CN113225866B - DMX composite dimming circuit system - Google Patents
DMX composite dimming circuit system Download PDFInfo
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- CN113225866B CN113225866B CN202110407057.3A CN202110407057A CN113225866B CN 113225866 B CN113225866 B CN 113225866B CN 202110407057 A CN202110407057 A CN 202110407057A CN 113225866 B CN113225866 B CN 113225866B
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
- H05B45/10—Controlling the intensity of the light
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
- H05B45/20—Controlling the colour of the light
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/40—Control techniques providing energy savings, e.g. smart controller or presence detection
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Abstract
The invention relates to the technical field of lamp control circuits, in particular to a DMX composite dimming circuit system which comprises a central processing unit, a power supply circuit, a DMX TERMINAL interface, a DMX XLR male-female interface, a DMX RJ45 interface, an RS485 controller, an RS-485 conversion circuit, three input and output wiring ports and three level conversion circuits, wherein the central processing unit is connected with RGBW and CCT toggle selection switches. The invention provides a DMX composite dimming circuit system aiming at the problems in the prior art, which is convenient for a client to use DMX controllers with different interfaces for control, can perform online switching of CCT and RGBW, enables the user to use a color temperature adjusting function, can also switch to dimming functions of RGBW with different colors, and can realize light brightness adjustment under the two functions.
Description
Technical Field
The invention relates to the technical field of lamp control circuits, in particular to a DMX composite dimming circuit system.
Background
At present, LED lighting products are more and more widely required, especially, the LED lighting replaces the use of traditional lighting products, along with the wide application of people, different lighting requirements are provided for different scenes, and especially, people can use the LED lighting in different environments with color-changing temperature and RGBW color-changing dimming. However, most products in the market at present only have single color temperature or color adjustment, the interface is single, the products compatible with the RDM512 protocol are very few, the dimming curve cannot be adjusted and set by themselves, the DMX controller installed with wires has many wires on the wall, the cost is high, the DMX controller is not attractive, the position cannot be adjusted after decoration and installation, and the diversified requirements of customers cannot be met. Most products on the market can not be upgraded on line, and can not meet the requirement of later application upgrading, so that the application range is narrow.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides a DMX composite dimming circuit system which is convenient for a customer to use DMX controllers with different interfaces for control; the CCT and RGBW online switching can be carried out, so that a user can use a color temperature adjusting function and can also switch to a dimming function of RGBW with different colors, and the light brightness can be adjusted under the two functions.
In order to solve the technical problems, the invention adopts the following technical scheme:
the invention provides a DMX composite dimming circuit system which comprises a central processing unit, a power supply circuit, a DMX TERMINAL interface, a DMX XLR male and female interface, a DMX RJ45 interface, an RS485 controller, an RS-485 conversion circuit, three input/output wiring ports and three level conversion circuits, wherein the central processing unit is connected with an RGBW and CCT toggle selection switch; the RS485 controller is respectively connected with the DMX TERMINAL interface, the DMX XLR male-female interface and the DMX RJ45 interface, the DMX TERMINAL interface, the DMX XLR male-female interface and the DMX RJ45 interface are respectively connected with the central processing unit through the RS-485 conversion circuit, the power supply circuit is used for connecting the RS-485 conversion circuit, the three-way level conversion circuit and the central processing unit, the central processing unit is connected with the input end of the three-way level conversion circuit, and the three-way level conversion circuit is connected with an external lamp load through the three-way input and output wiring port.
The central processing unit is also connected with an RJ45 wireless module interface.
The type of the central processing unit is STM32F030RCT6.
The RS-485 conversion circuit comprises a control chip U31, a resistor R19, a resistor R20, a TVS tube ZD1, a resistor R2, a resistor R3, a resistor R8, a resistor R9, a resistor R66, a resistor R67, an MOS tube Q10 and a capacitor C10, wherein one end of the resistor R19 and one end of the resistor R20 are respectively connected with the input end of the control chip U31, the model of the chip U31 is MAX3485ESA, the output end of the control chip U31 is connected with one end of the resistor R2, the other end of the electron R2 is respectively connected with one end of the resistor R3 and one end of the resistor R8, and the other end of the resistor R3 and the other end of the resistor R8 are respectively connected with the input end of the central processing unit;
one end of the TVS tube ZD1 is connected with the control chip U31, and the other end of the TVS tube ZD1 is grounded;
one end of the capacitor C10 is connected with the control chip U31, and the other end of the capacitor C10 is grounded;
one end of the resistor R9 and one end of the resistor R66 are both connected with the RS485 controller, the other end of the resistor R9 is connected with the control chip U31, the other end of the resistor R66 is connected with one end of the resistor R67 and the grid electrode of the MOS transistor Q10, the other end of the resistor R67 is grounded, the source electrode of the MOS transistor Q10 is grounded, and the drain electrode of the MOS transistor Q10 is connected with the control chip U31.
