Patent ID: 8362913
Filing Date: 2013-01-29
Classification: G06F

Abstract:
1. A power-saving reminder circuit for a computer with a motherboard, the power-saving reminder circuit comprising: a first light emitting diode (LED) comprising a cathode, and an anode connected to a first power source of the motherboard; a second light emitting diode (LED) comprising a cathode, and an anode connected to the first power source; a counter chip comprising an output pin, a voltage pin, a reset pin, a trigger pin, a gate pin, and a discharge pin; a first electronic switch comprising first to third terminals, wherein the first terminal is connected to a second power source of the motherboard, the third terminal is grounded, the second terminal is connected to the cathode of the first LED and also connected to the output pin of the counter chip; a second electronic switch comprising first to third terminals, wherein the first terminal of the second electronic switch is connected to a first suspend signal pin of the motherboard, the third terminal of the second electronic switch is grounded, the second terminal of the second electronic switch is connected to the first power source of the motherboard through a first resistor; a third electronic switch comprising first to third terminals, wherein the first terminal of the third electronic switch is connected to the second terminal of the second electronic switch, the second terminal of the third electronic switch is connected to the cathode of the second LED, the third terminal of the third electronic switch is grounded; a fourth electronic switch comprising first to third terminals, wherein the first terminal of the fourth electronic switch is connected to a second suspend signal pin of the motherboard, the third terminal of the fourth electronic switch is grounded, the second terminal of the fourth electronic switch is connected to the first power source of the motherboard through a second resistor; and a fifth electronic switch comprising first to third terminals, wherein the first terminal of the fifth electronic switch is connected to the second terminal of the fourth electronic switch, the second terminal of the fifth electronic switch is connected to the first power source of the motherboard, the third terminal of the fifth electronic switch is grounded through a third resistor, a fourth resistor, and a first capacitor connected in series, and also connected to the voltage pin of the counter chip, the reset pin of the counter chip is connected to the voltage pin of the counter chip, the trigger pin and the gate pin of the counter chip are connected to a node between the fourth resistor and the first capacitor, the discharge pin of the counter chip is connected to a node between the third and the fourth resistors; wherein when the motherboard is powered on, the first electronic switch, the second electronic switch, and the fourth electronic switch are turned on, the third and the fifth electronic switches are turned off, the first LED is lit, the second LED is not lit, the counter chip does not operate; wherein when the motherboard is in a suspended state, the first electronic switch, the second electronic switch, and the fifth electronic switch are turned off, the third and the fourth electronic switches are turned on, the first LED is not lit, the second LED is lit, the counter chip does not operate; and wherein when the motherboard is powered off, the second and the fifth electronic switches are turned on, the first electronic switch, the third electronic switch, and the fourth electronic switch are turned off, the first and the second LEDs are not lit, the first capacitor charges and discharges to make the counter chip control the first LED to blink.