CN110113842A - Environment photoinduction controls lamp switch circuit - Google Patents
Environment photoinduction controls lamp switch circuit Download PDFInfo
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- CN110113842A CN110113842A CN201910425336.5A CN201910425336A CN110113842A CN 110113842 A CN110113842 A CN 110113842A CN 201910425336 A CN201910425336 A CN 201910425336A CN 110113842 A CN110113842 A CN 110113842A
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- 239000004065 semiconductor Substances 0.000 claims abstract description 24
- 238000000034 method Methods 0.000 claims abstract description 7
- 230000008569 process Effects 0.000 claims abstract description 6
- 230000007613 environmental effect Effects 0.000 claims abstract description 4
- 239000003990 capacitor Substances 0.000 claims description 55
- 239000003381 stabilizer Substances 0.000 claims description 12
- 230000005611 electricity Effects 0.000 claims description 10
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- 230000006837 decompression Effects 0.000 claims description 6
- 238000001514 detection method Methods 0.000 claims description 4
- 208000027418 Wounds and injury Diseases 0.000 claims description 3
- 208000014674 injury Diseases 0.000 claims description 3
- 230000006641 stabilisation Effects 0.000 claims description 3
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- 241001465382 Physalis alkekengi Species 0.000 abstract description 14
- 230000004069 differentiation Effects 0.000 abstract description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 238000005868 electrolysis reaction Methods 0.000 description 2
- 230000006870 function Effects 0.000 description 2
- 239000000523 sample Substances 0.000 description 2
- BLRPTPMANUNPDV-UHFFFAOYSA-N Silane Chemical compound [SiH4] BLRPTPMANUNPDV-UHFFFAOYSA-N 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B47/00—Circuit arrangements for operating light sources in general, i.e. where the type of light source is not relevant
- H05B47/10—Controlling the light source
- H05B47/105—Controlling the light source in response to determined parameters
- H05B47/11—Controlling the light source in response to determined parameters by determining the brightness or colour temperature of ambient light
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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
- Y02B20/30—Semiconductor lamps, e.g. solid state lamps [SSL] light emitting diodes [LED] or organic LED [OLED]
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- Circuit Arrangement For Electric Light Sources In General (AREA)
Abstract
The object of the present invention is to provide a kind of environment photoinduction to control lamp switch circuit, the application exports the metal-oxide-semiconductor Q1 quick on-off on PWM waveform driving lamps and lanterns output loop by 6 foot of PA3 of single-chip microcontroller U2 internal processes control single chip computer U2, the interrupted output of lamps and lanterns light is realized, to make differentiation with extraneous stable environment light.Single-chip microcontroller U2 detects the variation of ambient by external photodiode D5, if light is interrupted, then it is shown to be the light of lamps and lanterns itself sending, single-chip microcontroller U2 is failure to actuate, if detecting that light is continuous, it is then shown to be external environmental light variation, single-chip microcontroller U2 executes corresponding movement according to the program set.
Description
Technical field
The present invention relates to a kind of environment photoinduction to control lamp switch circuit.
Background technique
With intelligentized universal, nobody, which holds the lighting apparatus kept and has been increasingly used in daily life and work, works as
In.Lamps and lanterns itself are to be automatically switched according to the variation of local environment, to reach energy-saving and environment-friendly purpose.However, due to lamps and lanterns knot
Structure limitation, it has to be placed in light-inductive probe in same cavity with LED, thus one problem of band is exactly, and light-inductive is visited
Environment light and the LED light issued can not be made effective differentiation by head.
Summary of the invention
It is an object of the present invention to provide a kind of environment photoinduction to control lamp switch circuit.
