CN211606659U

CN211606659U - Remote control anti-interference voice circuit based on NodeMCU

Info

Publication number: CN211606659U
Application number: CN202020696414.3U
Authority: CN
Inventors: 张友东; 陈伟; 汪润妍; 朱宏宇; 朱一凡
Original assignee: Anhui University of Technology AHUT
Current assignee: Anhui University of Technology AHUT
Priority date: 2020-04-29
Filing date: 2020-04-29
Publication date: 2020-09-29
Anticipated expiration: 2030-04-29

Abstract

The utility model discloses an anti-interference voice circuit of remote control based on node MCU belongs to pronunciation broadcast technical field. The device comprises a power supply unit, and a control unit, a trigger unit, a filtering unit and a playing unit which are sequentially connected, wherein the power supply unit supplies power to each unit module; the control unit takes a NodeMCU of an onboard ESP8266 wireless communication module as a main control chip, the ESP8266 wireless communication module on the control unit is connected with a control terminal, and voice playing is triggered by receiving an instruction sent by the control terminal; the trigger unit comprises an IO port level trigger module and an IO port manual knob, the IO port level trigger module is electrically connected with the filter unit, and the IO port manual knob is connected with any two IO ports through the knob in a rotating mode or plays voices through any IO port and the ground. Adopt the technical scheme of the utility model can make the audio playback more stable and clear, simultaneously, the audio frequency quantity greatly increased of broadcast under the manual mode.

Description

Remote control anti-interference voice circuit based on NodeMCU

Technical Field

The utility model belongs to the technical field of the pronunciation broadcast, more specifically say, relate to an anti-interference voice circuit of remote control based on node MCU.

Background

With the development and progress of the times, the speed of information exchange between people is faster and faster. The information transmission mode is various, and the voice broadcast mode is simple and direct, so that the information transmission mode is widely applied. How to manufacture a voice playing module which can be remotely controlled and is anti-interference by utilizing an electronic hardware technology and a communication technology, playing a certain audio frequency stored in the module through remote control, and sending out specific voice to carry out information communication is an important practical requirement in the technical field of remote control voice playing.

In response to this requirement, various voice playing modules are available in the market, and most of them use SD card as medium to store audio files. Common voice playing control modes include a manual control mode and an automatic control mode. The manual control mode mostly adopts an IO port key triggering mode, and any IO port in the mode cannot be freely combined, so that the number of voice files in the memory cannot be too large, the number of required keys is large, and the cost of electronic hardware is high. The automatic control mode mostly adopts a single chip microcomputer for control, and codes are required to be burned into the single chip microcomputer for playing corresponding audio every time, so that the process is complicated. Some remote control voice playing modules in the market mostly use a mode of combining a single chip microcomputer and a communication module, and the mode is not only easily interfered by external signals, but also has high cost and low marketization degree.

Through retrieval, Chinese patent application No. 201822130876.4, the application date is 2018, 12 and 18, the name of the invention is: a voice playing module. The voice playing module of the application comprises a microprocessor, a voice module, a network module, a memory, a power management chip and a communication chip, wherein the voice module comprises a voice driving chip, an audio power amplifier and a voice memory, the voice driving chip, the memory, the power management chip, the communication chip and the network module are connected with the microprocessor, and the audio power amplifier and the voice memory are connected with the voice driving chip. The remote computer controls the playing of the voice by means of the RS485 and RS232 communication to the outside. However, the RS485 bus is a conventional communication bus, which cannot perform automatic arbitration of the bus, and the entire system has low communication efficiency and large data redundancy; and once the host computer fails, the communication of the whole system is limited to a paralyzed state. In addition, RS232 transmission distance is restricted, transmission efficiency is low, and in this application, remote control is realized through the medium of the singlechip, and signal interference generated in the communication process of the computer and the singlechip is also large.

SUMMERY OF THE UTILITY MODEL

1. Problems to be solved

The utility model aims to overcome current pronunciation play device when using, disturb great and install IO mouthful hand movable contact down can not the independent assortment not enough, provide an anti-interference voice circuit of remote control based on node MCU. Adopt the technical scheme of the utility model the above-mentioned problem can be effectively solved, compare in current pronunciation play device, the audio playback is more stable and clear, simultaneously, the audio frequency quantity greatly increased of broadcast under the manual mode.

