CN113613146B - Intelligent sound box with control circuit - Google Patents

Intelligent sound box with control circuit Download PDF

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Publication number
CN113613146B
CN113613146B CN202110962997.9A CN202110962997A CN113613146B CN 113613146 B CN113613146 B CN 113613146B CN 202110962997 A CN202110962997 A CN 202110962997A CN 113613146 B CN113613146 B CN 113613146B
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integrated chip
capacitor
pin
resistor
circuit
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CN113613146A (en
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庄建龙
李和娟
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Shenzhen Haituo Tiancheng Technology Co ltd
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Shenzhen Haituo Tiancheng Technology Co ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R3/00—Circuits for transducers, loudspeakers or microphones
    • H04R3/12—Circuits for transducers, loudspeakers or microphones for distributing signals to two or more loudspeakers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/06—Receivers
    • H04B1/16—Circuits
    • 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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Otolaryngology (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Headphones And Earphones (AREA)
  • Circuit For Audible Band Transducer (AREA)

Abstract

The invention discloses an intelligent sound box with a control circuit, which comprises an MIC circuit, a peripheral interface, a binaural Bluetooth module, a power circuit, a man-machine interface, an external SD card interface, an external FLASH module, a power amplifier circuit and an FM circuit; the dual-channel Bluetooth module is internally integrated with an MCU, signals collected by FM in the power amplifier circuit are sent to the MCU after being tidied by the dual-power amplifier circuit, the MIC circuit receives audio signals and outputs the audio signals to the MCU, and the MCU sends out the processed signals through FM or amplifies the processed signals through the power amplifier circuit and then the processed signals are played by a loudspeaker; according to the invention, through measuring the analog signal of the ADKEY, adjusting the mode, the signal collected by the FM is sent to the MCU for processing after being tidied by the double-power amplification circuit, the Bluetooth data, the FM audio and the signal output of the circuit early warning can be controlled by the digital microphone, and the RTC6218FM radio chip is adopted, so that the broadcasting listening function is increased, and the digital microphone has good market application value.

Description

Intelligent sound box with control circuit
Technical Field
The invention relates to the technical field of intelligent household equipment, in particular to an intelligent sound box with a control circuit.
Background
With the development of the smart home industry, many home hotels and some public service industries are replacing traditional equipment with intelligent control equipment, in a conventional scheme, a control panel is mainly used, but with the development of communication technology, intelligent sound box equipment is started to perform man-machine conversation, so that intelligence is realized. But current intelligent control audio amplifier has the inhomogeneous and easy resonance phenomenon's of public address direction problem, and the condition that the electricity snap appears easily on the earphone and the screen appears twinkling moreover, therefore, prior art exists the defect, needs to improve.
Disclosure of Invention
The invention provides an intelligent sound box with a control circuit, which comprises an MIC circuit, a peripheral interface, a binaural Bluetooth module, a power circuit, a man-machine interface, an external SD card interface, an external FLASH module, a power amplifier circuit and an FM circuit, wherein the power circuit is connected with the power amplifier circuit; the dual-channel Bluetooth module is internally integrated with an MCU, signals collected by FM in the power amplifier circuit are sent to the MCU after being tidied by the dual-power amplifier circuit, the MCU controls the MIC circuit to send out FM audio, a digital microphone of the MIC circuit is used for outputting Bluetooth data, FM audio and signals of circuit early warning, an earphone and a USB interface are reserved on a peripheral interface, the power supply circuit is used for supplying power to the loudspeaker box during the period that the USB interface is used for charging the loudspeaker box, or the USB is used for directly supplying power to the loudspeaker box, and the man-machine interface is used for measuring analog signals of ADKEY and adjusting modes; the FM circuit adopts an RTC6218FM radio chip, and a broadcasting listening function is added.
Preferably, the model of the integrated chip U2 is CW6631B SSOP28, and the pin 25 and the pin 23 of the integrated chip U2 are respectively connected to the first end and the second end of the capacitor C31.
