CN105491709B - Sound control LED circuit - Google Patents
Sound control LED circuit Download PDFInfo
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- CN105491709B CN105491709B CN201510963113.6A CN201510963113A CN105491709B CN 105491709 B CN105491709 B CN 105491709B CN 201510963113 A CN201510963113 A CN 201510963113A CN 105491709 B CN105491709 B CN 105491709B
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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]
- H05B45/30—Driver circuits
- H05B45/37—Converter circuits
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Abstract
The invention discloses a sound control LED circuit. The sound control LED circuit comprises a transformer, a first voltage regulation circuit, a second voltage regulation circuit, an LED branch circuit, a micro controller, and an LED controller, wherein the transformer comprises a main winding, a primary winding and a secondary winding; the main winding and a first switch are connected between the output end and the grounding end of a rectifying circuit in series; the first voltage regulation circuit is connected between the two ends of the primary winding and used for obtaining a first direct current voltage; the second regulation circuit is connected between the two ends of the secondary winding and used for obtaining a second direct current voltage; the LED branch circuit comprises LEDs, a second switch and a detection resistor that are connected in series in sequence between the first direct current voltage and the grounding end, and one end of the detection resistor provides a feedback voltage; the micro controller outputs a lamplight control signal based on an audio signal collected by a microphone; and the LED controller receives the lamplight control signal and the feedback voltage, and outputs control signals to the first switch and the second switch. Relatively high power supply efficiency of the sound control LED circuit can be realized by adjusting the turns ratio of coils between the primary winding and the secondary winding of the transformer.
Description
【Technical field】
The present invention relates to a kind of circuit design field, more particularly to acoustic control LED (Light Emitting Diode) circuit.
【Background technology】
According to market survey, acoustic control LED is popular, and can substitute current family expenses common bulb.Family expenses common bulb according to
Control to light and turn off the light by mechanical switch.And acoustic control LED is convenient, for example, need not grope mechanical switch in dark, directly
It is controlled by specific sound.In addition acoustic control LED can also realize turn colors, and the effect of regulation brightness, these
Traditional family expenses common bulb cannot be accomplished.On the one hand the function that realize convenient control LED (is for example turned off, started, brightness is adjusted
Section, batch (-type) flicker etc.), on the other hand, it is desirable to which the power supplying efficiency of system is high.
It is necessary to propose a kind of efficient acoustic control LED circuit.
【The content of the invention】
An object of the present invention is to provide a kind of acoustic control LED circuit, and it has higher power supplying efficiency.
For achieving the above object, according to an aspect of the present invention, the present invention provides a kind of acoustic control LED circuit, and it includes：
Rectification circuit, it is by AC rectification into direct current；First switch；Transformer, it includes main winding, the first secondary windings
With second subprime winding, the first end of the main winding is connected with the output end of the rectification circuit, the main winding
Second end is connected by the first switch with earth terminal；First voltage adjustment circuit, it is connected to the of the first secondary windings
Between one end and the second end, for obtaining the first stable DC voltage；Second voltage adjustment circuit, it is connected to second subprime
Between the first end of winding and the second end, for obtaining the second stable DC voltage；LED branch roads, it includes and is sequentially connected in series
One or more LED, second switch and detection resistance between the first DC voltage and earth terminal, the detection electrical measurement with
The connected one end of second switch provides feedback voltage；Microphone, for gathering audio signal；Microcontroller, based on the Mike
The audio signal output light controling signal of elegance collection；LED controller, receives the light controling signal of the microcontroller output
With the feedback voltage, and export the first control signal and constantly conducting or closed with controlling first switch to the first switch
It is disconnected, the second control signal is exported to second switch to control the continuous on or off of second switch, wherein microphone, microcontroller
Device and LED controller are by the second DC-voltage supply.
