CN205830115U - A kind of LED street lamp constant-current source - Google Patents
A kind of LED street lamp constant-current source Download PDFInfo
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- CN205830115U CN205830115U CN201620792858.0U CN201620792858U CN205830115U CN 205830115 U CN205830115 U CN 205830115U CN 201620792858 U CN201620792858 U CN 201620792858U CN 205830115 U CN205830115 U CN 205830115U
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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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Abstract
This utility model provides LED street lamp constant-current source, solves the problem that existing LED street lamp constant-current source is expensive, precision is low and intelligence degree is low.Its scheme is, including power module, control unit, current sampling circuit, telecommunication circuit and constant current source driving circuit, described power supply sample circuit is connected with control unit, control circuit is connected with telecommunication circuit, control circuit is connected with constant current source driving circuit, and power module is connected with current sampling circuit, control unit, telecommunication circuit and constant current source driving circuit and provides electric energy.This utility model is according to the temperature information of LED and the brightness of the monochrome information Intelligent adjustment LED street lamp of LED, exportable high-precision continuous current, can be by the brightness of LED and malfunction coefficient at host computer by telecommunication circuit, it is easy to maintainer and searches maintenance, components and parts used are few, cheap, practical, can promote the use of.
Description
Technical field
This utility model galvanostat technical field, relates to a kind of LED street lamp constant-current source.
Background technology
Roadway illumination is closely related with the productive life of people, and along with the quickening of Urbanization in China, LED street lamp is with fixed
Regarding of people is gradually entered into, the advantage such as drive characteristic is good, corresponding speed is fast, shock resistance is high, length in service life, environmental protection
Open country, becomes and has most the energy-conserving light source of new generation substituting conventional light source advantage, and LED street lamp has environment friendly and pollution-free, consumption
The features such as electricity is few, and light efficiency is high, life-span length, therefore, LED street lamp will become the optimum selection of reducing energy consumption.
But the constant-current source driving means individually developed for LED street lamp is also little, existing LED street lamp constant-current source
Expensive, current precision is low, intelligence degree is low in Heng Yuan output.
Summary of the invention
For above-mentioned situation, for overcoming the defect of prior art, the purpose of this utility model is just to provide a kind of LED street lamp
Constant-current source, effectively solves the problem that existing LED street lamp constant-current source is expensive, precision is low and intelligence degree is low.
Its solution is, drives including power module, control unit, current sampling circuit, telecommunication circuit and constant-current source
Circuit, described power supply sample circuit is connected with control unit, and control circuit is connected with telecommunication circuit, and control circuit is driven with constant-current source
Galvanic electricity road connects, and power module is connected with current sampling circuit, control unit, telecommunication circuit and constant current source driving circuit and provides
Electric energy,
Described power module includes that transformator TR2, resistance R6, electric capacity C20, rectifier bridge BR1, electric capacity C21, the one or three end are steady
Pressure integrated circuit U1 and the second circuit of three-terminal voltage-stabilizing integrated U2, the primary coil of described transformator TR2 electrically connects with 220V city, becomes
One end of the secondary coil of depressor TR2 is connected with one end of resistance R6, the secondary coil of transformator TR2 and one end of electric capacity C20
Connecting, the other end of resistance R6 and the other end of electric capacity C20 are all connected with an ac input end of rectifier bridge BR1, rectifier bridge BR1
The other end be connected with the other end of the secondary coil of transformator TR2, a DC output end of rectifier bridge BR1 and electric capacity C21's
One end connects, and the other end of electric capacity C21 is connected with another DC output end of rectifier bridge BR1, one end of electric capacity C21 and the one or three
1 pin of end integrated regulator U1 connects, and 1 pin of the first circuit of three-terminal voltage-stabilizing integrated U1 is connected with one end of electric capacity C10,
1 pin of the first circuit of three-terminal voltage-stabilizing integrated U1 is connected with one end of electrochemical capacitor C11, the first circuit of three-terminal voltage-stabilizing integrated U1's
