Abstract: An adjusting apparatus is provided for a projector having a base. The adjusting apparatus includes a supporting member and a rotating member. The supporting member is partially received in the base of the projector and movably coupled to the base. The supporting member forms a plurality of teeth thereon. The rotating member is rotatably coupled to the base of the projector and partially exposed out of the base. The rotating member forms a plurality of teeth mating with the teeth of the supporting member, when the rotating member is rotated in either of two directions, the base of the projector correspondingly moves up and down relative to the supporting member.

Abstract: An exemplary sound box with USB interface includes a power system and a USB interface. The power system includes a power terminal and a ground terminal. The USB interface includes a power terminal and a ground terminal corresponding to the power terminal and a ground terminal of the power system respectively, wherein the power terminal or the ground terminal is connected to the corresponding terminal of the sound box via a rheostat. A voltage received by the power system from the USB interface can be adjusted by the rheostat.

Abstract: A light-emitting keyboard includes an upper cover with a plurality of keystrokes, a printed circuit board (PCB) connected to a connector via a cable, a lower cover, and an electric luminescent (EL) plate connected to the PCB via a transformer. The transformer is configured for receiving power from the PCB. The EL plate is arranged between the upper cover and the lower cover. The upper cover and the keystrokes are made of transparent material.

Abstract: A portable projector screen assembly includes a roller, two cylinders slidably connected to two ends of the roller respectively, a collapsible member connected to the roller, and a screen. The collapsible member includes a plurality of interconnected pieces. Two free ends of the collapsible member are fixed to free ends of the cylinders respectively. The screen includes a plurality of fixing portions, and the fixing portions are respectively connected to joints of each two pieces of the collapsible member.

Abstract: An adapter includes a first USB interface, a second USB interface, and an audio interface. The first and the second USB interfaces each have a power pin, a first data pin, a second data pin, and a ground pin. The pins of the first USB interface respectively connected to the pins of the second USB interface correspondingly. The audio interface includes a left ear audio pin, a right ear audio pin, and a ground pin. The left ear audio pin of the audio interface is connected to the first data pin of the second USB interface. The right ear audio pin of the audio interface is connected to the second data pin of the second USB interface.

Abstract: An audio adapter includes a first audio interface and a second audio interface. The first audio interface includes a left ear audio pin and a right ear audio pin. The second audio interface includes a left ear audio pin and a right ear audio pin. The left ear audio pin of the first audio interface is connected to the left ear audio pin of the second audio interface via a first variable resistor. The right ear audio pin of the first audio interface is connected to the right ear audio pin of the second audio interface via a second variable resistor.

Abstract: A heat dissipating device for a memory card includes a first dissipation element and a second dissipation element. The first dissipation element is attached to one side of the memory card for dissipating heat generated by the memory card. The first dissipation element defines a hole at an end thereof. The second dissipation element is attached to the other side of the memory card for dissipating heat generated by the memory card. The second dissipation element includes a hook at an end thereof corresponding to the hole, for hooking the hole to allow the second dissipation element to rotatably connected to the first dissipation element.

Abstract: An exemplary monitor includes an LCD, a supporting frame, and a base receiving an optical driver, a power circuit, and a USB hub therein. The LCD is mounted on the supporting frame, which is mounted to the base, the power circuit is configured for providing power to the LCD and the optical driver, the optical driver is connected to the USB hub through a first USB cable, the USB hub is connected to a port of a computer through a second USB cable.

Abstract: A mounting apparatus for a storage device includes a bracket configured for receiving the storage device and including a sidewall defining a through hole therein, a latching member pivotally mounted to the bracket and including a latching protrusion extending through the through hole of the bracket for fixing the storage device, a rotating mechanism connected between the bracket and the latching member to enable the latching member to rotate relative to the bracket, and an elastic member connected between the bracket and the latching member for urging the latching member toward the side wall of the bracket.

Abstract: A mounting apparatus for holding a storage device defining a plurality of mounting holes in a side thereof includes a bracket and a plurality of attaching members. The bracket includes a first sidewall and a second sidewall parallel to the first sidewall, the first sidewall defines a plurality of through holes, corresponding to the mounting holes. Each attaching member includes a base and a protrusion formed on the base, and the base attaches to the outside surface of the first sidewall of the bracket via magnetism generated between the base and the first sidewall, and the protrusions extends though the through holes of the first sidewall and inserts into the corresponding mounting hole of the storage device.

Abstract: An audio circuit arranged in a display includes an audio input connector configured to connect to an audio output connector of a computer to receive audio signals therefrom, an audio input circuit receiving the audio signals, an audio amplifier circuit connected to the audio input circuit to amplify the audio signals, an audio output circuit outputting the amplified audio signals, a first output connector connected to the audio output circuit, a volume adjusting circuit, a micro control unit (MCU) of a motherboard of the display connected to the volume adjusting circuit, and a speaker connected to the first output connector. The volume adjusting circuit receives a control signal from the MCU to control the volume adjusting circuit to adjust the audio signals, and the speaker receives the adjusted audio signals.

Abstract: A method for testing graphics cards is provided. The method utilizes a principle that when an operating system operates under a kernel layer, a CPU of the computer has privileges to execute any instructions, thus, able to perform privileged functions of a graphics card, thereby testing hardware acceleration functions of the graphics card. Utilizing the above method can test self-owned brand graphics cards before the GPU manufactured provides a formal graphics card driver of the graphics cards, and avoids abnormal situations resulting in bad communication between a graphics card test program and an informal graphics card driver of the graphics cards.

Abstract: An exemplary method for testing a video signal generator is provided. The method includes: setting test parameters of the video signal generator to perform a function test; generating signals based on the test parameters through the video generator; controlling a standard measuring apparatus to receive the signals and to convert the signals into test values; determining whether the video signal generator passes the function test by comparing the test values with a standard working range of the video signal generators; and generating a test report based on the test values and the test parameters. A system for testing a video signal generator is also provided. By utilizing the present invention, errors can be reduced and test efficiency can be enhanced.

Abstract: An exemplary keyboard includes at least one lighting circuit and a keypad mounted on the keyboard. The lighting circuit comprises a power source, at least one light emitting diode (LED), and a regulating resistor. The regulating resistor includes an adjustment terminal connected to the power source and a connection terminal connected to the anode of the LED. The cathode of the LED is grounded. The keypad is illuminated by the lighting circuit arranged therein. Therefore, users can adjust illumination of different parts of the keyboard by adjusting the regulating resistors of the lighting circuits arranged therein.

Abstract: An exemplary light-emitting keyboard includes an upper cover with a plurality of keystrokes, a printed circuit board, and a lower cover. The keyboard further includes a light guide plate, a reflector, and a light source. The light guide plate and reflector are arranged between the upper cover and the lower cover, and the light source is arranged beside the light guide plate and connected to the printed circuit board to get power. The light guide plate receives light beams from the light source and evenly distributes the light beams over the entire light guide plate through reflection and diffusion, and the reflector is disposed under the light guide plate for upwardly reflecting light beams from the light source to the light guide plate. Thus, the light-emitting keyboard can be used in a dark or gloomy environment.

Abstract: A fragrance emitting apparatus includes a case, a heat conducting board mounted in the case, a fragrance container disposed in the case and contacting the heat conducting board, a heater disposed in the case and contacting the heat conducting board, and a temperature control apparatus connected to the heater and configured to control the heater to heat the heat conducting board according to the temperature thereof.

Abstract: An electronic time switch control circuit includes a power supply, an oscillation period control module, an oscillator, and a switch control module. The power supply supplies power to the oscillation period module, the oscillator, and the switch control module. The oscillation period module supplies periodic signals to the oscillator. The oscillator alternately outputs two kinds of control signals to the switch control module according to the periodic signals. The switch control module receives the two kinds of control signals, and correspondingly controls an electronic product to be turned on and off repeatedly.

Abstract: A battery testing apparatus includes a charge circuit, a discharge circuit, a computer, and a control circuit. The charge circuit is coupled to a direct current (DC) adapter, the DC adapter charges a battery through the charge circuit. The discharge circuit is coupled to the battery and configured to discharge the battery. The computer records charge/discharge time and charge/discharge cycles of the battery, and calculates capacity and cycle life of the battery according to the time and cycles of charge and discharge. The control circuit has an input terminal coupled to the computer, and a plurality of output terminals respectively coupled to the charge circuit and the discharge circuit, the control circuit controls the charge and discharge circuits charging and discharging the battery.

Abstract: A mounting apparatus is provided to readily fix a data storage device defining at least one hole in place. The mounting apparatus includes a bracket fastened to a computer enclosure, and the bracket includes a side panel and at least one elastic tab formed at or attached to the side panel corresponding to the hole of the data storage device. The elastic tab includes a fixing portion, for engaging in the hole of the storage device, and an operation portion positioned outside the bracket for manipulating the elastic tab.

Abstract: A solenoid test device includes a clock circuit, a control circuit, and an output port configured for coupling to two ends of a solenoid. The clock circuit generates a clock signal and sends it to the control circuit. The control circuit periodically and alternately couples one of the two ends of the solenoid to ground via the output port under the control of the clock signal. The solenoid test device is used to generate a periodic control signal to test service life and stability of solenoids.