Electronic Circuit Simulation

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#1
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So, I'm working this project and I think it would be really cool to be able to draw out a schematic of a circuit and get an idea of what that circuit will do using a computer simulator as this would be cheaper, faster, easier, and I could do it while sitting in a cafe on the weekend rather than sitting in my basement workshop.

I've looked into various solutions and I have only really found two. The first is great! Except that you can't save your files, and it seems to have trouble dealing with feedback loops, but the interface is rocken and I love the way that you can play with things. It is a java applet available here...

http://www.falstad.com/circuit/

The second is open source Xcircuit which uses spice3 which is supposed to be a lot more powerful! I've just spent yesterday afternoon and this morning working to get Xcircuit to do what that simple little applet does, and I have to say that Xcircuit is such a huge PITA that I have lost patience. It seems like the software is not actually supposed to *help* you design circuits but rather there to get you to learn a *whole lot* of obscure stuff about how to run Xcircuit. Not really very satisfying at all.

Are there any better solutions out there? If that applet had more functionality it would be great. If Xcircuit were a bit more accessible I'm sure it would be great too...

As is stands I'm thinking that I'll be better off just working with chips and my oscilloscope.

Suggestions?

B

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Don't cross-post please.

Have a look in the collection of free tools&programs in the OffTopic Sticky at the top.

A GIF is worth a thousend words   They are called Rosa, Sylvia, Tricia, and Ulyana. You can find them https://www.linuxmint.com/

Dragon broken ? http://aplomb.nl/TechStuff/Dragon/Dragon.html for how-to-fix tips

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I really like LTSpice, also known as swcad. It is free and is offered by Linear Technology. It is primarily for simulation of their switch-mode power supplies but is a full featured SPICE simulator.

Whether or not you would rate it as a PITA, I have no idea. SPICE sims tend to require a lot of attention to detail, but I have always found the results worth while.

Jim Wagner
Oregon Research Electronics, Consulting Div.
Tangent, OR, USA

 

Until Black Lives Matter, we do not have "All Lives Matter"!

 

 

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Hey Plons,

Sorry that you feel that this post is inappropriate, but I guess I might differ on that point. The Sticky that you mention ( or at least the one I found ) is all about skype and cool widgets etc. Those are indeed off topic.

This subject I think is very very much on topic... General Electronics topics to be specific, but of very real relevance to many AVR implementors. It's true that many of us work primarily in the coding of AVRs, but a lot of us are actually responsible for creating the electronic interfaces by which our AVRs connect to the world. I thought that this was what the General Electronics section was *all* about.

What I'm looking for here is a tool that I can use to help me to design these interface circuits for my AVR. I thought that that was very much on topic.

If we need to move this topic, very well. But please not to an Off Topic sticky about software toys. I'm hoping for serious answers to a question that is really holding me back right now.

Thanks,

Bill

PS. Jim, I'll give LTSpice and swcad a shot. Thanks.

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Bill, mentioning here (in this forum) not to cross-post, can also mean that I saw the same post in another forum (and that is what happened)
Since you gave it a good thought, it's okay :)

Cheers

Nard

A GIF is worth a thousend words   They are called Rosa, Sylvia, Tricia, and Ulyana. You can find them https://www.linuxmint.com/

Dragon broken ? http://aplomb.nl/TechStuff/Dragon/Dragon.html for how-to-fix tips

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Plons,

Ok cool. Thanks.

By the way, what was that other forum? I'd like to read the thread.

B

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Apparently I was "in de bonen", meaning "confused". Shouldn't spend so much time on the forum.
I apologize .... my mistake.

Cheers

Nard

Edit: or are you teasing me, and was the double post in the general forum deleted ... ? Anyway, if that's the case: :) , and if not: sorry

A GIF is worth a thousend words   They are called Rosa, Sylvia, Tricia, and Ulyana. You can find them https://www.linuxmint.com/

Dragon broken ? http://aplomb.nl/TechStuff/Dragon/Dragon.html for how-to-fix tips

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JIM!!!!

LTSpice rocks!!! Exactly what I was looking for.

Fab!

Thanks,

B

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I really like AIM spice. You have to type in the node list rather than point and click parts, but it's free and gives me very fast results for simple circuits. (And sometimes manual input is faster than GUI).

Regards,
Paul