Schematic drawing for pads

First, create a directory of new projects on our computer , For example, the directory shown in the figure below .

among LIB It is used to save our encapsulation library ,PCB For preservation pcb file ,SCH Used to save schematic files . After creation , We began to work on the circuit board .
Start by opening PADS Logic Software .

Click New in the upper left corner to start creating a schematic file .

Click ok . You can save it , Save to the folder we created before .

As shown in the figure below . Even if the schematic file is created , Now start to draw the schematic diagram

Click Library , Create a device library for our project .

After creation , Click manage library list to put our library file at the top .

The following figure shows the library I use here .

Click component editor under tools , Draw the originals we need

Because I am here to do a RGB Screen line sequence adapter board , take 50pin Conversion of 40pin, So let's draw a 50pin My seat , See the following figure after entering . First use g 100 Set the grid to 100, Reuse gd 100 Set the display grid to 100

Use here to start adding pins

Start editing electrical parameters after exiting

The pins are renumbered here .

You can also click Edit graphic to return to the graphic editing interface .

Here we use create 2D Draw a box with a line .

After modification, we exit the component editor . Then add it first to see what the effect is .

Click Add component .

It can be seen that there is no pin description , I also feel that this box is a little big , So let's revise again .

Right click the pop-up option in the blank space and select select component , Then select our , Then click Edit component , Go to the next page and click Edit graphic . Then add a name to the pin .
Then the figure is drawn , We also need to add cpb encapsulation , open PADS Layout

Then click... In the tool PCB Package editor , Here's the picture

Here we switch to millimeter units and use the modeless command umm You can add pads by doing the following

Right click to select padset padstack

We now combine the parameters of this device to complete this PCB encapsulation

Modify padstack parameters as follows

The width is the width of the device , The length is as follows, and then add 0.5mm The compensation value of

Set the first padstack information as follows ,

The calculation is as follows ,x The coordinates are three pins in total , Two spaces ,2* 0.95（ Pin spacing ）/2=0.95,y coordinate ：2.6 + 0.5( Compensation pin ) - 0.5（ One pin length ）/2=1.3, After setting the first one , Then step by step and repeat to get the other two , Then use the third pin , Use step-by-step and repeat to get the 4 individual , Up and then spaced 2.6.

Then use the 4 One is shown in the figure below , Get everything 6 A pin

As shown in the figure below , This makes it easy to package .

We then added a frame to make him look better .

As shown in the figure below , Add another dot , Express 1 Position of pin No .

Then put our frames on the screen printing layer , Right click the blank space and select the shape , Then select the frame we draw , Then select the layer in the following figure .

You need to select the options shown in the following figure

It's better to package and make in this way , Then the schematic diagram is made . After the schematic diagram is made , Let's check the schematic diagram with the following options

Generally, it is OK to see if it is not used , Determine whether the lower pins are used correctly . After confirmation, you can send the net list to pcb 了 , First click the options shown in the following figure

The following interface will appear .

Design options remove options

Modify the preferences as follows , Others remain default

So it's set up , Then use the following interface to send the net list .

Then I saw our device .

Then we use the decentralizing function to decentralize the devices , Right click on the space , Then select the component option ,

Select all components , Then right-click to select scatter and the following options appear , Then our option is .

So the devices don't overlap .

Then we need a board file , Let's draw a rectangular board and frame file , First select here ,

The following picture is drawn

Then modify the length and width of the frame to the size we need . Then we can start the layout and wiring , First use the modeless command z u Hide our flying line , There is no line after hiding , But there is still time to move .

Then we set the following options for different color labels , You can also use shortcut keys ,

First select the wire , Through hole , Pin , Then the pin number and net name of the back chord , Then set the network name color

After setting, start to set the via , The following options , Select padstack in settings .

The following interface appears , Then we choose via .

use first 1 Add via at , then 2 Set the via name at ,3 Set the via size , After that, the diameter of all three should be changed to 24

In this way, the vias are added . The drill hole size set here is 12 Mill , Then the diameter is 24

Then add design rules , First, enter the following options , Please use before setting um Set the unit to mils .

Then click the default option ,

First set the safety clearance , See the following figure for options

The following options are mainly set , Generally, it can be set as follows .

Then we set different colors for different networks , Right click the blank space to pop up the option , And then choose Select the network Options , All the same networks will be automatically selected ,

Select the network, right-click and select View network option ,

Set the following options , Then the application can

The set interface is shown in the following figure

Then set different values for different voltage networks in turn . And then click route Start Wiring .

When wiring, if the wiring is very thin like this, it will affect the feeling .

You need to set the options shown in the following figure

Then find the options shown in the figure below , Set to 0

Set the options

The line coming out in this way is normal .

The next step is to start wiring . Like this, you can only route on grid points , So how do we close it

First, double-click the blank space , Then the following options appear , Select grid

Set it as follows .