The three-way level conversion circuit comprises a first level conversion circuit, a second level conversion circuit and a third level conversion circuit which are of the same circuit structure, wherein the first level conversion circuit comprises a TVS tube ZD4, a triode Q1, a triode Q2, an MOS tube Q11, an MOS tube Q12, a resistor R25, a resistor R30, a resistor R68, a capacitor C20, a resistor R33, a resistor R32 and a resistor R51, an emitter of the triode Q1 and an emitter of the triode Q2 are connected and then respectively connected with the TVS tube ZD4 and three-way input and output wiring ports, a base of the triode Q1 and a base of the triode Q2 are connected and then respectively connected with one end of the resistor R68 and one end of the capacitor C20, the other end of the capacitor C20 is grounded, a collector of the triode Q1 is connected with one end of the resistor R25, the other end of the resistor R25 is connected with one end of the resistor R30, the other end of the resistor R30 is respectively connected with a drain of the MOS tube Q11, a drain of the resistor R68 and a drain of the MOS tube Q12, a source of the resistor R33 and a source of the resistor R33 are respectively connected with the ground, and a gate of the resistor R32; the other end of the resistor R32 is connected with the central processing unit, the source electrode of the MOS tube Q11 is connected with one end of the resistor R51, the other end of the resistor R51 is connected with the central processing unit, and the grid electrode of the MOS tube Q11 and one end of the resistor R30 are respectively connected with the power supply circuit;
the second level conversion circuit consists of a TVS tube ZD3, a triode Q4, a capacitor C11, a resistor R26, a resistor R69, a resistor R35, a resistor R38, a resistor R37, a resistor R46, an MOS tube Q13 and an MOS tube Q14;
the third level conversion circuit is composed of a TVS tube ZD2, a transistor Q6, a transistor Q7, a capacitor C22, a resistor R27, a resistor R70, a resistor R40, a resistor R28, a resistor R42, a resistor R43, a MOS transistor Q15, and a MOS transistor Q16.
The three-way input and output wiring port comprises an input line wiring terminal T1, an input line wiring terminal T2, an input line wiring terminal T3, an output line wiring terminal T9, an output line wiring terminal T13 and an output line wiring terminal T14; the output line connecting terminal T9, the output line connecting terminal T13 and the output line connecting terminal T14 are respectively connected with an external lamp load; the external constant voltage power supply supplies power to the whole system through the input line wiring terminal T1, the input line wiring terminal T2 and the input line wiring terminal T3.
The central processing unit is connected with a DMX setting dimming curve coding circuit and a DMX setting address coding circuit.
The power supply circuit comprises a 5V voltage-stabilizing power supply circuit and a 3.3V voltage-stabilizing power supply circuit, the 5V voltage-stabilizing power supply circuit comprises a control chip U1, and the model of the control chip U1 is MP9486A; the 3.3V voltage-stabilizing power supply circuit comprises a control chip U6, wherein the model of the control chip U6 is LD1117.
The central processing unit is also respectively connected with a reset circuit, an indicating circuit and an oscillating circuit;
the reset circuit comprises a resistor R18 and a capacitor C12;
the indicating circuit comprises a resistor R29 and a light emitting diode D1;
the oscillation circuit comprises a crystal oscillator Y1, a capacitor C3 and a capacitor C4.
Wherein, the central processing unit is connected with an external expansion port.
The invention has the beneficial effects that:
the invention has ingenious design, has various DMX input interfaces such as DMX XLR, DMX RJ45, DMX TERMINAL and the like, and is convenient for a client to use DMX controllers with different interfaces to control to a great extent; the DMX512 and RDM512 protocols are compatible, so that the application is wider; and under RGBW and CCT stir and select switch structure and set up, can carry out CCT and RGBW's online switching, let the user can use mixing of colors temperature function, can also switch the dimming function of the different colours of RGBWW, the illumination demand of the different application scenes of customer of being convenient for can both realize the regulation of light luminance under two kinds of functions simultaneously, make things convenient for the customer to select a product and realize the demand of various luminance greatly.
Drawings
Fig. 1 is a schematic block diagram of a DMX compound dimming circuit system according to the present invention.
Fig. 2 is a circuit diagram of the power supply circuit of the present invention.
Fig. 3 is a circuit diagram of the cpu of the present invention.
Fig. 4 is a circuit diagram of the RS-485 conversion circuit of the present invention.
