During the 4th VLCS workshop that took place on Monday, October 16th during the Mobicom week at Snowbird, Andreas Soleiman and Ambuj Varshney from Uppsala University (Sweden) introduced a new battery-free gesture sensing system.
Their prototype relies on visible light sensing and backscatter technology to achieve accurate hand motion sensing and wireless communication using RFID without any battery. They take advantage off 2 solar cells, one for powering the small circuit and charging a 2uF capacitance, and the second, much smaller, as a light sensor.
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