CN207280572U - A kind of LED is positive and negative to push away display capacitor touch button electronic scale - Google Patents

Abstract

The utility model discloses a kind of positive and negative push away of LED to show capacitor touch button electronic scale, it is related to electronic scale technical field；Programming circuitry is connected with main control chip, power module respectively with capacitance touching control circuit, main control chip connects, master control external circuits, LED display logic circuits are connected with main control chip, bus is connected with 8 reduced instruction kernels, low-voltage detection circuit, house dog, internal reset circuit, interrupt control unit, inner high speed oscillator, internal low speed oscillator is connected with 8 reduced instruction kernels, the data storage one, program storage, data storage two, time base circuit, clock module, input/output interface, serial bus module is connected with each other with bus, programming circuitry respectively with data storage one, program storage connects；The utility model AD high accuracy, seniority top digit save resource and cost, and versatility is high.

Description

A kind of LED is positive and negative to push away display capacitor touch button electronic scale

Technical field：

It the utility model is related to a kind of positive and negative push away of LED and show capacitor touch button electronic scale, belong to electronic scale technical field.

Background technology：

Shown at present in most of electronic scale, be all traditional LCD liquid crystal displays or LED multistage numeral methods. , it is necessary to which IC supports to promote the function module of liquid crystal in resource, and it is more for the I/O port resource occupation of microcontroller.

Utility model content：

In view of the above-mentioned problems, display capacitive touch is pushed away the technical problem to be solved by the present invention is to provide a kind of LED is positive and negative Control keying electronic scale.

A kind of LED of the utility model is positive and negative to push away display capacitor touch button electronic scale, it includes power module, capacitive touch Control circuit, master control external circuits, programming circuitry, LED display logics circuit, main control chip；Programming circuitry is connected with main control chip, Power module is connected with capacitance touching control circuit, main control chip respectively, and master control external circuits, LED display logics circuit are and master control Chip connects, and the main control chip includes programming circuitry, data storage one, program storage, data storage two, Shi Ji electricity Road, low-voltage reset circuit, low-voltage detection circuit, house dog, 8 reduced instruction kernels, internal reset circuit, interruption control It is device, inner high speed oscillator, internal low speed oscillator, 24 analog-digital converters, low pressure difference linear voltage regulator, clock module, defeated Enter/output interface, serial bus module, bus, bus is connected with 8 reduced instruction kernels, and low-voltage detection circuit, guard the gate Dog, internal reset circuit, interrupt control unit, inner high speed oscillator, internal low speed oscillator connect with 8 reduced instruction kernels Connect, the data storage one, program storage, data storage two, time base circuit, clock module, input/output interface, Serial bus module is connected with each other with bus, and programming circuitry is connected with data storage one, program storage respectively.

Preferably, the power module includes control chip three, connector, capacitance two, capacitance three；Control chip three 2 feet with connector, one end of capacitance two are connected and are grounded 1 foot respectively, 1 foot of the connector and 2 feet of control chip three Connection, the other end with capacitance two, one end of capacitance three are connected 3 feet of control chip three respectively, the other end ground connection of capacitance three.

Preferably, the capacitance touching control circuit include control chip two, resistance one, resistance two, capacitance one, capacitance eight, Capacitance nine, triode one, triode two；One end with capacitance eight, one ON of welding ends are connected 1 foot of control chip two respectively, electricity Hold eight other end ground connection, 2 feet of control chip two are connected with capacitance nine, two UNIT of welding ends respectively, the other end of capacitance nine Ground connection, 4 feet of control chip two are connected with one end of capacitance one, power end, the other end of capacitance one respectively with control chip two 5 feet, the connection of 6 feet and be grounded, 7 feet of the control chip two are connected with one end of resistance two, the other end of resistance two and three The base stage connection of pole pipe two, the emitter ground connection of triode two, 8 feet of control chip two are connected with one end of resistance one, resistance One other end is connected with the base stage of triode one, the emitter ground connection of triode one.

