CN209882173U - Light control circuit for studio - Google Patents
Light control circuit for studio Download PDFInfo
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- CN209882173U CN209882173U CN201920093118.1U CN201920093118U CN209882173U CN 209882173 U CN209882173 U CN 209882173U CN 201920093118 U CN201920093118 U CN 201920093118U CN 209882173 U CN209882173 U CN 209882173U
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- unit circuit
- power supply
- resistor
- supply unit
- npn triode
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Abstract
The utility model discloses a light control circuit is used in studio, the switch is connected with first NPN triode base with the first electric capacity common port, first NPN triode collecting electrode is connected with the positive output of power supply unit circuit, first NPN triode collecting electrode is connected with PNP triode base, PNP triode projecting pole is connected with the positive output of power supply unit circuit, PNP triode collecting electrode is connected with the unijunction transistor projecting pole, the first base of unijunction transistor is connected with second NPN triode base, second NPN triode collecting electrode is connected with the positive output of power supply unit circuit, second NPN triode projecting pole is connected with the bidirectional thyristor control pole, bidirectional thyristor passes through the bulb and is connected with the positive output of power supply unit circuit, bidirectional thyristor is connected with the negative output of power supply unit circuit. The utility model has the advantages that the brightness of the bulb is changed by the control unit circuit, and when the switch is turned on, the bulb gradually becomes bright from dark; when the switch is closed, the lamp bulb gradually becomes dark from light.
Description
Technical Field
The utility model belongs to studio stage lighting field, concretely relates to light control circuit for studio.
Background
The studio is a place for creating space art by light and sound, and guests, presiders and operators work, make and perform in the studio. In the recording process of a studio, stage lighting is also called 'stage lighting', short for 'lighting', is one of stage art modeling means, and is mainly used for rendering atmosphere and enhancing stage effect.
In order to realize the lighting effect with different brightness degrees, the lighting needs to be regulated, and therefore, it is necessary to design a lighting control circuit for a studio.
SUMMERY OF THE UTILITY MODEL
For the technical defect who overcomes prior art existence, the utility model discloses a light control circuit for studio realizes the light and dark degree change of bulb through the control unit circuit.
The technical scheme adopted by the utility model for solving the technical problems is a light control circuit for a studio, which comprises a power supply unit circuit and a control unit circuit for supplying power to a bulb, wherein the power supply unit circuit is connected with the control unit circuit in a power supply way;
the control unit circuit comprises a bulb, a bidirectional thyristor, a first NPN triode, a second NPN triode, a PNP triode, a unijunction transistor, a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, a first adjustable resistor, a second adjustable resistor, a first capacitor, a second capacitor and a switch;
one end of a first resistor is connected with the positive output end of the power supply unit circuit, the other end of the first resistor is connected with the negative output end of the power supply unit circuit through a switch and a first capacitor in sequence, the common end of the switch and the first capacitor is connected with the base of a first NPN triode through a second resistor, the collector of the first NPN triode is connected with the positive output end of the power supply unit circuit through a first adjustable resistor, the emitter of the first NPN triode is grounded, the collector of the first NPN triode is connected with the base of a PNP triode, the emitter of the PNP triode is connected with the positive output end of the power supply unit circuit through a second adjustable resistor, the collector of the PNP triode is connected with the negative output end of the power supply unit circuit through a second capacitor, the collector of the PNP triode is connected with the emitter of a unijunction transistor, the second base of the unijunction transistor, the first base of the unijunction transistor is also connected with the base of a second NPN triode, the collector of the second NPN triode is connected with the positive output end of the power supply unit circuit through a third resistor, the emitter of the second NPN triode is connected with the control electrode of the bidirectional thyristor, the first main electrode of the bidirectional thyristor is connected with the positive output end of the power supply unit circuit through a bulb, and the second main electrode of the bidirectional thyristor is connected with the negative output end of the power supply unit circuit.
