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Xia Zhou: So, the power supply, yeah Miles OBrien: Computer scientist Xia Zhou thinks a lot about traffic. Xia Zhou: One problem you see is coming from the increasing demand, traffic demands, from the increasing number of devices we have today. Miles OBrien: Smart phones, tablets, watches - the number of wireless devices we depend on keeps going up and up, and more data traffic means more traffic jams. Xia Zhou: Radio frequency is what we use today for wireless communication. The idea of visible light communication is to look at another medium, which is visible light spectrum. Miles OBrien: With support from the National Science Foundation, Zhou and a team at Dartmouth College are developing faster ways to encode and transmit all that data using the same kind of lighting devices we have in our homes. Xia Zhou: The idea is turn the lights around us into wireless transmitters to encode data into the changes of the light. Miles OBrien: By connecting a small modulation unit, any LED