2. Technical scheme

In order to solve the above problem, the utility model discloses the technical scheme who adopts as follows:

the utility model discloses a remote control anti-interference voice circuit based on NodeMCU, including power supply unit and the control unit, trigger unit, filtering unit, the broadcast unit that link to each other in proper order, power supply unit is each unit module power supply; the control unit takes a NodeMCU of an onboard ESP8266 wireless communication module as a main control chip, the ESP8266 wireless communication module on the control unit is connected with a control terminal, and voice playing is triggered by receiving an instruction sent by the control terminal; the trigger unit comprises an IO port level trigger module and an IO port manual knob, the IO port level trigger module is electrically connected with the filter unit, and the IO port manual knob is connected with any two IO ports through the knob in a rotating mode or plays voices through any IO port and the ground.

Furthermore, the IO port level trigger module of the trigger unit adopts 7 relay groups, each of the 7 relay groups includes 7 single-pole single-throw relays, each relay includes two output terminals, namely a common end and a normally open end, the common end is connected with the input end of the filter unit, and the normally open end is connected with the GND control port of the play unit; the output end of the filtering unit is connected with the voice module trigger input port of the playing unit.

Furthermore, the INPUT end INPUT of the filtering unit is connected with the anode of an amplifier P1, the output end of an amplifier P1 is connected with the cathode of the amplifier P1 through a resistor R1, and a resistor R2 is connected with the cathode of the amplifier P1 after being grounded; the output end of the amplifier P1 is connected with one end of a resistor R3, and the other end of the resistor R3 is connected with one end of a capacitor C1, one end of a capacitor C2 and one end of a resistor R4 respectively; the other end of the capacitor C1 is respectively connected with one end of the resistor R5 and the output end of the amplifier P2; the other end of the capacitor C2 is connected with the other end of the resistor R5 and the negative electrode of the amplifier P2; the other end of the resistor R4 and the anode of the amplifier P2 are both grounded; the capacitor C3, the capacitor C4, the resistor R6 and the resistor R7 are connected in series and then are connected between the output end of the amplifier P2 and the ground in parallel; one end of the capacitor C5 is connected to the junction of the resistor R6 and the resistor R7, and the other end thereof is used as the output terminal OUT of the filter unit.

Furthermore, the manual knob of IO mouth of trigger unit triggers including relay, manual mode selection button and knob, the IO mouth of trigger unit corresponds with the input port that triggers of broadcast unit and is connected, the knob is for including two independent and freely rotatory conductor pointer to all link to each other with manual mode selection button.

Furthermore, a main control chip of the control unit is connected with a peripheral power supply circuit, a download circuit, a reset circuit and a trigger mode selection circuit, wherein in the power supply circuit, a pin VCC and a pin GND of the main control chip are respectively connected with the positive electrode and the negative electrode of an external power supply; the download circuit comprises a serial port chip, and an RXD pin and a TXD pin of the serial port chip are in cross connection with an RXD pin and a TXD pin of the main control chip; the reset circuit comprises an elastic key K1, one end of the elastic key K1 is grounded, and the other end of the elastic key K1 is connected with the RST pin of the main control chip; the trigger mode selection circuit comprises an elastic key K2 and a single-pole single-throw type relay and is connected with the trigger unit.

Furthermore, the serial port chip is preferably CH340 or CP 2102; the single-pole single-throw type relay controls the conduction of a common end and a normally open end of the relay by means of an input low-level trigger signal.

Furthermore, the playing unit comprises a voice module and a loudspeaker, the voice module comprises an MP3 main control IC module, a power amplifier module, an SPI FLASH module, a USB module and a sound sequence display module, and pins of the MP3 main control IC module are respectively connected with pins of the power amplifier module, the SPI FLASH module and the USB module; the pin of the power amplifier module is connected with the pin VMCU of the USB module; and the pins of the sound sequence display module are connected with the pins of the main control chip of the control unit.

Furthermore, the pin of the MP3 master IC module is connected to the anode of the led D1 through the resistor R13, and the cathode of the led D1 is grounded; the SPI FLASH module is also connected with the PC end; the sound sequence display module adopts an IIC communication OLED display screen.

