CN218888740U - Multi-switch control circuit and lamp control system - Google Patents
Multi-switch control circuit and lamp control system Download PDFInfo
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- CN218888740U CN218888740U CN202222494883.9U CN202222494883U CN218888740U CN 218888740 U CN218888740 U CN 218888740U CN 202222494883 U CN202222494883 U CN 202222494883U CN 218888740 U CN218888740 U CN 218888740U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/40—Control techniques providing energy savings, e.g. smart controller or presence detection
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Abstract
The utility model provides a many switch control circuit and lamps and lanterns control system, its technical scheme main points are many switch control circuit, including being used for being connected with lamps and lanterns with the main control module that control lamps and lanterns opened or close, still including being used for being connected with main control module with chip module, at least two trigger module that are used for independently triggering chip module respectively to main control module output switching signal, two trigger module is connected with chip module respectively, in addition, still discloses a lamps and lanterns control system, including above-mentioned many switch control circuit, this scheme can realize simplifying many switch control circuit's structure, optimizes the wiring, reduces the quantity of wiring quantity and non-terminal switch, reduces circuit cost and the later maintenance degree of difficulty.
Description
Technical Field
The utility model relates to an intelligence switch field especially relates to a many on-off control circuit and lamps and lanterns control system.
Background
Along with the improvement gradually of standard of living, demand to intelligent house is bigger and bigger, if put through the multiple switch with electrical apparatus, the multiple switch all can control with opening and closing of electrical apparatus, user of service can trigger corresponding switch circuit from the position of difference, thereby start or close electrical apparatus, improve the convenience, present common way is to establish low pressure return circuit and parallelly connected a plurality of mechanical type switches in low pressure return circuit, break-make through low pressure return circuit control high voltage circuit, but this way need use a large amount of mechanical switch, the complicated volume of using of wiring is big, lead to circuit cost higher, the later maintenance degree of difficulty is big.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a many on-off control circuit and lamps and lanterns control system realizes simplifying many on-off control circuit's structure, optimizes the wiring, reduces wiring quantity and non-terminal switch's quantity, reduces the circuit cost and the later maintenance degree of difficulty.
In order to achieve the above object, the present invention provides the following technical solutions:
the multi-switch control circuit comprises a main control module, a chip module and at least two trigger modules, wherein the main control module is used for being connected with a lamp to control the lamp to be turned on or turned off, the chip module is used for being connected with the main control module to output a switch signal to the main control module, the at least two trigger modules are used for independently triggering the chip module respectively, and the two trigger modules are connected with the chip module respectively.
Further, the voltage input end of the trigger module is connected with the main control module, the voltage output end of the trigger module is grounded, and the signal output end of the trigger module is connected with the chip module.
The trigger module comprises a trigger element, a first resistor and a second resistor; the two ends of the first resistor are respectively connected with the voltage input end of the trigger element and the main control module, and the two ends of the second resistor are respectively connected with the signal output end of the trigger element and the chip module.
The device is further provided with a voltage stabilizing module; the voltage input end of the voltage stabilizing module is connected with the main control module, and the voltage output end of the voltage stabilizing module is connected with the voltage input end of the chip module.
Further, the voltage stabilizing module comprises a three-terminal voltage stabilizer; the voltage input end of the three-terminal voltage stabilizer is connected with the main control module, the voltage output end of the three-terminal voltage stabilizer is connected with the voltage input end of the chip module, and the grounding end of the three-terminal voltage stabilizer is grounded.
In a further setting, the voltage stabilizing module further comprises a third resistor, one end of the third resistor is connected with the input end of the three-terminal voltage stabilizer, and the other end of the third resistor is connected with the main control module.
Further, the voltage stabilizing module further comprises a first capacitor; one end of the first capacitor is connected with the voltage input end of the three-terminal voltage stabilizer, and the other end of the first capacitor is grounded.
Further, the voltage stabilizing module further comprises a second capacitor; one end of the second capacitor is connected with the voltage output end of the three-terminal voltage stabilizer, and the other end of the second capacitor is grounded.