Fig. 5 is a circuit diagram of a three-way input-output patch port of the present invention.
Fig. 6 is a circuit diagram of a three-way level shift circuit of the present invention.
Fig. 7 is a circuit diagram of a DMX setting dimming curve coding circuit and a DMX setting address coding circuit according to the present invention.
Fig. 8 is an enlarged view of fig. 7 at a.
Fig. 9 is an enlarged view at B in fig. 7.
Fig. 10 is an enlarged view at C in fig. 7.
Fig. 11 is an enlarged view at D in fig. 7.
Fig. 12 is an enlarged view at E in fig. 7.
Detailed Description
In order to facilitate understanding of those skilled in the art, the present invention will be further described with reference to the following examples and drawings, which are not intended to limit the present invention. The present invention is described in detail below with reference to the attached drawings.
A DMX composite dimming circuit system is shown in figures 1 to 12 and comprises a central processing unit, a power supply circuit, a DMX TERMINAL interface, a DMX XLR male-female interface, a DMX RJ45 interface, an RS485 controller, an RS-485 conversion circuit, three input/output wiring ports and three level conversion circuits, wherein the central processing unit is connected with a WWRGB and CCT toggle selection switch; the RS485 controller is respectively connected with the DMX TERMINAL interface, the DMX XLR male-female interface and the DMX RJ45 interface, the DMX TERMINAL interface, the DMX XLR male-female interface and the DMX RJ45 interface are respectively connected with the central processing unit through the RS-485 conversion circuit, the power supply circuit is used for connecting the RS-485 conversion circuit, the three-way level conversion circuit and the central processing unit, the central processing unit is connected with the input end of the three-way level conversion circuit, and the three-way level conversion circuit is connected with an external lamp load through the three-way input and output wiring port. Specifically, the invention has ingenious design, has various DMX input interfaces such as DMX XLR, DMX RJ45, DMX TERMINAL and the like, and is convenient for a client to control by using DMX controllers with different interfaces to a great extent; the DMX512 and RDM512 protocols are compatible, so that the application is wider; and under RGBW and CCT stir and select switch structure and set up, can carry out CCT and RGBW's online switching, let the user can use mixing of colors temperature function, can also switch the dimming function of the different colours of RGBWW, the illumination demand of the different application scenes of customer of being convenient for can both realize the regulation of light luminance under two kinds of functions simultaneously, make things convenient for the customer to select a product and realize the demand of various luminance greatly.
Wherein, the RS485 controller selects a controller supporting DMX512 protocol to generate 485 control input signal.
In the DMX composite dimming circuit system according to this embodiment, the central processing unit is further connected to an RJ45 wireless module interface. Specifically, the port can be connected with modules such as WIFI, bluetooth Mesh, zigbee, 433M and 2.4G when needed, wireless control is achieved, and wiring is simplified.
In this embodiment, the model of the central processing unit is STM32F030RCT6.
In this embodiment, the RS-485 conversion circuit includes a control chip U31, a resistor R19, a resistor R20, a TVS tube ZD1, a resistor R2, a resistor R3, a resistor R8, a resistor R9, a resistor R66, a resistor R67, an MOS transistor Q10, and a capacitor C10, where one end of the resistor R19 and one end of the resistor R20 are respectively connected to an input end of the control chip U31, the model of the chip U31 is MAX3485ESA, an output end of the control chip U31 is connected to one end of the resistor R2, the other end of the electronic R2 is respectively connected to one end of the resistor R3 and one end of the resistor R8, and the other end of the resistor R3 and the other end of the resistor R8 are respectively connected to an input end of the central processing unit;
one end of the TVS tube ZD1 is connected with the control chip U31, and the other end of the TVS tube ZD1 is grounded;
one end of the capacitor C10 is connected with the control chip U31, and the other end of the capacitor C10 is grounded;
one end of the resistor R9 and one end of the resistor R66 are both connected with the RS485 controller, the other end of the resistor R9 is connected with the control chip U31, the other end of the resistor R66 is connected with one end of the resistor R67 and the grid electrode of the MOS transistor Q10, the other end of the resistor R67 is grounded, the source electrode of the MOS transistor Q10 is grounded, and the drain electrode of the MOS transistor Q10 is connected with the control chip U31.
Specifically, the RS485 controller can provide a control signal to the control chip U31 through any interface, an input signal is transmitted to the conversion chip U31 through the resistor R19 and the resistor R20, and the signal passing through the RS-485 conversion circuit is transmitted to the central processing unit through the resistor R2, the resistor R3 and the resistor R8; the TVS tube ZD1 is used for protecting the chip and preventing the chip from being damaged by external unexpected high level; a resistor R9, a resistor R66, a resistor R67 and an MOS tube Q10 form a head level reset circuit which is used for determining the initial information of the DMX512 data packet; and the capacitor C10 is a bypass filter capacitor and is used for filtering high-frequency interference.
