aluminum core pcb led

1.Definition of ground What is ground? The definition of ground that everyone learns in textbooks is: ground is an equipotential body that serves as the potential reference point of the circuit. This definition does not conform to the actual situation. The potential on the actual ground is not constant. If you use an instrument to…

How to reduce the mutual interference between digital signals and analog signals? Before designing, we must understand the two basic principles of electromagnetic compatibility (EMC): the first principle is to reduce the area of ​​the current loop as much as possible; the second principle is that the system uses only one reference plane. On the…

At present, there are four main new generation cleaning technologies for circuit boards: 1.Semi-aqueous cleaning technology Semi-aqueous cleaning mainly uses organic solvents and deionized water, plus a certain amount of surfactants and additives to form a cleaning agent. This type of cleaning is between solvent cleaning and water cleaning. These cleaning agents are all organic…

Tin wire is one of the welding materials for electronic products, and tin wire is divided into lead tin wire and lead-free tin wire. The price of lead-free tin wire is much higher than that of lead tin wire, which will greatly increase the cost of welding materials. Why should automatic soldering machine merchants choose…

PCB copper-clad laminate is the substrate material for making printed circuit boards. In addition to supporting various components, it can also achieve electrical connection or electrical insulation between them. The manufacturing process of PCB copper-clad laminate is to impregnate glass fiber cloth, glass fiber felt, paper and other reinforcing materials with adhesives such as epoxy…

A brief analysis of the influence of thixotropy on ink performance in PCB board making Core summary: The success or failure of ink use directly affects the overall technical requirements and quality indicators of PCB shipment. For this reason, PCB manufacturers attach great importance to the performance of ink. In addition to the well-known viscosity…

The SELEX airborne radar discussed in this article uses a scalable design with a dynamically reconfigurable active backplane to serve multiple vector computing (VP) boards. Such a design can use the intelligent backplane to degrade service by shutting down the power to the suspect board when a board failure occurs. The main communication processor allows…

Currently, most hardware engineers still design PCBs based on experience. During the debugging process, many signal lines or chip pins that need to be observed are buried in the middle layer of the PCB, and cannot be detected using tools such as oscilloscopes. If the product fails the functional test, they have no effective means…

On printed circuit boards, copper is used to interconnect components on the substrate. Although it is a good conductor material for forming the conductive path pattern of the printed circuit board, it is easy to lose its luster due to oxidation and lose its solderability due to corrosion if exposed to air for a long…

Dry film solder mask is not in liquid or paste form, it appears in the form of a photosensitive polymer film, which is sandwiched between two protective layers. These two protective layers protect the middle photosensitive emulsion film to prevent it from being damaged during operation. The steps for applying dry film solder mask are…

The input component is a signal source for image processing. The quality of this signal will affect the overall processing effect. The most important problem is that the input device introduces noise. Therefore, any image processing system does a lot of work to remove this noise. For example, under the meteorological satellite receiving antenna, a…