CN216486025U - Multifunctional digital clock system mainboard - Google Patents
Multifunctional digital clock system mainboard Download PDFInfo
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- CN216486025U CN216486025U CN202123052096.0U CN202123052096U CN216486025U CN 216486025 U CN216486025 U CN 216486025U CN 202123052096 U CN202123052096 U CN 202123052096U CN 216486025 U CN216486025 U CN 216486025U
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Abstract
A multifunctional digital clock system mainboard comprises a temperature and humidity detection unit, a real-time clock unit, a chip storage unit, a Flash storage unit, an LCD display unit, a voice unit, a GSM communication unit and a lithium battery power supply unit, wherein the temperature and humidity detection unit is electrically connected with a main control chip and is used for collecting temperature and humidity data of the environment; the utility model discloses a be equipped with GSM communication unit and adopt GSM communication mode to realize remote communication, be equipped with independent chip memory cell and Flash memory cell with the storage data to solve the problem that can't carry out remote communication, can't the storage data that current multi-functional digital clock exists.
Description
Technical Field
The utility model relates to a digital clock technical field, concretely relates to multi-functional digital clock system mainboard.
Background
With the improvement of living standard of people, the traditional clock can not meet the increasing diversified demands of people due to single function. The existing multifunctional digital clock has the main problems that: the wireless communication adopts a WIFI or Bluetooth mode, and remote communication cannot be carried out; without a separate memory, data cannot be stored.
SUMMERY OF THE UTILITY MODEL
In order to overcome the defects of the prior art, the utility model aims at providing a multifunctional digital clock system mainboard, be equipped with GSM communication unit and adopt GSM communication mode to realize remote communication, be equipped with independent chip memory cell and Flash memory cell with the storage data to solve the problem that can't carry out remote communication, can't the storage data that current multifunctional digital clock exists.
In order to achieve the above purpose, the utility model adopts the technical scheme that: the utility model provides a multi-functional digital clock system mainboard, includes main control chip, and:
the temperature and humidity detection unit is used for acquiring temperature and humidity data of an environment and transmitting the temperature and humidity data to the main control chip for processing and analysis;
the real-time clock unit is used for providing a clock for the main control chip so as to realize a function related to time;
the chip storage unit is used for storing the data transmitted to the remote server by the main control chip and the data transmitted to the main control chip by the remote server;
the Flash storage unit is used for storing the temperature and humidity data processed and analyzed by the main control chip;
the LCD display unit is used for displaying the data transmitted by the main control chip on an LCD display screen;
the voice unit is used for broadcasting the data transmitted by the main control chip through a loudspeaker in a voice mode;
the GSM communication unit is used for data transmission between the main control chip and a remote server through a mobile network;
the lithium battery power supply unit is used for providing power for the main control chip;
the main control chip is electrically connected with the temperature and humidity detection unit, the real-time clock unit, the chip storage unit, the Flash storage unit, the LCD display unit, the voice unit, the GSM communication unit and the lithium battery power supply unit respectively; the master control chip realizes network proofreading time through a remote server;
the main control chip is an MCU (micro controller unit), the model of the main control chip is MSP430F47187, a high-precision AD sampling module and a calculation module are arranged in the main control chip, and a temperature and humidity compensation function is integrated, so that temperature and humidity data measurement data can be more accurate; the external portion of the main control chip is provided with a data acquisition interface, a clock interface, a storage interface, a Flash interface, an LCD display interface, a voice interface, a GSM interface and a power interface so as to be connected with the temperature and humidity detection unit, the real-time clock unit, the chip storage unit, the Flash storage unit, the LCD display unit, the voice unit, the GSM communication unit and the lithium battery power supply unit.
The working principle of the multifunctional digital clock system mainboard is as follows:
the temperature and humidity detection unit transmits the temperature and humidity data of the collected environment to the main control chip, the main control chip transmits the temperature and humidity data after processing and analysis to the Flash storage unit for storage, and the main control chip transmits the temperature and humidity data after processing and analysis to the LCD display screen for display on one hand and carries out voice broadcast through the voice unit and the loudspeaker on the other hand; the real-time clock unit provides a clock for the main control chip to realize the functions related to time, such as log, perpetual calendar, timed uploading data and the like; the main control chip is used for transmitting data with the remote server through the GSM communication unit, processing and analyzing the received data transmitted by the remote server, transmitting the data to the chip storage unit for storage on the one hand, and transmitting the data after processing and analyzing, such as weather forecast (on the same day or three days or one week in the future), city day PM2.5 value, world city time and the like on the one hand, transmitting the data to the LCD display screen for display through the LCD display unit on the one hand, and performing voice broadcast through the speaker through the voice unit on the one hand.
Further, the GSM communication unit includes: the 4G module U1A, the GPRS antenna interface X1, the SIM card connector U13, the inductor L1, the inductor L2, the schottky diode TV8, the schottky diode TV9, the schottky diode T10, the schottky diode T11, the capacitor C27, the capacitor C28, the capacitor C29, the capacitor C30, the resistor R1, the resistor R12, the resistor R11, the resistor R73, the resistor R74, and the resistor R75; the model of the 4G module U1A is EC600S-CN, and is compatible with a 2G GSM communication system; the SIM card connector U13 is used for inserting a SIM card so that the 4G module U1A transmits and receives data through a SIM card connecting mobile network, and the model of the SIM card connector U13 is MUP-C783; the GPRS antenna interface X1 is used for connecting a GPRS antenna to realize wireless communication;
Further, the speech unit includes: the voice chip U2A, the speaker LS, a capacitor C1, a capacitor C2, a capacitor C3, a capacitor C4, a capacitor C6, a capacitor C8, a resistor R7, a resistor R8, a resistor R1, a resistor R2, a resistor R3 and a resistor R4; the model of the voice chip U2A is ISD 1420; pin 26 ground connection of pronunciation chip U2A, connect power supply voltage VCC after the pin 16 and the pin 28 of pronunciation chip U2A link to each other, connect after the pin 13 and the pin 12 of pronunciation chip U2A link to each other ground connection behind the one end of electric capacity C2, another termination power supply voltage VCC of electric capacity C2, the pin 14 of pronunciation chip U2A is connected the positive pole of speaker LS, the pin 15 of pronunciation chip U2A is connected the negative pole of speaker LS, the pin 20 of pronunciation chip U2A is connected the one end of electric capacity C3, the pin 21 of pronunciation chip U2A is connected the one end of resistance R1, the other end of electric capacity C3 is connected the other end of resistance R1, the pin 24 of pronunciation chip U2A is connected the one end of electric capacity C4, the pin 17 of pronunciation chip U2A is connected the one end of electric capacity C8, the other end of electric capacity C4 is connected respectively the one end of resistance R3 and the other end C8 of electric capacity C8, the other end of electric capacity C8 still connects resistance R4's the other end, connect behind resistance R4's the other end ground connection electric capacity C1's one end, electric capacity C1's the other end with connect power supply voltage VCC after resistance R3's the other end links to each other, pronunciation chip U2A's pin 19 is connected respectively resistance R2's one end with electric capacity C6's one end, resistance R2's the other end with electric capacity C6's the other end links to each other the back ground connection, pronunciation chip U2A's pin 23 is connected connect behind resistance R8's one end connect the voice interface of main control chip, pronunciation chip U2A's pin 24 is connected connect behind resistance R7's one end connect the voice interface of main control chip, resistance R7's the other end with connect power supply voltage VCC after resistance R8's the other end links to each other end.