The DMX composite dimming circuit system of this embodiment includes a three-way level conversion circuit, which includes a first level conversion circuit, a second level conversion circuit and a third level conversion circuit having the same circuit structure, where the first level conversion circuit includes a TVS tube ZD4, a transistor Q1, a transistor Q2, a MOS tube Q11, a MOS tube Q12, a resistor R25, a resistor R30, a resistor R68, a capacitor C20, a resistor R33, a resistor R32 and a resistor R51, an emitter of the transistor Q1 and an emitter of the transistor Q2 are connected and then connected to the TVS tube ZD4 and a three-way input/output connection port, a base of the transistor Q1 and a base of the transistor Q2 are connected and then connected to one end of the resistor R68 and one end of the capacitor C20, the other end of the capacitor C20 is grounded, a collector of the transistor Q1 is connected to one end of the resistor R25, the other end of the resistor R25 is connected to one end of the resistor R30, the other end of the resistor R30 is connected to a drain of the MOS tube Q11, the other end of the resistor R68 and the drain of the transistor Q12, and a source of the resistor R33 are connected to the drain of the transistor Q12, and a source of the transistor Q12, and a gate of the resistor R33 are connected to the drain of the transistor Q12; the other end of the resistor R32 is connected with the central processing unit, the source electrode of the MOS transistor Q11 is connected with one end of the resistor R51, the other end of the resistor R51 is connected with the central processing unit, and the grid electrode of the MOS transistor Q11 and one end of the resistor R30 are respectively connected with the power supply circuit; the second level conversion circuit consists of a TVS tube ZD3, a triode Q4, a capacitor C11, a resistor R26, a resistor R69, a resistor R35, a resistor R38, a resistor R37, a resistor R46, an MOS tube Q13 and an MOS tube Q14;
the third level conversion circuit is composed of a TVS tube ZD2, a transistor Q6, a transistor Q7, a capacitor C22, a resistor R27, a resistor R70, a resistor R40, a resistor R28, a resistor R42, a resistor R43, a MOS transistor Q15, and a MOS transistor Q16.
Specifically, taking the first level shift circuit as an example, the resistor R30, the resistor R51 and the MOS transistor Q11 form a level shift circuit, so as to implement level shift from 3.3V to 5V; the converted level controls the external lamp strip through a totem-pole push-pull circuit, and the totem-pole push-pull circuit is composed of a resistor R68, a resistor R14, a resistor R23, a triode Q1 and a triode Q2; the resistor R32, the resistor R33 and the MOS transistor Q12 form a head level reset signal circuit; the TVS tube ZD4 is used for protecting a signal transmission port and avoiding the damage of plugging and accidental voltage spikes to a circuit; the second level shift circuit and the third level shift circuit operate according to the same principle as the first level shift circuit.
In the DMX composite dimming circuit system of this embodiment, the three input/output wiring ports include an input line wiring terminal T1, an input line wiring terminal T2, an input line wiring terminal T3, an output line wiring terminal T9, an output line wiring terminal T13, and an output line wiring terminal T14; the output line connecting terminal T9, the output line connecting terminal T13 and the output line connecting terminal T14 are respectively connected with an external lamp load; the external constant voltage power supply supplies power to the whole system through the input line wiring terminal T1, the input line wiring terminal T2 and the input line wiring terminal T3. Specifically, an external constant voltage power supply supplies power to the whole system through an input line wiring terminal T1, an input line wiring terminal T2 and an input line wiring terminal T3; the DMX controller supplies power to the lamp load with a control function through the output line connection terminal T9, the output line connection terminal T13, and the output line connection terminal T14 and provides a control signal to control the lamp load.
In the DMX composite dimming circuit system of this embodiment, the central processing unit is connected to a DMX setting dimming curve encoding circuit and a DMX setting address encoding circuit. Specifically, the DMX sets the dimming curve encoding circuit: by reading the state of the rotary dial switch U10, the single chip microcomputer calls a corresponding preset function curve to meet the requirement of a user on the change of different dimming curves of the lamp load; DMX sets up the address coding circuit: eight bits are merged into the serial shift registers U15, U16, U17, U18 and U19, and the rotary dial switches U1, U2, U3, U4, U5, U6, U7, U8 and U9 form an address coding circuit; the ceramic capacitors C1, C2, C5, C6, C7 and C8 are VDD bypass filter capacitors for filtering high-frequency interference; the resistors R1-R8, R10-R14, R15-R20, R71, R72, R74-R81, R83-R90 and R92-R95 are pull-down resistors; the rotary dial switch is coded according to an 8421 coding principle, the level of an 8421 pin is low in an initial state, when the switch rotates to a certain value, the corresponding pin is conducted with a public end to present a high level, level signals of the pins are converted by an eight-bit parallel-in serial-out shift register and then transmitted to the single chip microcomputer through a serial port, and the single chip microcomputer transmits corresponding control signals to a lamp load externally connected with a control function so as to realize the functions of dimming and color changing.
