«Taking a cue from automatic watches that rely on the energy generated by the wearer, researchers at the University of California, Irvine (UCI) have created a battery-free wearable that can monitor vital signs in real-time. So far, their prototype can only track the wearer’s pulse, but, according to a paper published by the research team, the technology can be used to measure a range of biometrics such as blood pressure and body temperature with a simple switch of a sensor circuit. All without a battery or an external power source.»
«So how does the wristband device get its power? Two ways: finger tapping and smart devices. With the first, the wearer merely has to tap on the wristband to power up the sensory circuit, prompting the user’s pulse rate to appear on an LED display. With the second, the user holds the wristband near a mobile device such as a smartphone or a tablet to draw power, as well as wirelessly transfer data between the wristband and the device — an example of embedded near-field communication (NFC) technology. Through the data transfer, the wearer’s biometric information is displayed on the screen of the smartphone.»
Article written by William McCleary.