One Software to simulate circuit behaviour

Discussion in 'Electronics Resources' started by mikeysela, Nov 20, 2010.

  1. mikeysela

    Thread Starter Member

    Jul 24, 2010
    87
    1
    Hi guys,

    I am interested in simulating circuits and their behaviour before i build them. It seems there are so many options out there, and im not sure what software does what I want. I want to be able to put any component that may not be in the software's library, and maybe define its specs and then use it for simulation. I.e I would like to add an arduino Uno board as a component in the schematic and then see how it interacts with external circuitry. also, I would like to add the external circuitry using the exact manufacturer parts i will be purchasing

    Is there any software that can do that? I already have orcad, is that sort of the ultimate software for this?

    Thanks guys
     
  2. Paulo540

    Member

    Nov 23, 2009
    188
    0
    PADS and it's companion software by Mentor Graphics has a lot of tools related to this.

    I think it's one of those things that if you ask 10 people, you'll get 15 different answers tho.
     
  3. thatoneguy

    AAC Fanatic!

    Feb 19, 2009
    6,357
    718
    LTSpice is very common on this forum for exchanging schematic and showing results.

    I use both LT Spice and Multisim, I'd suggest trying both the student version of Multisim and LT Spice as well as OrCAD and other suggestions that will show up here, decide which one you can work with best, and stay with it.
     
  4. mikeysela

    Thread Starter Member

    Jul 24, 2010
    87
    1
    May I ask why the student version? thank you
     
  5. thatoneguy

    AAC Fanatic!

    Feb 19, 2009
    6,357
    718
    The pro version costs over $2,000 is about the only reason I suggested the limited version.
     
  6. maxpower097

    Well-Known Member

    Feb 20, 2009
    795
    388
    Student version is $40, Educational Ver $500, Enterprise edition $2000. Reminds me of those old Brothel signs
    Shave - $0.05
    Deluxe Shave - $4
     
  7. krypt0n

    New Member

    Mar 8, 2011
    6
    0
  8. JStitzlein

    Member

    Dec 6, 2010
    53
    0
    i just switched to LTspice from orcad.

    It took me a week to get used to the way you draw circuits in ltspice, but it was well worth the switch.

    probing/graphing results is the major difference for me. generating multiple plots of anything is such a breeze.

    the way i do a bode plot in orcad is by first adding a trace, selecting a function, then selecting the point...that's usually for one point. if i add more the scaling makes the plot useless for viewing. in ltspice, you just click a couple nodes
     
  9. rapidcoder

    Member

    Jan 16, 2011
    37
    3
    This is funny - the software costs often $2000 or more (not counting the crippled student or evaluation versions) and yet it cannot guarantee convergence of all circuits and so often I'm forced to play with the .IC settings for the DC to converge. And in LTSpice it happens probably more often than in other programs (or I am unlucky).

    Why is this? Is it really that hard to implement any globally convergent DC algorithm?
     
  10. Dookky

    New Member

    Feb 2, 2011
    5
    0
    Here is a good pdf to explain Spice convergence problems
    http://w2.cadence.com/appnotes/SPICEModelingConvergenceExplored.pdf

    As far as OP's question though, I used LTSpice for a very long time and always found it to be satisfactory. However, recently I was able to convince my employer to pay for OrCAD 16.3 and I'm extremely happy with it. It does a much better job with modeling and of course comes with loads of models already defined. But I suppose that's what you get for paying for it.

    Edit: to add. I would consider any SPICE program that allows you to add your own models a good program, as this essentially gives you limitless potential. The only thing to worry about after that is how well the program handles the math.
     
  11. HallMark

    Member

    Apr 3, 2011
    89
    5
    Right now i am using PSpice and earlier i was using Multisim.
     
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