In the DMX composite dimming circuit system of this embodiment, the power supply circuit includes a 5V voltage-stabilizing power supply circuit and a 3.3V voltage-stabilizing power supply circuit, the 5V voltage-stabilizing power supply circuit includes a control chip U1, and the control chip U1 is MP9486A in model; the 3.3V voltage-stabilizing power supply circuit comprises a control chip U6, wherein the model of the control chip U6 is LD1117. Specifically, the output voltage of the power supply is filtered by the common-mode inductor FL1, the electrolytic capacitor C21 and the ceramic capacitor C19 and then input to the Vin pin of the control chip U1; the chip U1, the power inductor L2, the freewheeling diode D5 and the electrolytic capacitor C38 form a BUCK main power loop to realize voltage reduction conversion; the resistors R4 and R5 and the chip capacitor C40 form a negative feedback loop, and the duty ratio of an MOS (metal oxide semiconductor) tube in the control chip U1 is adjusted according to the change of the output voltage, so that stable voltage output is realized; the resistors R6 and R7 and the capacitor C9 form an input voltage detection circuit, and when the input voltage is lower than a certain value, undervoltage protection is realized; further, when the 3.3V voltage-stabilizing power supply circuit works, 5V voltage is input to the chip U6 after being filtered by the common-mode inductor FL2 and the capacitor C14, the voltage of 3.3V is output after internal voltage reduction is carried out by the control chip U6, and then the voltage is filtered by the electrolytic capacitor C39 and the ceramic chip capacitor C16 to supply power to a post-stage circuit; the power supply circuit is a common technology, and is not described herein.
In the DMX composite dimming circuit system of this embodiment, the central processing unit is further connected to a reset circuit, an indication circuit, and an oscillation circuit, respectively;
the reset circuit comprises a resistor R18 and a capacitor C12; the resistor R18 and the resistor C12 form a low-level reset circuit;
the indicating circuit comprises a resistor R29 and a light emitting diode D1; the resistor R29 and the light emitting diode D1 form an indicating circuit, and when the central processing unit works normally, the diode D1 is in a flashing indicating state;
the oscillation circuit comprises a crystal oscillator Y1, a capacitor C3 and a capacitor C4; the crystal oscillator Y1, the capacitor C3 and the capacitor C4 form an oscillating circuit to provide a stable external clock for the central processing unit.
In the DMX composite dimming circuit system of this embodiment, the central processing unit is connected to an external expansion port. Specifically, the setting facilitates software burning, debugging and later function expansion.
Although the present invention has been described with reference to the above preferred embodiments, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (8)
1. A DMX composite dimming circuitry, comprising: the system comprises a central processing unit, a power supply circuit, a DMX TERMINAL interface, a DMX XLR male-female interface, a DMX RJ45 interface, an RS485 controller, an RS-485 conversion circuit, three input/output wiring ports and three level conversion circuits, wherein the central processing unit is connected with an RGBW and CCT toggle selection switch; the RS485 controller is respectively connected with the DMX TERMINAL interface, the DMX XLR male-female interface and the DMX RJ45 interface, the DMX TERMINAL interface, the DMX XLR male-female interface and the DMX RJ45 interface are respectively connected with the central processing unit through the RS-485 conversion circuit, the power supply circuit is used for supplying power to the RS-485 conversion circuit, the three-way level conversion circuit and the central processing unit, the central processing unit is connected with the input end of the three-way level conversion circuit, and the three-way level conversion circuit is connected with an external lamp load through the three-way input and output wiring port;
the RS-485 conversion circuit comprises a control chip U31, a resistor R19, a resistor R20, a TVS tube ZD1, a resistor R2, a resistor R3, a resistor R8, a resistor R9, a resistor R66, a resistor R67, an MOS tube Q10 and a capacitor C10, wherein one end of the resistor R19 and one end of the resistor R20 are respectively connected with a seventh pin and a sixth pin of the control chip U31, the other end of the resistor R19 and the other end of the resistor R20 are respectively connected with an RS485 controller, the model of the chip U31 is MAX3485ESA, a first pin of the control chip U31 is connected with one end of the resistor R2, the other end of the resistor R2 is respectively connected with one end of the resistor R3 and one end of the resistor R8, and the other end of the resistor R3 and the other end of the resistor R8 are respectively connected with the input end of the central processing unit;
