CN206461588U - A kind of touch key-press circuit board function shows circuit - Google Patents

Abstract

Circuit is shown the utility model discloses a kind of touch key-press circuit board function, reset circuit of SCM IC2, the first touch sensible module I C3, the second touch sensible module I C4,14 paths of LEDs drive circuits, 58 paths of LEDs drive circuits, array of display drive circuit IC5, the 5th 8 paths of LEDs plug socket, 16 road single-point keystroke interfaces, 12 road resistance simulation variable quantity input interfaces, 4*4 keypads interface, driving tube Q1 and power circuit are electrically connected with single-chip microcomputer IC1, and power circuit provides 3.3V DC voltages；Input connection the first touch sensible module I C3 and the second touch sensible module I C4 of 32 road external socket winding displacements；14 paths of LEDs drive circuits and array of display drive circuit IC5 output end connection group of four figures tube display circuit；Driving tube Q1 connection buzzers.Circuit power consumption of the present utility model is small, and triggering precision is high, strong antijamming capability.Triggered key press sensitivity is high, the sensitive stabilization of touch sensible and it is reliable.

Description

A kind of touch key-press circuit board function shows circuit

Technical field

The utility model is related to a kind of touch key-press circuit board function displaying circuit.

Background technology

In automatic-detection control field, sensing touching technique is widely applied, at present the more sensing of prevalence Touching technique is broadly divided into four types：Resistance-type, capacitor induction type, infrared-type and surface acoustic wave type.In industrial circle Most commonly resistive and capacitor induction type.

Resistance-type sensing touching technique (is received using two layers of transparency conducting layer-ITO being coated between superficial layer and basic unit Rice indium tin oxide), it can connect this two conductive layer when touching the pressure that produces, when pressing different points, the point is to defeated The resistance value for going out end is also just different, therefore can export the voltage signal (analog quantity) corresponding with the position, is changed by A/D X, Y coordinate value can be obtained afterwards.The benefit of resistive touch technology is cheap, it is easy to produced, but because of used ITO Coating is easier to brittle failure, and the translucency and definition of screen are poor, are easily scratched, and precision is relatively low and service life is not long.

Capacitive induction touching technique is by detecting that the electric charge that human finger is brought is moved, because finger is in mobile mistake Cheng Zhonghui siphons away the electric current of a very little, and the current value that different key positions is siphoned away is different, and controller passes through to difference The accurate calculating of current ratio, you can contacting points position is drawn, so as to realize keypress function.Capacitance type touch key need not be passed The mechanical contact of system button, the potential safety hazard for also not using direct body contact's sheet metal when conventional metals are touched and bringing And application limitation.Capacitance type touch key has reliability and durability, fashion attractive in appearance, is easy to production to install and safeguard, takes For tradition machinery button key and metal touching key.

Up to the present also it is used for without special to resistance sensing touch class and capacitive sensing touch class button circuit board Carry out the displaying of various functions.

Utility model content

The purpose of this utility model is to provide touch key-press circuit board function displaying circuit.

The technical scheme for realizing the utility model purpose is that a kind of touch key-press circuit board function shows circuit, including monolithic Machine IC1, reset circuit of SCM IC2, the first touch sensible module I C3, the driving of the second touch sensible module I C4,1-4 paths of LEDs Circuit, 5-8 paths of LEDs drive circuit, array of display drive circuit IC5, group of four figures tube display circuit, 32 road external socket rows Line, 5-8 paths of LEDs plug socket, 16 road single-point keystroke interfaces, 12 road resistance simulation variable quantity input interfaces, 4*4 keypads connect Mouth, buzzer, driving tube Q1 and power circuit；The reset circuit of SCM IC2, the first touch sensible module I C3, second touch Touch induction module IC4,1-4 paths of LEDs drive circuit, 5-8 paths of LEDs drive circuit, array of display drive circuit IC5,5-8 roads LED plug sockets, 16 road single-point keystroke interfaces, 12 road resistance simulation variable quantity input interfaces, 4*4 keypads interface, driving tube Q1 Electrically connected with power circuit with single-chip microcomputer IC1, power circuit provides 3.3V DC voltages；The 32 road external socket winding displacement Input connects the first touch sensible module I C3 and the second touch sensible module I C4；The 1-4 paths of LEDs drive circuit and display Array drive circuit IC5 output end connection group of four figures tube display circuit；The driving tube Q1 connections buzzer.

The model STM32F303VCT6 of the single-chip microcomputer IC1.

The model SP808K of the reset circuit of SCM IC2.

The first touch sensible module I C3 and the second touch sensible module I C4 using model WTC801SPI 8 keys+ 1 roller draw runner capacitance touch induction chip.

The model ULN2803 of the array of display drive circuit IC5.

