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. 2022 Dec 23;8(51):eade2450. doi: 10.1126/sciadv.ade2450

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Fig. 4. — (A) Photograph of the flexible circuit for the wireless e-skin as a touch IoT device. (B) Forward and backward signal transmitting through Bluetooth. (C) Three common Bluetooth network topologies. (D) Circuit diagram of the feedback module for the haptic reproduction of the e-skin. The extension module is optional for the scalable design of the e-skin. (E) Schematic diagram of electric switch. GND: Ground. (F) Circuit diagram of the sensing module for tactile sensing of the e-skin. (G) A photograph of the soft e-skin with a 6 × 6 array of actuators. (H) Photographs of an elliptical shape e-skin with 12 actuators.