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PCB and PCBA A PCB (Printed Circuit Board) is a board that electrically connects electronic components using conductive traces, pads, and other features etched from copper foil laminated onto a non-conductive substrate. PCB’s can be  single sided  (one copper layer),  double sided  (two copper layers), or  multi-layer  (outer and inner layers). Conductors on different layers are connected with vias (plated-thru. holes). Multi-layer PCB’s allow for much higher component density and design complexity. PCBA (Printed Circuit Board Assembly) is the board obtained after all printing solder paste on the PCB and then mounting various components like resistors, ICs (Integrated Circuits), capacitors and any other components  like transformers depending on the application and desired characteristics of the board. A PCBA usually undergoes reflow furnace heating to establish a mechanical connection between the PCB and the components.

6. Basic requirement of designing multiple layer PCB       Juvtmall  ( a company supply  PCB Prototyping ,  PCBA service  and sell kinds of  components, modules  and so on)  Determine out shape, size, layers. Any plate, there are problems with other structural parts, so the shape and size of the printing plate must be based on the product machine structure. However, in terms of production process, it should be as simple as possible, generally for the long width ratio not too wide of the rectangle, to facilitate assembly, improve production efficiency, lower labor cost. The number of layers must be based on the circuit performance, the size of the plate and the intensity of the line. In the case of PCB multilayer, the application of four layers and six laminates is the most widely used, with four layers as an example, which is two conductor layers (surface and welding surface), a power supply layer and a layer. Th...

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....

5. General principles of PCB design Juvtmall  ( a company supply  PCB Prototyping ,  PCBA service  and sell kinds of  components, modules  and so on)  The special components layout First, consider the size of PCB: when the size of PCB is too large, the printing line is long, the impedance increases, the anti-noise ability decreases, and the cost increases  too  small, so the heat dissipation is not good, and adjacent lines are easily disturbed.   After determining the PCB size, make sure the location of the special components.   Finally, l ay  out.the entire components of the circuit   according to the function unit of the circuit . The following principles shall be observed in determining the location of special components: A. To minimize the connection between high frequency components, try to reduce their distribution parameters and electromagnetic interference between them.   Vulnerable componen...

1.The design of PCB Juvtmall  ( a company supply  PCB Prototyping ,  PCBA service  and sell kinds of  components, modules  and so on)  In PCB design, the layout of the components and the wiring of the circuit are the two key links. Layout, means the circuit device in the printed circuit board wiring area. Whether the layout is reasonable not only affects the wiring work at the back, but also has an important effect on the performance of the whole circuit board. After guarantee ing  the circuit function and performance index, to satisfy the requirement of process, testing and maintenance aspects, components should be uniform, neat  and compact   on the PCB, as far as possible to reduce and shorten the lead and the connection between components, in order to get symmetrical   packing density . The position of each functional circuit unit is arranged according to the circuit process, the input and output signal, ...

5. see the version   Juvtmall  ( a company supply  PCB Prototyping ,  PCBA service  and sell kinds of  components, modules  and so on)  There are so many ways to see the version: 1.by smartphone First, download two software: JuiceSSH              this is terminal AndroidVNC           this is VNC used to display the version Ensure the smartphone and Raspberry Pi has connect to the same network, you can open the USB wifi share of smartphone, then connect Raspberry Pi and smartphone with an USB cable, try to get IP of Raspberry Pi. Open JuiceSSH, set a new connect, give it a name and input Raspberry Pi’s IP, connect it, you can see that it’s easy to write command via smartphone for it has serve for many shortcut key. Set up a software by the following command: sudo app-get install tightvncserver This command ...

4.Set static IP   Juvtmall  ( a company supply  PCB Prototyping ,  PCBA service  and sell kinds of  components, modules  and so on)  You may say: no, though I can use Wi-Fi and don’t need network cable, I still have to use Advanced IP Scanner to search IP of my Raspberry Pi, it’s so inconvenient. I will teach you how to set static IP First: input the following command: sudo nano /etc/dhcpcd.conf Secondly: input these command to the bottom line:              interface eth0 static ip_address=       (the static IP you want) static routers=          (your routers) static domain_name_servers=     (domain) Tip : this is the way to set eth’s static IP The following is about how to set wireless static IP: Input the command: interface wlan0 static ip_addres...

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  ...