A lighting control device based on infrared remote control

Abstract

This invention discloses a lighting control device based on infrared remote control, comprising a transmitter and a receiver. The transmitter rapidly converts user button presses into action command signals, which are then processed to generate infrared signals for transmission. The receiver receives these infrared signals and reconstructs them into action command signals for direct control of lighting equipment. This ingenious integration of infrared remote control functionality into a modular functional framework not only enables quick and convenient operation of specific functions but also eliminates the need for an IoT cloud platform, effectively saving user time. It also avoids command failures due to network issues, providing a smoother and more efficient user experience. Furthermore, this device is applicable to any specific control function, eliminating the need to design corresponding electronic circuits for each specific control function.

Description

Technical Field

[0001] This invention relates to the field of intelligent lighting control, and more particularly to a lighting control device based on infrared remote control. Background Technology

[0002] In the field of intelligent lighting control, achieving specific control functions typically relies on designing corresponding complex electronic circuits and issuing and controlling commands through an IoT cloud platform. This traditional approach is not only cumbersome and increases the difficulty of operation, but it also significantly reduces the smoothness of operation and the customer experience, especially for users unfamiliar with IoT cloud platforms.

[0003] Although infrared remote control technology is widely used in consumer products such as air conditioners and televisions and is relatively mature, there are few corresponding functional designs in the field of intelligent lighting control. There is a lack of simple, intelligent and highly integrated solutions, which affects the overall user experience. Summary of the Invention

[0004] Based on this, it is necessary to address the above problems by proposing an infrared remote control-based lighting control device. This device cleverly integrates infrared remote control functionality into the modular functional framework. This design not only enables quick and convenient operation of specific functions but also eliminates the need for using an IoT cloud platform, effectively saving user time. It also avoids command failures due to network issues, thus providing users with a smoother and more efficient user experience. Furthermore, this device can be used for any specific control function without requiring the design of corresponding electronic circuits for each specific control function.

[0005] To achieve the above objectives, the present invention provides a lighting control device based on infrared remote control, the device comprising a transmitter and a receiver;

[0006] The transmitter is used to generate an action command signal based on the user's key press, process the action command signal to obtain an infrared signal, and then transmit the infrared signal.

[0007] The receiver is used to receive the infrared signal and process the infrared signal to obtain the action command signal, which is used to control the lighting.

[0008] Optionally, the transmitter includes a matrix keypad control circuit, a main transmission control circuit, and an infrared remote control transmission circuit connected in sequence;

[0009] The matrix key control circuit is used to generate the action command signal based on the user's key press actions;

[0010] The transmitting main control circuit is used to receive the action command signal and modulate the action command signal to obtain a modulated square wave signal.

[0011] The infrared remote control transmitting circuit is used to receive the modulated square wave signal, convert the modulated square wave signal into the infrared signal, and transmit the infrared signal.

[0012] Optionally, the matrix keypad control circuit includes multiple keypad switches connected in a matrix.

[0013] Optionally, the multiple push-button switches connected in a matrix are nine push-button switches connected in a 3x3 matrix. The transmitting main control circuit includes a first main control chip, a first capacitor, a second capacitor, a third capacitor, a fourth capacitor, a fifth capacitor, a sixth capacitor, a seventh capacitor, a first resistor, a second resistor, a third resistor, a fourth resistor, and a ferrite bead.

[0014] The first pin of the first main control chip is connected to one end of the third capacitor; the seventh pin of the first main control chip is connected to one end of the fourth resistor and one end of the fifth capacitor; the ninth pin of the first main control chip is connected to one end of the ferrite bead and one end of the sixth capacitor; the twenty-third pin of the first main control chip is connected to one end of the seventh capacitor; the twenty-fourth pin of the first main control chip is connected to the other end of the seventh capacitor; the thirty-fourth pin of the first main control chip is connected to one end of the third resistor; the thirty-fifth pin of the first main control chip is connected to one end of the fourth capacitor; the thirty-sixth pin of the first main control chip is connected to the other end of the fourth capacitor; the thirty-seventh pin of the first main control chip is connected to one end of the second resistor; the forty-fourth pin of the first main control chip is connected to one end of the first resistor; the forty-seventh pin of the first main control chip is connected to one end of the second capacitor and one end of the first capacitor; and the forty-eighth pin of the first main control chip is connected to the other end of the second capacitor and the other end of the first capacitor.

[0015] The first, twenty-four, thirty-six, and forty-eighth pins of the first main control chip, as well as the other end of the fourth resistor, the other end of the ferrite bead, and the other end of the third resistor, are all connected to a DC power supply; the eighth, twenty-third, thirty-fifth, and forty-seventh pins of the first main control chip, as well as the other end of the third capacitor, the other end of the fifth capacitor, the other end of the sixth capacitor, the other end of the second resistor, and the other end of the first resistor are all grounded;

[0016] Pins 14 to 19 of the first main control chip are connected to the first row output, second row output, third row output, first column output, second column output, and third column output of the matrix keypad control circuit, respectively, and pin 11 of the first main control chip is connected to the infrared remote control transmitting circuit.

[0017] Optionally, the transmitting main control circuit further includes an eighth capacitor, a ninth capacitor, a tenth capacitor, an eleventh capacitor, a fifth resistor, a first crystal oscillator, and a second crystal oscillator;

[0018] One end of the first crystal oscillator is connected to one end of the eighth capacitor, and the other end of the first crystal oscillator is connected to one end of the ninth capacitor, and the other end of the ninth capacitor is connected to the other end of the eighth capacitor; the first end of the second crystal oscillator is connected to one end of the tenth capacitor and one end of the fifth resistor, the second end of the second crystal oscillator is connected to one end of the eleventh capacitor, the third end of the second crystal oscillator is connected to the other end of the eleventh capacitor and the other end of the fifth resistor, and the fourth end of the second crystal oscillator is connected to the other end of the tenth capacitor;

[0019] The other end of the eighth capacitor and the fourth end of the second crystal oscillator are both grounded;

[0020] The third to sixth pins of the first main control chip are respectively connected to one end of the first crystal oscillator, the other end of the first crystal oscillator, the first end of the second crystal oscillator, and the third end of the second crystal oscillator.