According to an aspect of the invention, there is provided a kind of environment photoinduction controls lamp switch circuit, which includes:
Insure resistance F1, rectifier bridge D1, wherein the L line of alternating current connects one end of the insurance resistance F1, the insurance electricity
The other end of resistance F1 connects an input terminal of the rectifier bridge D1, the N line of alternating current connect the rectifier bridge D1 another is defeated
Enter end；
Resistance R2, resistance R3, power supply chip U1 and capacitor C4, wherein the positive output end of the rectifier bridge D1 connects institute
One end of resistance R2 is stated, the other end of the resistance R2 connects one end of the resistance R3, the other end connection of the resistance R3
To one end of the 4 foot VCC and capacitor C4 of the power supply chip U1, the other end of the capacitor C4 is connected to the cathode of rectifier bridge D1
The 8 foot GND at end and the power supply chip U1；
Diode D2, electrolytic capacitor C1, resistance R1, inductance T1, metal-oxide-semiconductor Q1, capacitor C2, resistance R8, wherein the rectification
The one end of the positive output end of bridge D1 respectively with the cathode of the diode D2, the anode of electrolytic capacitor C1, resistance R1 is connected to
Together as the cathode output end of power supply, the anode output of the power supply to link together connects the anode of load LED；Described two
The anode of pole pipe D2 connects one end of the inductance T1 and 5 feet and 6 feet of the power supply chip U1；The other end of the inductance T1
It is separately connected the source electrode of the cathode of the electrolytic capacitor C1, the other end of resistance R1 and metal-oxide-semiconductor Q1；The drain electrode of the metal-oxide-semiconductor Q1
As the cathode output end of power supply, the cathode of the load LED is connected；The source electrode of one end connection metal-oxide-semiconductor Q1 of the capacitor C2,
The other end of the capacitor C2 is connected to the ground GND；3 feet of the power supply chip U1 connect one end of the resistance R8, the electricity
Hinder the other end connection ground GND of R8；
Resistance R4, triode Q3, resistance R7, single-chip microcontroller U2, voltage-stabiliser tube D4, diode D3, three terminal regulator chip Q2,
In, one end of the resistance R4 is connected to the cathode output end of the rectifier bridge D1, and the other end of the resistance R4 is connected to three
The collector of pole pipe Q3 and one end of resistance R7, the other end of the resistance R7 are connected to the 8 foot GND of single-chip microcontroller U2；Triode
The base stage of Q3 is connected to the cathode of voltage-stabiliser tube D4, and the anode of the voltage-stabiliser tube D4 is connected to the 8 foot GND of single-chip microcontroller U2；Described three
The emitter of pole pipe Q3 is connected to the anode of diode D3, and the anode of the diode D3 is connected to one end and three ends of capacitor C3
3 foot of input terminal of voltage regulator chip Q2, the other end of the capacitor C3 are connected to the 8 foot GND of the single-chip microcontroller U2；Three end
The 1 foot GND of voltage regulator chip Q2 is connected to the 8 foot GND of the single-chip microcontroller U2；The output end 2 of the three terminal regulator chip Q2
Foot is connected to one end of capacitor C5 and the 8 foot GND of 1 the foot VDD, the single-chip microcontroller U2 of the single-chip microcontroller U2 are connected to the electrolysis
The cathode of capacitor C1；
Resistance R5, resistance R6, photodiode D5, wherein 1 foot of the single-chip microcontroller U2 connects VDD is connected to resistance R5 one
End, the other end of the resistance R5 are connected to the anode of the 7 foot PA4 and photodiode D5 of single-chip microcontroller U2, photodiode D5
Cathode be connected to the 8 foot GND of single-chip microcontroller U2；The 6 foot PA3 of single-chip microcontroller U2 are connected to one end of the resistance R6, the resistance
The other end of R6 is connected to the grid of metal-oxide-semiconductor Q1.
Further, in foregoing circuit, the direct current exported from the rectifier bridge D1 passes through the resistance R2, resistance R3
Low-voltage direct is generated after current limliting decompression, then pure low-voltage direct is generated by capacitor C4 filtering and supplies electricity to the power supply chip U1 confession
Electricity.
