CN106712761B

CN106712761B - Electronic equipment switching method

Info

Publication number: CN106712761B
Application number: CN201611134926.5A
Authority: CN
Inventors: 赵伟
Original assignee: Guangdong Hisense Broadband Technology Co ltd
Current assignee: Guangdong Hisense Broadband Technology Co ltd
Priority date: 2016-12-11
Filing date: 2016-12-11
Publication date: 2023-04-28
Anticipated expiration: 2036-12-11
Also published as: CN106712761A

Abstract

The invention discloses an electronic equipment switching method, which comprises a Schmidt trigger, a button and a resistance-capacitance device which are connected with the input end of the Schmidt trigger, and a D trigger which is connected with the output end of the Schmidt trigger, wherein the clock end of the D trigger is connected with the output end of the Schmidt trigger, the negative output end of the D trigger is connected with the data input end of the D trigger, the resistance-capacitance device comprises a resistor R1, a resistor R2 and a capacitor C1, and the positive output end or the negative output end of the D trigger can be used as control signal electronic equipment of a power supply. The switching method adopts a pure hardware circuit to complete the function of a single-contact switching power supply, and can be realized by using a simple basic device, so that the switching method has the advantages of simple circuit structure, low cost, power consumption saving, low cost, reliability, stability, safety and high quality.

Description

Electronic equipment switching method

Technical Field

The invention relates to the field of the structure of electronic equipment, in particular to a switching method of a single-contact switch.

Background

Currently, electronic devices, particularly handheld electronic devices, often require a single contact switch to turn on/off the power supply. The general requirements are: and the machine is started up for a long time by a few seconds, and when the machine needs to be shut down, the machine is started up for a long time by a few seconds. The common method is to wait for the button to be pressed by a singlechip and time the pressed time, and after the time length is up, the singlechip outputs actions to switch on or off the power supply of the large system. The singlechip subsystem is always electrified to stand by.

This method has the disadvantage: 1. a single-chip microcomputer is needed, but some equipment systems are simple, and the addition of the single-chip microcomputer increases complexity, so that the application of the method is limited. 2. The single chip microcomputer is a small microcomputer system, and under the influence of external interference and other factors, the phenomenon of unstable work such as program running and flying exists.

Disclosure of Invention

The invention aims to overcome the defects of the prior art, and provides an electronic equipment switching method which adopts a pure hardware circuit to complete the function of a single-contact switching power supply and can be realized by using simple basic devices, so that the circuit structure is simple, the cost is lower, the power consumption can be saved, and the switching method is lower in cost, reliable, stable, safe and high in quality.

The technical scheme adopted for solving the technical problems is as follows: the electronic equipment switching method comprises a Schmitt trigger, a button and a resistance-capacitance device which are connected with the input end of the Schmitt trigger, and a D trigger which is connected with the output end of the Schmitt trigger, wherein the clock end of the D trigger is connected with the output end of the Schmitt trigger, the negative output end of the D trigger is connected with the data input end of the D trigger, the resistance-capacitance device comprises a resistor R1, a resistor R2 and a capacitor C1, and the positive output end or the negative output end of the D trigger can be used as a control signal of a power supply; the switching method comprises the following steps:

(1) Pressing a button, and charging a capacitor C1 through a resistor R1 by a power supply to enable the voltage output by the capacitor C1 to be higher than the forward threshold voltage of the Schmitt trigger, so that the output of the Schmitt trigger is changed from low to high; as the clock of the D trigger, the input state of the data end of the D trigger is driven to be transmitted to the output end, and as the data input end of the D trigger is connected with the negative output end, the positive output end and the negative output end of the D trigger are reversed, so that the circuit power supply is switched from off to on or from on to off;

(2) The button is loosened, the power supply is not connected with the resistor container, the capacitor C1 discharges through the resistors R1 and R2, the voltage of the connection line of the capacitor C1 and the Schmitt trigger can be gradually reduced below the negative threshold value of the Schmitt trigger, and the output of the Schmitt trigger is enabled to be low. How long the button is pressed causes the D flip-flop output to invert, depending on the parameters of R1 and C1 and the value of the supply voltage.

Further, in the step (1), the power supply voltage is 3.3 v, the forward threshold voltage of the D trigger is 1.65 v, the power supply is turned on after the button is pressed for 3 seconds, the capacitor C1 is 10 microfarads, the resistor R1 is 435K, and the resistor R2 is 10K.

In summary, the electronic equipment switching method of the invention adopts a pure hardware circuit to complete the function of a single-contact switching power supply, and can be realized by using simple basic devices, so that the circuit structure is simple, the cost is low, the power consumption can be saved, and the switching method is low in cost, reliable, stable, safe and high in quality.

Drawings

FIG. 1 is a connection block diagram of an electronic device switch;

fig. 2 is a circuit connection diagram of an electronic device switch.

Detailed Description

Example 1

In the switching method of the electronic device described in this embodiment 1, as shown in fig. 1 and 2, the switching method includes a schmitt trigger 3, a button 1 connected to an input end of the schmitt trigger, a resistor container 2, and a D-trigger 4 connected to an output end of the schmitt trigger, a clock end of the D-trigger is connected to an output end of the schmitt trigger, a negative output end of the D-trigger is connected to a data input end of the D-trigger, and the resistor container includes a resistor R1, a resistor R2, and a capacitor C1, where either a positive output end or a negative output end of the D-trigger can be used as a control signal of a power supply; the switching method comprises the following steps:

In the step (1), the power supply voltage is 3.3 volts, the forward threshold voltage of the D trigger is 1.65 volts, the power supply is turned on after the button is pressed for 3 seconds, the capacitor C1 is 10 microfarads, the resistor R1 value is 435K, and the resistor R2 value is 10K.

The above description is only of the preferred embodiment of the present invention, and is not intended to limit the structure of the present invention in any way. Any simple modification, equivalent variation and modification of the above embodiments according to the technical substance of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. The electronic equipment switching method is characterized by comprising a Schmidt trigger, a button, a resistance-capacitance device and a D trigger, wherein the button and the resistance-capacitance device are connected to the input end of the Schmidt trigger, the D trigger is connected to the output end of the Schmidt trigger, the clock end of the D trigger is connected with the output end of the Schmidt trigger, the negative output end of the D trigger is connected with the data input end of the D trigger, the resistance-capacitance device comprises a resistor R1, a resistor R2 and a capacitor C1, and the positive output end or the negative output end of the D trigger can be used as a control signal of a power supply; the switching method comprises the following steps:

(2) The button is loosened, the power supply is not connected with the resistor container, the capacitor C1 discharges through the resistors R1 and R2, the voltage of the connection line of the capacitor C1 and the Schmitt trigger can be gradually reduced below the negative threshold value of the Schmitt trigger, and the output of the Schmitt trigger is enabled to be low.

2. The method of claim 1, wherein in the step (1), the power supply voltage is 3.3 v, the forward threshold voltage of the D flip-flop is 1.65 v, the power is turned on after the button is pressed for 3 seconds, the capacitor C1 is 10 microfarads, the resistor R1 is 435K, and the resistor R2 is 10K.