Preferably, the power supply unit circuit comprises alternating current, a transformer and a rectifier diode, the alternating current is connected with two ends of a first winding of the transformer, one end of a second winding of the transformer is connected with the positive pole of the rectifier diode, the other end of the second winding of the transformer is used as the negative output end of the power supply unit circuit, and the negative pole of the rectifier diode is used as the positive output end of the power supply unit circuit.
Preferably, the control unit circuit further includes a sixth resistor, one end of the sixth resistor is connected to the first adjustable resistor, and the other end of the sixth resistor is connected to the collector of the first NPN triode.
Preferably, the control unit circuit further includes a seventh resistor, one end of the seventh resistor is connected to the second adjustable resistor, and the other end of the seventh resistor is connected to the emitter of the PNP triode.
Preferably, the power supply unit circuit further includes a third capacitor, one end of the third capacitor is connected to the negative electrode of the rectifier diode, and the other end of the third capacitor is connected to the negative output end of the power supply unit circuit.
Preferably, the power supply unit circuit further comprises a breakdown diode, a cathode of the breakdown diode is connected with a cathode of the rectifier diode, and an anode of the breakdown diode is connected with a negative output end of the power supply unit circuit.
The utility model has the advantages that the components are few, the cost is low, the brightness of the bulb is changed by the control unit circuit, and when the switch is turned on, the bulb gradually becomes bright from dark; when the switch is turned off, the bulb gradually becomes dark from light, and the stage performance effect is enhanced.
Drawings
Fig. 1 is a schematic structural diagram of a specific embodiment of the control unit circuit of the present invention.
Fig. 2 is a schematic diagram of the present invention according to a specific embodiment.
Reference numerals: 1-power unit circuit, 2-control unit circuit, L-bulb, VS-triac, R1-first resistor, R2-second resistor, R3-third resistor, R4-fourth resistor, R5-fifth resistor, R6-sixth resistor, R7-seventh resistor, Q1-first NPN triode, Q2-second NPN triode, Q3-unijunction transistor, Q4-PNP triode, C1-first capacitor, C2-second capacitor, C3-third capacitor, RP 1-first variable resistor, RP 2-second variable resistor, S-switch, B-transformer, D1-rectifier diode, D2-breakdown diode, B1-first base, B2-second base, a 1-first main electrode, a 2-second main electrode.
Detailed Description
The embodiments of the present invention will be described in more detail below with reference to the accompanying drawings and reference numerals, so that those skilled in the art can implement the embodiments after studying the specification. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.
In the description of the present invention, it should be noted that the terms "upper", "horizontal", "inner", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, which are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted" and "connected" are to be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Example (b): referring to fig. 1, a light control circuit for a studio shown in fig. 2 includes a power supply unit circuit 1 and a control unit circuit 2 for supplying power to a bulb, wherein the power supply unit circuit 1 is connected with the control unit circuit 2 for supplying power;
the control unit circuit 2 comprises a bulb L, a bidirectional thyristor VS, a first NPN triode Q1, a second NPN triode Q2, a PNP triode Q4, a unijunction transistor Q3, a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, a fifth resistor R5, an adjustable resistor first RP1, an adjustable resistor second RP2, a first capacitor C1, a second capacitor C2 and a switch S;
one end of a first resistor R1 is connected with the positive output end of the power supply unit circuit 1, the other end of the first resistor R1 is connected with the negative output end of the power supply unit circuit 1 sequentially through a switch S and a first capacitor C1, the common end of the switch S and the first capacitor C1 is connected with the base of a first NPN triode Q1 through a second resistor R2, the collector of the first NPN triode Q1 is connected with the positive output end of the power supply unit circuit 1 through an adjustable resistor RP1, the emitter of the first NPN triode Q1 is grounded, the collector of the first NPN triode Q1 is connected with the base of a PNP triode Q4, the emitter of the PNP triode Q4 is connected with the positive output end of the power supply unit circuit 1 through an adjustable resistor II 2, the collector of the PNP triode Q4 is connected with the negative output end of the power supply unit circuit 1 through a second capacitor C2, the collector of the PNP triode Q4 is connected with the emitter of a unijunction transistor Q3, a first base B1 of the unijunction transistor Q3 is connected with the negative output end of the power supply unit circuit 1 through a fourth resistor R4, a first base B1 of the unijunction transistor Q3 is further connected with a base of a second NPN triode Q2, a collector of the second NPN triode Q2 is connected with the positive output end of the power supply unit circuit 1 through a third resistor R3, an emitter of the second NPN triode Q2 is connected with a control electrode of a triac VS, a first main electrode a1 of the triac VS is connected with the positive output end of the power supply unit circuit 1 through a bulb L, and a second main electrode a2 of the triac VS is connected with the negative output end of the power supply unit circuit 1.
