The reaction principle can be expressed by the equation of reaction of FeCl3 solution with metallic Cu: 2FeCl3 + Cu == 2FeCl2 + CuCl2; Although iron is more active than copper, it can replace metallic copper from copper sulfate solution, and it produces ferrous sulfate itself. However, ferric iron has stronger oxidation than divalent copper, [...]
Common mode Choke, also known as common mode choke. Performance characteristics: It has extremely high initial magnetic permeability, has large impedance and insertion loss under the earth's magnetic field, and has excellent suppression effect on interference, and exhibits resonance-free insertion loss characteristics in a wide frequency range. l High initial permeability: 5-20 times that of [...]
Circuit board maintenance is actually an experience. You want to quickly find fault points from dense components. Not only do you need extensive maintenance experience, but you also need to know the working principle of the board. The following small series are based on your own knowledge. Method Try to talk about how to quickly [...]
According to China's central radio and television voice "News Night" report, the three major operators will announce how much their 5G packages will be released on October 31st in November 1 5G commercial packaging officially opened 5G next week! Are you ready to change your phone and 5G 5G package? I have seen that the [...]
The electronic equipment must be interconnected according to the circuit schematic diagram to achieve the predetermined function. If the connection is wrong, the whole circuit board will be invalid. Therefore, the connection with the best compatibility of reliability, process and economy is an important part of the circuit board design. One. There are many ways [...]
Hole metallization process of circuit board The hole metallization process is one of the most critical processes in the manufacture of printed circuit boards. For this reason, it is necessary to carefully check the copper surface of the substrate and the state of the inner surface of the hole. (1) Inspection project 1. Is the [...]
First, the PCB industry market size forecast PCB is a bridge that carries electronic components and connects circuits. As the "mother of electronic products", PCB is widely used in communications, consumer electronics, computers, automotive electronics, industrial control, medical equipment, defense and aerospace. Electronic components that are indispensable in information products. The PCB industry is a [...]
In 1950, the first panel appeared. The single-panel material was made of paper phenolic substrate. The simple understanding of the double panel is that there are wiring on both sides. This makes it better. The multi-panel refers to more than 2 layers. Price, please see below The history of single-sided boards: The single-sided printed circuit [...]
With the development of the times, electronic products are increasingly inseparable from our lives, from computers to mobile phones. However, electronic products always face a problem, that is, they are broken. This is inevitable for electronic products. After all, electronic products also have longevity. Speaking of this, do you have any electronic products removed? I [...]
Electrolytic capacitor symbol problem? How do you look at the positive and negative electrodes of this electrolytic capacitor? a ball on the board, divided into two, half black and half white answer: If there is no black, the white is usually the negative. Half black and half white, black is negative Capacitance symbol 2. Two [...]