CN218416725U - Simple photosensitive LED lamp strip circuit - Google Patents
Simple photosensitive LED lamp strip circuit Download PDFInfo
- Publication number
- CN218416725U CN218416725U CN202221764647.8U CN202221764647U CN218416725U CN 218416725 U CN218416725 U CN 218416725U CN 202221764647 U CN202221764647 U CN 202221764647U CN 218416725 U CN218416725 U CN 218416725U
- Authority
- CN
- China
- Prior art keywords
- triode
- resistor
- circuit
- power supply
- voltage
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Circuit Arrangement For Electric Light Sources In General (AREA)
Abstract
The utility model discloses a simple and easy sensitization LED lamp area circuit, it relates to LED circuit technical field. The direct current switch power supply is respectively connected to the positive end and the negative end of a voltage stabilizing diode through a capacitor and a first resistor, the positive end of the voltage stabilizing diode is grounded, the positive end and the negative end of the voltage stabilizing diode are respectively connected with a second resistor and one end from a photosensitive resistor to a third resistor, the other end of the third resistor is connected with the base of a first triode, the collector of the first triode is connected with the base of a second triode, the emitting electrodes of the first triode and the second triode are grounded, the collector of the first triode is connected with a fourth resistor to the direct current switch power supply, and the collector of the second triode is sequentially connected with a fifth resistor, a plurality of light emitting diodes which are connected in series with each other to the direct current switch power supply. The utility model discloses the circuit is succinct, and the debugging is easy, shortens product development cycle, and lamp area constant current, long service life, conversion efficiency is high, easily realizes the intellectuality, uses the adult low, and application prospect is wide.
Description
Technical Field
The utility model relates to a LED circuit technical field, concretely relates to simple and easy sensitization LED lamp area circuit.
Background
The LED lamp strip is characterized in that LEDs are assembled on a strip-shaped flexible circuit board, the product is shaped like a strip, and the LED lamp strip is widely applied to the industries of furniture, automobiles, advertisements, lighting, ships, bars and the like due to the advantages of softness, random curling, cutting, extension, long service life and the like. The low-voltage LED lamp strip generally adopts a multi-path parallel structure, is powered by a constant-voltage power supply, and is formed by connecting a plurality of LED color temperature lamp beads or LED chips in series and then reducing the voltage and limiting the current of the resistors.
The existing scheme of the LED lamp strip has the following defects:
(1) The lamp strip is not constant current: the LED lamp strips are generally powered by a constant voltage power supply (a direct current switching power supply), most of the lamp strips adopt a mode of first series connection and then parallel connection, the series number of fixed LED lamp beads or chips corresponds to a fixed voltage (namely the series number of lamp beads in each meter determines the voltage), each meter of lamp strip is taken as a group, only each group of lamp strip needs to be connected with a resistor in series to limit the current in a lamp strip loop, and the mode can cause unstable circuit current;
(2) LED lamp area conversion efficiency is low: the LED lamp strip generally adopts a series resistor in each group of lamp strings for current limiting protection, the larger the resistance value of the resistor is, the more the groups of the lamp strips connected in parallel are, the lower the overall replacement efficiency of the lamp strip is, and the series resistor can emit heat, so that the risk of poor burning exists;
(3) The lamp strip cannot be intelligentized, and cannot sense the change of the ambient brightness to change the current and the brightness, the whole lamp strip can keep a normally bright state, and the lamp strip needs to be turned on and turned off through a power switch;
(4) The use cost is high, and conventional lamp area keeps the state of always brightening, and the more the electric energy of wasting with the lamp area like this is more, can't reach energy-conserving purpose.
In order to solve the problems, it is particularly necessary to design a novel simple photosensitive LED lamp strip circuit.
SUMMERY OF THE UTILITY MODEL
To exist not enough on the prior art, the utility model aims at providing a simple and easy sensitization LED lamp area circuit, the circuit is succinct, reasonable in design, and the debugging is easy, and the lamp area constant current, conversion efficiency is high, easily realizes the intellectuality, uses the adult low, and the practicality is strong, easily uses widely.
