CN102545871A

CN102545871A - Touch switch circuit assembly

Info

Publication number: CN102545871A
Application number: CN2012100467151A
Authority: CN
Inventors: 黄勇
Original assignee: Individual
Current assignee: Individual
Priority date: 2012-02-27
Filing date: 2012-02-27
Publication date: 2012-07-04

Abstract

The invention relates to a touch switch circuit assembly. The touch switch circuit assembly comprises a 12-V direct-current power source, a touch electrode No, a touch electrode OFF, a CMOS (Complementary Metal-Oxide-Semiconductor Transistor) logic circuit, a level overturning and amplifying circuit and a level output end. The model of a dual-input-end four-NAND-gate integrated circuit IC1 in the CMOS logic circuit is CD4011. A mechanical switch is difficult to use with an instrument and an automatic control circuit in a combined manner. According to the touch switch circuit assembly disclosed by the invention, defects of the mechanical switch are overcome. The touch switch circuit assembly is a circuit for replacing the mechanical switch in an electronic manner. The working state of the circuit can be controlled through the touch electrodes on the touch circuit, and the level output end can directly drive a light control circuit, an electric control circuit, a controllable silicon control circuit or a relay circuit and the like.

Description

The touch switch circuit assembly

Technical field

The invention belongs to electronics and automatic control technology field, is about a kind of touch switch circuit assembly.

Background technology

Be difficult for and the instrument and the combination of automation control circuit of mechanical switch are used.Touch switch circuit assembly of the present invention can overcome some defectives that mechanical switch exists, and it is to utilize the electronics mode to replace a kind of circuit of mechanical switch, through touching the operating state that touch electrode on the circuit can control circuit.The used core parts of this touch switch circuit assembly are CMOS integrated circuit CD4011, and its level output end can directly drive control circuits such as light, electricity, controllable silicon or relay.

Below specify touch switch circuit assembly of the present invention related relevant technologies content in manufacturing process.

Summary of the invention

Goal of the invention and beneficial effect: be difficult for and the instrument and the combination of automation control circuit of mechanical switch are used.Touch switch circuit assembly of the present invention can overcome some defectives that mechanical switch exists, and it is to utilize the electronics mode to replace a kind of circuit of mechanical switch, through touching the operating state that touch electrode on the circuit can control circuit.The used core parts of this touch switch circuit assembly are CMOS integrated circuit CD4011, and its level output end can directly drive control circuits such as light, electricity, controllable silicon or relay.

Circuit working principle:, reach the on-off purpose of control circuit with two touch electrodes of finger touch.Process touch electrode No and touch electrode OFF with sheet metal, when finger did not touch touch electrode No or touch electrode OFF, circuit was not worked; When finger touches touch electrode No and touch electrode OFF simultaneously, be equivalent to insert an equivalent resistance, resistance generally is not less than 0.8M Ω, and circuit is not worked yet;

The model of two inputs, four NAND gate ICs 1 is CD4011; Circuit is connected into has the memory function trigger; The 12nd pin and the 8th pin of two inputs, four NAND gate ICs 1 are received respectively on touch electrode No, the touch electrode OFF; The 11st pin of the 10th pin of two inputs, four NAND gate ICs 1 and two inputs, four NAND gate ICs 1 is output, is high potential first, and another then is an electronegative potential; The 7th pin connection circuit ground GND of two inputs, four NAND gate ICs 1; The anodal VCC of the 14th pin connection circuit of two inputs, four NAND gate ICs 1;

When touching touch electrode No sheet metal with hand; The 12nd pin of two inputs, four NAND gate ICs 1 is an electronegative potential; This moment, the 11st pin of IC1 was a high potential; At this moment to reach the 9th pin of two inputs, four NAND gate ICs 1 be high potential to the 11st pin of two inputs, four NAND gate ICs 1; And the 8th pin of two inputs, four NAND gate ICs 1 also is a high potential, and the 10th pin of two inputs, four NAND gate ICs 1 becomes electronegative potential, and the 5th pin, the 6th pin of delivering to two inputs, four NAND gate ICs 1 are through after the anti-phase; The 4th pin of two inputs, four NAND gate ICs 1 transfers high potential to, connects level output end through resistance R 3 then;

When touching on the circuit touch electrode OFF sheet metal with hand, the 8th pin of two inputs, four NAND gate ICs 1 is an electronegative potential.Therefore, the 10th pin of two inputs, four NAND gate ICs 1 is a high potential, deliver to the 5th pin, the 6th pin anti-phase of IC1 after, the 4th pin of two inputs, four NAND gate ICs 1 transfers electronegative potential to, connects level output end through resistance R 3 at last.