3 pins are connected with one end of electrochemical capacitor C17, and 3 pins of the first circuit of three-terminal voltage-stabilizing integrated U1 connect with one end of electric capacity C18
Connect, the other end of electric capacity C10, the other end of electrochemical capacitor C11,2 pins of the first circuit of three-terminal voltage-stabilizing integrated U1, electrochemical capacitor
The other end of C17 and the other end of electric capacity C18 all other ends with electric capacity C21 are connected, the 3 of the first circuit of three-terminal voltage-stabilizing integrated U1
Pin output+12V power supply, 3 pins of the first circuit of three-terminal voltage-stabilizing integrated U1 and 1 pin of the second circuit of three-terminal voltage-stabilizing integrated U2
Connecting, 1 pin of the second circuit of three-terminal voltage-stabilizing integrated U2 is connected with one end of electric capacity C5, the second circuit of three-terminal voltage-stabilizing integrated U2's
3 pins are connected with one end of electrochemical capacitor C4, and 3 pins of the second circuit of three-terminal voltage-stabilizing integrated U2 are connected with one end of electric capacity C6,
The 2 of the other end of electric capacity C5, the other end of electrochemical capacitor C4, the other end of electric capacity C6 and the second circuit of three-terminal voltage-stabilizing integrated U2 are drawn
Foot all other ends with electric capacity C21 are connected, the 3 pins output+5V power supplys of the second circuit of three-terminal voltage-stabilizing integrated U2；
Described power supply sample circuit, control unit, telecommunication circuit include that chip U4 that model is ACS712, model are
The temperature sensor U3 of DS18B20, comparator U5, model are the processor U8 of Mage16, photo-coupler U6 and photo-coupler U7,
Described model is 1 pin of the chip U4 of ACS712 and 2 pins are leading-out terminal IN+, and model is 3 pins of the chip U4 of ACS712
Being leading-out terminal IN-with 4 pins, model is that 8 pins of the chip U4 of ACS712 connect+5V power supply, and model is the chip U4 of ACS712
8 pins be connected with one end of electric capacity C9, the other end ground connection GND of electric capacity C9, model be the chip U4 of ACS712 7 pins with
One end of resistance R9 connects, and the other end of resistance R9 is connected with the in-phase input end of comparator U5, the anti-phase input of comparator U5
End is connected with the slider of potentiometer RV1, the minima termination+5V power supply of potentiometer RV1, the maximum end of potentiometer RV1
Ground connection GND, the outfan of comparator U5 is connected with 10 pins of the processor U8 that model is Mage16, and model is the core of ACS712
6 pins of sheet U4 are connected with one end of electric capacity C12, the other end ground connection GND of electric capacity C12, and model is the 5 of the chip U4 of ACS712
Pin ground connection GND, model is that 3 pins of the temperature sensor U3 of DS18B20 connect+5V power supply, and model is that the temperature of DS18B20 passes
The 1 pin ground connection GND of sensor U3, model be 2 pins and the model of the temperature sensor U3 of DS18B20 be the processor of Mage16
9 pins of U8 connect, and model is that 19 pins of the processor U8 of Mage16 are connected with one end of resistance R7, the other end of resistance R7
Being connected with the base stage of audion Q2, the grounded emitter GND of audion Q2, the colelctor electrode of audion Q2 connects with one end of resistance R8
Connecing, another termination+5V power supply of resistance R8, the current collection of audion Q2 extremely leading-out terminal PWM, model is the processor U8 of Mage16
14 pins be connected with one end of resistance R10, the other end of resistance R10 is connected with one end of resistance R11, another of resistance R11
Termination+5V power supply, the other end of resistance R10 is connected with 5 pins of photo-coupler U6, the 4 pin ground connection GND of photo-coupler U6,
2 pins of photo-coupler U6 are outfan IN-, outfan IN-input to host computer, 1 pin of photo-coupler U6 and resistance R16
One end connect, the other end of resistance R16 is connected with the emitter stage of audion Q4, the colelctor electrode of audion Q4 and resistance R15's
One end connects, and the other end of resistance R15 is connected with 5 pins of photo-coupler U7, and 5 pins of photo-coupler U7 are outfan IN+,
Outfan IN+ inputs to host computer, and the base stage of audion Q4 is connected with one end of resistance R14, the other end of resistance R14 and optocoupler
4 pins of clutch U7 connect, and 1 pin of photo-coupler U7 is connected with one end of resistance R13, another termination+5V electricity of resistance R13
Source, 2 pins of photo-coupler U7 are connected with the emitter stage of audion Q3, grounded collector GND of audion Q3, audion Q3's
Base stage is connected with one end of resistance R12, and the other end of resistance R12 is connected with 15 pins of the processor U8 that model is Mage16；
Described constant current source driving circuit includes chip U9 that model is HV9910B, diode D5, inductance L1, field effect transistor