Further, the real-time clock unit includes: the circuit comprises a clock chip U1, a crystal oscillator X1, a MOS transistor Q1, a super capacitor CE1, a capacitor C1, a capacitor C2, a resistor R1, a resistor R3, a resistor R4 and a resistor R5; the model of the clock chip U1 is DS 1337; pin 1 of the clock chip U1 is connected to one end of the crystal oscillator X1, pin 2 of the clock chip U1 is connected to the other end of the crystal oscillator X1, pin 3 of the clock chip U1 is sequentially connected to one end of the capacitor C1, the anode of the super capacitor CE1, one end of the resistor R1, and the S-pole of the MOS transistor Q1, the anode of the super capacitor CE1 is further connected to the base power voltage VBB, pin 4 of the clock chip U1 is connected to the other end of the capacitor C1 and the cathode of the super capacitor CE1 and then grounded, the other end of the resistor R1 is connected to the G-pole of the MOS transistor Q1 and then connected to the enable end EN, the D-pole of the MOS transistor Q1 is connected to the circuit voltage 3.3V, pin 8 of the clock chip U1 is sequentially connected to the circuit voltage 3.3V, one end of the capacitor C2, one end of the resistor R3, one end of the resistor R4 and one end of the resistor R5, the other end of the capacitor C2 is grounded, a pin 7 of the clock chip U1 is connected with the other end of the resistor R3, a pin 6 of the clock chip U1 is connected with the other end of the resistor R4 and then connected with a clock interface of the main control chip, and a pin 5 of the clock chip U1 is connected with the other end of the resistor R5 and then connected with the clock interface of the main control chip.
Further, the temperature and humidity detection unit includes: a temperature and humidity sensor interface J14, a resistor R110 and a resistor R111; the temperature and humidity sensor interface J14 is used for connecting an external temperature and humidity sensor to obtain a sampling signal of the external temperature and humidity sensor and transmitting the collected sampling signal of the external temperature and humidity sensor to the main control chip; a pin 4 of the temperature and humidity sensor interface J14 is grounded, a pin 3 of the temperature and humidity sensor interface J14 is connected to one end of the resistor R111 and the data acquisition interface of the main control chip respectively, a pin 2 of the temperature and humidity sensor interface J14 is connected to one end of the resistor R110 and the data acquisition interface of the main control chip respectively, and the other end of the resistor R111 and the other end of the resistor R110 are connected and then connected to a pin 1 and a terminal of the temperature and humidity sensor interface J14 respectively; and the pin 1, the pin 2, the pin 3 and the pin 4 of the temperature and humidity sensor interface J14 are also connected with an external temperature and humidity sensor.
Further, the chip memory unit includes: a large-capacity memory chip U11, a capacitor C35 and a resistor R144; the model number of the mass storage chip U11 is 24LC1025 SN; a pin 1 and a pin 2 of the large-capacity storage chip U11 are connected and then grounded, a pin 3 of the large-capacity storage chip U11 is connected with a power supply 3.3V, a pin 4 of the large-capacity storage chip U11 is grounded, a pin 5 of the large-capacity storage chip U11 is connected with a storage interface of the main control chip, a pin 6 of the large-capacity storage chip U11 is connected with the storage interface of the main control chip, a pin 7 of the large-capacity storage chip U11 is connected with one end of a resistor R144, the other end of the resistor R144 is connected with the power supply 3.3V, a pin 8 of the large-capacity storage chip U11 is respectively connected with the power supply 3.3V and one end of a capacitor C35, and the other end of the capacitor C35 is grounded;
further, the Flash storage unit includes: a serial flash memory U14, a resistor R106, a resistor R107, and a resistor R143; the model of the serial flash memory U14 is MX25L 1605E; pin 1 of serial Flash memory U14 connects the one end of resistance R107, pin 8 of serial Flash memory U14 connects respectively the other end of resistance R107, power 3.3V and the one end of resistance R106, pin 7 of serial Flash memory U14 connects the other end of resistance R106, pin 4 ground connection of serial Flash memory U14, pin 5 of serial Flash memory U14 connects the Flash interface of main control chip, pin 6 of serial Flash memory U14 connects the Flash interface of main control chip, pin 2 of serial Flash memory U14 connects the Flash interface of main control chip, pin 3 of serial Flash memory U14 connects the one end of resistance R143, the other end ground connection of resistance R143.
Further, the LCD display unit includes: the LCD comprises an LCD interface J10, a triode Q7, a capacitor C38, a resistor R85, a resistor R22 and a resistor R120; the LCD interface J10 is used for externally connecting an LCD display screen; pin 1 of the LCD interface J10 is grounded, pin 2 of the LCD interface J10 is connected to a power supply 3.3V and one end of the capacitor C38, the other end of the capacitor C38 is grounded, pin 3 of the LCD interface J10 is connected to a power supply 3.3V, pin 35 of the LCD interface J10 is connected to pin 36 and then connected to one end of the resistor R85, the other end of the resistor R85 is connected to the power supply 3.3V, pin 37 of the LCD interface J10 is grounded, pin 33 of the LCD interface J10 is connected to pin 31 and then connected to the collector of the transistor Q7 and the connection point of pin 32 and pin 30 of the LCD interface J10, the base of the transistor Q7 is connected to one end of the resistor R120 and one end of the resistor R22, the other end of the resistor R120 is connected to the emitter of the transistor Q7 and then grounded, the other end of the resistor R22 is connected to the LCD display interface of the main control chip, and the pin 4 to the pin 24 of the LCD interface J10 are used for externally connecting an interface of an LCD display screen.
