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
1. Background Last time, the Bluetooth discussion was quite rushed. This time, I am determined to clarify the fundamental knowledge and applications of Bluetooth. 1.1 Reference Materials Overview of Bluetooth Version Development http://blog.sina.com.cn/s/blog_d2db96110102xnj6.html In-depth Understanding of Low Energy Bluetooth (BLE) Protocol Stack https://blog.csdn.net/shunfa888/article/details/80140475 BLE Protocol Series (1) Introduction to Bluetooth https://blog.csdn.net/zwc1725/article/details/80703326 2. Basic Knowledge of … Read more
Click the Blue Text | Follow Us DOI：10.3969/j.issn.1671-7775.2024.04.008 Open Science (Resource Service) Identifier (OSID)： Citation Format：Gao Xiangshang, Yang Weidong, Shen Erbo. A Grain Moisture Detection Method Based on ESP32-CSI[J]. Journal of Jiangsu University (Natural Science Edition), 2024, 45(4): 426-433. Funding Project：Henan Provincial Natural Science Outstanding Youth Fund Project (222300420004); National Natural Science Foundation Project (62172141, … Read more
I touched inside a cabinet and found a C3 chip. However, whether you read this article or not is up to you. This is a comparison with the first generation ESP32. A comparison of several generations, but there is no PSRAM expansion. At the end of 2020, Espressif launched the secure, low-power, low-cost RISC-V MCU … Read more