Furthermore, the power supply unit adopts a movable independent power supply module, the power supply module is an LM2596 type DC-DC adjustable buck-boost/voltage-stabilizing integrated circuit, and an external power supply is connected into the module through a front positive electrode interface and a front negative electrode interface.

3. Advantageous effects

Compared with the prior art, the beneficial effects of the utility model are that:

(1) the utility model discloses an anti-interference voice circuit of remote control based on node MCU, including power supply unit and consecutive the control unit, trigger unit, filtering unit, broadcast unit, through filtering unit's setting, the interference that produces when can effective filtering audio playback to make audio playback more stable and clear. In addition, the trigger unit is internally provided with an IO port manual knob, corresponding pins of IO 1-IO 7 of a voice chip are led out in a manual trigger mode to form a ring shape, the ground control special relay temporarily isolates a ground signal of the IO port of the voice chip, and after a user selects a manual mode, the ground control special relay acts again to enable the ground signal of the IO port of the voice chip to be switched on, the audio to be played is selected by rotation of the knob, and through a free combination mode, at most 49 audios can be played by 7 IO ports in the manual mode.

(2) The utility model discloses a remote control anti-interference voice circuit based on NodeMCU, through carrying out the optimal design to the specific circuit structure of filtering unit, thereby on the one hand can effectively filter the interference that the external world produced when the audio frequency broadcast; on the other hand, the signal interference generated by the work of the relay in the circuit can be filtered, the interference and the noise are reduced, and the definition and the stability of audio playing are further improved.

(3) The utility model discloses an anti-interference voice circuit of remote control based on node MCU, control unit are for using board carried ESP8266 wireless communication module's node MCU as core main control chip, utilize outlying power supply circuit, download circuit and reset circuit to constitute ESP8266 nuclear core plate jointly, in addition still including triggering the mode selection circuit. Through the setting of the trigger mode selection circuit, the utility model can realize two play functions of manual control and remote control, namely, the switching is carried out through the small elastic button, the structure is simple, and the operation is convenient; in the actual use process, the voice playing control system can effectively meet the control of engineering technicians on voice playing in two working states of far and near, and has good practicability.

(4) The utility model discloses an anti-interference voice circuit of remote control based on node MCU, the broadcast unit includes voice module and speaker, and this voice module includes MP3 master control IC module, power amplifier module, SPI FLASH module, USB module and sound order display module. The pins of the MP3 master control IC module are connected with the light emitting diodes through the capacitors and are grounded, and when the module is powered on, whether the light emitting diodes twinkle or not can be observed to judge whether the module is good or bad, so that the module is easy to overhaul. Meanwhile, the playing unit is provided with the display module, and the display screen can display the sequence number of the played audio file when a user operates the playing unit, so that the user can know the basic information of the played audio file conveniently, and the voice playing state is more intuitive.

Drawings

Fig. 1 is a system block diagram of a remote control anti-interference voice playing device based on a node mcu of the present invention;

fig. 2 is a system block diagram of the control unit of the present invention;

fig. 3 is a circuit diagram of a control unit of the present invention;

fig. 4 is a schematic diagram of a single-pole single-throw relay of the middle trigger unit of the present invention;

fig. 5 is a circuit diagram of a filtering unit according to the present invention;

fig. 6 is a circuit diagram of IO port level triggering in the trigger unit of the present invention;

fig. 7 is a schematic diagram of a voice module of the playing unit of the present invention;

fig. 8 is a circuit diagram of the manual knob trigger in the trigger unit of the present invention;

fig. 9 is a schematic diagram illustrating the internal components of the voice module of the playing unit according to the present invention;

fig. 10 is a circuit diagram of a main control IC module of MP3 in the voice module of the present invention;

fig. 11 is a circuit diagram of a power amplifier module in the voice module of the present invention;

fig. 12 is a circuit diagram of an SPI FLASH module in the voice module of the present invention;

fig. 13 is a circuit diagram of a USB module in the voice module of the present invention;

fig. 14 is a schematic diagram of a sound sequence display module in the speech module of the present invention.

Detailed Description

The present invention will be further described with reference to the following specific embodiments.

