Juvtmall

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, scanning rinsing, second reflux rinsing, presoak coppe

9. PCB design related skills   Juvtmall  ( a company supply  PCB Prototyping ,  PCBA service  and sell kinds of  components, modules  and so on)  PCB design setting technique The PCB design needs to be set different points  in different stages. In the layout phase, the device layout can be used in the large lattice point . For large devices such as IC and non-locating connectors, the lattice site of 50~100mil can be selected for layout, and the grid point of 25mil can be used for the distribution of passive devices such as resistance capacitance and inductance.  The precision of the large lattice point  is beneficial to the orderliness  and beauty of components. PCB layout rules 1. In general , all components shall be decorated on the same side of the  boards, only the top-level element too close, set  some highly limited and calorific value small devices o n the bottom., such as SMD resistor, SMD capacitors, SMD IC, etc. 2. Under the premise of ensuring electric

8.Arduino learning notebook--Digital dice experiment               Juvtmall  ( a company supply  PCB Prototyping ,  PCBA service  and sell kinds of  components, modules  and so on)  ( Catduino has the same function of Arduino) Through the p revious experiments  of  digital tube experiments and buttons  that  control leds , you should have learned  the basic use of two devices.   This time, use the nixie tube and  button  to make a simple digital dice. The basic principle of the digital  dice  is that the nixie tube is  quick  to circulate between 1-8. When pressed, the nixie tube is fixed on the current number and  don ’ t  bounce . Take a look at the wiring diagram : Through the p revious experiments  of  digital tube experiments and buttons  that  control leds , you should have learned  the basic use of two devices.   This time, use the digital tube and  button  to make a simple digital dice. The basic principle of the digital  dice  is that the digital tube