Key features of the platform:
1. Studying the basics programming of microcontrollers.
The laboratory practicum on programming microcontrollers includes the following stages of training:
- studying the theory about basic programming of microcontrollers;
- studying the circuits for connecting peripheral devices to microcontrollers;
- studying the principles of programming the peripheral devices, writing a program in the programming environment of microcontroller.
The stand allows to connect the following types of microcontrollers as separate modules:
- ATmega 2561 or its analogue Atmega 128;
- INTEL N8052AH or AT89S52.
The training laboratory equipment includes the following standard set of peripheral units:
- discrete sensor module (toggle switches, 8 pcs.);
- analogue sensor module (potentiometers, 2 pcs.);
- seven-segment display module;
- LCD module;
- module of OLED-display with interface
- linear indication module;
- keyboard module;
- RS-485 serial interface module;
- I2C, SPI serial interface module;
- universal USB-connector to connect the module of the microcontroller under study. There are also built-in programmers for each type of microcontroller.
2. Studying the operating principles, programming and tacking characteristics from sensors and executive devices.
NTC-02.30 gives the ability to study devices and mechanisms of the modules as follows:
- temperature sensor module (NTC-, PTC-sensor, thermocouple, electronic temperature probe DS18B20);
- environmental parameters measurement module (humidity sensor, air pressure sensor, air flow sensor);
- module of optoelectronic devices (photoresistor, photodiode, phototransistor, varistor);
- resistive module (film and wire potentiometer, rheostat);
- module of sound radiator and microphone;
- module of quadrature sensor;
- speed sensor module (optical, inductive, Hall sensor, tachogenerator);
The following executive units are used for studying sensors:
- solenoid valve;
- light source;
- air pump.
It is organized an electronic timer with indication, time management of executive units.
The studied sensors and actuators (sound radiator, microphone, quadrature sensor, humidity sensor, pressure sensor and air flow sensor, final control relay) give the ability to connect to the outputs of the microcontrollers, which make it possible to program them (for example, controlling, displaying the sensors’ parameters, working out to the set values, etc.).
The input / output signals of the sensors can be examined using the built-in dual-channel oscilloscope. There is a digital system for measuring electrical parameters (current, voltage), which will make it possible to construct the characteristics of some of the studied sensors.
3. Studying the control systems elements by electric drives:
3.1 Module for PWM control of a DC motor. Allows to study the programming of (setting of PID-controller coefficients):
- open-loop DC motor control system;
- closed-loop control system (with feedback on current and speed);
- follow-up DC motor control system (with positional feedback by resistive position transducer);
3.2 Stepper motor control module (SM). It allows to study the operating principle, programming and driver control of a stepper motor, as well as the organization of a tracking system based on the motor stepper motor.
4. Studying the circuitry amplifiers and measuring instruments.
4.1 Studying the Wheatstone’s measuring bridge. Types of resistors’ connection, automatic calculation of the lookup value of the resistor;
4.2 Studying operational amplifiers (OA):
- studying the OA-based inverting amplifier circuit;
- studying the OA-based non-inverting amplifier circuit;
- studying the repeater circuit based on OA;
- studying the circuit of comparator on OA;
- studying the circuit of adder on OA;
- studying the circuit integrator on OA;
- studying the differentiating circuit on OA.
- studying the F/U and U/F converters;
- studying the V/I and I/V converters.
4.3 Studying the filters of low and high frequency:
- studying the adjustable active filter of low frequency;
- studying the adjustable active filter of high frequency.
- studying the active band-pass filter.
4.4 The study of the automatic control system on the OA with feedback:
- the study of circuitry P-controller;
- study of the circuitry of the PI controller;
- study of the PID controller circuitry.
On the training platform there are following build-in units:
- own necessary power sources;
- equipment for creating a real environment of the studied sensors;
- digital measurement system (current, voltage);
- two-channel oscilloscope with the necessary measurement ranges;
- function generator.
The training laboratory equipment is supplied with:
- a set of methodical and technical documentation for teaching staff;
- software, which allows to:
– fix the received data on the studied devices,
– generate a report on the laboratory work.
Software development is performed in MPlab software (for dsPIC microcontrollers) and AtmelSTUDIO software (for AVR microcontrollers). Ready-made software solutions are also included with the stand. Thus, you can immediately begin to study the instruments, sensors and devices you are interested in, in accordance with the guidelines.