The article describes the implementation of IoT technology in the teaching of microprocessor technology. The method presented in the article combines the reality and virtualization of the microprocessor technology laboratory. A created IoT monitoring device monitors the students’ microcontroller pins and sends the data to the server to which the teacher is connected via the control application. The teacher has the opportunity to monitor the development of tasks and student code of the program, where the functionality of these tasks can be verified. Thanks to the IoT remote laboratory implementation, students’ tasks during the lesson were improved. As many as 53% (n = 8) of those students who could improve their results achieved an improvement of one or up to two tasks during class. Before the IoT remote laboratory application, up to 30% (n = 6) of students could not solve any task and only 25% (n = 5) solved two tasks (full number of tasks) during the class. Before implementation, 45% (n = 9) solved one problem. After applying the IoT remote laboratory, these numbers increased significantly and up to 50% (n = 10) of students solved the full number of tasks. In contrast, only 10% (n = 2) of students did not solve any task.

The letter deals with the methodology for determining the optimal number of phases of a multi‐phase DC to DC buck converter from the point of view of its maximum efficiency. It also analyses the impact of individual parameters of the converter and the used components on the number of these phases.

Parallel data processing is a fast data manipulation. Input data are processed by multiple devices due to speed and job allocation for individual devices. This paper describes using of parallel processing input values by two microcontroller STM32F446RE and microcontroller STM32F746ZG which is presented as a master device. The other microcontrollers are slaves. This device processing input logic status from 32 input buttons that makes 32-bit word. There is master/slave architecture, where slaves scan the pins and send the status to the master device. The primary advantage of parallel processing is dividing of tasks between two or more processors and it means that each processor can operates independently with a smaller number of operations. This advantage does not burden the processor such as if only one processor operates. As result it was created equipment for educational purposes to train specialists in the field of data processing.

The article describes the principles based on which it is possible to obtain energy from renewable sources more efficiently. The principles use the conventional DC-DC interleaved buck converter based on the common electronic component types and the control strategy. A novelty of such a proposed solution lies in the methods which are not new, but with the right combination, better results can be achieved. The resulting method can be implemented into various topologies where the highest efficiency for wide input power is required. In case of the renewable energy sources where the power can vary hugely during the day, the proposed method can be implemented. Therefore, the article provides several steps, from calculation through simulation to experimental results that brings reader close to understanding of a such proposed solution.

IoT technology is gaining more and more popularity in practice, as it collects, processes, evaluates and stores important measured data. The IoT is used every day in the work, in the home or smart houses or in public areas. It realizes the connectivity between real world and digital world which means, that it converts physical quantities of the real world in the form of analog signals into digital numbers stored in clauds. It is essential that students gain practical experience in the design and implementation of the IoT systems during their studies. The article first describes IoT issues and communication protocols used in IoT generally are closer described. Then the design and implementation of an educational model of IoT system - Weather station with the ThingSpeak cloud support is described. The created IoT model interconnects microcontroller programming, sensors and measuring, cloud API interfaces, MATLAB scripts which are useful to analyses the stored data, Windows and Android application developing.

The paper deals with issue of parallel connection of more DC/DC converters. The article contains theoretical overview of one group of methods designed for proper functioning of parallel connected converters. The main advantage of referred methods is their simplicity. In some cases they fully satisfy requirements and they can be used for correct functioning of parallel power stages. Following part is dedicated to analysis of the one method by computer simulations. Analyzed method with current feedback has proved to be operational. Current-sharing can be ensured if current reference value is set at correct value for certain load. The results of the simulation showed that for 5Ω load and 20V of required output voltage is the 1A of reference current value just right. But when output resistive is increased, reference current value should be set more tightly (at the lower value). However then it can cause fall of the output voltage. It is why the droop methods increase current-sharing abilities, but makes worse output voltage regulation.