Instructables
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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
 
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Step 1: Video Tour

dangelo tan4 months ago

Can you tell me the materials and tools needed to build this?