Q1, LED D2, LED D3 and LED D4, described model is that 12 pins of the chip U9 of HV9910B connect+12V power supply, model
2 pins of chip U9 for HV9910B are connected with one end of electric capacity C1, and the other end ground connection GND of electric capacity C1, model is
3 pins of the chip U9 of HV9910B are connected with leading-out terminal PWM, and model is 4 pins and the resistance R2 of the chip U9 of HV9910B
One end connects, and model is that 4 pins of the chip U9 of HV9910B are connected with one end of electric capacity C2, the other end of resistance R2 and two poles
The positive pole of pipe D1 connects, and the other end of resistance R2 is connected with one end of resistance R1, another termination+5V power supply of resistance R1, two poles
The negative pole of pipe D1 is connected with one end of resistance R3, and the other end of resistance R3 and the other end of electric capacity C2 ground connection GND, model is
5 pins of the chip U9 of HV9910B are connected with one end of resistance R4, and the other end of resistance R4 and model are the chip of HV9910B
6 pins of U9 are all connected with the grid of field effect transistor Q1, and model is 7 pins and field effect transistor Q1 of the chip U9 of HV9910B
Drain electrode connects, and model is that the drain electrode of the chip U9 of HV9910B is connected with one end of resistance R5, the other end ground connection GND of resistance R5,
The source electrode of field effect transistor Q1 is connected with the positive pole of diode D5, and the negative pole of diode D5 connects+12V power supply, the source of field effect transistor Q1
Pole is connected with one end of inductance L1, and the other end of inductance L1 is connected with the negative pole of LED D2, the positive pole of LED D2 and LED D3
Negative pole connect, the positive pole of LED D3 is connected with the negative pole of LED D4, and the positive pole of LED D4 connects+12V power supply, LED D3
Negative pole is connected with leading-out terminal IN-, and the positive pole of LED D3 is connected with leading-out terminal IN+, and the leading-out terminal of the emitter stage of audion Q4 is letter
Number transmission line IN.
This utility model according to the temperature information of LED and the brightness of the monochrome information Intelligent adjustment LED street lamp of LED,
Exportable high-precision continuous current, can be by the brightness of LED and malfunction coefficient at host computer by telecommunication circuit, it is simple to maintenance
People finder keeps in repair, and components and parts used are few, cheap, practical, can promote the use of.
Accompanying drawing explanation
Fig. 1 is the circuit connection diagram of power module of the present utility model.
Fig. 2 is power supply sample circuit of the present utility model, control unit, the circuit connection diagram of telecommunication circuit.
Fig. 3 is the circuit connection diagram of constant current source driving circuit of the present utility model.
Detailed description of the invention
Below in conjunction with accompanying drawing, detailed description of the invention of the present utility model is described in further detail.
Being given by Fig. 1 to Fig. 3, a kind of LED street lamp constant-current source of the present utility model, model is the processor U8 of Mage16
8 pins are connected with one end of crystal oscillator X1, and one end of crystal oscillator X1 is connected with one end of electric capacity C7, and model is the processor U8 of Mage16
7 pins be connected with the other end of crystal oscillator X1, the other end of crystal oscillator X1 is connected with one end of electric capacity C3, the other end of electric capacity C3 and
The other end of electric capacity C7 ground connection GND, model is that 4 pins of the processor U8 of Mage16 are connected with one end of electric capacity C8, model
4 pins of processor U8 for Mage16 are connected with one end of reset key K, and the other end of reset key K and electric capacity C8's is another
One end all connects+5V power supply, and model is that 4 pins of the processor U8 of Mage16 are connected with one end of resistance R17, and resistance R17's is another
One end all ground connection GND.
Described first circuit of three-terminal voltage-stabilizing integrated U1 is the circuit of three-terminal voltage-stabilizing integrated of LM7812.
Described second circuit of three-terminal voltage-stabilizing integrated U2 is the circuit of three-terminal voltage-stabilizing integrated of LM7805.
Described model be the chip U4 of ACS712 be Hall current sensor, this Hall current sensor detection LED D3
Current value, through resistance R9 input to the in-phase input end of comparator U5, the inverting input of comparator U5 connects potentiometer
RV1, the position of the slider of regulator potentiometer RV1, and then change 19 pins of the processor U8 that model is Mage16, output
Adjustable PWM ripple and then the brightness of control LED street lamp, by the chip U4 that model is ACS712, electric capacity C9, resistance R9, electric capacity C12
The current sampling circuit of composition, described current sampling circuit at least 3.
