Scientists have developed an electronic skin that converts sweat into energy to control a robotic arm. The flexible, rubber material is stuck on a person’s skin. It then uses embedded sensors to monitor their health and the nerve signals that control their muscles — without the need for a battery. “One of the major challenges with these kinds of wearable devices is on the power side,” said the device’s creator Wei Gao, an assistant professor at California Institute of Technology. “Many people are using batteries, but that’s not very sustainable. Some people have tried using solar cells or harvesting the power of human motion, but we…
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