Abstract: An electronic device includes a motherboard that includes a south bridge, a universal serial bus (USB) 3.0 connector, and a ground module. The south bridge is connected to the USB3.0 connector for transporting USB3.0 signals and USB2.0 signals. The grounded module is connected to the south bridge and the USB3.0 connector. The south bridge is used for controlling the ground module to work. The USB2.0 signals transmit between the south bridge and the USB3.0 connector flow into the ground, while the ground module is working.

Abstract: An electronic device enclosure includes a rear cover, a securing bracket, and a securing assembly. The rear cover includes a hook. The securing bracket includes a latching portion engaged with the hook. The securing assembly includes a securing member and a sliding shaft. The securing member is secured to the securing bracket. The mounting member is movable relative to the securing bracket to slide the sliding shaft. The sliding shaft presses edges of the limiting slot to push the rear cover away from the securing bracket to disengage the hook from the latching portion when sliding.

Abstract: A motherboard includes a power module, a display module, a control module, and a protection module. The protection module is coupled to the power module, the display module, and the control module. The control module is capable of outputting a first control signal to control the protection module to connect the power module to the display module to be powered by the power module or disconnect the power module from the display module.

Abstract: A protection circuit is coupled to a switch circuit of a machine tool for protection. The protection circuit comprises a fatigue protection unit and a misoperation protection unit. The fatigue protection unit comprises a first sensor, a first processor, a first controller, and an alarm module. The misoperation protection unit comprises a second sensor, a second processor, and a second controller. The protection circuit senses the degree of fatigue and the misoperation of people through the fatigue protection unit and the misoperation protection unit, then controls the machine tool to work or not to work to avoid accidents.

Abstract: A charging circuit for a USB port includes a first connector, a second connector, and a voltage booster circuit. The first connector includes a first power pin. The second connector includes a second power pin. The voltage booster circuit is connected between the first connector and the second connector. The voltage booster boosts a voltage provided by the first power pin of the first connector and provides the boosted voltage to the second power pin of the second connector to charge an electronic device.

Abstract: An electronic device includes a platform controller hub and a charging interface. The charging interface includes a connector for coupling to a peripheral device, and a charging integrated circuit coupled to the connector. The connector includes an insert detecting member for detecting if the peripheral device is inserted. The charging integrated circuit can provide power to the connector. The platform controller hub can exchange data through the connector through the charging integrated circuit. The charging integrated circuit can cut off the power to the connector when the insert detecting member detects that no peripheral device is inserted in the connector.

Abstract: An alarm circuit for electronic device includes a detection unit, a signal conversion circuit, and an alarm control circuit. The detection unit is configured to detect a working status of an electronic device, and output a control signal of a first voltage level when the detection circuit determines the presence of smoke in the electronic device. The signal conversion circuit is configured to receive the control signal of the first voltage level, and convert the control signal of the first voltage level to an alarm signal of a first voltage level. The alarm control circuit is configured to receive the alarm signal of the first voltage level and transmit an alarm.

Abstract: A supporting base for an electronic device includes a mounting plate and two standing pieces. The two standing pieces are rotatably fixed to the mounting plate. The two standing pieces can rotate from a closed position to an open position. When the two standing pieces are in the closed position, the mounting plate supports the electronic device in a first manner. When the two pieces are in the open position, the two pieces clamp the electronic device in a second manner. An electronic device assembly is also provided.

Abstract: A framework for forming an electronic display includes a primary electronic device, at least one coupling electronic device, and at least one secondary electronic device. The primary electronic device includes a system on a chip electronically coupled to a display screen of the primary electronic device. The at least one coupling electronic and the at least one secondary electronic device each includes an integrated circuit and a corresponding display screen. Each electronic device includes at least one connector configured to electronically couple to the connector of another electronic device. The system on a chip of the primary electronic device controls the display screen of each of the electronic devices to display a portion of the electronic display.

Abstract: A DC power supply control system includes a voltage conversion module configured to couple to a DC power supply and convert a DC voltage to a power voltage; a power port coupled to the voltage conversion module and configured to be coupled to a peripheral load; a switch module coupled to the voltage conversion module and configured to switch on/off the voltage conversion module; and a detection module coupled to the power port and configured to detect the peripheral load. When the detection module detects the peripheral load, the switch module switches on the voltage conversion module, allowing the DC voltage to be converted to the power voltage. Without a peripheral load being detected by the detection module, the switch module switches off the voltage conversion module. A DC power supply control circuit is further disclosed.

Abstract: A rotational speed control system includes a fan controller and a fan controlling circuit. The fan controlling circuit is coupled to the fan controller. The fan controlling circuit can receive a rotational speed control signal and output a fan driving signal to the fan controller. The fan driving signal is a regulated high level voltage signal. The fan controller can adjust rotational speed of the fan according to the driving signal.

Abstract: A computer system includes a display, a motherboard and a power circuit. The display includes a video interface. The motherboard includes a super input-output (SIO) chip. The power circuit includes a first switch unit, a second switch unit, a third switch unit, and an oscillator. When the display is powered on, the video interface outputs a high level signal, the first switch unit is turned on, a power supply powers the oscillator through the first switch unit. The oscillator operates and outputs a high level signal, the second switch unit is turned on, a power-on signal pin of the SIO chip receives a low level signal, and the motherboard is turned on.

Abstract: A speaker includes a shell and a vibration device. The vibration device is fixed on the shell. The shell defines a closed space. The closed space is filled with gas. The vibration device can drive the shell to vibrate to produce sound. A speaker is also provided.

Abstract: A serial input/output (SIO) device with a serial peripheral interface (SPI) bus gateway controller. The gateway controller retrieves operation code (opcode) from a signal from the SPI bus and an address number from the signal; the gateway controller further compares the retrieved opcode with a restrict opcode, the retrieved address number with a restrict address number. When either the retrieved opcode matches the restrict opcode, or the retrieved address number matches the restrict address number, the gateway controller blocks the signal.

Abstract: A multiple device integrating control method, includes: detecting whether a first connection port of an electronic device is connected to a first device; determining whether a power port of the electronic device is connected to a power adapter when the first connection port is connected to the first device; and driving a processor of the first device to work and cooperate with a processor of the electronic device to compute.

Abstract: A plug connector includes a case and a securing portion located in the case. The case is configured to receive a coupling end of a socket connector and includes two opposite sidewalls. The securing portion has a plurality of resilient pins configured to electronically couple to the socket connector. An inner surface of each sidewall is configured to abut against a side surface of the coupling end. Each sidewall defines a positioning slot extending outwardly from the inner surface of the sidewall. The positioning slot is configured to engage a positioning block extending from the coupling end. A socket connector matched to the plug connector and a connector assembly including the plug connector and the socket connector are further provided.

Abstract: A method for unlocking a display screen of an electronic device includes activating the display screen which is locked of the electronic device when receiving a communication signal from a key, and generating an unlocked icon on the display screen. A request is sent to the key for generating first audio information after the unlocked icon is pressed, and the first audio information of an unlock code is received from the key. When the first audio information is the same as second audio information generated by a decryption algorithm stored in the storage device of the electronic device, the display screen of the electronic device is unlocked.

Abstract: A protection circuit to prevent power-on operations for a motherboard includes a first power supply, a spring mechanical switch attached to a chassis of an electronic device, a plurality of second power supplies with different voltages, and a plurality of electronic switches. The spring mechanical switch includes a first terminal coupled to the first power supply, and a second terminal grounded. First pins of the electronic switches are coupled to the first terminal, second pins of the electronic switches respectively are coupled to the second power supplies, third pins of the electronic switches are capable of powering the motherboard. When the cover is detached from the chassis, the mechanical switch rebounds, the first terminal disconnects and the second terminal are disconnected, the electronic switches are turned off, no voltages output from the third pins of the electronic switches.

Abstract: A server case includes a shell defining an opening, a door, and a connection member. The connection member includes a sliding portion and a rotation portion. The sliding portion is slidable and connected to the door. The rotation portion is slidably engaged with the shell. The sliding portion slides on the door to drive the rotation portion to slide in the shell to make the door move from a position where an angle between the door and the opening is greater than 90 degrees to shield the opening.

Abstract: An interface mounting device includes a circuit board with a connector and a bracket configured to receive an interface device and including a hook. The circuit board defines an installation opening and a cutout extending from an edge of the installation opening. The bracket is received in the installation opening. The hook is engaged with the circuit board through the cutout. The bracket defines a guiding slot aligned with the connector. The guiding slot is configured for a coupling portion of the interface device to pass through and coupling to the connector. A printed circuit board assembly with the interface mounting device is also provided.