In order to achieve the above purpose, the present invention is realized by the following technical solution: the utility model provides a simple and easy sensitization LED lamp area circuit, includes filter circuit, step-down voltage stabilizing circuit, sensitization control circuit, opposition control circuit, LEDS circuit and constant voltage power supply, and constant voltage power supply is connected with sensitization control circuit through filter circuit, step-down voltage stabilizing circuit, and sensitization control circuit is connected with opposition control circuit, and opposition control circuit and LEDS circuit connection.
The filter circuit comprises a capacitor, the voltage reduction and voltage stabilization circuit comprises a first resistor, a voltage stabilizing diode, a photosensitive control circuit comprises a photosensitive resistor, a second resistor, a third resistor, an inverse phase control circuit comprises a first triode, a second triode, a fourth resistor and a fifth resistor, an LEDS circuit comprises a plurality of groups of light emitting diodes which are connected in series, a constant voltage power supply adopts a direct current switch power supply VCC, the direct current switch power supply VCC is connected with a positive terminal and a negative terminal of the voltage stabilizing diode through the capacitor, the first resistor is connected with a positive terminal and the negative terminal of the voltage stabilizing diode respectively, the positive terminal and the negative terminal of the voltage stabilizing diode are grounded, the second resistor is connected with the negative terminal of the voltage stabilizing diode respectively, the photosensitive resistor is connected with one end of the third resistor, the other end of the third resistor is connected with a base of the first triode, a collector of the first triode is connected with a base of the second triode, an emitter of the first triode is grounded, the collector of the second triode is connected with the fourth resistor to the direct current switch power supply VCC, a collector of the second triode is connected with the fifth resistor in sequence, and a plurality of light emitting diodes which are connected in series to the direct current switch power supply VCC.
Preferably, the first triode and the second triode both adopt a triode MMBT3904.
The utility model has the advantages that: the circuit is simple in circuit, easy to debug, long in service life, high in conversion efficiency, easy to realize intellectualization, low in usage cost and wide in application prospect, and the product development period is shortened, and the lamp strip is provided with a constant current.
Drawings
The present invention will be described in detail with reference to the accompanying drawings and specific embodiments;
fig. 1 is a circuit block diagram of the present invention;
fig. 2 is a circuit diagram of the present invention.
Detailed Description
In order to make the technical means, creation features, achievement purposes and functions of the present invention easy to understand, the present invention is further described below with reference to the following embodiments.
Referring to fig. 1-2, the following technical solutions are adopted in the present embodiment: the utility model provides a simple and easy sensitization LED lamp area circuit, includes filter circuit 1, step-down voltage stabilizing circuit 2, sensitization control circuit 3, inverting control circuit 4, LEDS circuit 5 and constant voltage power supply 6, and constant voltage power supply 6 is connected with sensitization control circuit 3 through filter circuit 1, step-down voltage stabilizing circuit 2, and sensitization control circuit 3 is connected with inverting control circuit 4, and inverting control circuit 4 is connected with LEDS circuit 5.
