The publication contains a brief description of the package of programs MicroCAP-8 in relation to the modeling of operating elements and devices of the DCM. The manual is accompanied by a large number of examples illustrating ways of constructing and analyzing low- and medium-degree integration digital schemes. Designed for students studying in the specialties ''Computers, complexes, systems and networks'', ''Information systems in business''. It can also be used by students of other specialties studying the operating elements and devices of the CMM. Methodical guidelines prepared by the Department of Information and Network Technologies and recommended for publication by the editorial and publishing council of St. Petersburg State University of Aerospace Instrumentation