Abstract: A protective circuit includes a first jack, a second jack, a first control unit, a detecting circuit, and a logic control circuit. The first jack is connected to a power supply, and includes a grounding wire and a live wire. The second jack is connected to a load, and includes a grounding wire and a live wire. The first control unit includes a first relay, the first relay is connected to the live wire of the first jack and the live wire of the second jack. The detecting circuit detects whether the grounding wire of the first jack is grounded, and outputs indication signals accordingly. The logic control circuit outputs a control signal to the first control unit according to the indication signals to turn on/off the first relay, for allowing the live wire of the first jack to be connected to/disconnected from the live wire of the second jack.

Abstract: A monitoring device connects to a serial data line (SDA) and a serial clock line (SCL) of an 12C bus. The monitoring device analyzes the data signals and clock signals transmitted on the 12C bus, samples data signals from the serial data line at time intervals, and stores the sampled data in a storage unit. The data stored in the storage unit is displayed via a display unit or via a computing device connected to the monitoring device.

Abstract: A test system for a motherboard of a camera includes a storage device, a processor, and a terminal device. The storage device pre-stores image signals. The processor is electronically connected between the storage device and the motherboard, and the terminal device is electronically connected to the motherboard. The terminal device pre-stores a plurality of pictures corresponding to the image signals in the storage device. The processor converts the image signals into test signals. The motherboard restores the test signals into images and transmits the images to the terminal device. The terminal device compares the plurality of pictures with the images, and determines a performance of the motherboard according to the comparison.

Abstract: A test system for a motherboard of a camera includes a storage device, a processor, and a terminal device. The storage device pre-stores image signals. The processor is electronically connected between the storage device and the motherboard, and the terminal device is electronically connected to the motherboard. The terminal device pre-stores a plurality of pictures corresponding to the image signals in the storage device. The processor converts the image signals into test signals. The motherboard restores the test signals into images and transmits the images to the terminal device. The terminal device compares the plurality of pictures with the images, and determines a performance of the motherboard according to the comparison.

Abstract: A protective circuit includes a first jack, a second jack, a first control unit, a detecting circuit, and a logic control circuit. The first jack is connected to a power supply, and includes a grounding wire and a live wire. The second jack is connected to a load, and includes a grounding wire and a live wire. The first control unit includes a first relay, the first relay is connected to the live wire of the first jack and the live wire of the second jack. The detecting circuit detects whether the grounding wire of the first jack is grounded, and outputs indication signals accordingly. The logic control circuit outputs a control signal to the first control unit according to the indication signals to turn on/off the first relay, for allowing the live wire of the first jack to be connected to/disconnected from the live wire of the second jack.

Abstract: A test apparatus for executing a power-on test of an electronic device includes a setting module, an activation module, a controller, and a USB connector. The setting module includes a plurality of input keys. The activation module activates a power supply-on pin of a motherboard of the electronic device. The controller is electronically connected to the input keys and the activation module, the controller drives the activation module to activate the power supply-on pin, and controls a number of times of activation of the power supply-on pin according to a predetermined number of power-on events. The USB connector electronically connects the controller to the electronic device, the USB connector receives power-on and power-off confirmation signals from the electronic device, and transmits the signals to the controller.

Abstract: A power test system is provided for testing an operation voltage of a power supply circuit of a computer. The power test system includes a reference voltage circuit, a comparator circuit, and a display circuit. The reference voltage circuit generates a pair of reference voltages. The pair of reference voltages defines a voltage range therebetween. The comparator circuit receives the pair of reference voltages and the operation voltage, compares the operation voltage with the pair of reference voltages, generates a first signal when the operation voltage is within the voltage range, and generates a second signal when the operation voltage exceeds the voltage range. The display circuit illuminates a first color light in response to the first signal, and illuminates a second color light in response to the second signal.

