CN102006699B - Police photo-taking light circuit - Google Patents
Police photo-taking light circuit Download PDFInfo
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- CN102006699B CN102006699B CN200910189852.9A CN200910189852A CN102006699B CN 102006699 B CN102006699 B CN 102006699B CN 200910189852 A CN200910189852 A CN 200910189852A CN 102006699 B CN102006699 B CN 102006699B
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Abstract
The invention relates to a police photo-taking light circuit. The police photo-taking light circuit comprises an interface port used for connecting a power supply, and a control circuit used for controlling an output port and used for controlling the power supply to supply power to a photo-taking light, wherein the control circuit is a singlechip control circuit; a switching circuit is also arranged between the power supply and the singlechip control circuit and is used for connecting or disconnecting power supply to the singlechip control circuit by the power supply; the switching circuit comprises a plurality of switches connected in parallel between the interface port of the power supply and the singlechip control circuit, and a plurality of protective resistors; and one end of each switch is connected with the interface port of the power supply and the other end is connected to a control pin of a singlechip in the singlechip control circuit respectively and is also grounded through a protective resistor to control the corresponding pin of the singlechip in a low-level state. The police photo-taking light circuit guarantees that the corresponding pin in the singlechip control circuit is in the low-level state and improves the reliability of the circuit.
Description
Technical field
The present invention relates to the photographic lamp circuit, more particularly, relate to a kind of police photo-taking light circuit.
Background technology
Police photographic lamp is matching used with camera, is used for the crime scene and takes finger mark.Police photographic lamp is provided with a plurality of different colours and can sends the light source of Different lightwave frequency range, when taking finger mark, according to shooting environmental, adopts the light source of different colours Different lightwave frequency range to shine, thereby obtains best finger mark image.Yet, existing police photo-taking light circuit is relatively poor aspect current stability, when running into the source current fluctuation, wild effect will appear in the optical frequency of light source and brightness, have influence on the shooting work of finger mark, resulting image is unsharp often just also, directly has influence on the detection work of case.So, need to improve police photo-taking light circuit.
Summary of the invention
The technical problem to be solved in the present invention is, and is relatively poor for the police photographic lamp current stability of prior art, affects the defectives such as image taking effect, and a kind of police photo-taking light circuit is provided.
The technical solution adopted for the present invention to solve the technical problems is as follows:
The invention provides a kind of police photo-taking light circuit, comprise: for the interface end that connects power supply, for the control output end mouth of control photographic lamp work and for controlling the control circuit of power supply to the photographic lamp power supply, described control circuit is single chip machine controlling circuit, between described power supply and described single chip machine controlling circuit, also be provided with switching circuit, be used for conducting or turn-off power supply to the power supply of described single chip machine controlling circuit; Wherein, described switching circuit comprises interface end and a plurality of switches between the described single chip machine controlling circuit and a plurality of protective resistance that is connected in described power supply in parallel, one end of each switch all links to each other with the interface end of described power supply, the other end of each switch connects respectively a control pin of single-chip microcomputer in the described single chip machine controlling circuit, and the other end of each switch is also by a protective resistance ground connection, is low level state in order to the respective pins of control single chip computer;
Be connected with power protecting circuit between the interface end of described power supply and switching circuit, described power protecting circuit comprises two protection chips, and carrying out voltage sampling, thereby control inputs voltage is between 3V ~ 4.25V.
In the described police photo-taking light circuit, also comprise: the ISP cd-rom recorder that is connected with described single chip machine controlling circuit is used for writing the control function to single chip machine controlling circuit.
In the described police photo-taking light circuit, described power protecting circuit comprises that model is the protection chip U2 of S-8261ABPMD-G3PT2, the protection chip U3 that model is SSG5N20V, and the interface end of described power supply comprises the anodal BAT+ of power input and power input negative pole BAT-; The pin 5 of protection chip U2 is connected by the anodal BAT+ of resistance R 9 and power input, consists of voltage sample circuit, and this pin 5 is connected with power input negative pole BAT-by capacitor C 10; The pin 6 access power input negative pole BAT-of protection chip U2; The pin two access power input negative pole BAT-of protection chip U3 is when power input voltage surpasses 4.25 volts or during less than 3 volts, power protecting circuit will compare by the voltage of its voltage sample circuit intercepting, in order to stablize input voltage.
