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Technology

Submission + - Silver Pen Allows for Hand-Written Circuits (gizmag.com)

Zothecula writes: People have been using pens to jot down their thoughts for thousands of years but now engineers at the University of Illinois have developed a silver-inked rollerball pen that allows users to jot down electrical circuits and interconnects on paper, wood and other surfaces. Looking just like a regular ballpoint pen, the pen's ink consists of a solution of real silver that dries to leave electrically conductive silver pathways. These pathways maintain their conductivity through multiple bends and folds of the paper, enabling users to personally fabricate low-cost, flexible and disposable electronic devices.
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Silver Pen Allows for Hand-Written Circuits

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In 1914, the first crossword puzzle was printed in a newspaper. The creator received $4000 down ... and $3000 across.

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