The main control module comprises a switch tube, a fourth resistor and a fifth resistor;
one end of the fourth resistor is connected with the signal output end of the chip module, the other end of the fourth resistor is connected with one end of the fifth resistor, and the other end of the fourth resistor is also connected with the grid electrode of the switching tube;
the other end of the fifth resistor is grounded;
the source electrode of the switch tube is grounded, and the drain electrode of the switch tube is used for being connected with a lamp.
The lamp control system comprises a lamp and the multi-switch control circuit, wherein the lamp is connected with the main control module, and the main control module controls the lamp to be turned on or turned off through any trigger module.
Compared with the prior art, the utility model discloses a scheme has following advantage:
1. the utility model relates to an among the many switch control circuit, trigger module mutually independent, and be connected with the chip module respectively, every trigger module all can trigger the chip module, make chip module output switching signal, the inside output signal according to the chip module that opens circuit of host system, thereby control lamps and lanterns are opened or are closed, make opening or the relation of multiple switch homoenergetic control lamps and lanterns, simplify many switch control circuit's structure, optimize the wiring, reduce the quantity of wiring quantity and non-terminal switch, reduce the circuit cost and the later maintenance degree of difficulty.
2. The utility model relates to an among the lamps and lanterns control system, many switch control circuit are connected to lamps and lanterns, arrange trigger module on different spatial position, make the operator can follow different local control lamps and lanterns and open or close, improve and use the convenience.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a schematic diagram illustrating a structural connection of a multi-switch control circuit according to an embodiment of the present invention;
fig. 2 is a circuit diagram of a multi-switch control circuit in an embodiment of the present invention;
fig. 3 is a circuit diagram of a main control module according to an embodiment of the present invention;
fig. 4 is a schematic diagram of a chip module according to an embodiment of the present invention;
fig. 5 is a circuit diagram of a first trigger module according to an embodiment of the present invention;
fig. 6 is a circuit diagram of a second trigger module according to an embodiment of the present invention;
fig. 7 is a circuit diagram of a voltage regulator module according to an embodiment of the present invention.
Reference numerals: 1. a main control module; 2. a chip module; 3. a triggering module; 4. and a voltage stabilizing module.
Detailed Description
Reference will now be made in detail to the embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary only for explaining the present invention, and should not be construed as limiting the present invention.
As shown in fig. 1-2, the utility model provides a multi-switch control circuit, including being used for being connected with lamps and lanterns with the main control module 1 that control lamps and lanterns opened or closed, still including being used for being connected with main control module 1 with the chip module 2 of main control module 1 output switching signal, at least two trigger module 3 that are used for independently triggering chip module 2 respectively, two trigger module 3 is connected with chip module 2 respectively.
The implementation principle is that the trigger modules 3 are mutually independent and are respectively connected with the chip modules 2, each trigger module 3 can trigger the chip module 2, the chip modules 2 output switch signals, the internal circuit breaking of the main control module 1 forms a path according to the output signals of the chip modules 2, and therefore the lamps are controlled to be turned on or turned off, the multi-way switches can control the turning on or off of the lamps, the structure of the multi-switch control circuit is simplified, wiring is optimized, the number of wiring amount and non-terminal switches is reduced, and the circuit cost and the later maintenance difficulty are reduced.
In the embodiment, the lamp can be applied to electric appliances such as an electric fan and a water dispenser besides the lamp.
As shown in fig. 4, the chip module 2 is provided with a data receiving interface for serial communication, the data receiving interface is used for data connection with an external device to receive a control program written by the external device, and a research and development worker can access the data receiving interface to a computer to burn the corresponding control program into the chip module 2, so that the chip module 2 can output a switch control signal based on the burned control program and the received sensing signal.
The chip module 2 is provided with a signal output end, the signal output end is connected with the main control module 1 so as to output a switch control signal to the main control module 1, wherein the switch control signal is used for enabling the inside of the main control module 1 to form a passage, and when the trigger module 3 is triggered by an object or a person, the main control module 1 starts the lamp through the chip module 2.
