Abstract: A storage expansion system includes an expansion apparatus and a serial advanced technology attachment dual in-line memory module (SATA DIMM) device. A memory slot, a SATA port, a SATA signal expansion member, and a voltage converter are arranged on the expansion apparatus. The memory slot includes first power pins, first ground pins, and first signal pins connected to the SATA signal expansion member. A first edge connector is arranged on a side of the expansion apparatus. The first edge connector includes second power pins and second ground pins. The first and second power pins are connected to the voltage converter. A second edge connector is arranged on a bottom side of the SATA DIMM device. The second edge connector includes third power pins connected to a control chip and storage chips, third ground pins, and second signal pins connected to the control chip.

Abstract: A power supply circuit includes a connector for a fan, a speed adjusting circuit, a speed feedback circuit, a control module, first and second power sources, and a switching module. The speed adjusting circuit is connected to a modulation pin of the connector. The speed feedback circuit is connected to a speed pin of the connector. The control module receives a speed signal from the fan through the speed feedback circuit and outputs signals correspondingly. The switching module selects the first or the second power source to supply power for the fan according to the signals from the control module.

Abstract: A power control device includes a connector, a detecting module, a control module, a first output module, a second output module, a first switch module, and a second switch module. The detecting module measures a current and outputs different signals according to a comparison result between the current and a preset value. The first output module and the second output module are selectively used to supply power for the connector according to a value of the current.

Abstract: A laser cutting device is configured for cutting an original product. The original product includes a stub bar and an optical element. The laser cutting device includes a support member and a cutting member. The original product is moveably placed on the support member. The cutting member includes a checking unit and a laser cutting unit, and defines a cutting area. The checking unit checks whether the original product moves in the cutting area. The laser cutting unit cuts the original product, thereby separating the stub bar from the optical element if the original product moves in the cutting area.

Abstract: A support for a display which allows for the safe supply of electrical power when the display is reoriented includes a mounting board for mounting a display and a rack. The rack includes a power port and a power rail electrically connected to the power port. A slip assembly is slidable mounted on the rack. The mounting board is secured on the slip assembly. The slip assembly includes a conduction piece which is electrically connected to a display. The conduction piece is in electrical contact with different portions of the power rail when the slip assembly slides on the rack.

Abstract: A fan control system includes an AC power supply, a fan module, a switch control module, a switch unit, and a control module. The control module includes a number of outputs. The switch unit includes a number of switches. The switch control module includes a number of relays. The control module outputs a high voltage or a low voltage to control the number of relays via the number of switches to change a rotating speed of the fan module.

Abstract: An over-current protection device is provided. A first end of a first resistor is coupled to a voltage input terminal and a second end of the first resistor is coupled to a control terminal of an electronic switch. A detecting pin of a control chip is coupled to the second end of the first resistor and an input pin of the control chip is coupled to the first end of the first resistor. A control pin of the control chip is coupled to a control terminal of the electronic switch. The voltage output terminal is coupled to a first terminal of the electronic switch. The control chip compares a preset current value saved therein with a detecting current passing through the first resistor. If the detecting current is greater than the preset current value, there is no voltage output from the voltage output terminal.

Abstract: In a method for removing interferential signals of a mobile device, an original communication signal waveform of the mobile device is acquired. A differential signal waveform corresponding to each signal frame in a group is generated, and a DPPPV of the differential signal waveform is acquired. The differential signal is determined to be an interferential signal, in response to that the DPPPV is not less than a calculated differential threshold value, and a DNPPV at a target time point is not less than a preset ratio of the DPPPV. A signal interference section is determined and compensation values corresponding to the signal interference section is calculated, to generate a differential compensation waveform of the signal frame. An integrated differential compensation waveform of all signal frames and the original communication signal waveform are incorporated to obtain a processed signal waveform without interferential signals.

Abstract: A power circuit for an electronic device includes an input terminal, an output terminal, a voltage transform unit, and a control unit. The control unit controls the voltage transform unit to operate or not operate, according to the input terminal receives a first voltage or a second voltage. The first voltage is transformed to an output voltage, and is output by the output terminal, when the input terminal receives the first voltage. The second voltage is transmitted from the input terminal to the output terminal through the third switch unit, when the input terminal receives the second voltage. Therefore, the power circuit can receive the first voltage or the second voltage through the input terminal, and outputs the output voltage to other electronic components.

Abstract: An electronic apparatus includes a rack, a chassis slidably moved into the rack, and a fixing assembly. A positioning hole is defined near a front edge of the rack. The fixing assembly includes a fixing device fixed on a front wall of the chassis, a pushing member rotatably coupled with a lower portion of the front wall, and a threaded member. The pushing member includes a pushing tip capable of extending into the positioning hole. A rotary member and a sliding member are assembled in the fixing device; an elastic member is disposed between the fixing device and the sliding member. The rotary member defines a threaded hole; the threaded member extends through the pushing member to engage in the threaded hole. A number of teeth extend from a periphery of the rotary member, a bulge of the sliding member and is capable of insetting between two adjacent teeth.

