6.Arduino learning notebook--Digital Tube Experiment


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1. Let's talk about PCB--- PCB's History

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1 . Let's talk about PCB--- PCB's History        Juvtmall  ( a company supply PCB Prototyping , PCBA service  and sell kinds of components, modules  and so on) Development of the methods used in modern printed circuit boards started early in the 20th century. In 1903, a German inventor, Albert Hanson, described flat foil conductors laminated to an insulating board, in multiple layers. Thomas Edison experimented with chemical methods of plating conductors onto linen paper in 1904. Arthur Berry in 1913 patented a print-and-etch method in the UK, and in the United States Max Schoop obtained a patent to flame-spray metal onto a board through a patterned mask. Charles Ducas in 1927 patented a method of electroplating circuit patterns.                                                                        PCBA Service The Austrian engineer Paul Eisler invented the printed circuit as part of a  radio  set while working in the UK around 1936. In 1941 a multi-layer printed
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6. The design of PCB-- related skills

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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
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