CN202750067U - Touch sensitive button circuit for induction cooker - Google Patents
Touch sensitive button circuit for induction cooker Download PDFInfo
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- CN202750067U CN202750067U CN 201220231417 CN201220231417U CN202750067U CN 202750067 U CN202750067 U CN 202750067U CN 201220231417 CN201220231417 CN 201220231417 CN 201220231417 U CN201220231417 U CN 201220231417U CN 202750067 U CN202750067 U CN 202750067U
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- resistance
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- triode
- button
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Abstract
The utility model relates to a touch sensitive button circuit for an induction cooker. The touch sensitive button circuit comprises a single-chip microcomputer, a triode Q1 and a button sensitive circuit. A PWM interface of the single-chip microcomputer is connected with a base electrode of the triode Q1, a collector electrode of the triode Q1 is connected with a power supply source through a resistor R3 and connected with a signal input terminal of the button sensitive circuit, and a signal output terminal of the button sensitive circuit is connected with an A/D interface of the single-chip microcomputer. The touch sensitive button circuit has the advantages of high anti-interference capability, high stability and low cost.
Description
Technical field
The utility model relates to a kind of touch sensible key circuit, is specifically related to a kind of capacitance touch induced key circuit for electromagnetic oven.
Background technology
Electronic switch is one of core of resistance product, and the button indispensable part that is electronic switch.At present, the touch sensible button has become the indispensable part of household appliances product.Press in the key technology at touch sensible, mainly can be divided at present resistive touch button and capacitive induction button, because the touch key-press of resistance-type need to paste one in equipment surface and touch resistance film, its durability is lower, the advantages such as and the cap-sensor technology has at nonmetal guidance panel and need not perforate processing, water proof anti-soil, and easy to clean, machinery-free switch wearing and tearing and life-span are long.Although the touch-induction-type button has advantages of that traditional mechanical key can't reach, exist also that design cost is high, the relatively poor button that easily causes of antijamming capability is ineffective or produce the shortcoming such as misoperation.
The utility model content
For overcoming the problem of the deficiencies in the prior art and existence, the utility model provides a kind of circuit structure simple, the touch sensible key circuit that antijamming capability is strong, cost is low.
The utility model is achieved through the following technical solutions: a kind of touch sensible key circuit for electromagnetic oven, comprise single-chip microcomputer, triode Q1, key induced circuit, the PWM port of described single-chip microcomputer is connected with the base stage of triode Q1, the collector electrode of triode Q1 is connected with voltage source by resistance R 3, and the collector electrode of triode Q1 also is connected with the signal input part of key induced circuit, and the signal output part of described key induced circuit is connected with the A/D port of single-chip microcomputer.Described key induced circuit comprises the touch sensible button, capacitor C 2, resistance R 1, resistance R 2, diode D1, diode D2; Described resistance R 1 is connected in series with resistance R 2, diode D1 and resistance R 1 are connected in parallel, diode D2 and resistance R 2 are connected in parallel, and the positive pole of diode D1 is connected with the positive pole of diode D2, described touch sensible button is connected with the positive pole of diode D1, diode D2, and is connected with resistance R 1, resistance R 2 interconnective ends; One end of the negative pole of diode D1 and resistance R 1 is as the signal input part of key induced circuit, one end of the negative pole of diode D2 and resistance R 2 is as the signal output part of key induced circuit, described capacitor C 2 one ends are connected other end ground connection with this signal output part.
The utility model has an antijamming capability strong compared with the prior art, high, the low cost and other advantages of stability.
Description of drawings
Fig. 1 is circuit theory of the present utility model.
Embodiment
Understanding for the ease of those skilled in the art is described in further detail the utility model below in conjunction with the drawings and specific embodiments.
As shown in Figure 1, a kind of touch sensible key circuit for electromagnetic oven, comprise single-chip microcomputer, triode Q1, key induced circuit, the PWM port of described single-chip microcomputer is connected with the base stage of triode Q1, the collector electrode of triode Q1 is connected with voltage source by resistance R 3, and the collector electrode of triode Q1 also is connected with the signal input part of key induced circuit, and the signal output part of described key induced circuit is connected with the A/D port of single-chip microcomputer.
Described key induced circuit comprises the touch sensible button, capacitor C 2, resistance R 1, resistance R 2, diode D1, diode D2; Described resistance R 1 is connected in series with resistance R 2, diode D1 and resistance R 1 are connected in parallel, diode D2 and resistance R 2 are connected in parallel, and the positive pole of diode D1 is connected with the positive pole of diode D2, described touch sensible button is connected with the positive pole of diode D1, diode D2, and is connected with resistance R 1, resistance R 2 interconnective ends; One end of the negative pole of diode D1 and resistance R 1 is as the signal input part of key induced circuit, one end of the negative pole of diode D2 and resistance R 2 is as the signal output part of key induced circuit, described capacitor C 2 one ends are connected other end ground connection with this signal output part.
Above-described embodiment is better implementation of the present utility model, is not to be to restriction of the present utility model, and under the prerequisite that does not break away from inventive concept of the present utility model, any apparent replacement is all within protection range of the present utility model.
Claims (1)
1. touch sensible key circuit that is used for electromagnetic oven, comprise single-chip microcomputer, triode Q1, key induced circuit, it is characterized in that: the PWM port of described single-chip microcomputer is connected with the base stage of triode Q1, the collector electrode of triode Q1 is connected with voltage source by resistance R 3, and the collector electrode of triode Q1 also is connected with the signal input part of key induced circuit, and the signal output part of described key induced circuit is connected with the A/D port of single-chip microcomputer; Described key induced circuit comprises the touch sensible button, capacitor C 2, resistance R 1, resistance R 2, diode D1, diode D2; Described resistance R 1 is connected in series with resistance R 2, diode D1 and resistance R 1 are connected in parallel, diode D2 and resistance R 2 are connected in parallel, and the positive pole of diode D1 is connected with the positive pole of diode D2, described touch sensible button is connected with the positive pole of diode D1, diode D2, and is connected with resistance R 1, resistance R 2 interconnective ends; One end of the negative pole of diode D1 and resistance R 1 is as the signal input part of key induced circuit, one end of the negative pole of diode D2 and resistance R 2 is as the signal output part of key induced circuit, described capacitor C 2 one ends are connected other end ground connection with this signal output part.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220231417 CN202750067U (en) | 2012-05-22 | 2012-05-22 | Touch sensitive button circuit for induction cooker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220231417 CN202750067U (en) | 2012-05-22 | 2012-05-22 | Touch sensitive button circuit for induction cooker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202750067U true CN202750067U (en) | 2013-02-20 |
Family
ID=47709416
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220231417 Expired - Fee Related CN202750067U (en) | 2012-05-22 | 2012-05-22 | Touch sensitive button circuit for induction cooker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202750067U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108882420A (en) * | 2017-05-10 | 2018-11-23 | 苏州聚元微电子股份有限公司 | A method of power frequency zero passage area is determined using electromagnetic oven touch controlled key noise |
-
2012
- 2012-05-22 CN CN 201220231417 patent/CN202750067U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108882420A (en) * | 2017-05-10 | 2018-11-23 | 苏州聚元微电子股份有限公司 | A method of power frequency zero passage area is determined using electromagnetic oven touch controlled key noise |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130220 Termination date: 20130522 |