CN210629920U

CN210629920U - 24-channel DMX decoder based on DMX-to-PWM control

Info

Publication number: CN210629920U
Application number: CN201921567221.1U
Authority: CN
Inventors: 石小锋
Original assignee: Shenzhen City Jingmei Electronic Technology Co ltd
Current assignee: Shenzhen City Jingmei Electronic Technology Co ltd
Priority date: 2019-09-19
Filing date: 2019-09-19
Publication date: 2020-05-26
Anticipated expiration: 2029-09-19

Abstract

The utility model discloses a 24 passageway DMX decoder based on DMX changes PWM control, it is through converting DMX512 signal into SPI signal earlier, and the LED driver of two 12 passageways of rethread converts this SPI signal into 24 way PWM signals to the realization is controlled a plurality of stage lamps and lanterns. Specifically, the 24-channel DMX decoder includes a power supply filtering and voltage stabilizing circuit, which is sequentially connected with a DMX512 signal receiving circuit, a microcontroller, a display circuit, a signal conversion circuit, a 24-channel driving circuit, and provides working voltage for each circuit module. The signal conversion circuit comprises two 12-channel LED drivers which are connected, and the output end of each LED driver is externally connected with two six-channel phase inverters. The 24-channel driving circuit comprises 24 field effect transistors FDD6670, and the input end of each field effect transistor is connected with the output end of the corresponding inverter.

Description

24-channel DMX decoder based on DMX-to-PWM control

Technical Field

The utility model relates to a technical field of LED controller, in particular to 24 passageway DMX decoders based on DMX changes PWM control.

Background

The DMX512 decoder can convert DMX512/1990 standard digital control signals into PWM control signals, so that common LED lamp decorative lighting without a decoding function is controlled by a DMX512 main console, the DMX512 decoder is widely applied to the field of LED lighting at present, and the existing stage lamp is controlled by the MDMX512 decoder. However, most of the existing DMX512 decoders are 3 channels or 4 channels, and if a plurality of lamps need to be controlled, a plurality of decoders need to be connected for control, which is high in cost and large in power consumption.

SUMMERY OF THE UTILITY MODEL

To the problem that prior art exists, the utility model discloses a main objective provides a 24 passageway DMX decoder based on DMX changes PWM control, and it has 24 output channels, can control a plurality of lamps and lanterns simultaneously.

In order to achieve the above object, the utility model provides a 24 passageway DMX decoder based on DMX changes PWM control, including DMX512 signal reception circuit, microcontroller, dial switch circuit, display circuit, signal conversion circuit, 24 passageway drive circuit to and provide operating voltage's power filter voltage stabilizing circuit for each circuit module. The output end of the DMX512 signal receiving circuit is connected with the first output end of the microcontroller, and the output end of the dial switch circuit is connected with the second input end of the microcontroller. And the first output end of the microcontroller is connected with the display circuit. The signal conversion circuit comprises two 12-channel LED drivers which are connected, the output end of each LED driver is externally connected with two six-channel phase inverters, and the second output end of the microcontroller is connected with the input end of the LED driver. The 24-channel driving circuit comprises 24 field effect transistors FDDs 6670, and input ends of the field effect transistors are connected with output ends of the phase inverters.

Preferably, the DMX512 signal receiving circuit includes a 485 communication chip SN75176, the pin No. 6 and pin No. 7 of the 485 communication chip are externally connected with the DMX512 differential signal, the pin No. 6 is grounded through a resistor R27 and a diode D2, respectively, and the pin No. 7 is grounded through a resistor R1 and a diode D1. No. 1 pin of the 485 communication chip outputs SPI signal recognizable by the microcontroller, No. 2, No. 3 and No. 5 pins of the 485 communication chip are grounded, and the No. 5 pin is connected with VDD power supply through a capacitor C5.

Preferably, the microcontroller is a single chip microcomputer STM8S003, a pin 3 of the microcontroller is connected with the output end of the DMX512 signal receiving circuit, a pin 18 of the microcontroller is connected with the output end of the dial switch circuit,

pins

13 and 14 of the microcontroller are connected with the input end of the LED driver, and

pins

10, 13 and 14 of the microcontroller are connected with the input end of the display circuit.