Further, the LED controller exports the second control signal to control second based on the light controling signal
Switch conduction or cut-off, when second switch is turned on, the LED controller is adjusted based on the feedback voltage and preset reference voltage
The dutycycle of whole first control signal causes the feedback voltage to be equal to control the continuous on or off of first switch, finally
Preset reference voltage.
Further, when second switch ends, the first control signal of LED controller output predetermined duty cycle with
The continuous on or off of control first switch.
Further, the LED controller includes decoder, error amplifier and pulse width modulator, and the decoder connects
Receive the light controling signal, based on the light controling signal export the second control signal, the first of the error amplifier
Input connects the preset reference voltage, and the second input is selectively connected to the feedback voltage or predetermined relatively more electric
Pressure, the second control signal for it is effective when, its control second switch conducting, the second control signal for it is invalid when, its control the
Two switch cut-offs, while the feedback voltage is connected to into the second of the error amplifier when the second control signal is effective
Input, the predetermined comparison voltage is connected to the second input of the error amplifier when the second control signal is invalid
End, the pulse width modulator exports the first control signal based on the error amplification signal of error amplifier output.
Further, the LED controller also includes generating circuit from reference voltage, and it includes being parallel to the second DC voltage
The first current source, the second current source and reference voltage output terminal between, the 3rd current source, and it is series at reference voltage output
End and earth terminal between second resistance, wherein the generating circuit from reference voltage also include respectively with the second current source and the 3rd
Source-series 3rd switch of electric current and the 4th switch, the decoder also exports the 3rd control signal based on the light controling signal
Switched with controlling the 3rd, the 4th control signal is exported to control the 4th switch, so as to change the value of the preset reference voltage.
Further, the LED controller also includes that comparison voltage produces circuit, and it includes being parallel to the second DC voltage
3rd resistor and the 4th resistance and earth terminal between, the voltage of the intermediate node between 3rd resistor and the 4th resistance is exactly institute
State predetermined comparison voltage.
Further, the LED controller also includes the 5th switch, the 6th switch and phase inverter, and the 5th switch is connected to
Between the feedback voltage and the second input of the error amplifier, the 6th switch be connected to the predetermined comparison voltage and
Between second input of the error amplifier, the control that the first control signal that the decoder is exported directly is switched with the 5th
End processed is connected, and is connected with the control end of the 6th switch by the phase inverter.
Further, the rectification circuit include rectifier bridge and be series at the rectifier bridge two output ends between the
One inductance and the first electric capacity, wherein the intermediate node of the first inductance and the first electric capacity is the output end of the rectification circuit, first
Voltage-regulating circuit includes being series at the first diode and the second electric capacity between the first end of the first secondary windings and the second end, the
The intermediate node of one diode and the second electric capacity is the output end of the first voltage adjustment circuit；Second voltage adjustment circuit bag
Include and be series at the second diode and the 3rd electric capacity, the second diode and the 3rd between the first end of second subprime winding and the second end
The intermediate node of electric capacity is the output end of the second voltage adjustment circuit.
Further, the coil ratio of the first secondary windings and second subprime winding is N.VL/Vs, and wherein N is series connection
The number of LED, VL is LED conducting voltages, and Vs is microphone, microprocessor, the minimum operating voltage of LED controller.
Compared with prior art, the acoustic control LED circuit in the present invention, by the first secondary windings for adjusting the transformer
And the coil ratio between second subprime winding, so as to realize higher power supplying efficiency.
【Description of the drawings】
In order to be illustrated more clearly that the technical scheme of the embodiment of the present invention, below will be to use needed for embodiment description
Accompanying drawing be briefly described, it should be apparent that, drawings in the following description are only some embodiments of the present invention, for this
For the those of ordinary skill of field, without having to pay creative labor, can be obtaining other according to these accompanying drawings
Accompanying drawing.Wherein：
Fig. 1 is acoustic control LED circuit in present invention circuit diagram in one embodiment；
Circuit diagrams of the Fig. 2 for the LED controller in Fig. 1 in one embodiment.
