CN106255272B - A kind of light adjusting circuit - Google Patents
A kind of light adjusting circuit Download PDFInfo
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- CN106255272B CN106255272B CN201610797680.3A CN201610797680A CN106255272B CN 106255272 B CN106255272 B CN 106255272B CN 201610797680 A CN201610797680 A CN 201610797680A CN 106255272 B CN106255272 B CN 106255272B
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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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- Circuit Arrangement For Electric Light Sources In General (AREA)
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Abstract
A kind of light adjusting circuit, the LED lamp panel circuit to be formed, touch-control chip U3 are then concatenated with field-effect tube including decompression chip U1 circuits, MCU control chips U2, multiple LED light parallel connections, the supply voltage is connect with input terminal, the LED lamp panel circuit of decompression chip U1 circuits, the output end of the decompression chip U1 circuits is connect with MCU control chips U2, touch-control chip U3, the MCU controls chip U2 circuits are connect with touch-control chip U3, and LED lamp panel circuit is connect with MCU controls chip U2.This circuit structure is simple, unrestricted for the dimming scope on lamps and lanterns, can realize that 0~100% non-pole light regulating, user can arbitrarily adjust the shading value of light according to demand;Circuit stability is high, has anti-interference ability, applied widely.
Description
Technical field
The invention belongs to circuit lighting technical fields, and in particular to a kind of light adjusting circuit.
Background technology
In existing lighting technology, different people is different to the tolerance level of light, and different time sections difference field
Scape is also different to the use demand of light, therefore the brightness adjustability of light has very big influence to the convenience of life.And mesh
The lamp of preceding tunable optical is mostly Discrete control, i.e., lamps and lanterns have just defined after manufacture can dim gear number, it is common for 0%/
In addition 10%/50%/100% 4 section of light modulation or Duo Duan Tone light also have and use TRIAC light modulators, but the light modulator is at light load
Efficiency can be very low, and only about 10%.Efficiency it is too low or light modulation brightness limited, be all unfavorable for people and freely manipulate light
Brightness.
Therefore, it is necessary to a kind of the light illumination mode of brightness can be arbitrarily adjusted to improve the convenience of life and meet different people
Demand to light luminance.
Invention content
The purpose of the present invention is to solve mesh light can only be segmented adjustment or the low problem of regulated efficiency, provides one
Kind non-pole light regulating circuit.
In order to reach foregoing invention purpose, the present invention uses following technical scheme:A kind of light adjusting circuit, including decompression chip
U1 circuits, MCU control chips U2, multiple LED parallel connections then concatenate the LED lamp panel circuit to be formed, touch-control chip with field-effect tube
U3, the supply voltage are connect with input terminal, the LED lamp panel circuit of decompression chip U1 circuits, the decompression chip U1 circuits
Output end is connect with MCU control chips U2, touch-control chip U3, and the MCU controls chip U2 is connect with touch-control chip U3, LED light
Plate circuit is connect with MCU controls chip U2.
Supply voltage output voltage after being depressured chip U1 pressure drops is powered respectively to touch-control chip U3, MCU control chip U2,
Supply voltage is powered to LED lamp panel circuit, and touch-control chip U3 is touched one action of generation and outputs signal to MCU
Chip U2 is controlled, the signal that chip U2 is controlled by MCU is converted and delivers it to field-effect tube after adjusting, and is imitated by field
The number that electronics discharges between tube grid and source electrode is answered to control multiple LED lamplight brightness in parallel.
Further, the decompression chip U1 circuits are 3 foot of input terminal, the capacitance C1 of supply voltage+12V and decompression chip U1
Anode, the one end capacitance C4 be separately connected, the cathode of capacitance C1, capacitance C4 other ends ground connection;It is depressured 2 foot of output end of chip U1
2 foot of output end of output voltage+3V, decompression chip U1 connect capacitance C2 anodes, the one end capacitance C3, and capacitance C2 cathode, capacitance C3 are another
One end, the common end 1 foot ground connection for being depressured chip U1.The input of decompression chip U1, output end all connect sized capacitors in parallel and enter
Decoupling filtering, improves circuital current stability.
