CN204031559U - A kind of mini light night control circuit - Google Patents
A kind of mini light night control circuit Download PDFInfo
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- CN204031559U CN204031559U CN201420486211.6U CN201420486211U CN204031559U CN 204031559 U CN204031559 U CN 204031559U CN 201420486211 U CN201420486211 U CN 201420486211U CN 204031559 U CN204031559 U CN 204031559U
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- operational amplifier
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/40—Control techniques providing energy savings, e.g. smart controller or presence detection
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- Circuit Arrangement For Electric Light Sources In General (AREA)
Abstract
The utility model discloses a kind of mini light night control circuit, first this circuit detects current environment by light sensor is daytime or evening, whether detected by infrared sensor has human body to pass through simultaneously, be evening when testing result and have human body through out-of-date, the pwm signal that controller output duty cycle increases gradually drives brightness regulating circuit, brightness regulating circuit controls LED and lights gradually, in like manner, when infrared sensor induction exists less than human body, the pwm signal that controller output duty cycle reduces gradually drives brightness regulating circuit, brightness regulating circuit controls LED and extinguishes gradually.The utility model is lighted gradually to LED and the control of extinguishing contributes to the adaptation of eyes to surrounding environment, alleviates the stimulation of light to eyes, is beneficial to the secondary sleep of the descendant that gets up night.
Description
Technical field
The utility model relates to lighting technical field, particularly relates to a kind of mini light night control circuit.
Background technology
Mini light night light is soft, in the dark, plays the effect of guiding illumination.People wake up and do work midnight, and a mini light night brings very large convenience to us.But it is not enough as follows that traditional mini light night goes back ubiquity at present: after induced electrified, mini light night will light instantaneously, and at night WA, everybody is in half asleep often, dark serious to eye irritation to bright instantaneous variation, affects the secondary sleep of people.
Utility model content
For above-mentioned technical problem, the purpose of this utility model is to provide a kind of mini light night control circuit, it can have people evening through out-of-date perceiving, control mini light night slowly light and extinguish, contribute to the adaptation of eyes to surrounding environment, alleviate the stimulation of light to eyes, be beneficial to the secondary sleep of the descendant that gets up night.
For reaching this object, the utility model by the following technical solutions:
A kind of mini light night control circuit, it comprises: light sensor, infrared sensor, controller and brightness regulating circuit; The output of described light sensor and infrared sensor and controller are electrically connected, and described brightness regulating circuit input and controller are electrically connected; Described degree regulating circuit comprises the first resistance, the second resistance, the 3rd resistance, the 4th resistance, the first electric capacity, the second electric capacity, ammeter, voltmeter, operational amplifier and N-channel MOS field effect transistor; Wherein, described first resistance is connected to pwm signal output and in the same way between the input of operational amplifier of controller, second resistance and the first electric capacity are all connected in the same way between input and ground of operational amplifier in parallel, two fixing feet of the 3rd resistance connect external power supply and ground respectively, the inverting input of the movable leg concatenation operation amplifier of the 3rd resistance, the 4th resistance is connected between the inverting input of operational amplifier and ground; The power end of operational amplifier connects external power supply, earth terminal ground connection, output connects the grid of N-channel MOS field effect transistor, the drain electrode of N-channel MOS field effect transistor connects external power supply, second electric capacity is connected between the inverting input of operational amplifier and the source electrode of N-channel MOS field effect transistor, second electric capacity two ends are connected in parallel LED, and ammeter is connected in series between lED lamp and the reverse input end of operational amplifier, and voltmeter is connected in the two ends of LED in parallel.
First the mini light night control circuit that the utility model proposes detects current environment by light sensor is daytime or evening, whether detected by infrared sensor has human body to pass through simultaneously, be evening when testing result and have human body through out-of-date, pulse-width modulation (PWM) signal that controller output duty cycle increases gradually drives brightness regulating circuit, brightness regulating circuit controls LED and lights gradually, in like manner, when infrared sensor induction exists less than human body, the pwm signal that controller output duty cycle reduces gradually drives brightness regulating circuit, brightness regulating circuit controls LED and extinguishes gradually.The utility model is lighted gradually to LED and the control of extinguishing contributes to the adaptation of eyes to surrounding environment, alleviates the stimulation of light to eyes, is beneficial to the secondary sleep of people.
Accompanying drawing explanation
Fig. 1 is the structural representation of the mini light night control circuit that the utility model embodiment provides;
Fig. 2 is the structure chart of the brightness regulating circuit that the utility model embodiment provides.