【Specific embodiment】
The detailed description of the present invention is mainly by program, step, logical block, process or other symbolistic descriptions come directly
Or the running of simulation technical solution of the present invention indirectly.For the thorough explanation present invention, set forth very in following description
Many specific details.And when without these specific details, it is of the invention then may still be capable of achieving.Technical staff in art makes
With herein these description and state to the others skilled in the art in art effectively introduce they work essence.Change sentence
Talk about, for the purpose of the present invention of avoiding confusion, because well known methods and procedures is easy to understand, therefore they are not detailed
Thin description.
" one embodiment " or " embodiment " referred to herein is referred to and may be included at least one implementation of the invention
Special characteristic, structure or characteristic." in one embodiment " that in this manual different places occur not refers both to same
Individual embodiment, nor single or selectively mutually exclusive with other embodiment embodiment.
Fig. 1 is acoustic control LED circuit 100 in present invention circuit diagram in one embodiment.As shown in Figure 1,
The acoustic control LED circuit 100 includes rectification circuit 110, first switch K1, second switch K2, detection resistance R1, multiple LED, change
Depressor 120, first voltage adjustment circuit 130, second voltage adjustment circuit 140, microphone 150, microcontroller 160 and LED control
Device processed 170.
The rectification circuit 110 is by AC rectification into direct current.In one embodiment, the rectification circuit 110 is wrapped
Rectifier bridge is included and the first inductance L1 for being series between two output ends of the rectification and the first electric capacity C1, wherein the first inductance
The intermediate node of L1 and the first electric capacity C1 is the output end of the rectification circuit 110.The rectifier bridge includes that four endings are connected
Diode, two input accesses the alternating current of 220V.The rectification circuit 110 can by the AC rectification of 220V into
The DC voltage of about 300V.
The transformer 120 includes main winding S1, the first secondary windings S2 and second subprime winding S3.The main
The first end of winding S1 is connected with the output end of the rectification circuit 110, and second end of the main winding S1 is by described the
One switch K1 is connected with earth terminal.
First voltage adjustment circuit 130 is connected between the first end of the first secondary windings S2 and the second end, for obtaining
The first stable DC voltage VA.In one embodiment, first voltage adjustment circuit 130 includes being series at the first secondary windings
The centre of the first diode D1 and the second electric capacity C2, the first diode D1 and the second electric capacity C2 between the first end of S2 and the second end
Node is the output end of the first voltage adjustment circuit 130.
Second voltage adjustment circuit 140 is connected between the first end of second subprime winding S3 and the second end, for obtaining
The second stable DC voltage VB.In one embodiment, second voltage adjustment circuit 140 includes being series at second subprime winding
Second diode D2 and the 3rd electric capacity C3 between the first end of S2 and the second end, the centre of the second diode D2 and the 3rd electric capacity C3
Node is the output end of the second voltage adjustment circuit 140.
One or more LED, second switch K2 and detection resistance R1 are sequentially connected in series in the first DC voltage VA and earth terminal
Between, they can be referred to as LED branch roads, and one end being connected with second switch K2 of the detection electrical measurement R1 provides feedback electricity
Pressure FB.
The microphone 150, microcontroller 160 and the LED controller 170 are powered by the second DC voltage VB.
The microphone 150 is used to gather audio signal.The microcontroller 160 is based on the collection of the microphone 150
Audio signal is analyzed, and corresponding light controling signal CTRL is exported if match control signal to the LED controller
170, to realize for example adjusting brightness or shut-off LED or with control functions such as certain pattern flickers.
LED controller 170 receives the light controling signal CTRL and the feedback voltage of the output of the microcontroller 160
FB, and the first control signal is exported to first switch K1 to control first switch K1 on or off, output second is controlled
Signal ON is to second switch K2 controlling second switch K2 on or off.
