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. PCB design considerations   Juvtmall  ( a company supply  PCB Prototyping ,  PCBA service  and sell kinds of  components, modules  and so on)  (1) avoid setting important signal lines on the edge of PCB, such as clock and reset signal. (2) the distance between the ground wire of the enclosure and the signal line is at least 4mm; keep the length and width of the ground wire to be less than 5:1 to reduce the inductance effect. (3) lock the device and line that identified location with LOCK function, so that they will not be misused. (4) the width of the conductor should not be less than 0.2mm (8mil). In high-density and high-precision printed circuit, the width and spacing of the wires are generally preferable to 12mil. (5) Routing in the IC pin of DIP package, 10-10 and 12-12 principles can be applied, as between the two pins by 2 lines, diameter of bonding pad  can be set to 50 mil, width and spacing of line is 10 mil, when o...

6. PCB design related concepts Juvtmall  ( a company supply  PCB Prototyping ,  PCBA service  and sell kinds of  components, modules  and so on)  Via  holes: Once selected, be sure to deal with the gap between it and the surrounding each entity especially easy to ignore the gap between the line not connected to via hole of each layer in the middle   and via hole, if it is a automatic wiring, can be in "number Via minimization" (Via Minimiz8tion) in the sub menu select "on" to automatically solve. The larger load flow required, the larger hole size required, such as the larger the hole in the power layer and the other layer. Silk screen layer: For the convenience of installation and maintenance of the circuit, etc., it need s   printing logo and  writing code   on the upper and lower surface of the printing circuit , such as component label and nominal value,   the profile  of   the component and th...

3.How to set the Wi-Fi?        Juvtmall  ( a company supply  PCB Prototyping ,  PCBA service  and sell kinds of  components, modules  and so on)  I don’t want to use a network cable every time I want to use my computer. There are two methods to connect computer to Raspberry Pi: First, you have to connect Raspberry Pi with a network cable. Method one : use the screen designed for Raspberry Pi, this way could be visible Connect screen to Raspberry Pi, 1.if you have download Raspbian from my link, just choose corresponding size below and input it into your XShell. cd LCD-show/                   This must be input sudo ./LCD35-show                   for 3.5 inch screen (it can also use for 4inch screen) sudo ./LCD5-show  ...

How does the eight tails cat become nine tails cat in the end? For more details, you can click here: www.juvtmall.com The other blog

It is said that there is a kind of cat that can reach the heaven to become the god as long as nine tails. Every practice to one stage will have one more tail, but it is very difficult to success. When the cat uniting to eight tails, it will get a prompt to help its owner to achieve a wish, after the completion of wish, it will grow a new tail as well as fall off a tail. It is still eight tails. It seems like a strange cycle, that is to say it's impossible to build a nine tail anyway. A very devout cat, has been practicing for hundreds of years and helping many people realize the desire, but still eight tails. One day, it met a boy be trapped by wolves, by its nature, quickly drove the wolves and saved the boy, then found the youth is the first master's offspring. According to the rules, it needs to help the boy realize a wish. The cat asked the boy what his wish was, and he could not answer it for a moment. The day passed and the boy still didn't make a wish. The ...

For the pie falling from the sky, people always take it for granted. It may be the greatest generosity, the most sincere feedback, to spend our god-given luck to complete others. For more, please click: www.juvtmall,com