His job at Intel takes him to festivals and events such as the Bay Area Maker Faire, where he leads creative workshops on such activities as making digital circuits by drawing with a pencil.

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The engineers next demonstrated the possibilities of their techniques by creating the essential components of digital integrated systems: arithmetic circuits and sequential storage, as well as the first monolithic three-dimensional integrated circuits with extreme levels of integration.

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It makes digital signal processors, analog and mixed-signal circuits and algorithms for voice isolation and noise suppression.

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In his last regular Circuits column, David Pogue checks out a handful of binoculars that have built-in digital cameras.

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