When the microcontroller 160 wishes that the LED is lighted, then corresponding light controling signal CTRL is sent to described
LED controller 170.The LED controller 170 exports effective second control signal ON and gives second switch K2, so that second
Switch K2 conductings, while controlling the dutycycle of the first control signal according to the feedback voltage FB and preset reference voltage.LED
The controller feedback voltage FB and preset reference voltage, if the feedback voltage FB is more than preset reference voltage,
Reduce the dutycycle of the first control signal；Conversely, then increasing the dutycycle of the first control signal.So form negative-feedback regu- lation ring
Road, when feedback loop is stable, feedback voltage FB is equal to preset reference voltage, material is thus formed the control to LED current,
Therefore the electric current of LED is accurately adjusted to be equal to resistance value of the preset reference voltage divided by first resistor R1.
When the microcontroller 160 wishes that the LED is closed, then corresponding light controling signal CTRL is sent to described
LED controller 170.The LED controller 170 exports the second invalid control signal ON and gives second switch K2, so that second
Switch K2 cut-offs, while according to predetermined comparison voltage and preset reference voltage come the first control letter of controlled output predetermined duty cycle
Number.In this manner it is ensured that the second DC voltage VB still is able to be maintained within a predetermined range, to microphone, microprocessor, LED controls
Device processed is powered.
In the present invention, first secondary windings of transformer T1 be multiple LED (illustrate three in figure, LED1,
LED2, LED3) driving voltage is provided, the second subprime winding of transformer T1 is microphone MIC, microcontroller, LED controls
Device 170 provides voltage, arranged by coil ratio by the first secondary windings and second subprime winding be optimized for MCU,
The efficiency of MIC, LED controller 170.For example when driving 3 LEDs, the conducting voltage of general each LED is 3V or so, then institute
The LED driving voltages for needing are 9V, and the minimum supply voltage of MIC, MCU, LED controller is 3V, then can be by the first secondary windings
3 are set to the coil ratio of second subprime winding:1.If second subprime winding output voltage (is now referred to through
Voltage after two voltage-regulating circuits 140) it is too high, then will waste efficiency, such as coil ratio is 3:2, then second subprime around
Group output voltage (now referring to the voltage after second voltage adjustment circuit 140) be 6V, MIC, MCU, LED controller
Supply voltage only need 3V, then the voltage difference of 6V-3V=3V will only be through linear regulator consumption, and now linear regulator disappears
The power of consumption is 3V and MIC, MCU, the product of the electric current sum of LED controller 170.It is therefore preferred that the first secondary windings and
The coil ratio of secondary stage winding be N.VL/Vs, wherein N be LED strip connection number, VL be LED conducting voltages, Vs be MIC,
The minimum operating voltage of MCU, LED controller 170.
General LED is main luminescent device, and the energy that energy ratio MIC, MCU of its consumption, LED controller are consumed is more (i.e.
The electric current that LED is consumed is more than the electric current sum that MIC, MCU, LED controller are consumed), therefore when LED is activated, it should it is excellent
First foundation is controlled as loop using the control of LED branch roads, now the minimum energy state needed for it of LED operation., whereas if this
When minimum operating voltage met with MIC, MCU, LED controller to adjust first switch K1 dutycycle maintain loop work, together
When leave work leeway for LED operation, then the voltage that first secondary windings of transformer T1 is provided for LED may be too high, needs
Additional electric pressure drop is adjusted in a linear fashion, and the power of so loss is more.
Relatively both implementations, if the voltage for additionally leaving surplus is identical, it is assumed that for VC, then the present invention preferentially with
LED current feedback adjusts foundation as loop, and the power of its excess loss is VC.ILED, and wherein VC is additionally to leave surplus
Voltage, ILED is LED current；And first switch K1 duty is adjusted on the basis of MIC, MCU, the operating voltage of LED controller 170
In the mode of ratio, the power of excess loss is VC.IB, and wherein VC is the voltage for additionally leaving surplus, and IB is MIC, MCU, LED control
The electric current sum of device processed 170.General ILED is more than IB.With designing technique progress and chip manufacturing process progress, long-term trend
See, IB may be further decreased.Therefore, in the present invention, preferentially using LED branch roads control as loop control foundation, i.e.,
The preferential dutycycle that first switch K1 is adjusted by feedback voltage FB.
