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by elihu 3422 days ago
I wish I had a link, but this reminds me of a machine that was at the OMSI Maker Faire in Portland last summer that measured the shininess of pennies and then directed them into a large board with columns (kind of like a giant connect-four board).

The machine sorted the pennies to match a greyscale image given as input, so that the final output is a penny mural ready to be encased in epoxy.