Figure 1 Experimental Scene Recently, the author has been using Phyphox and ESP32 to capture the current changes when a light bulb is turned on. However, the current change at the moment the light bulb is turned on is quite rapid, making it difficult to draw an ideal current change graph. WeChat Official Account “Physics … Read more
Introduction On the third day of the Lunar New Year, we built an experimental circuit on a breadboard to “plot the I-V characteristics of a diode in the conducting state.” A programmable resistor board was used as the internal resistance of the ammeter, a potentiometer was used as a variable resistor to control the circuit, … Read more
Experimental Scene 1 Introduction Since learning Bluetooth communication with ESP32 and Phyphox during the National Day holiday in 2020, the author has been eager to solve the visualization problem of the relationship between capacitor voltage and charge, attempting to derive the charge amount by integrating the charging current, and then depict the charge-voltage relationship graph. … Read more
Raspberry Pi: GOIP Previously used a USB SIM800-like communication module, operated the serial port with Python after connecting to the computer. Subsequently used Raspberry Pi/ESP32 as the main controller. The open-source asterisk can not only serve as a VoIP server but also bridge PSTN for making and receiving calls and SMS messages. The customized system … Read more
This article is an excellent article from the Kx forum, author ID: wx_莫克斯 Preparation USB Protocol Specifications l USB UARTl USB HIDl USB Memory The one at the top is the standard serial port implementation, which can connect to MCUs like STM32 or ESP8266 via USB. The middle one can be used for BadUSB (to … 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
A Favored MCU – ESP32 ESP32 integrates 2.4 GHz Wi-Fi and Bluetooth dual-mode, using TSMC’s ultra-low power 40nm process, suitable for various IoT application scenarios. 32-bit MCU & 2.4 GHz Wi-Fi & Bluetooth/Bluetooth LE Xtensa 32-bit LX6 single/dual-core processor, computing capability up to 600 MIPS 448 KB ROM 520 KB SRAM 16 KB RTC SRAM … Read more
1. Concept Introduction 1.1 What is the Boot Process of a Microcontroller? The boot process of a microcontroller refers to a series of initialization steps that occur from the moment power is applied or the device is reset until the user code begins execution. Different microcontrollers have specific details in their boot processes, but most … Read more
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