CN204578511U - The circuit structure of the many capacitance touch buttons of a kind of single line - Google Patents
The circuit structure of the many capacitance touch buttons of a kind of single line Download PDFInfo
- Publication number
- CN204578511U CN204578511U CN201520427309.9U CN201520427309U CN204578511U CN 204578511 U CN204578511 U CN 204578511U CN 201520427309 U CN201520427309 U CN 201520427309U CN 204578511 U CN204578511 U CN 204578511U
- Authority
- CN
- China
- Prior art keywords
- circuit
- touch
- analog
- key
- digital conversion
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Abstract
A circuit structure for the many capacitance touch buttons of single line, comprises key-press module, sensor circuit, capacitive touch circuit, microcontroller; Described key-press module comprises multiple touch key-press, the output of each touch key-press connects the input of a sensor circuit, the output of sensor circuit connects the input of capacitive touch circuit, the output of capacitive touch circuit connects the input of microcontroller, described microcontroller comprises analog-to-digital conversion Acquisition Circuit, and analog-to-digital conversion Acquisition Circuit is electrically connected with capacitive touch circuit by analog-to-digital conversion line.The capacitance variation produced when the utility model can well sense that finger is pressed by sensor circuit, it is which sensor circuit is triggered that the change of capacitance is analyzed by capacitive touch circuit, again corresponding trigger feedback on the magnitude of voltage of analog-to-digital conversion Acquisition Circuit, after analog-to-digital conversion Acquisition Circuit collects different magnitudes of voltage, can tell concrete operations person is which key pressed, and total only just completes complicated capacitance touch button identification with an analog-to-digital conversion line.
Description
Technical field
The utility model relates to capacitive touch technology, particularly relates to the circuit structure of the many capacitance touch buttons of a kind of single line.
Background technology
In the application of the Large Copacity such as portable electronic device and mobile handheld terminal, high visual product, touch key-press is widely adopted.Facilitate easy-to-use because it has, the advantage of fashion and low cost, increasing electronic product starts to turn to touch-key from traditional mechanical key.
Touch key-press scheme advantage: 1, without any mechanical part, can not wear and tear, infinite life, reduces later maintenance cost.2, its sensing part can be placed into after any insulating barrier (being generally glass or plastic material), is easy to make the keyboard sealed mutually with surrounding environment.To play the effect of moistureproof and waterproof.3, panel pattern is followed one's bent, and button size, shape design arbitrarily, and character, trade mark, window etc. are collocation arbitrarily, and aesthetic in appearance, fashion is colour-fast, indeformable, durable in use.Fundamentally solve various metal decking and various mechanical panel to be beyond one's reach effect.Its reliability and design for aesthetic randomness, directly can replace existing general panels (metal keyboard, membrane keyboard, conducting resinl keyboard), and give your product multiplication vigor.4, touch key-press plate can provide the multiple interfaces such as UART, IIC, SPI, meets various product interface requirements.
In a lot of design of electronic products, because function more complicated often there will be the pin that MCU resource not enough situation, particularly touch key-press often need the MCU of more than three, this is complexity to product design band.Mentioning problem above how effectively solving, when particularly also using capacitance touch button, solve problem with minimum pin, is the comparison urgent problems often run in design at present.
Utility model content
The purpose of this utility model is to overcome the deficiencies in the prior art, provides the circuit structure of the many capacitance touch buttons of a kind of single line, raises the efficiency, and structure is simple, reduces cost.
In order to achieve the above object, the technical solution adopted in the utility model is:
A circuit structure for the many capacitance touch buttons of single line, comprises key-press module, sensor circuit, capacitive touch circuit, microcontroller; Described key-press module comprises multiple touch key-press, the output of each touch key-press connects the input of a sensor circuit, the output of sensor circuit connects the input of capacitive touch circuit, the output of capacitive touch circuit connects the input of microcontroller, described microcontroller comprises analog-to-digital conversion Acquisition Circuit, and analog-to-digital conversion Acquisition Circuit is electrically connected with capacitive touch circuit by analog-to-digital conversion line.
Further, described sensor circuit is made up of FTC334C touch key-press chip.
Further, described capacitive touch circuit is made up of FTC334C touch key-press chip, and the input of FTC334C touch key-press chip connects the output of sensor circuit.
Further, described analog-to-digital conversion Acquisition Circuit is made up of FTC334C touch key-press chip.
Further, described microcontroller also comprises an anti-jamming circuit, and described anti-jamming circuit is electrically connected with analog-to-digital conversion Acquisition Circuit.
