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3.The design of PCB---General principles

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5. General principles of PCB design Juvtmall  ( a company supply  PCB Prototyping ,  PCBA service  and sell kinds of  components, modules  and so on)  The special components layout First, consider the size of PCB: when the size of PCB is too large, the printing line is long, the impedance increases, the anti-noise ability decreases, and the cost increases  too  small, so the heat dissipation is not good, and adjacent lines are easily disturbed.   After determining the PCB size, make sure the location of the special components.   Finally, l ay  out.the entire components of the circuit   according to the function unit of the circuit . The following principles shall be observed in determining the location of special components: A. To minimize the connection between high frequency components, try to reduce their distribution parameters and electromagnetic interference between them.   Vulnerable componen...
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11. The design of PCB (multiple layer board)--Basic requirement of designing multiple layer PCB VOL3

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Requirements of power layer, stratigraphic partition and flow-hole:     Juvtmall  ( a company supply  PCB Prototyping ,  PCBA service  and sell kinds of  components, modules  and so on)  For PCB multilayer, there is at least one power layer and one layer. Because of all the voltage on the PCB are in the same power level, so you have to partition the isolation of power supply layer, the size of the partition line generally USES 20 ~ 80 mil line width advisable, ultra-high voltage, the more coarse partition line. In order to increase the reliability of the welding hole and the power supply layer and the stratigraphic connection, it is necessary to design the shape of the flower hole to reduce the large area metal heat absorption in the welding process The aperture of the isolation pad is greater than that of borehole aperture +20mil Requirements for safe spacing The setting of safety spacing should meet th...
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Arduino learning notebook -- What is Arduino? (VOL. 2)

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2. Arduino learning notebook -- What is Arduino? (VOL. 2)          Juvtmall  (a company supply PCB Prototyping, PCBA service, sell module and so on)  Arduino Cheap --Comparing with other platforms, Arduino is much cheaper. The cheapest Arduino can be made by ourselves. Even if it is assembled, it will not cost more than $35 . The cross-platform  -- Arduino IDE can run on the operating systems of Windows, Macintosh OSX, and Linux. Most of other MCU compilers only run on Windows. The simple programming environment  - beginners can easily learn to use the Arduino programming environment, and it can provide advanced users with enough advanced applications. For teachers, it is very convenient to use Processing programming environment, so if the students have learned the Processing programming environment, they would feel easy in study. Because they are fami...
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