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Here are some pictures of a Music Synchronized LED Traffic Light that I made. You can read about it at http://colvins.ca/?p=86. Here is a video:
Traffic Light System with Pedestrian Crossing lightsby SKYuvraj
Arduino Traffic Light System.by Ajyhooda
Mini Traffic Light Arduinoby wawann
AMBULANCE-FRIENDLY TRAFFIC CONTROL SYSTEM —-wired version (pre-project)by SanjivK3
Arduino Traffic Lights (ORIGINAL)by Matthew Blevins
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