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Tue, 08 Oct 2013 06:34:46 -0700 (PDT) | |
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Date: | Tue, 8 Oct 2013 08:34:46 -0500 |
Message-ID: | <CAM2RGhS896Ub3=jJ73V5K2Qw4iSfGfS6SCeVKQ0c3WR2kn6WAA@mail.gmail.com> |
Subject: | Re: [geda-user] polygons, arcs and footprints |
From: | Evan Foss <evanfoss AT gmail DOT com> |
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Thanks to all of you for the work you are putting into this problem. I really did not figure this thread would get that much attention. On Tue, Oct 8, 2013 at 8:33 AM, Evan Foss <evanfoss AT gmail DOT com> wrote: > If your going to go about it that way then why use rectangles you > could just as easily use stroke. > > I though arbitrary rotate of rectangles was not allowed in the pcb > format. It does not work from the gui of the version I am using. Is > that a bug? > > On Tue, Oct 8, 2013 at 8:13 AM, Russell Dill <Russ DOT Dill AT asu DOT edu> wrote: >> On Fri, Oct 4, 2013 at 4:56 PM, Evan Foss <evanfoss AT gmail DOT com> wrote: >>> Hi folks, >>> >>> I am trying to make a footprint for an LTC3441. The bottom pad is a >>> polygon. I know they are not possible in PCB footprints but does >>> anyone have a good way to emulation one? >>> >>> Also I am trying to use a MEMS microphone that uses a ring to seal it >>> to the PCB. Again I know that does not exist but is there a way around >>> it? >> >> A ring is a little more complicated, but here's an example of a funny >> ring pad shape >> >> w = dmath.sin(dmath.radians(angle / 2)) * 2 >> h = m.radius * dmath.cos(dmath.radians(angle / 2)) >> piece = pscad.up(h) + pscad.square((w + m.width, m.width), >> rounded=True, center=True) >> ret = [] >> for i in range(0, m.n): >> ret.append(pscad.rotate(i * 360 / m.n) + piece) >> return pscad.union() + tuple(ret) >> >> Attached is a single pad with the above pattern with n == 20, width == >> 0.1mm, and radius == 1.0mm. > > > > -- > Home > http://evanfoss.googlepages.com/ > Work > http://forge.abcd.harvard.edu/gf/project/epl_engineering/wiki/ -- Home http://evanfoss.googlepages.com/ Work http://forge.abcd.harvard.edu/gf/project/epl_engineering/wiki/
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