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I think the hardest part of this project is to figure out a way to connect heartbeat sensor to LED control and analyze the data generated by the sensor. I found a website ( that teaches you how to make a headband reacting to wearer's heartbeat. I think using Arduino on prototypes is fine, but it is not practical to attach Arduino on a clothes in real life. There must be some other ways to build a smaller embedded structure that can control the lights according to wearer's heartbeat. I would like to investigate this furthermore. 

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