Drawing electrical symbols
changing an existing symbol
Double-click the symbol in panel "Symbols Textually" or right-click the symbol in panel "Symbols Graphically" and select the menu command
creating a symbol
File - New symbol. A new document is created. Draw the graphics elements
(lines, rectangles) that make up the symbol. Completed symbol must be saved in the
library - the directory that is set in the program settings in the "path" dialog.
creating a symbol based on another symbolIf you plan to create a symbol that is similar to some other symbol that already exists in the library, it is advisable to create it as a copy and sketch in the parts that are different. This will ensure the symbols in the library will keep their consistency in terms of dimensions, outlet locations, etc.
In the symbols palette, right-click on the symbol used as a pattern to open a menu containing two commands. The first one is
Open symbol; the second one is
Create similar symbol.
A dialogue box appears upon selecting the second command. Enter the new symbol title. If the symbol is supposed to be in a different group, press the
Change button and select the target group.
When confirmed using the OK button, the process of creating the new symbol is completed. All that is left to be done is making the changes that distinguish the new symbol from the original (sample) and saving the symbol.
The symbols are stored in files with "ppd" extension (normal symbols) or "picd" extension (integrated circuits).
When creating a symbol, graphical shapes need to be placed in a symmetric way, so that the symbol is symmetric to axes of the working screen.
positioning the outlets
The outlets need to be aligned. The figure shows an incorrectly positioned outlet which results in inability to wire the symbol, because the wire to another symbol would not be horizontal.
The majority of the symbols supplied with the program were designed with outlets spaced 2 mm or 4 mm. It is therefore preferable to keep these values in your symbols.
The output numbers shown in the print reports are derived from the order in which the outputs were inserted into the symbol. To check the order of outputs run a command
View - Show output numbers. Output order can be changed using the arrows in panel Explorer.
test your symbol
Before you start using the new symbol, test it in a blank drawing. Insert it in various positions, make sure it can be wired correctly and it looks consistently with the existing symbols.
If you drew several symbols, you can print them using command
File - Print Symbols and verify they look as intended.
renaming a symbol
The name of a symbol matches the name of the file in which it is stored, so just rename the file in any file manager (e.g. Windows Commander, Total Commander, Windows Explorer, etc.)
moving symbol to a different group
Move the file to a different folder using Windows Explorer or another file manager.
deleting a symbol or IC
Delete the file from the symbols library. You will find the path to the library in
File - Options - Paths
For organizing the files you can use any file manager, such as Windows Commander, Total Commander, Windows Explorer, etc.