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PCB project made by juvtmall, #pcb prototyping#pcb assembly# Do you want to have a try? http://juvtmall.com/services/ Email: ann@juvtmall.com Whatsapp/Wechat: +86 13392411760

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...

RMF69 Shield-433MHz contains a FSK wireless module, it has the same function that radio frequency transmitter owns, such as receiving and transmitting message. RMF69 Shield-433MHz can totally compatible to Arduino. Features Low consumption More professional ISM band Frequent range from 140 to 960MHz  Totally compatible to Arduino http://juvtmall.com/rfm69-shiled_p0808.html

  Juvtmall  ( a company supply  PCB Prototyping ,  PCBA service  and sell kinds of  components, modules  and so on)  Here, you can know the details:  http://juvtmall.com/simduino_p0814.html Contact me: ann@juvtmall.com

2.  Method of wiring on multiple layers PCB       Juvtmall  ( a company supply  PCB Prototyping ,  PCBA service  and sell kinds of  components, modules  and so on)     Generally, four layers board can be divide into top layer, bottom layer and two internal layer. Internal layer: by command “DESIGN/LAYER STACK MANAGER” use “ADD PLANE” add “INTERNAL PLANE1” and “INTERNAL PLANE2” as VCC and GND in power and GND layer (tip: don’t use “ADD LAYER”, it will add MIDPLAYER, it’s used in multiple layer of signal track), if there are several power layer such as VCC2 or GND layer such as GND2, then use bolder wire or FILL to draw a district on power of GND belongs to PLANE1 or PLANE2,  use PLACE/SPLIT PLANE to make a corresponding district (VCC2 copper and GND2 copper flakes are not present in this area in the same PLANE) tip: different surface layers in the same PLANE and try not to overlap.SPLIT1 and SPLIT2 are overlappe...

Multiple Layer Board   Juvtmall  ( a company supply  PCB Prototyping ,  PCBA service  and sell kinds of  components, modules  and so on)  PCB Multilayer Board means multilayer board used in electrical product, it involves wild area, such as home appliance, computer accessories, communication, toy, instrument, LED and so on. PCB(printed circuit board) Multilayer Board is consist of track on several layer of insulation substrate and pad, it has two function: conduct every layer ’ s circuit, insult mutual layer. As the develop of SMT, the launch of new SMD (such as QFP, QFN, CSP, BGA), electrical product become more intelligent and smaller. Since HDI is created, the develop these process technology lead the design of PCB to multiple layer, and high density.   1 . Process of multilayer board   1. PCB which has draw the track: Put on the board, acidity deoiling, scanning rinsing, second reflux rinsing, micro etch, ...

. 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...