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CAD techniques for PCB design tutorial

Modules

1. The PCB Layout design flow
2. Starting a PCB project
3. The Layout design environment
4. Setting up the virtual board
5. Creating and editing obstacles
6. Working with footprints and components
7. CAD procedures for placing and routing

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Selecting and deselecting objects

This section describes the different ways to select individual objects and groups of objects. These selection methods work both in the design window and library manager. There are two selection modes available in Layout:

· autotool

· tool-specific

When you select the Activate AutoTool Select Mode option in the User Preferences dialog box, Layout selects objects without regard to the active tool. The active tool is the tool that you last selected for use. For example, if you last chose the component tool, it is the active tool. If you have trouble selecting an object using autotool select, it may be too close to surrounding objects. Choose the appropriate tool before selecting the object. After selecting the object, Layout automatically returns to autotool select mode. If you don’t select the Activate AutoTool Select Mode option, Layout uses the tool-specific method. This method of selection is useful if the board is dense and you have trouble isolating an object using the autotool select mode.

1. The PCB Layout design flow
2. Starting a PCB project
3. The Layout design environment
4. Setting up the virtual board
5. Creating and editing obstacles
6. Working with footprints and components
7. CAD procedures for placing and routing

pages: previous | 1 2 3 4 5 [6] 7 8 | next

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