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How to design PCB crystal oscillator?

We often compare the crystal oscillator to the heart of the digital circuit, because all the work of the digital circuit is inseparable from the clock signal, and the crystal oscillator directly controls the whole system. If the crystal oscillator does not operate, the whole system will be paraly... Read More

Analysis of three kinds of PCB stencil technology

According to the process, the pcb stencil can be divided into the following categories: 1. Solder paste stencil: As the name suggests, it is used to brush solder paste. Carve holes in a piece of steel that correspond to the pads of the pcb board. Then use solder paste to pad to the PCB board thr... Read More

Ceramic PCB circuit board

Advantage: Large current carrying capacity, 100A current continuously passes through the 1mm0.3mm thick copper body, the temperature rise is about 17℃; 100A current continuously passes through the 2mm0.3mm thick copper body, the temperature rise is only about 5℃. Better heat dissipation performan... Read More

How to consider safe spacing in PCB design?

There are many areas in PCB design where safe spacing needs to be considered. Here, it is temporarily classified into two categories: one is electrical related safety spacing, the other is non-electrical related safety spacing. Electrical related safety spacing 1.Spacing between wires As far as ... Read More

Thick copper circuit board

Introduction of Thick Copper Circuit Board Technology （1）Pre-plating preparation and electroplating treatment The main purpose of thickening copper plating is to ensure that there is a thick enough copper plating layer in the hole to ensure that the resistance value is within the range require... Read More

Five important attributes and PCB layout issues to consider in EMC analysis

It has been said that there are only two kinds of electronic engineers in the world: those who have experienced electromagnetic interference and those who have not. With the increase of PCB signal frequency, EMC design is a problem we have to consider 1. Five important attributes to consider duri... Read More

What is solder mask window?

Before introducing the solder mask window, we must first know what the solder mask is. Solder mask refers to the part of the printed circuit board to be inked, which is used to cover the traces and copper to protect the metal elements on the PCB and prevent short circuits. Solder mask opening ref... Read More

The PCB routing is very important!

When make the PCB routing , due to the preliminary analysis work is not done or not done, the post-processing is difficult.  If the PCB board is compared to our city, the components are like row upon row of all kinds of buildings, signal lines are streets and alleys in the city, flyover roundabou... Read More

PCB stamp hole

Graphitization by electroplating on holes or through holes on the edge of the PCB. Cut the edge of the board to form a series of half holes. These half holes are what we call stamp hole pads. 1. Disadvantages of stamp holes ①: After the board is separated, it has a saw-like shape. Some people cal... Read More

What harm will holding the PCB board with one hand cause to the circuit board?

In the PCB assembly and soldering process, SMT chip processing manufacturers have many employees or customers involved in operations, such as plug-in insertion, ICT testing, PCB splitting, manual PCB soldering operations, screw mounting, rivet mounting, crimp connector manual pressing, PCB cyclin... Read More

Why does PCB have holes in hole wall coating?

Treatment before immersion copper   1) . Burring The drilling process of the substrate before copper sinking is easy to produce burr, which is the most important hidden danger to the metallization of inferior holes. It must be solved by deburring technology. Usually by mechanical means, so that... Read More

Chip decryption

Chip decryption is also known as single-chip decryption (IC decryption). Since the single-chip microcomputer chips in the official product are encrypted, the program cannot be read directly using the programmer. In order to prevent unauthorized access or copying of the on-chip programs of the mic... Read More
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