Pin 4 of the microcontroller is connected to VDD voltage through resistor R31 and to ground through capacitor C9. Pin 7 of the microcontroller is connected to ground, pin 8 is connected to VDD through C11, and pin 9 is connected to VDD.

Preferably, the display circuit comprises a nixie tube display chip TM1618 and eight segments of common cathode nixie tubes, and the input end of the nixie tube display chip is connected with the second output end of the microcontroller through a connector and is connected to the VDD voltage. The output end of the voltage regulator is connected with the input end of the eight-section common cathode nixie tube.

Preferably, the LED driver is a constant current LED driving chip MBI6024, wherein pins No. 2 and No. 3 of one constant current LED driving chip are connected to the first output terminal of the microcontroller, and pins No. 5 and No. 6 of the constant current LED driving chip are connected to pins No. 2 and No. 3 of the other constant current LED driving chip.

The phase inverter is a six-phase inverter 74HC04, the input end of the six-phase inverter is connected with the output end of the corresponding constant current LED driving chip, and the output end of the six-phase inverter is connected with the input end of the field effect tube.

Preferably, the power supply filtering voltage stabilizing circuit comprises a voltage stabilizing chip XL1509, a pin 1 of the voltage stabilizing chip is connected with a VIN voltage, and is respectively connected with a VCC1 voltage and a VCC2 voltage through a diode D1 and a diode D2, and is grounded through a parallel circuit formed by C12 and C13.

The No. 2 pin of the voltage stabilization chip outputs VDD voltage through an inductor L1, the first end of the inductor also passes through a diode D5, the second end of the inductor is grounded through a capacitor C14, and the inductor is connected with the No. 3 pin of the voltage stabilization chip.

And the No. 4-5 pin of the voltage stabilizing chip is grounded.

The technical scheme of the utility model through earlier with DMX512 signal conversion for SPI signal, the LED driver of two 12 passageways of rethread converts this SPI signal into 24 way PWM signals, can realize a plurality of stage lamps and lanterns of simultaneous control, and control mode is simple, control cost is low.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.

Fig. 1 is a schematic block diagram of an embodiment of a 24-channel DMX decoder based on DMX to PWM control according to the present invention;

FIG. 2 is a circuit schematic of a DMX512 signal receiving circuit;

FIG. 3 is a circuit schematic of a microcontroller;

FIG. 4 is a circuit schematic of a display circuit;

FIG. 5 is a schematic circuit diagram of the connection of two MBI6024 chips;

FIG. 6 is a circuit schematic of four six inverters 74HC 04;

FIG. 7 is a circuit schematic of a 24-channel drive circuit;

FIG. 8 is a schematic circuit diagram of a power supply filtering and voltage stabilizing circuit;

the purpose of the present invention is to provide a novel and improved method and apparatus for operating a computer.

Detailed Description

The utility model provides a 24 passageway DMX decoder based on DMX changes PWM control.

Referring to fig. 1, fig. 1 is a schematic block diagram of an embodiment of a 24-channel DMX decoder based on DMX to PWM control according to the present invention.

As shown in fig. 1, in the embodiment of the present invention, the 24-channel DMX decoder based on DMX to PWM control includes a DMX512 signal receiving circuit 100, a microcontroller 200, a dial switch circuit 300, a display circuit 400, a signal conversion circuit 500, a 24-channel driving circuit 600, and a power supply filtering voltage stabilizing circuit for providing operating voltage for each circuit module.

The DMX512 signal receiving circuit 100 is configured to receive an external DMX512 differential signal, and convert the DMX512 differential signal into an SPI signal recognizable to the microprocessor. Specifically, as shown in fig. 2, the DMX512 signal receiving circuit 100 includes a 485 communication chip SN75176, pin 6 and pin 7 of the 485 communication chip are externally connected with a DMX512 differential signal, the pin 6 is grounded through a resistor R27 and a diode D2, respectively, and the pin 7 is grounded through a resistor R1 and a diode D1. Pin 1 of the 485 communication chip outputs SPI signal recognizable by the microcontroller 200,

pins

2, 3, and 5 are grounded, and pin 5 is connected to VDD power supply via capacitor C5.