one end of the TVS tube ZD1 is connected with a seventh pin and a sixth pin of a control chip U31, and the other end of the TVS tube ZD1 is grounded;
one end of the capacitor C10 is connected with an eighth pin of the control chip U31, and the other end of the capacitor C10 is grounded;
one end of a resistor R9 and one end of a resistor R66 are both connected with the RS485 controller, the other end of the resistor R9 is connected with a fourth pin of the control chip U31, the other end of the resistor R66 is connected with one end of a resistor R67 and a grid electrode of the MOS transistor Q10, the other end of the resistor R67 is grounded, a source electrode of the MOS transistor Q10 is grounded, and a drain electrode of the MOS transistor Q10 is connected with the fourth pin of the control chip U31;
the central processing unit is connected with a DMX setting dimming curve coding circuit and a DMX setting address coding circuit;
DMX sets up the address coding circuit: eight bits are merged into the serial shift registers U15, U16, U17, U18 and U19, and the rotary dial switches U1, U2, U3, U4, U5, U6, U7, U8, U9 and U10 form an address coding circuit; the ceramic capacitors C1, C2, C5, C6, C7 and C8 are VDD bypass filter capacitors for filtering high-frequency interference; the resistors R1-R8, R10-R13, R15-R20, R71, R72, R74-R81, R83-R90 and R92-R95 are pull-down resistors;
pins D1, D2, D4 and D8 of the rotary dial switch U1 are respectively connected with one ends of resistors R1-R4, pins D1, D2, D4 and D8 of the rotary dial switch U2 are respectively connected with one ends of resistors R5-R8, and the other ends of the resistors R1-R8 are grounded; one ends of the resistors R1-R4 are respectively connected with an eleventh pin, a twelfth pin, a thirteenth pin and a fourteenth pin of the eight-bit parallel-in serial-out shift register U15; one ends of the resistors R5-R8 are respectively connected with a third pin, a fourth pin, a fifth pin and a sixth pin of the eight-bit parallel-in serial-out shift register U15; the output end of the eight-bit parallel-in serial-out shift register U15 is connected with the input end of the central processing unit; one end of the ceramic capacitor C1 is connected with a sixteenth pin of the eight-bit parallel-in serial-out shift register U15, and the other end of the ceramic capacitor C1 is grounded;
pins D1, D2, D4 and D8 of the rotary dial switch U3 are respectively connected with one ends of resistors R15-R18, pins D1, D2, D4 and D8 of the rotary dial switch U4 are respectively connected with one ends of resistors R10-R13, the other ends of the resistors R15-R18 are grounded, and the other ends of the resistors R10-R13 are grounded; one ends of the resistors R15-R18 are respectively connected with an eleventh pin, a twelfth pin, a thirteenth pin and a fourteenth pin of the eight-bit parallel-in serial-out shift register U16; one ends of the resistors R10-R13 are respectively connected with a third pin, a fourth pin, a fifth pin and a sixth pin of the eight-bit parallel-in serial-out shift register U16; the output end of the eight-bit parallel-in serial-out shift register U16 is connected with the input end of the central processing unit; one end of the ceramic capacitor C2 is connected with a sixteenth pin of the eight-bit parallel-in serial-out shift register U16, and the other end of the ceramic capacitor C2 is grounded;
pins D1, D2, D4 and D8 of the rotary dial switch U5 are respectively connected with one ends of resistors R74-R77, pins D1, D2, D4 and D8 of the rotary dial switch U6 are respectively connected with one ends of resistors R19, R20, R71 and R72, the other ends of the resistors R74-R77 are grounded, and the other ends of the resistors R19, R20, R71 and R72 are grounded; one ends of the resistors R74-R77 are respectively connected with an eleventh pin, a twelfth pin, a thirteenth pin and a fourteenth pin of the eight-bit parallel-in serial-out shift register U17; one ends of the resistors R19, R20, R71 and R72 are respectively connected with a third pin, a fourth pin, a fifth pin and a sixth pin of the eight-bit parallel-in serial-out shift register U17; the output end of the eight-bit parallel-in serial-out shift register U17 is connected with the input end of the central processing unit; one end of the ceramic capacitor C3 is connected with a sixteenth pin of the eight-bit parallel-in serial-out shift register U17, and the other end of the ceramic capacitor C3 is grounded;
