Circuit Model Capability, SPICE-similar

[dpinney]

This is probably very hard, but how much time would it take to put this* into the OMF as a model?

• http://www.falstad.com/circuit/

[drdanley]

While it is undeniably cute, I don’t quite see how this meshes in with the overall goals of OMF. What use could it be to co-ops or other utilities?

[dpinney]

I asked for a time estimate, not an implementation. I intend to use it for components we can't model in Gridlab-D.

[cshjin]

That is a Java applet, but I can show you another web based circuit simulation, https://www.circuitlab.com/. This is what we can expect, right?

[dpinney]

I tried circuitlab and didn't like it as much. Output much less intuitive.

[cshjin]

License information of Falstad's circuit model can be found here: http://www.falstad.com/licensing.html

You have permission to use these applets in a classroom setting or take screenshots as long as the applets are unmodified. Modification or redistribution for non-commercial purposes is allowed, as long as you credit me (Paul Falstad) and provide a link to my page (the page you found the applet(s) on, or http://www.falstad.com/mathphysics.html). Contact me for any other uses. The source code for each applet is generally available on that applet's web page, but some of the applets use third-party source code that has restrictions. THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.

[dpinney]

We're getting requests from the field for circuit sim capabilities.

I think maybe this might be a better fit: http://www.thedigitalmachine.net/eispice.html

[dpinney]

I think the best way to move this forward is to recreate the following analysis in eispice:

[dpinney]

Oh wow. http://www.falstad.com/circuit/ has a javascript version now. That is awesome.

UPDATE: github is here https://github.com/sharpie7/circuitjs1, it's GPL'd.

[dpinney]

TODO

• Figure out whether we need a Java applet server to host circuitjs1.
• If no, built a circuitjs1 compiled version, put it in a new solver.
• Create a new model circuitExample that displays an example circuit to the user.
• Make a list of Python spice or similar libraries.

Target: 10 hours.

[dpinney]

I saw the circuitjs1 demo. It is totally awesome.

Next steps:

1. Get the circuitjs1 in to an OMF model named circuitRealtime.
2. Have way for model to be saved.

Target: 10 hours.

[mannanj]

Is this going to be a hidden model: _circuitRealtime, or in scratch, or neither?

Mannan

---

From: David Pinney [notifications@github.com] Sent: Friday, August 28, 2015 4:31 PM To: dpinney/omf Cc: Javid, Mannan (Contractor) Subject: Re: [omf] Circuit Model Capability, SPICE-similar (#238)

I saw the circuitjs1 demo. It is totally awesome.

Next steps:

1. Get the circuitjs1 in to an OMF model named circuitRealtime.
2. Have way for model to be saved.

Target: 10 hours.

— Reply to this email directly or view it on GitHubhttps://github.com/dpinney/omf/issues/238#issuecomment-135881481.

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[dpinney]

Let's do _circuitRealtime.

[dpinney]

Looks great. Issue closed. Bonus points later to get it to save to database (instead of string or URL).

[mannanj]

Pushed in d85466b38fd7ee946b1bc17b71134a900c2f5188.