Abstract: A power supply includes a direct current (DC) voltage converter, a display, a voltage output interface, and a main controller. The DC voltage converter is connected to a voltage terminal of a peripheral interface. The display displays an input interface to allow a voltage value to be inputted therein. The main controller includes a voltage obtaining module and a control module. The voltage obtaining module is used to obtain the inputted voltage value, and output the inputted voltage value. The control module is used to output a pulse width modulation (PWM) signal to the DC voltage converter according to a proportion relationship between the inputted voltage value and the value of a predetermined voltage value. The DC voltage converter is used to convert the first voltage into a second voltage according to the PWM signal, and outputs the second voltage through the voltage output interface.

Abstract: A power supply includes a direct current (DC) voltage converter, a display, a voltage output interface, and a main controller. The DC voltage converter is connected to a voltage terminal of a peripheral interface. The display displays an input interface to allow a voltage value to be inputted therein. The main controller includes a voltage obtaining module and a control module. The voltage obtaining module is used to obtain the inputted voltage value, and output the inputted voltage value. The control module is used to output a pulse width modulation (PWM) signal to the DC voltage converter according to a proportion relationship between the inputted voltage value and the value of a predetermined voltage value. The DC voltage converter is used to convert the first voltage into a second voltage according to the PWM signal, and outputs the second voltage through the voltage output interface.

Abstract: A security system and method includes setting operation steps having a preset sequence, a trigger signal and a testing parameter for each of the operation steps, and a range of each of the testing parameters. The method further confirms a current operation step when a testing device starts a test process. If an output signal received from a sensing device is not identical to the trigger signal of the current operation step, a voice content file of the current operation step is sent to the voice output device. If a value of the output parameter read from the sensing device is not within the range of the testing parameter, a voice prompt file of the testing parameter is sent to the voice output device. After sending the voice content file or the voice prompt file, an abnormality processing command of the current operation step is sent to the testing device to stop the test process.

Abstract: An indicator control apparatus includes a bus connector, a signal converting unit, an address configuring unit, and an indicating unit. The signal converting unit receives bus signals from the bus connector. The address configuring unit sets an address of the signal converting unit. The signal converting unit converts the bus signals to digital input/output (I/O) signals in response to the address of the signal converting unit matching with the bus signals. The indicating unit is driven by the I/O signals and correspondingly displays information.

Abstract: A light intensity measurement apparatus includes a universal serial bus (USB) interface, a number of light sensors, and a micro control unit (MCU). The USB is operable to be connected to a computer. The light sensors are operable to sense light signals and convert the sensed light signals to corresponding electrical signals. The MCU is operable to receive the electrical signals and convert the electrical signals to USB data signals, and then transmit the USB data signals to the computer through the USB interface.

Abstract: A data management device used to manage (that is, exchange data, upgrade programs, and other tasks) a communication device includes a microprocessor unit (MPU), a communication module, a storage module, a display module, and an input/output module. The communication module, the storage module, the display module, and an input/output module are connected to the MPU. The communication module establishes communication between the MPU and the communication device. The storage module stores driver and application programs for the MPU. The display module displays communication states between the MPU and the communication device. Management information can be input into the MPU by the input/output module and transmitted to the communication device by the communication module.

Abstract: An indicator control apparatus includes a bus connector, a signal converting unit, an address configuring unit, and an indicating unit. The signal converting unit receives bus signals from the bus connector. The address configuring unit sets an address of the signal converting unit. The signal converting unit converts the bus signals to digital input/output (I/O) signals in response to the address of the signal converting unit matching with the bus signals. The indicating unit is driven by the I/O signals and correspondingly displays information.

Abstract: A system and method for managing use of a computer determines if a first system time of the computer is in one of the preset available time segments when the computer is powered on, and logs into the operating system of the computer if the first system time is in one of the available time segments. The system and method further determines if a second system time is in one of preset unavailable time segments if a time interval elapses after logging into the operating system, and shuts down the power of the computer if the second system time is in one of the unavailable time segments.

Abstract: The present invention provides a method that may include accessing a first address and an identifier provided by a mobile unit, providing the identifier, receiving a second address associated with the identifier in response to providing the identifier, and authenticating the mobile unit based on the first and second addresses.