Eight external terminals of the chip module 2 are provided, namely pins 1, pins 2, pins 3, pins 4, pins 5, pins 6, pins 7 and pins 8.
In specific application, the signal output ends of the two trigger modules 3 are respectively connected with pins 6 and 7, and the pin 8 of the chip module 2 is grounded.
The device also comprises a power supply module; the power supply module, the main control module 1 and the lamp are sequentially connected, and when the open circuit in the main control module 1 becomes a closed circuit, the power supply module, the main control module 1 and the lamp form a closed loop to turn on the lamp.
The chip module 2 is connected with the main control module 1 and shares a power supply module.
In specific application, the voltage input end of the trigger module 3 is connected with the main control module 1, the voltage output end of the trigger module 3 is grounded, and the signal output end of the trigger module 3 is connected with the chip module 2.
As shown in fig. 5 and fig. 6, the voltage input end of the trigger module 3 is connected to the main control module 1, and shares a power supply with the main control module 1, and in addition, the voltage input end of the trigger module 3 may be externally connected to a power supply, which is not limited in this embodiment.
The trigger module 3 has a specific structure that the trigger module 3 comprises a trigger element, a first resistor and a second resistor; the two ends of the first resistor are respectively connected with the voltage input end of the trigger element and the main control module 1, and the two ends of the second resistor are respectively connected with the signal output end of the trigger element and the chip module 2.
The first resistor and the second resistor play roles in protecting the circuit and filtering the circuit.
The trigger element is provided with a working indicator light.
And a pin 1, a pin 2 and a pin 3 of the trigger element are respectively provided with a voltage input end, a voltage output end and a signal output end.
Preferably, the trigger element is an infrared sensor.
In this embodiment, parts such as an acoustic control sensor and a light sensor are also used for replacement, which is not limited to this embodiment.
In specific application, one of the trigger modules 3 includes a trigger element SW1, a first resistor R6, and a second resistor R5, a pin 3 of the trigger element SW1 is connected with one end of the first resistor R6, the other end of the first resistor R6 is connected with the main control module 1, a pin 1 of the trigger element SW1 is connected with one end of the second resistor R5, the other end of the second resistor R5 is connected with the chip module 2, and a pin 2 of the trigger element SW1 is grounded.
The other trigger module 3 comprises a trigger element SW2, a first resistor R7 and a second resistor R8, wherein a pin 3 of the trigger element SW2 is connected with one end of the first resistor R7, the other end of the first resistor R7 is connected with the main control module 1, a pin 1 of the trigger element SW2 is connected with one end of the second resistor R8, the other end of the second resistor R8 is connected with the chip module 2, and a pin 2 of the trigger element SW2 is grounded.
The specific number of the trigger modules 3 may be two, or three, four, or the like, which is not limited in this embodiment.
Further improved, the device also comprises a voltage stabilizing module 4; the voltage input end of the voltage stabilizing module 4 is connected with the main control module 1, and the voltage output end of the voltage stabilizing module 4 is connected with the voltage input end of the chip module 2.
Specifically, the voltage output terminal of the voltage stabilization module 4 is connected to pin 1 of the chip module 2.
As shown in fig. 7, the voltage regulation module 4 has a specific structure that the voltage regulation module 4 includes a three-terminal regulator U1; the voltage input end of the three-terminal regulator U1 is connected with the main control module 1, the voltage output end of the three-terminal regulator U1 is connected with the voltage input end of the chip module 2, and the grounding end of the three-terminal regulator U1 is grounded.
In some embodiments, the voltage stabilizing module 4 further includes a third resistor R3, one end of the third resistor R3 is connected to the input end of the three-terminal regulator U1, and the other end of the third resistor R3 is connected to the main control module 1.
In some embodiments, the voltage stabilizing module 4 further includes a first capacitor C3; one end of the first capacitor C3 is connected with the voltage input end of the three-terminal voltage regulator U1, and the other end of the first capacitor C3 is grounded.
