Real-time data acquisition with ESP32: a didactic approach to Faraday’s law

Abstract This paper presents a study of Faraday’s law of induction, using an experimental apparatus based on the ESP32 microcontroller, adopting a practical and pedagogical approach. The setup enables real-time acquisition and both qualitative and quantitative analysis of the behaviours of current, magnetic field, and induced voltage. This enables clear visualization of how the induced voltage is related to the temporal variation of the magnetic field, as described by Faraday’s law. The methodology facilitates the understanding of concepts that are often regarded as abstract and difficult for students to grasp, making them more accessible and intuitive. The integration of the experiment with Excel, employing PLX-DAQ software, provides a customized tool for this application, enabling streamlined data acquisition and analysis. The promising results obtained in this study highlight the potential of using microcontrollers as a valuable pedagogical resource in physics education, capable of fostering more active learning by linking theoretical principles with practical applications.