Modern physics teaching is facing new challenges. Physics is among the key STEM fields that are becoming increasingly important in the context of modern occupations and needs in everyday life. Within the framework of the existing curriculum, the question arises about the methods that would make students more interested in physics and introduce them to different aspects of the scientific method and lead them many times through the research process. A physical experiment is something that cannot be replaced by digital content because it provides a real, interactive and exploratory insight into natural phenomena and processes. The fundamental role of the microcomputer in teaching physics is the construction of a measuring instrument. Numerous available external sensors open possibilities for the construction of measuring instruments. The point is not for the student to receive a complex measuring instrument, but to construct it independently by connecting the necessary components to a microcomputer and refining the measurement program. Using the example of the Arduino platform, we will show that this approach can be introduced quickly into the teaching process.