I've been seeing weird connector footprints in open source hardware =20
designs (ie from "Sparkfun"), and I thought they had gone off and =20
found a great deal on some not-quite-standard connector from an odd =20
supplier or something.

Not so!  Apparently this is an intentional "manufacturing aid" for =20
standard headers.  They wrote up a tutorial (several years ago):

    http://www.sparkfun.com/tutorials/114

It seems like a rather clever and useful hack, so I'm spreading it =20
around.

BillW

--=20
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