Preferably, the master control external circuits include AD signal acquisitions, LED shows I/O interface.

Preferably, the programming circuitry includes the microcontroller of a FLASH processing procedure, being provided with burning on microcontroller connects Mouthful.

Compared with prior art, the beneficial effects of the utility model are：AD high accuracy, seniority top digit, saves resource and cost, Versatility is high.

Brief description of the drawings：

For ease of explanation, the utility model is described in detail by following specific implementations and attached drawing.

Fig. 1 is the structure diagram inside main control chip in the utility model；

Fig. 2 is the schematic diagram of power module in the utility model；

Fig. 3 is the schematic diagram of capacitance touching control circuit in the utility model；

Fig. 4 is the schematic diagram of master control external circuits in the utility model；

Fig. 5 is the schematic diagram of programming circuitry in the utility model；

Fig. 6 is the schematic diagram of LED display logic circuits in the utility model.

Embodiment：

To make the objectives, technical solutions and advantages of the present invention clearer, below by showing in attached drawing Specific embodiment describes the utility model.However, it should be understood that these descriptions are merely illustrative, and it is not intended to limit this reality With new scope.In addition, in the following description, the description to known features and technology is eliminated, to avoid unnecessarily mixing Confuse the concept of the utility model.

As shown in Figures 1 to 6, present embodiment uses following technical scheme：It includes power module, capacitance touching control Circuit, master control external circuits, programming circuitry, LED display logics circuit, main control chip；Programming circuitry is connected with main control chip, electricity Source module is connected with capacitance touching control circuit, main control chip respectively, master control external circuits, LED display logics circuit with master control core Piece connects, and the main control chip includes programming circuitry, data storage one, program storage, data storage two, Shi Ji electricity Road, low-voltage reset circuit, low-voltage detection circuit, house dog, 8 reduced instruction kernels, internal reset circuit, interruption control It is device, inner high speed oscillator, internal low speed oscillator, 24 analog-digital converters, low pressure difference linear voltage regulator, clock module, defeated Enter/output interface, serial bus module, bus, bus is connected with 8 reduced instruction kernels, and low-voltage detection circuit, guard the gate Dog, internal reset circuit, interrupt control unit, inner high speed oscillator, internal low speed oscillator connect with 8 reduced instruction kernels Connect, the data storage one, program storage, data storage two, time base circuit, clock module, input/output interface, Serial bus module is connected with each other with bus, and programming circuitry is connected with data storage one, program storage respectively.

Further, the power module includes three U3 of control chip, connector, two C2 of capacitance, three C3 of capacitance；Control core 2 feet with connector, one end of two C2 of capacitance are connected and are grounded 1 foot of three U3 of piece respectively, 1 foot and the control core of the connector The 2 feet connection of three U3 of piece, the other end with two C2 of capacitance, one end of three C3 of capacitance are connected 3 feet of three U3 of control chip respectively, electricity Hold the other end ground connection of three C3.Utilize a LDO, there is provided a stable VCC=3V operating voltage gives touch IC, main control MCU Directly pass through external power supply power supply BAT=4.5V (three section dry cells).

Further, the capacitance touching control circuit include two U2 of control chip, one R1 of resistance, two R2 of resistance, one C1 of capacitance, Eight C8 of capacitance, nine C9 of capacitance, one Q1 of triode, two Q2 of triode；1 foot of two U2 of control chip respectively with eight C8 of capacitance one End, one ON connections of welding ends, the other end of eight C8 of capacitance are grounded, 2 feet of two U2 of control chip respectively with nine C9 of capacitance, welding ends Two UNIT connections, the other end ground connection of nine C9 of capacitance, 4 feet of two C2 of control chip connect with one end of one C1 of capacitance, power end Connecing, 5 feet with two U2 of control chip, 6 feet are connected and are grounded the other end of one C1 of capacitance respectively, and the 7 of two U2 of control chip Foot is connected with one end of two R2 of resistance, and the other end of two R2 of resistance is connected with the base stage of two Q2 of triode, the hair of two Q2 of triode Emitter grounding, 8 feet of two U2 of control chip are connected with one end of one R1 of resistance, and the other end of one R1 of resistance is with one Q1's of triode Base stage connects, the emitter ground connection of one Q1 of triode.Touch-control pad is directly connected to microcontroller.When having finger or other objects During close to touch-control pad, the capacitance of pad can change.After this variable quantity is single chip computer measurement and confirmation, it is transformed into control Signal, there is provided give main control MCU interface.

