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Mary’s current quilt project has a corner design with an essentially infinite number of 45° triangles, which another custom ruler will simplify: That’s the end result of several iterations, proceeding from doodles to sketches to increasingly accurate laser-cut prototypes: A “ruler” in quilting parlance is a thing guiding the sewing machine’s “ruler foot” across the…

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The shells become charcoal
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Mooch a rotary cutter and slash away
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The white glass frit ring around the perimeter lights up nicely
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The boards don’t get any testing because they’re so simple
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Those numbers don’t correspond to any physical reality
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A maximum SPI clock of 2 to 4 MHz … with fair skies, a tailwind, and a stiff power supply
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This may not be a win over bankshotting off Dropbox or Google Drive, except for sensitive bits