In embodiments of the present invention, when LED is controlled shut-off, K2 is turned off, now voltage drop in detection resistance R1
Vanishing, therefore now loop control must be carried out as feedback control signal with the second DC voltage VB and open adjusting first
The dutycycle of K1 is closed, to maintain the second DC voltage VB as MIC, MCU, operating voltage is minimum needed for LED controller 170
Value.
Circuit diagrams of the Fig. 2 for the LED controller 170 in Fig. 1 in one embodiment.The LED controller includes
Decoder 171, error amplifier EA and pulse width modulator 172.
The decoder 171 receives the light controling signal CTRL, is controlled based on light controling signal output second
Signal ON processed.The first input end connection preset reference voltage of the error amplifier EA, the second input selectively connects
To feedback voltage FB or predetermined comparison voltages V2.When the second control signal ON is effective, its control second switch K2 leads
It is logical, when the second control signal ON is invalid, the K2 cut-offs of its control second switch.Simultaneously when the second control signal ON is effective
The feedback voltage FB is connected to into second input of the error amplifier EA, will when the second control signal ON is invalid
Predetermined comparison voltage V2 is connected to second input of the error amplifier EA.The pulse width modulator 172 is based on institute
The error amplification signal EAO for stating error amplifier EA outputs exports the first control signal CK1.
As shown in Figure 2, the LED controller 170 also includes generating circuit from reference voltage 173, and it includes being parallel to the
The first current source I1, the second current source I2 between two DC voltage VB and reference voltage output terminal VR, the 3rd current source I3, with
And second resistance Rr being series between reference voltage output terminal VR and earth terminal, wherein the generating circuit from reference voltage 173
Also include the 3rd switch K3 and the 4th switch K4 that connects with the second current source I2 and the 3rd current source I3 respectively.The decoder
171 also export the 3rd control signal D1 to control the 3rd switch K3 based on the light controling signal CTRL, and output the 4th is controlled
Signal D0 switchs K4 to control the 4th, so as to change the value of preset reference voltage VR.The LED controller 170 also includes
Comparison voltage produces circuit 174, and it includes 3rd resistor Rf1 and the 4th being parallel between the second DC voltage VB and earth terminal
Resistance Rf2, the voltage of the intermediate node between 3rd resistor Rf1 and the 4th resistance Rf2 is exactly the predetermined comparison voltage.It is described
LED controller 170 also includes the 5th switch KA1, the 6th switch KA2 and phase inverter INV1, and the 5th switch KA1 is connected to described anti-
Between second input of feedthrough voltage FB and the error amplifier EA.6th switch KA2 is connected to the predetermined comparison voltage
And second input of the error amplifier EA between.First control signal ON of the output of the decoder 171 is directly with the
The control end of five switch KA1 is connected, and is connected with the control end of the 6th switch KA2 by the phase inverter INV1.
When the second control signal ON is high level, the 5th switch KA1 conductings, the 6th switch KA2 disconnects, and now feeds back electricity
The selected negative input ends for being connected to error amplifier EA of pressure FB.Error amplifier compares feedback voltage FB and reference voltage VR,
Error amplification signal is produced, pulse width modulator (PWM) is controlled according to error amplification signal EAO to produce the first control signal GK1
The conducting dutycycle of first switch K1 in drawing 1.When feedback voltage FB is higher than reference voltage VR, EAO signals decline, and cause
The dutycycle of GK1 declines, and causes the first DC voltage VA in Fig. 1 to decline, and further results in LED current reduction, then feedback voltage
FB declines；When feedback voltage FB is less than reference voltage VR, EAO signals rise, and causing the dutycycle of GK1 increases, in causing Fig. 1
The first DC voltage VA increase, further result in LED current increase, then feedback voltage FB rise.Therefore negative-feedback is formed, this
When negative-feedback is stable, FB is equal to VR, and so as to form the current control to LED, now the electric current of LED is equal to VR/R1, wherein VR
For the magnitude of voltage of VR nodes, R1 is the resistance value of resistance R1.
