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Neil Fraser builds logic gates out of dominoes. (See also this half-adder.) Via Mathpuzzle.
posted by Upton O'Good on Sep 1, 2008 - 18 comments

A virtually unlimited supply of randomly-generated logic puzzles, in a variety of sizes and difficulties: Nonograms. Slither Link. Nurikabe. Bridges. Light Up.
posted by Upton O'Good on Nov 28, 2007 - 18 comments