Further, the multiple LED parallel connections are several LED branch circuit parallel connections, the terminal input section that several LED branch circuit parallel connections are formed
Point, output end node connect the drain electrode of supply voltage, field-effect tube Q1 respectively, and the wherein first branch includes concatenated light emitting diode
D1, light emitting diode D6, the second branch include the light emitting diode D2, light emitting diode D7, light emitting diode being sequentially connected in series
D11, third branch include the light emitting diode D3 being sequentially connected in series, light emitting diode D8, light emitting diode D12, the 4th branch packet
The light emitting diode D4, light emitting diode D9, light emitting diode D13 being sequentially connected in series are included, the first branch includes the hair being sequentially connected in series
Optical diode D5, light emitting diode D10, light emitting diode D14.
Further, the first branch, the second branch, third branch, the 4th branch, the 5th road are equipped with resistance,
Specifically, resistance R1, resistance R2, resistance R3 parallel connections formed two nodes respectively with the cathode of light emitting diode D6, resistance R4,
The node connection that resistance R5, resistance R6 parallel connections are formed, resistance R4, resistance R5, another node of resistance R6 parallel connections and field are imitated
Should pipe Q1 drain electrode connection, resistance R7, resistance R8, resistance R9 parallel connections formed both ends node respectively with light emitting diode D11
Cathode, field-effect tube Q1 drain electrode connection, resistance R10, resistance R11, resistance R12 parallel connections formed both ends node respectively with
The drain electrode connection of the cathode of light emitting diode D12, field-effect tube Q1, resistance R13, resistance R14, resistance R15 parallel connections formed two
The node at end is connect with the drain electrode of the cathode of light emitting diode D13, field-effect tube Q1 respectively, resistance R16, resistance R17, resistance
The node at the both ends that R18 parallel connections are formed is connect with the drain electrode of the cathode of light emitting diode D14, field-effect tube Q1 respectively.Luminous two
The branch road series resistor of pole pipe (i.e. LED light) is for pressure limiting, and resistance is to dissipate respectively using multiple resistor coupled in parallel modes
Heat avoids single electrical resistance overheats.
Further, one end source electrode difference resistance R20 of field-effect tube Q1, the connection of the one end resistance R21, the one end resistance R20,
The resistance R21 other ends are connect while ground connection with the one end capacitance C5, and the resistance R20 other ends control core with the capacitance C5 other ends, MCU
6 feet of piece U2 connect, and the grid of field-effect tube Q1 connect the 7th foot for being followed by MCU control chips U2 with resistance R19.MCU controls core
Piece U2 is released by grid (G) signal of field-effect tube Q1 further to control between grid and source electrode the electronics between (i.e. GS)
It puts to control the brightness of multiple LED.
Further, 15 feet, the one end resistance R22, the resistance of 1 foot of voltage+3V and MCU control chips U2, touch-control chip U3
The one end R23, the one end resistance R24, the one end resistance R25 are separately connected, and the resistance R22 other ends control 2 feet of chip U2 with MCU, touch
17 feet of control chip U3 are separately connected, and the resistance R23 other ends are distinguished with 3 feet of MCU control chips U2,18 feet of touch-control chip U3
Connection, the resistance R24 other ends are separately connected with 5 feet of MCU control chips U2,20 feet of touch-control chip U3, the resistance R25 other ends
It is connect with 5 feet of touch-control chip U3.
Further, 14 feet of touch-control chip U3 are connect with the one end capacitance C6, the one end capacitance C7, the capacitance C6 other ends, electricity
Hold C7 other ends ground connection.The different size of capacitance C6 of parallel connection, capacitance C7 are played a filtering role, and the power supply for being conducive to chip acquisition is steady
It is fixed.
Further, 15 feet of touch-control chip U3 are connect with the one end capacitance C8, the one end capacitance C9, the capacitance C8 other ends, electricity
Hold C9 other ends ground connection.The different size of capacitance C8 of parallel connection, capacitance C9 are played a filtering role, and the power supply for being conducive to chip acquisition is steady
It is fixed.
Compared with prior art, the present invention advantageous effect is:This circuit structure is simple, not for the dimming scope on lamps and lanterns
It is restricted, can realize that 0~100% non-pole light regulating, user can arbitrarily adjust the shading value of light according to demand;Circuit is steady
Qualitative height has anti-interference ability, applied widely.
Description of the drawings
Fig. 1 is the schematic diagram of light adjusting circuit.
Specific implementation mode
Explanation is further described to technical scheme of the present invention below by specific embodiment.