The output end of the single-chip microcomputer IC1 connection reset circuit of SCM IC2；The single-chip microcomputer IC1 connections first are touched Induction module IC3 and the second touch sensible module I C4 output end, the first touch sensible module I C3 and the second touch sensible mould Block IC4 input gathers the signal of 32 single-point capacitance touch induction end by 32 road external socket winding displacements；Single-chip microcomputer IC1 connects The input of array of display drive circuit IC5 and 1- the 4th paths of LEDs drive circuit is connect, by array of display drive circuit IC5 and The paths of LEDs drive circuits of 1- the 4th drive group of four figures tube display circuit；The single-chip microcomputer IC1 connection paths of LEDs drive circuits of 5- the 8th Input, pass through the paths of LEDs drive circuits of 5- the 8th drive 5-8 paths of LEDs plug sockets；Every road of 5-8 paths of LEDs plug sockets LED plug sockets connect 7 LEDs；Single-chip microcomputer IC1 connection driving tubes Q1 base stage, driving tube Q1 driving buzzers send the sound； The road single-point keystroke interface of single-chip microcomputer IC1 connections 16,12 road resistance simulation variable quantity input interfaces and 4*4 keypad interfaces, are received Switch input signal, the change of collection resistance simulation and external connection keyboard input signal.

Above-mentioned technical proposal is employed, the utility model has following beneficial effect：(1) circuit of the present utility model can To gather the various input signals on touch key-press, such as switching value, analog quantity, resistance change, capacitance change etc., it is then defeated All kinds of instructions and the work of acoustic image device gone out on signal control touch key-press, device power consumption is small, and triggering precision is high, antijamming capability By force.Triggered key press sensitivity is high, the sensitive stabilization of touch sensible and it is reliable.

(2) the utility model controls touch sensible chips W TC80SPI, energy by model STM32F303VCT6 single-chip microcomputer Input the continuous draw runner signal in 8 touch sensible ends, and 16 touch induction end roller signal, it can be very sensitive and accurate Touch location of the finger on roller/draw runner really is detected, and touch position data is exported by SPI.

(3) the utility model is furnished with 4*4 switching value keyboard signal input；Single 16 way switch amount signal input part； 12 road resistance simulation variable quantity inputs, with 4 Digital sum pipe output ends；Buzzer warning points out output end all the way；Equipped with 28 The single led light emitting diode output end in road.

(4) the utility model triggering precision is high, and strong antijamming capability can automatically adjust film key induction sensitivity, has There is automatic power save function, its operating current is 1.2mA or so under the conditions of 3V.

Brief description of the drawings

In order that content of the present utility model is easier to be clearly understood, below according to specific embodiment and with reference to attached Figure, is described in further detail to the utility model, wherein

Fig. 1 is theory diagram of the present utility model.

Fig. 2 is single-chip microcomputer IC1 of the present utility model circuit diagram.

Fig. 3 is the first touch sensible module I C3 of the present utility model circuit diagram.

Embodiment

(embodiment 1)

See Fig. 1 to Fig. 3, a kind of touch key-press circuit board function displaying circuit of the present embodiment, including single-chip microcomputer IC1, list Piece machine reset circuit IC2, the first touch sensible module I C3, the second touch sensible module I C4,1-4 paths of LEDs drive circuit, 5-8 Paths of LEDs drive circuit, array of display drive circuit IC5, group of four figures tube display circuit, 32 road external socket winding displacements, 5-8 Paths of LEDs plug socket, 16 road single-point keystroke interfaces, 12 road resistance simulation variable quantity input interfaces, 4*4 keypads interface, buzzer, Driving tube Q1 and power circuit；Reset circuit of SCM IC2, the first touch sensible module I C3, the second touch sensible module I C4, 1-4 paths of LEDs drive circuit, 5-8 paths of LEDs drive circuit, array of display drive circuit IC5,5-8 paths of LEDs plug socket, 16 tunnels are single Point keystroke interface, 12 road resistance simulation variable quantity input interfaces, 4*4 keypads interface, driving tube Q1 and power circuit with list Piece machine IC1 is electrically connected, and power circuit provides 3.3V DC voltages；The input connection first of 32 road external socket winding displacements touches sense Answer module I C3 and the second touch sensible module I C4；The output end of 1-4 paths of LEDs drive circuit and array of display drive circuit IC5 Connect group of four figures tube display circuit；Driving tube Q1 connection buzzers.Single-chip microcomputer IC1 model STM32F303VCT6.It is single Piece machine reset circuit IC2 model SP808K.First touch sensible module I C3 and the second touch sensible module I C4 use type Number be WTC801SPI the roller draw runner capacitance touch induction chip of 8 key+1.Array of display drive circuit IC5 model ULN2803。

