1. Introduction Previously, we tested the input voltage characteristics of the ports in the STC32C030 microcontroller. A signal source DG1062 was used to generate a peak 10V sine AC signal. It can be observed that the voltage at the microcontroller’s IO port is limited to around 9V. So what are the specific characteristics of the … 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
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
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
Due to certain models of eMMC from a specific brand【such as: H26M62002JPR, H26M51002KPR, etc.】 requiring 1.8V for read and write operations, improvements must be made for these chips in the original V2.3 and lower versions: 1. A 3.3V to 1.8V LDO, package: SOT-23 2. Two 1uF-4.7uF surface mount capacitors, package: 0603 The installation effect is … Read more
Overview of the EMMC Protocol Whether it’s EMMC V4.5 or V5.1, the protocol can seem overwhelming for newcomers who may struggle to grasp the key points or analyze it properly. This article summarizes some important and commonly used aspects of the EMMC protocol. 1. Basic Understanding of EMMC 1.1 Physical Connections: Card Concept (eMMC) image-20220215110840519 … Read more
01 UART Outputting Analog Signals 1. Introduction Yesterday, someone commented on the “Serial Music” VLOG, raising a very good question. That is, what are the advantages of using the microcontroller’s UART output signal low-pass filtered to obtain an analog signal compared to using traditional PWM output signal low-pass filtered to obtain an analog signal? In … Read more