Plant light supplement control circuit

Abstract

The utility model discloses a plant light supplement control circuit, which comprises a power supply circuit, a constant current drive circuit, a main lamp panel, an externally hung lamp strip, a knob switch control circuit and a decoding control circuit, and is characterized in that the power supply circuit is used for converting alternating current into direct current to provide basic power for a system; the constant current driving circuit is used for stably outputting current to the main lamp panel and the externally-hung lamp strip according to an instruction of the decoding control circuit, the main lamp panel is used for providing supplementary light with an adjustable spectrum to the main lamp panel, and the externally-hung lamp strip is used for providing supplementary light with an adjustable spectrum to the externally-hung lamp strip. The knob switch control circuit is used for multi-gear adjustment of total power and output of a specific channel, through implementation of the plant light supplement lamp, accurate regulation and control of spectrum and power are achieved, the plant light supplement lamp has flexible lamp strip expansibility and reliable electrical isolation, modular design is achieved, maintenance is convenient, functionality and practicability of the plant light supplement lamp are improved, and the plant light supplement lamp is suitable for popularization and application. And the device has certain use value and popularization value.

Description

Technical Field

[0001] This utility model relates to the field of plant supplemental lighting technology, and in particular to a plant supplemental lighting control circuit. Background Technology

[0002] In modern agriculture, grow-a-plant lights play a vital role in promoting crop growth and improving yield and quality. However, existing grow-a-plant systems generally suffer from the following problems or shortcomings:

[0003] 1. Inflexible spectral adjustment: Traditional plant grow lights typically provide only a fixed spectrum of light, making it impossible to precisely adjust them according to different growth stages and needs of crops. This limits their application effectiveness on various crops and fails to meet the demands of modern agriculture for refined management.

[0004] 2. Insufficient power control: Most existing supplemental lighting systems lack precise power adjustment functions, making it difficult to achieve fine adjustments to light intensity, thus affecting the optimal growth environment for crops;

[0005] 3. Poor expandability of light strips: Many supplementary lighting fixtures are designed with a fixed structure, and users cannot freely increase or decrease the number of light strips according to the actual planting area and crop type, making it difficult to optimize the light coverage and intensity;

[0006] 4. Lack or inadequate electrical isolation: Some supplementary lighting systems lack effective electrical isolation measures, making them susceptible to external electromagnetic interference, which can cause unstable signal transmission or even damage circuit components.

[0007] In summary, a plant supplemental lighting control circuit is needed to address the shortcomings of existing technologies. Utility Model Content

[0008] To address the shortcomings of existing technologies, this invention provides a plant supplemental lighting control circuit, aiming to solve the aforementioned problems.

[0009] To achieve the above objectives, this utility model provides the following technical solution: a plant supplemental lighting control circuit, comprising a power supply circuit, a constant current drive circuit, a main lamp board, external light strips, a rotary switch control circuit, and a decoding control circuit. The power supply circuit is used to convert AC power into DC power to provide basic power to the system. The constant current drive circuit is used to stably output current to the main lamp board and external light strips according to the instructions of the decoding control circuit. The main lamp board is used to provide adjustable spectrum supplemental lighting to the main lamp board. The external light strips are used to provide adjustable spectrum supplemental lighting to the external light strips. The rotary switch control circuit is used to adjust the total power and the output of specific channels in multiple levels. The decoding control circuit is used to convert control instructions into PWM signals and coordinate the operation of each module.

[0010] The output of the power supply circuit is connected to the constant current drive circuit, the rotary switch control circuit, and the decoding control circuit. The output of the constant current drive circuit is connected to the main lamp board and the external light strip. The external light strip is connected to the main lamp board. The output of the rotary switch control circuit is connected to the decoding control circuit, and the output of the decoding control circuit is connected to the constant current drive circuit. The decoding control circuit enables precise control of the spectrum and power, provides flexible light strip expansion and reliable electrical isolation, and its modular design facilitates maintenance, thus enhancing the functionality and practicality of the plant grow light.

[0011] Furthermore, the decoding control circuit includes a signal input module, a main control module, a power management module, a dimming output module, and a digital isolation module. The signal input module is used to receive external dimming signals, the main control module is used to decode external dimming signals and generate dimming control commands, the power management module is used to provide multi-stage regulated power supplies for the main control module and peripheral circuits, the dimming output module is used to output multiple PWM signals according to the dimming control commands to drive the corresponding lamp board, and the digital isolation module is used to achieve electrical isolation.

