CN211237451U

CN211237451U - Teaching circuit bottom plate based on ELVIS

Info

Publication number: CN211237451U
Application number: CN201922024917.6U
Authority: CN
Inventors: 于效宇; 刘艳; 谈海平
Original assignee: University of Electronic Science and Technology of China Zhongshan Institute
Current assignee: University of Electronic Science and Technology of China Zhongshan Institute
Priority date: 2019-11-21
Filing date: 2019-11-21
Publication date: 2020-08-11
Anticipated expiration: 2029-11-21

Abstract

The utility model discloses a teaching circuit bottom plate based on ELVIS, which comprises a main control module, a bus switching module, a storage module, a power supply module and an interface module; the main control module is respectively and electrically connected with the bus switching module, the storage module and the interface module, and the power supply module provides working power supply for each module; bus switching module is used for directly upgrading serial devices to the USB bus, and convenient transmission data promotes the scalability of bottom plate through setting up interface module, makes things convenient for the student to build the circuit and does the experiment, makes the bottom plate have certain memory capacity through setting up storage module, and the experimental data of doing on the teaching bottom plate of convenient record has simplified the structure under the prerequisite of guaranteeing the bottom plate function, effectively reduction in production cost, and the practicality is high, is fit for using widely on a large scale.

Description

Teaching circuit bottom plate based on ELVIS

Technical Field

The utility model relates to a teaching circuit board, especially a teaching circuit bottom plate based on ELVIS.

Background

At present, a plurality of colleges and universities in China have opened circuit principle courses, and the circuit principle courses are important professional basic courses and mainly explain measuring and analyzing methods of electric physical quantities. As the course of the circuit principle has rich practice, an important teaching link of the method is measurement experiments of various electrical and physical quantities in the course.

The National Instruments instrumentation virtual instrument Suite (ELVIS for short) teaching experiment is a set of LabVIEW-based virtual instrument Suite designed and developed by NI corporation in 2004. The ELVIS design mainly aims at teaching, is a comprehensive teaching tool and can be used for teaching courses such as circuit design, instrument control, wireless communication and the like. A student can design a circuit needing an experiment on an ELVIS circuit development board in Multisim and then further design a real circuit board, the wiring of the circuit and the circuit is completely the same, the circuit design and the experiment test can be completed on an EIVIS platform, and the student can observe a simulation result and real experimental data on a visual panel; however, the existing colleges and universities adopt prototype experiment boards carried on an ELVIS platform for experiment teaching, and the prototype experiment boards are expensive, small in area, not suitable for large-scale circuit experiments and suitable for large-scale popularization and use in the colleges and universities.

Disclosure of Invention

In order to overcome the not enough of prior art, the utility model provides a low in production cost's teaching circuit bottom plate based on ELVIS.

The utility model provides a technical scheme that its technical problem adopted is:

an ELVIS-based teaching circuit bottom board comprises a main control module, a bus switching module, a storage module, a power supply module and an interface module; the main control module is respectively and electrically connected with the bus switching module, the storage module and the interface module, and the power supply module provides working power supply for each module.

The main control module comprises a main controller U3, a light emitting diode D4, a light emitting diode D5, a light emitting diode D6, a light emitting diode D7 and a capacitor C10; the type of the master controller U3 is IAP15W4K58S4, a pin 17 of the master controller U3 is connected with the anode of the light-emitting diode D5, and the cathode of the light-emitting diode D5 is grounded through a resistor R23; the 16 pins of the master controller U3 are connected with the anode of the light emitting diode D4, and the cathode of the light emitting diode D4 is connected with the node between the cathode of the light emitting diode D5 and the ground through a resistor R22; one end of the capacitor is connected with a VCC power supply, and the other end of the capacitor is connected with a node between the cathode of the light emitting diode D5 and the ground; the anode of the light emitting diode D6 is connected with a VCC power supply, and the cathode is connected with 2 pins of the master controller U3 through a resistor R28; the anode of the light emitting diode D7 is connected with the node of the anode of the light emitting diode D6 and a VCC power supply, and the cathode is connected with the 3 pins of the master controller U3 through a resistor R29.