Example 1

As shown in fig. 1, the anti-interference speech control circuit based on the nodmcu in this embodiment includes a power supply unit, and a control unit, a trigger unit, a filter unit, and a play unit that are connected in sequence, where a power supply module of a movable independent power supply adopted by the power supply unit is an LM2596 type DC-DC adjustable buck-boost/voltage-stabilization integrated circuit, an external power supply is connected to the module through a positive-negative electrode interface disposed in front, and after a potentiometer is adjusted to obtain a corresponding output voltage, the external power supply supplies power to each unit, but it is to be noted that the positive and negative electrodes of the input power supply cannot be reversely connected, otherwise, the power supply module is burned out by a short circuit. The control unit takes a NodeMCU of an onboard ESP8266 wireless communication module as a core main control chip, and an ESP8266 core board is formed by utilizing a peripheral power circuit, a download circuit and a reset circuit. Referring to fig. 2, the nodmcu is an internet of things development platform, and includes an ESP8266WiFi module, a serial port, a USB interface, and a control terminal for information interaction with the control terminal, and triggers voice play by receiving an instruction sent from the control terminal, and the control unit is further provided with a trigger mode selection circuit. By setting the trigger mode selection circuit, the utility model can realize two play functions of manual control and remote control, namely, the switching is carried out by the elastic small key, the structure is simple, and the operation is convenient; in the actual use process, the voice playing control system can effectively meet the control of engineering technicians on voice playing in two working states of far and near, and has good practicability.

Specifically, referring to fig. 3, the power supply circuit includes two parts, i.e., an 8-pin VCC and a 9-pin GND, of the ESP8266 communication chip, where the VCC pin is grounded through a capacitor C6 and a capacitor C7, respectively, and an external power supply supplies power to the chip through the two positive and negative pins. The download circuit comprises a serial port chip CH340 or CP2102, an RXD pin and a TXD pin of the serial port chip are in cross connection with an RXD pin and a TXD pin of an ESP8266 communication chip, a USB-to-TTL special download line can be used by a user to connect a USB communication interface of a PC end with a serial port of the chip, and then the user can burn and transplant compiled program codes into the main control chip.

The reset circuit comprises an elastic small key K1, and when the chip is powered on or crashed for the first time, the chip can be reset by actuating the elastic small key K1. The trigger mode selection circuit comprises an elastic small button K2 and a single-pole single-throw type relay. Referring to fig. 4, the single-pole single-throw relay is a comprehensive circuit trigger module integrating a driving circuit and a control circuit, 5 terminals are reserved outside the relay, and are a relay low-level trigger signal input terminal, a power supply VCC input terminal, a power supply GND input terminal, a common output terminal and a normally open output terminal respectively. The user can select a manual knob triggering mode by actuating the small elastic key K2, and the operation is simple and convenient.

The trigger unit comprises IO port level trigger and IO port manual knob trigger, wherein the IO port level trigger adopts 7 relay groups. Referring to fig. 5, the INPUT terminal INPUT of the filter unit is connected to the positive electrode of an amplifier P1, the output terminal of an amplifier P1 is connected to the negative electrode of the amplifier P1 through a resistor R1, the resistor R2 is connected to the ground and then connected to the negative electrode of an amplifier P1, the output terminal of an amplifier P1 is connected to one end of a resistor R3, the other end of the resistor R3 is connected to one end of a capacitor C1, one end of a capacitor C2 and one end of a resistor R4, the other end of a capacitor C1 is connected to one end of a resistor R5 and the output terminal of an amplifier P2, the other end of a capacitor C2 is connected to the other end of the R5 and the negative electrode of the amplifier P2, the other end of the resistor R4 is connected to the ground, the positive electrode, the resistor R6 and the resistor R7 are connected in series and then connected in parallel between the output end of the amplifier P2 and the ground, one end of the capacitor C5 is connected with the junction of the resistor R6 and the resistor R7, and the other end of the capacitor C5 is used as the output end OUT of the filtering unit. Through carrying out optimal design to the concrete circuit structure of filtering unit, on the one hand can effectively carry out the filtering with the interference that external world produced when the audio playback produced. On the other hand, the signal interference generated by the work of the relay in the circuit can be filtered, the interference and the noise are reduced, and the definition and the stability of audio playing are further improved.