[0021] Optionally, the infrared remote control transmitting circuit includes a transistor, an infrared emitting diode, a sixth resistor, a seventh resistor, and an eighth resistor;

[0022] One end of the sixth resistor is connected to the anode of the infrared emitting diode, the cathode of the infrared emitting diode is connected to the collector of the transistor, the base of the transistor is connected to one end of the seventh resistor and one end of the eighth resistor, and the emitter of the transistor is connected to the other end of the eighth resistor.

[0023] The other end of the sixth resistor is connected to a DC power supply, and the emitter end of the transistor is grounded;

[0024] The eleventh pin of the first main control chip is connected to the other end of the seventh resistor.

[0025] Optionally, the receiver includes an infrared remote control receiving circuit and a receiving main control circuit connected in sequence;

[0026] The infrared remote control receiving circuit is used to receive the infrared signal and demodulate the infrared signal to obtain the baseband signal;

[0027] The receiving main control circuit is used to receive the baseband signal and perform restoration processing on the baseband signal to obtain the action command signal.

[0028] Optionally, the infrared remote control receiving circuit includes an infrared remote control receiving head, a ninth resistor, a tenth resistor, a twelfth capacitor, and a thirteenth capacitor;

[0029] The first end of the infrared remote control receiver head is connected to one end of the tenth resistor, the second end of the infrared remote control receiver head is connected to one end of the twelfth capacitor and one end of the thirteenth capacitor respectively, the third end of the infrared remote control receiver head is connected to the other end of the twelfth capacitor, the other end of the thirteenth capacitor and one end of the ninth resistor respectively, and the other end of the ninth resistor is connected to the other end of the tenth resistor.

[0030] The other end of the ninth resistor is connected to a DC power supply.

[0031] The first end of the infrared remote control receiver is connected to the receiving main control circuit.

[0032] Optionally, the receiving main control circuit includes a second main control chip, a fourteenth capacitor, a fifteenth capacitor, a sixteenth capacitor, a seventeenth capacitor, an eighteenth capacitor, a nineteenth capacitor, a twentieth capacitor, a twenty-first capacitor, an eleventh resistor, a twelfth resistor, a thirteenth resistor, a fourteenth resistor, a fifteenth resistor, and a sixteenth resistor;

[0033] The first pin of the second main control chip is connected to one end of the sixteenth capacitor; the seventh pin of the second main control chip is connected to one end of the fourteenth resistor and one end of the eighteenth capacitor; the ninth pin of the second main control chip is connected to one end of the nineteenth capacitor and one end of the twentieth capacitor; the tenth pin of the second main control chip is connected to one end of the fifteenth resistor and one end of the sixteenth resistor; the twenty-third pin of the second main control chip is connected to one end of the twenty-first capacitor; the twenty-fourth pin of the second main control chip is connected to the other end of the twenty-first capacitor; and the thirty-fourth pin of the second main control chip... The pin is connected to one end of the thirteenth resistor, the thirty-fifth pin of the second main control chip is connected to one end of the seventeenth capacitor, the thirty-sixth pin of the second main control chip is connected to the other end of the seventeenth capacitor, the thirty-seventh pin of the second main control chip is connected to one end of the eleventh resistor, the forty-fourth pin of the second main control chip is connected to one end of the twelfth resistor, the forty-seventh pin of the second main control chip is connected to one end of the fifteenth capacitor and one end of the fourteenth capacitor, and the forty-eighth pin of the second main control chip is connected to the other end of the fifteenth capacitor and the other end of the fourteenth capacitor.

[0034] The first, ninth, twenty-fourth, thirty-sixth, and forty-eighth pins of the second main control chip, as well as the other ends of the fourteenth, sixteenth, and thirteenth resistors, are all connected to a DC power supply; the eighth, twenty-third, thirty-fifth, and forty-seventh pins of the second main control chip, as well as the other ends of the sixteenth, eighteenth, and nineteenth capacitors, the fifteenth, eleventh, and twelfth resistors, are all grounded;

[0035] The eleventh pin of the second main control chip is connected to the first end of the infrared remote control receiver.

[0036] Optionally, the receiving main control circuit further includes a twenty-second capacitor, a twenty-third capacitor, and a third crystal oscillator;

[0037] One end of the third crystal oscillator is connected to one end of the 22nd capacitor, and the other end of the third crystal oscillator is connected to one end of the 23rd capacitor, and the other end of the 23rd capacitor is connected to the other end of the 22nd capacitor.

[0038] The other end of the 23rd capacitor and the other end of the 22nd capacitor are both grounded;

[0039] The third pin of the second main control chip is connected to the other end of the third crystal oscillator, and the fourth pin of the second main control chip is connected to one end of the third crystal oscillator.

[0040] The present invention provides the following advantages: The device includes a transmitter and a receiver. The transmitter generates an action command signal based on the user's key press, processes the action command signal to obtain an infrared signal, and then transmits the infrared signal. The receiver receives the infrared signal, processes it, and obtains the action command signal, which is used to control lighting. In other words, through the transmitter, the user's key press can be quickly converted into an action command signal, processed to generate an infrared signal for transmission, and the receiver is responsible for receiving these infrared signals and restoring them to an action command signal for direct control of lighting equipment. This ingenious integration of infrared remote control functionality into the modular functional framework not only achieves quick and convenient operation of specific functions but also eliminates the need for using an IoT cloud platform, effectively saving user time. It also avoids command failures due to network issues, providing users with a smoother and more efficient user experience. Furthermore, the device can be used for any specific control function without requiring the design of corresponding electronic circuits for each specific control function. Attached Figure Description

[0041] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0042] in:

[0043] Figure 1 This is a schematic diagram of a lighting control device based on infrared remote control in an embodiment of this application. Figure 1 ;

[0044] Figure 2 This is a schematic diagram of a lighting control device based on infrared remote control in an embodiment of this application. Figure 2 ;

[0045] Figure 3 This is a schematic diagram of the matrix keypad control circuit in an embodiment of this application;

[0046] Figure 4 This is a schematic diagram of the transmitting main control circuit in an embodiment of this application;

[0047] Figure 5 This is another schematic diagram of the transmitting main control circuit in an embodiment of this application;

[0048] Figure 6 This is a schematic diagram of the infrared remote control transmitting circuit in an embodiment of this application;

[0049] Figure 7 This is a schematic diagram of a lighting control device based on infrared remote control in an embodiment of this application. Figure 3 ;

[0050] Figure 8 This is a schematic diagram of a lighting control device based on infrared remote control in an embodiment of this application. Figure 4 ;

[0051] Figure 9 This is a schematic diagram of the infrared remote control receiving circuit in an embodiment of this application;

[0052] Figure 10 This is a schematic diagram of the receiving main control circuit in an embodiment of this application;

[0053] Figure 11 This is another schematic diagram of the receiving main control circuit in an embodiment of this application. Detailed Implementation

[0054] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0055] In the field of intelligent lighting control, achieving specific control functions typically relies on designing corresponding complex electronic circuits and issuing and controlling commands through an IoT cloud platform. This traditional approach is not only cumbersome and increases the difficulty of operation, but it also significantly reduces the smoothness of operation and the customer experience, especially for users unfamiliar with IoT cloud platforms.

