CN102749984B - Computer power-off reminding circuit for saving energy - Google Patents

一种电脑关机节能提醒电路，包括一连接器、一发光二极管、一与非门、一电压输出端及一旋转按键开关，所述旋转按键开关包括第一及第二开关，所述连接器的开机引脚连接所述第一开关的第一端，所述第一开关的第二端接地，所述连接器的电压引脚连接所述第二开关的第一端，所述第二开关的第二端连接所述电压输出端、所述与非门的电压端及所述与非门的第一输入端，所述连接器的信号引脚连接所述与非门的第二输入端，所述与非门的输出端连接所述发光二极管的阳极，所述发光二极管的阴极接地。所述节能提醒电路通过所述发光二极管的发光来提醒电脑用户通过旋转按键开关关断5V备用电压来节能。

A computer shutdown energy-saving reminder circuit, comprising a connector, a light-emitting diode, a NAND gate, a voltage output terminal and a rotary key switch, the rotary key switch includes a first switch and a second switch, the connector The power-on pin is connected to the first end of the first switch, the second end of the first switch is grounded, the voltage pin of the connector is connected to the first end of the second switch, and the second end of the second switch is connected to the ground. The second terminal is connected to the voltage output terminal, the voltage terminal of the NAND gate and the first input terminal of the NAND gate, and the signal pin of the connector is connected to the second input terminal of the NAND gate, The output end of the NAND gate is connected to the anode of the LED, and the cathode of the LED is grounded. The energy-saving reminder circuit reminds the computer user to save energy by turning off the 5V standby voltage by rotating the key switch through the light emitting diode.

电脑关机节能提醒电路Computer shutdown energy saving reminder circuit

技术领域 technical field

本发明涉及一种提醒电路，特别涉及一种电脑关机节能提醒电路。 The invention relates to a reminder circuit, in particular to a computer shutdown energy-saving reminder circuit.

背景技术 Background technique

根据高级配置与电源接口（Advanced Configuration and Power Interface, ACPI）规范，电脑电源管理系统可将电脑的工作状态分为S0到S5，它们代表的含义分别是： According to the Advanced Configuration and Power Interface (ACPI) specification, the computer power management system can divide the working state of the computer into S0 to S5, and the meanings they represent are:

S0：电脑正常工作，所有硬件设计全部处于打开或正常工作的状态； S0: The computer works normally, and all hardware designs are turned on or working normally;

S1：也称为POS（Power on Suspend，CPU停止工作），其他的硬件设备仍然正常工作； S1: also known as POS (Power on Suspend, the CPU stops working), other hardware devices still work normally;

S2：将CPU关闭，但其余的硬件设备仍然运转； S2: Turn off the CPU, but the rest of the hardware devices are still running;

S3：通常称为STR（Suspend to RAM，挂起到内存），将运行中的数据写入内存后关闭硬盘； S3: usually called STR (Suspend to RAM, suspend to memory), write the running data into the memory and turn off the hard disk;

S4：也称为STD（Suspend to Disk，挂起到硬盘），内存信息写入硬盘，然后所有部件停止工作； S4: also known as STD (Suspend to Disk, suspend to hard disk), the memory information is written to the hard disk, and then all components stop working;

S5：所有硬件设备（包括电源）全部都关闭，即电脑处于关机状态。 S5: All hardware devices (including power supply) are turned off, that is, the computer is turned off.

用户可通过电脑的电源管理菜单查看电脑的工作模式，当电脑处于S0状态时，电源处于开启状态；在电脑关机后，电源开始转入S5状态，此时主机板还接有+5VSB的备用电压信号，以作为主机板电源监控电路的工作电源，支持电脑唤醒等功能，因而关机后主机板还在持续消耗电能，造成不必要的浪费。 The user can check the working mode of the computer through the power management menu of the computer. When the computer is in the S0 state, the power supply is on; after the computer is turned off, the power supply starts to transfer to the S5 state. At this time, the motherboard is still connected to the backup voltage of +5VSB The signal is used as the working power of the motherboard power monitoring circuit to support functions such as computer wake-up, so the motherboard continues to consume power after shutdown, causing unnecessary waste.

发明内容 Contents of the invention

有鉴于此，有必要提供一种电脑关机节能提醒电路，以在电脑关机后关断备用电压来节省电能。 In view of this, it is necessary to provide a computer shutdown energy saving reminder circuit to turn off the backup voltage after the computer shutdown to save power.

