Abstract: A centrifugal heat dissipation fan including a housing and an impeller disposed in the housing on an axis is provided. The housing has at least one inlet on the axis and has a plurality of outlets in different radial directions. A heat dissipation system of an electronic device is also provided.

Abstract: A manufacturing method of transformer circuit board includes following steps: plate stamping, forming a plurality of metal plates with a stamping mold; primary layering, layering the metal plates that are in alignment with each other between two outer insulation layers, with an inner insulation layer disposed between the two metal plates; primary pressing, hot pressing the metal plates to fix the metal plates between the two outer insulation layers; secondary layering, layering another metal plate on the outer side of the two outer insulation layers, respectively, corresponding to the positions of the previously layered metal plates; secondary pressing, hot pressing the metal plates on the outer side of the outer insulation layers, and printing to form a solder mask layer on the outer insulation layers. Finally, cutting to form a transformer circuit board with low leakage inductance and high EMI shield.

Abstract: An electronic device that can detect and report tampering, comprising: a case, comprising an installation surface, wherein the electronic device is for being installed to an installation position via the installation surface; a battery, located inside the case, configured to provide battery power; a temporary power storage circuit, located in the case; a power off switch, located on the case and coupled between the battery and the temporary power storage circuit, configured to operate in a conductive state while the electronic device is installed at the installation position, and configured to automatically operate in a power off state after the electronic device being removed from the installation position; and a wireless communication circuit, located in the case and coupled to the power off switch and the temporary power storage circuit.

Abstract: An electronic device that can detect and report tampering, comprising: a case, comprising an installation surface, wherein the electronic device is for being installed to an installation position via the installation surface; a battery, located inside the case, configured to provide battery power; a temporary power storage circuit, located in the case; a power off switch, located on the case and coupled between the battery and the temporary power storage circuit, configured to operate in a conductive state while the electronic device is installed at the installation position, and configured to automatically operate in a power off state after the electronic device being removed from the installation position; and a wireless communication circuit, located in the case and coupled to the power off switch and the temporary power storage circuit.

Abstract: A voltage regulator is disclosed. The voltage regulator includes a plurality of energy storage modules, a voltage converter for converting an input voltage into a charging voltage, a time-sharing controller for generating a select signal, and a de-mux coupled to the plurality of energy storage modules, the voltage converter and the time-sharing controller, to sequentially conduct the connections between the voltage converter and each energy storage module of the plurality of energy storage modules according to the select signal, to charge each energy storage module of the plurality of energy storage modules with the charging voltage, and each energy storage module of the plurality of energy storage modules generate a plurality of output voltages after finishing charging.

Abstract: A voltage regulator is disclosed. The voltage regulator includes a plurality of energy storage modules, a voltage converter for converting an input voltage into a charging voltage, a time-sharing controller for generating a select signal, and a de-mux coupled to the plurality of energy storage modules, the voltage converter and the time-sharing controller, to sequentially conduct the connections between the voltage converter and each energy storage module of the plurality of energy storage modules according to the select signal, to charge each energy storage module of the plurality of energy storage modules with the charging voltage, and each energy storage module of the plurality of energy storage modules generate a plurality of output voltages after finishing charging.

Abstract: An on-screen display (OSD) circuit comprises a microprocessor, a serial peripheral interface (SPI) controller, an upload controller and an OSD controller. The SPI controller is connected to the microprocessor for receiving data of an external flash memory. The upload controller is configured to control data access between the SPI controller and the memory. The OSD controller is configured to control a display of an operating screen by the data stored in the memory. The upload controller stores a font table or an icon table and background screen data in the memory while the OSD controller is active.