In this final thesis, the problem of controlling shortwave filters and antenna switches during amateur radio competitions was addressed. I decided to use an Arduino Nano microcontroller to create a device that would automatically switch filters depending on the frequency emitted by the FT-1000MP radio device. To achieve this goal, we used optocouplers and transistors as output elements. After developing a prototype on a protoboard and testing it, we proceeded to create a printed circuit board using the Fritzing program and the photolithography process. The external appearance of the device was placed in a practical box. This project encompassed many technical areas, including electronics, mechanical components, programming, and printed circuit board fabrication. The work is highly interesting and beneficial for radio amateurs, and it provided an opportunity to apply and refine various skills.