In this embodiment, the power supply unit circuit 1 provides a working voltage for the control unit circuit 2, the control unit circuit 2 controls the brightness of the bulb L, and when the switch S is turned on, the bulb L gradually becomes bright from dark; when the switch S is closed, the bulb L gradually becomes dark from light.
The specific working principle of the control unit circuit 2 is as follows: when the switch S is closed, the output voltage of the power supply unit circuit 1 is applied to the base of the first NPN triode Q1 through the first resistor R1 and the second resistor R2, and the first capacitor C1 is charged through the first resistor R1, the voltage at the two ends of the first capacitor C1 gradually rises, the first NPN triode Q1 is gradually conducted and enters an amplification state, meanwhile, the collector voltage of the first NPN triode Q1 gradually falls, so that the base current of the PNP triode Q4 is gradually increased, the charging current of the second capacitor C2 is gradually increased, therefore, the oscillating frequency of the unijunction transistor Q3 gradually becomes higher, the second NPN transistor Q2 is turned on, the triac VS is turned on, the lamp L becomes brighter from dark, when the voltage at the two ends of the first capacitor C1 rises and the first NPN triode Q1 is saturated, the base current of the PNP triode Q4 is not controlled by the first NPN triode Q1, and the continuous adjustment of the light is realized by adjusting the resistance value of the adjustable resistor II RP 2;
when the switch S is turned off, the first capacitor C1 discharges through the second resistor R2 and the first NPN transistor Q1, the voltage across the first capacitor C1 gradually decreases, the first NPN transistor Q1 transits from the saturation state to the amplification state, and at this time, the collector current of the PNP transistor Q4 is controlled by the collector voltage of the first NPN transistor Q1 to gradually decrease, so that the oscillation frequency of the unijunction transistor Q3 decreases, and the light turns bright and dark, and when the first capacitor C1 discharges to the first transistor NPN Q1, the PNP transistor Q4 is turned off, the second NPN transistor Q2 is turned off, the triac VS is turned off, and the light bulb L is turned off.
An oscillator consisting of a second NPN triode Q2 and a unijunction transistor Q3 is used for exciting a bidirectional thyristor VS, and the oscillation frequency of the oscillator is controlled by the collector voltage of a PNP triode Q4 and an adjustable resistor II RP 2; adjusting the adjustable resistor RP1 to change the transition time of the light from bright to dark and from dark to bright;
one fixed line end of the first adjustable resistor RP1 is connected with the positive output end of the power supply unit circuit 1, the other fixed line end of the first adjustable resistor RP1 is connected with the collector of the first NPN triode Q1, and the sliding end of the first adjustable resistor RP1 is connected with the fixed line end connected with the positive output end of the power supply unit circuit 1;
one fixed line end of the second adjustable resistor RP2 is connected with the positive output end of the power supply unit circuit 1, the other fixed line end of the second adjustable resistor RP2 is connected with the emitter of the PNP triode Q4, and the sliding end of the second adjustable resistor RP2 is connected with the fixed line end connected with the positive output end of the power supply unit circuit 1.