[0012] The output terminal of the signal input module is connected to the main control module, the output terminal of the main control module is connected to the digital isolation module, the output terminal of the digital isolation module is connected to the dimming output module, the output terminal of the dimming output module is connected to the constant current drive circuit, and the power management module is connected to the main control module.

[0013] Furthermore, the signal input module includes a chip U1, resistors R8, R9, R10, R11, and R12, diodes D3, D4, and D5, and a capacitor C6. Resistors R8, R9, and R12 are all connected to the chip U1, and diodes D3 and D4 are all connected to diode D5. The capacitor C6 is used for filtering and stabilizing the power supply voltage to ensure that the chip U1 operates normally.

[0014] Furthermore, the main control module includes chip N2, resistors R5, R6, R7, and RD1, capacitor C7, and light-emitting diode LD1. Resistors R5, R6, and R7 are all connected to chip N2. One end of light-emitting diode LD1 is connected to resistor RD1, and the other end of light-emitting diode LD1 is connected to chip N2. Capacitor C7 is used for filtering.

[0015] Furthermore, the dimming output module includes chip N1, resistors R1, R2, R3, and R4, capacitors C3, C4, and C5, diodes D1 and D2. Resistors R1, R2, R3, and R4, capacitors C3, C4, and C5, and diodes D1 and D2 are all connected to chip N1. Resistors R1, R2, R3, and R4 form a resistor divider network to convert external analog signals into levels suitable for chip N1 processing. Diode D1 is connected in series with resistor R2, and diode D2 is connected in series with resistor R3. Capacitors C3 and C5 are used to filter and reduce high-frequency noise in the input signal, and capacitor C4 is used to filter and stabilize the power supply voltage to ensure the normal operation of chip N1.

[0016] Furthermore, the power management module includes a power supply unit and a power regulation unit, which are connected to each other.

[0017] Furthermore, the power supply unit includes a chip U3, capacitors C9, C10, and C11, and a resistor R16. Capacitors C9 and C10 are connected in parallel between pin 1 and pin 2 of chip U3, capacitor C11 is connected in parallel between pin 2 and pin 3 of chip U3, and resistor R16 is connected to pin 3 of chip U3.

[0018] The power regulation unit includes an operational amplifier U2B, resistors R13, R14, R15, R16, and R17, capacitors C8, C12, and CC1, diodes D6 and D7, and a thermistor PTC1. One end of the thermistor PTC1 is connected to diode D6, and the other end of the thermistor PTC1 is connected to diode D7. Capacitor C8 and resistor R13 are connected to pin 5 of the operational amplifier U2B. Resistor R14 is connected in parallel with capacitor CC1. Resistors R15 and R17 are connected to pin 6 of the operational amplifier U2B.

[0019] Furthermore, the digital isolation module includes a chip UU1, a capacitor C1, and a capacitor C2. The capacitors C1 and C2 are used to filter and stabilize the power supply voltage to ensure that the chip UU1 works normally.

[0020] Furthermore, the external light strip is connected in parallel to the main light board via a plug-in interface. The external light strip includes a warm and cool light module and a UV light module, and the main light board includes a warm and cool light module and a blue light module.

[0021] Furthermore, it also includes a control panel circuit, which is used for advanced spectral recipe setting and system parameter monitoring, and the control panel circuit is communicatively connected to a rotary switch control circuit.

[0022] The beneficial effects of this utility model are:

[0023] 1. In this utility model, by integrating multiple LED light sources and combining a rotary switch control module and a control panel, the output spectrum can be flexibly adjusted to adapt to the light requirements of different crops at different growth stages.

[0024] 2. In this utility model, by adopting a DC-DC 4-channel constant current drive circuit, the current of each group of LED light strips can be adjusted independently, ensuring that each group of light strips can obtain a stable and precise current drive, thereby achieving fine control of light intensity.

