PCB Blogger-China PCB Factory,HOYOGO

  1. Circuit Diagram(Necessary) Whether it is a hand-drawn circuit diagram or a CAD-drawn circuit diagram, in short, at least a circuit diagram is required for  circuit board design . 2. Circuit power consumption calculation book(Not Necessary) This calculation book contains data about the power supply voltage and current flowing through each component. If this is not available, you need to design the width and spacing of the traces by interpreting the circuit diagram. In the absence of special software, free software can be used for circuit simulation. In addition, verify through written calculations, and record the voltage value, positive and negative, current value and flow direction for the places you need to inquire in the future. The application in circuit board design is to calculate the width of the trace based on the current flowing in a certain area, especially for voltage traces and GND traces, and can be used as a basis for designing connections the size and number of holes

Shenzhen HoYoGo Company has its own  SMT factory . We can provide SMT processing services for the Smallest package 0201 components, and supports various processing forms such as accepts customers' materials for processing and OEM. Next, we will introduce to you what inspections are required before SMT processing? First, SMT component inspection The main inspection items of components include: Solderability, pin coplanarity and usability. Sampling inspection should be done by the inspection department. In order to test the solderability of the components, stainless steel tweezers can hold the component body and immerse it in a tin pot at 235 ± 5 ℃  or 230 ± 5 ℃ , and take it out at 2 ± 0.2s or 3 ± 0.5s.  Check the soldering end of the solder under a 20x microscope, and it is required that more than 90% of the soldering end of the component is soldered. The SMT processing workshop can do the following visual inspections: 1. Visually or with a magnifying glass, check whether the solde

  I.  I mpedance matching  in  PCB design The design of PCB impedance matching refers to an appropriate matching method between the signal source or transmission line and the load.  According to the access method, there are 2 ways to design PCB impedance matching: serial and parallel. According to the frequency of the signal source, the design of PCB impedance matching can be divided into 2 types: low frequency and high frequency. In PCB design, high-frequency signals generally use serial impedance matching      The resistance range of the series resistance is 20~75 Ω , and the resistance value is proportional to the signal frequency and inversely proportional to the PCB trace width. In the embedded system,  serial matching resistances are generally required for signals with frequencies greater than 20M and PCB trace lengths greater than 5cm, such as clock signals, data and address bus signals in the system. There are two functions of series matching resistance: 1. Reduce high frequenc

Do you know why some PCB need to be plugged? In some projects, in order to meet the requirements of customers, the circuit board via holes must be plugged. After a lot of practice, the factory changed the traditional aluminum plugging process, using white mesh to complete the solder mask and plugging of the circuit board. This is not only stable in production, but also reliable in quality. Via hole plays the role of wire interconnection and conduction. The continuous development of the electronics industry also promotes the development of PCB, and also puts forward higher requirements on PCB manufacturing technology and SMT processing technology. Via hole plugging technology came into being, and should meet the following requirements: 1. It is sufficient if there is copper in the via. Solder mask can be plugged or not plugged; 2. There must be tin-lead in the via hole, and there must be a certain thickness (4 microns), and no solder mask ink should enter the hole, otherwise it will cau

  SHENZHEN HOYOGO ELECTRONIC TECHNOLOGY CO., LTD. has a PCB design team with more than 12 years of work experience. We are not only proficient in using mainstream PCB design software in the market, but also can conduct professional and efficient communication to ensure the progress of PCB design. We are a professional   PCB design company   that can help customers in related industries seize market opportunities as early as possible. What is pad? The pad is the basic unit of the surface mount component, used to form the land pattern of the circuit board, that is, various land combinations designed for special component types. The pad is used for electrical connection, device fixing, or part of the conductive pattern that combines both. Pad type in PCB design: I.  Common Pad 1.  Square  P ad --This type of pad is usually used when the printed circuit board components are large and few, and the printed wires are simple. It is easier to use this kind of pad when making PCB by hand. 2.  Ro

  In the specific PCB design process, the basic knowledge that needs to be mastered includes the following main parts: 1.  Preparation Including the preparation of component libraries and schematic diagrams. Before proceeding with PCB design, we must first prepare the schematic SCH component library and PCB component packaging library. The PCB component package library is best established by the engineer based on the standard size data of the selected device. In principle, the PC component package library should be established first, and then the schematic SCH component library should be established. Engineers have higher requirements for PCB component packaging library, because it will directly affect PCB installation; However, the requirements for the schematic SCH component library are relatively loose, but attention should be paid to defining the pin attributes and the corresponding relationship with the PCB component package library. 2.  PCB Structure Design According to the deter