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Hello again Matan. I am preparing an article for my personal blog. I send you a sample with kicad and LTSpice simulation. I would like your opinion. Circuits are four basic configurations with operational amplifiers. Inverting, non-inverting, inverting summing and non-inverting summing. I used the simulation model Microchip MCP6241 operational amplifier. You can simulation model from manufacturer site. I can not mail the kicad project files and LTSpice because Gmail will not let me attach the files. When the article is finished and uploaded the files to dropbox, will show you the links to download the simulation. Thanks and regards. http://astroelectronica.wordpress.com [image: Imágenes integradas 1][image: Imágenes integradas 2] 2013/10/7 Astroelectrónica <astroelectronica@xxxxxxxxx> > Hi Matan. > > Kicad is normally used to generate schematic, PCB and BOM. It is also used > to generate manufacturing files as Gebers. > > Usually the external power supplies and signal generators do not belong to > the PCB or BOM. It is for this reason that I add these elements in the > simulation project but not in kicad design. > > It's easier to work this way because if you want to change the power or > signal values do not need to create a netlist file every time you want to > launch a simulation. > > You can see an example in the following articles of my personal blog: > > > http://astroelectronica.wordpress.com/2013/07/14/an1297-simulacion-transitoria-del-mcp6241-en-kicad-y-orcad/ > > > http://astroelectronica.wordpress.com/2013/05/17/diodos-zener-con-kicad-y-orcad/ > > > http://astroelectronica.wordpress.com/2013/05/08/amplificadores-operacionales-aritmeticos-con-kicad-y-orcad/ > > Cheers! > > > 2013/10/7 Matan Gal-Katziri <matangk@xxxxxxxxx> > >> Thanks for the advice, Miguel! >> I didn't know you can use external files to reference to spice >> simulations. That's good to know. >> Not sure I understand what you mean "include power supplies and generator >> in the simulation project". >> you mean in another sub-circuit? I will go through your blog and look >> at more of your examples. >> >> KiCad design flow is quite different from what I'm used to. >> At work we usually have three steps: >> 1. Hand calculations - Done the same. >> 2. Schematic design and simulation - just learning how to do that, not as >> easy as with commercial tools.. >> 3. Layout extraction (For SI/High freq analog) - I know the commercial >> tools very well (ADS/EM solvers) but those are expansive. Are there any >> free software? >> >> Anyway, thanks again! >> Matan >> >> >> >> On Mon, Oct 7, 2013 at 3:04 PM, Astroelectrónica < >> astroelectronica@xxxxxxxxx> wrote: >> >>> Hi Matan . >>> >>> You did a good job . The document is very illustrative. >>> >>> I've done some testing with LTspice and TINA simulating circuits >>> designed in kicad . All simulators are very similar. >>> >>> No need to paste the simulation model in the schematic . Sometimes the >>> model can be very large and it is necessary to work with very large sheet >>> sizes . Simulation models can be saved in library files and add them to >>> the project simulation using pspice instructions . >>> >>> Similarly, the power supplies and signal generators can be included in >>> the simulation project , avoiding the inclusion in the list of materials. >>> >>> I think this method is better because it allows launching several >>> simulations without the need to generate a ". Cir " every time. >>> >>> Please see my personal blog where you can see examples of pspice >>> simulations performed with kicad project . >>> >>> http://astroelectronica.wordpress.com >>> >>> A common point of simulators is that most are designed only for analog >>> simulations . Manufacturers offer IBIS files from digital devices. These >>> files can