Further, in foregoing circuit, 5 feet and 6 feet of the power supply chip U1 are identical, 5 feet of the power supply chip U1
With 6 feet collectively as one end of first switch, the other end of 3 feet of the power supply chip as the first switch, described
Between the both ends of one switch inside the power supply chip U1 high-speed switch, direct current after making rectification it is interrupted through overload
LED and inductance T1, power supply chip U1 adjust the PWM waveform of output by the voltage of detection resistance R8.
Further, in foregoing circuit, interrupted direct current is filtered into pure direct current and supplied by the electrolytic capacitor C1
The load LED operation uses, and the resistance R1 is fictitious load, when loading LED open circuit, bleeds off on the electrolytic capacitor C1
Voltage, in order to avoid generate dangerous；The capacitor C2 is for being isolated between the both ends of the first switch in the power supply chip U1
Peak voltage when portion's high-speed switch is to protect device injury-free.
Further, in foregoing circuit, the high voltage direct current after rectifier bridge D1 is supplied three after decompression by the resistance R4 and R7
Pole pipe Q3, triode Q3 generate steady dc voltage by the pressure stabilization function of voltage-stabiliser tube D4, pass through three terminal regulator chip Q2
3 foot input terminals voltage input, three terminal regulator chip Q2 2 foot of output end generate a steady dc voltage it is defeated
Out, it is used using supply single-chip microcontroller U2 after capacitor C5 filtering.
Further, in foregoing circuit, after the photodiode D5 experiences external environment light intensity, photodiode
D5 conducting, the 7 foot PA4 voltages of single-chip microcontroller U2 are pulled low, and the 6 foot PA3 voltages of single-chip microcontroller U2 are lower, and are turned off metal-oxide-semiconductor Q1, are then born
LED is carried to extinguish；
After photodiode D5, which experiences external environmental light, to die down, the 6 foot PA3 control output PWM waveform of single-chip microcontroller U2,
Make metal-oxide-semiconductor Q1 Discontinuous Conduction, then loads LED and discontinuously light.
Further, in foregoing circuit, the period of the 6 foot PA3 output PWM waveform of the single-chip microcontroller U2 is 10mS.
Compared with prior art, the application exports PWM by the PA36 foot of single-chip microcontroller U2 internal processes control single chip computer U2
Metal-oxide-semiconductor Q1 quick on-off on drive waveform lamps and lanterns output loop realizes the interrupted output of lamps and lanterns light, to stablize with the external world
Environment light make differentiation.
In addition, single-chip microcontroller U2 detects the variation of ambient by external photodiode D5, if light is interrupted
, then it is shown to be the light of lamps and lanterns itself sending, single-chip microcontroller U2 is failure to actuate, if detecting that light is continuously, to be shown to be outer
The variation of boundary's environment light, single-chip microcontroller U2 execute corresponding movement according to the program set.
Detailed description of the invention
By reading a detailed description of non-restrictive embodiments in the light of the attached drawings below, of the invention other
Feature, objects and advantages will become more apparent upon:
Fig. 1 shows the environment photoinduction control lamp switch circuit diagram of one embodiment of the invention.
The same or similar appended drawing reference represents the same or similar component in attached drawing.
Specific embodiment
Present invention is further described in detail with reference to the accompanying drawing.
As shown in Figure 1, the present invention provides a kind of environment photoinduction control lamp switch circuit, comprising:
Insure resistance F1, rectifier bridge D1, wherein the L line of alternating current connects one end of the insurance resistance F1, the insurance electricity
The other end of resistance F1 connects an input terminal of the rectifier bridge D1, the N line of alternating current connect the rectifier bridge D1 another is defeated
Enter end；
Here, insurance resistance F1 shields, short-circuit risks are prevented, alternating current is converted to by rectifier bridge D1
Direct current.
Resistance R2, resistance R3, power supply chip U1 and capacitor C4, wherein the positive output end of the rectifier bridge D1 connects institute
One end of resistance R2 is stated, the other end of the resistance R2 connects one end of the resistance R3, the other end connection of the resistance R3
To one end of the 4 foot VCC and capacitor C4 of the power supply chip U1, the other end of the capacitor C4 is connected to the cathode of rectifier bridge D1
The 8 foot GND at end and the power supply chip U1；
Preferably, the direct current exported from the rectifier bridge D1, by being generated after the resistance R2, the decompression of resistance R3 current limliting
Low-voltage direct, then more pure low-voltage direct is generated by capacitor C4 filtering and supplies electricity to the power supply chip U1 power supply, maintain electricity
Source chip U1 is worked normally；
The power supply chip U1 can be using the chip of the model SD6702S of the micro- company's production of Silan；
Diode D2, electrolytic capacitor C1, resistance R1, inductance T1, metal-oxide-semiconductor Q1, capacitor C2, resistance R8, wherein the rectification
The one end of the positive output end of bridge D1 respectively with the cathode of the diode D2, the anode of electrolytic capacitor C1, resistance R1 is connected to
Together as the cathode output end of power supply, the anode output of the power supply to link together connects the anode of load LED；Described two
The anode of pole pipe D2 connects one end of the inductance T1 and 5 feet and 6 feet of the power supply chip U1；The other end of the inductance T1
It is separately connected the source electrode of the cathode of the electrolytic capacitor C1, the other end of resistance R1 and metal-oxide-semiconductor Q1；The drain electrode of the metal-oxide-semiconductor Q1
As the cathode output end of power supply, the cathode of the load LED is connected；The source electrode of one end connection metal-oxide-semiconductor Q1 of the capacitor C2,
The other end of the capacitor C2 is connected to the ground GND；3 feet of the power supply chip U1 connect one end of the resistance R8, described
The other end connection ground GND of resistance R8；
Preferably, 5 feet of the power supply chip U1 and 6 feet are identical, and 5 feet and 6 feet of the power supply chip U1 are common
As one end of first switch, the other end of 3 feet of the power supply chip as the first switch, the two of the first switch
Between end inside the power supply chip U1 high-speed switch, direct current after making rectification it is interrupted through overload LED and inductance T1,
Power supply chip U1 is by the voltage of detection resistance R8 to determine whether needing to adjust the PWM waveform of switch, to reach constant current output
Purpose；The diode D2 plays the role of afterflow, and the electrolytic capacitor C1 is filtered into interrupted direct current more pure
Direct current used for the load LED operation, resistance R1 be fictitious load, load LED open circuit when, can quickly bleed off institute
The voltage on electrolytic capacitor C1 is stated, in order to avoid generate dangerous；The both ends of the first switch can be effectively isolated in the capacitor C2
Between peak voltage inside the power supply chip U1 when high-speed switch to protect device injury-free；
Resistance R4, triode Q3, resistance R7, single-chip microcontroller U2, voltage-stabiliser tube D4, diode D3, three terminal regulator chip Q2,
In, one end of the resistance R4 is connected to the cathode output end of the rectifier bridge D1, and the other end of the resistance R4 is connected to three
The collector of pole pipe Q3 and one end of resistance R7, the other end of the resistance R7 are connected to the 8 foot GND of single-chip microcontroller U2；Triode
The base stage of Q3 is connected to the cathode of voltage-stabiliser tube D4, and the anode of the voltage-stabiliser tube D4 is connected to the 8 foot GND of single-chip microcontroller U2；Described three
The emitter of pole pipe Q3 is connected to the anode of diode D3, and the anode of the diode D3 is connected to one end and three ends of capacitor C3
3 foot of input terminal of voltage regulator chip Q2, the other end of the capacitor C3 are connected to the 8 foot GND of the single-chip microcontroller U2；Three end
The 1 foot GND of voltage regulator chip Q2 is connected to the 8 foot GND of the single-chip microcontroller U2；The output end 2 of the three terminal regulator chip Q2
Foot is connected to one end of capacitor C5 and the 8 foot GND of 1 the foot VDD, the single-chip microcontroller U2 of the single-chip microcontroller U2 are connected to the electrolysis
The cathode of capacitor C1；
Preferably, the high voltage direct current after rectifier bridge D1 is supplied triode Q3, triode by the resistance R4 and R7 after decompression
Q3 generates relatively stable DC voltage by the pressure stabilization function of voltage-stabiliser tube D4, and the diode D3 prevents electric current backflow, capacitor
C3 plays the role of filtering voltage regulation, and chip Q2 is three terminal regulator, passes through the voltage of the 3 foot input terminals of three terminal regulator chip Q2
Input can generate a highly stable direct voltage output in 2 foot of output end of three terminal regulator chip Q2, using capacitor
Supply single-chip microcontroller U2 is used after C5 filtering.
The single-chip microcontroller U2 can be using the single-chip microcontroller of the model XY152 of Shenzhen Li Shengmei company.
Resistance R5, resistance R6, photodiode D5, wherein the 1 foot VDD of the single-chip microcontroller U2 is connected to the one of resistance R5
End, the other end of the resistance R5 are connected to the anode of the 7 foot PA4 and photodiode D5 of single-chip microcontroller U2, photodiode D5
Cathode be connected to the 8 foot GND of single-chip microcontroller U2；The 6 foot PA3 of single-chip microcontroller U2 are connected to one end of the resistance R6, the resistance
The other end of R6 is connected to the grid of metal-oxide-semiconductor Q1；
Preferably, after photodiode D5 experiences external environment light intensity, photodiode D5 conducting, single-chip microcontroller U2's
7 foot PA4 voltages are pulled low, and are lower by the 6 foot PA3 voltages of single-chip microcontroller U2 internal processes control single chip computer U2, and metal-oxide-semiconductor Q1 is closed
It is disconnected, then load LED extinguishing；
After photodiode D5, which experiences external environmental light, to die down, pass through single-chip microcontroller U2 internal processes control single chip computer U2
6 foot of PA3 export PWM waveform, make metal-oxide-semiconductor Q1 Discontinuous Conduction, then load LED and discontinuously light, due to human eye vision stop effect
It answers, controls turn-on frequency, then it is discontinuously to light that human eye, which is not felt by load LED,.To which environment light and LED are issued
Light distinguish, allow single-chip microcontroller that can distinguish the light that environment light and LED itself are issued.It avoids interfering and judge by accident.
Here, the application, which exports PWM waveform by 6 foot of PA3 of single-chip microcontroller U2 internal processes control single chip computer U2, drives lamp
Have the metal-oxide-semiconductor Q1 quick on-off on output loop, realize the interrupted output of lamps and lanterns light, to be done with extraneous stable environment light
It distinguishes out.
In addition, single-chip microcontroller U2 detects the variation of ambient by external photodiode D5, if light is interrupted
, then it is shown to be the light of lamps and lanterns itself sending, single-chip microcontroller U2 is failure to actuate, if detecting that light is continuously, to be shown to be outer
The variation of boundary's environment light, single-chip microcontroller U2 execute corresponding movement according to the program set.
In order to export the light of the imperceptible lamps and lanterns of human eye discontinuously, the period of PWM waveform can control in 100mS
Within, it is general to set to ensure that human eye perception is interrupted less than light because it is probably 0.1S that human eye, which has the vision residence time,
The period of PWM waveform is in 10mS or so.Time can not be too short, and the time detection accuracy of too short single-chip microcontroller can decline.
In one specific embodiment, the application provides a door for being equipped with above-mentioned environment photoinduction control lamp switch circuit
Board lamp can perceive the bright dark of environment light, close or open automatically.When environment bright, lamps and lanterns, which are automatically closed, to be in standby,
When environment brightness, lamps and lanterns automatic opening is lighted, and is started to work.Since photosensitive probe is built in lamp interior, so that lamps and lanterns one
Body-sensing is more preferable, more attractive, and can very easily realize higher IP grade.