Further, the lithium battery power supply module includes: a lithium battery charging management chip U18, a lithium battery interface X3, an external power interface X4, a test point TP1, a test point TP2, a test point TP3, a Schottky diode TV6, a Schottky diode TV7, a capacitor C49, a capacitor C50, a capacitor C51, a capacitor C52, a capacitor C53, a capacitor C54, a capacitor C65, a capacitor C66, a capacitor C68, a capacitor C69, an inductor L5, a resistor R15, a resistor R19, a resistor R20, a resistor R23, a resistor R22, a resistor R24, a resistor R25, a resistor R26, a resistor R27, a resistor R28, a resistor R29, a resistor R30, a resistor R31, a resistor R32, a resistor R93 and a resistor R94; the lithium battery charging management chip U18 is of a model number BQ25895, and is a highly integrated 5A switch mode battery charging management and system power supply path management device suitable for lithium ion batteries and lithium polymer batteries; the external power interface X4 is a Micro-USB;
Compared with the prior art, the utility model has the advantages that the utility model provides a multifunctional digital clock system mainboard, including the humiture detecting element who links to each other with main control chip electrical property, real-time clock unit, chip memory cell, Flash memory cell, LCD display element, voice unit, GSM communication unit, lithium cell power supply unit, humiture detecting element is used for gathering the temperature and humidity data of environment, real-time clock unit is used for providing the clock for main control chip, LCD display element is used for showing the data that main control chip transmitted on the LCD display screen, voice unit is used for reporting the data that main control chip transmitted through the speaker with the voice mode, lithium cell power supply unit is used for providing the power for main control chip; the utility model discloses a be equipped with GSM communication unit and adopt GSM communication mode to realize remote communication, be equipped with independent chip memory cell and Flash memory cell with the storage data to solve the problem that can't carry out remote communication, can't the storage data that current multi-functional digital clock exists.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a block diagram of a system component of a multifunctional digital clock system motherboard according to an embodiment of the present invention.
Fig. 2 is a schematic circuit diagram of a GSM communication unit of a multifunctional digital clock system motherboard according to an embodiment of the present invention.
Fig. 3 is a schematic circuit diagram of a voice unit of a multifunctional digital clock system motherboard according to an embodiment of the present invention.
Fig. 4 is a schematic circuit diagram of a real-time clock unit of a multifunctional digital clock system motherboard according to an embodiment of the present invention.
Fig. 5 is a schematic diagram of a temperature and humidity detecting unit circuit of a multifunctional digital clock system motherboard provided by an embodiment of the present invention.
Fig. 6 is a schematic diagram of a chip memory cell circuit of a multifunctional digital clock system motherboard according to an embodiment of the present invention.
Fig. 7 is a schematic circuit diagram of a Flash storage unit of a multifunctional digital clock system motherboard according to an embodiment of the present invention.
Fig. 8 is a schematic diagram of an LCD display unit circuit of a multifunctional digital clock system main board according to an embodiment of the present invention.
Fig. 9 is a schematic circuit diagram of a lithium battery power supply module of a multifunctional digital clock system mainboard, provided by the embodiment of the present invention.
The labels in the above figures are: 1. a multifunctional digital clock system mainboard; 101. a main control chip; 102. a temperature and humidity detection unit; 103. a real-time clock unit; 104. a chip memory unit; 105. a Flash storage unit; 106. an LCD display unit; 107. a voice unit; 108. a GSM communication unit; 109. a lithium battery power supply unit; 2. a remote server.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The same or similar reference numerals in the drawings of the present embodiment correspond to the same or similar components; in the description of the present invention, it should be understood that if there are the terms "upper", "lower", "left", "right", etc. indicating the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, it is only for convenience of description and simplification of the description, but it is not intended to indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and therefore the terms describing the positional relationship in the drawings are only for illustrative purposes and are not to be construed as limitations of the present patent, and those skilled in the art can understand the specific meanings of the terms according to specific situations.
The technical solution of the present invention will be described in detail with reference to the accompanying drawings and specific embodiments.
As shown in fig. 1 to 9, the present invention provides a preferred embodiment.
Referring to fig. 1, the utility model provides a multifunctional digital clock system mainboard 1, including main control chip 101, and:
the temperature and humidity detection unit 102 is used for acquiring temperature and humidity data of an environment, and transmitting the temperature and humidity data to the main control chip 101 for processing and analysis;
the real-time clock unit 103, the real-time clock unit 103 is used for providing a clock for the main control chip 101 to realize the function related to time;
the chip storage unit 104, the chip storage unit 104 is used for storing the data transmitted by the main control chip 101 to the remote server, and the data transmitted by the remote server to the main control chip 101;
the Flash storage unit 105, the Flash storage unit 105 is used for storing the temperature and humidity data processed and analyzed by the main control chip 101;
the LCD display unit 106, the LCD display unit 106 is used for displaying the data transmitted by the main control chip 101 on the LCD display screen;
the voice unit 107, the voice unit 107 is used for broadcasting the data transmitted by the main control chip 101 through a loudspeaker in a voice mode;
the GSM communication unit 108, the GSM communication unit 108 is used for the data transmission between the main control chip 101 and the remote server 2 through the mobile network;
the lithium battery power supply unit 109, the lithium battery power supply unit 109 is used for providing power for the main control chip 101;
the main control chip 101 is electrically connected with the temperature and humidity detection unit 102, the real-time clock unit 103, the chip storage unit 104, the Flash storage unit 105, the LCD display unit 106, the voice unit 107, the GSM communication unit 108 and the lithium battery power supply unit 109 respectively; the master control chip 101 realizes network time correction through the remote server 2;
the main control chip 101 is an MCU, the model of the main control chip 101 is MSP430F47187, a high-precision AD sampling module and a calculation module are arranged in the main control chip 101, and a temperature and humidity compensation function is integrated, so that temperature and humidity data measurement data can be more accurate; the main control chip 101 is externally provided with a data acquisition interface, a clock interface, a storage interface, a Flash interface, an LCD display interface, a voice interface, a GSM interface, and a power interface for connecting with the temperature and humidity detection unit 102, the real-time clock unit 103, the chip storage unit 104, the Flash storage unit 105, the LCD display unit 106, the voice unit 107, the GSM communication unit 108, and the lithium battery power supply unit 109.
The working principle of the multifunctional digital clock system mainboard 1 is as follows:
the temperature and humidity detection unit 102 transmits the collected temperature and humidity data of the environment to the main control chip 101, the main control chip 101 transmits the processed and analyzed temperature and humidity data to the Flash storage unit 105 for storage, and the main control chip 101 transmits the processed and analyzed temperature and humidity data to the LCD display screen through the LCD display unit 106 for display on one hand and performs voice broadcast through the voice unit 107 through the loudspeaker on the other hand; the real-time clock unit 103 provides a clock for the main control chip 101 to implement time-related functions, such as log, perpetual calendar, timed uploading data, and the like; the main control chip 101 performs data transmission with the remote server 2 through the GSM communication unit 108, and after the main control chip 101 processes and analyzes the received data transmitted by the remote server 2, the processed and analyzed data, such as weather forecast (on the same day or three days in the future or one week in the future), the current day PM2.5 value of the city, the time of the world city, etc., are transmitted to the LCD display screen through the LCD display unit 106 for display, and voice broadcast is performed through the speaker through the voice unit 107.
