DIY Speaker Soldering Path Hands-on Skills Logical Thinking What We Are Doing By using a soldering pen, solder wire, and various components we perform soldering on the integrated circuit board to complete the circuit connections and check the circuit continuity using crocodile clips with positive and negative terminals Life is a Challenge Continuously trying new … Read more
[OSP (Organic Solderability Preservative) is a chemical method that grows a layer of organic copper complex compound on the surface of copper. This organic film can protect the clean bare copper on the circuit board from rusting (sulfidation or oxidation) in normal storage environments by preventing contact with air, and it can be easily removed … Read more
Author: Xiaoyu, Typesetting: Xiaoyu WeChat Official Account: Chip Home (ID: chiphome-dy) 01 Exposing Wires Inside the Chip Package We received a chip, and the core part of the chip is actually not as large as the chip itself. To facilitate the connection of numerous pins, an additional layer of packaging is added outside. Common types … Read more
01 Identifying the ProblemI have a STM32F407G-DISC1 development board, with the MCU being STM32F407VGT6. Recently, I needed to use this board for a test, but it turned out to be non-functional. After sitting idle for a long time, it was prone to failure.I conducted some troubleshooting, first checking that there were no short circuits between … Read more
Compared to single-sided and double-sided boards, the process flow of rigid multilayer printed circuit boards is fraught with challenges, with significantly increased difficulty, mainly reflected in the following aspects: 1.Inter-layer alignment of multilayer wiring 2.Alignment of holes with inner layer patterns 3.Step slot formation 4.Warping of the board surface 5.Defects such as internal delamination, bubbling, … Read more
A few years ago, I planned to use a Raspberry Pi to build a small robot, but when I actually started working on it, I found that using someone else’s designed board was not very convenient. On one hand, the Raspberry Pi is designed for a wide range of users, which limits customization; the shape, … Read more