CN102361448A

CN102361448A - Touch time switch prepared by using time-base circuit NE555

Info

Publication number: CN102361448A
Application number: CN201110241936XA
Authority: CN
Inventors: 何林
Original assignee: Individual
Current assignee: Individual
Priority date: 2011-08-23
Filing date: 2011-08-23
Publication date: 2012-02-22

Abstract

The invention relates to a touch time switch prepared by using a time-base circuit NE555. The touch time switch is composed of a power supply DC, a touch electrode M, a monostable circuit and a relay control circuit. The monostable circuit is composed of a touch electrode M, a coupling capacitance C1, a time-base circuit IC1, a potentiometer RP, an electrolytic capacitor C2 and a capacitor C3. The relay control circuit is composed of a relay J and a silicon switch diode D1. Some devices such as an electronic instrument, an illuminating lamps or household electrical appliance and the like sometimes needs a segment of time delay to power on or power off, and power saving and electricity safety of large power electrical appliance are concerned. The invention is aimed at solving the above problems. By using the touch time switch in the invention, reducing unnecessary electric power waste is facilitated, a demand peak of a commercial power line is effectively avoided, a load of the commercial power line is reduced, and power utilization security is ensured.

Description

Touch timing switch with time-base circuit NE555 making

Technical field

The invention belongs to the electron controls technology field, relate to a kind of touch timing switch made from time-base circuit NE555.

Background technology

Power consumption equipments such as some electronic instrument, lighting or household electrical appliance, energising start or outage shutdown after a period of time of need delaying time sometimes; Or family, unit electricity consumption line load are too heavy, and the use of can not switching on simultaneously of two high-power electric appliances needs artificial will be both high-power electric appliance and power up respectively in chronological order, thereby alleviate the live load and the Electrical Safety of circuit.

In order effectively to resolve the problem of above-mentioned several respects, be principle not change original large power-consuming equipment and supply line, the present invention can satisfy the different electricity consumption needs of various electrical equipment, reaches the purpose of economize on electricity and safety utilization of electric power.

Below specify this correlation technique made from the touch timing switch made from time-base circuit NE555.

Summary of the invention

Goal of the invention and beneficial effect: the present invention starts shooting or the outage shutdown in order to solve equipment such as some electronic instrument, lighting or household electrical appliance, to switch on after a period of time of need delaying time sometimes, or the solution high-power electric appliance economizes on electricity and safety utilization of electric power is a purpose.Using it one is to help to reduce unnecessary power wastage; The 2nd, can effectively evade the line peak of power consumption, reduce the line load, ensure Electrical Safety.

Technical characterictic: with the touch timing switch that time-base circuit NE555 makes, be made up of power supply DC, touch electrode M, monostable circuit and control relay circuit, its characteristic comprises:

Monostable circuit: form by touch electrode M, coupling capacitance C1, time-base circuit IC1, potentiometer RP, electrochemical capacitor C2 and capacitor C 3; Touch electrode M connects the end of coupling capacitance C1; 2 pin of another termination time-base circuit IC1 of

capacitor C

1,6 pin of time-base circuit IC1 and 7 pin connect the end of potentiometer RP and the positive pole of electrochemical capacitor C2, the anodal VCC of the other end of potentiometer RP and lever arm connection circuit thereof; The negative pole connection circuit ground GND of electrochemical capacitor C2; The anodal VCC of 4 pin of time-base circuit IC1 and 8 pin connection circuits, 5 pin of time-base circuit IC1 connect an end of

capacitor C

3, and 1 pin of the timely basic IC circuit 1 of the other end of capacitor C 3 links to each other with circuit ground GND;

Control relay circuit: be made up of relay J and transwitch diode D1,3 pin of time-base circuit IC1 are succeeded an end and the transwitch diode D1 negative pole of electrical equipment J coil, the anodal connection circuit ground GND of the other end of relay J coil and transwitch diode D1.

Other partial circuits are formed and the mutual annexation of components and parts

The positive pole of power supply DC links to each other with circuit anode VCC, and the negative pole of power supply DC links to each other with circuit ground GND.

The circuit working principle: with the time-delay electric light is example, and IC1 is a slice 555 time-base circuits in the circuit of the present invention, and core circuit is connected into monostable circuit.Owing to the non-inductive voltage of touch electrode M, electrochemical capacitor C2 is through the 7 pin discharge offs of time-base circuit IC1 at ordinary times, and 3 pin of time-base circuit IC1 are output as low level, and the relay J coil does not have electricity in release condition, and electric light does not work;

When needs turn on the light; Bump touch electrode M with finger, the noise signal voltage of human body sensing makes 3 pin of time-base circuit IC1 become high level by output low level by the 2 pin trigger ends that coupling capacitance C1 adds to time-base circuit IC1 at once; The coil of relay J gets electric adhesive, and electric light is lighted.Simultaneously, end the 7 pin inside of time-base circuit IC1, and power supply DC just gives electrochemical capacitor C2 charging through potentiometer RP, regularly just picks up counting;

When the voltage on the electrochemical capacitor C2 rise to the power supply dc voltage 2/3 the time; Electrochemical capacitor C2 makes 3 pin of time-base circuit IC1 change low level into by the output high level through the 7 pin discharge of time-base circuit IC1, and timing finishes; The coil losing electricity of relay J discharges, and the electric light outage is extinguished.