[0056] Although infrared remote control technology is widely used in consumer products such as air conditioners and televisions and is relatively mature, there are few corresponding functional designs in the field of intelligent lighting control. There is a lack of simple, intelligent and highly integrated solutions, which affects the overall user experience.

[0057] To address the aforementioned issues, this application proposes an infrared remote control-based lighting control device. This device cleverly integrates infrared remote control functionality into a modular functional framework. This design not only enables quick and convenient operation of specific functions but also eliminates the need for using an IoT cloud platform, effectively saving user time. Furthermore, it avoids command failures due to network issues, providing users with a smoother and more efficient user experience. Moreover, this device is applicable to any specific control function without requiring the design of corresponding electronic circuits for each function. The specific implementation principle will be detailed in the following embodiments.

[0058] Please see Figure 1 This is a schematic diagram of a lighting control device based on infrared remote control in an embodiment of this application. Figure 1 The device includes a transmitter 110 and a receiver 120.

[0059] In one feasible implementation, transmitter 110 generates an action command signal based on the user's key press, processes the action command signal to obtain an infrared signal, and transmits the infrared signal; receiver 120 receives the infrared signal, processes the infrared signal to obtain an action command signal, and the action command signal is used to control the lighting.

[0060] It should be noted that the transmitter 110 and receiver 120 of this application need to be used together; the receiver 120 can be installed in or connected to the lighting equipment, while the transmitter 110 can be used independently for easy short-range remote control by the user.

[0061] In some embodiments, when a user needs to control the lighting equipment, the user can take the transmitter 110 and then, by pressing a button, cause the transmitter 110 to generate an action command signal. The action command signal is processed to obtain an infrared signal, which is then emitted. The receiver 120, which is installed in or connected to the lighting equipment, receives the infrared signal and immediately processes it to obtain an action command signal. The lighting equipment is then controlled via the action command signal.

[0062] The lighting control of the lighting equipment can be brightness control, color control, switch control, etc., and this application does not limit it.

[0063] In this embodiment, the user's button presses can be quickly converted into action command signals via the transmitter 110, and then processed to generate infrared signals for transmission. The receiver 120 is responsible for receiving these infrared signals and restoring them into action command signals for direct control of lighting equipment. This ingenious integration of infrared remote control functionality into the module's functional framework not only enables quick and convenient operation of specific functions but also eliminates the need for using an IoT cloud platform, effectively saving user time. It also avoids command failures due to network issues, thus providing users with a smoother and more efficient user experience. Furthermore, this device can be used for any specific control function without requiring the design of corresponding electronic circuits for each specific control function.

[0064] In addition, the solution proposed in this application has the following advantages: it eliminates the cost of building and maintaining an IoT platform and reduces the cost of customizing circuits for different functions; since it does not rely on network connections, it reduces the risk of network attacks and data leaks; because infrared remote control technology is mature and inexpensive, the solution is easier to promote to a wider market, allowing more users to experience the convenience of smart lighting; and it does not require users to register for a cloud platform or download an APP, so even elderly users who are not familiar with technology can easily get started.

[0065] based on Figure 1 Please see Figure 2 This is a schematic diagram of a lighting control device based on infrared remote control in an embodiment of this application. Figure 2 The transmitter 110 includes a matrix key control circuit 111, a main transmission control circuit 112, and an infrared remote control transmission circuit 113 connected in sequence.

[0066] In one feasible implementation, the matrix key control circuit 111 generates an action command signal based on the user's key press action; the transmitting main control circuit 112 receives the action command signal and modulates the action command signal to obtain a modulated square wave signal; the infrared remote control transmitting circuit 113 receives the modulated square wave signal, converts the modulated square wave signal into an infrared signal, and transmits the infrared signal.

[0067] In this embodiment, the transmitter 110 is decomposed into three modules: a matrix key control circuit 111, a main transmission control circuit 112, and an infrared remote control transmission circuit 113. The matrix key control circuit 111 is responsible for recognizing user key commands, the main transmission control circuit 112 is responsible for signal modulation, and the infrared remote control transmission circuit 113 is responsible for signal conversion and transmitting infrared signals, thereby improving the efficiency and reliability of the transmission function in infrared remote control.

[0068] Furthermore, the modular and layered structure significantly improves the scalability of the transmitter 110's structure and functions, making it more user-friendly.

[0069] In one feasible implementation, the matrix keypad control circuit 111 includes a plurality of keypad switches connected in a matrix.

[0070] The number of multiple button switches connected in a matrix can be set by the operator according to actual functional requirements, and there is no limit here.

[0071] In some embodiments, the multiple push-button switches connected in a matrix can be nine push-button switches connected in a 3x3 matrix or four push-button switches connected in a 2x2 matrix.

[0072] For example, taking nine push-button switches connected in a 3x3 matrix as an example, based on... Figure 2 Please see Figure 3 The diagram shows a matrix key control circuit in an embodiment of this application. SW1 to SW9 represent the first to ninth key switches, respectively; KEY_H1 to KEY_H3 represent the first to third row output terminals, respectively; and KEY_L1 to KEY_L3 represent the first to third column output terminals, respectively.

[0073] In this embodiment, the matrix key control circuit 111 uses a matrix key design by including multiple key switches connected in a matrix. This allows for the design of only one standard to process key signals. By combining different numbers and layouts of keys, various specific functions can be controlled, greatly simplifying the circuit design process.

[0074] Furthermore, by utilizing the matrix keypad control circuit 111, the product's functional scalability and user experience can be effectively improved.

[0075] Please continue reading. Figure 3 The multiple push-button switches connected in a matrix in this application are preferably nine push-button switches connected in a 3x3 matrix.

[0076] based on Figure 2 and Figure 3 Please see Figure 4 The diagram below is a schematic of the transmitting main control circuit in an embodiment of this application. The transmitting main control circuit 112 includes a first main control chip U2, a first capacitor C1, a second capacitor C4, a third capacitor C5, a fourth capacitor C6, a fifth capacitor C13, a sixth capacitor C19, a seventh capacitor C20, a first resistor R1, a second resistor R2, a third resistor R5, a fourth resistor R6, and a ferrite bead L1.

[0077] In one feasible implementation, the first pin of the first main control chip U2 is connected to one end of the third capacitor C5; the seventh pin of the first main control chip U2 is connected to one end of the fourth resistor R6 and one end of the fifth capacitor C13; the ninth pin of the first main control chip U2 is connected to one end of the ferrite bead L1 and one end of the sixth capacitor C19; the twenty-third pin of the first main control chip U2 is connected to one end of the seventh capacitor C20; the twenty-fourth pin of the first main control chip U2 is connected to the other end of the seventh capacitor C20; the thirty-fourth pin of the first main control chip U2 is connected to one end of the third resistor R5; the thirty-fifth pin of the first main control chip U2 is connected to one end of the fourth capacitor C6; the thirty-sixth pin of the first main control chip U2 is connected to the other end of the fourth capacitor C6; the thirty-seventh pin of the first main control chip U2 is connected to one end of the second resistor R2; the forty-fourth pin of the first main control chip U2 is connected to one end of the first resistor R1; and the forty-seventh pin of the first main control chip U2 is connected to the second capacitor C4. One end of the first main control chip U2 is connected to one end of the first capacitor C1. The 48th pin of the first main control chip U2 is connected to the other end of the second capacitor C4 and the other end of the first capacitor C1. The first pin, the 24th pin, the 36th pin and the 48th pin of the first main control chip U2, as well as the other end of the fourth resistor R6, the other end of the ferrite bead L1 and the other end of the third resistor R5 are all connected to the DC power supply. The 8th pin, the 23rd pin, the 35th pin and the 47th pin of the first main control chip U2, as well as the other end of the third capacitor C5, the other end of the fifth capacitor C13, the other end of the sixth capacitor C19, the other end of the second resistor R2 and the other end of the first resistor R1 are all grounded. The 14th to 19th pins of the first main control chip U2 are connected to the first row output terminal, the second row output terminal, the third row output terminal, the first column output terminal, the second column output terminal and the third column output terminal of the matrix keypad control circuit 111, respectively. The 11th pin of the first main control chip U2 is connected to the infrared remote control transmitter circuit 113.

[0078] Among them, capacitors (such as C1, C4, C5, C6, C13, C19, C20) and resistors (such as R1, R2, R5, R6) are used for filtering, voltage regulation and current limiting to ensure the stable operation of the first main control chip U2 and the entire transmitting main control circuit 112; the ferrite bead L1 is used to suppress high-frequency noise and improve the anti-interference capability of the transmitting main control circuit 112; the DC power supply can be a 3.3V power supply.

[0079] It should be noted that the transmitting main control circuit 112 is based on the first main control chip U2. It is responsible for receiving action command signals from the matrix keypad control circuit 111, modulating them, and ultimately generating a modulated square wave signal for use by the infrared remote control transmitting circuit 113. This includes: multiple pins of the first main control chip U2 (pin 1, pin 24, pin 36, and pin 48) connected to a DC power supply through corresponding resistors, capacitors, and ferrite beads, providing the necessary operating voltage for the first main control chip U2; simultaneously, other pins (pin 8, pin 23, pin 35, and pin 47) are grounded to ensure stable operation of the first main control chip U2; pins 14 to 19 of the first main control chip U2 are respectively connected to the matrix keypad control circuit 111... The first row output, second row output, third row output, first column output, second column output, and third column output of the matrix key control circuit 111 are connected. When the user presses a key in the matrix key control circuit 111, the corresponding row output and column output will change level. This change is captured by the first main control chip U2 and used as the corresponding action command signal. The first main control chip U2 contains logic for modulating the action command signal. This process converts the action command signal into a modulated square wave signal suitable for infrared remote control transmission. The modulation process includes, but is not limited to, encoding, encryption, amplitude modulation, or frequency modulation to ensure the reliability and anti-interference of the infrared signal. The eleventh pin of the first main control chip U2 is connected to the infrared remote control transmission circuit 113, and this pin outputs a modulated square wave signal.

[0080] In this embodiment of the application, the above-mentioned transmitting main control circuit 112 is preferably designed so that the transmitting main control circuit 112 has excellent performance in terms of high efficiency, accuracy, stability and ease of maintenance, providing a good hardware foundation for infrared remote control-based lighting control.

[0081] In addition, by cleverly integrating the modulation processing function into the first main control chip U2, the complexity and cost of the receiving main control circuit 122 are reduced, while also facilitating the maintenance and upgrading of the receiving main control circuit 122 and making debugging more convenient.

[0082] based on Figure 4 Please see Figure 5 The following is another schematic diagram of the transmitting main control circuit in the embodiment of this application. The transmitting main control circuit 112 also includes an eighth capacitor C9, a ninth capacitor C12, a tenth capacitor C16, an eleventh capacitor C18, a fifth resistor R9, a first crystal oscillator X1, and a second crystal oscillator X2.

[0083] In one feasible implementation, one end of the first crystal oscillator X1 is connected to one end of the eighth capacitor C9, and the other end of the first crystal oscillator X1 is connected to one end of the ninth capacitor C12. The other end of the ninth capacitor C12 is connected to the other end of the eighth capacitor C9. The first end of the second crystal oscillator X2 is connected to one end of the tenth capacitor C16 and one end of the fifth resistor R9. The second end of the second crystal oscillator X2 is connected to one end of the eleventh capacitor C18. The third end of the second crystal oscillator X2 is connected to the other end of the eleventh capacitor C18 and the other end of the fifth resistor R9. The fourth end of the second crystal oscillator X2 is connected to the other end of the tenth capacitor C16. The other end of the eighth capacitor C9 and the fourth end of the second crystal oscillator X2 are both grounded. The third to sixth pins of the first main control chip U2 are connected to one end of the first crystal oscillator X1, the other end of the first crystal oscillator X1, the first end of the second crystal oscillator X2, and the third end of the second crystal oscillator X2, respectively.

[0084] The first crystal oscillator X1 and the second crystal oscillator X2 provide clock signals of different frequencies to meet the clock frequency requirements of different modules inside the first main control chip U2. Capacitors (C8, C9, C12, C16, C18) play the role of stabilizing the oscillation frequency, filtering and decoupling. The eighth capacitor C9 and the ninth capacitor C12 together with the first crystal oscillator X1 form a crystal oscillator circuit to ensure that the first crystal oscillator X1 can work stably. The tenth capacitor C16 and the eleventh capacitor C18 together with the second crystal oscillator X2 form another crystal oscillator circuit to ensure that the second crystal oscillator X2 can work stably. The resistor (R9) plays the role of current limiting and oscillation stabilization to ensure that the second crystal oscillator X2 can obtain a suitable current when it is working, thereby maintaining a stable oscillation frequency.

[0085] It should be noted that the transmitting main control circuit 112 adds a first crystal oscillator X1 and a second crystal oscillator X2, as well as related capacitors and resistors, to provide a stable operating clock signal for the first main control chip U2. This includes: when the transmitting main control circuit 112 is powered on, the first crystal oscillator X1 and the second crystal oscillator X2 start to oscillate and generate a stable clock signal. These clock signals are filtered by capacitors and current-limited by resistors, and then sent to the corresponding pins of the first main control chip U2. The first main control chip U2 performs modulation processing according to the received clock signal.

[0086] It should be further noted that a stable clock signal is one of the important factors to ensure the normal operation of digital circuits. In the transmitting main control circuit 112, the clock signals provided by the first crystal oscillator X1 and the second crystal oscillator X2 are crucial to ensuring the stable operation and efficient data processing of the first main control chip U2. Therefore, the transmitting main control circuit 112 of this application adds the first crystal oscillator X1 and the second crystal oscillator X2, as well as related capacitors and resistors, to provide a stable operating clock signal for the first main control chip U2, thereby enabling the first main control chip U2 to operate stably and ensuring that the modulation processing does not malfunction.

[0087] In this embodiment, the transmitting main control circuit 112, based on the above embodiment, adds a first crystal oscillator X1 and a second crystal oscillator X2, as well as related capacitors and resistors, to provide a stable working clock signal for the first main control chip U2. This enables the first main control chip U2 to more accurately identify and process action command signals, thereby improving the stability and reliability of the transmitting main control circuit 112 and providing a solid hardware foundation for infrared remote control-based lighting control.

[0088] based on Figure 2 and Figure 4 ,or Figure 2 and Figure 5 Please see Figure 6 The diagram below is a schematic of an infrared remote control transmitting circuit in an embodiment of this application. The infrared remote control transmitting circuit 113 includes a transistor Q1, an infrared emitting diode U6, a sixth resistor R19, a seventh resistor R22, and an eighth resistor R23.

[0089] In one feasible implementation, one end of the sixth resistor R19 is connected to the anode of the infrared emitting diode U6, the cathode of the infrared emitting diode U6 is connected to the collector of the transistor Q1, the base of the transistor Q1 is connected to one end of the seventh resistor R22 and one end of the eighth resistor R23, and the emitter of the transistor Q1 is connected to the other end of the eighth resistor R23; the other end of the sixth resistor R19 is connected to a DC power supply, and the emitter of the transistor Q1 is grounded; the eleventh pin of the first main control chip U2 is connected to the other end of the seventh resistor R22.

[0090] Among them, the eighth resistor R23 is used to provide the base bias current of the transistor Q1, ensuring that it is in the cut-off state when there is no signal input, which helps to prevent false triggering and reduce power consumption; the sixth resistor R19 plays the role of current limiting, protecting the infrared emitting tube U6 from damage by excessive current.

[0091] It should be noted that in the infrared remote control transmitting circuit 113, the various components work together to convert the modulated square wave signal from the transmitting main control circuit 112 into an infrared signal and transmit it. This includes: the eleventh pin of the first main control chip U2 in the transmitting main control circuit 112 outputs the modulated square wave signal, which is input to the base of transistor Q1 through the seventh resistor R22; transistor Q1 is used as a switch here, and the signal received at its base controls the conduction and cutoff between its collector and emitter; when the modulated square wave signal is high, transistor Q1... When the circuit is turned on, current is allowed to flow from the DC power supply through the sixth resistor R19 and the anode of the infrared emitting diode U6 to ground (i.e., the emitter of transistor Q1). At this time, the infrared emitting diode U6 emits light. When the modulation square wave signal is low, transistor Q1 is turned off, cutting off the current path, and the infrared emitting diode U6 is turned off. The infrared emitting diode U6 is a semiconductor device that can emit infrared light. When it is turned on by the driving circuit (i.e., transistor Q1 and related resistors), it will emit infrared signals. These infrared light signals correspond to the modulation square wave signal, that is, they contain information of the action command signal.

[0092] In this embodiment of the application, the infrared remote control transmitting circuit 113 converts the modulated square wave signal into an infrared signal through the combination of transistor Q1 and infrared emitting tube U6, and transmits it through infrared emitting tube U6 to complete the transmission function in infrared remote control, so as to realize short-range remote control of lighting equipment.

[0093] Furthermore, this application, through the reasonable design of the infrared remote control transmitting circuit 113, can achieve efficient, stable, and reliable infrared remote control transmitting function.

[0094] based on Figure 1 Please see Figure 7 This is a schematic diagram of a lighting control device based on infrared remote control in an embodiment of this application. Figure 3 and based on Figure 2 Please see Figure 8 This is a schematic diagram of a lighting control device based on infrared remote control in an embodiment of this application. Figure 4 The receiver 120 includes an infrared remote control receiving circuit 121 and a receiving main control circuit 122 connected in sequence.

[0095] In one feasible implementation, the infrared remote control receiving circuit 121 is used to receive infrared signals and demodulate the infrared signals to obtain baseband signals; the receiving main control circuit 122 is used to receive baseband signals and restore the baseband signals to obtain action command signals.