The filter circuit 1 comprises a capacitor C1, the buck voltage stabilizing circuit 2 comprises a first resistor R1 and a voltage stabilizing diode W1, the photosensitive control circuit 3 comprises a photosensitive resistor RL1, a second resistor R2 and a third resistor R3, the inverting control circuit 4 comprises a first triode Q1, a second triode Q2, a fourth resistor R4 and a fifth resistor R5, the LEDS circuit 5 comprises a plurality of groups of light emitting diodes L which are connected in series, the constant voltage power supply 6 adopts a direct current switching power supply VCC, the direct current switching power supply VCC is respectively connected to the positive terminal and the negative terminal of the voltage stabilizing diode W1 through the capacitor C1 and the first resistor R1, the positive terminal of the voltage stabilizing diode W1 is grounded, the positive terminal and the negative terminal of the voltage stabilizing diode W1 are respectively connected with the second resistor R2 and one end of the photosensitive resistor RL1 to the third resistor R3, the other end of the third resistor R3 is connected with the base of the first triode Q1, the collector of the first triode Q1 is connected with the base of the second triode Q2, the collector of the first triode Q1 and the emitter of the second triode Q2 are respectively connected with the second resistor VCC, the collector of the fourth resistor VCC is sequentially connected with the emitter of the fourth triode Q2, and the emitter of the direct current switching power supply R5, and the emitter of the fifth triode Q2 are connected in series; the first triode Q1 and the second triode Q2 both adopt a triode MMBT3904. The circuit adjusts the voltage of the base electrode of the first triode Q1 through the partial pressure of the photosensitive adjusting RL1/R2 of the photosensitive resistor RL1, controls the on-off of the first triode Q1 and further controls the conducting amplitude of the second triode Q2, thereby changing the brightness atmosphere of the lamp strip after changing along with the ambient light
The circuit of the specific implementation mode is simple, the light is adjusted by adopting the light sensing resistor and two triode circuits, each lamp strip can automatically adjust the light according to the intensity of ambient light, and the capacitor C1 in the filter circuit 1 filters out alternating current components mixed in direct current to stabilize direct current output voltage; the voltage reduction and regulation circuit 2 supplies a stable voltage to the photosensitive resistor RL1 after voltage reduction and current limitation through the first resistor R1 and voltage regulation through the voltage regulation diode W1, and the second resistor R2 stabilizes the base potential of the first triode Q1; the photoresistor RL1 is through the sensing environment luminance to adjust the voltage of second resistance R2, after the third resistance R3 step-down current-limiting, provide first triode Q1's base voltage, thereby the shutoff of the first triode Q1 of control, thereby the shutoff of the second triode Q2 of control through first triode Q1 behind the sensing environment, fourth resistance R4 is first triode Q1 collecting electrode biasing resistance.
The working principle is as follows: the LED lamp strip is characterized in that the anode and the cathode of a plurality of serially connected light emitting diodes L are connected to the anode and the cathode of a direct current switch power supply VCC, stable direct current is output after filtering through a capacitor C1, one path of direct current is subjected to voltage reduction and current limitation through a first resistor R1 and voltage stabilization through a voltage stabilizing diode W1, voltage and current are provided for a photosensitive resistor RL1, base potential is provided for a second resistor R2, and base voltage is provided for a first triode Q1 after voltage division and current limitation are performed through a third resistor R3; the bias resistor fourth resistor R4 provides collector current for the first triode Q1 and base voltage current for the second triode Q2; a collector electrode of the second triode Q2, a fifth resistor R5 of the current-limiting voltage-limiting resistor and the LED lamp bead are connected into VCC, and an emitting electrode of the second triode Q2 is grounded;
(1) when the surrounding environment is dark: the resistance value of the photosensitive resistor RL1 is continuously increased along with the gradual darkening of the light intensity, the current of the photosensitive resistor RL1 is reduced, the node voltage current of the third resistor R3 is continuously reduced, the base voltage current of the first triode Q1 is continuously reduced, the conduction amplitude of the first triode Q1 is increasingly reduced, the base of the second triode Q2 obtains the inverse voltage which is increasingly reduced, the voltage current provided by the fourth resistor R4 is increasingly larger, the base voltage current of the second triode Q2 is increasingly larger, the conduction amplitude of the second triode Q2 is increasingly larger at the moment, the LED lamp strip is gradually lightened, when the first triode Q1 is completely turned off, the second triode Q2 is completely turned on at the moment, and the LED lamp strip is brightest at the moment;
(2) when the surrounding environment is bright: the resistance of the photosensitive resistor RL1 is continuously reduced along with the gradual increase of the light intensity, the current of the photosensitive resistor RL1 is increased, the node voltage of the third resistor R3 is continuously increased, the base voltage of the first triode Q1 is continuously increased when the base voltage of the first triode Q1 is started to be voltage, the first triode Q1 is in a conduction amplification state, the potential of the first triode Q1 is higher and higher, the conduction amplification amplitude of the first triode Q1 is larger and larger, the amplitude of the reversed phase voltage obtained by the base of the second triode Q2 is higher and higher, the conduction amplitude of the second triode Q2 is smaller and smaller, the lamp strip is darker and darker, when the first triode Q1 is completely conducted, the second triode Q2 obtains the maximum reversed phase voltage, the second triode Q2 is in a disconnection cutoff state, and the LED lamp strip is turned off.