In the described police photo-taking light circuit, also be provided with the charging serial ports at the input of described power protecting circuit, wherein, the anodic bonding of the positive pole of described charging serial ports and a diode, the negative electrode of this diode is connected with the positive pole of power supply; The negative pole of described charging serial ports is connected with described two protection chips respectively.
In the described police photo-taking light circuit, between described single chip machine controlling circuit and the control output end mouth for the work of control photographic lamp, be connected with voltage follower circuit, described voltage follower circuit comprises a plurality of Voltage-output branch roads, the input of each Voltage-output branch road connects a control output pin of single-chip microcomputer in the single chip machine controlling circuit, and the output of each Voltage-output branch road is connected to a port for the control output end mouth of control photographic lamp work, to be respectively applied to the versicolor lamp power supply in the photographic lamp.
In the described police photo-taking light circuit, described each Voltage-output branch road comprises: in sequential series at single chip machine controlling circuit with for divider resistance unit, switching tube and output resistance unit between the control output end mouth of control photographic lamp work, wherein, the divider resistance unit is used for controlling the large threshold voltage of described switching tube.
In the described police photo-taking light circuit, described divider resistance unit comprises the voltage sampling circuit that is made of at least two resistance series connection, one end of this voltage sampling circuit connects a control output pin of single-chip microcomputer in the described single chip machine controlling circuit, the other end ground connection of described voltage sampling circuit, the sampled voltage output of described voltage sampling circuit connects the grid of described switching tube, is used for the threshold voltage of this switching tube of control; The source ground of described switching tube; The drain electrode of described switching tube connects an end of described output resistance unit, and the other end of described output resistance unit connects for the control output end mouth of control photographic lamp work; Described output resistance unit comprises by a plurality of resistance circuit unit that consists of parallel with one another.
In the described police photo-taking light circuit, described output resistance unit comprises the circuit unit by 5 ~ 9 resistance formations parallel with one another.
In the described police photo-taking light circuit, adopting model in single chip machine controlling circuit is the single-chip microcomputer U1 of ATTINY2313, and the Voltage- output pin 12,13,14,15 of described single-chip microcomputer U1 connects respectively a Voltage-output branch road in the described voltage follower circuit; In the described switching circuit; the pin 9,7,5,3 of described single-chip microcomputer U1 connects respectively an end of a switch; and the contact that the pin of described single-chip microcomputer U1 links to each other with described switch is also by a protective resistance ground connection; when described switch disconnect and the pin 3,5 of single-chip microcomputer U1,7 when 9 voltage becomes high pressure conditions, then by described protective resistance with the pin 3,5 of single-chip microcomputer U1,7 and 9 high voltage induction ground wire.
Implement police photo-taking light circuit of the present invention, have following beneficial effect: in switching circuit, set up the protection branch road, can guarantee that the respective pins in the single chip machine controlling circuit is in low-pressure state, improve the reliability of circuit; And the invention provides a kind of police photo-taking light circuit with constant current function, it can solve the unsettled problem of electric current; In addition, the present invention also can by setting up the ISP cd-rom recorder, be convenient to the burning control program.
Description of drawings
The invention will be further described below in conjunction with drawings and Examples, in the accompanying drawing:
Fig. 1 is the schematic block circuit diagram of police photo-taking light circuit of the present invention;
Fig. 2 is the circuit theory diagrams of an embodiment of police photo-taking light circuit shown in Figure 1.