Preferably, the power supply unit circuit 1 comprises an alternating current, a transformer B and a rectifier diode D1, the alternating current is connected with two ends of a first winding of the transformer B, one end of a second winding of the transformer B is connected with the positive pole of the rectifier diode D1, the other end of the second winding of the transformer B is used as the negative output end of the power supply unit circuit 1, and the negative pole of the rectifier diode D1 is used as the positive output end of the power supply unit circuit 1.
In another embodiment, which is an embodiment of the power supply unit circuit 1, the alternating current is converted into a low-voltage direct current voltage by the transformer B, and after the unnecessary alternating current component in the low-voltage direct current voltage is filtered by the rectifier diode D1, the control unit circuit 2 is directly powered.
Preferably, the control unit circuit 2 further includes a sixth resistor R6, one end of the sixth resistor R6 is connected to the adjustable resistor one RP1, and the other end thereof is connected to the collector of the first NPN transistor Q1.
In another embodiment, the sixth resistor R6 is connected in series between the first NPN transistor Q1 and the first adjustable resistor, and the sixth resistor R6 is connected to the fixed line terminal of the first adjustable resistor RP1, so as to prevent the first NPN transistor Q1 from being broken when the first adjustable resistor RP1 is adjusted to the minimum value.
Preferably, the control unit circuit 2 further includes a seventh resistor R7, one end of the seventh resistor R7 is connected to the adjustable resistor two RP2, and the other end thereof is connected to the emitter of the PNP triode Q4.
In another embodiment, the seventh resistor R7 is connected in series between the PNP transistor Q4 and the adjustable resistor two RP2, and the seventh resistor R7 is connected to the fixed line terminal of the adjustable resistor two RP2, and the seventh resistor R7 is designed to prevent the PNP transistor Q4 from being broken down when the adjustable resistor two RP2 is adjusted to the minimum value.
Preferably, the power supply unit circuit 1 further includes a third capacitor C3, one end of the third capacitor C3 is connected to the negative terminal of the rectifying diode D1, and the other end of the third capacitor C3 is connected to the negative output terminal of the power supply unit circuit 1.
In another embodiment, the third capacitor C3 is a filter circuit, and stabilizes the output voltage of the power supply unit circuit 1 against the influence of the power grid voltage fluctuation on the power supply voltage of the subsequent control unit circuit 2.
Preferably, the power supply unit circuit 1 further comprises a breakdown diode D2, a cathode of the breakdown diode D2 is connected with a cathode of the rectifier diode D1, and an anode of the breakdown diode D2 is connected with a negative output terminal of the power supply unit circuit 1.
In another embodiment, the breakdown diode D2 protects the control unit circuit 2 in the subsequent stage, and when the output of the power supply unit circuit 1 is too high, the breakdown diode D2 is turned on, and the control unit circuit 2 in the subsequent stage is short-circuited.
The foregoing is a more detailed description of the present invention, taken in conjunction with the specific preferred embodiments thereof, and it is not intended that the invention be limited to the specific embodiments thereof. To the utility model belongs to the technical field of the ordinary skilled person say, do not deviate from the utility model discloses a other embodiments that reach under the technical scheme all should be contained the utility model discloses a within the scope of protection.