[0025] 3. In this utility model, the design of the main light board and external light strips allows users to freely increase or decrease the number of light strips according to actual planting needs, which improves the flexibility and adaptability of the system. Furthermore, the digital isolation chip ensures the safety and stability of signal transmission and effectively prevents external electromagnetic interference from affecting the control system, thus possessing certain practical and promotional value. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of this utility model 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 this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 This is a system principle block diagram of Example 1.

[0028] Figure 2 This is a schematic diagram of the circuit structure of the signal input module in Example 1.

[0029] Figure 3 This is a schematic diagram of the circuit structure of the main control module in Example 1.

[0030] Figure 4 This is a schematic diagram of the circuit structure of the dimming output module in Example 1.

[0031] Figure 5 This is a schematic diagram of the circuit structure of the power supply unit in Example 1.

[0032] Figure 6 This is a schematic diagram of the circuit structure of the power regulation unit in Example 1.

[0033] Figure 7 This is a schematic diagram of the circuit structure of the digital isolation module in Example 1.

[0034] Figure 8This is a schematic diagram of the circuit structure of the rotary switch control circuit K1 in Example 2.

[0035] Figure 9 This is a schematic diagram of the circuit structure of the rotary switch control circuit K2 in Example 2.

[0036] Figure 10 This is a schematic diagram of the circuit structure of the rotary switch control circuit K3 in Example 2.

[0037] Figure 11 This is a schematic diagram of the DC-DC circuit structure for both warm and cool light in Example 2.

[0038] Figure 12 This is a schematic diagram of the UV light DC-DC circuit structure in Example 2.

[0039] Figure 13 This is a schematic diagram of the blue light DC-DC circuit structure in Example 2. Detailed Implementation

[0040] To facilitate understanding of this utility model, a more detailed description is provided below with reference to the accompanying drawings and specific embodiments. It should be noted that when an element is described as "fixed to" another element, it can be directly on the other element, or one or more intermediate elements may exist between them. When an element is described as "connected to" another element, it can be directly connected to the other element, or one or more intermediate elements may exist between them. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this specification are for illustrative purposes only.

[0041] Unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the scope of the invention. The term "and / or" as used in this specification includes any and all combinations of one or more of the associated listed items.

[0042] Example 1:

[0043] like Figure 1As shown, a plant supplemental lighting control circuit includes a power supply circuit, a constant current drive circuit, a main lamp board, external light strips, a rotary switch control circuit, and a decoding control circuit. The power supply circuit is used to convert AC power to DC power to provide basic power for the system. The constant current drive circuit is used to stably output current to the main lamp board and external light strips according to the instructions of the decoding control circuit. The main lamp board is used to provide adjustable spectrum supplemental lighting to the main lamp board, and the external light strips are used to provide adjustable spectrum supplemental lighting to the external light strips. The rotary switch control circuit is used to adjust the total power and the output of specific channels in multiple levels. The decoding control circuit is used to convert control instructions into PWM signals and coordinate the operation of each module.

[0044] The output of the power supply circuit is connected to the constant current drive circuit, the rotary switch control circuit, and the decoding control circuit. The output of the constant current drive circuit is connected to the main light board and the external light strip. The external light strip is connected to the main light board. The output of the rotary switch control circuit is connected to the decoding control circuit. The output of the decoding control circuit is connected to the constant current drive circuit.

[0045] In one implementation, the decoding control circuit includes a signal input module, a main control module, a power management module, a dimming output module, and a digital isolation module. The signal input module is used to receive external dimming signals, the main control module is used to decode external dimming signals and generate dimming control commands, the power management module is used to provide multi-stage regulated power supplies for the main control module and peripheral circuits, the dimming output module is used to output multiple PWM signals according to the dimming control commands to drive the corresponding lamp boards, and the digital isolation module is used to achieve electrical isolation.

[0046] The output of the signal input module is connected to the main control module, the output of the main control module is connected to the digital isolation module, the output of the digital isolation module is connected to the dimming output module, the output of the dimming output module is connected to the constant current drive circuit, and the power management module is connected to the main control module.

[0047] When the system is connected to an external control panel, the spectral information is input through the control panel circuit. The external signal is decoded by the main control module and sent to the dimming output module through the digital isolation module. The dimming output module collects the number of light strips and outputs a dimming signal to the DC-DC driver.