Abstract: An electronic device housing includes a first housing, a second housing, a limiting member, and a fastening member. The first housing includes a bottom wall, a top wall, and a sidewall coupling the bottom wall and the top wall. The bottom wall, the sidewall, and the top wall cooperatively define a receiving chamber. The top wall of the first housing defines a limiting hole. The second housing is adhered to the first housing and received in the receiving chamber. The second housing includes a top surface and a bottom surface. The top surface and the bottom surface are adhered to the corresponding top wall and bottom wall. The limiting member is inserted in the limiting hole and resists against the top surface of the second housing. The fastening member couples the top wall of the first housing and the top surface of the second housing.

Abstract: A circuit board mounting apparatus includes a circuit board, a first mounting member, a second mounting member, and a third mounting member. The first and second mounting members are mounted to a front side of the circuit board. The third mounting member is mounted to a rear side of the circuit board. The circuit board is capable of being mounted to a first side plate of a first chassis in a perpendicular manner by the first and second mounting members, or is capable of being mounted to a second side plate of a second chassis in a parallel manner by the first, second, and third mounting members.

Abstract: An electronic device includes an enclosure, a display module, a key part, and a water proof structure. The water proof structure seals a first gap between the display module and enclosure and a second gap between the display module and the key part and drains water which flows into the enclosure to the outside of the enclosure.

Abstract: An electronic device includes a base, and a lighting apparatus mounted to the base. The lighting apparatus includes a bracket mounted to the base, a pivoting member pivotably attached to the bracket, and a lighting unit fixed in the pivoting member. The pivoting member is pivoted out of the bracket to expose and turn on the lighting unit. The pivoting member is pivoted into the bracket to cover and turn off the lighting unit.

Abstract: A voltage detecting system is configured for detecting a voltage supplied to an electronic device. The voltage detecting system includes a voltage measuring circuit configured to measure the voltage, a voltage converting circuit electrically coupled to the voltage, and a voltage comparing circuit. The voltage measuring circuit has a first measuring range and a second measuring range that is wider than the first measuring range. The voltage converting circuit is capable of the converting the voltage to an output voltage according to a predetermined ratio. The voltage comparing circuit compares the output voltage with a reference voltage. If the output voltage is greater than the reference voltage, the voltage comparing circuit informs the voltage measuring circuit to select the second measuring range. If the output voltage is not greater than the reference voltage, the voltage comparing circuit informs the voltage measuring circuit to select the first measuring range.

Abstract: An air duct mounted to a fan having an end board includes a top board which defines an opening, through which the fan is extended. Two opposite blocking members extend up from the top board at opposite first sides of the opening. Two opposite limiting members extend up from the top board at opposite second sides of the opening. Each blocking member includes a tab to block a top of the end board of the fan. Each limiting member includes a projection to abut a bottom of the end board of the fan.

Abstract: A mounting apparatus for securing a battery module to an enclosure includes a bracket and a latching member. The bracket is secured to the enclosure and defines a receiving space for receiving the battery module. The latching member is attached to the bracket and includes a resilient portion and a blocking flange perpendicularly connected to the resilient portion. The blocking flange is engaged with the battery module to prevent the battery module from disengaging from the receiving space, and the resilient portion is resiliently deformable to disengage the blocking flange from the battery module so that the battery module is easily installed or detached from the enclosure without extra tools.

Abstract: An electronic device includes a housing, a display panel, and engagement mechanisms. The housing includes a plurality of fixing blocks placed on corners. Each fixing block defines a blind hole and two grooves set on opposite sides of the blind hole. The display panel includes a plurality of corners. Corners outwardly extend to form first extending portions. Each extending portion defines a positioning hole. The engagement mechanisms each comprises a connection portion, a positioning post fixed to a first surface of the connection portion facing the display panel and housing, and two springs fixed to the first surface of the connection portion and set on opposite sides of the positioning post. The positioning posts pass through the positioning holes and are received into the blind holes, each spring is pressed by an external force to engage with one of the grooves to fix the display panel to the housing.

Abstract: An antistatic device includes a main body, a first conductive member, and a second conductive member. The main body with a first surface has a first annular groove and a second surface, opposite the first surface, has a second annular groove. The first conductive member, with a first end is in contact with a camera assembly of an electronic device and a second end, opposite the first end, is positioned in the first annular groove. The second conductive member, with a first end is positioned in the second annular groove and a second end, opposite the first end, is in contact with the conductive potion of a housing of the electronic device. Static electricity from the camera assembly is conducted from the camera assembly through the first conductive member to the main body and from the main body through the second conductive member to the conductive portion of the housing.

Abstract: An electronic device includes a housing and an electronic card connector fixed on the housing. The electronic card connector includes a tray and a fixing member. The tray includes a main body defining a card slot. The tray further includes two elastic arms protruding from two sidewalls of the tray respectively. The elastic arms include protrusions. The fixing member includes two notches corresponding to the two protrusions. When the main body receives in the second accommodating space, each of the two protrusions receives in one of the two notches respectively to engage the tray with the fixing member. When a pressure applied on the two elastic arms to enable the two protrusions to disengage from the two notches, the tray is disengaged from the fixing member.