First PCB artboard practice-MiniDV-Part1/3

Note: The post posted by the author on www.21ic.com is now reproduced. Http://bbs.21ic.com/icview-343175-1-1.html part 1/3.

When editing a blog post, the typographical conflicts with the web page have been changed several times. I don't know if it is a problem with sogou browser. Once the pictures on bbs.21ic. com are referenced, the layout of the blog is disordered. If you know the situation, tell me the reason. Thank you. First PCB: Bytes -------------------------------------------------------------------------------------------- Second edition PCB: Bytes -------------------------------------------------------------------------------------------- Some netizens reply as follows: Third floor:

the layout can be optimized. the crystal oscillator can be near the dot the chamfer can be inverted dot Cross can be connected to big points

5 th floor:

3 # Forgot  Thank you for your guidance. A cross can be bigger. What does a cross mean? When I drew a picture, I felt that the layout was quite difficult. After I placed the components by module, I pulled them onto the board. A lot of flying lines were crossed and it took a long time to reduce the layout. Is there any good way?

6 th floor:

Check for large parts, which can be optimized in many places. Try not to make acute angle at right angles; screw hole grounding can be bold, easily broken to the production line processing; mechanical hole and parts feet too close; signal line and pad connection should not be too fine...

Floor 8:

Gnd copper-Coated Cross Connection with the 4 large positioning holes pad 5 # It198888

10th floor:

The loading and capacitance line of the crystal oscillator is short, and the copper-clad spacing is large. The installation hole does not have to be connected to the power supply for 0 reference, which may cause interference.

11 floor:

The silk screen orientation is not neatly arranged Generally, they are aligned in a uniform direction, and the font size can be smaller, so that the overall appearance The Gnd cross line of the device can be 0.5 in width, Do not cross the hole.

Floor 12:

Okay. Regardless of the double panel, we should try to ensure that one Gnd is complete. Now there are many lines on the back. I don't know what you use. Generally, it is not very demanding. This works.

Floor 13:

The package size of components of the same type should be the same. For example, 0603 and 0805 This is more beautiful However, if the corresponding encapsulation is not the same, it should be another matter. Overall is pretty

15th floor:

This post was last edited by it198888 12 # Fliger  I have re-typed the relatively complete Gnd plane. The modified Gnd plane is at the bottom. Is it complete? Also, why is it necessary to design a relatively complete Gnd plane? Is it necessary to enhance the anti-interference capability or why? Thank you. [Br/]