[0096] In this embodiment of the application, the receiver 120 is decomposed into two modules: an infrared remote control receiving circuit 121 and a receiving main control circuit 122. The infrared remote control receiving circuit 121 is responsible for receiving the infrared signal emitted from the transmitter 110 and demodulating it. The receiving main control circuit 122 receives the baseband signal and restores it, thereby improving the efficiency and reliability of the receiving function in infrared remote control.

[0097] Furthermore, the modular and hierarchical structure significantly improves the scalability of the receiver 120's structure and functions, making it more user-friendly.

[0098] based on Figure 7 or Figure 8 Please see Figure 9 The diagram below is a schematic of an infrared remote control receiving circuit in an embodiment of this application. The infrared remote control receiving circuit 121 includes an infrared remote control receiver head U8, a ninth resistor R30, a tenth resistor R32, a twelfth capacitor C35, and a thirteenth capacitor C36.

[0099] In one feasible implementation, the first end of the infrared remote control receiver U8 is connected to one end of the tenth resistor R32, the second end of the infrared remote control receiver U8 is connected to one end of the twelfth capacitor C35 and one end of the thirteenth capacitor C36, the third end of the infrared remote control receiver U8 is connected to the other end of the twelfth capacitor C35, the other end of the thirteenth capacitor C36, and one end of the ninth resistor R30, the other end of the ninth resistor R30 is connected to the other end of the tenth resistor R32, the other end of the ninth resistor R30 is connected to a DC power supply, and the first end of the infrared remote control receiver U8 is connected to the receiving main control circuit 122.

[0100] Among them, capacitors (C35, C36) play the role of filtering and decoupling to ensure the stable operation of infrared remote control receiver circuit 121; resistors (R30, R32) play the role of current limiting to protect infrared remote control receiver head U8 from damage by excessive current.

[0101] It should be noted that the infrared remote control receiving circuit 121 is responsible for receiving the infrared signals emitted from the transmitter 110 and demodulating them. This includes: when the transmitter 110 emits infrared signals, these infrared signals will propagate through the air and eventually be captured by the infrared remote control receiving head U8 of the infrared remote control receiving circuit 121 in the receiver 120; the infrared remote control receiving head U8 is a semiconductor device capable of detecting and receiving infrared signals. The infrared remote control receiving head U8 contains a demodulation circuit, which can demodulate the received infrared signals to separate the baseband signal; the baseband signal obtained by demodulation is output to the receiving main control circuit 122 through the output terminal of the infrared remote control receiving head U8.

[0102] In this embodiment, the infrared remote control receiving circuit 121 achieves the reception and demodulation of infrared signals through the ingenious design of the infrared remote control receiver head U8. That is, the infrared remote control receiver head U8 is specifically used to receive infrared signals and convert them into more baseband signals, which effectively improves the efficiency of the receiver 120. Moreover, the infrared remote control receiver head U8 can accurately demodulate the infrared signals and extract the information of the action command signals contained therein, ensuring the accuracy of command transmission.

[0103] In addition, modularizing and layering the receiving function simplifies the design of the subsequent receiving main control circuit 122.

[0104] based on Figure 7 and Figure 9 ,or Figure 8 and Figure 9 Please see Figure 10 The diagram below is a schematic of the receiving main control circuit in an embodiment of this application. The receiving main control circuit 122 includes a second main control chip U4, a fourteenth capacitor C2, a fifteenth capacitor C3, a sixteenth capacitor C10, a seventeenth capacitor C11, an eighteenth capacitor C14, a nineteenth capacitor C15, a twentieth capacitor C17, a twenty-first capacitor C22, an eleventh resistor R3, a twelfth resistor R4, a thirteenth resistor R7, a fourteenth resistor R8, a fifteenth resistor R12, and a sixteenth resistor R13.

[0105] In one feasible implementation, the first pin of the second main control chip U4 is connected to one end of the sixteenth capacitor C10; the seventh pin of the second main control chip U4 is connected to one end of the fourteenth resistor R8 and one end of the eighteenth capacitor C14; the ninth pin of the second main control chip U4 is connected to one end of the nineteenth capacitor C15 and one end of the twentieth capacitor; the tenth pin of the second main control chip U4 is connected to one end of the fifteenth resistor R12 and one end of the sixteenth resistor R13; the twenty-third pin of the second main control chip U4 is connected to one end of the twenty-first capacitor C22; the twenty-fourth pin of the second main control chip U4 is connected to the other end of the twenty-first capacitor C22; the thirty-fourth pin of the second main control chip U4 is connected to one end of the thirteenth resistor R7; the thirty-fifth pin of the second main control chip U4 is connected to one end of the seventeenth capacitor C11; the thirty-sixth pin of the second main control chip U4 is connected to the other end of the seventeenth capacitor C11; and the thirty-seventh pin of the second main control chip U4 is connected to one end of the eleventh resistor R3. Pin 44 of the main control chip U4 is connected to one end of resistor R4. Pin 47 of the second main control chip U4 is connected to one end of capacitor C3 and one end of capacitor C2. Pin 48 of the second main control chip U4 is connected to the other end of capacitor C3 and capacitor C2. Pins 1, 9, 24, 36, and 48 of the second main control chip U4, as well as the other ends of resistors R8, R13, and R7, are all connected to a DC power supply. Pins 8, 23, 35, and 47 of the second main control chip U4, as well as the other ends of capacitors C10, C14, C15, R12, R3, and R4, are all grounded. Pin 11 of the second main control chip U4 is connected to the first end of the infrared remote control receiver U8.

[0106] Among them, capacitors (such as C2, C3, C10, C11, C14, C15, C17, and C22) are mainly used for filtering, decoupling, and stabilizing voltage to ensure the stable operation of the second main control chip U4 and the entire receiving main control circuit 122; resistors (such as R3, R4, R7, R8, R12, and R13) are mainly used for current limiting, voltage division, and providing bias current to ensure that the devices in the receiving main control circuit 122 can work normally; the second main control chip U4 is the core of the receiving main control circuit 122, responsible for receiving, restoring, and processing baseband signals, and outputting action command signals.

