Abstract: A remote control circuit includes a rectifying filter circuit coupled to an alternating current (AC) power source, a power supply module connected to the rectifying filter circuit; a leakage energy collecting circuit connected to the rectifying filter circuit; a remote control signal receiving circuit connected to the leakage energy collecting circuit; and a switch circuit connected to the remote control signal receiving circuit and the power supply module. When the remote control signal receiving circuit receives a remote power on signal, the remote control signal receiving circuit outputs a first signal to the switch circuit, and the switch circuit switches on the power supply module. When the remote control signal receiving circuit receives a remote power off signal, the remote control signal receiving circuit outputs a second signal to the switch circuit, the switch circuit switches off the power supply module.

Abstract: A testing tray includes a receiving member and a connector. The receiving includes a tray and a latching member. The tray includes a bottom wall, a peripheral sidewall protruded from the bottom wall, a resisting member and a guide groove. The resisting member includes a resisting portion and two elastic portions coupling the resisting portion with the peripheral sidewall. The tray includes at least one latching portion protruded from the peripheral sidewall. The latching member includes a sliding portion slidably mounted on the bottom wall to cover the guide groove and an elastic member located between the sliding portion and the bottom wall. The connector includes a fixed member detachably mounted on the at least one latching portion and a conducting member detachably mounted on the fixed member. The conducting member is capable of coupling the electronic device with a testing device.

Abstract: An exemplary electronic device includes a mother board, a power source, and a power extending board detachably connected between the power source and the motherboard. The power source includes a golden finger interface. The power extending board includes a receiving socket, a first conversion circuit, and a first connector. The golden finger interface is plugged into the receiving socket. The first conversion circuit is connected to the receiving socket, converts first and second voltages from the power source into third and fourth voltages, and outputs the first, third, and fourth voltages to the motherboard.

Abstract: An expansion control circuit includes a delay circuit coupled to a first expansion module and a switching circuit coupled to a second expansion module. The switching circuit includes a buffer and a switching module. The buffer is coupled to the first expansion module. The first expansion module outputs a first control signal upon being switched on and outputs a second control signal after a working time. The delay circuit outputs a disconnecting signal upon being switched on. The buffer is switched off upon receiving the disconnect signal. The delay circuit further outputs a connecting signal after a delay time after outputting the disconnecting signal. The buffer is switched on upon receiving the connect signal. The buffer further outputs the second control signal to the switching module upon being switched on. The switching module controls the second expansion module to be switched on v receiving the second control signal.

Abstract: A control circuit for controlling a cooling fan is defined in a data center. The control circuit includes a cooling fan, a controller, a switch unit, and a control unit. The controller is configured to generate a first pulse width modulation (PWM) signal for controlling the cooling fan to rotate at a first speed and the control unit is configured to generate a second PWM signal for controlling the cooling fan to rotate at a second speed. The switch unit is configured to output the first PWM signal to the cooling fan when the data center is in an active mode and configured to output the second PWM signal to the cooling fan when the data center is in a standby mode.

Abstract: In a method for unlocking a screen of a mobile device, at least one user-specific number is set and stored into a storage unit of the mobile device. The user-specific number is read from the storage unit and displayed on the screen for selection by a user, when the screen is locked because of input of a wrong password. An unlocking request is transmitted to a terminal providing the selected user-specific number. The mobile device communicates with the terminal, and receives a confirmation message from the terminal, and the screen is unlocked according to the confirmation message.

Abstract: An electronic device includes a number of hard disk devices, a detection system, and a power supply. The detection system includes a detection device, a controller, and an emergency power supply. The power supply is coupled to the hard disk devices and the detection system, to power the hard disk devices and the detection system. The emergency power supply is coupled to the controller and the display device, to power the controller and the display device. The controller is coupled to the detection device and the display device. The detection device detects data of the hard disk devices and transmits the data to the controller. The controller receives the data from the detection device, and transmits the data to the display device. The display device displays the data.

Abstract: A mounting apparatus includes a bottom plate, a supporting frame supported by the bottom plate for receiving a HDD, a receiving frame attached to the bottom plate, a latching member slidably coupled to the supporting frame, and a first elastic member coupled with the latching member. The supporting frame includes a base plate detachably engaging with the bottom plate, two opposite side plates each defining at least one through hole, two pivoting plates pivotably coupled to the side plates, and an extending plate defining an opening. The latching member includes an inserting block to extend through the opening of the extending plate under a resilient force of the first elastic member. Each pivoting plate includes at least one inserting post for extending through the through hole of the corresponding side plate and engaging in the HDD.

Abstract: A cabinet for installing first servers or second servers different than the first servers in size, and the cabinet includes a frame and four adjusting assemblies respectively installed to four corners of the frame. Each adjusting assembly includes a first mounting bracket fixed to the frame and a second mounting bracket rotatably connected to the first bracket. When the second bracket is rotated to being received in the first bracket, the first servers can be installed to the first bracket. When the second bracket is rotated away from the first bracket, the second servers can be installed to the second bracket.

Abstract: An electronic device includes a chassis having a plurality of sides, a bezel located at an end of the chassis, two fixing members fastened to opposite sides of the chassis, and two slide members. Each slide member is respectively slidably attached to the corresponding fixing member. The bezel is slidably sandwiched between the two slide members. The bezel is configured to rotate relative to the slide members. The bezel includes a pair of hooks formed at two opposite ends thereof and configured to be releasably latched by the two fixing members.

