1、 Foreword In PCB design, crosstalk generated by strong interference signal lines and signal lines sensitive to interference will exist between routing lines. This adverse effect is not only related to clock or periodic signals, but also affects other important routing, data lines, address lines, control lines and IO in the system. Most of the [...]
When selecting a circuit board manufacturing company, professional manufacturers should be selected through comprehensive comparison. The circuit boards produced by professional manufacturers are more affordable, have strong quality guarantee, and are relatively more guaranteed after-sales; Therefore, choosing an enterprise with strong PCB batch production service capacity is obviously less risky. The following small series will [...]
I believe that friends who have repaired more circuit boards must have encountered a short circuit of public power supply. In most cases, when you use a multimeter to test the resistance value between a power supply voltage of the circuit board and the ground, the display is very small, tens of ohms, a few [...]
PCB (printed circuit board), also known as printed circuit board and printed circuit board in Chinese, is an important electronic component, the support of electronic components and the provider of electrical connection of electronic components. Because it is made by electronic printing, it is called "printed" circuit board. With the smaller and smaller requirements of [...]
1. Pay attention to reset when there are large-scale integrated circuits on the circuit board to be repaired 2. Before the test, it is best to install the equipment back, turn on and off the machine repeatedly, and press the reset key several times 3、 Function and parameter test 1. < tester > the detection [...]
1. EPROM chip should not be damaged generally. Because this chip needs ultraviolet light to erase the program, it will not be damaged in the test WiFi microscope for circuit board detection WiFi microscope for circuit board detection Preface. But there is information introduction: due to the materials used to make the chip, it may [...]
Flexible waterproof casing - rigid waterproof casing - process and appearance The rigid waterproof sleeve is the main body of the steel pipe plus wing ring and sleeve. The ring made of steel plate is sleeved on the steel pipe and installed in the wall. It is mostly concrete wall, which is used for general [...]
Circuit board three proofing paint is a special formulation of paint, which is used to protect the circuit board and its related equipment from the erosion of bad environment, so as to improve and prolong their service life and ensure the safety and reliability of use. The three proofing paint is applied to the surface [...]
At present, there are four kinds of FPC: single-sided, double-sided, multilayer flexible plate and rigid flexible plate. ① Deep coupled circuit single-sided flexible board is the printed board with the lowest cost and low requirements for electrical performance. In case of single-sided wiring, single-sided flexible board shall be selected. It has a layer of chemically [...]
How hot is 5g now? Whether according to the latest statistics of the Ministry of industry and information technology, nearly 960000 5g base stations have been built in China, or according to the indicators of the 5g application "sailing" action plan (2021-2023), the number of 5g base stations in China will reach more than 2.52 [...]