In some embodiments, the voltage stabilizing module 4 further includes a second capacitor C4; one end of the second capacitor C4 is connected with the voltage output end of the three-terminal voltage regulator U1, and the other end of the second capacitor C4 is grounded.
The first resistor R3 plays a role in protecting the three-terminal voltage regulator U1; the model of three-terminal regulator U1 is 78L05, and three-terminal regulator U1 is the output voltage of 5V with the external voltage VCC that inputs. The input end is provided with a first capacitor C3, the first capacitor C3 is equivalent to a smoothing capacitor, a filtering effect is achieved, and the stability of the three-terminal regulator U1 can be improved; the output end is provided with a second capacitor C4, the second capacitor C4 is an energy storage device for providing electric energy for other components, the output of the three-terminal voltage regulator U1 can be homogenized, and the load requirement is reduced.
The pin 1, the pin 2 and the pin 3 of the three-terminal regulator U1 are respectively a voltage input end, a grounding end and a voltage output end.
As shown in fig. 3, the main control module 1 has a specific structure that the main control module 1 includes a switching tube Q1, a fourth resistor R4, and a fifth resistor R2;
one end of the fourth resistor R4 is connected with a signal output end of the chip module 2, the other end of the fourth resistor R4 is connected with one end of the fifth resistor R2, and the other end of the fourth resistor R4 is further connected with a gate of the switching tube Q1;
the other end of the fifth resistor R2 is grounded;
the source electrode of the switch tube Q1 is grounded, and the drain electrode of the switch tube Q1 is used for being connected with a lamp.
Specifically, the main control module 1 comprises a switching tube Q1, a fourth resistor R4 and a fifth resistor R2, one end of the fourth resistor R4 is connected with a pin 5 of a signal output end of the chip module 2, the other end of the fourth resistor R4 is connected with one end of the fifth resistor R2, the other end of the fourth resistor R4 is further connected with a gate of the switching tube Q1, and the other end of the fifth resistor R2 is grounded; the source electrode of the switching tube Q1 is grounded, and the drain electrode of the switching tube Q1 is used for being connected with a lamp; when receiving the switch control signal, the pin 5 of the signal output end of the chip module 2 outputs a high level signal, the current direction of the switch tube Q1 is D → S, the switch tube Q1 is conducted, and the lamp is turned on. Wherein D is the drain electrode of the switch tube, and S is the source electrode of the switch tube.
The LED + and the LED-end on the main control module 1 are respectively connected to the anode and the cathode of the lamp, and the LED + is the power-off end of the voltage stabilizing module 4 and the trigger module 3.
The main control module 1 further comprises a diode D1 and a third capacitor C2; and the third capacitor C2 and the diode D1 are respectively connected with the lamp in parallel and used for circuit filtering.
The main control module 1 further comprises an inductor LF1 and a sixth capacitor C1; and the inductor LF1 and the sixth capacitor C1 are respectively connected with the lamp in parallel for circuit filtering.
The main control module 1 further comprises a seventh resistor; one end of the seventh resistor R1 is connected with the grid electrode of the switching tube Q1, and the seventh resistor R1 is used for being connected with the anode of the lamp.
The main control module 1 further comprises a diode D2; the negative electrode of the diode D2 is connected with the grid electrode of the switch tube Q1, and the positive electrode of the diode D2 is grounded.
In specific use, the voltage input end of the main control module 1 is used for being conducted with a direct current power supply, and in addition, a transformer and a rectifier are arranged at the voltage output end of the main control module 1, so that the main control module 1 can be supplied with power by using an alternating current power supply.