The bus adapter module comprises a bus adapter chip U1, a plug-in connector P4, a plug-in connector P7, a crystal oscillator Y1, a diode D1, a light emitting diode D2, a light emitting diode D3, a resistor R2, a resistor R3, a resistor R4, a resistor R5, a capacitor C1, a capacitor C2, a capacitor C3, a capacitor C8 and a capacitor C9; pin 1 of the plug connector P4 is grounded, pin 2 of the plug connector P4 is connected with pin 5 of the bus adapter chip U1, pin 3 of the plug connector P4 is connected with pin 4 of the bus adapter chip U1, pin 4 of the plug connector P4 is divided into two paths, one path is connected with pin 1 of the plug connector P7, and the other path is connected with pin 4 of the plug connector P7;

pins

2, 3, 5 and 6 of the plug-in connector P7 are connected with a VCC power supply; the 6 pins of the master U3 are grounded through C3; one end of the crystal oscillator Y1 is divided into two paths, one path is connected with a node between the capacitor C3 and the ground through the capacitor C8, and the other path is connected with a 2 pin of the master controller U3; the other end of the crystal oscillator Y1 is also divided into two paths, one path is connected with a node between the capacitor C3 and the ground through the capacitor C9, and the other path is connected with a pin 1 of the master controller U3; the anode of the light emitting diode D2 is connected with the 13 pins of the master controller U3 through the capacitor C2, and the cathode is grounded through the resistor R2; 28 pins of the master controller U3 are divided into two paths, one path is grounded through the capacitor C1, and the other path is connected with a VCC power supply; the anode of the light emitting diode D1 is connected with the 26 pins of the master controller U3, and the cathode is connected with the node between the capacitor C1 and the ground; the cathode of the light emitting diode D3 is connected with the pin 25 of the master controller U3 through the resistor R4, and the anode is connected with the node between the pin 28 of the master controller U3 and the VCC power supply.

The power supply module comprises a voltage stabilizer U2, a capacitor C4, a capacitor C5, a capacitor C6 and a capacitor C7; the 1 pin of the voltage stabilizer U2 is divided into three paths, the first path is connected with an input power supply, the second path is grounded through the capacitor C4, and the last path is connected with the node between the capacitor C4 and the ground through the capacitor C5; pin 3 of the voltage stabilizer U2 is grounded; the 2 pins of the voltage stabilizer U2 are divided into three paths, the first path outputs VCC power outwards, the second path is grounded through the capacitor C7, and the last path is connected with the node between the capacitor C7 and the ground through the capacitor C6.

The memory module comprises a memory U4, a resistor R20 and a resistor R21; pins 1-4 of the memory U4 are commonly grounded; the 8 pins of the memory U4 are connected with a VCC power supply; the 7 pin of the memory U4 is grounded; the 6 pins of the memory U4 are divided into two paths, one path is connected with a node between the 8 pins of the memory U4 and a VCC power supply through the resistor R20, and the other path is connected with the 14 pins of the master controller U3 through the resistor R14; the 5 pins of the memory U4 are divided into two paths, one path is connected with the node between the 8 pins of the memory U4 and a VCC power supply through the resistor R21, and the other path is connected with the 15 pins of the main controller U3 through the resistor R15.

The interface module comprises a sub-card connector P1 and a sub-card connector P2, wherein 1 pin of the sub-card connector P1 is divided into two paths, one path is connected with 48 pins of the main controller U3 through a resistor R6, and the other path is connected with a VCC power supply through a resistor R33; the 2 pins of the daughter card connector P1 are divided into two paths, one path is connected with the 47 pin of the master controller U3 through a resistor R7, and the other path is connected with a node between the resistor R33 and a VCC power supply through a resistor R32; the 3 pins of the daughter card connector P1 are divided into two paths, one path is connected with a VCC power supply through a resistor R17, and the other path is connected with the 45 pins of the master controller U3 through a resistor R9; the 4 pins of the daughter card connector P1 are divided into two paths, one path is connected with the node of the resistor R17 and a VCC power supply through a resistor R16, and the other path is connected with the 46 pins of the master controller U3 through a resistor R8; the 1 pin of the daughter card connector P2 is divided into two paths, one path is connected with the 40 pin of the master controller U3 through a resistor R10, and the other path is connected with a node between the resistor R33 and a VCC power supply through a resistor R31; the 2 pins of the daughter card connector P2 are divided into two paths, one path is connected with the 39 pin of the master controller U3 through a resistor R11, and the other path is connected with a node between the resistor R33 and a VCC power supply through a resistor R30; the 3 pins of the daughter card connector P2 are divided into two paths, one path is connected with a node between the resistor R17 and a VCC power supply through a resistor R19, and the other path is connected with the 38 pins of the master controller U3 through a resistor R12; the 4 pins of the daughter card connector P2 are divided into two paths, one path is connected with a node between the resistor R17 and a VCC power supply through a resistor 18, and the other path is connected with the 37 pin of the master controller U3 through a resistor R13.