Referring to fig. 6, the 7-way relay group includes 7 single-pole single-throw relays, low-level trigger signal INPUT terminals INPUT _ K1-INPUT _ K7 of the 7-way relay group are respectively and correspondingly connected with output terminals of the node mcu, and each output normally-open end _ K1-normally-open end _ K7 of the 7-way relay group is correspondingly connected with voice chip trigger INPUT ports IO 1-IO 7. Referring to fig. 7, when the main control chip sends out a trigger signal, the 7-way relay set starts to work, and the filter circuit filters out signal interference generated by the work of the relay and interference generated by the outside, so that audio playing is more stable and clear.

The manual knob trigger of the IO port adopts a manual trigger special ground control relay, a manual mode selection button and a knob. IO 1-IO 7 triggered by the manual knob are correspondingly connected with trigger input ports IO 1-IO 7 of the voice module U1. As shown in FIG. 8, point O is the rotation axis, and the knob can rotate around point O. The IO 1-IO 7 are triggering input ports 1-7 of the voice chip, and corresponding pins of the IO 1-IO 7 are led out to form a circle as shown in the figure 8. The knob is composed of two independent and freely rotating conductor pointers P3 and P4, and is connected with the manual mode selection key. The knob has two working modes, under the normal state, the knob rotation can drive the conductor pointer P3 to rotate and the conductor pointer P4 does not rotate. In the state that the knob is pressed, the knob is rotated to drive the conductor pointer P4 to rotate and the conductor pointer P3 is not rotated. Two of the 7 IO ports and the ground are selected through rotation of the knob, and the two are connected, so that combination of one of the 7 IO ports and the ground and free combination of any two IO ports can be achieved. The independent mode of the IO ports can be realized by combining one of the 7 IO ports with the ground, and the combined mode of the IO ports can be realized by freely combining any two IO ports. 7 IO ports broadcast pronunciation to the short circuit of ground respectively, and one IO port in 7 IO ports arbitrary two plays pronunciation to another IO port short circuit. As can be seen from the mathematical formula, 49 different voices can be played, and the amount of audio played is increased compared with the existing voice playing board.

The anti-interference voice control circuit of the embodiment has the specific working principle that: the NodeMCU control unit, the trigger unit and the filter unit form a control device of the pair play unit. The trigger unit comprises IO port level trigger and manual knob trigger. In IO port level triggering, a filter circuit is provided, if the playing device is interfered by external signals in the playing process, the filter circuit can filter the interference, so that the audio can be stably played. The remote mobile phone or the computer terminal sends out an instruction, the NodeMCU control unit receives the instruction and sends a certain low level signal to the 7-path relay set through the IO port of the NodeMCU control unit, and the relay switches on the public end and the normally open end of the relay after receiving the signal, so that the voice chip triggers the input port to trigger to the ground, and the playing of a certain audio is realized. In the manual knob triggering process, any one voice chip triggering input port is selected to be directly triggered to the ground through the rotation of the knob, or any two voice chip triggering input ports are selected to be mutually short-circuited to trigger, so that certain audio is played.

Example 2

The main structure of the remote control anti-interference voice circuit based on the nodecms in this embodiment is the same as that in embodiment 1, and the main difference is as follows: the playing unit comprises a JQ8900 voice module and a loudspeaker. With reference to fig. 9, the JQ8900 voice module includes an MP3 main control IC module, a power amplifier module, an SPI FLASH module, a USB module, and a sound sequence display module.

Referring to fig. 10, a pin 1 and a pin 2 of a chip U2 of the MP3 master IC module are respectively connected to a capacitor C11 and a capacitor C10, and a node formed by the connection is connected to a pin 4 of a chip U3 of the power amplifier module through a capacitor C15 and a resistor R14; the pin 3 of the chip U2 of the MP3 master control IC module is grounded through a capacitor C8 after being connected with a power supply of + 3.3V; the 4 feet of the chip U2 of the MP3 master control IC module are connected with the VMCU of the 1 foot of the USB module, and then are grounded through a capacitor C9; the pin 22 and the pin 23 of the chip U2 of the MP3 master control IC module are grounded through a capacitor C13 and a capacitor C12 respectively; the 24 pins of the chip U2 of the MP3 master control IC module are grounded; the 16 feet of the chip U2 of the MP3 master control IC module are connected with a power supply of +3.3V after passing through a resistor R12; the pin 11 of the chip U2 of the MP3 master control IC module is connected with the anode of the light emitting diode D1 after passing through the resistor R13, the cathode of the light emitting diode D1 is grounded, and the D1 flickers once when the module is powered on and then is extinguished, so that the quality of the module is judged.