Specifically, the core of the circuit of the present embodiment is single-chip microcomputer IC1, is responsible for the work of whole circuit by it.Monolithic Machine IC1 connection reset circuit of SCM IC2 output end；Single-chip microcomputer IC1 connections the first touch sensible module I C3 and second is touched Induction module IC4 output end, the first touch sensible module I C3 and the second touch sensible module I C4 input pass through 32 tunnels External socket winding displacement gathers the signal of 32 single-point capacitance touch induction end；Single-chip microcomputer IC1 connection array of display drive circuits IC5 With the input of the paths of LEDs drive circuits of 1- the 4th, driven by array of display drive circuit IC5 and 1- the 4th paths of LEDs drive circuit Dynamic group of four figures tube display circuit；The input of the single-chip microcomputer IC1 connection paths of LEDs drive circuits of 5- the 8th, passes through 5- the 8th Paths of LEDs drive circuit drives 5-8 paths of LEDs plug sockets；Every paths of LEDs plug socket of 5-8 paths of LEDs plug sockets connects 7 LED Lamp；Single-chip microcomputer IC1 connection driving tubes Q1 base stage, driving tube Q1 driving buzzers send the sound；The tunnel of single-chip microcomputer IC1 connections 16 is single Point keystroke interface, 12 road resistance simulation variable quantity input interfaces and 4*4 keypad interfaces, receive switch input signal, collection electricity Hinder analog variation and external connection keyboard input signal.First touch sensible module I C3 and the second touch sensible module I C4 can input 8 The individual continuous draw runner signal in touch sensible end, and 16 touch induction end roller signal, 48 single-point electricity altogether can also be constituted Hold touch sensible input, it can be very sensitive and detects touch location of the finger on roller/draw runner exactly, and Touch position data is exported by SPI.

Particular embodiments described above, has carried out entering one to the purpose of this utility model, technical scheme and beneficial effect Step is described in detail, be should be understood that and be the foregoing is only specific embodiment of the utility model, is not limited to this Utility model, all within spirit of the present utility model and principle, any modification, equivalent substitution and improvements done etc. all should be wrapped It is contained within protection domain of the present utility model.

Claims (6)

1. a kind of touch key-press circuit board function shows circuit, it is characterised in that：Including single-chip microcomputer IC1, reset circuit of SCM IC2, the first touch sensible module I C3, the second touch sensible module I C4,1-4 paths of LEDs drive circuit, 5-8 paths of LEDs driving electricity Road, array of display drive circuit IC5, group of four figures tube display circuit, 32 road external socket winding displacements, 5-8 paths of LEDs sockets Seat, 16 road single-point keystroke interfaces, 12 road resistance simulation variable quantity input interfaces, 4*4 keypads interface, buzzer, driving tube Q1 And power circuit；The reset circuit of SCM IC2, the first touch sensible module I C3, the second touch sensible module I C4,1-4 Paths of LEDs drive circuit, 5-8 paths of LEDs drive circuit, array of display drive circuit IC5,5-8 paths of LEDs plug socket, 16 road single-points Keystroke interface, 12 road resistance simulation variable quantity input interfaces, 4*4 keypads interface, driving tube Q1 and power circuit are and monolithic Machine IC1 is electrically connected, and power circuit provides 3.3V DC voltages；The input connection first of the 32 road external socket winding displacement is touched Induction module IC3 and the second touch sensible module I C4；1-4 paths of LEDs drive circuit and array of display the drive circuit IC5's Output end connects group of four figures tube display circuit；The driving tube Q1 connections buzzer.

2. a kind of touch key-press circuit board function displaying circuit according to claim 1, it is characterised in that：The single-chip microcomputer IC1 model STM32F303VCT6.

3. a kind of touch key-press circuit board function displaying circuit according to claim 2, it is characterised in that：The single-chip microcomputer Reset circuit IC2 model SP808K.

4. a kind of touch key-press circuit board function displaying circuit according to claim 3, it is characterised in that：Described first touches Touch the roller draw runner capacitive touch of 8 key+1 that induction module IC3 and the second touch sensible module I C4 uses model WTC801SPI Touch induction chip.

5. a kind of touch key-press circuit board function displaying circuit according to claim 4, it is characterised in that：The display battle array Column drive circuit IC5 model ULN2803.

6. a kind of touch key-press circuit board function displaying circuit according to claim 5, it is characterised in that：The single-chip microcomputer IC1 connection reset circuit of SCM IC2 output end；Single-chip microcomputer IC1 connections the first touch sensible module I C3 and second is touched Touch induction module IC4 output end, the first touch sensible module I C3 and the second touch sensible module I C4 input pass through 32 Road external socket winding displacement gathers the signal of 32 single-point capacitance touch induction end；Single-chip microcomputer IC1 connection array of display drive circuits IC5 and the paths of LEDs drive circuits of 1- the 4th input, by array of display drive circuit IC5 and 1- the 4th paths of LEDs drive circuit Drive group of four figures tube display circuit；The input of the single-chip microcomputer IC1 connection paths of LEDs drive circuits of 5- the 8th, passes through 5- 8 paths of LEDs drive circuits drive 5-8 paths of LEDs plug sockets；Every paths of LEDs plug socket of 5-8 paths of LEDs plug sockets connects 7 LED Lamp；Single-chip microcomputer IC1 connection driving tubes Q1 base stage, driving tube Q1 driving buzzers send the sound；The tunnel of single-chip microcomputer IC1 connections 16 is single Point keystroke interface, 12 road resistance simulation variable quantity input interfaces and 4*4 keypad interfaces, receive switch input signal, collection electricity Hinder analog variation and external connection keyboard input signal.