Embodiment
As illustrated in fig. 1 and 2, in an embodiment of police photo-taking light circuit of the present invention, it comprises: the interface end that connects power supply, be used for the control output end mouth of control photographic lamp work and be used for the control power supply to the control circuit of photographic lamp power supply, the inventive point of the technical program is, control circuit can be single chip machine controlling circuit 401, therefore can increase different peripheral circuits for it by different pins, strengthened the intelligent effect of this police photo-taking light circuit, between the interface end of power supply and single chip machine controlling circuit 401, also be provided with switching circuit 100, with conducting or the shutoff effect that is used for this switching circuit 100 of control, thereby further control power supply to the power supply of single chip machine controlling circuit 401; In addition, also be connected with ISP cd-rom recorder 300 with single chip machine controlling circuit 401, be used for writing the control function to single chip machine controlling circuit 401.The interface end of the power supply here is used for obtaining electric energy from power supply.The control output end mouth that is used for the work of control photographic lamp here comprises the control input end of a plurality of LED lamps, and the positive source input, and such as the interface J1 among Fig. 2, wherein, the power input in the interface end of the LEDV+ of interface J1 connection power supply is anodal.
Further, as shown in Figure 2, at work, ISP cd-rom recorder 300 is to single chip machine controlling circuit U1 burning lamp control function program, be the chip J2 of ISP6 such as adopting model, the pin 1,2,3 of this ISP cd-rom recorder, 4 and 5 respectively with the pin 18,20,19 of single chip machine controlling circuit U1,17 with is connected connection, its pin pin 6 ground connection.
Further, as shown in Figure 2, single chip machine controlling circuit 401 can adopt the multidigit chip microcontroller, is the single-chip microcomputer of ATTINY2313 such as model, in order to realize the control to the photographic lamp power supply.
Further; said switching circuit 100 can comprise interface end and a plurality of switches between the described single chip machine controlling circuit and a plurality of protective resistance that is connected in described power supply in parallel; one end of each switch all links to each other with the interface end of above-mentioned power supply; the other end of each switch connects respectively a control pin of single-chip microcomputer in the single chip machine controlling circuit; and the other end of each switch is also by a protective resistance ground connection, is low level state in order to the respective pins of control single chip computer.As shown in Figure 2, comprise four switch S 1, S2, S3 and S4 in the said switching circuit 100, and four resistance R 1, R2, R3, R4.Although what provide among Fig. 2 is the circuit form that adopts four toggle switchs, the circuit structure form that is not limited to four switches that the present invention protects.In switching circuit 100, be provided with 4 resistance R 1, R2, R3 and R4, as pull down resistor; 4 paralleling switch S1, S2, S3 and S4 of switching circuit 100 be connected power output end respectively with single chip machine controlling circuit 401 in the pin 3,5,7 of single-chip microcomputer U1 be connected with being connected, and tie point is connected respectively an end and is connected with resistance R 1, R2, R3 and R4, and the other end of resistance R 1, R2, R3 and R4 and connect rear ground connection; This protective resistance R1, R2, R3 and R4 be used for guaranteeing the pin 3,5 of single chip machine controlling circuit U1,7 and 9 voltage, guarantees that these pins keep low-voltage state all the time.It realizes principle: when the pin 3,5,7 of switch S 1, S2, S3 and S4 disconnection and single chip machine controlling circuit U1 becomes high pressure conditions with 9 voltages; then by the protective resistance that links to each other separately this voltage is introduced ground wire; to reduce pin 3,5,7 and 9 voltages of single chip machine controlling circuit U1, improve the reliability of circuit.
Further, be connected with power protecting circuit 200 between the interface end of power supply and switching circuit 100, power protecting circuit 200 comprises two protection chip U2 and U3, and carrying out voltage sampling, thereby control inputs voltage is between 3V ~ 4.25V.The interface end of the power supply here comprises the anodal BAT+ of power input and power input negative pole BAT-.Protecting chip U2 can adopt model here is the chip of S-8261ABPMD-G3PT2, and it is the chip of SSG5N20V that protection chip U3 can adopt model; The pin 5 of protection chip U2 is connected by the anodal BAT+ of resistance R 9 and power input, consists of voltage sample circuit, and this pin 5 is connected with power input negative pole BAT-by capacitor C 10; The pin 6 access power input negative pole BAT-of protection chip U2; The pin two access power input negative pole BAT-of protection chip U3.Like this, surpass 4.25 volts or during less than 3 volts, power protecting circuit 200 will compare by the voltage of its voltage sample circuit intercepting, stablizes input voltage when power input voltage.