Embodiment
Below in conjunction with drawings and Examples, the utility model is described in further detail.Be understandable that, specific embodiment described herein only for explaining the utility model, but not to restriction of the present utility model.It also should be noted that, for convenience of description, illustrate only the part relevant to the utility model in accompanying drawing but not full content.
Please refer to shown in Fig. 1, Fig. 1 is the structural representation of the mini light night control circuit that the utility model embodiment provides.In the present embodiment, mini light night control circuit specifically comprises: light sensor 101, infrared sensor 103, controller 102 and brightness regulating circuit 104.Output and the controller 102 of described light sensor 101 and infrared sensor 103 are electrically connected.Described brightness regulating circuit 104 input and controller 102 are electrically connected.
Described light sensor 101 is for the intensity signal of perception current environment, and detecting current is daytime or evening.Whether described infrared sensor 103 has human body to pass through for detecting.Described controller 102 is for controlling the action of all elements in mini light night control circuit, and the pwm signal that output duty cycle is adjustable drives brightness regulating circuit 104.Described brightness regulating circuit 104, for the adjustable pwm signal of the duty ratio that exports according to controller 102, controls LED and lights gradually or extinguish.Concrete, when the testing result of light sensor 101 and infrared sensor 103 is: current time is evening and has human body through out-of-date, the pwm signal that controller 102 output duty cycle increases gradually drives brightness regulating circuit 104, and brightness regulating circuit 104 controls LED and lights gradually; Human body, not at the induction range of infrared sensor 103, is responded to when existing less than human body, time delay certain hour, and the pwm signal that output duty cycle reduces by controller 102 gradually drives brightness regulating circuit 104, and brightness regulating circuit 104 controls LED and extinguishes gradually.It should be noted that, PWM modulation signal increases gradually and the amplitude that reduces can be arranged flexibly by controller 102.
PIC single chip microcomputer 16F877A module is selected in controller 102 described in the present embodiment.As shown in Figure 2, described brightness regulating circuit 104 comprises the first resistance R21, the second resistance R22, the 3rd resistance R23, the 4th resistance R24, the first electric capacity C21, the second electric capacity C22, ammeter J21, voltmeter J22, operational amplifier U21A and N-channel MOS field effect transistor Q21.Described first resistance R21 is connected to pwm signal output and in the same way between the input of operational amplifier U21A of controller 102, second resistance R22 and the first electric capacity C21 is all connected in the same way between input and ground of operational amplifier U21A in parallel, two fixing feet of the 3rd resistance R23 connect 12V external power supply and ground respectively, the inverting input of the movable leg concatenation operation amplifier U21A of the 3rd resistance R23, between the inverting input that the 4th resistance R24 is connected to operational amplifier U21A and ground; The power end of operational amplifier U21A connects 12V external power supply, earth terminal ground connection, output connects the grid of N-channel MOS field effect transistor Q21, the drain electrode of N-channel MOS field effect transistor Q21 connects 12V external power supply, second electric capacity C22 is connected between the inverting input of operational amplifier U21A and the source electrode of N-channel MOS field effect transistor Q21, second electric capacity C22 two ends are connected in parallel LED D21, ammeter J21 is connected in series between the reverse input end of LED D21 and operational amplifier U21A, and voltmeter J22 is connected in the two ends of LED D21 in parallel.
Wherein, the first resistance R21, the second resistance R22, the first electric capacity C21 form filter circuit and carry out low-pass filtering to pwm signal.Operational amplifier U21A, N-channel MOS field effect transistor Q21, the 4th resistance R24 form constant-current source circuit, ensure LED D21 constant current hold, the electric current that LED D21 need of work is constant.Second electric capacity C22 is used for smoothing to filtered remaining ripple.3rd resistance R23 is for adjusting the constant current value under fixed voltage.Ammeter J21 is for measuring LED D21 electric current.Voltmeter J22 is for measuring LED D21 voltage.During work, when pwm signal is high level, field effect transistor Q21 conducting, LED D21 lights.When pwm signal is low level, field effect transistor Q21 turns off, and LED D21 closes and goes out.When pwm signal export fast, the waveform of high frequency time, LED D21 by occurring fast, the light on and off of high frequency, now human eye differentiates to go out the light on and off of lamp, just the brightness difference of the pwm signal of different duty LED D21 that human eye is experienced.Pwm signal duty ratio is larger, and human eye perceives LED D21 is brighter, and pwm signal duty ratio is less, and human eye perceives LED D21 is darker.As long as PIC single chip microcomputer 16F877A module controls the pwm signal exporting different duty in the present embodiment, driving brightness regulating circuit 104 just can complete the brightness regulation to LED D21, realizes slowly lighting and extinguishing of LED D21.