Dial switch circuit 300 is used to set the control mode, and microcontroller 200 is used to decode DMX512 and output SPI signal in the control mode according to the control mode set by the dial switch. Specifically, as shown in fig. 3, the microcontroller 200 is a single chip microcomputer STM8S003, a pin 3 of the microcontroller 200 is connected to an output terminal of the DMX512 signal receiving circuit 100, a pin 18 thereof is connected to an output terminal of the dial switch circuit 300,

pins

13 and 14 thereof are connected to input terminals of the LED driver, and

pins

10, 13 and 14 thereof are connected to input terminals of the display circuit 400. Pin No. 4 of microcontroller 200 is connected to VDD voltage through resistor R31 and to ground through capacitor C9. Pin 7 of microcontroller 200 is connected to ground, pin 8 is connected to VDD via C11, and pin 9 is connected to VDD.

The display circuit 400 is used for displaying an address corresponding to a control mode set by the dial switch, so as to conveniently adjust the control mode. Specifically, as shown in fig. 4, the display circuit 400 includes a display module formed by a nixie tube display chip TM1618 and eight segments of cascode nixies tubes, an input end of the nixie tube display chip is connected to the second output end of the microcontroller 200 through a connector, and is connected to the VDD voltage, and an output end of the nixie tube display chip is connected to an input end of the eight segments of cascode nixies tubes.

Signal conversion circuit 500 is used to convert the SPI signal output by microcontroller 200 into a PWM signal for controlling the lamp. The signal conversion circuit 500 includes a signal conversion module 510 composed of two 12-channel LED drivers and a signal inversion module 520 composed of four six-channel inverters, the output end of each LED driver is externally connected with two six-channel inverters, the second output end of the microcontroller 200 is connected with the input end of one of the LED drivers, and the output end of each LED driver is externally connected with two six-channel inverters. Specifically, as shown in fig. 5, the LED driver is a constant current LED driving chip MBI6024, in which pins No. 2 and No. 3 of one constant current LED driving chip are connected to the first output terminal of the microcontroller 200, and pins No. 5 and No. 6 of the constant current LED driving chip are connected to pins No. 2 and No. 3 of the other constant current LED driving chip. As shown in fig. 6, the inverter is a six-phase inverter 74HC04, an input end of the six-phase inverter is connected to an output end of the corresponding constant current LED driving chip, and an output end of the six-phase inverter is connected to an input end of the field effect transistor. The constant current LED driving chip MBI6024 can invert the phase of the output PWM signal, and prevent the PWM signal from being distorted during long-distance transmission, so that the signal transmission quality is enhanced.

As shown in fig. 7, the 24-channel driving circuit 600 includes 24 fets FDD6670, whose inputs are connected to the output of the inverter and receive the PWM signal, and whose outputs are connected to the cathode input of the stage light fixture 700.

As shown in FIG. 8, the power supply filtering voltage stabilizing circuit comprises a voltage stabilizing chip XL1509, wherein a pin 1 of the voltage stabilizing chip is connected with a VIN voltage, and is respectively connected with a VCC1 voltage and a VCC2 voltage through a diode D1 and a diode D2, and is grounded through a parallel circuit formed by a capacitor C12 and a capacitor C13. The pin 2 of the voltage stabilizing chip outputs the VDD voltage through the inductor L1, the first end of the inductor also passes through the diode D5, the second end of the inductor is grounded through the capacitor C14, and the inductor is connected with the pin 3 of the voltage stabilizing chip. Pin 4-5 of the voltage stabilization chip is grounded.

The technical scheme of the utility model through earlier with DMX512 signal conversion for SPI signal, the LED driver of two 12 passageways of rethread converts this SPI signal into 24 way PWM signals, can realize a plurality of stage lamps and lanterns 700 of simultaneous control, and control mode is simple, control cost is low.

And the utility model provides a DMX decoder has the wide voltage input of high DC5-DC24V, under DC5V operating voltage, its maximum output is 180W (totally 24 way, every way maximum output current 3A, maximum power 15W), under DC24V operating voltage, its maximum output is 1728W (totally 24 way, every way maximum output current 3A, maximum power 72W).