Further, described anti-jamming circuit is made up of electric capacity and resistance, particularly utilizes the electric capacity of 10uF 25V and the resistance of 1K to reduce electrostatic interference.
Compared with prior art, the beneficial effects of the utility model are: the capacitance variation produced when can well sense that finger is pressed by sensor circuit, it is which sensor circuit is triggered that the change of capacitance is analyzed by capacitive touch circuit, again corresponding trigger feedback on the magnitude of voltage of analog-to-digital conversion Acquisition Circuit, after analog-to-digital conversion Acquisition Circuit collects different magnitudes of voltage, can tell concrete operations person is which key pressed, for guaranteeing extraneous interference, add anti-jamming circuit, reach good stabilization effect, total only just completes complicated capacitance touch button identification with an analog-to-digital conversion line, save system resource.
Accompanying drawing explanation
Fig. 1 is overall structure circuit theory diagrams of the present utility model;
fig. 2 is capacitive touch circuit concrete structure schematic diagram of the present utility model.
Embodiment
Be described in detail, to be interpretated more in-depth technical characteristic of the present utility model and advantage with reference to accompanying drawing below in conjunction with embodiment.
As shown in Figure 1, the circuit structure of the many capacitance touch buttons of a kind of single line, comprises key-press module, sensor circuit, capacitive touch circuit, microcontroller to overall structure circuit theory diagrams of the present utility model; Described key-press module comprises multiple touch key-press, the output of each touch key-press connects the input of a sensor circuit, the output of sensor circuit connects the input of capacitive touch circuit, the output of capacitive touch circuit connects the input of microcontroller, described microcontroller comprises analog-to-digital conversion Acquisition Circuit, and analog-to-digital conversion Acquisition Circuit is electrically connected with capacitive touch circuit by analog-to-digital conversion line.
As shown in Figure 1, described key-press module comprises six touch key-presss, namely button one, button two ..., button six, certain the utility model is not restricted to six touch key-presss, according to specific needs increase or reduce.If key-press module comprises six touch key-presss, because the output of each touch key-press connects the input of a sensor circuit, so also need six road sensor circuits, described sensor circuit gathers finger key information, pass to capacitive touch circuit below, controlled the magnitude of voltage of the analog-to-digital conversion Acquisition Circuit in microcontroller below again by capacitive touch circuit, after analog-to-digital conversion Acquisition Circuit collects different magnitudes of voltage, can tell concrete operations person is which key pressed.
Further, described sensor circuit is by FTC334C touch key-press chip.
As shown in Figure 2, described capacitive touch circuit is made up of FTC334C touch key-press chip capacitive touch circuit of the present utility model, and the input of FTC334C touch key-press chip connects the output of sensor circuit.FTC334C touch key-press chip also connects electric capacity C1, C2, C3, C4 and pull-up resistor, for stabilization, in order to avoid there is false triggering.
Further, described analog-to-digital conversion Acquisition Circuit is made up of FTC334C touch key-press chip.
Preferably, the utility model increases anti-tampering function simultaneously, and described microcontroller also comprises an anti-jamming circuit, and described anti-jamming circuit is general anti-jamming circuit composition, be made up of electric capacity and resistance, particularly utilize the electric capacity of 10uF 25V and the resistance of 1K to reduce electrostatic interference.
Operation principle of the present utility model is as follows: as can be seen from Figure 1, the circuit structure of the many capacitance touch buttons of the utility model single line, comprise induction module (1-6), capacitance touch module 7, analog-to-digital conversion acquisition module 8 and anti-tampering module 9, described 6 induction modules are all connected in capacitance touch module 7, be connected to analog-to-digital conversion acquisition module 8 below, module 8 be furnished with anti-tampering module 9.
The capacitance variation produced when can well sense that finger is pressed by induction module, it is which induction module is triggered that the change of this capacitance can be gone out by capacitance touch module analysis, again corresponding trigger feedback on the magnitude of voltage of analog-to-digital conversion acquisition module, for guaranteeing extraneous interference, anti-tampering module is set in addition.
Carry out clear, complete description by the technical scheme in above embodiment to the utility model, obviously described embodiment is the embodiment of the utility model part, instead of whole embodiments.Based on the embodiment in the utility model, those of ordinary skill in the art are not making the every other embodiment obtained under creative work prerequisite, all belong to the scope of the utility model protection.
