Build an Electronic Audio Game with a Pencil, Paper, and Conductive Ink

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Build an Electronic Audio Game with a Pencil, Paper, and Conductive Ink


Over the years there have been many electronic toys that let you play with and learn about electricity. Jay Silver’s Drawdio (Figure A) from 2008 combines a simple 555 timer circuit with a pencil to make squeals, beeps, and musical tones. When you draw ….

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