In some embodiments, the lighting device further comprises an indicator light module, the indicator light module includes one light emitting diode LED1 or a plurality of light emitting diodes LED1 connected in series, a voltage input end of the one light emitting diode LED1 or the plurality of light emitting diodes LED1 connected in series is connected with a voltage output end of the main control module 1, a voltage output end of the one light emitting diode LED1 or the plurality of light emitting diodes LED1 connected in series is connected with a voltage output end of the trigger module 3, and the voltage output ends are commonly grounded, in practical applications, the trigger module 3 is powered on by observing the light emitting of the light emitting diode LED1, and can be used normally, in addition, whether the trigger module 3 is damaged or not can be quickly judged through the light emitting diode LED1, if the light emitting diode LED1 emits light, the trigger module 3 cannot control the LED lamp to be turned on, and the trigger module 3 has the possibility of damage.
The indicator light module also comprises one or more resistors R11 connected in series, and the one or more resistors R11 connected in series are connected in series with one indicator light or a plurality of light-emitting diodes LED1 connected in series to protect the light-emitting diodes LED1.
In the above embodiment, the voltage input terminal of one light emitting diode LED1 or a plurality of light emitting diodes LED1 connected in series may also be connected to an external power supply, which is not limited in this embodiment.
The quantity phase-match of pilot lamp module and trigger module 3, the pilot lamp module is equipped with at least two, and the voltage output end of every pilot lamp module is connected with the voltage output end of the trigger module 3 who corresponds.
As shown in fig. 1-7, the utility model also provides a lamps and lanterns control system, including lamps and lanterns, still include as above many on-off control circuit, lamps and lanterns with host system 1 connects, host system 1 is through arbitrary trigger module 3 control lamps and lanterns are opened or are closed.
In specific application, the LED lamps are selected for the lamps, the lamps are connected with the multi-switch control circuit, and the trigger module 3 is arranged at different spatial positions, so that an operator can control the lamps to be turned on or off from different places, and the use convenience is improved.
The specific principle is that power is supplied to the chip module 2 (CPU) through the three-terminal regulator 78L05, the chip module 2 receives an output signal of any trigger module 3, when a light-on instruction is sent out by receiving any trigger element, the chip module 2 transmits a light-on signal through the 5 pins and the fourth resistor R4 to force the switch tube Q1 (MOS tube) to be conducted, the D/S is in a conducting state, the load LED lamp is successfully grounded, and the light-on is realized, otherwise, the light is disconnected and turned off.
In specific application, the LED lamp can be selected from one LED lamp, and also can be selected from a plurality of LED lamps connected in series to form an LED lamp group, one LED lamp group is carried on the main control module 1, and the plurality of LED lamps are synchronously turned on or turned off.
Based on the modules of the foregoing embodiments, a multi-switch control circuit in a specific application scenario is provided below, and a circuit diagram thereof is shown in fig. 2.
In the circuit diagram shown in fig. 2, the circuit description of each module refers to the explanation of the corresponding embodiment described above. By adopting the switching circuit of the trigger module 3, the following scheme can be realized:
if lamps and lanterns that are used for illuminating showpiece are arranged to every check on the show case, different lamps and lanterns are established ties in proper order, carry on the output at host system 1 after establishing ties, and a plurality of trigger module 3 arrange on the different spatial position of show case, when personnel are close to the show case, and stop at a certain position, trigger module 3 through triggering to close on makes all lamps and lanterns on the show case open, throw light on the showpiece, a plurality of trigger module 3's setting, make personnel can both trigger the lamps and lanterns illumination no matter stop on a certain position, can directly move a certain showpiece and directly watch, need not to move to specific position and open after the illumination before moving to a certain showpiece again, improve convenience and experience, strengthen humanized design, and the same reason, lamps and lanterns also can select for use, a plurality of trigger module 3 control a lamps and lanterns open the illumination, supply personnel to start lamps and lanterns from different vacancy positions.
In addition, each grid of the showcase can be additionally provided with a corresponding grid door, different trigger modules 3 sense the corresponding grid doors, the grid doors are opened to generate relative displacement, and the trigger modules 3 are triggered to send out signals.
If carry on the bedside lamp in the bedroom on the voltage output of host system 1, arrange different trigger module 3 respectively on different spatial position such as bedroom doorway department, bedside cupboard, thereby the user can control the bedside lamp on the different spatial position of bedroom and open, improves the intelligent degree of house, improves daily life's living happiness.
