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, while studying the relationship between the resistance of a thermistor and temperature using Phyphox and ESP32 Bluetooth, the author needed to plot the relationship between the thermistor resistance and time. By pinching or releasing the thermistor, they observed changes in the resistance-time graph, thus understanding the effect of temperature on the thermistor. The thermistor … Read more
Recently, inspired by a high school physics exam experiment question, I decided to use the voltage-resistance method to measure the electromotive force (EMF) and internal resistance of a dry battery. A few days ago, I used the ESP32 and Phyphox to measure the EMF and internal resistance of a simulated power supply using the voltage-resistance … Read more