The multifunctional digital clock system mainboard 1 provided by the technical scheme comprises a temperature and humidity detection unit 102, a real-time clock unit 103, a chip storage unit 104, a Flash storage unit 105, an LCD display unit 106, a voice unit 107, a GSM communication unit 108 and a lithium battery power supply unit 109, wherein the temperature and humidity detection unit 102 is electrically connected with a main control chip 101 and is used for collecting temperature and humidity data of the environment, the real-time clock unit 103 is used for providing a clock for the main control chip 101, the LCD display unit 106 is used for displaying the data transmitted by the main control chip 101 on an LCD display screen, the voice unit 107 is used for broadcasting the data transmitted by the main control chip 101 through a loudspeaker in a voice mode, and the lithium battery power supply unit 109 is used for providing a power supply for the main control chip 101; the utility model discloses a be equipped with GSM communication unit 108 and adopt GSM communication mode to realize remote communication, be equipped with independent chip memory cell 104 and Flash memory cell 105 with the storage data to the problem that can't carry out remote communication, can't the storage data that has solved current multi-functional digital clock existence.
As an embodiment of the present invention, referring to fig. 2, the GSM communication unit 108 includes: the 4G module U1A, the GPRS antenna interface X1, the SIM card connector U13, the inductor L1, the inductor L2, the schottky diode TV8, the schottky diode TV9, the schottky diode T10, the schottky diode T11, the capacitor C27, the capacitor C28, the capacitor C29, the capacitor C30, the resistor R1, the resistor R12, the resistor R11, the resistor R73, the resistor R74, and the resistor R75; the model of the 4G module U1A is EC600S-CN, compatible with 2G GSM communication system; the SIM card connector U13 is used for inserting a SIM card so that the 4G module U1A transmits and receives data through the SIM card connected with a mobile network, and the model of the SIM card connector U13 is MUP-C783; the GPRS antenna interface X1 is used for connecting a GPRS antenna to realize wireless communication;
pin 1 of SIM card connector U13 is connected to the negative electrode of schottky diode TV8 and one end of capacitor C27, respectively, the connection point of the negative electrode of schottky diode TV8 and one end of capacitor C27 is connected to one end of resistor R11 and then to pin 8 of 4G module U1A, pin 5 of SIM card connector U13 is connected to the other end of capacitor C27 and then to ground, pin 2 of SIM card connector U13 is connected to one end of capacitor C28, the negative electrode of schottky diode TV9 and one end of resistor R73 in sequence, the other end of resistor R73 is connected to pin 7 of 4G module U1A, pin 7 of SIM card connector U13 is connected to one end of capacitor C29, one end of schottky diode TV10, the other end of resistor R11 and one end of resistor R74 in sequence, the other end of resistor R74 is connected to pin 6 of 4G module U1A, pin 3 of SIM card connector U13 is connected to one end of capacitor C30, the negative electrode of schottky diode TV11 and one end of resistor R75 in sequence, the other end of the resistor R75 is connected with a pin 5 of the 4G module U1A, the anode of the Schottky diode TV8, the anode of the Schottky diode TV11, the anode of the Schottky diode TV10 and the anode of the Schottky diode TV9 are connected and then grounded, the other end of the capacitor C28, the other end of the capacitor C29 and the other end of the capacitor C30 are connected and then grounded, the pin 18, the pin 30, the pin 35, the pin 38, the pin 47 and the pin 73 of the 4G module U1A are grounded respectively, the pin 43, the pin 44 and the pin 45 of the 4G module U1A are connected and then grounded, the pin 74 of the 4G module U1A is connected with one end of the resistor R12, the other end of the resistor R12 is grounded, the pin 46 of the 4G module U1A is connected with one end of the resistor R1 and one end of the inductor L1 respectively, the other end of the resistor R1 is connected with one end of the inductor L2 and then connected with a pin 1 of the GPRS antenna interface X2, the pin 56, the antenna interface X6953, the pin 826953, the pin 4G interface X2 and the GPRS interface X9, The pins 5 are grounded after being connected; pin 31 and pin 32 of the 4G module U1A are connected to the GSM interface of the main control chip 101.
As an embodiment of the present invention, referring to fig. 3, the speech unit 107 includes: the voice chip U2A, the speaker LS, a capacitor C1, a capacitor C2, a capacitor C3, a capacitor C4, a capacitor C6, a capacitor C8, a resistor R7, a resistor R8, a resistor R1, a resistor R2, a resistor R3 and a resistor R4; the model of the voice chip U2A is ISD 1420; pin 26 of the voice chip U2A is grounded, pin 16 and pin 28 of the voice chip U2A are connected to the power supply voltage VCC, pin 13 and pin 12 of the voice chip U2A are connected to the negative electrode of the speaker LS, pin 20 of the voice chip U2A is connected to one end of the capacitor C2 and the other end of the capacitor C2 is connected to the power supply voltage VCC, pin 14 of the voice chip U2A is connected to the positive electrode of the speaker LS, pin 15 of the voice chip U2A is connected to the negative electrode of the speaker LS, pin 20 of the voice chip U2A is connected to one end of the capacitor C3, pin 21 of the voice chip U2A is connected to one end of a resistor R1, the other end of a capacitor C3 is connected to the other end of a resistor R1, pin 24 of the voice chip U2A is connected to one end of a capacitor C4, pin 17 of the voice chip U2A is connected to one end of a capacitor C8, the other ends of a resistor R4 and the other end of a capacitor C8 are connected to the other end of a resistor 4, and the other end of a resistor 4 is connected to the ground, the other end of the capacitor C1 and the other end of the resistor R3 are connected and then connected with a power supply voltage VCC, a pin 19 of the voice chip U2A is respectively connected with one end of the resistor R2 and one end of the capacitor C6, the other end of the resistor R2 and the other end of the capacitor C6 are connected and then grounded, a pin 23 of the voice chip U2A is connected with one end of the resistor R8 and then connected with a voice interface of the main control chip 101, a pin 24 of the voice chip U2A is connected with one end of the resistor R7 and then connected with the voice interface of the main control chip 101, and the other end of the resistor R7 and the other end of the resistor R8 are connected and then connected with the power supply voltage VCC.
As an embodiment of the present invention, referring to fig. 4, the real-time clock unit 103 includes: the circuit comprises a clock chip U1, a crystal oscillator X1, a MOS transistor Q1, a super capacitor CE1, a capacitor C1, a capacitor C2, a resistor R1, a resistor R3, a resistor R4 and a resistor R5; the model of the clock chip U1 is DS 1337; pin 1 of a clock chip U1 is connected with one end of a crystal oscillator X1, pin 2 of a clock chip U1 is connected with the other end of a crystal oscillator X1, pin 3 of the clock chip U1 is sequentially connected with one end of a capacitor C1, the anode of a super capacitor CE1, one end of a resistor R1 and the S pole of a MOS tube Q1, the anode of the super capacitor CE1 is further connected with a base power supply voltage VBB, pin 4 of the clock chip U1 is connected with the other end of a capacitor C1 and the cathode of a super capacitor CE1 and then grounded, the other end of the resistor R1 is connected with the G pole of the MOS tube Q1 and then connected with an enable end EN, the D pole of the MOS tube Q1 is connected with a circuit voltage 3.3V, pin 8 of the clock chip U1 is sequentially connected with the circuit voltage 3.3V, one end of the capacitor C2, one end of the resistor R3, one end of the resistor R4 and one end of the resistor R5475, the other end of the capacitor C2 is grounded, the pin 6857 of the clock chip U2 is connected with the master control chip U2 and the other end of the pin 2 is connected with the clock chip 2, the pin 5 of the clock chip U1 is connected to the other end of the resistor R5 and then connected to the clock interface of the main control chip 101.
