CN203299576U - Temperature control display and key driving circuit - Google Patents
Temperature control display and key driving circuit Download PDFInfo
- Publication number
- CN203299576U CN203299576U CN2013202992676U CN201320299267U CN203299576U CN 203299576 U CN203299576 U CN 203299576U CN 2013202992676 U CN2013202992676 U CN 2013202992676U CN 201320299267 U CN201320299267 U CN 201320299267U CN 203299576 U CN203299576 U CN 203299576U
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- driving circuit
- triodes
- display device
- master control
- key
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Abstract
The utility model discloses a temperature control display and key driving circuit comprising a power circuit and a driving circuit. The driving circuit comprises a main control device, a display unit, a key device and four triodes, wherein collectors of the four triodes are electrically connected with the power circuit, emitters of the four triodes are electrically connected with an input end of the display device, bases of the four triodes are electrically connected with a key seat of the key device and are electrically connected with the main control device, and an output end of the display device is electrically connected with the main control device. The temperature control display and key driving circuit further comprises a current limiting resistor and a common-end resistor, wherein the current limiting resistor is connected between the output end of the display device and the main control device, and the common-end resistor is connected between the main control device and a common end of the key device.
Description
Technical field
The utility model relates to a kind of driving circuit, is specifically related to a kind of temperature control demonstration, button driving circuit.
Background technology
In prior art, the driving circuit of temperature controller, the input of display device and key device is separately used, and causes mouthful waste of line resource, the wiring complexity, the power consumption of master control set is large, and encapsulation volume is large, and flickering is arranged during demonstration.
The utility model content
For solving the problems of the technologies described above, the purpose of this utility model is to provide a kind of temperature control demonstration, button driving circuit, the input of display device and key device is multiplexing, effectively save a mouthful line resource, the mode of connection is simple simultaneously, the power consumption of master control set is little, and encapsulation volume is little, flicker free sense during demonstration.
for achieving the above object, the technical solution of the utility model is as follows: a kind of temperature control shows, the button driving circuit, comprise power circuit and driving circuit, described driving circuit comprises master control set, display device, key device and four triodes, the collector of described four triodes and the electrical connection of described power circuit, the emitter of described four triodes is electrically connected with the input end of described display device respectively, the base stage of described four triodes is electrically connected with the key base of described key device respectively, and the base stage of described four triodes is electrically connected with described master control set respectively, the output terminal of described display device and the electrical connection of described master control set,
Also comprise current-limiting resistance, described current-limiting resistance is connected between the output terminal and described master control set of described display device;
Also comprise common port resistance, described common port resistance is connected between the common port of described master control set and described key device.
Preferably, described master control set is single-chip microcomputer.
Preferably, described display device is four segment encode LED.
Adopt the beneficial effect of the technical program to be: the input of display device and key device is multiplexing, effectively saves a mouthful line resource, and the mode of connection is simple simultaneously, and the power consumption of master control set is little, and encapsulation volume is little, flicker free sense during demonstration.
The accompanying drawing explanation
In order to be illustrated more clearly in the technical scheme in the utility model embodiment technology, below will the accompanying drawing of required use in the embodiment technical description be briefly described, apparently, accompanying drawing in the following describes is only embodiment more of the present utility model, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is connecting structure for electrical equipment schematic diagram of the present utility model.
Fig. 2 is circuit construction of electric power schematic diagram of the present utility model.
Numeral and the represented corresponding component title of letter in figure:
1. power circuit 2. driving circuit 3. master control set 4. display device 5. key device 6-9. triode 10. current-limiting resistance 11. common port resistance.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the utility model embodiment is clearly and completely described, obviously, described embodiment is only the utility model part embodiment, rather than whole embodiment.Based on the embodiment in the utility model, those of ordinary skills are not making under the creative work prerequisite the every other embodiment that obtains, and all belong to the scope of the utility model protection.
