The results obtained in the field of analysis and development of controllers for the charge of a solar power plant are presented. A description of the charge controllers of the solar panel (SP) is given and a scheme of a solar installation with their use is proposed. The maximum power point (MPP) of a polycrystalline silicon solar battery (SB) was calculated. The Pascal software for the research and analysis of charge controllers, which can be used for various types of SPs, including perovskite panels, is proposed. It is shown that the type of controller which tracks the MPP has better characteristics as it provides a higher charge.

A study of the application of a graphene-based cooling system for a personal electronic computer (PC) is presented. The features of using monocrystalline and polycrystalline graphene in practice are analyzed. A comparison is made with the materials currently used in the cooling systems of a PC. The heat flux densities are calculated as a function of the temperature between the copper plate and the water adsorbate and between the two layers of polycrystalline graphene and water adsorbate. The prospects for the use of graphene in cooling systems of PCs are outlined.

The data transfer rate which in the near future will be provided by the 5G standard will allow to combine thousands of drones (unmanned aerial vehicles, UAV) in real time into a common network, capable of tracking any situation in the territory of a large metropolis (within the SmartCity project). The large number of UAVs which are in continuous operation in the airspace will lead to a situation where a variety of adverse climatic factors (high humidity, sudden gusts of wind, lightning minutes, electromagnetic fields, electron-ion irradiation, infrared heating, electrostatic discharge, corona discharge in the atmosphere, etc.) will influence on these UAVs. This can lead to systematic failure of this type of device which will lead to additional costs and deterioration of the quality of the system in general. Implementation in the drone-construction some systems similar to systems for protecting aircraft from lightning strikes (for example, the Faraday grille in the body) will lead to a significant increase in the costs of devices. Therefore, a develop proposals for measures to protect drones from such an impact, at the present stage of development, the diagnostic and prediction of the thermo-mechanical and strength characteristics of the component base of control systems of unmanned vehicles of a “smart city” using 5G technology when exposed to external electrical effects of considerable amplitude is of practical value.

The graphical dependences of the spectral power distribution of a laser lighting device are analyzed. The data on the luminous flux of these systems are presented. Prospects for optimizing the spectrum of low-power laser illuminators are outlined. The spectra were studied using a modernized spectrometer. It has been shown that the optimization of the spectrometer design makes it possible to adjust and calibrate the spectrometer to obtain more accurate spectral values.

In this paper, the use of electric start-up systems with high-voltage current supply sources designed to start an internal combustion engine is encouraged.

A brief description is given of phosphors from various manufacturers that can be used in lighting devices with laser injection in the range of 400–480 nm. An estimate of their energy output and inertia is given. The necessity of studying various types of luminescence to optimize the characteristics of phosphor lighting devices is described. It is known that the optical characteristics of laser lighting devices depend on the quality of the phosphor. However, at the moment there are no well-established methods for studying phosphors for compliance with the requirements for brightness, luminous flux, and thermal degradation. One of these methods can be microscopy, which allows you to study the microstructure of samples. The paper considers a method for determining the geometric and optical parameters of individual phosphor particles used for laser lighting devices using microscopy. On the example of a fine suspension of phosphors, images were obtained and some optical parameters of individual particles with diameters from 40 to 150 nm were determined. The conducted studies demonstrate the high resolution of the microscopy method, which can be used to visualize phosphor particles.