As an embodiment of the present invention, referring to fig. 5, the temperature and humidity detecting unit 102 includes: a temperature and humidity sensor interface J14, a resistor R110 and a resistor R111; the temperature and humidity sensor interface J14 is used for connecting an external temperature and humidity sensor to obtain a sampling signal of the external temperature and humidity sensor, and transmitting the collected sampling signal of the external temperature and humidity sensor to the main control chip 101; pin 4 of the temperature and humidity sensor interface J14 is grounded, pin 3 of the temperature and humidity sensor interface J14 is connected with one end of the resistor R111 and the data acquisition interface of the main control chip 101, pin 2 of the temperature and humidity sensor interface J14 is connected with one end of the resistor R110 and the data acquisition interface of the main control chip 101, and the other end of the resistor R111 and the other end of the resistor R110 are connected and then connected with pin 1 and the terminal of the temperature and humidity sensor interface J14; and the pin 1, the pin 2, the pin 3 and the pin 4 of the temperature and humidity sensor interface J14 are also connected with an external temperature and humidity sensor. The temperature and humidity sensor interface J14 is a standard general interface.
As an embodiment of the present invention, referring to fig. 6, the chip storage unit 104 includes: a large-capacity memory chip U11, a capacitor C35 and a resistor R144; the mass storage chip U11 model is 24LC1025 SN; pin 1 and pin 2 of the large-capacity memory chip U11 are connected and then grounded, pin 3 of the large-capacity memory chip U11 is connected with a power supply 3.3V, pin 4 of the large-capacity memory chip U11 is grounded, pin 5 of the large-capacity memory chip U11 is connected with a storage interface of the main control chip 101, pin 6 of the large-capacity memory chip U11 is connected with the storage interface of the main control chip 101, pin 7 of the large-capacity memory chip U11 is connected with one end of a resistor R144, the other end of the resistor R144 is connected with the power supply 3.3V, pin 8 of the large-capacity memory chip U11 is respectively connected with the power supply 3.3V and one end of a capacitor C35, and the other end of the capacitor C35 is grounded;
as an embodiment of the present invention, referring to fig. 7, Flash storage unit 105 includes: a serial flash memory U14, a resistor R106, a resistor R107, and a resistor R143; the model of the serial flash memory U14 is MX25L 1605E; pin 1 of the serial Flash memory U14 is connected with one end of the resistor R107, pin 8 of the serial Flash memory U14 is connected with the other end of the resistor R107, the power supply 3.3V and one end of the resistor R106 respectively, pin 7 of the serial Flash memory U14 is connected with the other end of the resistor R106, pin 4 of the serial Flash memory U14 is grounded, pin 5 of the serial Flash memory U14 is connected with the Flash interface of the main control chip 101, pin 6 of the serial Flash memory U14 is connected with the Flash interface of the main control chip 101, pin 2 of the serial Flash memory U14 is connected with the Flash interface of the main control chip 101, pin 3 of the serial Flash memory U14 is connected with one end of the resistor R143, and the other end of the resistor R143 is grounded.
As an embodiment of the present invention, referring to fig. 8, the LCD display unit 106 includes: the LCD comprises an LCD interface J10, a triode Q7, a capacitor C38, a resistor R85, a resistor R22 and a resistor R120; the LCD interface J10 is used for externally connecting an LCD display screen; pin 1 of LCD interface J10 is grounded, pin 2 of LCD interface J10 is connected to one end of power supply 3.3V and capacitor C38, the other end of capacitor C38 is grounded, pin 3 of LCD interface J10 is connected to power supply 3.3V, pin 35 of LCD interface J10 is connected to pin 36 and then is connected to one end of resistor R85, the other end of resistor R85 is connected to power supply 3.3V, pin 37 of LCD interface J10 is grounded, pin 33 of LCD interface J10 is connected to pin 31 and then is connected to the collector of transistor Q7 and the connection point of pin 32 and pin 30 of LCD interface J10, the base of transistor Q7 is connected to one end of resistor R120 and one end of resistor R22, the other end of resistor R120 is connected to the emitter of transistor Q7 and then is grounded, the other end of resistor R22 is connected to the LCD display interface of main control chip 101, and pin 4-pin 10 is connected to pin 24 of LCD display screen.