be translated to IBIS pspice with IBIS2Spice of Intusoft tool . >>> >>> http://www.intusoft.com/utilities.htm >>> >>> I am working to implement digital simulations kicad projects. I also >>> think it is important to work with signal integrity simulations, signal >>> reflections, transmission lines, etc ... >>> >>> Cheers! >>> >>> >>> 2013/10/6 Matan Gal-Katziri <matangk@xxxxxxxxx> >>> >>>> Hi Guys, >>>> I had a little time this weekend to arrange my thoughts and write a >>>> coherent documentation of what I did. Conclusions: >>>> 1. I think it covers procedures that might look obvious to advanced >>>> users. >>>> 2. This is my preferred working method and not an absolute >>>> truth. Others might not like it. >>>> 3. If KiCad could create sub-circuits out of hierarchies where >>>> local hierarchical labels are the pins it could be great for integration >>>> purposes, don't know if it's on your roadmap though. >>>> >>>> Anyway, I attach a preliminary PDF of what I did. If you still find the >>>> content helpful I can convert it to your file format, review and upload to >>>> the repository.. >>>> >>>> Best regards, >>>> Matan Gal-Katziri >>>> >>>> >>>> On Thu, Oct 3, 2013 at 2:21 PM, Matan Gal-Katziri <matangk@xxxxxxxxx>wrote: >>>> >>>>> Nacho, >>>>> I feel the same way about qucs. Maybe their choice to work with a >>>>> private netlist format also contribute to bugs and import issues... >>>>> After a short study (my time is very limited..) I chose to work with >>>>> LTspice. It's free, well maintained and has a GUI. don't know about netlist >>>>> size limitations though. >>>>> >>>>> Anyway, I feel that the easiest thing would be if Kicad could create >>>>> spice subcircuits from hierarchies, where the hierarchy labels (local, not >>>>> global) will be the subcircuit pins. I succeeded to do something similar to >>>>> that manually and I bet automating the procedure shouldn't be difficult. >>>>> >>>>> Also, adding a .model/.subckt field to components can save a lot of >>>>> work when exporting spice netlists. >>>>> >>>>> Once you have a subcircuit in hand - use whatever simulator you want. >>>>> Almost all of them can handle spice subcircuits and the purpose of Kicad >>>>> simulation (IMHO) is mainly verification of schematic. >>>>> >>>>> Regards, >>>>> Matan >>>>> >>>>> >>>>> On Thu, Oct 3, 2013 at 1:45 PM, Nacho Domínguez <domalmig@xxxxxxxxx>wrote: >>>>> >>>>>> Hi all. >>>>>> >>>>>> I have some simulation samples at my personal blog carried on with >>>>>> Capture Student Version 9.1/Pspice or Qucs. These simulations are based on >>>>>> kicad schematics mainly. >>>>>> >>>>>> So, I try to confirm that it's possible to perform theorical >>>>>> simulations of kicad schematics with a external tool. >>>>>> >>>>>> I prefer Pspice because allows some functions more that Qucs. >>>>>> Unfortunatelly Pspice runs just on Windows systems, and I know that no runs >>>>>> over Win7, Win8 or Vista. I think that Qucs is "green" yet. Qucs needs to >>>>>> add some functions like pointers in track mode over waves, including >>>>>> libraries and subcircuit files, ... >>>>>> >>>>>> I'd like to work with Qucs because Pspice is limited a few nodes in >>>>>> schematic, and for some circuits this tool is not enough. >>>>>> >>>>>> It's a great idea to include a simulation tool to Kicad. >>>>>> >>>>>> Best regards. >>>>>> >>>>>> >>>>>> >>>>>> 2013/10/3 Miguel Angel Ajo Pelayo <miguelangel@xxxxxxx> >>>>>> >>>>>>> >>>>>>> Thanks Fabrizio and thanks Matan!, >>>>>>> >>>>>>> Matan, it sound really interesting, and documentation is never a >>>>>>> minor sharing, >>>>>>> it's one of the parts developers usually are reluctant to work in, >>>>>>> because we >>>>>>> feel that our hours are better spent on writing lines of code (even >>>>>>> if that's no >>>>>>> t always true), usually is that we like more writing