As shown in Figure 1, a kind of temperature control demonstration, button driving circuit, comprise power circuit 1 and driving circuit 2, driving circuit 2 comprises master control set 3, display device 4, key device 5 and triode 6-9, the collector of triode 6-9 and power circuit 1 electrical connection, the emitter of triode 6-9 is electrically connected with the input end of display device 4 respectively, the base stage of triode 6-9 is electrically connected with the key base of key device 5 respectively, and the base stage of triode 6-9 is electrically connected with master control set 3 respectively, the output terminal of display device 4 and master control set 3 electrical connections;
Also comprise current-limiting resistance 10, current-limiting resistance 10 is connected between the output terminal and master control set 3 of display device 4;
Also comprise common port resistance 11, common port resistance 11 is connected between the common port of master control set 3 and key device 5.
In the present embodiment, master control set 3 is single-chip microcomputer.Display device 4 is four segment encode LED.Single-chip microcomputer drives the position route selection of four segment encode LED, these four inputs that the mouth line is also key device 5 simultaneously by triode 6-9; The data line of four segment encode LED is connected to single-chip microcomputer by current-limiting resistance 10, and single-chip microcomputer is connected to the common port of key device 5 by a common port resistance 11.
When work, the base stage of triode 6-9, button common port turn enable; While needing to show, open in turn triode 6-9, the data port of four segment encode LED is sent into corresponding demonstration data.During the scanning button, the Micro Controller Unit (MCU) driving signal carrys out the common port to key device 5, and single-chip microcomputer receives key value.
The single-chip microcomputer of 5V power supply only drives the base stage of triode, and the energy of four segment encode LED is supplied with by the collector that is connected to power circuit 1, the power consumption parts are by power circuit 1 power supply rather than 5V like this, make the power consumption of step-down chip greatly reduce, make the IC of the less encapsulation of selection become feasible, make temperature rise controlled.Triode works in the emitter follower mode, and it is also stable making the voltage that arrives four segment encode LED sheet choosings, shows the flicker free sense.
As shown in Figure 2, power circuit 1 is inputted by 220V AC, by transformer pressure-reducing, and full-wave rectification, filtering, produce pulsating direct current VNR on C2; VNR does not need too high stability, because its load is relay and linear voltage decreasing device IC3, these two devices can bear very large input fluctuation.
Adopt the beneficial effect of the technical program to be: the input of display device and key device is multiplexing, effectively saves a mouthful line resource, and the mode of connection is simple simultaneously, and the power consumption of master control set is little, and encapsulation volume is little, flicker free sense during demonstration.
To the above-mentioned explanation of the disclosed embodiments, make professional and technical personnel in the field can realize or use the utility model.Multiple modification to these embodiment will be apparent for those skilled in the art, and General Principle as defined herein can be in the situation that do not break away from spirit or scope of the present utility model, realization in other embodiments.Therefore, the utility model will can not be restricted to these embodiment shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.
Claims (3)
1. a temperature control shows, the button driving circuit, it is characterized in that, comprise power circuit and driving circuit, described driving circuit comprises master control set, display device, key device and four triodes, the collector of described four triodes and the electrical connection of described power circuit, the emitter of described four triodes is electrically connected with the input end of described display device respectively, the base stage of described four triodes is electrically connected with the key base of described key device respectively, and the base stage of described four triodes is electrically connected with described master control set respectively, the output terminal of described display device and the electrical connection of described master control set,
Also comprise current-limiting resistance, described current-limiting resistance is connected between the output terminal and described master control set of described display device;
Also comprise common port resistance, described common port resistance is connected between the common port of described master control set and described key device.
2. a kind of temperature control demonstration according to claim 1, button driving circuit, is characterized in that, described master control set is single-chip microcomputer.
3. a kind of temperature control demonstration according to claim 1, button driving circuit, is characterized in that, described display device is four segment encode LED.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013202992676U CN203299576U (en) | 2013-05-29 | 2013-05-29 | Temperature control display and key driving circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013202992676U CN203299576U (en) | 2013-05-29 | 2013-05-29 | Temperature control display and key driving circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203299576U true CN203299576U (en) | 2013-11-20 |
Family
ID=49575575
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013202992676U Expired - Fee Related CN203299576U (en) | 2013-05-29 | 2013-05-29 | Temperature control display and key driving circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203299576U (en) |
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2013
- 2013-05-29 CN CN2013202992676U patent/CN203299576U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20131120 Termination date: 20200529 |