一种电脑关机节能提醒电路，包括一连接器、一发光二极管、一与非门、一电压输出端及一旋转按键开关，所述旋转按键开关包括第一及第二开关，所述连接器的开机引脚连接所述第一开关的第一端，所述第一开关的第二端接地，所述连接器的电压引脚连接所述第二开关的第一端，所述第二开关的第二端连接所述电压输出端、所述与非门的电压端及所述与非门的第一输入端，所述连接器的信号引脚连接所述与非门的第二输入端，所述与非门的输出端连接所述发光二极管的阳极，所述发光二极管的阴极接地，当所述第一及第二开关均闭合时，所述与非门的第一及第二端均接收到高电平信号，所述与非门的输出端输出一低电平信号，所述发光二极管不亮，所述电压输出端输出一备用电压，当所述第一开关断开而所述第二开关闭合时，所述与非门的第一输入端接收一高电平信号而所述与非门的第二输入端接收到一低电平信号，所述与非门的输出端输出一高电平信号，所述发光二极管发光，所述电压输出端不输出所述备用电压。 A computer shutdown energy-saving reminder circuit, including a connector, a light-emitting diode, a NAND gate, a voltage output terminal and a rotary key switch, the rotary key switch includes a first switch and a second switch, the connector The power-on pin is connected to the first end of the first switch, the second end of the first switch is grounded, the voltage pin of the connector is connected to the first end of the second switch, and the second end of the second switch is connected to the ground. The second terminal is connected to the voltage output terminal, the voltage terminal of the NAND gate and the first input terminal of the NAND gate, and the signal pin of the connector is connected to the second input terminal of the NAND gate, The output end of the NAND gate is connected to the anode of the light-emitting diode, and the cathode of the light-emitting diode is grounded. When the first and second switches are closed, the first and second ends of the NAND gate are connected to the ground. After receiving a high-level signal, the output terminal of the NAND gate outputs a low-level signal, the LED is off, and the voltage output terminal outputs a standby voltage. When the first switch is turned off and the When the second switch is closed, the first input terminal of the NAND gate receives a high level signal and the second input terminal of the NAND gate receives a low level signal, and the output terminal of the NAND gate outputs A high level signal, the light emitting diode emits light, and the voltage output terminal does not output the backup voltage.

相较现有技术，所述电脑关机节能提醒电路可在电脑关机后通过所述发光二极管的发光来提醒电脑用户通过所述旋转按键开关关断所述电脑主机板上的5V备用电压，以此达到节能目的。 Compared with the prior art, the computer power-off energy-saving reminder circuit can remind the computer user to turn off the 5V standby voltage on the computer motherboard through the rotary key switch through the light emitting diode after the computer is turned off, thereby To achieve the purpose of energy saving.

附图说明 Description of drawings

图1是本发明电脑关机节能提醒电路的较佳实施方式的电路图。 FIG. 1 is a circuit diagram of a preferred embodiment of a computer power-off energy-saving reminder circuit of the present invention.

主要元件符号说明 Description of main component symbols

电脑关机节能提醒电路Computer shutdown energy saving reminder circuit 100100 连接器Connector 1010 电容capacitance C1、C2C1, C2 电阻resistance R1-R4R1-R4 与非门NAND gate U1U1 发光二极管led D1D1 旋转按键开关Rotary key switch 2020 开关switch S1、S2S1, S2 电压输出端voltage output VoutVout 电压源power source VCCVCC

如下具体实施方式将结合上述附图进一步说明本发明。 The following specific embodiments will further illustrate the present invention in conjunction with the above-mentioned drawings.

具体实施方式 detailed description

如图1所示，本发明电脑关机节能提醒电路100设置在一电脑主机板上，其较佳实施方式包括一连接器10、电容C1及C2、电阻R1-R4、一发光二极管（light emitting diode, LED）D1、一与非门U1、一电压输出端Vout及一旋转按键开关20。在本实施方式中，所述旋转按键开关20及所述LED D1设置在所述电脑前面板上，通过所述旋转按键开关20启动所述电脑。所述旋转按键开关20是习知技术在此不详细叙述，其功能是可按下弹起也可旋转，当按下此按键开关后，会闭合或断开一开关，如本实施方式中的开关S1，当旋转到某一指定位置（如启动位置或关闭位置），则会闭合或断开另一开关，如本实施方式中的开关S2。 As shown in Figure 1, the computer shutdown energy-saving reminder circuit 100 of the present invention is arranged on a computer motherboard, and its preferred embodiment includes a connector 10, capacitors C1 and C2, resistors R1-R4, a light emitting diode (light emitting diode) , LED) D1 , a NAND gate U1 , a voltage output terminal Vout and a rotary key switch 20 . In this embodiment, the rotary key switch 20 and the LED D1 are arranged on the front panel of the computer, and the computer is activated through the rotary key switch 20 . The rotary key switch 20 is a known technology and will not be described in detail here. Its function is that it can be pressed and popped up or rotated. When the key switch is pressed, a switch will be closed or disconnected, as in this embodiment. When the switch S1 is rotated to a specified position (such as the start position or the close position), another switch will be turned on or off, such as the switch S2 in this embodiment.