If carry on the bathroom in bathroom on host system 1's voltage output, arrange different trigger module 3 respectively outside the bathroom and on different spatial position such as in the bathroom, the user can thereby control the bathroom and open on other different spatial position inside and outside the bathroom, improves the convenience at home, provides comfortable use and experiences.
Above-mentioned trigger module 3 adopts the mode that infrared range finding felt to respond to external information, replaces the manual traditional induction mode of pressing mechanical type switch, improves degree of automation, and relative light sense, sensing modes such as sound sense, infrared range finding feel have simple structure, convenient change, advantage such as with low costs, security height.
The foregoing is only a partial embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (10)
1. The multi-switch control circuit comprises a main control module which is used for being connected with a lamp to control the lamp to be turned on or turned off, and is characterized by further comprising a chip module which is used for being connected with the main control module to output a switching signal to the main control module, and at least two trigger modules which are used for independently triggering the chip module respectively, wherein the two trigger modules are connected with the chip module respectively.
2. The multi-switch control circuit of claim 1, wherein a voltage input terminal of the trigger module is connected to the main control module, a voltage output terminal of the trigger module is grounded, and a signal output terminal of the trigger module is connected to the chip module.
3. The multi-switch control circuit of claim 2, wherein the trigger module comprises a trigger element, a first resistor, a second resistor; the two ends of the first resistor are respectively connected with the voltage input end of the trigger element and the main control module, and the two ends of the second resistor are respectively connected with the signal output end of the trigger element and the chip module.
4. The multi-switch control circuit of claim 1, further comprising a voltage regulation module; the voltage input end of the voltage stabilizing module is connected with the main control module, and the voltage output end of the voltage stabilizing module is connected with the voltage input end of the chip module.
5. The multi-switch control circuit of claim 4, wherein the voltage stabilization module comprises a three-terminal regulator; the voltage input end of the three-terminal voltage stabilizer is connected with the main control module, the voltage output end of the three-terminal voltage stabilizer is connected with the voltage input end of the chip module, and the grounding end of the three-terminal voltage stabilizer is grounded.
6. The multi-switch control circuit according to claim 5, wherein the voltage regulation module further comprises a third resistor, one end of the third resistor is connected to the input terminal of the three-terminal regulator, and the other end of the third resistor is connected to the main control module.
7. The multi-switch control circuit of claim 6, wherein the voltage regulation module further comprises a first capacitor; one end of the first capacitor is connected with the voltage input end of the three-terminal voltage stabilizer, and the other end of the first capacitor is grounded.
8. The multi-switch control circuit of claim 7, wherein the voltage regulation module further comprises a second capacitor; one end of the second capacitor is connected with the voltage output end of the three-terminal voltage stabilizer, and the other end of the second capacitor is grounded.
9. The multi-switch control circuit of claim 1, wherein the main control module comprises a switch tube, a fourth resistor, and a fifth resistor;
one end of the fourth resistor is connected with a signal output end of the chip module, the other end of the fourth resistor is connected with one end of the fifth resistor, and the other end of the fourth resistor is further connected with a grid electrode of the switching tube;
the other end of the fifth resistor is grounded;
the source electrode of the switch tube is grounded, and the drain electrode of the switch tube is used for being connected with a lamp.
10. The lamp control system comprises a lamp and is characterized by further comprising the multi-switch control circuit as claimed in any one of claims 1 to 9, wherein the lamp is connected with the main control module, and the main control module controls the lamp to be turned on or turned off through any one of the trigger modules.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222494883.9U CN218888740U (en) | 2022-09-20 | 2022-09-20 | Multi-switch control circuit and lamp control system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222494883.9U CN218888740U (en) | 2022-09-20 | 2022-09-20 | Multi-switch control circuit and lamp control system |
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| CN218888740U true CN218888740U (en) | 2023-04-18 |
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| CN202222494883.9U Active CN218888740U (en) | 2022-09-20 | 2022-09-20 | Multi-switch control circuit and lamp control system |
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