Further, the master control external circuits include AD signal acquisitions, LED shows I/O interface.

Further, the programming circuitry includes the microcontroller of a FLASH processing procedure, and being provided with burning on microcontroller connects Mouthful, for burning/recording chip and it is subsequently product up-gradation.

Further, the LED display logics circuit utilizes the one-way conduction of diode, designs displaying principle.

The operation principle of present embodiment is：A, LED display circuit working method for I/O port it is positive and negative push away light it is luminous Diode.Using diode unilateral conduction, two lamp both ends are connected on respectively using two I/O ports, two lamp different directions, are set I/O port level state is the light on and off of controllable lamp, and when A mouthfuls high B mouthfuls low, 1 signal lamp is bright, and 2 signal lamps go out, reverse A mouthfuls of B mouthfuls of level shape State, 1 signal lamp, 2 signal lamps that go out are bright.Using this principle and persistence of vision effect, fractional scanning shows LED light, extends LED lamp quantity Reach the requirement for meeting that multiple digital is shown.

B, capacitance touching control formula button, usually in holding state, power consumption 3uA-4uA.Working method is relatively simple, when have by Key pressing wakes up work, operating current about 1mA.Control work and dormancy and other functions of main control MCU.

C, main control MCU works.24-bit Delta Sigma A/D, pass through A/ by the analog voltage signal of gravity sensor D is converted to digital signal, by Digital Signal Processing is gravimetric value using specific algorithm.Operating current is according to display LED quantity determines, maximum complete machine electric current 80mA.

The advantages of present embodiment, is as follows：

A), AD high accuracy, seniority top digit.24-bit Delta Sigma A/D, principle are similar to integrated AD converter, will Voltage conversion is time (pulse width) signal, and digital value, the AD architecture digitals of this type are obtained after being handled with digital filter The substantially easy singualtion in part, is easily able to high-resolution.

B), LED shows that structure saves resource and cost.Generally require the product of display, be required for MCU support LCD or LED function module, and the display interface of corresponding number is needed, but the positive and negative display modes pushed away of LED, it is only necessary to enough I/O ports It can complete normally to show, show that a 7 segment numeral pipes need 5 I/O ports, often increase the display of a 7 segment numeral pipes, increase Add one IO mouthfuls.Light emitting diode cost is relatively cheap very much.

C), versatility is high.LED display circuit, it can show that client can be according to the display of oneself for the various demands of client Panel changes display demand.

In the description of the utility model, unless otherwise clearly defined and limited, term " installation ", " connected ", " company Connect ", " fixation " should be interpreted broadly, for example, it may be fixedly connected or be detachably connected, or integrally；Can be Mechanically connect or be electrically connected；It can be directly connected, can also be indirectly connected by intermediary, can be two The interaction relationship of connection or two elements inside element.For the ordinary skill in the art, can be specific Situation understands concrete meaning of the above-mentioned term in the utility model.

The standardized element that the utility model uses can commercially, shaped piece according to specification and attached drawing Record can carry out customized, the specific connection mode of each part is using bolt ripe in the prior art, rivet, weldering The conventional means such as connect, machinery, part and equipment are using in the prior art, conventional model, plus circuit connection using existing Conventional connection mode in technology, this will not be detailed here.