[0048] When this system is not connected to an external control panel, the control panel circuit inputs spectral information through the rotary switch signal path. The main control module decodes the external signal and sends the signal to the dimming output module through the digital isolation module. The dimming output module collects the number of light strips and outputs a dimming signal to the DC-DC driver.

[0049] As one implementation method, such as Figure 2As shown, the signal input module includes chip U1, resistors R8, R9, R10, R11, and R12, diodes D3, D4, and D5, capacitor C6, external signal interface RJ1, and external signal interface RJ2. Resistors R8, R9, and R12 are all connected to chip U1, and diodes D3 and D4 are all connected to diode D5. Capacitor C6 is used for filtering and stabilizing the power supply voltage to ensure the normal operation of chip U1. External signal interfaces RJ1 and RJ2 support differential signal (485A, 485B) or single-ended signal input, which is transmitted to the MCU through a digital isolation chip.

[0050] Resistors R8 and R9 are connected in series, with one end connected to the +5V power supply and the other end connected to pins 6 and 7 of the digital isolation chip U1, respectively. Resistors R10 and R11 are connected between the 485A and 485B signal lines and ground, respectively. One end of resistor R12 is connected to pin 5 of the digital isolation chip U1, and the other end is connected to the anode of diodes D3 and D4 and the cathode of diode D5, which serves to limit current and prevent excessive current from damaging the circuit.

[0051] Diodes D3 and D4 are transient voltage suppressor diodes, connected in parallel on the 485A and 485B signal lines respectively, to protect the circuit from overvoltage surges. Their cathodes are connected to the 485A and 485B signal lines respectively, and their anodes are connected to the cathode of D5. The anode of diode D5 is grounded, and its cathode is connected to the anodes of D3 and D4, forming a common grounding path, which further enhances the overvoltage protection capability of the circuit.

[0052] As one implementation method, such as Figure 3 As shown, the main control module includes chip N2, resistors R5, R6, R7, and RD1, capacitor C7, and LED LD1. Resistors R5, R6, and R7 are all connected to chip N2. One end of LED LD1 is connected to resistor RD1, and the other end of LED LD1 is connected to chip N2. Capacitor C7 is used for filtering.

[0053] As one implementation method, such as Figure 4As shown, the dimming output module includes chip N1, resistors R1, R2, R3, and R4, capacitors C3, C4, and C5, diodes D1 and D2. Resistors R1, R2, R3, and R4, capacitors C3, C4, and C5, and diodes D1 and D2 are all connected to chip N1. Resistors R1, R2, R3, and R4 form a resistor divider network to convert external analog signals into levels suitable for chip N1 processing. Diode D1 is connected in series with resistor R2, and diode D2 is connected in series with resistor R3. Capacitors C3 and C5 are used to filter and reduce high-frequency noise in the input signal. Capacitor C4 is used to filter and stabilize the power supply voltage to ensure the normal operation of chip N1.

[0054] Diodes D1 and D2 (5.1V Zener diodes) are connected in series with signal lines A1 and A2 respectively to provide overvoltage protection and prevent damage to the circuit from excessive input voltage.

[0055] Capacitors C3 and C5 (0.1μF capacitors) are connected between the nodes of resistors R2 and R4 and SGND, respectively, for filtering and reducing high-frequency noise in the input signal;

[0056] LED strip quantity acquisition section: The signal inputs are A1 and A2, and after passing through a resistor voltage divider and Zener diode protection, they are connected to the ICEDAT1 pin of the N1 chip. Capacitors C3 and C5 are used for filtering.

[0057] Dimming output section: Chip N1 outputs dimming signals through multiple PWM pins. These signals are connected to external lamps through Header 8H to achieve brightness adjustment.

[0058] In one implementation, the power management module includes a power supply unit and a power regulation unit, which are connected to each other.

[0059] As one implementation method, such as Figure 5 As shown, the power supply unit includes chip U3, capacitors C9, C10, and C11, and resistor R16. Capacitors C9 and C10 are connected in parallel between pin 1 and pin 2 of chip U3, capacitor C11 is connected in parallel between pin 2 and pin 3 of chip U3, and resistor R16 is connected to pin 3 of chip U3.

