Power-saving reminder circuit for computer

摘要

An anode of a light emitting diode (LED) and a second terminal of a third electrical switch are connected to a first power source. First terminals of the first and second electrical switches are respectively connected to a second power source and a suspend signal pin. A second terminal of the first electrical switch is connected to a cathode of the LED and an output pin of a counter chip. A second terminal of a second electrical switch is connected to the first power source through a first resistor and a first terminal of the third electrical switch. A third terminal of the third electrical switch is grounded through second and third resistors and a capacitor in sequence and a voltage pin of the counter chip.