The utility model has the advantages that: the utility model discloses a bus switching module is used for directly upgrading serial devices to the USB bus, makes things convenient for the transmission data, promotes the scalability of bottom plate through setting up interface module, makes things convenient for the student to build the circuit and does the experiment, makes the bottom plate have certain memory capacity through setting up storage module, conveniently takes notes the experimental data of doing on the teaching bottom plate, under the prerequisite of guaranteeing the bottom plate function, has simplified the structure, effective reduction in production cost, the practicality is high, is fit for using widely on a large scale.

Drawings

The present invention will be further explained with reference to the drawings and examples.

Fig. 1 is a block diagram of the present invention;

fig. 2 is a first part of a circuit schematic of the present invention;

fig. 3 is a second part of the circuit schematic of the present invention;

fig. 4 is a third part of the circuit schematic of the present invention;

fig. 5 is a fourth part of the circuit schematic of the present invention;

fig. 6 is a fifth part of the circuit schematic of the present invention.

Detailed Description

Referring to fig. 1 to 6, an ELVIS-based teaching circuit board includes a main control module, a bus switching module, a storage module, a power supply module, and an interface module; the main control module is respectively and electrically connected with the bus switching module, the storage module and the interface module, and the power supply module provides working power supply for each module.

In this embodiment, the main control module includes a main controller U3, a light emitting diode D4, a light emitting diode D5, a light emitting diode D6, a light emitting diode D7, and a capacitor C10; the type of the master controller U3 is IAP15W4K58S4, a pin 17 of the master controller U3 is connected with the anode of the light-emitting diode D5, and the cathode of the light-emitting diode D5 is grounded through a resistor R23; the 16 pins of the master controller U3 are connected with the anode of the light emitting diode D4, and the cathode of the light emitting diode D4 is connected with the node between the cathode of the light emitting diode D5 and the ground through a resistor R22; one end of the capacitor is connected with a VCC power supply, and the other end of the capacitor is connected with a node between the cathode of the light emitting diode D5 and the ground; the anode of the light emitting diode D6 is connected with a VCC power supply, and the cathode is connected with 2 pins of the master controller U3 through a resistor R28; the anode of the light-emitting diode D7 is connected with the node of the anode of the light-emitting diode D6 and a VCC power supply, and the cathode is connected with the 3 pins of the master controller U3 through a resistor R29; the light emitting diode D4, the light emitting diode D5, the light emitting diode D6 and the light emitting diode D7 can have self-defined functions according to experimental requirements, in the embodiment, the main controller U3 is further connected with a key module, and the key module comprises a key S1, a key S2, a resistor R34 and a resistor R35; one end of the key S1 is grounded, the other end of the key S1 is connected with a VCC power supply, one end of the key S2 is connected with a node between the key S1 and the ground, the other end of the key S1 is connected with a node between the key S1 and the VCC power supply, and a user can perform self-defining functions on the key S1 and the key S2 according to experimental requirements; in this embodiment, pins 49, 50, 51, and 52 of the master U3 communicate with the ELVIS platform.

The bus switching module comprises a bus switching chip U1 (with the model number of CH341A), a plug connector P4, a plug connector P7, a crystal oscillator Y1, a diode D1, a light-emitting diode D2, a light-emitting diode D3, a resistor R2, a resistor R3, a resistor R4, a resistor R5, a capacitor C1, a capacitor C2, a capacitor C3, a capacitor C8 and a capacitor C9; pin 1 of the plug connector P4 is grounded, pin 2 of the plug connector P4 is connected with pin 5 of the bus adapter chip U1, pin 3 of the plug connector P4 is connected with pin 4 of the bus adapter chip U1, pin 4 of the plug connector P4 is divided into two paths, one path is connected with pin 1 of the plug connector P7, and the other path is connected with pin 4 of the plug connector P7;