As an embodiment of the utility model, referring to fig. 9, the lithium battery power supply module includes: a lithium battery charging management chip U18, a lithium battery interface X3, an external power interface X4, a test point TP1, a test point TP2, a test point TP3, a Schottky diode TV6, a Schottky diode TV7, a capacitor C49, a capacitor C50, a capacitor C51, a capacitor C52, a capacitor C53, a capacitor C54, a capacitor C65, a capacitor C66, a capacitor C68, a capacitor C69, an inductor L5, a resistor R15, a resistor R19, a resistor R20, a resistor R23, a resistor R22, a resistor R24, a resistor R25, a resistor R26, a resistor R27, a resistor R28, a resistor R29, a resistor R30, a resistor R31, a resistor R32, a resistor R93 and a resistor R94; the lithium battery charging management chip U18 is a model BQ25895, and is a highly integrated 5A switch mode battery charging management and system power supply path management device suitable for lithium ion batteries and lithium polymer batteries; the external power interface X4 is a Micro-USB;
pin 1 of the lithium battery charging management chip U18 is connected to one end of a capacitor C68, one end of a capacitor C69, a test point TP1 and pin 1 of an external power interface X1 in sequence, the other end of a capacitor C68 is connected to the other end of the capacitor C69 and then connected to an analog ground, pin 2 of the external power interface X1 is connected to the negative electrode of a schottky diode TV7, pin 3 of the external power interface X1 is connected to the negative electrode of a schottky diode TV6, the positive electrode of the schottky diode TV6 is connected to the positive electrode of a schottky diode TV7 and then connected to the ground, pin 5 of the external power interface X1 is connected to the analog ground, pin 2 of the lithium battery charging management chip U18 is connected to one end of a resistor R15, pin 3 of the lithium battery charging management chip U18 is connected to the other end of a resistor R15, pin 4 of the lithium battery charging management chip U18 is connected to one end of a resistor R29, pin 5 of the lithium battery charging management chip U18 is connected to one end of a resistor R28 and a resistor R25, the other end of the resistor R25 is connected with one end of the resistor R22 and one end of the resistor R24 respectively, the other end of the resistor R22 is grounded, the other end of the resistor R24 is connected with a power interface of the main control chip 101, a pin 6 of the lithium battery charging management chip U18 is connected with one end of the resistor R27 and one end of the resistor R19 respectively, the other end of the resistor R19 is connected with one end of the resistor R23, the other end of the resistor R23 is connected with the power interface of the main control chip 101, the other end of the resistor R29, the other end of the resistor R28 and the other end of the resistor R27 are connected and then connected with 2.8V, a pin 8 of the lithium battery charging management chip U18 is connected with one end of the resistor R30, the other end of the resistor R30 is grounded, a pin 9 of the lithium battery charging management chip U18 is connected with one end of the resistor R31, the other end of the resistor R31 is grounded, a pin 10 of the lithium battery charging management chip U18 is connected with one end of the resistor R32, a pin 11 of the lithium battery charging management chip U18 is connected with one end of the resistor R26 and the resistor R20 respectively, the other end of the resistor R26 is connected with the other end of the resistor R32 and then grounded, the other end of the resistor R20 is connected with a pin 22 of a lithium battery charging management chip U18, a pin 13 and a pin 14 of the lithium battery charging management chip U18 are connected and then respectively connected with one end of a capacitor C53 and one end of a capacitor C54, the other end of the capacitor C53 is connected with the other end of the capacitor C54 and then connected with an analog ground, one end of the capacitor C54 is also connected with a test point TP3 and a pin 2 of a lithium battery interface X3, a pin 1 of a lithium battery interface X3 is connected with the analog ground, a pin 15 and a pin 16 of the lithium battery charging management chip U18 are connected and then respectively connected with one end of an inductor L5 and one end of a capacitor C65, a pin 17 and a pin 18 of the lithium battery charging management chip U18 are connected and then connected with the analog ground, a pin 19 and a pin 20 of the lithium battery charging management chip U18 are connected and then respectively connected with the other end of an inductor L5 and one end of a capacitor C51, and the other end of an inductor L5 is also connected with one end of a capacitor C51, one end of a capacitor C65 is further connected to one end of a capacitor C66, the other end of the capacitor C65 is connected to the other end of the capacitor C66 and then grounded, one end of a capacitor C66 is further connected to a test point TP2, a pin 21 of a lithium battery charging management chip U18 is connected to one end of a resistor R94, the other end of the resistor R94 is connected to the other end of the capacitor C51, the pin 21 of the lithium battery charging management chip U18 is further connected to one end of a capacitor C50, the other end of the capacitor C50 is grounded, a pin 23 of the lithium battery charging management chip U18 is respectively connected to one end of a capacitor C52 and one end of a capacitor C49, the other end of the capacitor C52 is connected to the other end of a capacitor C49 and then connected to an analog ground, a pin 24 of the lithium battery charging management chip U18 is connected to one end of a resistor R93, and the other end of the resistor R93 is connected to a power interface of the main control chip 101.
The embodiments of the present invention have been described in detail, but the invention is not limited to the embodiments, and those skilled in the art can make many equivalent modifications or substitutions without departing from the spirit of the present invention, and the equivalent modifications or substitutions are included in the scope of protection defined by the claims of the present application.
Claims (9)
1. A multifunctional digital clock system mainboard is characterized by comprising a main control chip and:
the temperature and humidity detection unit is used for acquiring temperature and humidity data of an environment and transmitting the temperature and humidity data to the main control chip for processing and analysis;
the real-time clock unit is used for providing a clock for the main control chip;
the chip storage unit is used for storing the data transmitted to the remote server by the main control chip and the data transmitted to the main control chip by the remote server;
the Flash storage unit is used for storing the temperature and humidity data processed and analyzed by the main control chip;
the LCD display unit is used for displaying the data transmitted by the main control chip on an LCD display screen;
the voice unit is used for broadcasting the data transmitted by the main control chip through a loudspeaker in a voice mode;
the GSM communication unit is used for data transmission between the main control chip and a remote server through a mobile network;
the lithium battery power supply unit is used for providing power for the main control chip;
the main control chip is electrically connected with the temperature and humidity detection unit, the real-time clock unit, the chip storage unit, the Flash storage unit, the LCD display unit, the voice unit, the GSM communication unit and the lithium battery power supply unit respectively; the master control chip realizes network proofreading time through a remote server;
the main control chip is an MCU (micro controller unit), the model of the main control chip is MSP430F47187, a high-precision AD sampling module and a calculation module are arranged in the main control chip, and a temperature and humidity compensation function is integrated, so that temperature and humidity data measurement data can be more accurate; the external portion of the main control chip is provided with a data acquisition interface, a clock interface, a storage interface, a Flash interface, an LCD display interface, a voice interface, a GSM interface and a power interface so as to be connected with the temperature and humidity detection unit, the real-time clock unit, the chip storage unit, the Flash storage unit, the LCD display unit, the voice unit, the GSM communication unit and the lithium battery power supply unit.
2. The digital clock system motherboard of claim 1, wherein said GSM communication unit comprises: the 4G module U1A, the GPRS antenna interface X1, the SIM card connector U13, the inductor L1, the inductor L2, the schottky diode TV8, the schottky diode TV9, the schottky diode T10, the schottky diode T11, the capacitor C27, the capacitor C28, the capacitor C29, the capacitor C30, the resistor R1, the resistor R12, the resistor R11, the resistor R73, the resistor R74, and the resistor R75; the model of the 4G module U1A is EC600S-CN, and is compatible with a 2G GSM communication system; the SIM card connector U13 is used for inserting a SIM card so that the 4G module U1A transmits and receives data through a SIM card connecting mobile network, and the model of the SIM card connector U13 is MUP-C783; the GPRS antenna interface X1 is used for connecting a GPRS antenna to realize wireless communication;
pin 1 of the SIM card connector U13 is connected to the negative electrode of the schottky diode TV8 and one end of the capacitor C27, respectively, the connection point of the negative electrode of the schottky diode TV8 and one end of the capacitor C27 is connected to one end of the resistor R11 and then connected to pin 8 of the 4G module U1A, pin 5 of the SIM card connector U13 is connected to the other end of the capacitor C27 and then grounded, pin 2 of the SIM card connector U13 is connected in sequence to one end of the capacitor C28, the negative electrode of the schottky diode TV9 and one end of the resistor R73, the other end of the resistor R73 is connected to pin 7 of the 4G module U1A, pin 7 of the SIM card connector U13 is connected in sequence to one end of the capacitor C29, one end of the schottky diode TV10, the other end of the resistor R11 and one end of the resistor R74, and the other end of the resistor R74 is connected to pin 6 of the U1A of the 4G module U A, a pin 3 of the SIM card connector U13 is sequentially connected to one end of the capacitor C30, a cathode of the schottky diode TV11, and one end of the resistor R75, the other end of the resistor R75 is connected to a pin 5 of the 4G module U1A, an anode of the schottky diode TV8, an anode of the schottky diode TV11, an anode of the schottky diode TV10, and an anode of the schottky diode TV9 are connected and then grounded, the other end of the capacitor C28, the other end of the capacitor C29, and the other end of the capacitor C30 are connected and then grounded, a pin 18, a pin 30, a pin 35, a pin 38, a pin 47, and a pin 73 of the 4G module U1 638 are respectively grounded, a pin 43, a pin 44, and a pin 45 of the 4G module U1 7378 are connected and then grounded, a pin 74 of the 4G module U1A is connected to one end of the resistor R12, and the other end of the resistor R12 is grounded, a pin 46 of the 4G module U1A is connected to one end of the resistor R1 and one end of the inductor L1, respectively, the other end of the resistor R1 is connected to one end of the inductor L2 and then connected to a pin 1 of the GPRS antenna interface X1, and a pin 2, a pin 3, a pin 4, and a pin 5 of the GPRS antenna interface X1 are connected and then grounded; and the pin 31 and the pin 32 of the 4G module U1A are connected with the GSM interface of the main control chip.
