Recently, we conducted an experiment to explore the relationship between the current of a photoresistor and light intensity. The photoresistor and a voltage divider resistor were connected in series, powered by the 5V output of the ESP32. We used pin IO33 to collect the voltage across the voltage divider resistor and calculated the current through … 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
Experiment Scenario 1 Introduction Recently, I have been deeply studying the “Do It Yourself” experiments in the new textbook on “Electromagnetic Induction” to explore the relationship between the drop height of a magnet and the maximum induced current in a coil. The first time I used the maximum reading of a DC ammeter to represent … Read more
On the eve of the Lunar New Year, the microcontroller enthusiast explored the relationship between capacitor charge and voltage using the ESP32 and Phyphox, obtaining a graph of the relationship between capacitor charge and voltage, with satisfactory experimental results. The source code for the capacitor charging and discharging experiment, previously created, was burned into the … Read more
On November 15, 2020, Sunday, the micro-master used Phyphox and ESP32 Bluetooth to conduct a coil self-induction experiment again, achieving satisfactory results. Early Experiments In previous experiments, due to the small self-inductance coefficient of the coil and the relatively large sampling resistance, the resulting image of the coil’s self-induction current was not ideal. Recently, the … 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
Using Phyphox, Bluetooth, and ESP32, many circuit experiments have been conducted, but they have been limited to the realm of direct current because the development board cannot directly collect alternating current signals. Previously, experiments on Lenz’s law were conducted using Phyphox, Bluetooth, and ESP32 by first preloading a constant direct current in the coil, and … Read more
Recently, I used the ESP32 and Phyphox to depict the capacitor’s charging current image and discovered a strange flat top phenomenon in the current image. This flat top phenomenon does not match the shape of the charging current image in practice, making it difficult to provide a reasonable explanation to the students. This issue must … Read more
Recently, the Micro Master has been dedicated to conducting innovative experimental research using Phyphox and ESP32 Bluetooth, accumulating a lot of experience while also facing numerous challenges. On October 7, 2020, I sought help at the Clockwise Rubik’s Cube Club led by expert Li Lu from the Maker Education Teacher Studio in Jiaozuo City. I … Read more
Electronic Scale Product Since July 2021, after about two months of intermittent efforts, the author has finally completed the installation and debugging of the smartphone electronic scale, which can measure up to 10 kilograms. During the long installation and debugging process, two technical articles from the WeChat public account “A Xuan Physics Teaching Research Room” … Read more