This is a pretty quick hack to trigger sound and lightning flashes for a simple Halloween Haunt. It uses a light dependent resister to detect a shadow passing over the sensor. An Arduino reads the sensor and triggers a sound to be played and simulates lightning by flashing a bright LED. The sound is played from a Radio Shack digital recording module.A

Step 1: Video Tour

<p>Can you tell me the materials and tools needed to build this?</p>

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Bio: The picture is from the starting line at Grandma's Marathon in Duluth, MN. I'm in there somewhere near the middle of the pack.
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