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Date: | Tue, 8 Oct 2013 08:13:22 -0500 |
Message-ID: | <CAN0Jx-8gHgHBzzxFqsZssUjjygWqSJOCZ5jJvES91K7y6eUeLQ@mail.gmail.com> |
Subject: | Re: [geda-user] polygons, arcs and footprints |
From: | Russell Dill <Russ DOT Dill AT asu DOT edu> |
To: | geda-user AT delorie DOT com |
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--001a11c2430a88dd4b04e83a88be Content-Type: text/plain; charset=UTF-8 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. --001a11c2430a88dd4b04e83a88be Content-Type: application/octet-stream; name="spin.fp" Content-Disposition: attachment; filename="spin.fp" Content-Transfer-Encoding: base64 X-Attachment-Id: f_hmj5ewtf0 RWxlbWVudCBbMHgwMCAiU3BpbiIgIiIgIiIgMC4wMDAwMDBtbSAwLjAwMDAwMG1tIDAuMDAwMDAw bW0gMC4wMDAwMDBtbSAwIDEwMCAweDAwXQooCglQYWQgWyAwLjE1NjQzNG1tIC0wLjk4NzY4OG1t IC0wLjE1NjQzNG1tIC0wLjk4NzY4OG1tIDAuMTAwMDAwbW0gMC4zMDQ4MDBtbSAwLjIyNzAwMG1t ICIxIiAiMSIgIiIgXQoJUGFkIFsgLTAuMTU2NDM0bW0gLTAuOTg3Njg4bW0gLTAuNDUzOTkwbW0g LTAuODkxMDA3bW0gMC4xMDAwMDBtbSAwLjMwNDgwMG1tIDAuMjI3MDAwbW0gIjEiICIxIiAiIiBd CglQYWQgWyAtMC40NTM5OTBtbSAtMC44OTEwMDdtbSAtMC43MDcxMDdtbSAtMC43MDcxMDdtbSAw LjEwMDAwMG1tIDAuMzA0ODAwbW0gMC4yMjcwMDBtbSAiMSIgIjEiICIiIF0KCVBhZCBbIC0wLjcw NzEwN21tIC0wLjcwNzEwN21tIC0wLjg5MTAwN21tIC0wLjQ1Mzk5MG1tIDAuMTAwMDAwbW0gMC4z MDQ4MDBtbSAwLjIyNzAwMG1tICIxIiAiMSIgIiIgXQoJUGFkIFsgLTAuODkxMDA3bW0gLTAuNDUz OTkwbW0gLTAuOTg3Njg4bW0gLTAuMTU2NDM0bW0gMC4xMDAwMDBtbSAwLjMwNDgwMG1tIDAuMjI3 MDAwbW0gIjEiICIxIiAiIiBdCglQYWQgWyAtMC45ODc2ODhtbSAtMC4xNTY0MzRtbSAtMC45ODc2 ODhtbSAwLjE1NjQzNG1tIDAuMTAwMDAwbW0gMC4zMDQ4MDBtbSAwLjIyNzAwMG1tICIxIiAiMSIg IiIgXQoJUGFkIFsgLTAuOTg3Njg4bW0gMC4xNTY0MzRtbSAtMC44OTEwMDdtbSAwLjQ1Mzk5MG1t IDAuMTAwMDAwbW0gMC4zMDQ4MDBtbSAwLjIyNzAwMG1tICIxIiAiMSIgIiIgXQoJUGFkIFsgLTAu ODkxMDA3bW0gMC40NTM5OTBtbSAtMC43MDcxMDdtbSAwLjcwNzEwN21tIDAuMTAwMDAwbW0gMC4z MDQ4MDBtbSAwLjIyNzAwMG1tICIxIiAiMSIgIiIgXQoJUGFkIFsgLTAuNzA3MTA3bW0gMC43MDcx MDdtbSAtMC40NTM5OTBtbSAwLjg5MTAwN21tIDAuMTAwMDAwbW0gMC4zMDQ4MDBtbSAwLjIyNzAw MG1tICIxIiAiMSIgIiIgXQoJUGFkIFsgLTAuNDUzOTkwbW0gMC44OTEwMDdtbSAtMC4xNTY0MzRt bSAwLjk4NzY4OG1tIDAuMTAwMDAwbW0gMC4zMDQ4MDBtbSAwLjIyNzAwMG1tICIxIiAiMSIgIiIg XQoJUGFkIFsgLTAuMTU2NDM0bW0gMC45ODc2ODhtbSAwLjE1NjQzNG1tIDAuOTg3Njg4bW0gMC4x MDAwMDBtbSAwLjMwNDgwMG1tIDAuMjI3MDAwbW0gIjEiICIxIiAiIiBdCglQYWQgWyAwLjE1NjQz NG1tIDAuOTg3Njg4bW0gMC40NTM5OTBtbSAwLjg5MTAwN21tIDAuMTAwMDAwbW0gMC4zMDQ4MDBt bSAwLjIyNzAwMG1tICIxIiAiMSIgIiIgXQoJUGFkIFsgMC40NTM5OTBtbSAwLjg5MTAwN21tIDAu NzA3MTA3bW0gMC43MDcxMDdtbSAwLjEwMDAwMG1tIDAuMzA0ODAwbW0gMC4yMjcwMDBtbSAiMSIg IjEiICIiIF0KCVBhZCBbIDAuNzA3MTA3bW0gMC43MDcxMDdtbSAwLjg5MTAwN21tIDAuNDUzOTkw bW0gMC4xMDAwMDBtbSAwLjMwNDgwMG1tIDAuMjI3MDAwbW0gIjEiICIxIiAiIiBdCglQYWQgWyAw Ljg5MTAwN21tIDAuNDUzOTkwbW0gMC45ODc2ODhtbSAwLjE1NjQzNG1tIDAuMTAwMDAwbW0gMC4z MDQ4MDBtbSAwLjIyNzAwMG1tICIxIiAiMSIgIiIgXQoJUGFkIFsgMC45ODc2ODhtbSAwLjE1NjQz NG1tIDAuOTg3Njg4bW0gLTAuMTU2NDM0bW0gMC4xMDAwMDBtbSAwLjMwNDgwMG1tIDAuMjI3MDAw bW0gIjEiICIxIiAiIiBdCglQYWQgWyAwLjk4NzY4OG1tIC0wLjE1NjQzNG1tIDAuODkxMDA3bW0g LTAuNDUzOTkwbW0gMC4xMDAwMDBtbSAwLjMwNDgwMG1tIDAuMjI3MDAwbW0gIjEiICIxIiAiIiBd CglQYWQgWyAwLjg5MTAwN21tIC0wLjQ1Mzk5MG1tIDAuNzA3MTA3bW0gLTAuNzA3MTA3bW0gMC4x MDAwMDBtbSAwLjMwNDgwMG1tIDAuMjI3MDAwbW0gIjEiICIxIiAiIiBdCglQYWQgWyAwLjcwNzEw N21tIC0wLjcwNzEwN21tIDAuNDUzOTkwbW0gLTAuODkxMDA3bW0gMC4xMDAwMDBtbSAwLjMwNDgw MG1tIDAuMjI3MDAwbW0gIjEiICIxIiAiIiBdCglQYWQgWyAwLjQ1Mzk5MG1tIC0wLjg5MTAwN21t IDAuMTU2NDM0bW0gLTAuOTg3Njg4bW0gMC4xMDAwMDBtbSAwLjMwNDgwMG1tIDAuMjI3MDAwbW0g IjEiICIxIiAiIiBdCikK --001a11c2430a88dd4b04e83a88be--
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