Abstract: A triboelectric nanogenerating device is configured for providing an electric power to an electronic device and the triboelectric nanogenerating device includes at least one scaly triboelectric membrane configured for providing the electric power to the electronic device by frictional electrification. The at least one scaly triboelectric membrane includes a keratin and a polyvinyl alcohol, the at least one scaly triboelectric membrane has a first triboelectric surface, and the first triboelectric surface of the at least one scaly triboelectric membrane includes a plurality of scaly layers. Each of the scaly layers is arranged in order and extends along an orienting direction. A distal end of each of the scaly layers has a plurality of saw-tooth structures.

Abstract: A circuit board assembly includes a main board, a daughter board, a metal bracket, and a conductive gasket. The daughter board includes a circuit board and an electronic module with a plurality of pins connected to the circuit board. The metal bracket clamps at one side of the circuit board and the electronic module to shield the plurality of pins. The metal bracket has a connection part connecting the main board. The conductive gasket is disposed between the metal bracket and the plurality of pins.

Abstract: A circuit board assembly includes a main board, a daughter board, a metal bracket, and a conductive gasket. The daughter board includes a circuit board and an electronic module with a plurality of pins connected to the circuit board. The metal bracket clamps at one side of the circuit board and the electronic module to shield the plurality of pins. The metal bracket has a connection part connecting the main board. The conductive gasket is disposed between the metal bracket and the plurality of pins.