QUESTIONS ABOUT ENCAPSULATION IN PROTEL 20

To put it simply, the SCH package is for you to see the components in the schematic, and the PCB package is for you to be able to see the components in the PCB.

1.The purpose of your schematic diagram should be to draw the PCB board, if there is no corresponding component package, then your PCB diagram cannot display the components indicated in your schematic, since there are no components, then how do you connect your PCB circuits?

2.If you draw a schematic that doesn't need to be converted to a PCB diagram, then you don't need a PCB footprint, but the SCH footprint of your component does, because without the SCH footprint of the component, you can't see the components, and there are no components to provide you with drawings.

As long as you draw a PCB circuit diagram, if you want to install electronic components on a PCB board, you must draw the packaging of these electronic components; All the electronic components on the PCB board need to be packaged, because in the production process of electronic products, the electronic components cannot be soldered to the circuit board without component packaging on the PCB board, in other words, the electronic product cannot be produced without the packaging of electronic components on the PCB board.

Because the circuit diagram made by the protel design software is to be stereotyped, carved, you can't say, the circuit diagram is drawn, there is no model, then the machine can not be stereotyped, the package is to provide the size of the components you draw, size and shape, etc., used to carve out his position on the board, and can solder the components.

1. In place.

When a component, press the "tab" key to come out of the properties of the component, among them"footprint"Select the appropriate package.

2. If you don't know the specific right of the component.

Encapsulation, you can enter the PCB, in the drop-down menu of Browse on the right side of the window, select Libraries (i.e., libraries), after installing Protel99Se, the default library is, there is no own packaging to create their own packaging. It is generally recommended to build your own commonly used package for ease of use.

3. The same package name can be called in all projects. You need to add the wrapper library yourself to call. You can add a package library to the system to view the package format. The package form given by the corresponding component in the general package library. For example, resistor 0805Wait a minute.

It is advisable to learn the basics.

You're using 99se, right? I haven't drawn a picture for a long time, and I can't remember a lot, so I'll tell you a little bit.

1. Header17 and header5*2 should be the meaning of connector or interface, packaging depends on what kind of connector you want to use, seat, 5569 seat, seat, etc., according to the size, you can find it in the packaging library, there is a packaging library called connect, there are many interface packages, some packages need to be done by yourself, or search on the Internet.

2. MAX3232 package, double in-line package, if you use SMD, take a closer look at the data sheet, or consult the seller clearly, some manufacturers will be divided into narrow, medium and wide body.

3. Is Phonejack a microphone interface, optocoupler or Hall? The packaging of the microphone interface needs to be done by yourself, and some of the optocouplers use double-line in-line packages DIP4, DIP6, etc., and some Hall components are the same as those of in-line transistors.

4. The packaging of chip capacitors, etc., is generally packaged with 0805 if soldered manually.

The package of the series is generally SOT-223, but there are other packages as well.

6. DB9 is a trapezoidal serial port with 9 pins or 9 holes, right? The package should be in the Connect's package library.

1. It is enough to know the commonly used devices, and those masters cannot remember all the packages, 2. If you have time, you can browse the component library of the printed board, learn more, and you can also try the library files of your own components.

3. When drawing the schematic diagram, you can put the same type of device first, so that you don't need to enter the package type repeatedly, and the system will default to the package of the previous device.

Right-click on the schematic surface and select place part to place the device to enter the above interface, enter the item (fourth item) in the last column, fill in the package name, you can change the component number (second item), parameter (third item), as long as you do not change the first schematic library file name (first item), then the devices placed after that are all the packages

Of course, if you don't add a footprint, you won't be able to generate a net list and you won't be able to load PCB components.

Double-click the component in the schematic, fill in the package number of the component in the footprint column, and click OK.

First of all, you need to be familiar with the package or size of each device you want to install, and then go to the package library to find it and know its name in that library, and then enter it in the device package column of your schematic, OK! In the post-conversion! And it will bring it in on its own.

The general switching power supply does not do the schematic diagram, usually uses the direct connection method layout, the schematic diagram is more complex to do the SCH diagram, do the diagram at the same time to bring the package into it, and then ERC check, and then do the netlist, that is, the netlist. After completion, bring it into the PCB interface, and there will be flying wires