Obviously, those skilled in the art can carry out various modification and variations without departing from the essence of the application to the application
Mind and range.In this way, if these modifications and variations of the application belong to the range of the claim of this application and its equivalent technologies
Within, then the application is also intended to include these modifications and variations.
It is obvious to a person skilled in the art that invention is not limited to the details of the above exemplary embodiments, Er Qie
In the case where without departing substantially from spirit or essential attributes of the invention, the present invention can be realized in other specific forms.Therefore, no matter
From the point of view of which point, the present embodiments are to be considered as illustrative and not restrictive, and the scope of the present invention is by appended power
Benefit requires rather than above description limits, it is intended that all by what is fallen within the meaning and scope of the equivalent elements of the claims
Variation is included in the present invention.Any reference signs in the claims should not be construed as limiting the involved claims.This
Outside, it is clear that one word of " comprising " does not exclude other units or steps, and odd number is not excluded for plural number.That states in device claim is multiple
Unit or device can also be implemented through software or hardware by a unit or device.The first, the second equal words are used to table
Show title, and does not indicate any particular order.
Claims (7)
1. a kind of environment photoinduction controls lamp switch circuit, wherein the circuit includes:
Insure resistance F1, rectifier bridge D1, wherein the L line of alternating current connects one end of the insurance resistance F1, the insurance resistance F1
The other end connect an input terminal of the rectifier bridge D1, the N line of alternating current connects another input terminal of the rectifier bridge D1；
Resistance R2, resistance R3, power supply chip U1 and capacitor C4, wherein the positive output end of the rectifier bridge D1 connects the electricity
One end of R2 is hindered, the other end of the resistance R2 connects one end of the resistance R3, and the other end of the resistance R3 is connected to institute
State one end of the 4 foot VCC and capacitor C4 of power supply chip U1, the other end of the capacitor C4 be connected to rectifier bridge D1 negative pole end and
The 8 foot GND of the power supply chip U1；
Diode D2, electrolytic capacitor C1, resistance R1, inductance T1, metal-oxide-semiconductor Q1, capacitor C2, resistance R8, wherein the rectifier bridge D1
One end respectively with the cathode of the diode D2, the anode of electrolytic capacitor C1, resistance R1 of positive output end link together
As the cathode output end of power supply, the anode output of the power supply to link together connects the anode of load factor LED；Described two
The anode of pole pipe D2 connects one end of the inductance T1 and 5 feet and 6 feet of the power supply chip U1；The other end of the inductance T1
It is separately connected the source electrode of the cathode of the electrolytic capacitor C1, the other end of resistance R1 and metal-oxide-semiconductor Q1；The drain electrode of the metal-oxide-semiconductor Q1
As the cathode output end of power supply, the cathode of the load LED is connected；The source electrode of one end connection metal-oxide-semiconductor Q1 of the capacitor C2,
The other end of the capacitor C2 is connected to the ground GND；3 feet of the power supply chip U1 connect one end of the resistance R8, described
The other end connection ground GND of resistance R8；
Resistance R4, triode Q3, resistance R7, single-chip microcontroller U2, voltage-stabiliser tube D4, diode D3, three terminal regulator chip Q2, wherein
One end of the resistance R4 is connected to the cathode output end of the rectifier bridge D1, and the other end of the resistance R4 is connected to triode
The collector of Q3 and one end of resistance R7, the other end of the resistance R7 are connected to the 8 foot GND of single-chip microcontroller U2；Triode Q3's
Base stage is connected to the cathode of voltage-stabiliser tube D4, and the anode of the voltage-stabiliser tube D4 is connected to the 8 foot GND of single-chip microcontroller U2；The triode
The emitter of Q3 is connected to the anode of diode D3, and the anode of the diode D3 is connected to one end and the three-terminal voltage-stabilizing of capacitor C3
3 foot of input terminal of device chip Q2, the other end of the capacitor C3 are connected to the 8 foot GND of the single-chip microcontroller U2；The three-terminal voltage-stabilizing
The 1 foot GND of device chip Q2 is connected to the 8 foot GND of the single-chip microcontroller U2；2 foot of output end of the three terminal regulator chip Q2 connects
The 8 foot GND for being connected to one end of capacitor C5 and 1 the foot VDD, the single-chip microcontroller U2 of the single-chip microcontroller U2 are connected to the electrolytic capacitor
The cathode of C1；
Resistance R5, resistance R6, photodiode D5, wherein 1 foot of the single-chip microcontroller U2 connects one end that VDD is connected to resistance R5, institute
State resistance R5 the other end be connected to single-chip microcontroller U2 7 foot PA4 and photodiode D5 anode, the cathode of photodiode D5
It is connected to the 8 foot GND of single-chip microcontroller U2；The 6 foot PA3 of single-chip microcontroller U2 are connected to one end of the resistance R6, and the resistance R6's is another
One end is connected to the grid of metal-oxide-semiconductor Q1.