The double-channel Bluetooth module comprises an integrated chip U2, capacitors C4-C13, inductors L2-L4 and a crystal oscillator tube Y1; the three pins and the five pins of the integrated chip U2 are respectively connected with the second end of the capacitor C4 and the second end of the capacitor C9, the pin 4 of the integrated chip U2 is respectively connected with the first ends of the capacitor C4 and the capacitor C9, the first ends of the capacitors C5, C6, C8, C10, C11 and C13 are sequentially and correspondingly connected with the pins 25, 24, 23, 22, 19 and 16 of the integrated chip U2, the pin 21 of the integrated chip U2 is respectively connected with the first end of the crystal oscillator tube Y1 and the first end of the capacitor C7, the pin 20 of the integrated chip U2 is respectively connected with the second end of the crystal oscillator tube Y1 and the first end of the capacitor C12, the second ends of the capacitors C5-C8 are grounded, the inductors L2-L3 are connected at two ends of the inductor L4 in parallel, the first end of the inductor L4 is connected with the pin 17 of the integrated chip U2, and the second ends of the inductors L2 and L3 are grounded.
The preferred scheme, power supply circuit includes USB1 and hard switch circuit, charge indicator circuit is connected to USB 1's pin 1, USB 1's pin 2 and 4 connect integrated chip U2's pin AUX, USB 1's pin 3 and 5 connect power BT1, power BT1 provides 3.4V-4.2V's voltage for power supply circuit, charge indicator circuit comprises diode D2, D3 and triode Q1, the first end of resistor R14 is connected to triode Q1's base, diode D3's positive pole is connected to triode Q1's collecting electrode, USB 1's pin 1 is connected to triode Q1's projecting pole, integrated chip's pin 22 is connected to hard switch circuit.
In a preferred scheme, the power amplifier circuit comprises an integrated chip U5 and an integrated chip U4, pins 1, 4 and 6 of the integrated chip U5 are respectively connected with pins 2, 7 and 22 of the integrated chip U2, pins 1 and 6 of the integrated chip U4 are respectively connected with pins 2 and 22 of the integrated chip U2, pins 8 and 5 of the integrated chip U5 are respectively connected with a first port and a second port of a connector J4, pin 4 of the integrated chip U4 is connected with a second end of a resistor R17 and a first end of a resistor R18, a second end of the resistor R18 is connected with pin 5 of the integrated chip U4, pin 4 of the integrated chip U5 is respectively connected with a first end of a resistor R38 and a second end of a resistor R37, a first end of the resistor R37 is connected with a capacitor C36, a capacitor C47 and a resistor R34 in parallel, a first end of the capacitor C36 is respectively connected with a second end of the resistor C33 and C34, and a first end of the resistor R36 is respectively connected with a second end of the capacitor C44, and the first end of the capacitor C44 is connected with a first end of the resistor R4 is the integrated chip U2.
In a preferred scheme, the reserved earphone and the USB interface include connectors J2 and US82, the port 1 of the connector J2 is connected with the second end of the resistor R7 on the man-machine interface, the ports 2, 3 and 4 of the connector J2 are respectively connected with the first end of the capacitor C35, the first end of the capacitor C14 and the ground, the second end of the capacitor C35 is connected with the pin 4 of the integrated chip U4, the second end of the capacitor C14 is connected with the first end of the capacitor C33, the pins 1, 2 and 3 of the USB2 are correspondingly connected with the pins 22, 27 and 26 of the integrated chip U2, and the pins 4, 5 and 6 of the USB2 are all grounded.
Preferably, the MIC circuit includes a digital microphone M1, a capacitor C15, a capacitor C20, and a resistor R13; the first end of the capacitor C15 is connected with the pin 5 of the integrated chip U2 and the first end of the resistor R13, the second end of the resistor R13 is respectively connected with the first end of the capacitor C20 and the first end of the digital microphone M1, the second end of the capacitor C20 is connected with the pin 2 of the integrated chip U2, the second end of the digital microphone M1 and the second end of the capacitor C15 are grounded, and the pin 9 and the pin 25 of the integrated chip U2 are respectively connected with the second end and the first end of the resistor R1 on a human-computer interface.
Preferably, the FM circuit comprises an integrated chip U1, an inductor L1, a capacitor C3 and a resistor R4; the pin 1 of integrated chip U1 connects the second end of electric capacity C1, the second end of inductance L1 is connected to the first end of electric capacity C1, the pin 6 of integrated chip U1 connects the second end of electric capacity C3 and the first end of resistance R4 respectively, the first end ground connection of electric capacity C3, the pin 25 of integrated chip U2 is connected to the second end of resistance R4, integrated chip U1's model is RTC6218 or QN8065.