A kind of light adjusting circuit, including decompression chip U1 circuits, MCU control chips U2, multiple LED parallel connections then with field-effect
Pipe concatenates the LED lamp panel circuit to be formed, touch-control chip U3, the supply voltage and the input terminal, the LED light that are depressured chip U1 circuits
Plate circuit connects, and the output end of the decompression chip U1 circuits is connect with MCU control chips U2, touch-control chip U3, the MCU controls
Coremaking piece U2 is connect with touch-control chip U3, and LED lamp panel circuit is connect with MCU controls chip U2.MCU controls chip U2 and uses
PIC12F1501 models, touch-control chip U3 use IQS333_QFN20 models.
It is depressured 3 foot of input terminal, the anode of capacitance C1, the capacitance that chip U1 circuits are supply voltage+12V and decompression chip U1
The one end C4 is separately connected, the cathode of capacitance C1, capacitance C4 other ends ground connection;The 2 foot output voltage of output end of decompression chip U1+
2 foot of output end of 3V, decompression chip U1 connect capacitance C2 anodes, the one end capacitance C3, capacitance C2 cathode, the capacitance C3 other ends, decompression
The common end 1 foot ground connection of chip U1.The input of decompression chip U1, output end all connect sized capacitors in parallel and enter decoupling filtering,
Improve circuital current stability.Being depressured chip U1 uses MCP1703-3302 models, capacitance C1 sizes to select 10UF, capacitance C4 big
Small selection 1UF, capacitance C3 sizes select 0.1UF, capacitance C2 sizes to select 4.7UF.
Multiple LED parallel connections are several LED branch circuit parallel connections, the input terminal node of several LED branch circuit parallel connections formation, output end segment
Point connects the drain electrode of supply voltage, field-effect tube Q1 respectively, and the wherein first branch includes concatenated light emitting diode D1, light-emitting diodes
Pipe D6, the second branch include the light emitting diode D2, light emitting diode D7, light emitting diode D11 being sequentially connected in series, third branch packet
The light emitting diode D3 being sequentially connected in series, light emitting diode D8, light emitting diode D12 are included, the 4th branch includes the hair being sequentially connected in series
Optical diode D4, light emitting diode D9, light emitting diode D13, the first branch include the light emitting diode D5 being sequentially connected in series, shine
Diode D10, light emitting diode D14.
The first branch, the second branch, third branch, the 4th branch, the 5th road are equipped with resistance, specifically, resistance R1,
Resistance R2, resistance R3 parallel connections formed two nodes respectively with the cathode of light emitting diode D6, resistance R4, resistance R5, resistance R6
The node connection that parallel connection is formed, resistance R4, resistance R5, another node of resistance R6 parallel connections and the drain electrode of field-effect tube Q1 connect
Connect, resistance R7, resistance R8, resistance R9 parallel connections formed both ends node respectively with the cathode of light emitting diode D11, field-effect tube
The drain electrode of Q1 connects, and the node at the both ends that resistance R10, resistance R11, resistance R12 parallel connections are formed is respectively with light emitting diode D12's
Cathode, field-effect tube Q1 drain electrode connection, resistance R13, resistance R14, resistance R15 parallel connections formed both ends node respectively with hair
The drain electrode connection of the cathode, field-effect tube Q1 of optical diode D13, the both ends that resistance R16, resistance R17, resistance R18 parallel connections are formed
Node connect respectively with the drain electrode of the cathode of light emitting diode D14, field-effect tube Q1.The branch of light emitting diode (i.e. LED light)
Road series resistor is for pressure limiting, and resistance is to avoid single resistance mistake to radiate respectively using multiple resistor coupled in parallel modes
Heat.Three parallel resistance sizes for being connected on branch road all select 68 Ω.
One end source electrode difference resistance R20 of field-effect tube Q1, the connection of the one end resistance R21, the one end resistance R20, resistance R21 are another
One end is connect while ground connection with the one end capacitance C5, the resistance R20 other ends and the capacitance C5 other ends, 6 feet of MCU control chips U2
Connection, the grid of field-effect tube Q1 connect the 7th foot for being followed by MCU control chips U2 with resistance R19.MCU controls chip U2 passes through
Grid (G) signal of field-effect tube Q1 controls further to control between grid and source electrode the release of the electronics between (i.e. GS)
The brightness of multiple LED.Field-effect tube Q1 selects APM2306 models, is a kind of depletion type PMOS tube, and resistance R19 sizes are selected
200 Ω, resistance R20 select 10K, and it is 0.1UF that resistance R21 sizes, which select 0.1 Ω, capacitance C5,.
