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Topic: EAGLE alternative - larger boards (Read 5 times) previous topic - next topic

MarkT

I wonder if there is a way to post-process the output of eagle into gerber's with a scaling-up of all dimensions?

You would have to define you own libraries of scaled-down devices though... :(
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cr0sh

After I did some more research on everything, it seems that I should continue with either geda or kicad for my future designing goals, rather than Fritzing. I do plan to keep an eye on Fritzing and how it grows; it does seem like an easy way for beginners to get into things, and since it outputs Gerber, it won't lock you into their stuff (they have plans to allow you to upload your board design and have it built/stuffed and mailed back to you).

But - I've already played around with gschem, which is part of geda; I did a preliminary design of my h-bridge with it, just to play around, several months back (long before I found Fritzing). So I am thinking of going with the entire toolbase there - or Kicad, or a combo, or something. I don't want to be locked into anything, and I don't want to be limited (like it seems I might be with Fritzing).

Something I did find, though - which I don't quite understand: In the geda toolchain, there are several symbol sets for various transistors, but none of them were a 2n3055 NPN - however, I did find footprints (for the PCB layout, I think) for a TO-3 case (actually, they were marked for the 2n3055) transistor. Do I need to still create a symbol for the transistor, or do I just use a regular NPN transistor, change some attributes (so that on the schematic layout it is defined as a 2n3055), and then in the PCB editor bring in the 2n3055 footprint - and it will "magically" (or maybe with some massaging) work out trace-wise?

Then again, maybe I just need to redesign my h-bridge away from the 2n3055 (go with a power mosfet design or something)...

:)
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raron

Quote
I have known a couple of folks who did a 4 layer board at home

How did they do that? 4 single-sided PCB's layered on top of each other? I usually try to squeeze out a single-sided PCB when I'm designing one, double-sided works too. Not that Ive designed a lot of PSB's though.


cr0sh:

Ive never used geda, maybe I should try that too sometime but Im kinda sold on kicad. One of the things I like about it is that you are not locked to a particular footprint for any component. Kicad have 4 main parts, EEshcema for schematics, CVpcb to assign schematics to footprints (or "modules" as kicad insists on calling it), PCBnew PCB editor and a a gerber viewer.
Of course you must have the pin names corresponding to each other (schematics to modules/footprints) for a correct PCB layout. If the parts dont have that, its not that difficult to make your own parts. (But Im kinda skeptic about making my own library with lots of parts in it, as I seem to be good at overwriting those with a new one, with the lates part only... or something like that. Its a little while since I used it now, but although Ive used it a little while theres still things I havent got used to yet. Library administration is one of them).

But anyway its a really nice electronics cad imho, but certainly also quirky. Id be pretty lost without some guides, like this one: http://www.curiousinventor.com/guides/kicad

Another thing I like is that it is cross-platform, linux and windows. I dont think its for mac though. And no size limitation (apart from an A4? but you can link several together). There is also a lot of libraries (many converted from Eagle too) for it.

Oh, and a nice addition is the 3D viewer, to visualize the board while you make it. You can even make your own 3D models if you want, with the wings3D package.

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