pins D1, D2, D4 and D8 of the rotary dial switch U7 are respectively connected with one ends of resistors R83-R86, pins D1, D2, D4 and D8 of the rotary dial switch U8 are respectively connected with one ends of resistors R78-R81, the other ends of the resistors R83-R86 are grounded, and the other ends of the resistors R78-R81 are grounded; one ends of the resistors R83-R86 are respectively connected with an eleventh pin, a twelfth pin, a thirteenth pin and a fourteenth pin of the eight-bit parallel-in serial-out shift register U18; one ends of the resistors R78-R81 are respectively connected with a third pin, a fourth pin, a fifth pin and a sixth pin of the eight-bit parallel-in serial-out shift register U18; the output end of the eight-bit parallel-in serial-out shift register U18 is connected with the input end of the central processing unit; one end of the ceramic capacitor C4 is connected with a sixteenth pin of the eight-bit parallel-in serial-out shift register U18, and the other end of the ceramic capacitor C4 is grounded;
pins D1, D2, D4 and D8 of the rotary dial switch U9 are respectively connected with one ends of resistors R87-R90, pins D1, D2, D4 and D8 of the rotary dial switch U10 are respectively connected with one ends of resistors R92-R95, the other ends of the resistors R87-R90 are grounded, and the other ends of the resistors R92-R95 are grounded; one ends of the resistors R87-R90 are respectively connected with an eleventh pin, a twelfth pin, a thirteenth pin and a fourteenth pin of the eight-bit parallel-in serial-out shift register U19; one ends of the resistors R92-R95 are respectively connected with a third pin, a fourth pin, a fifth pin and a sixth pin of the eight-bit parallel-in serial-out shift register U19; the output end of the eight-bit parallel-in serial-out shift register U19 is connected with the input end of the central processing unit; one end of the ceramic capacitor C5 is connected with a sixteenth pin of the eight-bit parallel-in serial-out shift register U19, and the other end of the ceramic capacitor C5 is grounded;
the rotary dial switch is coded according to the 8421 coding principle, and the 8421 pin level is low in the initial state.
2. The DMX compound dimming circuitry of claim 1, wherein: the central processing unit is also connected with an RJ45 wireless module interface.
3. The DMX compound dimming circuitry of claim 1, wherein: the model of the central processing unit is STM32F030RCT6.
4. The DMX compound dimming circuitry of claim 1, wherein: the three-way level conversion circuit comprises a first level conversion circuit, a second level conversion circuit and a third level conversion circuit which are identical in circuit structure, wherein the first level conversion circuit comprises a TVS tube ZD4, a triode Q1, a triode Q2, a MOS tube Q11, a MOS tube Q12, a resistor R25, a resistor R30, a resistor R68, a capacitor C20, a resistor R33, a resistor R32 and a resistor R51, an emitter of the triode Q1 and an emitter of the triode Q2 are connected and then respectively connected with the TVS tube ZD4 and a three-way input and output wiring port, a base of the triode Q1 and a base of the triode Q2 are connected and then respectively connected with one end of the resistor R68 and one end of the capacitor C20, the other end of the capacitor C20 is grounded, a collector of the triode Q1 is connected with one end of the resistor R25, the other end of the resistor R25 is connected with one end of the resistor R30, the other end of the resistor R30 is respectively connected with a drain of the MOS tube Q11, the other end of the resistor R68 and a drain of the MOS tube Q33, and one end of the resistor R33 are respectively connected with a source of the resistor R32; the other end of the resistor R32 is connected with the central processing unit, the source electrode of the MOS transistor Q11 is connected with one end of the resistor R51, the other end of the resistor R51 is connected with the central processing unit, and the grid electrode of the MOS transistor Q11 and one end of the resistor R30 are respectively connected with the power supply circuit;
the second level conversion circuit consists of a TVS tube ZD3, a triode Q4, a capacitor C11, a resistor R26, a resistor R69, a resistor R35, a resistor R38, a resistor R37, a resistor R46, an MOS tube Q13 and an MOS tube Q14;
the emitter of the triode Q3 and the emitter of the triode Q4 are connected and then respectively connected with the TVS tube ZD3 and the three-way input and output wiring port, the base of the triode Q3 is connected with the base of the triode Q4 and then respectively connected with one end of a resistor R69 and one end of a capacitor C11, the other end of the capacitor C11 is grounded, the collector of the triode Q3 is connected with one end of a resistor R26, the other end of the resistor R26 is connected with one end of a resistor R35, the other end of the resistor R35 is respectively connected with the drain of an MOS tube Q13, the other end of the resistor R69 and the drain of the MOS tube Q14, the source of the MOS tube Q14 is grounded, the gate of the MOS tube Q14 is respectively connected with one end of a resistor R38 and one end of a resistor R37, and the other end of the resistor R38 and the source of the MOS tube Q14 are both grounded; the other end of the resistor R37 is connected with the central processing unit, the source electrode of the MOS transistor Q13 is connected with one end of the resistor R46, the other end of the resistor R46 is connected with the central processing unit, and the grid electrode of the MOS transistor Q13 and one end of the resistor R35 are respectively connected with the power supply circuit;
