Griffith is one of the brains behind Instructables, a community website that lets users share directions for … almost anything, from building your own home lathe to “How to Kiss.” His think-tank design firm, Squid Labs, has invented an array of new devices and materials — such as a “smart” rope that senses its load, or a machine for making low-cost eyeglass lenses through a process inspired by a water droplet — and has now spun off several separate companies to dig deeper into some of the technologies it has pioneered, including Potenco, which makes the groovy pull-string power source for the XO laptop.
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