Fig. 3: Performance of the EM electronics at a small temperature difference.
From: Flexible thermoelectric generator and energy management electronics powered by body heat
a System architecture and photo of the self-contained wearable device powered by the FTEG plus EM. Scale bar: 10 mm. b Generated voltage and current of the FTEG as a function of the temperature difference between human skin and the environment. c Output voltage and current of the EM as a function of the generated voltage of the FTEG. When the FTEG outputs a low voltage of 30.2 mV, the EM can output a DC level of 3.4 V. d BLE load voltage and load current with the FTEG at a temperature difference of 2 K. The BLE transmission interval is 1.6 s. e Real-time data of body temperature and humidity from the wearable system powered by the FTEG plus EM at a temperature difference of 2 K. As a comparison, it shows sensor data from the system charged by a lithium battery