[0060] like Figure 6As shown, the power regulation unit includes operational amplifier U2B, resistors R13, R14, R15, R16, and R17, capacitors C8, C12, and CC1, diodes D6 and D7, and a thermistor PTC1. One end of the thermistor PTC1 is connected to diode D6, and the other end is connected to diode D7. Capacitor C8 and resistor R13 are connected to pin 5 of operational amplifier U2B. Resistor R14 is connected in parallel with capacitor CC1. Resistors R15 and R17 are connected to pin 6 of operational amplifier U2B. Resistors R15 and R17 provide a stable reference voltage to the non-inverting input of operational amplifier U2B. This configuration allows the operational amplifier to perform precise signal regulation based on the input signal (the voltage provided by R13) and the feedback signal (the voltage divider provided by R15 and R17), thereby achieving effective control of power or other parameters in the circuit.

[0061] As one implementation method, such as Figure 7 As shown, the digital isolation module includes chip UU1, capacitor C1 and capacitor C2. Capacitors C1 and C2 are used to filter and stabilize the power supply voltage to ensure that chip UU1 works normally.

[0062] In one implementation, the external light strip is connected in parallel to the main light board via a plug-in interface. The external light strip includes a warm and cool light module and a UV light module, while the main light board includes a warm and cool light module and a blue light module.

[0063] As one implementation, it also includes a control panel circuit, which is used for advanced spectral recipe setting and system parameter monitoring, and is communicatively connected to a rotary switch control circuit.

[0064] Example 2:

[0065] This embodiment is basically the same as Embodiment 1, except that this application provides a connection between a power supply circuit (AC-DC power supply) and a constant current drive circuit (DC-DC 4-channel constant current drive circuit). The power supply circuit converts AC power into DC power to supply the constant current drive circuit, and the constant current drive circuit converts the DC power into 4 channels of constant current to supply the main light board and external light strips.

[0066] The rotary switch control circuit is connected to the decoding control circuit. The rotary switch control circuit K1 (see attached diagram) Figure 8 The total power is controlled by K1, which has 5 adjustable levels: level 1 is OFF, level 2 is 25%, level 3 is 50%, level 4 is 75%, and level 5 is 100%. The actual output power is calculated by multiplying the DC-DC1 output, DC-DC3 output, DC-DC4 output by the percentage of K1.

[0067] K2 (see appendix) Figure 9The K2 controller controls the power of DC-DC4. It has 5 adjustable levels: Level 1 is OFF, Level 2 is 25%, Level 3 is 50%, Level 4 is 75%, and Level 5 is 100%. It has higher priority than the K3 spectral formula. For example, the K3 formula is: DC-DC1 output 80%, DC-DC2 output 70%, and DC-DC3 output 60%.

[0068] When DC-DC4 outputs 60%, and K1 is 100% and K2 is 50%, the outputs are: DC-DC1 outputs 80%, DC-DC2 outputs 70%, DC-DC3 outputs 60%, and DC-DC4 outputs 50%.

[0069] K3 (see appendix) Figure 10 The output spectrum formula is K3, which has 5 adjustable levels and can set 5 spectrum formulas. The formula can be customized and edited, and the output values ​​of DC-DC1, DC-DC2, DC-DC3 and DC-DC4 can be configured to output different formulas.

[0070] For example:

[0071] Spectral formulation 1: CW DC-DC1 output 100%; R DC-DC2 output 60%; B DC-DC3 output 0%; UV DC-DC4 output 10%;

[0072] Spectral formulation 2: CW DC-DC1 output 100%; R DC-DC2 output 100%; B DC-DC3 output 0%; UV DC-DC4 output 40%.

[0073] Spectral formulation 3: CW DC-DC1 output 80%; R DC-DC2 output 100%; B DC-DC3 output 0%; UV DC-DC4 output 60%.

[0074] Spectral formulation 4: CW DC-DC1 output 60%; R DC-DC2 output 100%; B DC-DC3 output 0%; UV DC-DC4 output 100%.

[0075] Spectral formulation 5: CW DC-DC1 output 40%; R DC-DC2 output 100%; B DC-DC3 output 0%; UV DC-DC4 output 100% to the decoding control module circuit;

[0076] The decoding control module circuit is connected to the DC-DC 4-channel constant current drive circuit. The decoding control module circuit converts the dimming signal of the knob switch control circuit into a PWM signal and sends it to the DC-DC 4-channel constant current drive circuit to control the drive output of each DC-DC, thereby realizing the control of spectrum changes.