Referring to fig. 11, the pin 3 and the pin 2 of the chip U3 of the power amplifier module are connected and then grounded through a capacitor C14, the pin 4 of the chip U3 of the power amplifier module is connected with the pin 5 through a resistor R15 to form an SPK-output, and the pin 8 of the chip U3 of the power amplifier module is an SPK + output;

pins

1 and 7 of a chip U3 of the power amplifier module are grounded; the pin 6 of the chip U3 of the power amplification module is connected with the VMCU of the pin 1 of the USB module, and the capacitor C16 and the capacitor C17 are connected between the pin 6 of the chip U3 of the power amplification module and the ground in parallel.

Referring to fig. 12, pins 1 and 6 of the chip U4 of the SPI FLASH module are connected to

pins

12 and 14 of the MP3 main control chip U2, respectively. A pin 2 of a chip U4 of the SPI FLASH module is connected with a pin 5 through a resistor R16, the pin 2 and the pin 5 of the chip U4 of the SPI FLASH module are both connected to a pin 13 of the MP3 main control chip U2, and a pin 7 of a chip U4 of the SPIFLASH module is grounded through a capacitor C18; the 4 pins of the chip U4 of the SPI FLASH module are grounded; the chip U4 of the SPI FLASH module has 8 pins connected with +3.3V power supply. The SPI FLASH is a FLASH storage device that operates through a serial interface, and a user can connect the SPI FLASH to a PC terminal, and the user can change the content stored in the FLASH by operating the PC terminal.

Referring to fig. 13, the 2 pin and the 3 pin of the USB module are respectively connected to the 20 pin and the 21 pin of the MP3 main control chip U2; the 1 pin of the USB module is connected to the 4 pins of the chip U2 of the MP3 main control IC module through a diode D2; and the 5 pins of the USB module are grounded. The user can use the USB to TTL special connecting line to connect the USB interface of PC end with the USB module of chip, and the module can supply power for the play unit after being connected, and can also be used as the interface for communication between PC end and play unit.

Referring to fig. 14, the sound sequence display module adopts a 0.96-inch IIC communication OLED display screen, the display screen has 4 pins in total, wherein the VCC pin is connected to the positive electrode of the power supply by 3.3-5V, the GND pin is grounded, the SCL pin is a serial clock pin, and the SDA pin is a serial data pin. The SCL pin is connected to the 14 pin of the ESP8266 communication chip in fig. 3, which controls when data is transmitted. The SDA pin is connected with the 13 pins of the ESP8266 communication chip in the figure 3 and is used for transmitting data instructions. Through the cooperation of these two pins of SCL and SDA, the serial number of the audio file that can show by the OLED display screen, the person of facilitating the use knows the basic information of the audio file that plays like this, and the pronunciation broadcast state is more directly perceived.

The present invention and its embodiments have been described above schematically, and the description is not limited thereto, and what is shown in the drawings is only one of the embodiments of the present invention, and the actual structure is not limited thereto. Therefore, if the person skilled in the art receives the teaching of the present invention, without departing from the inventive spirit of the present invention, the person skilled in the art should also design the similar structural modes and embodiments without creativity to the technical solution, and all shall fall within the protection scope of the present invention.

Claims

1. The utility model provides an anti-interference voice circuit of remote control based on NodeMCU which characterized in that: the device comprises a power supply unit, and a control unit, a trigger unit, a filtering unit and a playing unit which are sequentially connected, wherein the power supply unit supplies power to each unit module; the control unit takes a NodeMCU of an onboard ESP8266 wireless communication module as a main control chip, the ESP8266 wireless communication module on the control unit is connected with a control terminal, and voice playing is triggered by receiving an instruction sent by the control terminal; the trigger unit comprises an IO port level trigger module and an IO port manual knob, the IO port level trigger module is electrically connected with the filter unit, and the IO port manual knob is connected with any two IO ports through the knob in a rotating mode or plays voices through any IO port and the ground.