Technical scheme: the touch switch circuit assembly, comprise 12V DC power supply, touch electrode No, touch electrode OFF, CMOS logical circuit, level upset and amplifying circuit, level output end, it is characterized in that:

CMOS logical circuit: form by two inputs, four NAND gate ICs 1, touch electrode No, touch electrode OFF, resistance R 1 and resistance R 2; The model of two inputs, four NAND gate ICs 1 is CD4011; The 12nd pin of one termination, two inputs, the four NAND gate ICs 1 of touch electrode No and resistance R 2; The anodal VCC of the other end connection circuit of resistance R 2; The 8th pin of one termination, two inputs, the four NAND gate ICs 1 of touch electrode OFF and resistance R 1; The anodal VCC of the other end connection circuit of resistance R 1, the 13rd pin of two inputs, four NAND gate ICs 1 links to each other with the 10th pin, and the 9th pin of two inputs, four NAND gate ICs 1 links to each other with the 11st pin; The anodal VCC of the 14th pin connection circuit of two inputs, four NAND gate ICs 1, the 7th pin connection circuit ground GND of two inputs, four NAND gate ICs 1;

Level upset and amplifying circuit: form with resistance R 3 by two inputs, four NAND gate ICs 1; The 5th pin of two inputs, four NAND gate ICs 1 links to each other with the 6th pin and the 10th pin; The end of the 4th pin connecting resistance R3 of two inputs, four NAND gate ICs 1, another termination level output end of resistance R 3.

The positive pole of 12V DC power supply DC links to each other with circuit anode VCC, and the negative pole of 12V DC power supply DC links to each other with circuit ground GND.

Description of drawings

Accompanying drawing 1 is the embodiment circuit working schematic diagram that the present invention provides a touch switch circuit assembly.

Embodiment

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

The parameter of components and parts and selection requirement

IC1 is two inputs, four NAND gate integrated circuits, and the model of selecting for use is CD4011, and embodiment only uses 3 NAND gate circuits wherein;

It is the 1/8W metalfilmresistor that resistance is selected power for use, and resistance R 1 is 9.1M Ω with resistance R 2 resistances; The resistance of resistance R 3 is 2.2K Ω;

Touch electrode No and touch electrode OFF use the sheet metal of size 10mm * 10mm to make respectively, also can use single stamen line peeling to make touch electrode;

The operating voltage of the DC power supply DC of present embodiment is 12V.

Circuit production main points and circuit debugging

For make the touch switch circuit assembly can have forceful electric power power equipment near reliably working, avoid electromagnetic interference, the lead-in wire of touch electrode No and touch electrode OFF is as far as possible away from other pins of two inputs, four NAND gate ICs 1;

Two inputs, four NAND gate ICs 1 are the CMOS integrated circuit, and it is easy to damage because of static discharge.Therefore, when welding two inputs, four NAND gate ICs 1 pin the time, must keep human body and circuit board to connect protection ground.Can use the IC socket in case of necessity, to prevent that IC1 is damaged by static in welding process; The pin that two inputs, four NAND gate ICs 1 do not use is ground connection all!

Require the circuit board outside to use metal shell, and metal shell should reliably be connected with circuit ground GND.

Claims

1. a touch switch circuit assembly comprises 12V DC power supply, touch electrode No, touch electrode OFF, CMOS logical circuit, level upset and amplifying circuit, level output end, it is characterized in that:

The CMOS logical circuit is made up of two inputs, four NAND gate ICs 1, touch electrode No, touch electrode OFF, resistance R 1 and resistance R 2; The 12nd pin of one termination, two inputs, the four NAND gate ICs 1 of touch electrode No and resistance R 2; The anodal VCC of the other end connection circuit of resistance R 2; The 8th pin of one termination, two inputs, the four NAND gate ICs 1 of touch electrode OFF and resistance R 1; The anodal VCC of the other end connection circuit of resistance R 1, the 13rd pin of two inputs, four NAND gate ICs 1 links to each other with the 10th pin, and the 9th pin of two inputs, four NAND gate ICs 1 links to each other with the 11st pin; The anodal VCC of the 14th pin connection circuit of two inputs, four NAND gate ICs 1, the 7th pin connection circuit ground GND of two inputs, four NAND gate ICs 1;

Level upset and amplifying circuit are made up of with resistance R 3 two inputs, four NAND gate ICs 1; The 5th pin of two inputs, four NAND gate ICs 1 links to each other with the 6th pin and the 10th pin; The end of the 4th pin connecting resistance R3 of two inputs, four NAND gate ICs 1, another termination level output end of resistance R 3.

2. contact witch circuit according to claim 1 is characterized in that: the model that two inputs, four NAND gate ICs 1 are selected for use in the CMOS logical circuit is CD4011.

3. contact witch circuit according to claim 1 is characterized in that: the positive pole of 12V DC power supply links to each other with circuit anode VCC, and the negative pole of 12V DC power supply links to each other with circuit ground GND.