The article presents an approach for software development for the management of an assembly line. Basic software tools and hardware solutions that are needed for the development of the software are described. Design of specific software for the management of an assembly line for bottling liquid food products is presented. A specially developed algorithm for the management of the assembly line is described. The realization of the management of the assembly line in the programming environment Simatic Manager Step 7 and the developed user interface in the graphical environment Simatic WinCC Flexible are also presented. The design of software for the management of an assembly line for bottling liquid food products is extremely important for the development of automated manufacturing in Bulgaria. After detailed testing of a trial version of this software, it will be used in Bulgarian company for the management of an assembly line for bottling liquid food products. The developed software is an open system that can be continuously updated and improved. This software is applicable in all manufacturing plants for bottling liquid products from canning, pharmaceutical, cosmetic industries and many others.

In thе article are presented possibilities of computer modeling and simulations of logic circuits using the software CircuitMaker. CirciutMaker is one of the widely used software product for quick and easy synthesis and simulating the work of the various electronic circuits. By using CirciutMaker are created logical elements and synthesized logic circuits such as decoders, multiplexers, counters, programmable logic device, etc., that allow conducting computer simulations and experiments to solve specific experimental tasks. The work of the shown circuits is illustrated with the time-impulse diagrams. The application of the software product CirciutMaker for students who study the course „Analysis and synthesis of logic circuits“ is also considered. The computer modeling and the simulations of logic circuits can be used in the lectures and in the laboratory exercises on the course „Analysis and synthesis of logic circuits“ to conduct computer (virtual) interactive experiments.