This embodiment can set up many LED circuits, adds multistage phototriode control circuit, controls every way LED's brightness respectively, and different designs can be done according to actual need to lamp area circuit board material, LED lamp pearl quantity, overall dimension, mains voltage etc. its technical advantage lies in:
(1) The circuit is concise: the on-off of the first triode is judged through the photosensitive resistance value of the photosensitive resistor by using a simple photosensitive resistor and two triode circuits, so that the on-off and the conducting current of the second triode are adjusted, the brightness of the lamp strip is adjusted, the circuits all adopt universal components, and the PCB of the lamp strip is simple in design and wiring;
(2) Debugging is easier: the lamp strip is not required to be switched on and off and the brightness of the lamp strip is not required to be adjusted by a specific power switch and a dimmer, the troubles of manually switching on and off a power supply and debugging programs are avoided, and meanwhile, the development cycle of the whole product is shortened;
(3) The electronic element has strong replaceability: the circuit elements are all universal electronic elements in the market, and the electronic elements with the same parameter performance can be selected, so that the problems of shortage of goods and overlong delivery period in one supply are avoided, a plurality of electronic elements can be selected, and the types can be more diversified;
(4) The circuit is switched by adopting triode reference voltage, the problem of switching frequency is avoided, no disturbance is generated when the triode is switched on and off, no conduction disturbance and radiation disturbance are generated, and no safety device is required to be added, so that the cost is saved;
(5) The conjunction degree of brightness and ambient light is high, the light strips are light-adjustable naturally, each group of light strips can be independently photosensitive, and no flicker phenomenon exists in the process, so that the market blank of light strip photosensitive light adjustment is filled;
(6) Constant current of the lamp strip: the second triode controls the current of the LED lamp bead, and when the current is too large, the second triode can enter a saturation region, so that the fifth resistor R5 is prevented from being burnt, and the service life of the lamp strip is prolonged;
(7) The product conversion efficiency is high: the current is controlled by using the photosensitive resistor, and a current-limiting resistor does not need to be connected in series in the lamp strip, so that the conversion efficiency of the whole product is improved;
(8) The product can realize intellectualization: the intelligent light control can be carried out on occasions requiring light through the control of the light sensitive resistor;
(9) The use cost is low, and the light becomes dark along with the increase of the ambient brightness, so that the aim of saving energy is fulfilled, one-minute waste is not caused, the product has stronger competitiveness, and the market application prospect is wide.
The basic principles and the main features of the invention and the advantages of the invention have been shown and described above. It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the foregoing embodiments and descriptions are provided only to illustrate the principles of the present invention without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (2)
1. A simple photosensitive LED lamp belt circuit is characterized by comprising a filter circuit (1), a voltage reduction and voltage stabilization circuit (2), a photosensitive control circuit (3), an inverse control circuit (4), an LEDS circuit (5) and a constant voltage power supply (6), wherein the constant voltage power supply (6) is connected with the photosensitive control circuit (3) through the filter circuit (1) and the voltage reduction and voltage stabilization circuit (2), the photosensitive control circuit (3) is connected with the inverse control circuit (4), and the inverse control circuit (4) is connected with the LEDS circuit (5);
the filter circuit (1) comprises a capacitor (C1), the voltage reduction and stabilization circuit (2) comprises a first resistor (R1) and a voltage stabilization diode (W1), the photosensitive control circuit (3) comprises a photosensitive resistor (RL 1), a second resistor (R2) and a third resistor (R3), the reverse phase control circuit (4) comprises a first triode (Q1), a second triode (Q2), a fourth resistor (R4) and a fifth resistor (R5), the LEDS circuit (5) comprises a plurality of groups of light emitting diodes (L) formed by series connection, the constant voltage power supply (6) adopts a direct current switch power supply VCC, the direct current switch power supply VCC is respectively connected with the positive end and the negative end of the voltage stabilization diode (W1) through the capacitor (C1) and the first resistor (R1), the positive end and the negative end of the voltage stabilization diode (W1) are respectively connected with the ground, the positive end and the negative end of the voltage stabilization diode (W1) are respectively connected with the second resistor (R2), the photosensitive resistor (RL 1) is connected with one end of the third resistor (R3), the other end of the third resistor (VCC) is connected with the collector of the first triode (Q1), and the collector of the fourth triode (Q1), and the third triode (Q1) are connected with the emitter of the second triode (Q1), and the third triode (Q2), and the collector electrode of the second triode (Q2) is sequentially connected with a fifth resistor (R5), a plurality of light-emitting diodes (L) connected in series and a direct current switch power supply VCC.