Described model be the chip U9 of HV9910B be PWM high efficiency LED drive chip, can realize when the dutycycle of PWM ripple
During less than 0.5, model is that the chip U9 of HV9910B is operated in constant frequency pattern, when the dutycycle of PWM ripple is more than 0.5, and type
Number it is operated in constant off-time mode for the chip U9 of HV9910B, controls the electric current linear change of LED street lamp.
This utility model in use,
Described model is that the temperature information of the LED self of detection is transmitted to model by the temperature sensor U3 of DS18B20
For the processor U8 of Mage16, model is that the current information transmission of the LED of detection is by the chip U4 of ACS712 to model
The processor U8 of Mage16, after the processor U8 analyzing and processing that model is Mage16, controlling model is the processor of Mage16
The dutycycle of the PWM ripple of U8 output, and then control the brightness of LED；
Telecommunication circuit, described photo-coupler U6 is formed by photo-coupler U6, photo-coupler U7, audion Q3 and audion Q4
Weak current part and strong power part being separated with photo-coupler U7, this circuit is simple, and reliability is high, communication distance is short, uses electric current
Transmit signal, add anti-interference and the fade resistance of telecommunication circuit.
This utility model according to the temperature information of LED and the brightness of the monochrome information Intelligent adjustment LED street lamp of LED,
Exportable high-precision continuous current, can be by the brightness of LED and malfunction coefficient at host computer by telecommunication circuit, it is simple to maintenance
People finder keeps in repair, and components and parts used are few, cheap, practical, can promote the use of.
Claims (4)
1. a LED street lamp constant-current source, drives including power module, control unit, current sampling circuit, telecommunication circuit and constant-current source
Galvanic electricity road, described power supply sample circuit is connected with control unit, and control circuit is connected with telecommunication circuit, control circuit and constant-current source
Drive circuit connects, and power module is connected with current sampling circuit, control unit, telecommunication circuit and constant current source driving circuit and carries
For electric energy, it is characterised in that
Described power module includes transformator TR2, resistance R6, electric capacity C20, rectifier bridge BR1, electric capacity C21, the first three-terminal voltage-stabilizing collection
Becoming circuit U 1 and the second circuit of three-terminal voltage-stabilizing integrated U2, the primary coil of described transformator TR2 electrically connects with 220V city, transformator
One end of the secondary coil of TR2 is connected with one end of resistance R6, and the secondary coil of transformator TR2 is connected with one end of electric capacity C20,
The other end of resistance R6 and the other end of electric capacity C20 are all connected with an ac input end of rectifier bridge BR1, and rectifier bridge BR1's is another
One end is connected with the other end of the secondary coil of transformator TR2, a DC output end of rectifier bridge BR1 and one end of electric capacity C21
Connecting, the other end of electric capacity C21 is connected with another DC output end of rectifier bridge BR1, and one end of electric capacity C21 is steady with the one or three end
1 pin of pressure integrated circuit U1 connects, and 1 pin of the first circuit of three-terminal voltage-stabilizing integrated U1 is connected with one end of electric capacity C10, and first
1 pin of circuit of three-terminal voltage-stabilizing integrated U1 is connected with one end of electrochemical capacitor C11, and the 3 of the first circuit of three-terminal voltage-stabilizing integrated U1 are drawn
Foot is connected with one end of electrochemical capacitor C17, and 3 pins of the first circuit of three-terminal voltage-stabilizing integrated U1 are connected with one end of electric capacity C18, electricity
Hold the other end of C10, the other end of electrochemical capacitor C11,2 pins of the first circuit of three-terminal voltage-stabilizing integrated U1, electrochemical capacitor C17
The other end of the other end and electric capacity C18 all other ends with electric capacity C21 are connected, 3 pins of the first circuit of three-terminal voltage-stabilizing integrated U1
Output+12V power supply, 3 pins of the first circuit of three-terminal voltage-stabilizing integrated U1 and 1 pin of the second circuit of three-terminal voltage-stabilizing integrated U2 are even
Connecing, 1 pin of the second circuit of three-terminal voltage-stabilizing integrated U2 is connected with one end of electric capacity C5, the 3 of the second circuit of three-terminal voltage-stabilizing integrated U2
Pin is connected with one end of electrochemical capacitor C4, and 3 pins of the second circuit of three-terminal voltage-stabilizing integrated U2 are connected with one end of electric capacity C6,
The 2 of the other end of electric capacity C5, the other end of electrochemical capacitor C4, the other end of electric capacity C6 and the second circuit of three-terminal voltage-stabilizing integrated U2 are drawn
Foot all other ends with electric capacity C21 are connected, the 3 pins output+5V power supplys of the second circuit of three-terminal voltage-stabilizing integrated U2；
Described power supply sample circuit, control unit, telecommunication circuit include that chip U4 that model is ACS712, model are DS18B20
Temperature sensor U3, comparator U5, model be the processor U8 of Mage16, photo-coupler U6 and photo-coupler U7, described type
Number being leading-out terminal IN+ for 1 pin of chip U4 and 2 pins of ACS712, model is that 3 pins and 4 of the chip U4 of ACS712 draw
Foot is leading-out terminal IN-, and model is that 8 pins of the chip U4 of ACS712 connect+5V power supply, and model is that the 8 of the chip U4 of ACS712 draws
Foot is connected with one end of electric capacity C9, the other end ground connection GND of electric capacity C9, and model is 7 pins and the resistance of the chip U4 of ACS712
One end of R9 connects, and the other end of resistance R9 is connected with the in-phase input end of comparator U5, the inverting input of comparator U5 and
The slider of potentiometer RV1 connects, the minima termination+5V power supply of potentiometer RV1, the maximum end ground connection of potentiometer RV1
GND, the outfan of comparator U5 is connected with 10 pins of the processor U8 that model is Mage16, and model is the chip U4 of ACS712
6 pins be connected with one end of electric capacity C12, the other end ground connection GND of electric capacity C12, model is 5 pins of the chip U4 of ACS712
Ground connection GND, model is that 3 pins of the temperature sensor U3 of DS18B20 connect+5V power supply, and model is the temperature sensor of DS18B20
The 1 pin ground connection GND of U3, model is 2 pins of the temperature sensor U3 of DS18B20 and the processor U8 that model is Mage16
9 pins connect, and model is that 19 pins of the processor U8 of Mage16 are connected with one end of resistance R7, the other end of resistance R7 and three
The base stage of pole pipe Q2 connects, the grounded emitter GND of audion Q2, and the colelctor electrode of audion Q2 is connected with one end of resistance R8,
Another termination+5V power supply of resistance R8, the current collection of audion Q2 extremely leading-out terminal PWM, model is the processor U8 of Mage16
14 pins are connected with one end of resistance R10, and the other end of resistance R10 is connected with one end of resistance R11, the other end of resistance R11
Connecing+5V power supply, the other end of resistance R10 is connected with 5 pins of photo-coupler U6, the 4 pin ground connection GND of photo-coupler U6, light
2 pins of bonder U6 are outfan IN-, outfan IN-input to host computer, and 1 pin of photo-coupler U6 is with resistance R16's
One end connects, and the other end of resistance R16 is connected with the emitter stage of audion Q4, the colelctor electrode of audion Q4 and the one of resistance R15
End connects, and the other end of resistance R15 is connected with 5 pins of photo-coupler U7, and 5 pins of photo-coupler U7 are outfan IN+, defeated
Going out to hold IN+ to input to host computer, the base stage of audion Q4 is connected with one end of resistance R14, the other end of resistance R14 and optical coupling
4 pins of device U7 connect, and 1 pin of photo-coupler U7 is connected with one end of resistance R13, another termination+5V electricity of resistance R13
Source, 2 pins of photo-coupler U7 are connected with the emitter stage of audion Q3, grounded collector GND of audion Q3, audion Q3's
Base stage is connected with one end of resistance R12, and the other end of resistance R12 is connected with 15 pins of the processor U8 that model is Mage16；
Described constant current source driving circuit include chip U9 that model is HV9910B, diode D5, inductance L1, field effect transistor Q1,
LED D2, LED D3 and LED D4, described model is that 12 pins of the chip U9 of HV9910B connect+12V power supply, and model is
2 pins of the chip U9 of HV9910B are connected with one end of electric capacity C1, the other end ground connection GND of electric capacity C1, and model is HV9910B
3 pins of chip U9 be connected with leading-out terminal PWM, model be one end of 4 pins and the resistance R2 of the chip U9 of HV9910B even
Connecing, model is that 4 pins of the chip U9 of HV9910B are connected with one end of electric capacity C2, and the other end of resistance R2 is with diode D1's
Positive pole connects, and the other end of resistance R2 is connected with one end of resistance R1, another termination+5V power supply of resistance R1, diode D1's
Negative pole is connected with one end of resistance R3, and the other end of resistance R3 and the other end of electric capacity C2 ground connection GND, model is HV9910B
5 pins of chip U9 be connected with one end of resistance R4, the 6 of the other end of resistance R4 and chip U9 that model is HV9910B are drawn
Foot is all connected with the grid of field effect transistor Q1, and model is that 7 pins of the chip U9 of HV9910B connect with the drain electrode of field effect transistor Q1
Connecing, model is that the drain electrode of the chip U9 of HV9910B is connected with one end of resistance R5, the other end ground connection GND of resistance R5, field effect
The source electrode of pipe Q1 is connected with the positive pole of diode D5, and the negative pole of diode D5 connects+12V power supply, the source electrode of field effect transistor Q1 and electricity
One end of sense L1 connects, and the other end of inductance L1 is connected with the negative pole of LED D2, the positive pole of LED D2 and the negative pole of LED D3
Connect, the positive pole of LED D3 is connected with the negative pole of LED D4, and the positive pole of LED D4 connects+12V power supply, the negative pole of LED D3 and
Leading-out terminal IN-connects, and the positive pole of LED D3 is connected with leading-out terminal IN+, and the leading-out terminal of the emitter stage of audion Q4 is signal transmission
Line IN.
A kind of LED street lamp constant-current source the most according to claim 1, it is characterised in that model is the processor U8 of Mage16
8 pins be connected with one end of crystal oscillator X1, one end of crystal oscillator X1 is connected with one end of electric capacity C7, and model is the processor of Mage16
7 pins of U8 are connected with the other end of crystal oscillator X1, and the other end of crystal oscillator X1 is connected with one end of electric capacity C3, the other end of electric capacity C3
With the other end all ground connection GND of electric capacity C7, model is that 4 pins of the processor U8 of Mage16 are connected with one end of electric capacity C8, type
Number it is that 4 pins of processor U8 of Mage16 are connected with one end of reset key K, the other end of reset key K and electric capacity C8's
The other end all connects+5V power supply, and model is that 4 pins of the processor U8 of Mage16 are connected with one end of resistance R17, resistance R17's
The other end all ground connection GND.
A kind of LED street lamp constant-current source the most according to claim 1, it is characterised in that the described first integrated electricity of three-terminal voltage-stabilizing
Road U1 is the circuit of three-terminal voltage-stabilizing integrated of LM7812.
A kind of LED street lamp constant-current source the most according to claim 1, it is characterised in that the described second integrated electricity of three-terminal voltage-stabilizing
Road U2 is the circuit of three-terminal voltage-stabilizing integrated of LM7805.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201620792858.0U CN205830115U (en) | 2016-07-27 | 2016-07-27 | A kind of LED street lamp constant-current source |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201620792858.0U CN205830115U (en) | 2016-07-27 | 2016-07-27 | A kind of LED street lamp constant-current source |
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| CN106989297A (en) * | 2017-05-17 | 2017-07-28 | 成都天星永光照明电器有限公司 | Light-operated LED filament lamp drive system and light-operated LED filament lamp |
| CN108762365A (en) * | 2018-06-29 | 2018-11-06 | 赵明 | It is a kind of output isolation can PWM regulation and control constant-current source circuit |
| CN109329080A (en) * | 2018-11-26 | 2019-02-15 | 张晶 | A kind of environment information acquisition based on LORA remote communication and automatic processing type pig house |
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- 2016-07-27 CN CN201620792858.0U patent/CN205830115U/en active Active
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| CN106989297A (en) * | 2017-05-17 | 2017-07-28 | 成都天星永光照明电器有限公司 | Light-operated LED filament lamp drive system and light-operated LED filament lamp |
| CN106989297B (en) * | 2017-05-17 | 2023-11-28 | 成都天星永光照明电器有限公司 | Light-operated LED filament lamp driving system and light-operated LED filament lamp |
| CN108762365A (en) * | 2018-06-29 | 2018-11-06 | 赵明 | It is a kind of output isolation can PWM regulation and control constant-current source circuit |
| CN108762365B (en) * | 2018-06-29 | 2023-07-04 | 赵明 | Output-isolated PWM-controllable constant current source circuit |
| CN109329080A (en) * | 2018-11-26 | 2019-02-15 | 张晶 | A kind of environment information acquisition based on LORA remote communication and automatic processing type pig house |
| CN109329080B (en) * | 2018-11-26 | 2024-05-03 | 张晶 | Environmental information acquisition and automated processing type pig house based on LORA remote communication |
| CN109736224A (en) * | 2019-02-28 | 2019-05-10 | 河南陆达电子科技有限公司 | A kind of active tunnel contour mark and tunnel traffic inducible system |
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