Abstract: A keyboard includes a keyboard processor configured for outputting a control signal for turning a computer on/off; a switch circuit connected to a turn-on port of a south bridge chipset on a mainboard of the computer; and a processor connected to the keyboard processor and the switch circuit. When the processor receives the control signal output from the keyboard processor, the processor outputs a high pulse signal to the switch circuit to make the turn-on port grounded to turn on or turn off the computer.

Abstract: An eye protection apparatus includes a sensor adapted for sensing the presence of a person within a predetermined distance range in front of a monitor and outputting a pulse signal, an amplifier unit connected to the sensor for receiving the pulse signal and outputting an amplified signal, a comparator connected to the amplifier unit to receive the amplified signal, a MPU connected to the comparator, and an alarm circuit connected to the MPU. The comparator compares the amplified signal with a predetermined signal, and sends a result to the MPU; the MPU outputs a control signal according to the result to the alarm circuit, and the alarm circuit controls power to the monitor.

Abstract: A keyboard includes a keyboard processor configured for outputting a control signal for turning a computer on/off; a switch circuit connected to a turn-on port of a south bridge chipset on a mainboard of the computer; and a processor connected to the keyboard processor and the switch circuit. When the processor receives the control signal output from the keyboard processor, the processor outputs a high pulse signal to the switch circuit to make the turn-on port grounded to turn on or turn off the computer.

Abstract: An eye protection apparatus includes a sensor adapted for sensing the presence of a person within a predetermined distance range in front of a monitor and outputting a pulse signal, an amplifier unit connected to the sensor for receiving the pulse signal and outputting an amplified signal, a comparator connected to the amplifier unit to receive the amplified signal, a MPU connected to the comparator, and an alarm circuit connected to the MPU. The comparator compares the amplified signal with a predetermined signal, and sends a result to the MPU; the MPU outputs a control signal according to the result to the alarm circuit, and the alarm circuit controls power to the monitor.