As shown in Figure 2, the input of power protecting circuit 200 also is provided with charging serial ports CHARGE, wherein, the anodal CHARGE+ of charging serial ports and the anodic bonding of a diode D1, the negative electrode of this diode D1 is connected with the electrode input end of power supply, be used for preventing that electric current from oppositely pouring in down a chimney, and for fear of interference such as high-frequency noises, also pass through capacitor C 5 ground connection at the anodal CHARGE+ of charging serial ports; The negative pole CHARGE-of this charging serial ports is respectively with protection chip U2 be connected chip U3 to be connected.Take circuit shown in Figure 2 as example, the negative pole CHARGE-of charging serial ports connects the pin 6 of protection chip U3, and connects simultaneously the pin two of protection chip U2 by resistance R 10; The pin one of protection chip U3 links to each other with the pin 4 of protection chip U2, and the pin 3 of protection chip U3 links to each other with the pin 5 of protection chip U2, realizes utilizing simultaneously protection chip U2 and protection chip U3 that power supply is realized protection.
Further, between single chip machine controlling circuit and the control output end mouth (such as the interface J1 of Fig. 2) for the work of control photographic lamp, be connected with voltage follower circuit 400, voltage follower circuit 400 comprises and is connected to single chip machine controlling circuit and is used for a plurality of Voltage-output branch roads between the control output end mouth of control photographic lamp work, the input of each Voltage-output branch road connects a control output pin of single-chip microcomputer in the single chip machine controlling circuit, and the output of each Voltage-output branch road is connected to a port for the control output end mouth of control photographic lamp work, to be respectively applied to versicolor lamp in the photographic lamp such as red light, green light, the power supply of blue lamp and white lamp etc.Above-mentioned each Voltage-output branch road comprises: in sequential series at single chip machine controlling circuit 401 with for divider resistance unit, switching tube and output resistance unit between the control output end mouth of control photographic lamp work, wherein, the divider resistance unit is used for controlling the large threshold voltage of described switching tube.Wherein, the divider resistance unit comprises the voltage sampling circuit that is made of at least two resistance series connection, one end of this voltage sampling circuit connects a control output pin of single-chip microcomputer in the single chip machine controlling circuit 401, the other end ground connection of voltage sampling circuit, the sampled voltage output of voltage sampling circuit connects the grid of described switching tube, is used for the threshold voltage of this switching tube of control; The source ground of described switching tube, in addition, the drain electrode of described switching tube connects an end of above-mentioned output resistance unit, the other end of above-mentioned output resistance unit connects for the control output end mouth of control photographic lamp work, the output resistance unit here comprises by a plurality of resistance circuit unit that consists of parallel with one another, is used for the rated power of control output in the scope that requires.The output resistance unit here can be by 5 ~ 9 parallel with one another connecting to form of resistance, and guaranteeing to export rated power is 0.1W; But can carry out flexible to the quantity of resistance as the case may be.Below the specific embodiment that provides for Fig. 2 describe the annexation of single chip machine controlling circuit 401 and voltage follower circuit 400 in detail.
Adopting model in single chip machine controlling circuit 401 is the single-chip microcomputer U1 of ATTINY2313, the Voltage-output pin 12 of single-chip microcomputer U1 then, 13,14,15 corresponding Voltage-output branch roads that connect in the described voltage follower circuit separately, namely resistance R 5, R6, R7 and R8 are positioned at the Voltage-output branch road under it separately; Comprise the voltage sampling circuit that two divider resistance R5 and R50 consist of, the metal-oxide-semiconductor Q1 that plays on-off action such as the Voltage-output branch roads under, the resistance R 5, and the output resistance that is consisted of by resistance R 51 ~ R59; Divider resistance R5 and R50 are used for the grid threshold voltage of control metal-oxide-semiconductor Q1; The end of divider resistance R5 is connected the other end and is connected with the grid of metal-oxide-semiconductor Q1 with the pin 12 of single chip machine controlling circuit U1, divider resistance R50 is connected in parallel between the grid and source electrode of metal-oxide-semiconductor Q1, and with the tie point ground connection of the source electrode of metal-oxide-semiconductor Q1; Output resistance by 9 identical resistance (R51 ~ R59) form, guaranteeing to export rated power is 0.1W; One end of this output resistance is connected with the drain electrode of metal-oxide-semiconductor Q1, another termination load.The Voltage-output branch road of other branch roads is similar.
