Recently, the microcontroller enthusiast conducted an experiment to plot the I-V characteristics of a conductor, aimed at learning how to use Bluetooth dual-channel data transmission. In this experiment, the voltage data transmitted via Bluetooth channel 1 is assigned to the x-axis, while the voltage data from Bluetooth channel 2 is assigned to the y-axis, thereby … Read more
Recently, the micro-master utilized Phyphox and ESP32 Bluetooth to explore the relationship between capacitor voltage and charge, achieving quite ideal results. Early Research Axuan Teaching Research Room “Division Method” experiment introducing the concept of capacitance Maker Jiaozuo Using the half-division method to explore the relationship between capacitor voltage and charge Essentially, it involves first charging … Read more
Enable the multi-core functionality of the ESP32 to execute tasks in parallel while setting the chip’s clock frequency and the FreeRTOS real-time system. The effect achieved in this article is shown in the GIF, where two displays execute in parallel, each using one of the ESP32’s two cores. The display of the two screens, if … Read more
1 Introduction Recently, I have been troubled by various trivial matters, and my mind has been restless. Seeing that members of the “Phyphox Bluetooth Experiment Development Group” WeChat group are releasing new works every day, I was also eager to try. Following the example of Teacher Mei from Beijing, I conducted an experiment to “plot … Read more
01 Install Thonny Software 1. Problem/Goal How to install the MicroPython development integrated environment? Below is a detailed installation guide for the software, and basic testing instructions can be found on the Thonny official website. 2. Basic Principles One commonly used development environment software for MicroPython is Thonny, an open-source software developed by the University … Read more
Recently, the microcontroller enthusiast has been using Phyphox and ESP32 Bluetooth to redraw the I-V characteristics of a light bulb, continuously changing the experimental parameters in hopes of finding the optimal settings. In one experiment, the enthusiast set the sampling frequency of the ESP32 to 100Hz and slowly adjusted the voltage across the light bulb … Read more
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