Abstract: An electronic device can conveniently change and assemble a heat dissipation apparatus which is received in the electronic device and dissipates heat for the electronic device. The electronic device with a fan heat dissipation apparatus can be replaced by a blower heat dissipation apparatus, without changing a chassis of the electronic device.

Abstract: An adaptor for a memory card includes a printed circuit board (PCB) conversion board, a memory card connector, a serial interface connector, a signal convertor, and a parallel interface connector. When a motherboard is connected to the serial interface connector, serial signals output from the motherboard are transmitted to the signal convertor via the serial interface connector. The signal convertor converts the serial signals into parallel signals and transmits the parallel signals to the memory card. When the motherboard is connected to the parallel interface connector, parallel signals output from the motherboard are transmitted to the memory card via the PCB conversion board without any parallel-to-serial signal conversion.

Abstract: A heat dissipating device includes a heat sink, a fan, and a fixing bracket. The fixing bracket includes a first fixing element and a second fixing element mounted to the first fixing element. An airflow opening is defined in each of the first and second fixing elements. A receiving space communicating with the airflow openings is bounded by the first and second fixing elements, to receive the heat sink. The first and second fixing elements are used to selectively mount the fan.

Abstract: A fixing apparatus is provided for retaining a heat sink to a circuit board. The fixing apparatus includes a mount fixed to the circuit board, two locking members attached to the mount, and a clip. The mount defines a receiving hole accommodating the heat sink. The clip includes a positioning portion abutting against the heat sink, and two retaining arms extending from opposite ends of the positioning portion. The positioning portion presses the heat sink against the circuit board in response to the retaining arms engaging with the locking members.

Abstract: A power supply assembly includes two brackets, a fan detachably mounted between the brackets, and a main body. Each bracket includes an elastic member extending from an end of the bracket. The main body includes a receiving space, and two opposite mounting walls bounding the receiving space. The brackets together with the fan can be detachably mounted to the main body via being received in the receiving space and the elastic members engaging with the mounting walls.

Abstract: A circuit for driving a light emitting diode (LED), the circuit includes a timer, first to third electronic switches, and a regulator. The timer provides a pulse signal to switch the first and second electronic switches. The first electronic switch provides a first level signal to one end of the LED. The second electronic switch switches the third electronic switch on and off. The third electronic switch provides a third level signal to another end of the LED. The regulator adjusts the pulse signal to be at a predetermined frequency to control the first, second, and the third level signals to alternate between a high voltage level and a low voltage level at the predetermined frequency. The LED is driven to be on and off at the predetermined frequency by the first and third level signals.

Abstract: An electronic device includes a first power supply unit, a second power supply unit, and a control circuit. The control circuit connected between the first power supply unit and the second power supply unit is configured for detecting an output power of the first power supply unit, and comparing the output power with a rated power of the first power supply unit. When the output power exceeds the rated power of the first power supply unit, the control circuit allows the second power supply unit to power the electronic device.

Abstract: A heat dissipating apparatus includes a heat sink, a blower, and a fan. The blower and the fan can be mounted together via a connection element. The heat sink defines an accommodating space. The blower and the fan can be positioned to the heat sink via the connection element, with the blower being accommodated in the accommodating space. The heat dissipating apparatus can achieve an optimal heat dissipating effect.

Abstract: A cabinet is provided for electronic devices. The cabinet includes a rack receiving a plurality of electronic device, and a climbing platform. The climbing platform includes a receiving member installed in the rack, and a folding stepladder slidably received in the receiving member. The folding stepladder is pulled out from the receiving member and unfolded to become a ladder.

Abstract: A mounting apparatus is provided for mounting a fan in a chassis defining an exhaust opening in an end wall thereof. The mounting apparatus includes a frame adapted to receive the fan, and be inserted into or drawn out of the chassis via the exhaust opening. The frame includes at least one resilient lock plate. The at least one resilient lock plate releasably abuts against the end wall of the chassis to prevent the frame sliding out of the chassis.