[0077] The decoding control module circuit is connected to the main light board and the external light strip, with... Figure 4 A1 is the main power lamp board detection signal. The lamp board voltage is 54V. Each lamp strip has a 10MΩ resistor. Multiple lamp strips are multiple 10MΩ resistors connected in parallel. The lamp board pull-up resistor is 1MΩ or multiple resistors connected in parallel and the detection resistor R1 (10KΩ) divides the voltage. The voltage signal is connected to the control module for detection. The formula for calculating the number of lamp strips is: lamp board voltage / (lamp board resistance + sampling resistor) * sampling resistor = voltage of 1 lamp strip. The sampled voltage ÷ voltage of 1 lamp strip = number of main lamp strips.

[0078] Appendix Figure 4 A2 in the diagram is the external LED strip detection signal. The lamp board voltage is 54V. Each LED strip has a 10MΩ resistor. Multiple LED strips are multiple 10MΩ resistors connected in parallel. The lamp board pull-up resistor is 1MΩ or multiple resistors connected in parallel and the detection resistor R1 (4.7KΩ) divides the voltage. The voltage signal is connected to the control module for detection. The formula for calculating the number of LED strips is: Lamp board voltage / (lamp board resistance + sampling resistor) * sampling resistor = voltage of 1 LED strip. The sampled voltage ÷ voltage of 1 LED strip = number of external LED strips. The calculation of the output power for LED strip insertion and removal protection is as follows: the main power lamp board can have a maximum of 10 LED strips, and the external LED strips can have a maximum of 20 LED strips. The actual output power of the whole lamp = actual output power of external LED strips + actual output power of the main power lamp board. The actual output power of external LED strips = (formula power) ÷ (20 LED strips) * (number of external strips). The actual output power of the main power lamp board = (formula power) ÷ (10 LED strips) * (number of main LED strips).

[0079] The control panel circuit is connected to the rotary switch control circuit. When the control panel circuit is connected, the rotary switch control circuit becomes ineffective and executes the spectral recipe set by the control panel circuit. The control panel circuit is connected to the rotary switch control circuit via an RS485 signal. The rotary switch control circuit sends the signal to the decoding control module circuit. The decoding control module circuit converts the signal into PWM and sends it to the CDC-DC 4-channel constant current drive circuit to control the power output of the 4-channel DC-DC constant current drive circuit.

[0080] It should be noted that while the preferred embodiments of this utility model are provided in the specification and accompanying drawings, this utility model can be implemented in many different forms and is not limited to the embodiments described in this specification. These embodiments are not intended to impose additional limitations on the content of this utility model; their purpose is to provide a more thorough and comprehensive understanding of the disclosure of this utility model. Furthermore, the above-mentioned technical features can be combined with each other to form various embodiments not listed above, all of which are considered to be within the scope of this utility model specification. Moreover, those skilled in the art can make improvements or modifications based on the above description, and all such improvements and modifications should fall within the protection scope of the appended claims.

Claims

1. A plant light supplementing control circuit, comprising a power supply circuit, a constant current drive circuit, a main light plate, an external light bar, a knob switch control circuit and a decoding control circuit, the power supply circuit is used to convert alternating current into direct current, the constant current drive circuit is used to stably output current to the main light plate and the external light bar according to the instruction of the decoding control circuit, the knob switch control circuit is used to adjust the total power and the output of a specific channel in multiple gears, characterized in that, The main light plate is used for providing adjustable spectrum light compensation to the main light plate, the external hanging light bar is used for providing adjustable spectrum light compensation to the external hanging light bar, the decoding control circuit is used for converting a control instruction into a PWM signal and coordinating the work of each module, the output end of the power supply circuit is connected with the constant current driving circuit, the knob switch control circuit and the decoding control circuit, the output end of the constant current driving circuit is connected with the main light plate and the external hanging light bar, the external hanging light bar is connected with the main light plate, the output end of the knob switch control circuit is connected with the decoding control circuit, and the output end of the decoding control circuit is connected with the constant current driving circuit.