The present invention describes by several specific embodiments, above-mentioned Fig. 2 is given just for the circuit in four kinds of LED lamp control situations, it will be appreciated by those skilled in the art that, without departing from the present invention, can carry out various conversion and be equal to alternative the present invention, such as increasing by the kind of controlled LED lamp or quantity, then also should increase accordingly the switching branches in the open pipe circuit, and the Voltage-output branch road in the voltage follower circuit.In addition, for particular condition or concrete condition, can make various modifications to the present invention, and not depart from the scope of the present invention.Therefore, the present invention is not limited to disclosed specific embodiment, and should comprise the whole execution modes that fall in the claim scope of the present invention.
Claims (9)
1. police photo-taking light circuit, comprise: for the interface end that connects power supply, for the control output end mouth of control photographic lamp work and for controlling the control circuit of power supply to the photographic lamp power supply, it is characterized in that, described control circuit is single chip machine controlling circuit, between described power supply and described single chip machine controlling circuit, also be provided with switching circuit, be used for conducting or turn-off power supply to the power supply of described single chip machine controlling circuit; Wherein,
Described switching circuit comprises interface end and a plurality of switches between the described single chip machine controlling circuit and a plurality of protective resistance that is connected in described power supply in parallel, one end of each switch all links to each other with the interface end of described power supply, the other end of each switch connects respectively a control pin of single-chip microcomputer in the described single chip machine controlling circuit, and the other end of each switch is also by a protective resistance ground connection, is low level state in order to the respective pins of control single chip computer;
Be connected with power protecting circuit between the interface end of described power supply and switching circuit, described power protecting circuit comprises two protection chips, and carrying out voltage sampling, thereby control inputs voltage is between 3V ~ 4.25V.
2. police photo-taking light circuit according to claim 1 is characterized in that, also comprises: the ISP cd-rom recorder that is connected with described single chip machine controlling circuit is used for writing the control function to single chip machine controlling circuit.
3. police photo-taking light circuit according to claim 1, it is characterized in that, described power protecting circuit comprises that model is the protection chip U2 of S-8261ABPMD-G3PT2, the protection chip U3 that model is SSG5N20V, and the interface end of described power supply comprises the anodal BAT+ of power input and power input negative pole BAT-; The pin 5 of protection chip U2 is connected by the anodal BAT+ of resistance R 9 and power input, consists of voltage sample circuit, and this pin 5 is connected with power input negative pole BAT-by capacitor C 10; The pin 6 access power input negative pole BAT-of protection chip U2; The pin two access power input negative pole BAT-of protection chip U3 is when power input voltage surpasses 4.25 volts or during less than 3 volts, power protecting circuit will compare by the voltage of its voltage sample circuit intercepting, in order to stablize input voltage.
4. police photo-taking light circuit according to claim 1, it is characterized in that, also be provided with the charging serial ports at the input of described power protecting circuit, wherein, the anodic bonding of the positive pole of described charging serial ports and a diode, the negative electrode of this diode is connected with the electrode input end of power supply; The negative pole of described charging serial ports is connected with described two protection chips respectively.
5. police photo-taking light circuit according to claim 1, it is characterized in that, between described single chip machine controlling circuit and the control output end mouth for the work of control photographic lamp, be connected with voltage follower circuit, described voltage follower circuit comprises a plurality of Voltage-output branch roads, the input of each Voltage-output branch road connects a control output pin of single-chip microcomputer in the single chip machine controlling circuit, and the output of each Voltage-output branch road is connected to a port for the control output end mouth of control photographic lamp work, to be respectively applied to the versicolor lamp power supply in the photographic lamp.
6. police photo-taking light circuit according to claim 5, it is characterized in that, described each Voltage-output branch road comprises: in sequential series at single chip machine controlling circuit with for divider resistance unit, switching tube and output resistance unit between the control output end mouth of control photographic lamp work, wherein, the divider resistance unit is used for controlling the large threshold voltage of described switching tube.