The preferred scheme, external SD card interface includes connector J1, connector J1's port 3, 4, 5, 7 are connected with integrated chip U2's pin 10, 25, 12, 11 respectively, external FLASH module includes integrated chip U3, integrated chip U2's pin 15, 13, 25 and 14 are connected respectively to integrated chip U3's pin 1, 2, 3, 6, integrated chip U3's pin 5 is connected with integrated chip U2's pin 13, integrated chip U3 is SPI FLASH.
The beneficial effects are that:
according to the invention, the mode can be adjusted by measuring the analog signal of the ADKEY, the signals collected by the FM are processed by the MCU through the double-power amplification circuit and then sent to the MCU for processing, the Bluetooth data and the FM audio can be controlled through the digital microphone, and the signal output of the circuit early warning adopts the RTC6218FM radio chip, so that the broadcasting listening function is increased.
Drawings
FIG. 1 is a diagram of the overall circuit configuration;
FIG. 2 is a diagram of a two-channel Bluetooth module circuit configuration;
FIG. 3 is a circuit diagram of a power supply circuit;
FIG. 4 is a diagram of a power amplifier circuit configuration;
FIG. 5 is a diagram of a peripheral interface circuit configuration;
FIG. 6 is a circuit diagram of a MIC circuit;
FIG. 7 is a diagram of an FM circuit wiring configuration;
FIG. 8 is a circuit diagram of an external SD card interface;
FIG. 9 is a circuit diagram of an external FLASH module;
fig. 10 is a diagram of a human-machine interface circuit configuration.
Detailed Description
In order that the invention may be readily understood, a more particular description thereof will be rendered by reference to specific embodiments that are illustrated in the appended drawings. The preferred embodiments of the present invention are illustrated in the drawings, but the present invention can be embodied in many different forms and is not limited to the embodiments described in the present specification. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
It will be understood that when an element is referred to as being "fixed to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like are used herein for illustrative purposes only.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.
The working method comprises the following steps:
the circuit measures an analog signal of the ADKEY through a human interface and adjusts a mode; the integrated chip is adopted to integrate MCU, for MCU+Bluetooth chip, come to control whole intelligent audio amplifier through the Bluetooth chip, after the signal that FM was collected passes through the arrangement of dual amplifier circuit simultaneously, send the signal to MCU, send FM audio frequency by MCU control MIC circuit, simultaneously concatenate electric capacity at MCU's pin VDDIO and RVDD and be used for eliminating earphone power-on sound and flash screen problem, signal output such as bluetooth data and FM audio frequency and circuit early warning through digital microphone, still reserve earphone and USB interface on intelligent audio amplifier simultaneously, switch is through USB interface for intelligent audio amplifier charging period, the pilot lamp lights, perhaps directly pass through the USB interface for intelligent audio amplifier power supply, external SD screens inserts the SD card, be used for broadcasting music function, the RTC6218FM radio chip of adoption has increased the function of listening to the broadcasting.
Embodiment one:
as shown in FIG. 1, the intelligent sound box with the control circuit comprises a MIC circuit, a peripheral interface, a binaural Bluetooth module, a power supply circuit, a man-machine interface, an external SD card interface, an external FLASH module, a power amplifier circuit and an FM circuit; the dual-channel Bluetooth module is internally integrated with an MCU, signals collected by FM in the power amplifier circuit are sent to the MCU after being tidied by the dual-power amplifier circuit, the MCU controls the MIC circuit to send out FM audio, a digital microphone of the MIC circuit is used for outputting Bluetooth data, FM audio and signals of circuit early warning, an earphone and a USB interface are reserved on a peripheral interface, the power supply circuit is used for supplying power to the loudspeaker box during the period that the USB interface is used for charging the loudspeaker box, or the USB is used for directly supplying power to the loudspeaker box, and the man-machine interface is used for measuring analog signals of ADKEY and adjusting modes; the FM circuit adopts an RTC6218FM radio chip, and a broadcasting listening function is added.
As shown in fig. 1, the model of the integrated chip U2 is CW6631B SSOP28, and the pin 25 and the pin 23 of the integrated chip U2 are respectively connected to the first end and the second end of the capacitor C31 correspondingly; the capacitor C31 connected in series with VDDIO and RVDD is used for eliminating the problems of power-on and screen flashing of the earphone.
