Andwin PCB Blog
Radiation generation Current causes radiation, not voltage, static charges produce electrostatic fields, constant currents produce magnetic fields, and time-varying currents produce both electric and magnetic fields. There are common mode current and differential mode current in any circuit. The differential mode signal carries data or useful signal, and the common mode signal is the negative…
1 Introduction In the production process of circuit boards, most manufacturers still use the wet film process for imaging due to cost considerations, which will inevitably cause undesirable problems such as “bleeding, bright edges (tin thin)” when pattern plating pure tin. In view of this , I will discuss with you the solutions to common…
Detection before power on After a circuit board is soldered, when checking whether the circuit board can work normally, you usually do not directly power the circuit board, but follow the following steps. It is not too late to power on after ensuring that there are no problems in each step. 1. Is the connection…
Figure 1(a), shows a simulation of vertical heat flow from a trace across the board to the other side. Simulations are for 100 mil wide, 1.0 oz. On the top layer of a 63 mil thick FR4 board, the thick traces are heated to almost 58 oC. This number seems impressive, but it is misleading…
LED display unit board PCB design rules 1. General principles (1) When the design rules are met, the production cost should be reduced as much as possible. For example, if two-layer boards can be used, try to use two-layer boards; when the cost conflicts with the design rules, the design rules should be guaranteed. (2)…
First: preliminary preparation. This includes preparing component libraries and schematics. “If a worker wants to do his job well, he must first sharpen his tools.” To make a good board, in addition to designing the principles well, you must also draw well. Before designing the PCB, you must first prepare the component library of the…
In recent years, my country’s PCB industry has achieved rapid growth. According to predictions from the China Printed Circuit Industry Association, my country’s PCB output value will reach US$12.05 billion in 2006, making it the world’s largest PCB production center. This growth trend will continue until 2010 or longer. However, if China’s PCB industry wants…
Single-chip radio frequency devices greatly facilitate the application in the field of wireless communications within a certain range. Using appropriate microcontrollers and antennas combined with this transceiver device can form a complete wireless communication link. They can be integrated on a very small circuit board and used in many fields such as wireless digital audio…
Key points: For a certain electronic equipment on the small satellite platform, the electromagnetic compatibility (EMC) design principles and specific methods are given, including structural design, shielding design, filter design and PCB board design. EMC tests show that the equipment The electromagnetic compatibility design is reasonable, which has a high reference value for the electromagnetic compatibility…
Latency is frustrating, both in our daily lives and in the devices we conveniently use. Propagation delay/time delay inhibits the intended functionality of the device. I say “I am responsible for your product” when I am responsible for the basic functionality of your product. These components are arranged in a specific pattern based on the…
The primary task of designing a circuit board is to work properly, but now the number of layers of PCB boards is getting higher and higher, the thickness is getting thinner, the line width and line spacing are getting smaller and smaller, and electromagnetic interference affects the quality of the printed board. factors emerge in…
1.What is multilayer pcb The biggest difference between PCB multilayer boards and single-sided and double-sided boards is the addition of internal power layers and ground layers. Power and ground networks are primarily routed on the power layer. Each substrate layer on a PCB multilayer board has conductive metal on both sides, and a special adhesive…
1. Preparation for PCB design Including preparation of component libraries and schematics. Before doing PCB design, you must first prepare the schematic SCH component library and PCB component packaging library. The PCB component packaging library is best established by engineers based on the standard size data of the selected devices. In principle, the PC component…
Why does PCB production require panelization and edges? 1.PCB paneling improves placement efficiency In the SMT industry, we often see panelization in SMT production lines, which are generally called two-in-one and four-in-one. This is because the patch line has many processes. The core equipment from the front end to the end is the printing machine…
Considerations and challenges of 5G technology on high-speed PCB The 5G era has arrived, and more and more mobile wireless communication systems are being upgraded and converted to adopt 5G technology to better connect to the Internet of Things (IoT). The astonishing speeds of 5G will open new market opportunities for all industries that use,…