How to use ad wiring for PCB design?

If you want to be a qualified Hardware Engineer ,pcb Design is a necessary skill . Currently making pcb There are many kinds of software , You can use it without saying , But at least you have to use one .

First step ： Display the name or model of the sub package

Figure 1

Figure 2

Pass diagram 1 We can see that the resistance has only one number R34, How to display the resistance of this resistor ？ At this time, you can double-click the package to be modified （R34）, Pictured 2 Shown ： Remove... From the pop-up attribute box Hide Checked by , View after confirmation PCB The R34 The resistance to 10k（ Figure 3 ）.

The second step ： Modify the size of screen printing font in batch

As shown in Figure 3 R34 Does this number look a little big , How to change its size ？ You can press the shortcut keys in turn “E”“N”, Choose whichever you want to modify , After selection, it will be displayed in the pop-up window , As shown in Figure 4 , Change the selected places in three of the red boxes to Same, First click “Apply” Click again “OK”.

After the above modification and confirmation , Follow R34 The same settings are selected . And then extHeight from 60mil Change to 30mil, hold Textwidth from 10mil Change to 5mil, And then you'll see R34 This number is called smaller . Pictured 5 Shown ：

The third step ： Batch display the model or attribute of the package

Through the above, we just changed the size of the number , But the attribute value 10k Nothing has changed , How to change the size of this attribute ？ You can start with the operation in the previous step , Press shortcut key “E”“N”, And then choose 10K, Then select the attribute to be modified , And then in the pop-up window （ As shown in Figure 6 ）, Check hide first and then remove it , So all of 10K It will all show up , Isn't that easy . After the above modification, all models and resistance values can be displayed , As shown in Figure 7 ：

Step four ：PCB Reasonable layout and wiring

Don't forget to lay the lower layer after the top layer is laid . If the two layers of copper do not completely coincide during copper laying , It can be adjusted as follows . Set the origin position after the copper layer is completely paved .

Try not to leave a right angle when wiring , If you want to improve the wiring level, you need to practice constantly . When the wiring is finished , The split box is also up , Then you can lay copper , The copper layer is generally designed as GND, Remember to lay copper on both the top and bottom floors . The specific operation is as follows ： First choose the layer you want to lay , Then click the copper laying shortcut key , After the edit window pops up, we manually modify the next few steps , As shown in the figure below .

When all the work is done , Go to the last step, electrical DRC testing , Pictured 10 Shown ：

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