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+ - How to Make Electronic Displays with Mood Ring Ink->

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Soychemist
Soychemist writes "Print some thermochromic ink onto a sheet of paper, put metal heating elements on the other, and you have a rudimentary color-changing display. Chemists in the Whitesides Group at Harvard think that the devices could be used to provide a simple readout from cheap medical tests and kits that check water for pollutants. In the past year, the same scientists have made a three-cent medical test and improvised a centrifuge with an egg beater. Their aim is to invent useful gizmos with everyday materials."
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How to Make Electronic Displays with Mood Ring Ink More

How to Make Electronic Displays with Mood Ring Ink

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