As shown in FIG. 2, the binaural Bluetooth module comprises an integrated chip U2, capacitors C4-C13, inductors L2-L4 and a crystal oscillator tube Y1; the three pins and the five pins of the integrated chip U2 are respectively connected with the second end of the capacitor C4 and the second end of the capacitor C9, the pin 4 of the integrated chip U2 is respectively connected with the first ends of the capacitor C4 and the capacitor C9, the first ends of the capacitors C5, C6, C8, C10, C11 and C13 are sequentially correspondingly connected with the pins 25, 24, 23, 22, 19 and 16 of the integrated chip U2, the pin 21 of the integrated chip U2 is respectively connected with the first end of the crystal oscillator tube Y1 and the first end of the capacitor C7, the pin 20 of the integrated chip U2 is respectively connected with the second end of the crystal oscillator tube Y1 and the first end of the capacitor C12, the second ends of the capacitors C5-C8 are grounded, the inductors L2-L3 are connected with the two ends of the inductor L4 in parallel, the first ends of the inductor L4 are connected with the pin 17 of the integrated chip U2, the second ends of the inductors L2 and L3 are grounded, and the crystal oscillator matching capacitor C7 and C12 are arranged in a place close to the crystal oscillator tube at a place of 75KHz according to Bluetooth crystal oscillator parameters.
As shown in fig. 3, the power supply circuit includes a USB1 and a hard switch circuit, pin 1 of the USB1 is connected with a charge indicator light circuit, pins 2 and 4 of the USB1 are connected with pin AUX of the integrated chip U2, pins 3 and 5 of the USB1 are connected with a power supply BT1, the power supply BT1 provides 3.4V-4.2V for the power supply circuit, the charge indicator light circuit is composed of diodes D2 and D3 and a triode Q1, a base of the triode Q1 is connected with a first end of a resistor R14, a collector of the triode Q1 is connected with an anode of the diode D3, an emitter of the triode Q1 is connected with pin 1 of the USB1, the hard switch circuit is connected with pin 22 of the integrated chip, and it is confirmed whether the power supply circuit is supplying power to the intelligent sound box through the charge indicator light circuit, and meanwhile, the hard switch circuit is also set, and the power supply is controlled through a single-pole double-throw switch on the hard switch circuit.
As shown in fig. 4, the power amplifier circuit includes an integrated chip U5 and an integrated chip U4, pins 1, 4 and 6 of the integrated chip U5 are respectively connected with pins 2, 7 and 22 of the integrated chip U2, pins 1 and 6 of the integrated chip U4 are respectively connected with pins 2 and 22 of the integrated chip U2, pins 8 and 5 of the integrated chip U5 are respectively connected with a first port and a second port of the connector J4, pin 4 of the integrated chip U4 is connected with a second end of the resistor R17 and a first end of the resistor R18, a second end of the resistor R18 is connected with pin 5 of the integrated chip U4, pin 4 of the integrated chip U5 is respectively connected with a first end of the resistor R38 and a second end of the resistor R37, a first end of the resistor R37 is connected with a capacitor C36, a capacitor C47 and a resistor R34 in parallel, a first end of the capacitor C36 is respectively connected with a second end of the resistor C33 and C34, a first end of the resistor R36 is connected with a second end of the capacitor C33 and a second end of the resistor C34, a second end of the capacitor C44 is connected with a first end of the resistor R44, and a resistor C4 is selected according to the model of the integrated chip U2 and the model of the integrated chip U4 is low.
As shown in fig. 5, the reserved earphone and USB interface includes connectors J2 and US82, the port 1 of the connector J2 is connected to the second end of the resistor R7 on the man-machine interface, the ports 2, 3, 4 of the connector J2 are respectively connected to the first end of the capacitor C35, the first end of the capacitor C14 and ground, the second end of the capacitor C35 is connected to the pin 4 of the integrated chip U4, the second end of the capacitor C14 is connected to the first end of the capacitor C33, the pins 1, 2, 3 of the USB2 are correspondingly connected to the pins 22, 27, 26 of the integrated chip U2, and the pins 4, 5, 6 of the USB2 are all grounded.
As shown in fig. 6, the MIC circuit includes a digital microphone M1, a capacitor C15, a capacitor C20, and a resistor R13; the first end of the capacitor C15 is connected with the pin 5 of the integrated chip U2 and the first end of the resistor R13, the second end of the resistor R13 is respectively connected with the first end of the capacitor C20 and the first end of the digital microphone M1, the second end of the capacitor C20 is connected with the pin 2 of the integrated chip U2, the second end of the digital microphone M1 and the second end of the capacitor C15 are grounded, and the pin 9 and the pin 25 of the integrated chip U2 are respectively connected with the second end and the first end of the resistor R1 on a human-computer interface.
