Multi-single-chip microcomputer comprehensive experiment device

Abstract

The utility model discloses a multi-single-chip microcomputer comprehensive experiment device, which is applied to the technical field of teaching devices, and is characterized in that the front wiring of a bare copper wide wire board is determined according to a circuit logic relation, and the wiring has a certain width; an insulating layer is arranged between the back surface of the bare copper wide wire board and the iron plate; pins of the single-chip microcomputer, the single-chip microcomputer selection circuit, the multipath change-over switch circuit and the peripheral interface circuit are welded with magnets and are electrically connected with the bare copper wide line board through the adsorption effect of the magnets and the iron plate; the single-chip microcomputer selection circuit selects a first single-chip microcomputer in the multiple single-chip microcomputers, and the first single-chip microcomputer shares the same peripheral interface circuit through the multipath change-over switch circuit. According to the utility model, experiments of several kinds of single-chip microcomputers can be carried out on one development experiment board, and the single-chip microcomputers share the same peripheral interface circuit; and through reasonable combination and use of the peripheral interface circuit modules, comprehensive and innovative experiment projects of the single-chip microcomputer can be carried out.

Description

Technical Field

[0001] The utility model relates to the technical field of teaching devices, and more specifically to a multi-chip computer comprehensive experimental device. Background Art

[0002] Single-chip microcomputers are now widely used in various fields of life and production. Almost every electronic and mechanical product used in modern life will be integrated with single-chip microcomputers. The learning process of single-chip microcomputers pays special attention to practical operation ability, adaptability and operation experience. Therefore, in the learning process, you should be exposed to different types of single-chip microcomputers as much as possible, fully understand and consolidate the performance of single-chip microcomputers, and expand your own learning surface; in addition, after learning and mastering some basic functions of single-chip microcomputers, you should also explore and learn some technologies closely related to practical applications. The teaching and learning functions of single-chip microcomputer development boards currently on the market are not strong. Students cannot use one device to understand and master the functions of multiple models of single-chip microcomputers as much as possible, nor can they grasp the corresponding chip usage in classroom learning and carry out beneficial extracurricular extensions in time; usually a single-chip microcomputer plus a peripheral interface circuit can only carry out experiments or training on one type of single-chip microcomputer.

[0003] With the development of science and technology, there are more and more types of single-chip microcomputers. If we can conduct experiments with multiple single-chip microcomputers on one experimental board, it will improve circuit utilization, save costs, facilitate learning, and bring us great convenience.

[0004] In addition, the assembly of the experimental device is achieved by inserting pins into sockets. For beginners, connecting the circuit is complicated and boring, which is difficult to stimulate their interest in learning;

[0005] Therefore, how to provide a comprehensive experimental device that can share peripheral circuits among multiple single-chip microcomputers and is easy to assemble is an urgent problem that needs to be solved by those skilled in the art. Utility Model Content

[0006] In view of this, the utility model provides a comprehensive experimental device in which a plurality of single-chip microcomputers share peripheral circuits and are assembled simply to solve the problems in the background technology.

[0007] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0008] The utility model discloses a multi-single-chip computer comprehensive experimental device, comprising: multiple single-chip computers, a single-chip computer selection circuit, a multi-way conversion switch circuit, a bare copper wide line board, an iron plate, a plurality of magnets and a peripheral interface circuit; the front wiring of the bare copper wide line board is determined according to the circuit logic relationship, and the wiring has a certain width; an insulating layer is arranged between the back side of the bare copper wide line board and the iron plate; the pins of the single-chip computer, the single-chip computer selection circuit, the multi-way conversion switch circuit and the peripheral interface circuit are welded with the magnet, and are electrically connected to the bare copper wide line board through the adsorption effect of the magnet and the iron plate; the single-chip computer selection circuit selects the first single-chip computer among the multiple single-chip computers, and the first single-chip computer shares the same peripheral interface circuit through the multi-way conversion switch circuit.

[0009] Preferably, in the above-mentioned multi-single-chip microcomputer comprehensive experimental device, the single-chip microcomputer includes: at least two of: STC89C52 single-chip microcomputer, STC10FXX single-chip microcomputer, STC11FXX single-chip microcomputer, and IAP15FXX single-chip microcomputer.

[0010] Preferably, in the above-mentioned multi-chip microcomputer integrated experimental device, the STC89C52 single-chip microcomputer is electrically connected to the 11.0592MHz crystal oscillator circuit, the power-on reset and key reset circuit, and the USB-TTL download module respectively.