2. circuit according to claim 1, wherein from the rectifier bridge D1 export direct current, by the resistance R2,
Low-voltage direct is generated after the decompression of resistance R3 current limliting, then pure low-voltage direct is generated by capacitor C4 filtering and supplies electricity to the power supply core
Piece U1 power supply.
3. circuit according to claim 1, wherein 5 feet and 6 feet of the power supply chip U1 are identical, the power supply chip
The one end of 5 feet and 6 feet of U1 collectively as first switch, the other end of 3 feet of the power supply chip as the first switch,
Between the both ends of the first switch inside the power supply chip U1 high-speed switch, the interrupted process of direct current after making rectification
LED and inductance T1 is loaded, power supply chip U1 adjusts the PWM waveform of output by the voltage of detection resistance R8.
4. circuit according to claim 1, wherein the electrolytic capacitor C1 is filtered into interrupted direct current pure straight
Galvanic electricity is used for the load LED operation, and the resistance R1 is fictitious load, when loading LED open circuit, bleeds off the electrolytic capacitor
Voltage on C1, in order to avoid generate dangerous；The capacitor C2 is for being isolated between the both ends of the first switch in the power supply core
Peak voltage inside piece U1 when high-speed switch is to protect device injury-free.
5. circuit according to claim 1, wherein the resistance R4 and R7 is the high voltage direct current after rectifier bridge D1, decompression
Triode Q3 is supplied afterwards, and triode Q3 generates steady dc voltage by the pressure stabilization function of voltage-stabiliser tube D4, passes through three-terminal voltage-stabilizing
The voltage input of the 3 foot input terminals of device chip Q2 generates a stable direct current in 2 foot of output end of three terminal regulator chip Q2
Voltage output is used using supply single-chip microcontroller U2 after capacitor C5 filtering.
6. circuit according to claim 1, wherein after the photodiode D5 experiences external environment light intensity, light
Quick diode D5 conducting, the 7 foot PA4 voltages of single-chip microcontroller U2 are pulled low, and the 6 foot PA3 voltages of single-chip microcontroller U2 are lower, and make metal-oxide-semiconductor Q1
Shutdown then loads LED extinguishing；
After photodiode D5, which experiences external environmental light, to die down, the 6 foot PA3 control output PWM waveform of single-chip microcontroller U2 makes
Metal-oxide-semiconductor Q1 Discontinuous Conduction then loads LED and discontinuously lights.
7. circuit according to claim 6, wherein the period of the 6 foot PA3 of single-chip microcontroller U2 output PWM waveform is
10mS。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910425336.5A CN110113842B (en) | 2019-05-21 | 2019-05-21 | Ambient light induction control lamp switch circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910425336.5A CN110113842B (en) | 2019-05-21 | 2019-05-21 | Ambient light induction control lamp switch circuit |
Publications (2)
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| CN111148320A (en) * | 2020-01-14 | 2020-05-12 | 浙江阳光美加照明有限公司 | Light control circuit of LED lamp |
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| CN110113842B (en) | 2024-03-05 |
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