It is obvious to a person skilled in the art that the utility model is not limited to the details of above-mentioned one exemplary embodiment, and And in the case of the spirit or essential attributes without departing substantially from the utility model, it can realize that this practicality is new in other specific forms Type.Therefore, in all respects, the present embodiments are to be considered as illustrative and not restrictive, this practicality is new The scope of type is indicated by the appended claims rather than the foregoing description, it is intended that the equivalency fallen in claim is contained All changes in justice and scope are embraced therein.Any reference numeral in claim should not be considered as limitation Involved claim.

Moreover, it will be appreciated that although the present specification is described in terms of embodiments, not each embodiment is only wrapped Containing an independent technical solution, this narrating mode of specification is only that those skilled in the art should for clarity Using specification as an entirety, the technical solutions in the various embodiments may also be suitably combined, forms those skilled in the art It is appreciated that other embodiment.

Claims (5)

1. a kind of LED is positive and negative to push away display capacitor touch button electronic scale, it is characterised in that：It includes power module, capacitance touching control Circuit, master control external circuits, programming circuitry, LED display logics circuit, main control chip；Programming circuitry is connected with main control chip, electricity Source module is connected with capacitance touching control circuit, main control chip respectively, master control external circuits, LED display logics circuit with master control core Piece connects, and the main control chip includes programming circuitry, data storage one, program storage, data storage two, Shi Ji electricity Road, low-voltage reset circuit, low-voltage detection circuit, house dog, 8 reduced instruction kernels, internal reset circuit, interruption control It is device, inner high speed oscillator, internal low speed oscillator, 24 analog-digital converters, low pressure difference linear voltage regulator, clock module, defeated Enter/output interface, serial bus module, bus, bus is connected with 8 reduced instruction kernels, and low-voltage detection circuit, guard the gate Dog, internal reset circuit, interrupt control unit, inner high speed oscillator, internal low speed oscillator connect with 8 reduced instruction kernels Connect, the data storage one, program storage, data storage two, time base circuit, clock module, input/output interface, Serial bus module is connected with each other with bus, and programming circuitry is connected with data storage one, program storage respectively.

2. a kind of LED according to claim 1 is positive and negative to push away display capacitor touch button electronic scale, it is characterised in that：It is described Power module includes control chip three, connector, capacitance two, capacitance three；1 foot of control chip three respectively 2 feet with connector, One end of capacitance two connects and is grounded, and 1 foot of the connector is connected with 2 feet of control chip three, 3 feet point of control chip three The other end, one end of capacitance three not with capacitance two are connected, the other end ground connection of capacitance three.

3. a kind of LED according to claim 1 is positive and negative to push away display capacitor touch button electronic scale, it is characterised in that：It is described Capacitance touching control circuit includes control chip two, resistance one, resistance two, capacitance one, capacitance eight, capacitance nine, triode one, triode Two；One end with capacitance eight, one ON of welding ends are connected 1 foot of control chip two respectively, and the other end ground connection of capacitance eight, controls core 2 feet of piece two are connected with capacitance nine, two UNIT of welding ends respectively, the other end ground connection of capacitance nine, 4 feet and the electricity of control chip two Hold one one end, power end connection, 5 feet with control chip two, 6 feet are connected and are grounded the other end of capacitance one respectively, described 7 feet of control chip two are connected with one end of resistance two, and the other end of resistance two is connected with the base stage of triode two, triode two Emitter ground connection, 8 feet of control chip two are connected with one end of resistance one, the other end of resistance one and the base stage of triode one Connection, the emitter ground connection of triode one.

4. a kind of LED according to claim 1 is positive and negative to push away display capacitor touch button electronic scale, it is characterised in that：It is described Master control external circuits include AD signal acquisitions, LED shows I/O interface.

5. a kind of LED according to claim 1 is positive and negative to push away display capacitor touch button electronic scale, it is characterised in that：It is described Programming circuitry includes the microcontroller of a FLASH processing procedure, and burning interface is provided with microcontroller.