2. The plant light supplement control circuit of claim 1, wherein, The decoding control circuit comprises a signal input module, a master control module, a power management module, a dimming output module and a digital isolation module, the signal input module is used for receiving an external dimming signal, the master control module is used for decoding the external dimming signal and generating a dimming control instruction, the power management module is used for providing a multi-stage stabilized power supply for the master control module and peripheral circuits, the dimming output module is used for outputting a plurality of PWM signals according to the dimming control instruction to drive corresponding light plates, and the digital isolation module is used for realizing electrical isolation. The output end of the signal input module is connected with the master control module, the output end of the master control module is connected with the digital isolation module, the output end of the digital isolation module is connected with the dimming output module, the output end of the dimming output module is connected with the constant current driving circuit, and the power management module is connected with the master control module.

3. The plant light supplement control circuit of claim 2, wherein, The signal input module comprises a chip U1, resistors R8, R9, R10, R11 and R12, diodes D3, D4 and D5, and a capacitor C6, the resistors R8, R9 and R12 are connected with the chip U1, the diodes D3 and D4 are connected with the diode D5, and the capacitor C6 is used for filtering and stabilizing a power voltage to ensure normal work of the chip U1.

4. The plant light supplement control circuit of claim 3, wherein, The master control module comprises a chip N2, resistors R5, R6 and R7, a resistor RD1, a capacitor C7 and a light emitting diode LD1, the resistors R5, R6 and R7 are connected with the chip N2, one end of the light emitting diode LD1 is connected with the resistor RD1, the other end of the light emitting diode LD1 is connected with the chip N2, and the capacitor C7 is used for filtering.

5. The plant light supplementation control circuit of claim 4, wherein, The light-adjusting output module comprises a chip N1, resistors R1, R2, R3 and R4, capacitors C3, C4 and C5, diodes D1 and D2, wherein the resistors R1, R2, R3 and R4, the capacitors C3, C4 and C5, the diode D1 and the diode D2 are connected with the chip N1, the resistors R1, R2, R3 and R4 are a resistor voltage dividing network for converting an external analog signal into a level suitable for processing by the chip N1, the diode D1 is connected in series with the resistor R2, the diode D2 is connected in series with the resistor R3, the capacitors C3 and C5 are used for filtering and reducing high-frequency noise in an input signal, and the capacitor C4 is used for filtering and stabilizing a power supply voltage to ensure normal operation of the chip N1.

6. The plant light supplementation control circuit of claim 5, wherein, The power management module comprises a power supply unit and a power adjustment unit, and the power supply unit and the power adjustment unit are connected.

7. The plant light supplementation control circuit of claim 6, wherein, The power supply unit comprises a chip U3, capacitors C9, C10 and C11, and a resistor R16, the capacitors C9 and C10 are connected in parallel between a pin 1 and a pin 2 of the chip U3, the capacitor C11 is connected in parallel between the pin 2 and a pin 3 of the chip U3, and the resistor R16 is connected with the pin 3 of the chip U3. The power adjustment unit comprises an operational amplifier U2B, resistors R13, R14, R15 and R16, a resistor R17, capacitors C8 and C12, a capacitor CC1, diodes D6 and D7, and a thermistor PTC1, one end of the thermistor PTC1 is connected with the diode D6, the other end of the thermistor PTC1 is connected with the diode D7, the capacitor C8 and the resistor R13 are connected with a pin 5 of the operational amplifier U2B, the resistor R14 is connected in parallel with the capacitor CC1, the resistors R15 and R17 are connected with a pin 6 of the operational amplifier U2B.

8. The plant light supplementation control circuit of claim 7, wherein, The digital isolation module comprises a chip UU1, capacitors C1 and C2, and the capacitors C1 and C2 are used for filtering and stabilizing a power supply voltage to ensure normal operation of the chip UU1.

9. The plant light supplement control circuit of claim 1, wherein, The external lamp strip is connected in parallel with the main lamp panel through a plug-in interface, the external lamp strip comprises a cold and warm light module and a UV light module, and the main lamp panel comprises a cold and warm light module and a blue light module.

10. The plant light supplementation control circuit of claim 1, wherein, The control screen circuit is further provided, which is used for advanced spectral formula setting and system parameter monitoring, and is in communication connection with the knob switch control circuit.

Images