3. The digital clock system motherboard of claim 1, wherein said voice unit comprises: the voice chip U2A, the speaker LS, a capacitor C1, a capacitor C2, a capacitor C3, a capacitor C4, a capacitor C6, a capacitor C8, a resistor R7, a resistor R8, a resistor R1, a resistor R2, a resistor R3 and a resistor R4; the model of the voice chip U2A is ISD 1420; pin 26 ground connection of pronunciation chip U2A, connect power supply voltage VCC after the pin 16 and the pin 28 of pronunciation chip U2A link to each other, connect after the pin 13 and the pin 12 of pronunciation chip U2A link to each other ground connection behind the one end of electric capacity C2, another termination power supply voltage VCC of electric capacity C2, the pin 14 of pronunciation chip U2A is connected the positive pole of speaker LS, the pin 15 of pronunciation chip U2A is connected the negative pole of speaker LS, the pin 20 of pronunciation chip U2A is connected the one end of electric capacity C3, the pin 21 of pronunciation chip U2A is connected the one end of resistance R1, the other end of electric capacity C3 is connected the other end of resistance R1, the pin 24 of pronunciation chip U2A is connected the one end of electric capacity C4, the pin 17 of pronunciation chip U2A is connected the one end of electric capacity C8, the other end of electric capacity C4 is connected respectively the one end of resistance R3 and the other end C8 of electric capacity C8, the other end of electric capacity C8 still connects resistance R4's the other end, connect behind resistance R4's the other end ground connection electric capacity C1's one end, electric capacity C1's the other end with connect power supply voltage VCC after resistance R3's the other end links to each other, pronunciation chip U2A's pin 19 is connected respectively resistance R2's one end with electric capacity C6's one end, resistance R2's the other end with electric capacity C6's the other end links to each other the back ground connection, pronunciation chip U2A's pin 23 is connected connect behind resistance R8's one end connect the voice interface of main control chip, pronunciation chip U2A's pin 24 is connected connect behind resistance R7's one end connect the voice interface of main control chip, resistance R7's the other end with connect power supply voltage VCC after resistance R8's the other end links to each other end.
4. The digital clock system motherboard of claim 1, wherein said real time clock unit comprises: the circuit comprises a clock chip U1, a crystal oscillator X1, a MOS transistor Q1, a super capacitor CE1, a capacitor C1, a capacitor C2, a resistor R1, a resistor R3, a resistor R4 and a resistor R5; the model of the clock chip U1 is DS 1337; pin 1 of the clock chip U1 is connected to one end of the crystal oscillator X1, pin 2 of the clock chip U1 is connected to the other end of the crystal oscillator X1, pin 3 of the clock chip U1 is sequentially connected to one end of the capacitor C1, the anode of the super capacitor CE1, one end of the resistor R1, and the S-pole of the MOS transistor Q1, the anode of the super capacitor CE1 is further connected to the base power voltage VBB, pin 4 of the clock chip U1 is connected to the other end of the capacitor C1 and the cathode of the super capacitor CE1 and then grounded, the other end of the resistor R1 is connected to the G-pole of the MOS transistor Q1 and then connected to the enable end EN, the D-pole of the MOS transistor Q1 is connected to the circuit voltage 3.3V, pin 8 of the clock chip U1 is sequentially connected to the circuit voltage 3.3V, one end of the capacitor C2, one end of the resistor R3, one end of the resistor R4 and one end of the resistor R5, the other end of the capacitor C2 is grounded, a pin 7 of the clock chip U1 is connected with the other end of the resistor R3, a pin 6 of the clock chip U1 is connected with the other end of the resistor R4 and then connected with a clock interface of the main control chip, and a pin 5 of the clock chip U1 is connected with the other end of the resistor R5 and then connected with the clock interface of the main control chip.
5. The multifunctional digital clock system mainboard of claim 1, wherein the temperature and humidity detection unit comprises: a temperature and humidity sensor interface J14, a resistor R110 and a resistor R111; the temperature and humidity sensor interface J14 is used for connecting an external temperature and humidity sensor to obtain a sampling signal of the external temperature and humidity sensor, and transmitting the collected sampling signal of the external temperature and humidity sensor to the main control chip; a pin 4 of the temperature and humidity sensor interface J14 is grounded, a pin 3 of the temperature and humidity sensor interface J14 is connected to one end of the resistor R111 and the data acquisition interface of the main control chip respectively, a pin 2 of the temperature and humidity sensor interface J14 is connected to one end of the resistor R110 and the data acquisition interface of the main control chip respectively, and the other end of the resistor R111 and the other end of the resistor R110 are connected and then connected to a pin 1 and a terminal of the temperature and humidity sensor interface J14 respectively; and the pin 1, the pin 2, the pin 3 and the pin 4 of the temperature and humidity sensor interface J14 are also connected with an external temperature and humidity sensor.
6. The digital clock system motherboard of claim 1, wherein said chip memory unit comprises: a large-capacity memory chip U11, a capacitor C35 and a resistor R144; the model number of the mass storage chip U11 is 24LC1025 SN; pin 1 and the back ground connection that pin 2 of mass storage chip U11 link to each other, 3.3V of power are connected to mass storage chip U11's pin 3, 4 ground connections of mass storage chip U11's pin, 5 connections of mass storage chip U11's storage interface of main control chip, 6 connections of mass storage chip U11's pin the storage interface of main control chip, 7 connections of mass storage chip U11's pin the one end of resistance R144, the other termination power 3.3V of resistance R144, mass storage chip U11's pin 8 connect respectively power 3.3V with the one end of electric capacity C35, the other end ground connection of electric capacity C35.