[0011] Preferably, in the above-mentioned multi-chip computer comprehensive experimental device, the peripheral interface circuit is provided with 8 LED indicator lights, 8 seven-segment LED digital tubes, LCD1602 liquid crystal module, 0.96′ OLED display screen module, 4 independent key modules, 4×4 matrix keyboard module, E2PROM memory module, RTC real-time clock module, DS18B20 temperature measurement module, DHT11 temperature and humidity measurement module, infrared receiving module, five-wire four-phase stepping motor drive module, DC motor speed regulation module, relay drive module, buzzer module, PCF8591 analog / digital-digital / analog converter module, LD3320A voice recognition module, communication module, ultrasonic ranging module and J408-β / γ Geiger counter module, and the peripheral interface circuit is connected to the first single-chip computer selected by the single-chip computer selection circuit through a multi-way conversion switch circuit.

[0012] Preferably, in the above-mentioned multi-single-chip computer integrated experimental device, the single-chip computer selection circuit, the multi-way conversion switch circuit, and the peripheral interface circuit are all packaged modules.

[0013] Preferably, in the above-mentioned multi-single-chip computer comprehensive experimental device, it also includes a DC regulated power supply, which outputs a +5V DC voltage; the +5V DC voltage outputs a +3.3V DC voltage through a regulator chip AMS1117.

[0014] Preferably, in the above-mentioned multi-single-chip computer integrated experimental device, the communication module includes an RS-484 communication interface, an RS-232 communication interface, and a USB communication interface.

[0015] Through the above technical scheme, it can be known that compared with the prior art, the utility model discloses a multi-single-chip computer comprehensive experimental device, which includes 20 peripheral interface circuit modules, can cultivate single-chip computer programming and application skills in an all-round way, and select different types of single-chip computers through the single-chip computer selection circuit, and can carry out experiments and design development of multiple single-chip computers on one experimental board, including: 89C51 single-chip computer, STC10F100W single-chip computer, IAP15F2K61S2 single-chip computer, STC11FXX refers to a series of single-chip computers, and this series of single-chip computers can be, for example, it can be: STC10F100W, STC11F32XE, IAP15F2K61S2; these single-chip computers have different pins and functions, but experiments of these single-chip computers can be carried out on a development experimental board, and they share the same peripheral interface circuit; the reasonable combination and use of the peripheral interface circuit modules can also carry out single-chip computer comprehensive and innovative experimental projects. The utility model is assembled by magnetic installation, which simplifies the complex and boring circuit assembly and stimulates the learning interest of beginners. In addition, it can also be used as a training tool for embedded system and application development learning and electronic subject competitions, and has good engineering practice education value and market prospects. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0017] Figure 1 It is a system principle block diagram of the utility model.

[0018] Figure 2 The utility model is a circuit schematic diagram of a STC89C52 single-chip microcomputer core board module.

[0019] Figure 3 This is a circuit schematic diagram of a USB interface power supply / download / serial communication module of the utility model.

[0020] Figure 4 The utility model is a circuit schematic diagram of a power supply decoupling capacitor module.

[0021] Figure 5 This is a circuit schematic diagram of a running water lamp module of the peripheral interface circuit part of the utility model.

[0022] Figure 6 This is a circuit schematic diagram of the LCD1602 liquid crystal display module of the peripheral interface circuit part of the utility model.

[0023] Figure 7 This is a circuit schematic diagram of a 0.96′ OLED display module of the peripheral interface circuit part of the utility model.

[0024] Figure 8 This is a circuit schematic diagram of an independent key module of a peripheral interface circuit part of the utility model.

[0025] Fig. 9 The utility model is a circuit schematic diagram of a 4×4 matrix key module of a peripheral interface circuit part.

[0026] Fig.10 The utility model discloses an 8-bit digital tube dynamic display module circuit schematic diagram of the peripheral interface circuit part.

[0027] Fig.11 The utility model discloses a pull-up resistor circuit schematic diagram of an I / O port of a core board of an STC89C52 single-chip microcomputer.

[0028] Fig.12 This is a circuit schematic diagram of the E2PROM module of the peripheral interface circuit part of the utility model.

[0029] Fig.13 This is a circuit schematic diagram of the RTC clock chip DS1302 module of the peripheral interface circuit part of the utility model.

[0030] Fig.14 The utility model is a circuit schematic diagram of a 3.3V voltage stabilizing module of a DC power supply part.

[0031] Fig.15 This is the circuit schematic diagram of the DHT11 temperature and humidity sensor module, which is the peripheral interface circuit part of the utility model.

[0032] Fig.16 This is the circuit schematic diagram of the DS18B20 temperature sensor module, which is the peripheral interface circuit part of the utility model.

[0033] Fig.17 This is the circuit principle diagram of the HS0038 infrared receiving module, which is the peripheral interface circuit part of the utility model.

[0034] Fig.18 It is a circuit schematic diagram of a stepper motor / DC motor / relay drive module of the peripheral interface circuit part of the utility model.

[0035] Fig.19 It is a circuit schematic diagram of the ESP8266 WIFI wireless communication module, which is the peripheral interface circuit part of the utility model.

[0036] Fig. 20 This is the circuit schematic diagram of the HC SR04 ultrasonic distance measurement module, which is the peripheral interface circuit part of the utility model.

[0037] Fig.21 The utility model is a circuit schematic diagram of a buzzer module of a peripheral interface circuit part.

[0038] Fig. 22 This is the circuit principle diagram of the LD3320A speech recognition module, which is the peripheral interface circuit part of the utility model.

[0039] Fig.23 This is a schematic diagram of the PCF8591 analog-to-digital / module circuit of the peripheral interface circuit part of the utility model.

[0040] Fig.24 The utility model is a circuit schematic diagram of a Geiger counter module of a peripheral interface circuit part.

[0041] Fig.25 It is a top view of the bare copper wide line board of the utility model. DETAILED DESCRIPTION

[0042] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0043] See also Figure 1 It is a system principle block diagram of the utility model, that is, a multi-single-chip computer comprehensive experimental device, including: multiple single-chip computers, a single-chip computer selection circuit, a multi-way conversion switch circuit, a bare copper wide line board, an iron plate, a plurality of magnets and a peripheral interface circuit; the front wiring of the bare copper wide line board is determined according to the circuit logic relationship, and the wiring has a certain width; an insulating layer is arranged between the back of the bare copper wide line board and the iron plate; the pins of the single-chip computer, the single-chip computer selection circuit, the multi-way conversion switch circuit, and the peripheral interface circuit are welded with the magnet, and are electrically connected to the bare copper wide line board through the adsorption effect of the magnet and the iron plate; the single-chip computer selection circuit selects the first single-chip computer among the multiple single-chip computers, and the first single-chip computer shares the same peripheral interface circuit through the multi-way conversion switch circuit.

[0044] What needs to be understood is that by switching channels through a multiplexer, users can conveniently select the corresponding microcontroller through buttons, and then switch to the required circuit through the multiplexer.

[0045] In order to further optimize the above technical solution, the single chip microcomputer includes: at least two of the STC89C52 single chip microcomputer, the STC10FXX single chip microcomputer, the STC11FXX single chip microcomputer, and the IAP15FXX single chip microcomputer.

[0046] In order to further optimize the above technical solution, the single chip microcomputer selection circuit, the multi-way conversion switch circuit, and the peripheral interface circuit are all packaged modules.

[0047] Specifically, this embodiment takes the STC89C52 single-chip microcomputer as the first single-chip microcomputer, and uses a multiplexer switch circuit to share the same peripheral interface circuit as an example;

[0048] The STC89C52 single-chip computer is connected to the crystal oscillator circuit, reset circuit, and I / O port expansion interface. The DC regulated power supply module is provided with a +5V power supply and a +3V power supply connected to the USB interface. The peripheral interface circuit module is provided with 8 LED indicator lights, 8 seven-segment LED digital tubes, LCD1602 liquid crystal module, 0.96′OLED display module, 4 independent key modules, 4×4 matrix keyboard module, E2PROM memory module, RTC real-time clock module, DS18B20 temperature measurement module, DHT11 temperature and humidity measurement module, infrared receiving module, five-wire four-phase stepping motor drive module, DC motor speed regulation module, relay drive module, buzzer module, PCF8591 analog / digital-digital / analog converter module, LD3320A voice recognition module, ESP8266-12F WIFI wireless communication module, ultrasonic ranging module and J408-β / γ Geiger counter module.

[0049] See also Figure 2 , Fig.11 This is the circuit schematic diagram of the single-chip microcomputer core board module of the utility model. The crystal oscillator circuit uses a 11.0592MHz quartz crystal oscillator. The reset circuit has power-on reset and manual button reset functions. The I / O port of the single-chip microcomputer chip is connected to a 10kΩ pull-up resistor.

[0050] See also Figure 3 , Figure 4 and Fig.14 This is the circuit schematic diagram of the DC regulated power supply module of the utility model. The USB interface connection selection switch provides +5V DC power supply for this experimental device, and outputs 3.3V DC power supply through the voltage regulator chip AMS1117. A DC power supply decoupling capacitor is provided to eliminate high-frequency noise and interference signals in the power supply to ensure the stable operation of the circuit. The USB interface is connected to the CH340G chip to realize program download or serial communication function.

[0051] See also Figure 5This is the circuit principle diagram of the utility model running water lamp module, the anodes of 8 LEDs are connected to the +5V power supply, and the cathodes are connected to the I / O port of the single chip computer.

[0052] See also Figure 6 This is the circuit schematic diagram of the LCD1602 liquid crystal display module of the utility model. Pin V0 is connected to a 5kΩ potentiometer, and the contrast of the liquid crystal display is controlled by adjusting the voltage. Pin RS is a command / data selection pin, pin RW is a read / write selection pin, pin E is an enable pin, and D0~D7 are data pins.

[0053] See also Figure 7 This is a circuit schematic diagram of a 0.96′ OLED display module of the utility model, which adopts an I 2C bus interface to connect to the I / O port of a STC89C52 single-chip microcomputer.

[0054] See also Figure 8 , Fig. 9 This is the circuit schematic diagram of the independent key module and the matrix keyboard module of the utility model. One end of the key of the independent key module is grounded, and the other end is connected to the I / O port of the microcontroller. The matrix keyboard module uses keys to form a 4×4 array keyboard, and 8 terminals are connected to the I / O port of the microcontroller.

[0055] See also Fig.10 This is a circuit schematic diagram of an 8-bit digital tube dynamic display module of the utility model. The COM end of the common anode digital tube is connected to the power supply VCC via the transistor S8550, the base of the transistor S8550 is connected to the 74HC138 chip via a 1kΩ resistor as a bit selection control, and the input end of the common anode digital tube is connected to the 74HC245C chip as a segment selection control.

[0056] See also Fig.12 This utility model E 2 PROM memory module circuit schematic diagram, the module through I 2 C bus connects the I / O port of STC89C52 microcontroller.

[0057] See also Fig.13 This is a circuit schematic diagram of a DS1302 RTC clock chip module of the utility model. The module is connected to the I / O port of the STC89C52 single-chip computer via an SPI three-wire interface.

[0058] See also Fig.15 This is a circuit schematic diagram of a DHT11 temperature and humidity sensor module of the utility model. The module is connected to the I / O port of the STC89C52 single-chip computer through a single-line interface DATA.

[0059] See also Fig.16 This is a circuit schematic diagram of a DS18B20 temperature sensor module of the utility model. The module is connected to an I / O port of a STC89C52 single-chip computer via a single-line interface DQ.

[0060] See also Fig.17 This is a circuit schematic diagram of the utility model HS0038 infrared receiving module, which is connected to the I / O port of the STC89C52 single-chip computer through a single-line interface OUT.

[0061] See also Fig.18 The utility model discloses a circuit schematic diagram of a stepper motor, a DC motor and a relay drive module. The drive module is connected to an I / O port of a STC89C52 single-chip computer via a Darlington tube ULN2003 chip.

[0062] See also Fig.19 This is the circuit schematic diagram of the utility model ESP8266 WIFI wireless communication module. The module is powered by a 3.3V power supply. The serial communication terminals TXD and RXD of the ESP8266-12F chip are connected to the P31 / TXD and P30 / RXD ports of the STC89C52 microcontroller.

[0063] See also Fig. 20 This is the circuit schematic diagram of the utility model HC-SR04 ultrasonic distance measurement module.

[0064] See also Fig.21 This is a circuit schematic diagram of a buzzer module of the utility model.

[0065] See also Fig. 22 This is a circuit schematic diagram of the utility model LD3320A voice recognition module, which is connected to the STC89C52 serial port.

[0066] See also Fig.23 This is a circuit schematic diagram of the PCF8591 analog-to-digital / digital-to-analog conversion module of the utility model. The analog input includes a photoresistor, a thermistor, a potentiometer, etc., which is connected to the STC89C52 single-chip computer through an I2C bus interface.

[0067] See also Fig.24 This is the circuit schematic diagram of the Geiger counter module of the utility model. The J408-β / γ type Geiger tube is connected to the base of the transistor S9013, and the collector of the transistor S9013 is connected to the STC89C52 single-chip computer through a 2-stage inverter.

[0068] See also Fig.25 It is a top view of the bare copper wide line board of the utility model, wherein the line 1 is set to have a certain width in order to facilitate contact with the magnet on the component pin, but because the magnet cannot be adsorbed on the bare copper, it is also necessary to stick an iron plate of the same size as the circuit board behind the bare copper wide line board, and glue with good insulation properties should be used between the iron plate and the circuit board of the bare copper wide line board to prevent the iron plate from contacting the circuit behind the circuit board and causing a short circuit on the circuit board.

[0069] The utility model is a comprehensive and innovative experimental device based on the STC89C51RC single-chip microcomputer, with abundant peripheral interface circuit modules. Through the combination configuration of different modules on the experimental device, comprehensive experiments and innovative experiments of the single-chip microcomputer can be carried out.

[0070] In this specification, each embodiment is described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the embodiments can be referred to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant parts can be referred to the method part.

[0071] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A multi-chip microcomputer comprehensive experimental device, characterized in that: include: Multiple single-chip microcomputers, a single-chip microcomputer selection circuit, a multi-way conversion switch circuit, a bare copper wide-line board, an iron plate, a number of magnets and a peripheral interface circuit; the front wiring of the bare copper wide-line board is determined according to the circuit logic relationship, and the wiring has a certain width; an insulating layer is arranged between the back of the bare copper wide-line board and the iron plate; the pins of the single-chip microcomputer, the single-chip microcomputer selection circuit, the multi-way conversion switch circuit and the peripheral interface circuit are welded with the magnet, and are electrically connected to the bare copper wide-line board through the adsorption effect of the magnet and the iron plate; the single-chip microcomputer selection circuit selects the first single-chip microcomputer among the multiple single-chip microcomputers, and the first single-chip microcomputer shares the same peripheral interface circuit through the multi-way conversion switch circuit.

2. A multi-chip microcomputer comprehensive experimental device according to claim 1, characterized in that: The single chip microcomputer comprises: at least two of the STC89C52 single chip microcomputer, the STC10FXX single chip microcomputer, the STC11FXX single chip microcomputer and the IAP15FXX single chip microcomputer.

3. A multi-chip microcomputer comprehensive experimental device according to claim 2, characterized in that: The STC89C52 single chip microcomputer is electrically connected to the 11.0592MHz crystal oscillator circuit, the power-on reset and key reset circuits, and the USB-TTL download module respectively.

4. The multi-chip microcomputer comprehensive experimental device according to claim 1 is characterized in that: The peripheral interface circuit is provided with 8 LED indicator lights, 8 seven-segment LED digital tubes, LCD1602 liquid crystal module, 0.96′ OLED display screen module, 4 independent key modules, 4×4 matrix keyboard module, E2PROM memory module, RTC real-time clock module, DS18B20 temperature measurement module, DHT11 temperature and humidity measurement module, infrared receiving module, five-wire four-phase stepping motor drive module, DC motor speed regulation module, relay drive module, buzzer module, PCF8591 analog / digital-digital / analog converter module, LD3320A voice recognition module, communication module, ultrasonic distance measurement module and J408-β / γ Geiger counter module. The peripheral interface circuit is connected to the first single-chip microcomputer selected by the single-chip microcomputer selection circuit through a multi-way conversion switch circuit.

5. The multi-chip microcomputer comprehensive experimental device according to claim 1 is characterized in that: The single chip computer selection circuit, the multi-way conversion switch circuit, and the peripheral interface circuit are all packaged modules.

6. The multi-chip microcomputer comprehensive experimental device according to claim 1 is characterized in that: It also includes a DC regulated power supply, which outputs a +5V DC voltage; the +5V DC voltage outputs a +3.3V DC voltage through a regulator chip AMS1117.

7. The multi-chip microcomputer comprehensive experimental device according to claim 1 is characterized in that: The communication module includes RS-484 communication interface, RS-232 communication interface and USB communication interface.

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