The above only be the preferred embodiment of the utility model discloses a not consequently restriction the utility model discloses a patent range, all are in the utility model discloses a conceive, utilize the equivalent structure transform of what the content was done in the description and the attached drawing, or direct/indirect application all is included in other relevant technical field the utility model discloses a patent protection within range.

Claims

1. A24-channel DMX decoder based on DMX-to-PWM control is characterized by comprising a DMX512 signal receiving circuit, a microcontroller, a dial switch circuit, a display circuit, a signal conversion circuit, a 24-channel drive circuit and a power supply filtering voltage stabilizing circuit for providing working voltage for each circuit module; the output end of the DMX512 signal receiving circuit is connected with a first output end of the microcontroller, and the output end of the dial switch circuit is connected with a second input end of the microcontroller; the first output end of the microcontroller is connected with the display circuit; the signal conversion circuit comprises two 12-channel LED drivers which are connected, the output end of each LED driver is externally connected with two six-channel inverters, and the second output end of the microcontroller is connected with the input end of the LED driver; the 24-channel driving circuit comprises 24 field effect transistors FDDs 6670, and input ends of the field effect transistors are connected with output ends of the phase inverters.

2. The DMX to PWM control based 24-channel DMX decoder of claim 1, wherein the DMX512 signal receiving circuit comprises a 485 communication chip SN75176, pins No. 6 and No. 7 of the 485 communication chip are externally connected with DMX512 differential signals, the pin No. 6 is respectively connected with a resistor R27 and a diode D2 and is grounded, the pin No. 7 is connected with VDD voltage through a resistor R1 and is grounded through a diode D1; no. 1 pin of the 485 communication chip outputs SPI signal recognizable by the microcontroller, No. 2, No. 3 and No. 5 pins of the 485 communication chip are grounded, and the No. 5 pin is connected with VDD power supply through a capacitor C5.

3. The DMX-to-PWM control based 24-channel DMX decoder according to claim 1, wherein the microcontroller is a single chip microcomputer STM8S003, pin 3 of the microcontroller is connected to an output terminal of the DMX512 signal receiving circuit, pin 18 thereof is connected to an output terminal of the dial switch circuit, pins 13 and 14 thereof are connected to an input terminal of the LED driver, and pins 10, 13 and 14 thereof are connected to an input terminal of the display circuit;

the No. 4 pin of the microcontroller is connected with VDD voltage through a resistor R31 and is grounded through a capacitor C9; pin 7 of the microcontroller is connected to ground, pin 8 is connected to VDD through C11, and pin 9 is connected to VDD.

4. The DMX-to-PWM control based 24-channel DMX decoder of claim 1 wherein the display circuit includes a type of a nixie tube display chip TM1618 and eight segments of common cathode nixie tubes, the input terminal of the nixie tube display chip is connected to the second output terminal of the microcontroller via a connector and is connected to VDD voltage; the output end of the voltage regulator is connected with the input end of the eight-section common cathode nixie tube.

5. The DMX to PWM control based 24-channel DMX decoder according to claim 1, wherein the LED driver is a constant current LED driving chip MBI6024, in which pins No. 2 and No. 3 of one constant current LED driving chip are connected to the first output terminal of the microcontroller, and pins No. 5 and No. 6 of the constant current LED driving chip are connected to pins No. 2 and No. 3 of another constant current LED driving chip;

6. The DMX to PWM control based 24-channel DMX decoder of any of claims 1-5, wherein the power supply filtering voltage regulator circuit comprises a voltage regulator chip XL1509, pin 1 of the voltage regulator chip is connected with VIN voltage and is connected with VCC1 voltage and VCC2 voltage through a diode D1 and a diode D2, respectively, and is connected with ground through a parallel circuit formed by C12 and C13;

the No. 2 pin of the voltage stabilizing chip outputs VDD voltage through an inductor L1, the first end of the inductor also passes through a diode D5, the second end of the inductor is grounded through a capacitor C14 and is connected with the No. 3 pin of the voltage stabilizing chip;

and the No. 4-5 pin of the voltage stabilizing chip is grounded.