所述连接器10的开机引脚PS_ON连接所述开关S1的一端，所述开关S1的另一端接地，所述电容C1串接在所述连接器10的开机引脚PS_ON与地之间。所述连接器10的电压引脚P5V_STBY连接所述开关S2的一端，所述开关S2的另一端连接所述电压输出端Vout、所述与非门U1的电压端及经所述电阻R3连接所述与非门U1的第一输入端。所述连接器10的信号引脚PWRGD_PS连接所述与非门U1的第二输入端，所述电容C2串接在所述连接器10的信号引脚PWRGD_PS与地之间，所述电阻R1串接在所述连接器10的信号引脚PWRGD_PS与一电压源VCC之间，所述电阻R2串接在所述连接器10的信号引脚PWRGD_PS与地之间。所述与非门U1的输出端连接所述LED D1的阳极，所述LED D1的阴极经所述电阻R4接地，所述与非门U1的接地端接地。 The power-on pin PS_ON of the connector 10 is connected to one end of the switch S1 , the other end of the switch S1 is grounded, and the capacitor C1 is connected in series between the power-on pin PS_ON of the connector 10 and ground. The voltage pin P5V_STBY of the connector 10 is connected to one end of the switch S2, and the other end of the switch S2 is connected to the voltage output terminal Vout, the voltage terminal of the NAND gate U1 and the resistor R3 to the The first input terminal of the NAND gate U1. The signal pin PWRGD_PS of the connector 10 is connected to the second input terminal of the NAND gate U1, the capacitor C2 is connected in series between the signal pin PWRGD_PS of the connector 10 and the ground, and the resistor R1 is connected in series Connected between the signal pin PWRGD_PS of the connector 10 and a voltage source VCC, the resistor R2 is connected in series between the signal pin PWRGD_PS of the connector 10 and ground. The output terminal of the NAND gate U1 is connected to the anode of the LED D1, the cathode of the LED D1 is grounded through the resistor R4, and the ground terminal of the NAND gate U1 is grounded.

使用时，所述连接器10连接所述电脑的电源供应器，当所述旋转按键开关20旋转到启动位置（即闭合开关S2）并按下此按键开关20（即闭合开关S1）时，所述电源供应器通过所述连接器10的引脚PS_ON接收到一低电平的开机信号，所述电脑开机，此时电源供应器通过所述连接器10的引脚PWRGD_PS输出一高电平的power good信号及通过所述连接器10的引脚P5V_STBY输出一5V备用电压，所述5V备用电压及所述高电平的power good信号分别提供给所述与非门U1的第一及第二输入端，所述与非门U1的输出端输出一低电平信号，所述LED D1不发光，以指示所述电脑处于正常工作状态，所述电压输出端Vout输出5V备用电压。 When in use, the connector 10 is connected to the power supply of the computer. When the rotary key switch 20 is rotated to the starting position (that is, the switch S2 is closed) and the key switch 20 is pressed (that is, the switch S1 is closed), the The power supply receives a low-level power-on signal through the pin PS_ON of the connector 10, and the computer is turned on. At this time, the power supply outputs a high-level signal through the pin PWRGD_PS of the connector 10. The power good signal and a 5V standby voltage are output through the pin P5V_STBY of the connector 10, and the 5V standby voltage and the high-level power good signal are provided to the first and second NAND gates U1 respectively. The input terminal, the output terminal of the NAND gate U1 outputs a low-level signal, the LED D1 does not emit light to indicate that the computer is in a normal working state, and the voltage output terminal Vout outputs a 5V standby voltage.

当再次按下此按键开关20时，即断开开关S1而开关S2仍然闭合，所述电源供应器通过所述连接器10的引脚PS_ON没有接收到开机信号而关闭，所述电脑关机，所述与非门U1的第二输入引脚接收到一低电平的power good信号，因为此时所述电源供应器仍然有5V备用电压输出，因此所述与非门U1的第一输入端接收到5V备用电压，所述与非门U1的输出端输出一高电平信号，所述LED D1导通而发光，以指示所述电脑处于关机状态并提醒使用者将所述旋转按键开关20旋转到关闭状态（即断开开关S2），从而使所述5V备用电压不会通过所述电压输出端Vout输出给所述电脑主机板上的电子元件，以此来关闭5V备用电压来实现节能目的。 When the key switch 20 is pressed again, the switch S1 is turned off while the switch S2 is still closed, the power supply is turned off without receiving the power-on signal through the pin PS_ON of the connector 10, and the computer is turned off, so The second input pin of the NAND gate U1 receives a low-level power good signal, because the power supply still has a 5V standby voltage output at this time, so the first input terminal of the NAND gate U1 receives to 5V standby voltage, the output terminal of the NAND gate U1 outputs a high-level signal, and the LED D1 is turned on and emits light to indicate that the computer is in a shutdown state and remind the user to rotate the rotary key switch 20 to the closed state (that is, switch S2 off), so that the 5V standby voltage will not be output to the electronic components on the computer motherboard through the voltage output terminal Vout, so as to turn off the 5V standby voltage to achieve the purpose of energy saving .

所述电脑关机节能提醒电路100可在电脑关机后通过所述发光二极管D1的发光来提醒电脑用户通过所述旋转按键开关20关断所述电脑主机板上的5V备用电压，以此达到节能目的。 The computer power-off energy-saving reminder circuit 100 can remind the computer user to turn off the 5V standby voltage on the computer motherboard through the rotary key switch 20 through the light emitting diode D1 after the computer is turned off, so as to achieve the purpose of energy saving .