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Using ImageMagick to slam PNG images around
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Bottom line: using the ATmega168 hardware SPI provided a factor-of-15 speedup and serial digital input, too.
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Usually I replace the blade on my ancient (cast iron!) 14-inch Delta band saw when I can no longer force it through the thing-to-be-cut
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Think about it: an iron casting, with machined-flat surfaces, stamped with instructions.
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After all these years, turning the nut 3 teeth takes the spindle from “free spinning” to “jammed tight”.
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Adjust the chuck properly just once, then run a fat marker around the jaws.
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I couldn’t bear the thought of that lens rattling around in my belt pack, chewed upon by the assortment of other crap in there.
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I proposed building a quick-and-dirty pin wrench
The Smell of Molten Projects in the Morning 