2. The NodeMCU based remote control anti-interference voice circuit of claim 1, characterized in that: the IO port level of the trigger unit is triggered by adopting 7 paths of relay groups, each 7 paths of relay groups comprises 7 single-pole single-throw relays, each relay comprises a common end and a normally-open end, the common end of each relay is connected with the input end of the filter unit, and the normally-open end of each relay is connected with the GND control port of the play unit; the output end of the filtering unit is connected with the voice module trigger input port of the playing unit.

3. The NodeMCU based remote control anti-interference voice circuit of claim 2, characterized in that: the INPUT end INPUT of the filter unit is connected with the anode of an amplifier P1, the output end of an amplifier P1 is connected with the cathode of the amplifier P1 through a resistor R1, and the resistor R2 is grounded and then connected with the cathode of the amplifier P1; the output end of the amplifier P1 is connected with one end of a resistor R3, and the other end of the resistor R3 is connected with one end of a capacitor C1, one end of a capacitor C2 and one end of a resistor R4 respectively; the other end of the capacitor C1 is respectively connected with one end of the resistor R5 and the output end of the amplifier P2; the other end of the capacitor C2 is connected with the other end of the resistor R5 and the negative electrode of the amplifier P2; the other end of the resistor R4 and the anode of the amplifier P2 are both grounded; the capacitor C3, the capacitor C4, the resistor R6 and the resistor R7 are connected in series and then are connected between the output end of the amplifier P2 and the ground in parallel; one end of the capacitor C5 is connected to the junction of the resistor R6 and the resistor R7, and the other end thereof is used as the output terminal OUT of the filter unit.

4. The NodeMCU based remote control anti-interference voice circuit of claim 3, wherein: the manual knob of IO mouth of trigger unit triggers including ground accuse special relay, manual mode selection button and knob, the IO mouth of trigger unit corresponds with the trigger input port of broadcast unit and is connected, the knob is for including two independent and freely rotatory conductor pointer to all link to each other with manual mode selection button.

5. A NodeMCU based remote control anti-jamming speech circuit according to any of claims 1-4, characterized by: a main control chip of the control unit is connected with a peripheral power supply circuit, a download circuit, a reset circuit and a trigger mode selection circuit, wherein in the power supply circuit, a pin VCC and a pin GND of the main control chip are respectively connected with the positive electrode and the negative electrode of an external power supply; the download circuit comprises a serial port chip, and an RXD pin and a TXD pin of the serial port chip are in cross connection with an RXD pin and a TXD pin of the main control chip; the reset circuit comprises an elastic key K1, one end of the elastic key K1 is grounded, and the other end of the elastic key K1 is connected with the RST pin of the main control chip; the trigger mode selection circuit comprises an elastic key K2 and a single-pole single-throw type relay and is connected with the trigger unit.

6. The NodeMCU based remote control anti-interference voice circuit of claim 5, wherein: the serial port chip is preferably CH340 or CP 2102; the single-pole single-throw type relay controls the conduction of a common end and a normally open end of the relay by means of an input low-level trigger signal.

7. The NodeMCU based remote control anti-interference voice circuit of claim 6, characterized in that: the playing unit comprises a voice module and a loudspeaker, the voice module comprises an MP3 main control IC module, a power amplifier module, an SPI FLASH module, a USB module and a sound sequence display module, and pins of the MP3 main control IC module are respectively connected with pins of the power amplifier module, the SPI FLASH module and the USB module; the pin of the power amplifier module is connected with the pin VMCU of the USB module; and the pins of the sound sequence display module are connected with the pins of the main control chip of the control unit.

8. The NodeMCU based remote control anti-interference voice circuit of claim 7, wherein: the pin of the MP3 master control IC module is connected with the anode of the light emitting diode D1 through the resistor R13, and the cathode of the light emitting diode D1 is grounded; the SPI FLASH module is also connected with the PC end; the sound sequence display module adopts an IIC communication OLED display screen.

9. The NodeMCU based remote control anti-interference voice circuit of claim 8, wherein: the power supply unit adopts a movable independent power supply module, the power supply module is an LM2596 type DC-DC adjustable buck-boost/voltage-stabilization integrated circuit, and an external power supply is connected into the power supply module through a preposed positive and negative electrode interface.