1 foot of voltage+3V and MCU control chip U2,15 feet of touch-control chip U3, the one end resistance R22, the one end resistance R23,
The one end resistance R24, the one end resistance R25 are separately connected, 2 feet, the touch-control chip U3 of the resistance R22 other ends and MCU control chips U2
17 feet be separately connected, 3 feet of the resistance R23 other ends and MCU control chip U2,18 feet of touch-control chip U3 are separately connected, electricity
The resistance R24 other ends are separately connected with 5 feet of MCU control chips U2,20 feet of touch-control chip U3, the resistance R25 other ends and touch-control
5 feet of chip U3 connect.Resistance R22, resistance R23, resistance R24, resistance R25 sizes select 4.7K.
14 feet of touch-control chip U3 are connect with the one end capacitance C6, the one end capacitance C7, the capacitance C6 other ends, the capacitance C7 other ends
Ground connection.The different size of capacitance C6 of parallel connection, capacitance C7 are played a filtering role, and are conducive to the power good of chip acquisition.Capacitance C6, electricity
The size for holding C7 selects 1UF, 100PF respectively.
15 feet of touch-control chip U3 are connect with the one end capacitance C8, the one end capacitance C9, the capacitance C8 other ends, the capacitance C9 other ends
Ground connection.The different size of capacitance C8 of parallel connection, capacitance C9 are played a filtering role, and are conducive to the power good of chip acquisition.Capacitance C6, electricity
The size for holding C7 selects 1UF, 100PF respectively.
The light adjusting circuit of the present embodiment, touch-control chip U3 pre-set complete routine, the control of Ke Yi Tong Time controls 0~6
It is processed, following 9/8/7 pin RX3/RX4/RX5 (control light modulation) and 6 pin RX6 (Kong Open may be used in this programme
Off) realize control, switch (a bit) with dim () at 3 points, switching point, RX3/RX4/RX5 are capacitor induction type to RX6 in order to control
Contact point is separately designed at product casing along with the voltage of finger forms the dislocation of a capacitance with circuit LAYOUT, allows touch-control
The pin RX3/RX4/RX5 actions of chip U3, output signal (SDA) receive news to MCU control chip U2, MCU controls chip U2
Number (analog signal), after conversion (digital signal), MCU controls chip U2 and calculates voltage adjustment ratio (A/D conversions) output RA0,
RA0 exports analog signal, and MOSFET (i.e. field-effect tube Q1) is supplied to start electronic switch, the release number (GS of utilizes lock grade
Release), to control the brightness size at the ends LED.
It is above the preferred embodiment of the present invention, protection scope of the present invention is not limited, for people in the art
The deformation and improvement that member's mentality of designing according to the present invention is made, all should be considered as within protection scope of the present invention.
Claims (4)
1. a kind of light adjusting circuit, which is characterized in that the circuit includes decompression chip U1 circuits, MCU control chips U2, multiple LED
Lamp parallel connection then concatenates the LED lamp panel circuit to be formed, touch-control chip U3, supply voltage and decompression chip U1 circuits with field-effect tube
Input terminal, the connection of LED lamp panel circuit, output end and MCU control chip U2, the touch-control chip U3 of the decompression chip U1 circuits
Connection, the MCU controls chip U2 are connect with touch-control chip U3, and LED lamp panel circuit is connect with MCU controls chip U2;Touch-control is brilliant
15 feet of piece U3 are connect with the one end capacitance C8, the one end capacitance C9, the capacitance C8 other ends, capacitance C9 other ends ground connection;
The decompression chip U1 circuits are 3 foot of input terminal, the anode of capacitance C1, the capacitance of supply voltage+12V and decompression chip U1
The one end C4 is separately connected, the cathode of capacitance C1, capacitance C4 other ends ground connection;The 2 foot output voltage of output end of decompression chip U1+
2 foot of output end of 3V, decompression chip U1 connect capacitance C2 anodes, the one end capacitance C3, capacitance C2 cathode, the capacitance C3 other ends, decompression
The common end 1 foot ground connection of chip U1;MCU controls chip U2 and uses PIC12F1501 models;Touch-control chip U3 uses IQS333_
QFN20 models;
1 foot of voltage+3V and MCU control chips U2,15 feet, the one end resistance R22, the one end resistance R23, the resistance of touch-control chip U3
The one end R24, the one end resistance R25 are separately connected, 2 feet of the resistance R22 other ends and MCU control chips U2, the 17 of touch-control chip U3
Foot is separately connected, and the resistance R23 other ends are separately connected with 3 feet of MCU control chips U2,18 feet of touch-control chip U3, resistance R24
The other end is separately connected with 5 feet of MCU control chips U2,20 feet of touch-control chip U3, the resistance R25 other ends and touch-control chip U3
5 feet connection;14 feet of touch-control chip U3 are connect with the one end capacitance C6, the one end capacitance C7, and the capacitance C6 other ends, capacitance C7 are another
End ground connection.
