roofing material and insulation? Wow! Mike must be working overtime
    ;) Just yesterday I was perusing a free Mech E CAD site with FEM
    for thermal analysis.

    http://www.freebyte.com/cad/fea.htm
     
  11. Well, as I say, it's not a thing I've looked at in a long time.

    ROFL !

    OK, thanks !


    Cheers, J/.
     
  12. Indeed WinSpice has had that statment for at least the last 5 years.

    I will point out though:)

    The SuperSpice demo can do pretty big real circuits. You can place 30
    blocks with each block referring a separate hieratical schematic. Each
    schematic block can have 25 components meaning that you have around 750
    real devices.

    Kevin Aylward

    http://www.anasoft.co.uk
    SuperSpice, a very affordable Mixed-Mode
    Windows Simulator with Schematic Capture,
    Waveform Display, FFT's and Filter Design.

    http://www.anasoft.co.uk/NewBeginning.mp3

    "quotes with no meaning, are meaningless" - Kevin Aylward.
     
  13. Fred Bloggs

    Fred Bloggs Guest

    Does your demo have a reasonably representative model library?
     
  14. So in which respects is it crippled, then, Kev? And how much wonga
    does one have to part with to acquire the fully-featured version?
     
  15. The only limit in the demo is the aforementioned 30 top level
    components/blocks with one level of hierarchy with each block having a
    run/save limit of 25. Everything else is fully enabled.
    See the pricing page :)

    Kevin Aylward

    http://www.anasoft.co.uk
    SuperSpice, a very affordable Mixed-Mode
    Windows Simulator with Schematic Capture,
    Waveform Display, FFT's and Filter Design.

    http://www.anasoft.co.uk/NewBeginning.mp3

    "quotes with no meaning, are meaningless" - Kevin Aylward.
     
  16. Depends on what you mean by "reasonable":)

    However, adding models is piss easy. Drag drop the model file and your
    done. e.g. if its an opamp, place any opamp symbol and double-click it
    to popup its properties, you can then click navigate to attach a new
    model to it. For standard spice devices like bipolar and fets etc, you
    don't have to do anything. It automatically attaches the correct symbols
    to them.

    Kevin Aylward

    http://www.anasoft.co.uk
    SuperSpice, a very affordable Mixed-Mode
    Windows Simulator with Schematic Capture,
    Waveform Display, FFT's and Filter Design.

    http://www.anasoft.co.uk/NewBeginning.mp3

    "quotes with no meaning, are meaningless" - Kevin Aylward.
     
  17. I think you mean <http://www.linear-tech.com>.
     
  18. Active8

    Active8 Guest

    The only limit in the demo is the aforementioned 30 top level
    components/blocks with one level of hierarchy with each block having a
    run/save limit of 25. Everything else is fully enabled.
    See the pricing page :)[/QUOTE]

    no shit :)

    You're looking at a good deal AFAIK. Granted, you'll have to
    recapture into Eagle to do your PCB (or will you?), but the Spice
    netlist can be dropped into LTSpice.

    When you consider the price of Circuit Maker Pro (more like circuit
    "breaker", with absolute zero support) or Electronics Jerkoffbench,
    SS is almost a steal. I won't even get into those cockbreaths from
    [totally] Mental [fuckstory] Automation.
     
  19. Fred Bloggs

    Fred Bloggs Guest

  20. no shit :)

    You're looking at a good deal AFAIK. Granted, you'll have to
    recapture into Eagle to do your PCB (or will you?),[/QUOTE]

    Possibly, although SS can output some main PCB formatted netlists. It
    just dosnt have all the misc. pcb symols. You need to make them.

    but the Spice
    Yes, so long as it doesn't use any xspice devices. There are also a few
    of my add-ons. For example, I extended the diode model so that each
    instance of the same diode can have an independent breakdown voltage.
    This can be more convenient for using as zeners.
    I am still at a loss as to why some of the other packages exist at all.
    Most are completely unusable. I find EWB one of the main offenders. Its
    is a nightmare to actually plot signals.

    Kevin Aylward

    http://www.anasoft.co.uk
    SuperSpice, a very affordable Mixed-Mode
    Windows Simulator with Schematic Capture,
    Waveform Display, FFT's and Filter Design.

    http://www.anasoft.co.uk/NewBeginning.mp3

    "quotes with no meaning, are meaningless" - Kevin Aylward.
     
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