Run Proteus ISIS 7 to enter the PCB design interface, and select required components according to the component library. The P0.0-P0.7 ports of lpc2138 are used as the output end of 8-bit data, and P0.8, P0.9 and P0.10 are used as the output end of contro
The image recognition technology is applied to the precise measurement of printed circuit boards. The test results show that the system has a high accuracy (0.6μm), which can meet the high precision measurement of printed circuit boards.
PCB plan. Such as some large power board (such as power supply class), due to the PCB generally has more large volume components, such components due to more simple heat absorption makes the whole piece of PCB heating uneven, even sometimes dewetting appe
At present, PCB board manufacturers generally adjust PCB prices according to different payment methods, ranging from 5%-10%, which also causes the difference in price.
In addition, pcb purchasers should pay attention to the point that when choosing pcb board manufacturers, they should not only choose from the perspective of price, but also compare the strength of pcb manufacturers, approximate product quotations, and se
Frame line as the basis of PCB circuit board contour processing, cutting processing can only be processed straight shape, special-shaped local available punch and milling machine processing.
When selecting the thickness of steel sheet, under the condition that the quality of solder joint is guaranteed, the lower thickness shall be selected according to the standard of IPC-7525A and the actual PCB components, and the larger one shall be avoide
The mechanical driving part is driven by the CAM spindle to drive the feeding mechanism, and the striking arm of the feeder is quickly found. The ratchet connected with it drives the component braid forward a distance through the connecting rod, and drive
The mechanical driving part is driven by the CAM spindle to drive the feeding mechanism, and the striking arm of the feeder is quickly found. The ratchet connected with it drives the component braid forward a distance through the connecting rod, and drive
It not only reduces the number of I/O interfaces and pins, but also makes it easier to wind PCB wires. Therefore, many RF component manufacturers have accelerated the development of MIPI interface solutions to further simplify the design complexity of car
The outermost wire or device of the PCB circuit board should be no less than 2mm away from the edge of the circuit board, which is conducive to the fixing of the PCB board and prevent the change of impedance value.
The less interlayer alternations between pins of high-speed circuit devices, the better. The so-called "the less interlayer alternations of leads, the better" means that the fewer holes used in the connection of components, the better.
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