2. a kind of light adjusting circuit according to claim 1, which is characterized in that the multiple LED parallel connections are several LED branches
Parallel connection, input terminal node, the output end node of several LED branch circuit parallel connections formation connect the leakage of supply voltage, field-effect tube Q1 respectively
Pole, the wherein first branch include concatenated light emitting diode D1, light emitting diode D6, and the second branch includes shining of being sequentially connected in series
Diode D2, light emitting diode D7, light emitting diode D11, third branch include the light emitting diode D3 being sequentially connected in series, luminous two
Pole pipe D8, light emitting diode D12, the 4th branch include the light emitting diode D4, light emitting diode D9, light-emitting diodes being sequentially connected in series
Pipe D13, the first branch include the light emitting diode D5, light emitting diode D10, light emitting diode D14 being sequentially connected in series.
3. a kind of light adjusting circuit according to claim 2, which is characterized in that the first branch, the second branch, third branch
Road, the 4th branch, the 5th road are equipped with resistance, specifically, two nodes that resistance R1, resistance R2, resistance R3 parallel connections are formed
The node formed respectively with the cathode of light emitting diode D6, resistance R4, resistance R5, resistance R6 parallel connections is connect, resistance R4, electricity
Resistance R5, resistance R6 parallel connections another node connect with the drain electrode of field-effect tube Q1, resistance R7, resistance R8, resistance R9 parallel connections are formed
The node at both ends connect respectively with the drain electrode of the cathode of light emitting diode D11, field-effect tube Q1, resistance R10, resistance R11, electricity
The node at the both ends that resistance R12 parallel connections are formed is connect with the drain electrode of the cathode of light emitting diode D12, field-effect tube Q1 respectively, resistance
The node at the both ends that R13, resistance R14, resistance R15 parallel connections are formed respectively with the cathode of light emitting diode D13, field-effect tube Q1
The node of drain electrode connection, the both ends that resistance R16, resistance R17, resistance R18 parallel connections are formed is negative with light emitting diode D14 respectively
The drain electrode connection of pole, field-effect tube Q1.
4. a kind of light adjusting circuit according to claim 1 or 3, which is characterized in that the source electrode of field-effect tube Q1 respectively with electricity
The one end R20, the connection of the one end resistance R21 are hindered, the resistance R21 other ends are connect while ground connection with the one end capacitance C5, and resistance R20 is another
6 feet with the capacitance C5 other ends, MCU control chips U2 are held to connect, the grid of field-effect tube Q1 is connect with resistance R19 is followed by MCU
Control the 7th foot of chip U2.
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CN201610797680.3A CN106255272B (en) | 2016-08-31 | 2016-08-31 | A kind of light adjusting circuit |
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CN201610797680.3A CN106255272B (en) | 2016-08-31 | 2016-08-31 | A kind of light adjusting circuit |
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CN106255272A CN106255272A (en) | 2016-12-21 |
CN106255272B true CN106255272B (en) | 2018-11-02 |
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CN202514101U (en) * | 2011-11-16 | 2012-10-31 | 南京中电熊猫照明有限公司 | Dimming and toning illumination system |
US8907580B2 (en) * | 2013-02-02 | 2014-12-09 | Supertex, Inc. | Circuit and method for flicker suppression in light emitting diodes (LEDs) |
CN203661378U (en) * | 2014-01-16 | 2014-06-18 | 南京信息工程大学 | Solar street lamp control device |
CN205993006U (en) * | 2016-08-31 | 2017-03-01 | 浙江宙辉电器有限公司 | A kind of light adjusting circuit |
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