2. The simple light-sensing LED strip circuit according to claim 1, wherein the first triode (Q1) and the second triode (Q2) both adopt a triode MMBT3904.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221764647.8U CN218416725U (en) | 2022-07-08 | 2022-07-08 | Simple photosensitive LED lamp strip circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221764647.8U CN218416725U (en) | 2022-07-08 | 2022-07-08 | Simple photosensitive LED lamp strip circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218416725U true CN218416725U (en) | 2023-01-31 |
Family
ID=85012251
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221764647.8U Active CN218416725U (en) | 2022-07-08 | 2022-07-08 | Simple photosensitive LED lamp strip circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218416725U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116471723A (en) * | 2023-05-25 | 2023-07-21 | 湖北工业大学 | LED serial fault bypass circuit and method based on constant current control |
-
2022
- 2022-07-08 CN CN202221764647.8U patent/CN218416725U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116471723A (en) * | 2023-05-25 | 2023-07-21 | 湖北工业大学 | LED serial fault bypass circuit and method based on constant current control |
| CN116471723B (en) * | 2023-05-25 | 2023-09-15 | 湖北工业大学 | LED serial fault bypass circuit and method based on constant current control |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101636021B (en) | LED constant current driving circuit | |
| CN218416725U (en) | Simple photosensitive LED lamp strip circuit | |
| CN201177243Y (en) | Adjustable light LED lighting lamp | |
| KR20080080956A (en) | Stepless dimming fluorescent lamp and ballast thereof | |
| US9814107B2 (en) | Drive circuit and illumination device comprising the drive circuit | |
| CN216531870U (en) | Light sensing switch circuit and light sensing system | |
| CN203279292U (en) | Double-loop current-limiting drive circuit | |
| CN213991077U (en) | Dimming circuit of dimmer | |
| CN212936245U (en) | Driving power supply for energy-saving intelligent dimming color-mixing LED lamp | |
| CN214205902U (en) | LED constant current controller with over-temperature regulation function | |
| CN220191071U (en) | LED deep dimming circuit and LED lamp | |
| CN219678723U (en) | Constant-voltage dimming timing control circuit and LED lamp | |
| CN213368189U (en) | Constant voltage and constant current power supply circuit for LED lamp | |
| CN216565651U (en) | Simple dimming and toning circuit for alternating current utilization of single-path MOS | |
| CN213694233U (en) | LED constant-brightness adjusting circuit and electronic equipment | |
| CN217470327U (en) | Light emitting device | |
| CN205566709U (en) | Anti -interference power supply circuit of LED | |
| CN218071865U (en) | Energy-saving LED car lamp circuit that can adjust luminance | |
| CN211406379U (en) | Light-adjustable circuit with constant voltage power supply | |
| CN220823326U (en) | LED control circuit and LED dimming power supply | |
| CN216600147U (en) | LED light source driver | |
| CN211557579U (en) | Novel LED plant growth light | |
| CN219145660U (en) | Dimming and toning circuit for lamp | |
| CN212259394U (en) | LED lamp circuit for inputting ultra-wide voltage | |
| CN214674894U (en) | MCU resource occupies circuit few and laser is efficient |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |