Single-chip technology application training device

ZN-7600S MCU technology application training device
1. Design concept
1. Easy entry, concise but not simple. In order to make entry easy, we adopt a simple and easy-to-understand layout design, starting from a basic marquee to allow you to seamlessly cut through teaching. Regardless of the huge volume of the experiment table, each module is so lightweight, you can bring any module into the classroom when you are teaching, and most of the modules are hollowed out on the back under the premise of ensuring safety. This allows you to let students see at a glance and can touch it, which is very important. Because we know the importance of perceptual knowledge. Of course, you can rest assured of safety issues, we have done protection for the parts that may cause safety hazards.
2. Ergonomic, beautiful and comfortable traditional vertical experiment table, mostly adopts vertical screen structure. This structure makes students need to stand when performing most experiments, which is prone to fatigue, and the forward perspective is not conducive to thinking. At the same time, due to the high height of the vertical screen, the students' vision is blocked during the experiment class, which is not convenient for the teacher to explain. The flat module structure is adopted, so that the line of sight tends to naturally downward, just like reading and writing in normal times. It is slightly inclined near the user side, which makes the operation more convenient. When looking up at the same time, the line of sight is unobstructed. You can listen to the lecture conveniently, and the teacher can also observe the experiment.
3. Pay attention to details, the texture at first sight strictly adopts the aluminum material with the smooth finish and the thickness meets the high-quality requirements. Each board is made of real materials, with a thickness of 8mm or more, and has undergone a custom-made furniture-level edge banding process. The classic combination of black wood grain and silver will make you fall in love at first sight, a timeless classic. From the height of the table, to the processing behind each module, and even the position of each hole, careful consideration has been carried out. All careful consideration is only to make it more beautiful, convenient and durable.
4. A high degree of openness, stimulating innovation, and adopting modular design. We do not simply design modules individually, but comprehensively consider the connection, possibility, and functionality of the modules, plus more than ten years of research and development experience, making the modules Increasingly classic and open. To provide classic experimental projects, we recommend that users use highly open modules to design their own experimental projects.
5. Close to reality and easy to expand. Through more than ten years of communication with users in the market, valuable practical experience has been obtained. We are well aware of the importance of combining teaching with actual production. Therefore, whether it is from the design of experimental projects or specially designed dozens of training packages.
6. Easy to manage and easy to maintain. The beautiful cabinet is designed differently from the past, which is as comfortable as your home furniture. The superior casters are easy to move and fix. At the same time, you can choose to equip instrument placement partitions, data placement partitions and other intimate designs, allowing you to easily and beautifully place commonly used instruments and materials that need to be queried during experiments. At the same time, it adopts an exquisite small module design, and a single failure will not cause the destruction of the entire system. If it is damaged, you only need to replace the corresponding small module, which is convenient and worry-free.
2. Equipment technical indicators
1. Input power: single-phase AC 220V±10% (50Hz)
2. Output power: DC±12V±5%/1A; DC±5V±5%/1A; DC24V±5%/1.5A
3. Temperature: -10～40℃; Ambient humidity: ≤90% (25℃)
4. Dimensions: about 1225mm×690mm×820mm (L×W×H)
5. Power consumption of the whole machine: ≤0.5kW
6. Safety protection measures: It has the functions of grounding protection and leakage protection, and the safety meets the relevant national standards. The mains uses high-insulation safety sockets and high-strength safety test leads with insulating sheaths.

3. Functional characteristics
1. Overall structure The
ZN-7600S single chip microcomputer technology application training device adopts the structural design of training table plus training module, the module adopts standard structure, and the interchangeability is strong; according to the principle of input, output, data conversion and other functions Determine the content of the module so that you can easily select the required module during teaching or competition.
Each module of the ZN-7600S single-chip microcomputer technology application training device has two wiring methods, one is the electronic connection method, and the 8-bit data bus can also be connected by DuPont cable. The entire connection process is convenient and quick. All components with interference properties are isolated by photoelectric isolation devices to ensure the safety and stability of the system.
2. Functional characteristics of each functional module
(1) Host module The
single-chip microcomputer adopts AT89S52. This one-chip computer is equipped with 256Byte RAM and 8KByte FLASH, three 16-bit timers, two data pointers, and a watchdog circuit is integrated on the chip. 64KRAM expansion space, 64KROM expansion space; 32 IO ports, 6 vector interrupt sources; 0 _{33MHz operating frequency, three-level program encryption function; working voltage 4.0V} 5.5V. The use of DIP40 package is convenient for chip replacement and simulation. And it is designed with an in-system download design interface, which can be easily programmed through a USB downloader without removing the single-chip microcomputer from the circuit.
There is also a serial communication interface on the module. The interface has been added to the boost circuit and can directly communicate with the computer. The single-chip microcomputer and the single-chip microcomputer can also download programs through this port. A manual reset button is added to the reset circuit, which can be directly reset. There is also an active buzzer drive circuit on the module, which can emit a sound directly to a fixed level.
(2) Power supply module The
power supply module adopts linear power supply and switching power supply. Chips such as single-chip microcomputers use linear power supply, which can effectively reduce program runaway caused by power interference. High-power devices such as motors are powered by switching power supplies to ensure that sufficient power is provided. The power supply adopts the leakage protection switch as the main control, which is safe and reliable. The low-voltage electricity is controlled separately with the boat-shaped switch, and the mains and low-voltage electricity are controlled separately. The module has three groups of independent low-voltage power supplies, of which two groups are positive and negative dual power outputs. An AC220 output board is placed on the panel, and three instruments can be connected at the same time. Each power supply has a fuse for overload protection.
(3) The emulator module is
equipped with a high-performance single-chip simulator, which can simulate MCS51 series single-chip microcomputers with full functions, and can also simulate software; the software is independently developed by China, which can well support Chinese, support keyword prompts, and automatically complete symbol matching. Features. Supports 64K program address breakpoints, 64K source program effective line breakpoints and 64K temporary breakpoints, and the status of the internal registers of the microcontroller is clear at a glance. The host computer and the computer adopt the popular USB interface.
(3) Display module
This module is included from the basic display element LED light-emitting diodes to advanced LCD display screens. The specific configuration is 8-bit marquee (logic level indication), 8-bit digital tube dynamic display, 16×32 dot matrix LED screen, 1602 character LCD screen, 128×64 drawing LCD screen. The display devices commonly used in the single-chip microcomputer are all included, so that the learner can access all the display schemes, and can be handy when designing the man-machine interface.
(4) Relay module The
relay is a commonly used actuator and a commonly used isolation component. It can use low voltage to control high voltage circuits and remotely switch the status of strong current circuits. At the same time, its actuator is a coil, which is used when power is turned on and off. Will produce electromagnetic interference. For this reason, the relay module adds optoelectronic isolation measures on the basis of the integrated drive circuit. The module has a total of 6 relays, and the switch contacts of each relay are all led out and clearly marked; each relay is also equipped with a working indicator, which makes it clear when the relay is energized. Two of the six groups of relays are AC220-controlled relays, which can control the forward, reverse and stop of the AC motor, and can be connected to electronic wires through the conversion head. The other four groups are output for electronic connection sockets. The relay contact capacity is 250V/6A, DC28V/12A
(5) Instruction module
The input components commonly used by single-chip microcomputers are placed on the instruction module. Among them, there are 8 independent keyboard interfaces, 8 8-bit switch inputs, and 4 rectangular keyboard interfaces. Meet the students' practical training requirements from basic to advanced, from simple to complex. If the user needs more buttons or a more complex design, you can use the PS2 keyboard and mouse interface of this module for expansion.
(7) ADC/DAC module
Two conversion chips ADC0809 and DAC0832 are designed on the ADC/DAC module. In order to facilitate debugging of programs and hardware, three functional sub-modules are onboard: 0-5V analog voltage output, 8-level LED level indicator and active clock generator. The ADC0809 experiment can use an active clock generator as the chip clock, 0-5V analog voltage output can be used as the analog quantity, and the 8-level LED level indicator can be used as an indicator of the analog quantity; in the DAC0832 experiment, the chip’s The output is connected to the 8-level LED level indicator, and it is clear at a glance whether the conversion result is normal.
(8) AC and DC motor control module
This module can complete the control experiment of two kinds of motors, namely 24V DC geared motor and 220V AC geared motor. A photoelectric switch counter is placed under the turntable of each motor, and the single-chip microcomputer can be used to sense its position and how many revolutions it has rotated. Each motor control circuit is equipped with an over-travel protection input port, which can effectively protect the safety of the motor and mechanism when it is combined with the horizontal moving device for experiments.
(9) Stepper motor control module
This module is equipped with a 24V two-phase stepper motor and high-power stepper motor driver. The module changes the motor's axis-rotation operation mode and adopts a horizontal movement mechanism, which can change the motor's axis rotation to horizontal linear motion, and is indicated by the scale of an aluminum ruler. This module can also be used as a closed-loop control experimental project, because the motion mechanism is equipped with a closed-loop element that senses distance. At the same time, an over-travel protection circuit is designed. When the mechanism reaches a program-unknowable state, the motor power supply can be automatically turned off to avoid damage to the mechanism over-travel. The linear motion mechanism is equipped with left and right limit output terminals for the single-chip microcomputer to query the status.
(10) Sensor matching module (4 sensor interfaces) The
sensor matching module is a circuit unit designed for sensor matching and electrical isolation. The unit has two groups of 16 optically isolated IO ports, each of which is optically isolated The IO port can imitate PLC and connect with 24V power supply sensor. And equipped with four-way sensor conversion interface for the connection of industrial sensors.
(11) Expansion module
Because the control method of 82C55 still has learning value, it is still present in many textbooks. The expansion module can meet the needs of experiments; all three ports of 82C55 are led out, which can be connected by electronic wire or cable. . The control terminal and the data communication port are arranged together, and the overall layout is beautiful and generous. There is also a 74LS245 chip, which can be used to combine with 82C55 to complete different experimental functions.
(12) Temperature sensor module
This module is equipped with two chip-type temperature sensors: digital temperature sensor 18B20 and analog temperature sensor LM35. The LM35 device is also equipped with an operational amplifier, and the amplified analog quantity can improve the measurement accuracy. Each sensor has a transparent shell reinforced protection, there are high-power heating resistors, heating indicators and so on. The working status is clear. It can be used for constant temperature control, thermostat and other experiments.
4. Equipment training project The
single-chip microcomputer control function training and assessment device is used for teaching. It can plan teaching activities according to the work process-oriented and work-study mode, and complete the following tasks:
MCU part
1. Marquee experiment
2. Independent key input experiment
3. Matrix keyboard interface training
4. Photocoupler isolation input and output experiment
5. Metal detection training
6. Relay isolation control experiment
7. Static digital tube display experiment
8. Dynamic digital tube display experiment
9. Buzzer performance experiment
10.8255 chip expansion IO Port experiment
11. LCD module control training
12. Dot matrix LED screen Chinese character display experiment
13. AD conversion experiment
14. DA conversion experiment
15. LM35 temperature sensor acquisition experiment
16. IIC bus IC card storage experiment
17. EEPROM chip 24 series storage experiment
18. External interrupt photoelectric counting control motor training
19. Timer interrupt control motor training
20. Open loop stepper motor control training
21. Closed loop AC and DC motor system experiment
22. Closed loop stepping Motor system experiment
23. Constant temperature room control system experiment
24. PS keyboard communication experiment
25. RS232 communication experiment
V. Configuration list