Gizmodo 
Feb 8, 2006 1:30 PM
35,326
Nineteenth-century computer pioneer Charles Babbage is taken back—via Lego. Andy Carroll, an apparently highly-skilled Lego builder and mathematician, created this functional mechanical computer, modeled after Charles Babbage s Difference Engine, which was a precursor to modern-day computers.
Amazingly enough, this machine is able to solve mathematical problems known as second- and third-order polynomials, and is able to calculate those to three or four digits.
Difference Engine mechanical computer made from legos [Boing Boing]
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