1 Introduction Recently, during the joint examination, there was a question about measuring the electromotive force (EMF) and internal resistance of a power source using the voltage-resistance method. Considering the authenticity of this experimental background, we validated the experiment using ESP32 and Phyphox. 2 Question Review and Reference Analysis 3 Experimental Validation In this validation … Read more
Recently, I was inspired by the quality lesson activities conducted by the city’s backbone teachers at the school. During the listening and evaluation session, I managed to use Phyphox and ESP32 to jointly capture the current change images produced by the rotation of a small motor’s rotor, which was quite exciting. After building the experimental … Read more
Overall View of the Device Last time, when detecting the current changes before and after the rotor of the small motor got stuck using ESP32, the induced electromotive force when the small motor was driven by an external force was measured. However, the changes in electromotive force were too drastic, and the data jumps were … Read more