At present, programmable logic integrated circuits (FPGAs) are increasingly used in the development of robotic systems. A significant advantage of FPGAs is their versatility and the ability to quickly program to perform the functions of almost any digital device of a robotic system. FPGA is a semi-finished product, on the basis of which a developer with a personal computer has the ability to design a digital device in record time. This is provided by simple and relatively inexpensive software hardware and special software called computer-aided design (CAD). FPGA is an electronic component used to create digital integrated circuits. Unlike conventional digital chips, the logic of FPGA operation is set by programming using special tools: programmers and software. FPGA programming is performed using the description languages Verilog HDL and VHDL. At the upper level, these languages are very similar - the hardware model is described in the form of interacting blocks (modules) and for each of them is defined interface and implementation. Module interfaces describe the input, output, and two-way ports through which modules connect to each other for data exchange as well as control signals. The implementation sets the elements of the internal state and the order of calculating the values of the output interfaces based on this state and the values of the input ports, as well as the rules for updating the internal state. The article reveals the stages of designing digital devices of robotic systems using FPGA, considers the principles of construction and operation of the main nodes of combinational circuits, logical elements implemented one of the specified functions, which is subsequently programmed on FPGA using CAD Quartus Prime with built-in simulators Models.