Claims (6)
1. The utility model provides a light control circuit for studio which characterized in that: the lamp bulb power supply device comprises a power supply unit circuit and a control unit circuit, wherein the power supply unit circuit supplies power to the lamp bulb;
the control unit circuit comprises a bulb, a bidirectional thyristor, a first NPN triode, a second NPN triode, a PNP triode, a unijunction transistor, a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, a first adjustable resistor, a second adjustable resistor, a first capacitor, a second capacitor and a switch;
one end of a first resistor is connected with the positive output end of the power supply unit circuit, the other end of the first resistor is connected with the negative output end of the power supply unit circuit through a switch and a first capacitor in sequence, the common end of the switch and the first capacitor is connected with the base of a first NPN triode through a second resistor, the collector of the first NPN triode is connected with the positive output end of the power supply unit circuit through a first adjustable resistor, the emitter of the first NPN triode is grounded, the collector of the first NPN triode is connected with the base of a PNP triode, the emitter of the PNP triode is connected with the positive output end of the power supply unit circuit through a second adjustable resistor, the collector of the PNP triode is connected with the negative output end of the power supply unit circuit through a second capacitor, the collector of the PNP triode is connected with the emitter of a unijunction transistor, the second base of the unijunction transistor, the first base of the unijunction transistor is also connected with the base of a second NPN triode, the collector of the second NPN triode is connected with the positive output end of the power supply unit circuit through a third resistor, the emitter of the second NPN triode is connected with the control electrode of the bidirectional thyristor, the first main electrode of the bidirectional thyristor is connected with the positive output end of the power supply unit circuit through a bulb, and the second main electrode of the bidirectional thyristor is connected with the negative output end of the power supply unit circuit.
2. The light control circuit for a studio according to claim 1, wherein: the power supply unit circuit comprises alternating current, a transformer and a rectifier diode, the alternating current is connected with two ends of a first winding of the transformer, one end of a second winding of the transformer is connected with the positive electrode of the rectifier diode, the other end of the second winding of the transformer is used as the negative output end of the power supply unit circuit, and the negative electrode of the rectifier diode is used as the positive output end of the power supply unit circuit.
3. The light control circuit for a studio according to claim 1, wherein: the control unit circuit further comprises a sixth resistor, one end of the sixth resistor is connected with the first adjustable resistor, and the other end of the sixth resistor is connected with the collector of the first NPN triode.
4. The light control circuit for a studio according to claim 1, wherein: the control unit circuit further comprises a seventh resistor, one end of the seventh resistor is connected with the second adjustable resistor, and the other end of the seventh resistor is connected with an emitting electrode of the PNP triode.
5. The light control circuit for a studio according to claim 2, wherein: the power supply unit circuit further comprises a third capacitor, one end of the third capacitor is connected with the negative electrode of the rectifier diode, and the other end of the third capacitor is connected with the negative output end of the power supply unit circuit.
6. The light control circuit for a studio according to claim 2, wherein: the power supply unit circuit further comprises a breakdown diode, the cathode of the breakdown diode is connected with the cathode of the rectifier diode, and the anode of the breakdown diode is connected with the negative output end of the power supply unit circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920093118.1U CN209882173U (en) | 2019-01-21 | 2019-01-21 | Light control circuit for studio |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920093118.1U CN209882173U (en) | 2019-01-21 | 2019-01-21 | Light control circuit for studio |
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| Publication Number | Publication Date |
|---|---|
| CN209882173U true CN209882173U (en) | 2019-12-31 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920093118.1U Active CN209882173U (en) | 2019-01-21 | 2019-01-21 | Light control circuit for studio |
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| CN (1) | CN209882173U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112953492A (en) * | 2021-03-31 | 2021-06-11 | 李建明 | Micropower-driven alternating-current power supply electronic switching circuit and device |
-
2019
- 2019-01-21 CN CN201920093118.1U patent/CN209882173U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112953492A (en) * | 2021-03-31 | 2021-06-11 | 李建明 | Micropower-driven alternating-current power supply electronic switching circuit and device |
| CN112953492B (en) * | 2021-03-31 | 2022-06-24 | 李建明 | Micropower-driven alternating-current power supply electronic switching circuit and device |
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| CP01 | Change in the name or title of a patent holder |
Address after: 610000 no.168-1-235 Julong Road, Wuhou District, Chengdu, Sichuan Patentee after: Sichuan Huazhong Huiwu Technology Co.,Ltd. Address before: 610000 no.168-1-235 Julong Road, Wuhou District, Chengdu, Sichuan Patentee before: Sichuan Kaian Building Intelligent Engineering Co.,Ltd. |
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| CP01 | Change in the name or title of a patent holder |