code.... >>>>>>> >>>>>>> >>>>>>> Fabrizio, if I'm not wrong, and as you pointed, there is a branch >>>>>>> with all the documentation files only,the people working on >>>>>>> documentation just pull / push to this branch >>>>>>> using bzr. >>>>>>> >>>>>>> http://bazaar.launchpad.net/~kicad-developers/kicad/doc/files >>>>>>> >>>>>>> >>>>>>> Matan: >>>>>>> >>>>>>> I have a friend -Nacho Dominguez-, (I think he collaborates already >>>>>>> with docs or footprint parts), who's been doing kicad based simulation >>>>>>> lately (but all in spanish), may be he would be happy to join forces with >>>>>>> you if you were interested. I put him in CC. >>>>>>> >>>>>>> >>>>>>> http://astroelectronica.wordpress.com/2013/08/05/an1297-simulacion-de-ruido-del-mcp6241-en-kicad-y-orcad/ >>>>>>> >>>>>>> >>>>>>> http://astroelectronica.wordpress.com/2013/04/02/diodos-rectificadores-con-kicad-y-qucs/ >>>>>>> >>>>>>> >>>>>>> http://astroelectronica.wordpress.com/2013/09/22/optimizador-con-kicad-y-orcad/ >>>>>>> >>>>>>> >>>>>>> 2013/10/2 Fabrizio Tappero <fabrizio.tappero@xxxxxxxxx> >>>>>>> >>>>>>>> Hi matan. >>>>>>>> Little material? I think there are approx 400 pages in manuals and >>>>>>>> tutorials and several languages. >>>>>>>> I however agree that it could be better, especially if i had 2k >>>>>>>> hours to give away. >>>>>>>> >>>>>>>> Have you seen the kicad tutorial that is actually linked with kicad? >>>>>>>> Why dont we extend it with what u have in mind? >>>>>>>> What do u have in mind? >>>>>>>> I am into tutorials and this could be a chance for something more >>>>>>>> interesting than a pdf or a video >>>>>>>> Cheers >>>>>>>> Fabrizio >>>>>>>> On Oct 2, 2013 8:33 PM, "Dick Hollenbeck" <dick@xxxxxxxxxxx> wrote: >>>>>>>> >>>>>>>>> On 10/02/2013 12:38 AM, Matan Gal Katziri wrote: >>>>>>>>> > Hi Dick, >>>>>>>>> > >>>>>>>>> > I'm a relatively new user of Kicad (few months now) and use it >>>>>>>>> for hobby >>>>>>>>> > projects. >>>>>>>>> > First, I wanted to thank you and the development team -- you are >>>>>>>>> doing a >>>>>>>>> > wonderful job! >>>>>>>>> > >>>>>>>>> > Second, as I got kicad for free, I thought it would be nice if I >>>>>>>>> shared >>>>>>>>> > something back (even if minor): >>>>>>>>> > I spent some time lately on trying to define a complete design >>>>>>>>> flow -- >>>>>>>>> > simulation to layout -- using kicad and spice. >>>>>>>>> > There is very little material online in this subject, some not in >>>>>>>>> > English, some incomplete, and it took me a while to get >>>>>>>>> > (most) issues solved. >>>>>>>>> > >>>>>>>>> > I would be happy to write a short manual, based on what I've >>>>>>>>> learned and >>>>>>>>> > publish it, however: >>>>>>>>> > 1. The flow involves LTspice which, while free, is still a >>>>>>>>> branded >>>>>>>>> > software. Is there any problem with writing a manual that >>>>>>>>> involves >>>>>>>>> > LTspice? My flow isn't really limited to LTspice, but using it >>>>>>>>> makes >>>>>>>>> > things much easier because it has an integrated GUI. >>>>>>>>> > 2. I do not own any online space (blog, etc.) nor plan to open >>>>>>>>> one. >>>>>>>>> > Could I send a PDF to the development team and have it published >>>>>>>>> on >>>>>>>>> > Kicad site (after review)? >>>>>>>>> > >>>>>>>>> > Thanks again, >>>>>>>>> > Best regards >>>>>>>>> > Matan Gal-Katziri. >>>>>>>>> > >>>>>>>>> >>>>>>>>> Hi Matan, >>>>>>>>> >>>>>>>>> I am copying Fabrizio and Miguel on this. I don't know anything >>>>>>>>> about our documentation. >>>>>>>>> These two gentlemen know more than I do. >>>>>>>>> >>>>>>>>> I hope they can help you. >>>>>>>>> >>>>>>>>> Dick >>>>>>>>> >>>>>>>>> >>>>>>> >>>>>>> >>>>>>> -- >>>>>>> >>>>>>> Miguel Angel Ajo Pelayo >>>>>>> http://www.nbee.es >>>>>>> +34 636 52 25 69 >>>>>>> skype: ajoajoajo >>>>>>> >>>>>> >>>>>> >>>>> >>>> >>> >> >
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