Abstract: A testing system includes a computer system and an enhanced small form-factor pluggable (SFP+) transceiver. The computer system send a testing data to the SFP+ transceiver via an SFP+ interface to be tested. The SFP+ transceiver includes a loopback address and receives the testing data and returns the testing data to the computer system via the loopback address. The computer system compares the returned testing data and the testing data it sends to determine whether or not there is data loss occurring.

Abstract: A microcontroller (MCU) and method controls a power indicator. The MCU reads an input voltage of a power supply device, reads an output voltage of the power supply device, and reads a power of the supply device. The MCU determines if the read input voltage of the power supply device falls within a predetermined input voltage range, determines if the read output voltage of the power supply device falls within a predetermined output voltage range, and determines if the read power of the power supply device falls within a predetermined power range. The MCU controls the power indictor to indicate a light according to a determination result of the power supply device.

Abstract: A double display device includes a first display and a second display. The first and the second displays cooperatively show an interface. The double display device further includes a double display module, a detection module, a determination module, a single display module. The double display module activates the first and the second displays to show the interface. The detection module detects the level of the electrical charge of the double display device. The determination module determines whether the level of electrical charge of the double display device is less than or equal to a predetermined value. The single display module turns off one of the first and the second displays, and displays the interface on the other of the first and the second displays, when the level of the electrical charges of the double display device is less than or equal to the predetermined value.

Abstract: An exemplary Peripheral Component Interconnect Express (PCIE) interface card is electrically coupled to a CPU. The PCIE interface card includes a circuit board, a first PCIE interface module arranged on the circuit board, at least one second PCIE interface module arranged on the circuit board, and a PCIE switch arranged on the circuit board. The PCIE switch is electrically coupled to the first PCIE interface module and the at least one second PCIE interface module. The PCIE switch transmits data from the CPU to the first PCIE interface module, and exchanges data between the CPU and the at least one second PCIE interface module.

Abstract: An electric soldering iron includes a proximity sensor and a processing unit. The processing unit electronically connects to the proximity sensor, a timer, and a power control unit. The power control unit connects to a heating circuit. The proximity sensor senses presence of a nearby user. The processing unit controls the timer to count a time duration when the proximity sensor does not sense the presence of the nearby user. If the non-sensing continues for a certain period the electric soldering iron is switched to less power, and if the non-sensing continues for an additional period of time, the electric soldering iron is switched off altogether.

Abstract: A peripheral component interconnect express (PCIe) expansion system used to set a motherboard PCIe slot arranged on a motherboard to work in a transmission mode with different transmission lanes includes a basic input/output system (BIOS) set on the motherboard and an expansion card. The expansion card includes a circuit board, three expansion PCIe slots arranged on the circuit board, a converting chip used to detect whether there is a device plugged into any one of the expansion PCIe slots, and an edge connector set on a side of the circuit board to be engaged in the motherboard PCIe slot. The BIOS chip used to set the transmission mode of the motherboard PCIe slot according to a detection result obtained by the converting chip.

Abstract: An exemplary test card includes a display unit for displaying a real time status of a number of electric power supply modules of a motherboard, and a programmable logic chip. The display unit includes at least one seven segment LED display. The programmable logic chip gains an effective data of the real time status, and drives the display unit to display the real time status based on the effective data. The real time status can indicate a normal working status, or an abnormal working status if one or more of the power supply modules is not working normally.

Abstract: A hard disk backplane for supporting a number of hard disks includes a display unit for displaying the present status of the hard disks, and a programmable logic chip. The display unit includes at least one seven segment LED display. The status displayed includes an indication of a normal working or an indication otherwise for abnormal working. The programmable logic chip is configured for obtaining signals as to the present status of the plurality of hard disks, and driving the at least one seven segment LED display to display the status based on the signals.

Abstract: A computer includes a central processing unit (CPU), a power supply, a control unit, a switch unit connected to the CPU and the control unit, a north bridge chip connected between the switch unit and the power supply. The CPU includes a temperature detection unit to detect temperature of the CPU. When the temperature of the CPU is greater than a predetermined value, the CPU outputs a first low level signal to the switch unit. When the button is pressed, the control unit outputs a second low level signal to the switch unit. When the switch unit receives at least one of the first and second low level signals, the switch unit outputs a control signal to the north bridge chip to disable the power supply, thereby turning off the computer.