摘要:
An exemplary motherboard includes a first slot arranged for mounting a first type of memory, a second slot arranged for mounting a second type of memory, and a voltage regulator electronically connected to the first slot and the second slot. The first memory and the second memory are alternatively mounted on the motherboard, the voltage regulator detects which type memory is currently mounted on the motherboard and outputs voltages suitable for the type of the memory mounted on the motherboard accordingly.
摘要:
A circuit includes first to fifth resistors and first to third electronic switches. The circuit allows a signal from a first terminal of the second electronic switch to change from a low level to a high level gradually, and to change from a high level to a low level abruptly.
摘要:
A distinguishing circuit includes first to fifth resistors, a front panel connector, and a jumper. The front panel connector includes first to tenth pins. When the ninth pin is connected to the tenth pin through the jumper, a BIOS (Basic Input Output System) chip will determine whether a computer system is a first type. When the eighth pin is connected to the tenth pin through the jumper, the BIOS chip will determine whether the computer system is a second type.
摘要:
A charging circuit employed in an electronic apparatus is operable to charge a portable electronic device. The charging circuit includes a charging control microchip including two control terminals, a southbridge microchip, a logic control circuit, and a basic input/output system (BIOS). The southbridge microchip and the BIOS are both electronically connected to the logic control circuit to control the logic control circuit to set or reset voltage of the two control terminals, then the charging control microchip is switched to a charging mode or a data transmission mode according to the voltage of the two control terminals.
摘要:
An electronic apparatus includes a microphone, a processor, a motherboard, and a voice recognition microchip. The voice recognition microchip compares a voice command with a pre-stored voice command. If the voice command is identical with the pre-stored voice command, the processor outputs a control signal to the motherboard. The motherboard controls the electronic apparatus to perform an action corresponding to the control signal.
摘要:
An indication circuit is used on a motherboard. First and second pins on the motherboard output different signals corresponding to different power-on self-test errors. The indication circuit includes first to third electronic switches, first and second light-emitting diodes, and first to fifth resistors. When different errors occurred during power-on self-test, different signals are output from the first and second pins on the motherboard, such that to make the first and second light-emitting diodes activated or deactivated. As a result, the indication circuit can indicate different errors when the motherboard is performing power-on self-test.
摘要:
An exemplary indicator light control device includes a motherboard, an indicator control board, and a status indicator unit. The motherboard, the indicator control board, and the status indicator unit are connected in series. The motherboard outputs a first control signal and a second control signal according to an operational status of an electronic device. The indicator control board determines the operational status of the electronic device according to the first and second control signals, and controls operation of the status indicator unit according to the determined operational status of the electronic device.
摘要:
A circuit for removing passwords from a computer includes a jumper and a power circuit. The jumper includes a base and a jumper block. The base includes first to fourth pins. The first pin is idle. The third pin is grounded. The second pin is coupled to a basis input output system (BIOS) chip of the computer, the fourth pin is coupled to a complementary metal-oxide-semiconductor (CMOS) chip of the computer. The power circuit is coupled to the second and the fourth pins, to supply power for the BIOS chip and the CMOS chip. The jumper block is plugged between the second and the third pins to remove the password in the BIOS chip, and plugged between the third and the fourth pins to remove the password in the CMOS chip.
摘要:
An LED control system includes a platform controller unit, a peripheral interface control chip connecting with the platform controller unit, and an LED unit connecting with the peripheral interface control chip. The platform controller unit outputs control instructions to the peripheral interface control chip. The control instructions outputted by the platform controller unit is transformed via programming the peripheral interface control chip, so that the on/off state of the LED unit as well as brightness and color of light emitted from the LED unit can be controlled by pulse signals output from the output ports of the peripheral interface control chip.
摘要:
A power supply circuit includes a basic input output system (BIOS), a super input output (SIO), a bivibrator, a logical selector, and a voltage converter. The basic input output system (BIOS) is configured for storing different operation modes of a computer. The super input output (SIO) is configured for generating standby mode signals according to the different operation modes. The bivibrator is configured for generating a reference signal when upon receiving a clock signal from the computer when the computer is turned on. The logical selector is configured for generating a standby control signal in response to the reference signal and one of the standby mode signals. The voltage converter is configured for transforming the first standby voltage into a second standby voltage to drive the SIO. The SIO receives the second standby voltage before the clock signal is delayed and provided to the SIO to start the computer.