kicad-developers team mailing list archive

["�vind Aabling" <Oyvind.Aabling@xxxxxxxx>]

On Fri, 13 Aug 2010, Vesa Solonen wrote:

> On Thu, 12 Aug 2010, Alex G wrote:
>
> > BTW, is the naming of the footprints acceptable?
>
> I think so. It's the easiest to change if needed :)
>
> > I've set it at 0.5mm. What value should I increase it to; 1mm? If I
> > change the radius, I'll also have to adjust the footprint, as a minimim
> > clearance of 4.4mm from the base of the package to the bend is recommended.
>
> Google "to-220 lead bending radius" found a good International Rectifier 
> application note: http://www.irf.com/technical-info/appnotes/an-1031.pdf
> So it would work out to 1.2mm, which is on the safe side. Also bent stress 
> relief vertical option might be nice, but that may add too many varables.
>
> > Alright, I'll remove the numbering from the mounting hole. I'll leave
> > the pad outer radius at 6mm, as that is necessary to sufficiently
> > accommodate an M3 screw.
>
> Now that you said it I had to check M3 nut max width and it says 6.4mm. So 
> maybe 6.5mm is big enough with tolerances. Please don't get mad at me ;)
>
> > Sure. I have the S202S02 in front of me. The missing pins are there,
> > except that they are cut from the base of the package. It is possible
> > that this may become a standard package (TO-somenumber), or that we will
> > see more parts with this package in the future, with the missing pins.
> > Numbering the missing pins will provide consistency should that happen.
> > If you believe I should ignore the missing pins, and just number
> > existing ones 1,2,3,4, I have no objection.
>
> Someone wiser than me shoud comment here. I'd make numbering conform to exact 
> pin count this time, but I can see problems coming from various DIP packages 
> with partial pin count. Schematic wise it's a bit mess as multi part packages 
> come to mind when one sees larger pin numbers than pin count.
>
> > I am excited about this, and at times, it may be difficult to be
> > patient. I'm waiting to get my hands on the Perl script that generates
> > the libs so that I can play around with it. I'll suggest to Oydvind that
> > we create a branch in Kicad-Newlib for his work.

Done :-)

My work is now at lp:~oyvind-aabling/kicad-newlib/mod.

So far only the libs, but I'll add the perl code as well
when I've cleaned it up a bit and added some license info.

Currently, all parts and module files are rewritten on a full make.
I need to add some checks, so that only changed files gets rewritten.
This requires a rewrite of the toplevel module admin code,
which needs a shineup anyway - it was put together
with a shovel, to get some useful work done :-)

> :D I know. Best luck to the cooperation. I'm sure this will bring something 
> good.

Yes, hopefully - Alex, how good are your perl skills ?-)

> > I'm glad you like them. I drew the 3D packages in Inventor with the
> > exact dimensions from the datasheet. I want to get any glitches cleared
> > ASAP, so I'm willing to work on this literally 24/7 (minus
> > sleep/eat/drink time).
>
> Thank you for your enthusiasm. Take your time, reaching perfection may need 
> infinite time, but we just need something thats always good ;)
>
> > I've also created a branch in Kicad-Newlib here:
> > https://code.launchpad.net/~mr-nuke-me/kicad-newlib/footprints_misc
> > I'll submit the footprints there once I figure out how to use bzr; and
> > I'll just ping here.
>
> Great to see you getting along :)
>
> -Vesa
>
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Øyvind.

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