the third level conversion circuit consists of a TVS tube ZD2, a triode Q6, a triode Q7, a capacitor C22, a resistor R27, a resistor R70, a resistor R40, a resistor R28, a resistor R42, a resistor R43, an MOS tube Q15 and an MOS tube Q16;
the emitter of the triode Q6 and the emitter of the triode Q7 are connected and then respectively connected with the TVS tube ZD2 and the three-way input and output wiring port, the base of the triode Q6 is connected with the base of the triode Q7 and then respectively connected with one end of a resistor R70 and one end of a capacitor C22, the other end of the capacitor C22 is grounded, the collector of the triode Q6 is connected with one end of a resistor R27, the other end of the resistor R27 is connected with one end of a resistor R40, the other end of the resistor R40 is respectively connected with the drain of the MOS tube Q15, the other end of the resistor R70 and the drain of the MOS tube Q16, the source of the MOS tube Q16 is grounded, the gate of the MOS tube Q16 is respectively connected with one end of a resistor R43 and one end of a resistor R42, and the other end of the resistor R43 and the source of the MOS tube Q16 are both grounded; the other end of the resistor R42 is connected with the central processing unit, the source electrode of the MOS transistor Q15 is connected with one end of the resistor R28, the other end of the resistor R28 is connected with the central processing unit, and the grid electrode of the MOS transistor Q15 and one end of the resistor R40 are respectively connected with the power supply circuit.
5. The DMX compound dimming circuitry of claim 1, wherein: the three-way input and output wiring port comprises an input line wiring terminal T1, an input line wiring terminal T2, an input line wiring terminal T3, an output line wiring terminal T9, an output line wiring terminal T13 and an output line wiring terminal T14; the output line connecting terminal T9, the output line connecting terminal T13 and the output line connecting terminal T14 are respectively connected with an external lamp load; the external constant voltage power supply supplies power to the whole system through the input line wiring terminal T1, the input line wiring terminal T2 and the input line wiring terminal T3.
6. The DMX compound dimming circuitry of claim 1, wherein: the power supply circuit comprises a 5V voltage-stabilizing power supply circuit and a 3.3V voltage-stabilizing power supply circuit, the 5V voltage-stabilizing power supply circuit comprises a control chip U1, and the model of the control chip U1 is MP9486A; the 3.3V voltage-stabilizing power supply circuit comprises a control chip U6, wherein the model of the control chip U6 is LD1117.
7. The DMX compound dimming circuitry of claim 1, wherein: the central processing unit is also respectively connected with a reset circuit, an indicating circuit and an oscillating circuit;
the reset circuit comprises a resistor R18 and a capacitor C12; one end of the resistor R18 is connected with one end of the capacitor C12, the other end of the resistor R18 is connected with the central processing unit, and the other end of the capacitor C12 is grounded;
the indicating circuit comprises a resistor R29 and a light emitting diode D1; the cathode of the light-emitting diode D1 is grounded, the anode of the light-emitting diode D1 is connected with one end of a resistor R29, and the central processing unit at the other end of the resistor R29 is connected;
the oscillation circuit comprises a crystal oscillator Y1, a capacitor C3 and a capacitor C4; one end of the capacitor C3 and one end of the capacitor C4 are respectively connected with the central processing unit, the crystal oscillator Y1 is connected between the capacitor C3 and the capacitor C4 in parallel, and the other end of the capacitor C3 and the other end of the capacitor C4 are grounded.
8. The DMX compound dimming circuitry of claim 1, wherein: the central processing unit is connected with an external expansion port.
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| CN210924851U (en) * | 2019-12-20 | 2020-07-03 | 深圳市逸云天电子有限公司 | Multifunctional gas alarm controller |
| CN214960207U (en) * | 2021-04-15 | 2021-11-30 | 东莞华明灯具有限公司 | DMX dimming circuit |
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| CN103136493A (en) * | 2011-11-22 | 2013-06-05 | 苏州艾隆科技有限公司 | Pill case number recognition device |
| CN102843819A (en) * | 2012-06-08 | 2012-12-26 | 上海大学 | Intelligent dimming device and method of LED (light-emitting diode) |
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