[0107] It should be noted that the receiving main control circuit 122 is responsible for receiving the baseband signal from the infrared remote control receiving circuit 121 and performing restoration processing to obtain the action command signal. This includes: multiple pins of the second main control chip U4 in the receiving main control circuit 122 are connected to a DC power supply through corresponding resistors and capacitors to provide the necessary operating voltage for the second main control chip U4; at the same time, other pins are grounded to ensure the stable operation of the second main control chip U4; the eleventh pin of the second main control chip U4 is connected to the first end of the infrared remote control receiver head U8 to receive the baseband signal from the infrared remote control receiving circuit 121; the infrared remote control receiver head U8 is responsible for capturing and demodulating the infrared signal emitted from the transmitter 110 and outputting the demodulated baseband signal to the eleventh pin of the second main control chip U4; the second main control chip U4 contains logic for restoring the baseband signal. This process converts the baseband signal into a corresponding action command signal, which is used to control the function of the lighting equipment. The restoration processing includes, but is not limited to, decoding, decryption, and demodulation operations to ensure that the received signal can accurately reflect the action command issued by the transmitter 110.

[0108] In this embodiment, the receiving main control circuit 122 achieves the reception, restoration and processing of infrared signals through ingenious circuit design, and finally outputs action command signals for controlling lighting equipment. This design not only improves the efficiency and accuracy of the lighting control device.

[0109] In addition, by cleverly integrating the restoration processing function into the second main control chip U4, the complexity and cost of the receiving main control circuit 122 are reduced, while also facilitating the maintenance and upgrading of the receiving main control circuit 122 and making debugging more convenient.

[0110] based on Figure 10 Please see Figure 11 The diagram below shows another schematic of the receiving main control circuit in this application embodiment. The receiving main control circuit 122 also includes a twenty-second capacitor C7, a twenty-third capacitor C8, and a third crystal oscillator X3.

[0111] In one feasible implementation, one end of the third crystal oscillator X3 is connected to one end of the twenty-second capacitor C7, the other end of the third crystal oscillator X3 is connected to one end of the twenty-third capacitor C8, and the other end of the twenty-third capacitor C8 is connected to the other end of the twenty-second capacitor C7; the other ends of the twenty-third capacitor C8 and the other ends of the twenty-second capacitor C7 are both grounded; the third pin of the second main control chip U4 is connected to the other end of the third crystal oscillator X3, and the fourth pin of the second main control chip U4 is connected to one end of the third crystal oscillator X3.

[0112] The third crystal oscillator X3 serves to provide a stable clock signal; the twenty-second capacitor C7 and the twenty-third capacitor C8 serve to filter and stabilize the oscillation frequency, together with the third crystal oscillator X3, forming a complete crystal oscillator circuit.

[0113] It should be noted that the receiving main control circuit 122 adds a third crystal oscillator X3 and related capacitors to the above embodiment to provide a stable operating clock signal for the second main control chip U4. This includes: when the circuit is powered on, the third crystal oscillator X3 starts to oscillate and generates a stable clock signal. This clock signal is filtered by the twenty-second capacitor C7 and the twenty-third capacitor C8 and then sent to the corresponding pin of the second main control chip U4. The second main control chip U4 performs internal operations and data processing according to the received clock signal, thereby ensuring the stable operation of the entire receiving main control circuit 122. This embodiment is similar to the transmitting main control circuit 112 in the above embodiment, and will not be described in detail here.

[0114] In this embodiment, the receiving main control circuit 122 adds a third crystal oscillator X3 and related capacitors to the above embodiment to provide a stable working clock signal for the second main control chip U4, so that the receiving main control circuit 122 can receive and process the baseband signal from the infrared remote control receiving circuit 121 more accurately, thereby improving the stability and reliability of the entire lighting control device.

[0115] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0116] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of this patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A lighting control device based on infrared remote control, characterized in that, The device includes a transmitter and a receiver; The transmitter is used to generate an action command signal based on the user's key press, process the action command signal to obtain an infrared signal, and then transmit the infrared signal. The receiver is used to receive the infrared signal and process the infrared signal to obtain the action command signal, which is used to control the lighting.

2. The apparatus according to claim 1, characterized in that, The transmitter includes a matrix keypad control circuit, a main transmission control circuit, and an infrared remote control transmission circuit connected in sequence. The matrix key control circuit is used to generate the action command signal based on the user's key press actions; The transmitting main control circuit is used to receive the action command signal and modulate the action command signal to obtain a modulated square wave signal. The infrared remote control transmitting circuit is used to receive the modulated square wave signal, convert the modulated square wave signal into the infrared signal, and transmit the infrared signal.

3. The apparatus according to claim 2, characterized in that, The matrix keypad control circuit includes multiple keypad switches connected in a matrix.

4. The apparatus according to claim 2, characterized in that, Multiple key switches connected in a matrix are nine key switches connected in a 3x3 matrix. The transmitting main control circuit includes a first main control chip, a first capacitor, a second capacitor, a third capacitor, a fourth capacitor, a fifth capacitor, a sixth capacitor, a seventh capacitor, a first resistor, a second resistor, a third resistor, a fourth resistor, and a ferrite bead. The first pin of the first main control chip is connected to one end of the third capacitor; the seventh pin of the first main control chip is connected to one end of the fourth resistor and one end of the fifth capacitor; the ninth pin of the first main control chip is connected to one end of the ferrite bead and one end of the sixth capacitor; the twenty-third pin of the first main control chip is connected to one end of the seventh capacitor; the twenty-fourth pin of the first main control chip is connected to the other end of the seventh capacitor; the thirty-fourth pin of the first main control chip is connected to one end of the third resistor; the thirty-fifth pin of the first main control chip is connected to one end of the fourth capacitor; the thirty-sixth pin of the first main control chip is connected to the other end of the fourth capacitor; the thirty-seventh pin of the first main control chip is connected to one end of the second resistor; the forty-fourth pin of the first main control chip is connected to one end of the first resistor; the forty-seventh pin of the first main control chip is connected to one end of the second capacitor and one end of the first capacitor; and the forty-eighth pin of the first main control chip is connected to the other end of the second capacitor and the other end of the first capacitor. The first, twenty-four, thirty-six, and forty-eighth pins of the first main control chip, as well as the other end of the fourth resistor, the other end of the ferrite bead, and the other end of the third resistor, are all connected to a DC power supply; the eighth, twenty-third, thirty-fifth, and forty-seventh pins of the first main control chip, as well as the other end of the third capacitor, the other end of the fifth capacitor, the other end of the sixth capacitor, the other end of the second resistor, and the other end of the first resistor are all grounded; Pins 14 to 19 of the first main control chip are connected to the first row output, second row output, third row output, first column output, second column output, and third column output of the matrix keypad control circuit, respectively, and pin 11 of the first main control chip is connected to the infrared remote control transmitting circuit.

