E.V. Naidenov - Post-Graduate Student, Assistant, Department of Electronics and Microprocessor Technology, Smolensk Branch of the National Research University Moscow Power Engineering Institute. E-mail: nzettez@gmail.com L.L. Ljamets - Ph.D. (Eng.), Department of Electronics and Microprocessor Technology, Smolensk Branch of the National Research University Moscow Power Engineering Institute. E-mail: lll190965@yandex.ru