In embedded development, many students encounter signal integrity issues. If the signal is not complete, it can lead to data loss, errors, and even problems with system performance and reliability. So how can we ensure signal integrity in PCB development? 01Reasonable Layout Planning Functional Partitioning Dividing the circuit board into functional zones is the foundation … Read more
Question: Can you explain why the board surface turns white after wave cleaning? After using a hot air gun, the whitened areas return to normal! Liao Xiaobo: This whitening of the board surface is mostly due to residual flux that has not been thoroughly cleaned, which appears when it absorbs moisture. Baking or using a … Read more
The significance of impedance for PCB circuit boards is crucial. Why is impedance necessary for PCB circuit boards? This article first introduces what impedance is and its types, then explains why PCB circuit boards need impedance, and finally elaborates on the importance of impedance for PCB circuit boards. Let’s follow along to learn more.01 What … Read more
Produced by 21ic Forum Xiao Ye San Qian Website: bbs.21ic.com We usually use adjustable power supplies, which typically display two values: the current voltage set and the current flowing through the device. Below, I will introduce how to make a meter that can display both voltage and current values using the INA226 power chip. 1. … Read more
In surface mount technology (SMT), internal voids in solder joints are one of the main defects affecting the reliability of electronic components. Voids can weaken the mechanical strength, conductivity, and thermal conductivity of solder joints, which may lead to catastrophic failures, especially in high-reliability fields such as automotive electronics and aerospace. This article systematically analyzes … Read more
Metal core multilayer printed circuit boards, as the name suggests, are multilayer boards with an embedded0.1mm~1.5mm thick metal core (such as Cu,Al,Cu-Invar-Cu etc.), widely used inLED lighting, high-performance computing, automotive electronics, and other fields. Metal core multilayer boards have the following specific functions: l High Power Heat Dissipation The core components of ordinary printed circuit … Read more
Click the blue text to follow us In modern electronic devices, PCB (Printed Circuit Board) is one of the core components, and its performance directly affects the stability of device operation.However, PCBs may be damaged during manufacturing, transportation, or use, so timely detection and diagnosis of PCB damage is crucial.Here are several common detection methods: … Read more
Today, electronic products generally require certification, one of which is EMC testing.EMC includes radiation testing, and to prevent radiation interference, shielding covers are often used.When asking a factory to make a shielding cover, you cannot provide them with the PCB files, so it’s best to prepare a simple dimension drawing for them. How do we … Read more
Conformal coatings were originally applied only in high-tech fields of printed circuit boards (automotive industry, aerospace, and maritime). As electronic devices are increasingly used in daily life, consumers are also paying more attention to product quality and reliability. The use of conformal coatings allows manufacturers to effectively improve product quality, and thus they are now … Read more
1. Types of PCBs According to the number of circuit layers, PCBs can be classified into single-sided boards, double-sided boards, and multi-layer boards. Common multi-layer boards typically have 4 or 6 layers, while complex multi-layer boards can have dozens of layers. The following are the three main types of PCBs: 1. Single-Sided Boards Single-sided boards … Read more