5. The apparatus according to claim 4, characterized in that, The main control circuit for transmission also includes an eighth capacitor, a ninth capacitor, a tenth capacitor, an eleventh capacitor, a fifth resistor, a first crystal oscillator, and a second crystal oscillator. One end of the first crystal oscillator is connected to one end of the eighth capacitor, and the other end of the first crystal oscillator is connected to one end of the ninth capacitor, and the other end of the ninth capacitor is connected to the other end of the eighth capacitor; the first end of the second crystal oscillator is connected to one end of the tenth capacitor and one end of the fifth resistor, the second end of the second crystal oscillator is connected to one end of the eleventh capacitor, the third end of the second crystal oscillator is connected to the other end of the eleventh capacitor and the other end of the fifth resistor, and the fourth end of the second crystal oscillator is connected to the other end of the tenth capacitor; The other end of the eighth capacitor and the fourth end of the second crystal oscillator are both grounded; The third to sixth pins of the first main control chip are respectively connected to one end of the first crystal oscillator, the other end of the first crystal oscillator, the first end of the second crystal oscillator, and the third end of the second crystal oscillator.

6. The apparatus according to claim 4 or 5, characterized in that, The infrared remote control transmitting circuit includes a transistor, an infrared emitting diode, a sixth resistor, a seventh resistor, and an eighth resistor; One end of the sixth resistor is connected to the anode of the infrared emitting diode, the cathode of the infrared emitting diode is connected to the collector of the transistor, the base of the transistor is connected to one end of the seventh resistor and one end of the eighth resistor, and the emitter of the transistor is connected to the other end of the eighth resistor. The other end of the sixth resistor is connected to a DC power supply, and the emitter end of the transistor is grounded; The eleventh pin of the first main control chip is connected to the other end of the seventh resistor.

7. The apparatus according to claim 1, characterized in that, The receiver includes an infrared remote control receiving circuit and a receiving main control circuit connected in sequence. The infrared remote control receiving circuit is used to receive the infrared signal and demodulate the infrared signal to obtain the baseband signal; The receiving main control circuit is used to receive the baseband signal and perform restoration processing on the baseband signal to obtain the action command signal.

8. The apparatus according to claim 7, characterized in that, The infrared remote control receiving circuit includes an infrared remote control receiver head, a ninth resistor, a tenth resistor, a twelfth capacitor, and a thirteenth capacitor; The first end of the infrared remote control receiver head is connected to one end of the tenth resistor, the second end of the infrared remote control receiver head is connected to one end of the twelfth capacitor and one end of the thirteenth capacitor respectively, the third end of the infrared remote control receiver head is connected to the other end of the twelfth capacitor, the other end of the thirteenth capacitor and one end of the ninth resistor respectively, and the other end of the ninth resistor is connected to the other end of the tenth resistor. The other end of the ninth resistor is connected to a DC power supply. The first end of the infrared remote control receiver is connected to the receiving main control circuit.

9. The apparatus according to claim 7, characterized in that, The receiving main control circuit includes a second main control chip, a fourteenth capacitor, a fifteenth capacitor, a sixteenth capacitor, a seventeenth capacitor, an eighteenth capacitor, a nineteenth capacitor, a twentieth capacitor, a twenty-first capacitor, an eleventh resistor, a twelfth resistor, a thirteenth resistor, a fourteenth resistor, a fifteenth resistor, and a sixteenth resistor; The first pin of the second main control chip is connected to one end of the sixteenth capacitor; the seventh pin of the second main control chip is connected to one end of the fourteenth resistor and one end of the eighteenth capacitor; the ninth pin of the second main control chip is connected to one end of the nineteenth capacitor and one end of the twentieth capacitor; the tenth pin of the second main control chip is connected to one end of the fifteenth resistor and one end of the sixteenth resistor; the twenty-third pin of the second main control chip is connected to one end of the twenty-first capacitor; the twenty-fourth pin of the second main control chip is connected to the other end of the twenty-first capacitor; and the thirty-fourth pin of the second main control chip... The pin is connected to one end of the thirteenth resistor, the thirty-fifth pin of the second main control chip is connected to one end of the seventeenth capacitor, the thirty-sixth pin of the second main control chip is connected to the other end of the seventeenth capacitor, the thirty-seventh pin of the second main control chip is connected to one end of the eleventh resistor, the forty-fourth pin of the second main control chip is connected to one end of the twelfth resistor, the forty-seventh pin of the second main control chip is connected to one end of the fifteenth capacitor and one end of the fourteenth capacitor, and the forty-eighth pin of the second main control chip is connected to the other end of the fifteenth capacitor and the other end of the fourteenth capacitor. The first, ninth, twenty-fourth, thirty-sixth, and forty-eighth pins of the second main control chip, as well as the other ends of the fourteenth, sixteenth, and thirteenth resistors, are all connected to a DC power supply; the eighth, twenty-third, thirty-fifth, and forty-seventh pins of the second main control chip, as well as the other ends of the sixteenth, eighteenth, and nineteenth capacitors, the fifteenth, eleventh, and twelfth resistors, are all grounded; The eleventh pin of the second main control chip is connected to the first end of the infrared remote control receiver.

10. The apparatus according to claim 9, characterized in that, The receiving main control circuit also includes a twenty-second capacitor, a twenty-third capacitor, and a third crystal oscillator; One end of the third crystal oscillator is connected to one end of the 22nd capacitor, and the other end of the third crystal oscillator is connected to one end of the 23rd capacitor, and the other end of the 23rd capacitor is connected to the other end of the 22nd capacitor. The other end of the 23rd capacitor and the other end of the 22nd capacitor are both grounded; The third pin of the second main control chip is connected to the other end of the third crystal oscillator, and the fourth pin of the second main control chip is connected to one end of the third crystal oscillator.

Images