7. police photo-taking light circuit according to claim 6, it is characterized in that, described divider resistance unit comprises the voltage sampling circuit that is made of at least two resistance series connection, one end of this voltage sampling circuit connects a control output pin of single-chip microcomputer in the described single chip machine controlling circuit, the other end ground connection of described voltage sampling circuit, the sampled voltage output of described voltage sampling circuit connects the grid of described switching tube, is used for the threshold voltage of this switching tube of control; The source ground of described switching tube; The drain electrode of described switching tube connects an end of described output resistance unit, and the other end of described output resistance unit connects for the control output end mouth of control photographic lamp work; Described output resistance unit comprises by a plurality of resistance circuit unit that consists of parallel with one another.
8. police photo-taking light circuit according to claim 7 is characterized in that, described output resistance unit comprises the circuit unit by 5 ~ 9 resistance formations parallel with one another.
9. police photo-taking light circuit according to claim 5 is characterized in that, adopting model in single chip machine controlling circuit is the single-chip microcomputer U1 of ATTINY2313, the Voltage-output pin 12 of described single-chip microcomputer U1,13,14,15 connect respectively a Voltage-output branch road in the described voltage follower circuit; In the described switching circuit; the pin 9,7,5,3 of described single-chip microcomputer U1 connects respectively an end of a switch; and the contact that the pin of described single-chip microcomputer U1 links to each other with described switch is also by a protective resistance ground connection; when described switch disconnect and the pin 3,5 of single-chip microcomputer U1,7 when 9 voltage becomes high pressure conditions, then by described protective resistance with the pin 3,5 of single-chip microcomputer U1,7 and 9 high voltage induction ground wire.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910189852.9A CN102006699B (en) | 2009-09-02 | 2009-09-02 | Police photo-taking light circuit |
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| Application Number | Priority Date | Filing Date | Title |
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| CN200910189852.9A CN102006699B (en) | 2009-09-02 | 2009-09-02 | Police photo-taking light circuit |
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| CN102006699A CN102006699A (en) | 2011-04-06 |
| CN102006699B true CN102006699B (en) | 2013-04-17 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP5635209B1 (en) * | 2013-04-19 | 2014-12-03 | 新電元工業株式会社 | Lamp driving power source and control method of lamp driving power source |
| CN104159358A (en) * | 2014-06-30 | 2014-11-19 | 青岛海信移动通信技术股份有限公司 | Electric torch drive circuit and mobile terminal |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2785304Y (en) * | 2005-04-11 | 2006-05-31 | 陈康周 | Multi-function changing lamp |
| US20080191642A1 (en) * | 2005-04-08 | 2008-08-14 | Wart Hog Ii Holding B.V. | Methods and Apparatus for Operating Groups of High-Power Leds |
| CN101305642A (en) * | 2005-11-08 | 2008-11-12 | 皇家飞利浦电子股份有限公司 | Circuit arrangement and method of driving a circuit arrangement |
| WO2009013675A1 (en) * | 2007-07-23 | 2009-01-29 | Nxp B.V. | Self-powered led bypass-switch configuration |
| US20090204239A1 (en) * | 2007-10-29 | 2009-08-13 | Netzel Sr Robert J | LED Light Controller System and Method |
-
2009
- 2009-09-02 CN CN200910189852.9A patent/CN102006699B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080191642A1 (en) * | 2005-04-08 | 2008-08-14 | Wart Hog Ii Holding B.V. | Methods and Apparatus for Operating Groups of High-Power Leds |
| CN2785304Y (en) * | 2005-04-11 | 2006-05-31 | 陈康周 | Multi-function changing lamp |
| CN101305642A (en) * | 2005-11-08 | 2008-11-12 | 皇家飞利浦电子股份有限公司 | Circuit arrangement and method of driving a circuit arrangement |
| WO2009013675A1 (en) * | 2007-07-23 | 2009-01-29 | Nxp B.V. | Self-powered led bypass-switch configuration |
| US20090204239A1 (en) * | 2007-10-29 | 2009-08-13 | Netzel Sr Robert J | LED Light Controller System and Method |
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