In actual applications, when elected power is the LED D21 of 1W, the specification of the first resistance R21, the second resistance R22, the 3rd resistance R23, the 4th resistance R24, the first electric capacity C21, the second electric capacity C22 corresponding selection is respectively 20K Ω, 20K Ω, 10K Ω, 4.1K Ω, 10UF, 470UF, and the model that operational amplifier U21A selects is LM358; The model that N-channel MOS field effect transistor Q21 selects is 5N60C.Separately, the quantity of the LED D21 in mini light night control circuit is unrestricted, can delete flexibly as required.
The technical solution of the utility model can have people evening through out-of-date perceiving, and controls mini light night and slowly lights and extinguish, contribute to the adaptation of eyes to surrounding environment, alleviate the stimulation of light to eyes, is beneficial to the secondary sleep of the descendant that gets up night.
Note, above are only preferred embodiment of the present utility model and institute's application technology principle.Skilled person in the art will appreciate that the utility model is not limited to specific embodiment described here, various obvious change can be carried out for a person skilled in the art, readjust and substitute and protection range of the present utility model can not be departed from.Therefore, although be described in further detail the utility model by above embodiment, but the utility model is not limited only to above embodiment, when not departing from the utility model design, can also comprise other Equivalent embodiments more, and scope of the present utility model is determined by appended right.
Claims (1)
1. a mini light night control circuit, is characterized in that, comprising: light sensor, infrared sensor, controller and brightness regulating circuit; The output of described light sensor and infrared sensor and controller are electrically connected, and described brightness regulating circuit input and controller are electrically connected; Described degree regulating circuit comprises the first resistance, the second resistance, the 3rd resistance, the 4th resistance, the first electric capacity, the second electric capacity, ammeter, voltmeter, operational amplifier and N-channel MOS field effect transistor; Wherein, described first resistance is connected to pwm signal output and in the same way between the input of operational amplifier of controller, second resistance and the first electric capacity are all connected in the same way between input and ground of operational amplifier in parallel, two fixing feet of the 3rd resistance connect external power supply and ground respectively, the inverting input of the movable leg concatenation operation amplifier of the 3rd resistance, the 4th resistance is connected between the inverting input of operational amplifier and ground; The power end of described operational amplifier connects external power supply, earth terminal ground connection, output connects the grid of N-channel MOS field effect transistor, the drain electrode of N-channel MOS field effect transistor connects external power supply, second electric capacity is connected between the inverting input of operational amplifier and the source electrode of N-channel MOS field effect transistor, second electric capacity two ends are connected in parallel LED, and ammeter is connected in series between lED lamp and the reverse input end of operational amplifier, and voltmeter is connected in the two ends of LED in parallel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420486211.6U CN204031559U (en) | 2014-08-26 | 2014-08-26 | A kind of mini light night control circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420486211.6U CN204031559U (en) | 2014-08-26 | 2014-08-26 | A kind of mini light night control circuit |
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| Publication Number | Publication Date |
|---|---|
| CN204031559U true CN204031559U (en) | 2014-12-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420486211.6U Expired - Fee Related CN204031559U (en) | 2014-08-26 | 2014-08-26 | A kind of mini light night control circuit |
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| CN (1) | CN204031559U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105338711A (en) * | 2015-11-30 | 2016-02-17 | 广东酷柏光电股份有限公司 | LED lamp with variable brightness |
| CN107436622A (en) * | 2016-05-27 | 2017-12-05 | 富泰华工业（深圳）有限公司 | A kind of electronic installation and night-light control method with night-light function |
| CN107608274A (en) * | 2017-10-23 | 2018-01-19 | 江西爱越智能科技有限公司 | A kind of wisdom hotel guest room controls Internet of things system |
| CN108174479A (en) * | 2017-12-25 | 2018-06-15 | 嘉兴美斯克电气科技有限公司 | A kind of timing induction LED control system |
-
2014
- 2014-08-26 CN CN201420486211.6U patent/CN204031559U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105338711A (en) * | 2015-11-30 | 2016-02-17 | 广东酷柏光电股份有限公司 | LED lamp with variable brightness |
| CN107436622A (en) * | 2016-05-27 | 2017-12-05 | 富泰华工业（深圳）有限公司 | A kind of electronic installation and night-light control method with night-light function |
| CN107608274A (en) * | 2017-10-23 | 2018-01-19 | 江西爱越智能科技有限公司 | A kind of wisdom hotel guest room controls Internet of things system |
| CN108174479A (en) * | 2017-12-25 | 2018-06-15 | 嘉兴美斯克电气科技有限公司 | A kind of timing induction LED control system |
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| 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 |
Granted publication date: 20141217 Termination date: 20150826 |
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| EXPY | Termination of patent right or utility model |