When the second control signal ON is low level, the second DC voltage VB is after divider resistance Rf1, Rf2 partial pressure
Comparison voltage V2 is connected to the negative input end of error amplifier EA.When V2 is higher than VR, EAO voltages decline, and cause accounting for for GK1
Sky causes VB to decline than declining, and further results in V2 declines；When V2 is less than VR, EAO voltages rise, and cause accounting for for GK1 signals
Sky causes VB voltages to increase than increasing, and further results in V2 increases.Therefore negative-feedback is formed, when negative-feedback is stable, V2 voltages
Equal to VR voltages, formed to MIC, MCU, supply voltage (i.e. the second DC voltage) VB of LED controller 170 control.
" connection ", " connected " or " connecting " in the present invention etc. represent the word being electrically connected with all represent it is electrical indirect or
It is directly connected to.Described above has fully disclosed the specific embodiment of the present invention.It is pointed out that being familiar with the field
Scope of any change that technical staff is done to the specific embodiment of the present invention all without departing from claims of the present invention.
Correspondingly, the scope of claim of the invention is also not limited only to previous embodiment.
Claims (9)
1. a kind of acoustic control LED circuit, it is characterised in that it includes：
Rectification circuit, it is by AC rectification into direct current；
First switch；
Transformer, it includes main winding, the first secondary windings and second subprime winding, the first end of the main winding with
The output end of the rectification circuit is connected, and the second end of the main winding is connected by the first switch with earth terminal；
First voltage adjustment circuit, it is connected between the first end of the first secondary windings and the second end, straight for obtaining first
Stream voltage；
Second voltage adjustment circuit, it is connected between the first end of second subprime winding and the second end, straight for obtaining second
Stream voltage；
LED branch roads, its include be sequentially connected in series between the first DC voltage and earth terminal one or more LED, second open
Close and detection resistance, one end being connected with second switch of the detection resistance provides feedback voltage；
Microphone, for gathering audio signal；
Microcontroller, the audio signal output light controling signal gathered based on the microphone；
LED controller, receives the light controling signal and the feedback voltage of the microcontroller output, and exports the first control
Signal to the first switch controlling the continuous on or off of first switch, export the second control signal to second switch with
The continuous on or off of control second switch,
Wherein microphone, microcontroller and LED controller are by the second DC-voltage supply.
2. acoustic control LED circuit according to claim 1, it is characterised in that：The LED controller is based on the signal light control
The control signal of signal output second to control second switch on or off,
When second switch is turned on, the LED controller is controlled based on the feedback voltage and preset reference voltage adjustment first
The dutycycle of signal causes the feedback voltage to be equal to predetermined reference electricity to control the continuous on or off of first switch, finally
Pressure.
3. acoustic control LED circuit according to claim 2, it is characterised in that：When second switch ends, the LED controls
Device exports the first control signal of predetermined duty cycle to control the continuous on or off of first switch.
4. acoustic control LED circuit according to claim 2, it is characterised in that：The LED controller includes decoder, error
Amplifier and pulse width modulator,
The decoder receives the light controling signal, and based on the light controling signal the second control signal is exported,
The first input end of the error amplifier connects the preset reference voltage, and the second input is selectively connected to institute
Feedback voltage or predetermined comparison voltage are stated,
The second control signal for it is effective when, its control second switch conducting, the second control signal for it is invalid when, its control the
Two switch cut-offs,
Simultaneously the feedback voltage is connected to into the second input of the error amplifier when the second control signal is effective,
The predetermined comparison voltage is connected to the second input of the error amplifier when the second control signal is invalid,
The pulse width modulator exports the first control signal based on the error amplification signal of error amplifier output.