pins

2, 3, 5 and 6 of the plug-in connector P7 are connected with a VCC power supply; the 6 pins of the master U3 are grounded through C3; one end of the crystal oscillator Y1 is divided into two paths, one path is connected with a node between the capacitor C3 and the ground through the capacitor C8, and the other path is connected with a 2 pin of the master controller U3; the other end of the crystal oscillator Y1 is also divided into two paths, one path is connected with a node between the capacitor C3 and the ground through the capacitor C9, and the other path is connected with a pin 1 of the master controller U3; the anode of the light emitting diode D2 is connected with the 13 pins of the master controller U3 through the capacitor C2, and the cathode is grounded through the resistor R2; 28 pins of the master controller U3 are divided into two paths, one path is grounded through the capacitor C1, and the other path is connected with a VCC power supply; the anode of the light emitting diode D1 is connected with the 26 pins of the master controller U3, and the cathode is connected with the node between the capacitor C1 and the ground; the cathode of the light emitting diode D3 is connected with the pin 25 of the master controller U3 through the resistor R4, and the anode is connected with the node between the pin 28 of the master controller U3 and a VCC power supply; in this embodiment, the USB interface device is used for directly upgrading a serial device to a USB bus, and is electrically connected to the main controller U3 through a plug P6 and a plug P9, specifically, a pin 1 and a pin 8 of the plug P6 are respectively connected to a pin 1 and a pin 4 of the plug P9; the 2 pins of the plug P6 are connected with the 17 pins of the bus adapter chip U1; the 3 pins of the plug P6 are connected with the 16 pins of the bus adapter chip U1; the 4 pins of the plug P6 are connected with the 15 pins of the bus adapter chip U1; the 5 pins of the plug P6 are connected with the 20 pins of the bus adapter chip U1; the 7 pins of the plug P6 are connected with the 22 pins of the bus adapter chip U1; the pin 9 and the pin 10 of the plug-in connector P6 are connected with a 5V power supply; the pin 11 and the pin 12 of the plug-in connector P6 are connected with a 3.3V power supply; the pin 13 of the plug P6 is connected with the pin 23 of the bus adapter chip U1; the 14 pins of the plug P6 are connected with the 24 pins of the bus adapter chip U1; the 2 pins of the plug-in connector P9 are connected with the 10 pins of a bus adapter chip U1; the 3 pins of the plug-in connector P9 are connected with the 9 pins of a bus adapter chip U1; pin 5 of the socket P9 is connected to pin 26 of the master U3; pin 6 of the socket P9 is connected to pin 27 of the master U3; in this embodiment, the bus adaptor chip U1 is further connected to a plug connector P3, specifically, pin 1 of the plug connector P3 is connected to pin 14 of the bus adaptor chip U1 through a resistor R1, pin 2 of the plug connector P3 is grounded, pin 3 of the plug connector P3 is connected to pin 27 of the bus adaptor chip U1, the plug connector P3 is used for outputting a USB device configuration completion state, when a USB device is not configured or is not configured, pin 3 of the plug connector P3 outputs a high level, and when a USB device is configured, the pin outputs a low level; in this embodiment, the plug P4 is responsible for program downloading and data communication of the single chip microcomputer, and the plug P7 is a power supply interface selection, and selects power supply through a USB port or a bottom plate.

In this embodiment, the power module includes a voltage regulator U2 (model number is AMS1117), a capacitor C4, a capacitor C5, a capacitor C6, and a capacitor C7; the 1 pin of the voltage stabilizer U2 is divided into three paths, the first path is connected with an input power supply, the second path is grounded through the capacitor C4, and the last path is connected with the node between the capacitor C4 and the ground through the capacitor C5; pin 3 of the voltage stabilizer U2 is grounded; the 2 pins of the voltage stabilizer U2 are divided into three paths, the first path outputs a VCC power supply, the second path is grounded through the capacitor C7, and the last path is connected to a node between the capacitor C7 and the ground through the capacitor C6.

In the embodiment, the memory module comprises a memory U4 (model number is 24C64), a resistor R20 and a resistor R21; pins 1-4 of the memory U4 are commonly grounded; the 8 pins of the memory U4 are connected with a VCC power supply; the 7 pin of the memory U4 is grounded; the 6 pins of the memory U4 are divided into two paths, one path is connected with a node between the 8 pins of the memory U4 and a VCC power supply through the resistor R20, and the other path is connected with the 14 pins of the master controller U3 through the resistor R14; the 5 pins of the memory U4 are divided into two paths, one path is connected with a node between the 8 pins of the memory U4 and a VCC power supply through the resistor R21, and the other path is connected with the 15 pins of the master controller U3 through the resistor R15; wherein, 5 pins of the memory U4 are used for bidirectional data transmission, 6 pins are used for serial clock input, and at the rising edge of SCL, the data of the memory U4 is written; on the falling edge of SCL, the data in memory U4 is read out.

The interface module comprises a sub-card connector P1 and a sub-card connector P2, wherein 1 pin of the sub-card connector P1 is divided into two paths, one path is connected with 48 pins of the main controller U3 through a resistor R6, and the other path is connected with a VCC power supply through a resistor R33; the 2 pins of the daughter card connector P1 are divided into two paths, one path is connected with the 47 pin of the master controller U3 through a resistor R7, and the other path is connected with a node between the resistor R33 and a VCC power supply through a resistor R32; the 3 pins of the daughter card connector P1 are divided into two paths, one path is connected with a VCC power supply through a resistor R17, and the other path is connected with the 45 pins of the master controller U3 through a resistor R9; the 4 pins of the daughter card connector P1 are divided into two paths, one path is connected with the node of the resistor R17 and a VCC power supply through a resistor R16, and the other path is connected with the 46 pins of the master controller U3 through a resistor R8; the 1 pin of the daughter card connector P2 is divided into two paths, one path is connected with the 40 pin of the master controller U3 through a resistor R10, and the other path is connected with a node between the resistor R33 and a VCC power supply through a resistor R31; the 2 pins of the daughter card connector P2 are divided into two paths, one path is connected with the 39 pin of the master controller U3 through a resistor R11, and the other path is connected with a node between the resistor R33 and a VCC power supply through a resistor R30; the 3 pins of the daughter card connector P2 are divided into two paths, one path is connected with a node between the resistor R17 and a VCC power supply through a resistor R19, and the other path is connected with the 38 pins of the master controller U3 through a resistor R12; the 4 pins of the daughter card connector P2 are divided into two paths, one path is connected with a node between the resistor R17 and a VCC power supply through a resistor 18, and the other path is connected with the 37 pins of the master controller U3 through a resistor R13; in this embodiment, pin 47 and pin 48 of the master controller U3 are used for ID identification of the daughter card connector P1, pin 39 and pin 40 of the master controller U3 are used for ID identification of the daughter card connector P2, and students can build a circuit on a teaching bottom plate through the daughter card connector P1 and the daughter card connector P2 to perform experiments, so that the circuit is not only used on an ELVIS platform, but also can measure and perform circuit experiments on boards on other platforms (such as an ICT platform), and the practicability of products is effectively improved.

The above embodiments do not limit the scope of the present invention, and those skilled in the art can make equivalent modifications and variations without departing from the overall concept of the present invention.

Claims

1. An ELVIS-based teaching circuit bottom board is characterized by comprising a main control module, a bus switching module, a storage module, a power supply module and an interface module; the main control module is respectively and electrically connected with the bus switching module, the storage module and the interface module, and the power supply module provides working power supply for each module.

2. The ELVIS-based teaching circuit board of claim 1, wherein the master control module comprises a master controller U3, a light emitting diode D4, a light emitting diode D5, a light emitting diode D6, a light emitting diode D7 and a capacitor C10; the 17 pins of the master controller U3 are connected with the anode of the light-emitting diode D5, and the cathode of the light-emitting diode D5 is grounded through a resistor R23; the 16 pins of the master controller U3 are connected with the anode of the light emitting diode D4, and the cathode of the light emitting diode D4 is connected with the node between the cathode of the light emitting diode D5 and the ground through a resistor R22; one end of the capacitor is connected with a VCC power supply, and the other end of the capacitor is connected with a node between the cathode of the light emitting diode D5 and the ground; the anode of the light emitting diode D6 is connected with a VCC power supply, and the cathode is connected with 2 pins of the master controller U3 through a resistor R28; the anode of the light emitting diode D7 is connected with the node of the anode of the light emitting diode D6 and a VCC power supply, and the cathode is connected with the 3 pins of the master controller U3 through a resistor R29.

3. The ELVIS-based teaching circuit board of claim 2, wherein the bus interface module comprises a bus interface chip U1, a connector P4, a connector P7, a crystal oscillator Y1, a diode D1, a light emitting diode D2, a light emitting diode D3, a resistor R2, a resistor R3, a resistor R4, a resistor R5, a capacitor C1, a capacitor C2, a capacitor C3, a capacitor C8 and a capacitor C9; pin 1 of the plug connector P4 is grounded, pin 2 of the plug connector P4 is connected with pin 5 of the bus adapter chip U1, pin 3 of the plug connector P4 is connected with pin 4 of the bus adapter chip U1, pin 4 of the plug connector P4 is divided into two paths, one path is connected with pin 1 of the plug connector P7, and the other path is connected with pin 4 of the plug connector P7; pins 2, 3, 5 and 6 of the plug-in connector P7 are connected with a VCC power supply; the 6 pins of the master U3 are grounded through C3; one end of the crystal oscillator Y1 is divided into two paths, one path is connected with a node between the capacitor C3 and the ground through the capacitor C8, and the other path is connected with a 2 pin of the master controller U3; the other end of the crystal oscillator Y1 is also divided into two paths, one path is connected with a node between the capacitor C3 and the ground through the capacitor C9, and the other path is connected with a pin 1 of the master controller U3; the anode of the light emitting diode D2 is connected with the 13 pins of the master controller U3 through the capacitor C2, and the cathode is grounded through the resistor R2; 28 pins of the master controller U3 are divided into two paths, one path is grounded through the capacitor C1, and the other path is connected with a VCC power supply; the anode of the light emitting diode D1 is connected with the 26 pins of the master controller U3, and the cathode is connected with the node between the capacitor C1 and the ground; the cathode of the light emitting diode D3 is connected with the pin 25 of the master controller U3 through the resistor R4, and the anode is connected with the node between the pin 28 of the master controller U3 and the VCC power supply.

4. The ELVIS-based teaching circuit board of claim 1, wherein the power module includes a voltage regulator U2, a capacitor C4, a capacitor C5, a capacitor C6 and a capacitor C7; the 1 pin of the voltage stabilizer U2 is divided into three paths, the first path is connected with an input power supply, the second path is grounded through the capacitor C4, and the last path is connected with the node between the capacitor C4 and the ground through the capacitor C5; pin 3 of the voltage stabilizer U2 is grounded; the 2 pins of the voltage stabilizer U2 are divided into three paths, the first path outputs VCC power outwards, the second path is grounded through the capacitor C7, and the last path is connected with the node between the capacitor C7 and the ground through the capacitor C6.

5. The ELVIS-based teaching circuit board of claim 2, wherein the memory module includes a memory U4, a resistor R20 and a resistor R21; pins 1-4 of the memory U4 are commonly grounded; the 8 pins of the memory U4 are connected with a VCC power supply; the 7 pin of the memory U4 is grounded; the 6 pins of the memory U4 are divided into two paths, one path is connected with a node between the 8 pins of the memory U4 and a VCC power supply through the resistor R20, and the other path is connected with the 14 pins of the master controller U3 through the resistor R14; the 5 pins of the memory U4 are divided into two paths, one path is connected with the node between the 8 pins of the memory U4 and a VCC power supply through the resistor R21, and the other path is connected with the 15 pins of the main controller U3 through the resistor R15.

6. The ELVIS-based teaching circuit board of claim 2, wherein the interface module comprises a daughter card connector P1 and a daughter card connector P2, wherein pin 1 of the daughter card connector P1 is divided into two paths, one path is connected to pin 48 of the master controller U3 through a resistor R6, and the other path is connected to a VCC power supply through a resistor R33; the 2 pins of the daughter card connector P1 are divided into two paths, one path is connected with the 47 pin of the master controller U3 through a resistor R7, and the other path is connected with a node between the resistor R33 and a VCC power supply through a resistor R32; the 3 pins of the daughter card connector P1 are divided into two paths, one path is connected with a VCC power supply through a resistor R17, and the other path is connected with the 45 pins of the master controller U3 through a resistor R9; the 4 pins of the daughter card connector P1 are divided into two paths, one path is connected with the node of the resistor R17 and a VCC power supply through a resistor R16, and the other path is connected with the 46 pins of the master controller U3 through a resistor R8; the 1 pin of the daughter card connector P2 is divided into two paths, one path is connected with the 40 pin of the master controller U3 through a resistor R10, and the other path is connected with a node between the resistor R33 and a VCC power supply through a resistor R31; the 2 pins of the daughter card connector P2 are divided into two paths, one path is connected with the 39 pin of the master controller U3 through a resistor R11, and the other path is connected with a node between the resistor R33 and a VCC power supply through a resistor R30; the 3 pins of the daughter card connector P2 are divided into two paths, one path is connected with a node between the resistor R17 and a VCC power supply through a resistor R19, and the other path is connected with the 38 pins of the master controller U3 through a resistor R12; the 4 pins of the daughter card connector P2 are divided into two paths, one path is connected with a node between the resistor R17 and a VCC power supply through a resistor 18, and the other path is connected with the 37 pin of the master controller U3 through a resistor R13.

7. The ELVIS-based teaching circuit board of claim 2, wherein the master controller U3 is model IAP15W4K58S 4.