It is the same to be used to control its operation principle of other loads.

Description of drawings

Accompanying drawing 1 is the circuit working schematic diagram with the touch timing switch of time-base circuit NE555 making; IC1 is a time-base circuit in the accompanying drawing 1, and the model of integrated circuit is: NE555; The positive pole of power supply DC links to each other with circuit anode VCC, and the negative pole of power supply DC links to each other with circuit ground GND.

Embodiment

Specification requirement according to circuit working schematic diagram shown in the accompanying drawing 1 and description of drawings and the following stated is implemented, and can realize the present invention.

The selection of components and parts and technical parameter thereof

IC1 is a time-base circuit, and model is NE555, is encapsulated as 8 pin DIP, each pin function: 1 pin is circuit ground GND; 2 pin are trigger end; 3 pin outputs; 4 pin preset ends; 5 pin are control voltage; 6 pin thresholdings (threshold value); 7 pin are discharge end; 8 pin are positive source VCC;

C1 is a coupling capacitance, and capacity is 0.1 μ F; C2 is an electrochemical capacitor, and capacity is 100～2000 μ F/25V; C3 is an electric capacity of the dacron, and capacity is 0.01 μ F;

The resistance of potentiometer RP is 1～1.8M Ω;

D1 is the transwitch diode, in circuit, plays a protective role, and model can select for use 1N4148 perhaps to select silicon rectifier diodes such as 1N4001 for use;

M is a touch electrode, and touch electrode M can select ￠ 12mm or the copper sheet metal making of 10mm * 10mm for use, and the lead-in wire that connects touch electrode M is unsuitable oversize, otherwise lead-in wire is responded to AC signal easily and made circuit generation misoperation;

The J direct current relay; Model is JQX-13F-12V, and relay J has 5 pins, and wherein: the coil of relay J has 2 pins; Its power output has 3 pins, and 3 pin functions are respectively: the common of relay J (moving contact), fixed contact are normally opened contact and normally-closed contact.

Make main points and circuit debugging

The circuit of the touch timing switch made from time-base circuit NE555 is so long as the components and parts performance is intact, installs, gets final product operate as normal after the errorless energising of welding.

Circuit regularly length is determined by the resistance of potentiometer RP, the capacity of electrochemical capacitor C2: T1=1.1 * RP * C2; By the numerical value of being given among the embodiment, the timing scope of circuit is 2～38 minutes; According to supply line and electrical appliance need of work, the capacity of electrochemical capacitor C2 can be selected in 100 μ F to 2000 μ F scopes, and the maximum value of potentiometer RP is 1.8M Ω.

In circuit debugging, can not overturn if find the long-time unlimited time-delay of monostable circuit, should check at first whether electrochemical capacitor C2 exists leaky, secondly be whether the resistance of inspection potentiometer RP is too big.If need to prolong the circuit operation time, should be first-selected with the capacity that increases electrochemical capacitor C2 for well, help eliminating the influence that electrochemical capacitor C2 self leaks electricity the circuit delay reliability is produced like this.

Claims

1. a touch timing switch made from time-base circuit NE555 is made up of power supply DC, touch electrode M, monostable circuit and control relay circuit, and its characteristic comprises:

Monostable circuit is made up of touch electrode M, coupling capacitance C1, time-base circuit IC1, potentiometer RP, electrochemical capacitor C2 and capacitor C 3; Touch electrode M connects the end of coupling capacitance C1; 2 pin of another termination time-base circuit IC1 of capacitor C 1,6 pin of time-base circuit IC1 and 7 pin connect the end of potentiometer RP and the positive pole of electrochemical capacitor C2, the anodal VCC of the other end of potentiometer RP and lever arm connection circuit thereof; The negative pole connection circuit ground GND of electrochemical capacitor C2; The anodal VCC of 4 pin of time-base circuit IC1 and 8 pin connection circuits, 5 pin of time-base circuit IC1 connect an end of capacitor C 3, and 1 pin of the timely basic IC circuit 1 of the other end of capacitor C 3 links to each other with circuit ground GND;

Control relay circuit is made up of relay J and transwitch diode D1, and 3 pin of time-base circuit IC1 are succeeded an end and the transwitch diode D1 negative pole of electrical equipment J coil, the anodal connection circuit ground GND of the other end of relay J coil and transwitch diode D1.

2. the touch timing switch made from time-base circuit NE555 according to claim 1, it is characterized in that: the positive pole of power supply DC links to each other with circuit anode VCC, and the negative pole of power supply DC links to each other with circuit ground GND.

3. the touch timing switch made from time-base circuit NE555 according to claim 1 is characterized in that: touch electrode M selects for use ￠ 12mm or the copper sheet metal of 10mm * 10mm to make.