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Fault characteristics and maintenance of circuit board capacitor damage
First, a small trick for multimeter testing SMT components Some SMD components are very small and inconvenient to test and repair with ordinary multimeter pens. One is that it is easy to cause a short circuit, and the other is that it is inconvenient for the circuit board coated with an insulatin...Read more -
Remember these repair tricks, you can fix 99% of PCB failures
Failures caused by capacitor damage are the highest in electronic equipment, and damage to electrolytic capacitors is the most common. The performance of capacitor damage is as follows: 1. Capacity becomes smaller; 2. Complete loss of capacity; 3. Leakage; 4. Short circuit. Capacitors play...Read more -
Purification solutions that the electroplating industry must know
Why purify? 1. During the use of electroplating solution, organic by-products continue to accumulate 2. TOC (Total Organic Pollution Value) continues to rise, which will lead to an increase in the amount of electroplating brightener and leveling agent added 3. Defects in the electroplated ...Read more -
Copper foil prices are rising, and expansion has become a consensus in the PCB industry
Domestic high-frequency and high-speed copper clad laminate production capacity is insufficient. The copper foil industry is a capital, technology, and talent-intensive industry with high barriers to entry. According to different downstream applications, copper foil products can be divided...Read more -
What are the design skills of op amp circuit PCB?
Printed circuit board (PCB) wiring plays a key role in high-speed circuits, but it is often one of the last steps in the circuit design process. There are many problems with high-speed PCB wiring, and a lot of literature has been written on this topic. This article mainly discusses the wiring of ...Read more -
You can judge the PCB surface process by looking at the color
here is gold and copper in the circuit boards of mobile phones and computers. Therefore, the recycling price of used circuit boards can reach more than 30 yuan per kilogram. It is much more expensive than selling waste paper, glass bottles, and scrap iron. From the outside, the outer layer of the...Read more -
The basic relationship between layout and PCB 2
Due to the switching characteristics of the switching power supply, it is easy to cause the switching power supply to produce great electromagnetic compatibility interference. As a power supply engineer, electromagnetic compatibility engineer, or a PCB layout engineer, you must understand the cau...Read more -
There are as many as 29 basic relationships between layout and PCB!
Due to the switching characteristics of the switching power supply, it is easy to cause the switching power supply to produce great electromagnetic compatibility interference. As a power supply engineer, electromagnetic compatibility engineer, or a PCB layout engineer, you must understand the cau...Read more -
How many kinds of circuit board PCB can be divided according to material? Where are they used?
The mainstream PCB material classification mainly includes the following: bai uses FR-4 (glass fiber cloth base), CEM-1/3 (glass fiber and paper composite substrate), FR-1 (paper-based copper clad laminate), metal base Copper clad laminates (mainly aluminum-based, a few are iron-based) are the mo...Read more -
Grid copper or solid copper? This is a PCB problem worth thinking about!
What is copper? The so-called copper pour is to use the unused space on the circuit board as a reference surface and then fill it with solid copper. These copper areas are also called copper filling. The significance of copper coating is to reduce the impedance of the ground wire and impro...Read more -
Sometimes there are many benefits to PCB copper plating on the bottom
In the PCB design process, some engineers do not want to lay copper on the entire surface of the bottom layer in order to save time. Is this correct? Does the PCB have to be copper plated? First of all, we need to be clear: the bottom copper plating is beneficial and necessary for the PCB, but ...Read more -
Four basic characteristics of PCB RF circuit
Here, the four basic characteristics of radio frequency circuits will be interpreted from four aspects: radio frequency interface, small desired signal, large interference signal, and adjacent channel interference, and the important factors that need special attention in the PCB design process ar...Read more