As shown in fig. 7, the FM circuit includes an integrated chip U1, an inductor L1, a capacitor C3, and a resistor R4; the pin 1 of integrated chip U1 connects the second end of electric capacity C1, the second end of inductance L1 is connected to the first end of electric capacity C1, the pin 6 of integrated chip U1 connects the second end of electric capacity C3 and the first end of resistance R4 respectively, the first end ground connection of electric capacity C3, the pin 25 of integrated chip U2 is connected to the second end of resistance R4, integrated chip U1's model is RTC6218 or QN8065.
As shown in fig. 8, the external SD card interface includes a connector J1, ports 3, 4, 5, 7 of the connector J1 are respectively connected with pins 10, 25, 12, 11 of the integrated chip U2, the external FLASH module includes an integrated chip U3, pins 1, 2, 3, 6 of the integrated chip U3 are respectively connected with pins 15, 13, 25, and 14 of the integrated chip U2, pin 5 of the integrated chip U3 is connected with pin 13 of the integrated chip U2, and the integrated chip U3 is an SPI FLASH.
What is not described in detail in this specification is prior art known to those skilled in the art.
The above-described features are continuously combined with each other to form various embodiments not listed above, and are regarded as the scope of the present invention described in the specification; and, it will be apparent to those skilled in the art from this disclosure that modifications and variations can be made without departing from the scope of the invention defined in the appended claims.

Claims (8)

1. The intelligent sound box with the control circuit is characterized by comprising an MIC circuit, a peripheral interface, a binaural Bluetooth module, a power supply circuit, a man-machine interface, an external SD card interface, an external FLASH module, a power amplifier circuit and an FM circuit; the dual-channel Bluetooth module is internally integrated with an MCU, signals collected by FM in the power amplifier circuit are sent to the MCU after being tidied by the dual-power amplifier circuit, the MIC circuit receives audio signals and outputs the audio signals to the MCU, and the MCU sends out the processed signals through FM or amplifies the processed signals through the power amplifier circuit and then the processed signals are played by a loudspeaker; the earphone and the USB interface are reserved on the peripheral interface, the power supply circuit is used for supplying power to the loudspeaker box during the period that the USB port charges the loudspeaker box or the USB directly supplies power to the loudspeaker box, and the man-machine interface is used for measuring analog signals of the ADKEY and adjusting the mode; the FM circuit adopts an RTC6218FM radio chip, and a broadcasting listening function is added; the power amplifier circuit comprises an integrated chip U5 and an integrated chip U4, pins 1, 4 and 6 of the integrated chip U5 are respectively connected with pins 8, 7 and 22 of the integrated chip U2, pins 1 and 6 of the integrated chip U4 are respectively connected with pins 8 and 22 of the integrated chip U2, pins 8 and 5 of the integrated chip U5 are respectively connected with a first port and a second port of a connector J4, the pin 4 of the integrated chip U4 is connected with a second end of a resistor R17 and a first end of a resistor R18, the second end of the resistor R18 is connected with a pin 5 of the integrated chip U4, the pin 4 of the integrated chip U5 is respectively connected with a first end of a resistor R38 and a second end of a resistor R37, the first end of the resistor R37 is connected with a capacitor C36, a capacitor C47 and a resistor R34 in parallel, the first end of the capacitor C36 is connected with a second end of the resistor R36, the first end of the resistor R36 is respectively connected with a second end of the capacitor C33 and C44, the second end of the first end of the capacitor C44 is connected with the first end of the resistor R44, and the first end of the resistor R4 is connected with the first end of the resistor R4, and the resistor R4 is the integrated chip U2, and the integrated chip U2 is the model number of U2 is 800.