Abstract: A heat dissipation apparatus includes a heat sink, a fan, and a fixing structure. The fan defines a number of fixing holes. The fixing structure includes a base, two resilient side panels bent from two sides of the base. The base and the side panels bound an accommodating space to accommodate the fan. An airflow opening is defined in the base for allowing air to flow between the heat sink and the fan. First ends of a number of fasteners secure the base of the fixing structure to the heat sink. Second ends of the number of fasteners protrude through the base into the accommodating space, to be accommodated in the corresponding fixing holes of the fan.

Abstract: A latch mechanism includes a press portion, two connection portions, and two latch portions. The two connection portions are connected to opposite ends of the press portion correspondingly. Each connection portion includes two connectors. First ends of the two connectors are connected together to form a coupling end to connected to a corresponding end of the press portion. Each latch portion is selectively connected to the second end of one of the two connectors of a corresponding connection portion.

Abstract: A testing apparatus for a motherboard design includes a plurality of electrical elements. The testing apparatus includes a body, a plurality of heat source modules, and a power source terminal. The plurality of heat source modules is positioned on the body and produce heat to simulate the electrical elements of the motherboard. The power source terminal is connected to the plurality of heat source modules via cables and connected to a power supply. When the power supply is turned on, the power supply provides working voltages to the heat source modules to signal the heating source modules to simulate the heat production of the electrical elements of the motherboard design.

Abstract: An automatic shut off apparatus for an electronic device includes an input circuit, a timing circuit, a control circuit, and a switch circuit. The input circuit is to receive a designated power-off time delay for the electronic device. The control circuit is to receive the designated power-off time delay from the input circuit, and output a control signal. The timing circuit is to time according to the control signal, and output an instruction signal in response to designated power-off time being reached. The switch circuit is to shut off power of the electronic device according to the instruction signal.

Abstract: A power supply assembly includes two brackets, a fan detachably mounted between the brackets, and a main body. Each bracket includes an elastic member extending from an end of the bracket. The main body includes a receiving space, and two opposite mounting walls bounding the receiving space. The brackets together with the fan can be detachably mounted to the main body via being received in the receiving space and the elastic members engaging with the mounting walls.

Abstract: An adjustable air filter for a computer, includes a bracket, a plurality of frames with air filter units set therein rotatably mounted to the bracket, a first transmission bar connected with each of the frames, a second transmission bar rotatably mounted to the bracket and connected with the first transmission bar, and a driver fixed to the bracket with a shaft retractably extending therefrom. The first transmission bar drives the frames to rotate when the first transmission bar is moved. The second transmission bar drives the first transmission bar to move when the second transmission bar is rotated. The shaft of the driver is connected with the second transmission bar. The driver drives the shaft to extend out or draw back according to the temperature in the computer to drive the second transmission bar to rotate.

Abstract: A test apparatus for supporting compatibility testing between a motherboard and a number of power supply units includes a plug, a number of sockets, and a microprocessor. The plug is configured for connecting to the motherboard. The number of sockets is configured for connecting to the number of power supply units. The microprocessor is connected to the plug and the number of sockets, and is capable of turning on or turning off the number of power supply units, according to a power supply on signal received from the motherboard.

Abstract: An adaptor for a memory card includes a printed circuit board (PCB) conversion board, a memory card connector, a serial interface connector, a signal convertor, and a parallel interface connector. When a motherboard is connected to the serial interface connector, serial signals output from the motherboard are transmitted to the signal convertor via the serial interface connector. The signal convertor converts the serial signals into parallel signals and transmits the parallel signals to the memory card. When the motherboard is connected to the parallel interface connector, parallel signals output from the motherboard are transmitted to the memory card via the PCB conversion board without any parallel-to-serial signal conversion.

Abstract: A fixing apparatus is provided for retaining a heat sink to a circuit board. The fixing apparatus includes a mount fixed to the circuit board, two locking members attached to the mount, and a clip. The mount defines a receiving hole accommodating the heat sink. The clip includes a positioning portion abutting against the heat sink, and two retaining arms extending from opposite ends of the positioning portion. The positioning portion presses the heat sink against the circuit board in response to the retaining arms engaging with the locking members.

Abstract: An exemplary mounting apparatus is for adjustably fixing a light guide pipe in a chassis of an electronic device. The chassis includes a mounting plate. The mounting apparatus includes a first sleeve engaging with the light guide pipe, a second sleeve attached to the mounting plate, and a resilient member disposed between the first sleeve and the second sleeve.