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Have you noticed that now more and more of our lighting is using led lighting.What is LED? Compared to the traditional light bulbs, LEDs have lower power consumption, longer lifetime and higher energy efficiency. In the PCB industry,when we say LED PCB, it refers to the pcb used for LED lighting, if you are looking for a suitable LED PCB for your lighting system, this article may bring you something. WHAT ARE LEDS COMPOSED OF?LED is an initial light-emitting diode that produces light when an electric current passes through. LEDs typically have negative and positive electrodes, which generate light in the visible light region.The LEDS are glued to the PCB by soldering process and have electrical connections for lighting.Since light-emitting diodes dissipate a lot of heat when they are in use, when you are designing LED, the metal core is usually the best choice for LED PCB, it is because that it dissipates heat more faster. Among them, the metal material aluminum is the most widely used
PCB surface installation 1) Because the printed board has eliminated a large number of large -guided pores or buried holes interconnect technology, the wiring density on the printing board is increased, and the area of the printed board is reduced (generally one of the three -pointers for inserted installation), and at the same time It can also reduce the number of design layers and costs of the printed board. 2) Reduce weight and improve seismic performance, and adopts glue welded and new welding technology to improve product quality and reliability. 3) Due to the increased wiring density and shortening the length of the lead, the parasitic capacitance and parasitic inductance are reduced, which is more conducive to increasing the electrical parameter of the printed board. 4) It is easier to automate more than the installation installation, improves the installation speed and labor productivity, and reduces the assembly cost accordingly. From the above surface safety technology
PCB printing 1. Live board printing There are many texts, few photos and pictures, there are many opportunities for changes in text, and the number of prints is not large -printed products between hundreds or thousands of printeds should be printed in live version. The number of divery printing should not exceed 30,000, and the fine picture electric version should not exceed 70,000 to 80,000. The printing pictures must be used to obtain a perfect outlet. Therefore, you cannot use cheap paper to print pictures and want to achieve exquisite results. When using the live version of the duct, the line of the line is easy to separate and disconnect, which is a common disadvantage. In addition, when the printing pressure is too large or the surface layer of the pressure cylinder is too soft, it will make the back of the finished product printing with relief, which will greatly reduce the quality of the print. 2. Silk net printing Because the screen printing and printing ink are particul
PCB generally includes 1. Program ID (PID, process handle): It is unique, and each process must correspond to a PID. PID is usually an integer number 2. Feature information: general subsystem processes, user processes, or kernel processes, etc 3. Process status: running, ready, blocked, indicating the current running status of the process 4. Priority: Indicates the priority size for obtaining CPU control 5. Communication information: a reflection of the communication relationship between processes, as the operating system provides communication channels 6. On site protection zone: used to protect blocked processes 7. Resource requirements and allocation control information 8. Process entity information, indicating the program path and name, whether the process data is in physical memory or in swap partitions (pagination) 9. Other information: work unit, workspace, file information, etc
PCB polychlorinated biphenyls Polychlorinated biphenyls were artificially synthesized organic compounds used commercially in North America from 1929 to the late 1970s. Although Canada did not process and produce this chemical substance, it has been widely used in electrical equipment insulation, heat exchangers, water systems, and other special applications. It took decades for people to realize the global environmental pollution caused by polychlorinated biphenyls, which are mixtures of various chlorinated biphenyls and pose great harm to human health. The Canadian government once took measures to try to eliminate PCBs, but in 1977, illegal imports, processing and sales of PCBs occurred in Canada, and in 1985, PCBs were illegally released to the natural environment. The Canadian Constitution allows PCB equipment owners to continue to use PCBs until the life of the equipment. Since 1988, provincial governments in Canada have only begun to regulate the storage, transportation, and d
PCB plug terminal Part of the wire is pressed tightly and then inserted into another part, which is welded to the PCB board. The bottom mechanical principle of this connection ensures the long-term airtight connection of the product and the reliability of the finished product through this anti vibration design. Both ends of the socket can be equipped with mounting ears, which can greatly protect the connectors and prevent poor placement of the connectors. At the same time, this socket design ensures that the socket can be correctly inserted into the mother body. Sockets can also have assembly and locking buckles. The assembly buckle can be more firmly fixed to the PCB board, and the locking buckle can lock the mother body and socket after installation is completed. 1. Curved and straight pin plug terminals (incoming direction at 270, 180, and 90 degrees to PCB board) 2. Fixed with screw flange ears and flange without screws 3. Screw connection and spring connection 4. Spacing: 3
PCB insertion and extraction force detection The reason for the inspection is that there are burrs or dirt stuck at the screw teeth of a few installation holes. Especially when using the last few installation holes that have already been connected to a plug-in terminal plug socket by the factory, if the defect is found, the crimping wires of the other holes that have already been installed must be removed one by one and the plug socket replaced. In addition, due to improper matching of wire diameter and crimping aperture, or due to incorrect crimping process operation, it can also cause accidents of unstable crimping ends. For this reason, the production factory needs to conduct a test on all installation holes of the delivered plug (socket) samples before the finished product leaves the factory, that is, use loading and unloading tools to simulate the wires with crimped pins or sockets and send them in place to check whether they can be locked. According to the product technical sp
PCB self-service selection NC, is the internal product number of Nachuan Electric 1.5 refers to the cross-sectional area of the product being 1.5mm 2. Refers to the number of terminal positions, and the number of digits can be changed as a parameter ST, referring to the plug 3.50, which refers to a variable parameter with a spacing of 3.50 If: NC 1.5/2-STF-3.50 plug-in terminal blocks, only ST becomes STF, indicating a flange with side screws The terminal housing is usually labeled with product information, which allows users to identify the basic parameters of the product to prevent operational errors during installation and connection, and can play a simple preventive role. There are permanent markings on the main parts of the shell as follows: a. Terminal rated voltage (V) b. Terminal rated current (A) c. Terminal model d. Terminal trademark or manufacturer name e. Product Certification System
PCB gong board machine *Desktop single table cutting machine, with a speed of up to 100mm/s and a positioning speed of 500mm/s. *Capable of continuous cutting without interruption during loading and unloading. *A high-quality shaft system enables the system to quickly accelerate and decelerate, reduce synchronization time, improve productivity, and maintain high accuracy. *Use high-quality hardware to ensure high rigidity and performance. *All guide screws are covered to prevent dust and dirt from entering, thereby improving the lifespan and performance of the shaft. 1. Drive system motor: servo/stepper motor 2. Spindle speed: 50000r/s 3. Cutting performance: 500mm/s 4. Repetitive accuracy of driving system: ± 0.02mm 5. Cutting speed: Maximum 100mm/S depends on circuit board material and cutting quality 6. Resolution: ± 0.01mm 7. Configuration: X, Y, Z three axes, stroke: 300X300X80mm, stroke can also be customized. 8. Repetitive accuracy:<0.1mm, for the contours of stra
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