Cylon Pumpkin

This has been done before. There are several good ways to do it: most use either a 555 timer chip and decimal counter chip, or an Arduino. Stefan and I used an Arduino (Boarduino, technically) which limited our scanner to 14 LEDs. No problem --- 14 gives a nice scanning effect! Here's how we wired it: the numbers on the Boarduino block refer to the digital lines d0--d13. It's only necessary to have one curr ...

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