7. The digital clock system motherboard of claim 1, wherein said Flash storage unit comprises: a serial flash memory U14, a resistor R106, a resistor R107, and a resistor R143; the model of the serial flash memory U14 is MX25L 1605E; pin 1 of serial Flash memory U14 connects the one end of resistance R107, pin 8 of serial Flash memory U14 connects respectively resistance R107's the other end, power 3.3V and resistance R106's one end, pin 7 of serial Flash memory U14 connects resistance R106's the other end, pin 4 ground connection of serial Flash memory U14, pin 5 of serial Flash memory U14 connects the Flash interface of main control chip, pin 6 of serial Flash memory U14 connects the Flash interface of main control chip, pin 2 of serial Flash memory U14 connects the Flash interface of main control chip, pin 3 of serial Flash memory U14 connects the one end of resistance R143, resistance R143's other end ground connection.
8. The digital clock system motherboard of claim 2, wherein said LCD display unit comprises: the LCD comprises an LCD interface J10, a triode Q7, a capacitor C38, a resistor R85, a resistor R22 and a resistor R120; the LCD interface J10 is used for externally connecting an LCD display screen; pin 1 of the LCD interface J10 is grounded, pin 2 of the LCD interface J10 is connected to a power supply 3.3V and one end of the capacitor C38, the other end of the capacitor C38 is grounded, pin 3 of the LCD interface J10 is connected to a power supply 3.3V, pin 35 of the LCD interface J10 is connected to pin 36 and then connected to one end of the resistor R85, the other end of the resistor R85 is connected to the power supply 3.3V, pin 37 of the LCD interface J10 is grounded, pin 33 of the LCD interface J10 is connected to pin 31 and then connected to the collector of the transistor Q7 and the connection point of pin 32 and pin 30 of the LCD interface J10, the base of the transistor Q7 is connected to one end of the resistor R120 and one end of the resistor R22, the other end of the resistor R120 is connected to the emitter of the transistor Q7 and then grounded, the other end of the resistor R22 is connected to the LCD display interface of the main control chip, and the pin 4 to the pin 24 of the LCD interface J10 are used for externally connecting an interface of an LCD display screen.
9. The multifunctional digital clock system motherboard of claim 1 wherein said lithium battery power module comprises: a lithium battery charging management chip U18, a lithium battery interface X3, an external power interface X4, a test point TP1, a test point TP2, a test point TP3, a Schottky diode TV6, a Schottky diode TV7, a capacitor C49, a capacitor C50, a capacitor C51, a capacitor C52, a capacitor C53, a capacitor C54, a capacitor C65, a capacitor C66, a capacitor C68, a capacitor C69, an inductor L5, a resistor R15, a resistor R19, a resistor R20, a resistor R23, a resistor R22, a resistor R24, a resistor R25, a resistor R26, a resistor R27, a resistor R28, a resistor R29, a resistor R30, a resistor R31, a resistor R32, a resistor R93 and a resistor R94; the lithium battery charging management chip U18 is of a model number BQ25895, and is a highly integrated 5A switch mode battery charging management and system power supply path management device suitable for lithium ion batteries and lithium polymer batteries; the external power interface X4 is a Micro-USB;
pin 1 of the lithium battery charging management chip U18 is sequentially connected to one end of the capacitor C68, one end of the capacitor C69, the test point TP1, and pin 1 of the external power interface X1, the other end of the capacitor C68 is connected to the other end of the capacitor C69 and then connected to an analog ground, pin 2 of the external power interface X1 is connected to the negative electrode of the schottky diode TV7, pin 3 of the external power interface X1 is connected to the negative electrode of the schottky diode TV6, the positive electrode of the schottky diode TV6 is connected to the positive electrode of the schottky diode TV7 and then connected to the ground, pin 5 of the external power interface X1 is connected to the analog ground, pin 2 of the lithium battery charging management chip U18 is connected to one end of the resistor R15, pin 3 of the lithium battery charging management chip U18 is connected to the other end of the resistor R15, pin 824 of the lithium battery charging management chip U18 is connected to one end of the resistor R29, pin 5 of lithium battery charging management chip U18 connects respectively resistance R28's one end with resistance R25's one end, resistance R25's the other end is connected respectively resistance R22's one end with resistance R24's one end, resistance R22's other end ground connection, resistance R24's the other end is connected the power source interface of main control chip, lithium battery charging management chip U18's pin 6 is connected respectively resistance R27's one end with resistance R19's one end, resistance R19's the other end is connected the one end of resistance R23, resistance R23's the other end is connected the power source interface of main control chip, resistance R29's the other end, resistance R28's the other end and resistance R27's the other end connect 2.8V after connecting, lithium battery charging management chip U18's pin 8 connects resistance R30's one end, resistance R30's the other end ground connection, pin 9 of the lithium battery charging management chip U18 is connected to one end of the resistor R31, the other end of the resistor R31 is grounded, pin 10 of the lithium battery charging management chip U18 is connected to one end of the resistor R32, pin 11 of the lithium battery charging management chip U18 is connected to one end of the resistor R26 and one end of the resistor R20 respectively, the other end of the resistor R26 is connected to the other end of the resistor R32 and then grounded, the other end of the resistor R20 is connected to pin 22 of the lithium battery charging management chip U18, pin 13 and pin 14 of the lithium battery charging management chip U18 are connected to one end of the capacitor C53 and one end of the capacitor C54 respectively, the other end of the capacitor C53 and the other end of the capacitor C54 are connected to an analog ground, one end of the capacitor C54 is connected to the test point 3 and pin 2 of the lithium battery interface X3 respectively, pin 1 of a lithium battery interface X3 is connected to a simulation ground, pin 15 and pin 16 of a lithium battery charging management chip U18 are connected to each other and then connected to one end of the inductor L5 and one end of the capacitor C65, pin 17 and pin 18 of the lithium battery charging management chip U18 are connected to each other and then connected to a simulation ground, pin 19 and pin 20 of the lithium battery charging management chip U18 are connected to each other and then connected to the other end of the inductor L5 and one end of the capacitor C51, the other end of the inductor L5 is further connected to one end of the capacitor C51, one end of the capacitor C65 is further connected to one end of the capacitor C66, the other end of the capacitor C65 and the other end of the capacitor C66 are connected to each other and then connected to the ground, one end of the capacitor C66 is further connected to the test point TP2, pin 21 of the lithium battery charging management chip U18 is connected to one end of the resistor R94, and the other end of the resistor R94 is connected to the other end of the capacitor C51, pin 21 of lithium battery charging management chip U18 still connects the one end of electric capacity C50, electric capacity C50's other end ground connection, lithium battery charging management chip U18's pin 23 is connected respectively electric capacity C52's one end with electric capacity C49's one end, electric capacity C52's the other end with electric capacity C49's the other end connects the analog ground after linking to each other, lithium battery charging management chip U18's pin 24 connects resistance R93's one end, resistance R93's the other end is connected main control chip's power source.
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