5. acoustic control LED circuit according to claim 4, it is characterised in that：
The LED controller also includes generating circuit from reference voltage, and it includes being parallel to the second DC voltage and reference voltage is defeated
The first current source, the second current source, the 3rd current source gone out between end, and be series at reference voltage output terminal and earth terminal it
Between second resistance, wherein
The generating circuit from reference voltage also includes source-series with the second current source and the 3rd electric current the 3rd switch respectively and the
Four switches,
The decoder also exports the 3rd control signal to control the 3rd switch based on the light controling signal, and output the 4th is controlled
Signal processed to control the 4th switch, so as to change the value of the preset reference voltage.
6. acoustic control LED circuit according to claim 4, it is characterised in that：
The LED controller also includes that comparison voltage produces circuit, and it includes being parallel between the second DC voltage and earth terminal
3rd resistor and the 4th resistance, the voltage of the intermediate node between 3rd resistor and the 4th resistance is exactly that the predetermined comparison is electric
Pressure.
7. acoustic control LED circuit according to claim 4, it is characterised in that：The LED controller also include the 5th switch,
6th switch and phase inverter,
5th switch is connected between the feedback voltage and the second input of the error amplifier,
6th switch is connected between the predetermined comparison voltage and the second input of the error amplifier,
Second control signal of decoder output is directly connected with the control end of the 5th switch, by the phase inverter and the
The control end of six switches is connected.
8. acoustic control LED circuit according to claim 1, it is characterised in that：
The rectification circuit includes the first inductance and first between rectifier bridge and two output ends for being series at the rectifier bridge
Electric capacity, wherein the intermediate node of the first inductance and the first electric capacity is the output end of the rectification circuit,
First voltage adjustment circuit includes being series between the first end of the first secondary windings and the second end the first diode and the
The intermediate node of two electric capacity, the first diode and the second electric capacity is the output end of the first voltage adjustment circuit；
Second voltage adjustment circuit include being series at the second diode between the first end of second subprime winding and the second end and
The intermediate node of the 3rd electric capacity, the second diode and the 3rd electric capacity is the output end of the second voltage adjustment circuit.
9. acoustic control LED circuit according to claim 1, it is characterised in that：First secondary windings and second subprime winding
Coil ratio is NVL/Vs, and wherein N is the number of series LED, and VL is LED conducting voltages, and Vs is microphone, microprocessor
The minimum operating voltage of device, LED controller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510963113.6A CN105491709B (en) | 2015-12-21 | 2015-12-21 | Sound control LED circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510963113.6A CN105491709B (en) | 2015-12-21 | 2015-12-21 | Sound control LED circuit |
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| Publication Number | Publication Date |
|---|---|
| CN105491709A CN105491709A (en) | 2016-04-13 |
| CN105491709B true CN105491709B (en) | 2017-04-26 |
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| CN201510963113.6A Active CN105491709B (en) | 2015-12-21 | 2015-12-21 | Sound control LED circuit |
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| CN106028501B (en) * | 2016-05-14 | 2018-04-03 | 深圳市集贤科技有限公司 | A kind of acoustic control flashlight and its on-off circuit |
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| CN203167362U (en) * | 2013-03-26 | 2013-08-28 | 武汉伯乐莱光电产业有限公司 | LED bulb lamp applied to sound/light control switch |
| CN103561513B (en) * | 2013-10-29 | 2015-10-21 | 上海明泰照明电器有限公司 | LED light source Wireless Light modulating system and method for operation thereof |
| CN205265954U (en) * | 2015-12-21 | 2016-05-25 | 无锡中感微电子股份有限公司 | Acoustic control LED circuit |
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2015
- 2015-12-21 CN CN201510963113.6A patent/CN105491709B/en active Active
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