Juvtmall

Every led represent a tune, and this tiny project is based on a Catduino, a breadboard and several LED. Click www.juvtmall.com  for more information.                   ----------------------

Little Star + LED, do you love it? Click www.juvtmall.com , let's have fun ! And you can find much surprise.

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 overlapped in the same PLANE, and SPLIT2 is inside the SPLIT1, which automatic