Abstract: A storage device includes a primary storage extension chip, a plurality of secondary storage extension chips, and a plurality of resistors. Each of the storage extension chips includes two data pins, a plurality of general purpose input/output (GPIO) pins, and a firmware. Each of the GPIO pins is connected to a power terminal through one resistor, and is grounded through a resistor, for setting a firmware version number of storage extension chips. The primary storage extension chip determines whether the version number of each secondary storage extension chip is same as that of the primary storage extension chip. If the version number is different from that of the primary storage extension chip, the firmware version number of the primary storage extension chip is applied to the secondary storage extension chip.

Abstract: A mounting apparatus, able to maintain the relative position of a camera during rotations between portrait and landscape presentations of an electronic device, includes a camera. The mounting apparatus is mounted to an electronic device, which has a display screen. When the electronic device is rotated from a first presentation state to a second presentation state, the camera remains in position above the display screen.

Abstract: A mounting device for a display module includes a positioning member and an installation member. The positioning member includes a limiting portion and a positioning piece. The limiting portion defines a first receiving slot. The positioning piece defines a cutout. The installation member is secured to the positioning member and includes an elastically deformable limiting block. The installation member defines a second receiving slot and a limiting slot. A limiting rib is located on the limiting block and in the limiting slot. The first receiving slot and the second receiving slot rotatably receive a rotating shaft of the display module therebetween. The limiting block abuts a connecting shaft connected to the rotating shaft and blocks the connecting shaft in the limiting slot. The cutout is adapted to receive the connecting shaft when the rotating shaft is rotated to rotate the connecting shaft out of the limiting slot.

Abstract: A switchable voltage regulation circuit includes a power supply chip and a voltage regulation module. The voltage regulation module includes first and second resistors and first and second switch units. A first terminal of the first resistor is electrically coupled to a power supply and a first output pin of the power supply chip. A first terminal of the second resistor is electrically coupled to the second terminal of the first resistor. The first switch unit is electrically coupled between the first terminal of the first resistor and the second terminal of the first resistor. The second switch unit is electrically coupled between the first terminal of the second resistor and the voltage output. By manual switching, or by transistors under control of a baseboard management unit, the resistances can be switched in or switched out to regulate the voltage.

Abstract: A booting system includes a control module, a voltage regulation module, a complex programmable logic device (CPLD), and a power supply unit (PSU). The control module is configured to output a booting signal. The CPLD is coupled to the control module for receiving the booting signal and is configured to sense status of the voltage regulation module, a power control signal is outputted from the CPLD when the CPLD receives the booting signal and status of the voltage regulation module are normal. The PSU is coupled to the CPLD for receiving the power control signal from the CPLD and outputs a power signal for booting up a computer.

Abstract: An optical fiber connector includes a fiber fixing unit configured for holding the optical fiber, a ferrule configured for receiving an end of the optical fiber, and a housing receiving and connected to the fiber fixing unit and the ferrule. The housing includes side walls, the side walls cooperatively form an end surface adjacent to the fiber fixing unit, the side walls define two opposite releasing slots, the releasing slots penetrate through the side walls along a direction parallel to the end surface and are open at the end surface.

Abstract: An electronic device includes a printed circuit board (PCB), an antenna and a switch. The antenna is printed on the PCB. The antenna includes multiple key contacts. Each of the multiple key contacts includes a first terminal, a second terminal and a third terminal. The first terminal is an output terminal. The second terminal and the third terminal are connected in series in the antenna. The switch switches the electronic device to an input mode and an antenna mode, thus the electronic device can be alternatively switched to an input function or a communication function.

Abstract: An assembly device for assembling an optical fiber connector is provided. The assembly device includes an assembling tool and a clamping assembly. The assembling tool is configured to slide a locking member of the optical fiber connector. The clamping assembly is loaded on the base seat for gripping the optical fiber connector. The assembling tool comprises a base portion and a pair of elastic arms extending from opposite ends of the base portion. The elastic arms is capable of engaging with a pair of gripping portions of the locking member through a pair of sliding grooves defined in an inner housing of the optical fiber connector and a pair of operating grooves defined in an outer housing of the optical fiber connector to drive the locking member to slide along the support member to grip or unlock the optical fiber.

Abstract: An audio control circuit receives analog audio signals and digital audio signals via an audio signal input interface. The audio control circuit includes an audio codec chip, a first control circuit, a first switch circuit, a second control circuit, and a second switch circuit. The first control circuit obtains the analog audio signals from the audio signal input interface and converts the analog audio signals into first control signals to control the first switch circuit turned on and off. The second control circuit obtains the digital audio signals from the audio signal input interface and converts the digital audio signals into second control signals to control the second switch circuit turned on and off. The audio codec chip receives the analog audio signals in response to the first switch turned on and receives the digital audio signals in response to the second switch turned on.

Abstract: An automobile includes an anti-dazzling system and a luminous body. The anti-dazzling system includes a sensing module, a calculating unit, a controlling module and a display module. The sensing module includes a signal receiver and a recorder. The signal receiver defines a through hole and a signal receiving chip is received therein. The signal receiving chip can receive infrared light through the hole. The recorder can obtain an emitting time and a receiving time of the infrared light, and send the emitting time and the receiving time to the calculating unit. The calculating unit calculates a size and a location of the display module to be shielded, and sends the size and the location of area to be shielded to the controlling module to control the correspondingly area of the display module being opaque or translucent. The present disclosure also provides an anti-dazzling method.