2. The intelligent sound box with the control circuit according to claim 1, wherein the binaural Bluetooth module comprises an integrated chip U2, capacitors C4-C13, inductors L2-L4 and a crystal oscillator tube Y1; the three pins and the five pins of the integrated chip U2 are respectively connected with the second end of the capacitor C4 and the second end of the capacitor C9, the pin 4 of the integrated chip U2 is respectively connected with the first ends of the capacitor C4 and the capacitor C9, the first ends of the capacitors C5, C6, C8, C10, C11 and C13 are sequentially and correspondingly connected with the pins 25, 24, 23, 22, 19 and 16 of the integrated chip U2, the pin 21 of the integrated chip U2 is respectively connected with the first end of the crystal oscillator tube Y1 and the first end of the capacitor C7, the pin 20 of the integrated chip U2 is respectively connected with the second end of the crystal oscillator tube Y1 and the first end of the capacitor C12, the second ends of the capacitors C5-C8 are grounded, the inductors L2-L3 are connected at two ends of the inductor L4 in parallel, the first end of the inductor L4 is connected with the pin 17 of the integrated chip U2, and the second ends of the inductors L2 and L3 are grounded.
3. The intelligent sound box with the control circuit according to claim 2, wherein the model of the integrated chip U2 is CW6631B SSOP28, and the pin 25 and the pin 23 of the integrated chip U2 are connected in series with the first end and the second end of the capacitor C31.
4. The intelligent sound box with the control circuit according to claim 1, wherein the power supply circuit comprises a USB1 and a hard switch circuit, a pin 1 of the USB1 is connected with a charge indicator circuit, pins 2 and 4 of the USB1 are connected with a pin AUX of the integrated chip U2, pins 3 and 5 of the USB1 are connected with a power supply BT1, the power supply BT1 provides 3.4V-4.2V for the power supply circuit, the charge indicator circuit is composed of diodes D2 and D3 and a triode Q1, a base electrode of the triode Q1 is connected with a first end of a resistor R14, a collector electrode of the triode Q1 is connected with an anode of the diode D3, an emitter electrode of the triode Q1 is connected with the pin 1 of the USB1, and the hard switch circuit is connected with a pin 22 of the integrated chip.
5. The intelligent sound box with the control circuit according to claim 1, wherein the reserved earphone and the USB interface comprise a connector J2 and a USB2, a port 1 of the connector J2 is connected with a second end of a resistor R7 on the man-machine interface, ports 2, 3 and 4 of the connector J2 are respectively connected with a first end of a capacitor C35, a first end of a capacitor C14 and ground, a second end of the capacitor C35 is connected with a pin 4 of an integrated chip U4, a second end of the capacitor C14 is connected with a first end of a capacitor C33, pins 1, 2 and 3 of the USB2 are correspondingly connected with pins 22, 27 and 26 of the integrated chip U2, and pins 4, 5 and 6 of the USB2 are all grounded.
6. The intelligent sound box with the control circuit according to claim 1, wherein the MIC circuit comprises a digital microphone M1, a capacitor C15, a capacitor C20 and a resistor R13; the first end of the capacitor C15 is connected with the pin 5 of the integrated chip U2 and the first end of the resistor R13, the second end of the resistor R13 is respectively connected with the first end of the capacitor C20 and the first end of the digital microphone M1, the second end of the capacitor C20 is connected with the pin 2 of the integrated chip U2, the second end of the digital microphone M1 and the second end of the capacitor C15 are grounded, and the pin 9 and the pin 25 of the integrated chip U2 are respectively connected with the second end and the first end of the resistor R1 on a human-computer interface.
7. The intelligent sound box with the control circuit according to claim 1, wherein the FM circuit comprises an integrated chip U1, an inductor L1, a capacitor C3 and a resistor R4; the pin 1 of integrated chip U1 connects the second end of electric capacity C1, the second end of inductance L1 is connected to the first end of electric capacity C1, the pin 6 of integrated chip U1 connects the second end of electric capacity C3 and the first end of resistance R4 respectively, the first end ground connection of electric capacity C3, the pin 25 of integrated chip U2 is connected to the second end of resistance R4, integrated chip U1's model is RTC6218 or QN8065.
8. The intelligent sound box with control circuit according to claim 1, wherein the external SD card interface comprises a connector J1, ports 3, 4, 5, 7 of the connector J1 are respectively connected with pins 10, 25, 12, 11 of an integrated chip U2, the external FLASH module comprises an integrated chip U3, pins 1, 2, 3, 6 of the integrated chip U3 are respectively connected with pins 15, 13, 25 and 14 of the integrated chip U2, pin 5 of the integrated chip U3 is connected with pin 13 of the integrated chip U2, and the integrated chip U3 is SPI FLASH 。
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