Claims (6)
1. a circuit structure for the many capacitance touch buttons of single line, is characterized in that: comprise key-press module, sensor circuit, capacitive touch circuit, microcontroller; Described key-press module comprises multiple touch key-press, the output of each touch key-press connects the input of a sensor circuit, the output of sensor circuit connects the input of capacitive touch circuit, the output of capacitive touch circuit connects the input of microcontroller, described microcontroller comprises analog-to-digital conversion Acquisition Circuit, and analog-to-digital conversion Acquisition Circuit is electrically connected with capacitive touch circuit by analog-to-digital conversion line.
2. the circuit structure of the many capacitance touch buttons of single line according to claim 1, is characterized in that described sensor circuit is made up of FTC334C touch controlled key chip.
3. the circuit structure of the many capacitance touch buttons of single line according to claim 2, is characterized in that: described capacitive touch circuit is made up of FTC334C touch key-press chip, and the input of FTC334C touch key-press chip connects the output of sensor circuit.
4. the circuit structure of the many capacitance touch buttons of single line according to claim 3, is characterized in that: described analog-to-digital conversion Acquisition Circuit is made up of FTC334C touch controlled key chip.
5. the circuit structure of the many capacitance touch buttons of the single line according to any one of claim 1-4, is characterized in that: described microcontroller also comprises an anti-jamming circuit, and described anti-jamming circuit is electrically connected with analog-to-digital conversion Acquisition Circuit.
6. the circuit structure of the many capacitance touch buttons of single line according to claim 5, is characterized in that: described anti-jamming circuit is made up of electric capacity and resistance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520427309.9U CN204578511U (en) | 2015-06-19 | 2015-06-19 | The circuit structure of the many capacitance touch buttons of a kind of single line |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520427309.9U CN204578511U (en) | 2015-06-19 | 2015-06-19 | The circuit structure of the many capacitance touch buttons of a kind of single line |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204578511U true CN204578511U (en) | 2015-08-19 |
Family
ID=53871099
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520427309.9U Active CN204578511U (en) | 2015-06-19 | 2015-06-19 | The circuit structure of the many capacitance touch buttons of a kind of single line |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204578511U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112117148A (en) * | 2020-09-23 | 2020-12-22 | 北京汉德默兹克科技有限公司 | Keyboard and key identification method |
-
2015
- 2015-06-19 CN CN201520427309.9U patent/CN204578511U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112117148A (en) * | 2020-09-23 | 2020-12-22 | 北京汉德默兹克科技有限公司 | Keyboard and key identification method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN202472600U (en) | Display device with electromagnetic touch and capacitive touch | |
| CN204578511U (en) | The circuit structure of the many capacitance touch buttons of a kind of single line | |
| CN204463420U (en) | A kind of telepilot | |
| CN201383138Y (en) | Novel projection-type touch screen utilizing capacitive technology | |
| CN201639564U (en) | Capacitance induction type key | |
| CN204790747U (en) | Can realize electronic equipment of fingerprint detection and frame thereof | |
| CN202889317U (en) | Capacitance type touch key circuit | |
| CN202634587U (en) | Human body induction circuit and visual intercom system formed by the same | |
| CN201805414U (en) | ITO (Indium Tin Oxide) film approach inductive key | |
| CN203278792U (en) | Structure capable of realizing switching function of mechanical key by means of capacitive touch detection chip | |
| CN201708880U (en) | Touch type button visual indoor extension | |
| CN205754267U (en) | A kind of super low-power consumption touch key-press circuit | |
| CN201418069Y (en) | Touch control induction circuit of induction cooker | |
| CN205230008U (en) | Capacitive touch panel's independent button and connection structure of touch -control chip | |
| CN201805415U (en) | Indium tin oxide (ITO) thin-film capacitor touch key | |
| CN201477564U (en) | Double-wire touch control key device | |
| CN205210821U (en) | Hand interaction system device | |
| CN215897699U (en) | Multifunctional switch system | |
| CN203746369U (en) | Segment code type liquid crystal screen and electrical energy meter equipped with same | |
| CN204442330U (en) | A kind of for fire display panel touch key-press circuit | |
| CN201134089Y (en) | Wireless mouse board for hand-writing | |
| CN202004742U (en) | Touch switch circuit | |
| CN204615799U (en) | A kind of matrix form touch switch circuit based on FSR | |
| CN203039771U (en) | A photoelectric mouse cell phone system module | |
| CN204463113U (en) | A kind of multifunction electronic counter |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |