LTspice modified resistor symbol

Thread Starter

crutschow

Joined Mar 14, 2008
30,438
The supplied LTspice zig-zag resistor symbol is rather non-standard as it has only 2 humps on each side, whereas typically the symbol has 3 or 4 humps.
Below is the modified symbol with 3 humps (4 seems a little busy to me), along with the attached .asy symbol file, if you are interested in changing the standard LTspice symbol to make the schematics look a little more conventional.
It's the same length as the 2 hump symbol so should cause no problem when older schematics are opened with the new symbol.

The added small bubble at the top indicates positive current polarity for current into that terminal.
It is not always apparent which direction is positive resistor current when it is plotted in LTspice, so the bubble will indicate that unambiguously.

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eetech00

Joined Jun 8, 2013
3,311
The LTspice zig-zag resistor symbol is rather non-standard as it only has 2 humps on each side, whereas typical is 3 or 4 humps.
Below is the modified symbol with 3 humps (4 seems a little busy to me), along with the attached .asy symbol file, if you are interested in changing the standard LTspice symbol.
It's the same length as the 2 hump symbol so should cause no problem when older schematics are opened with the new symbol.

The added dot indicates positive current polarity for current into that terminal.

View attachment 273494
Its good of you to share, but two problems with this:
1.When you place it on the schematic, it will be over-ridden by the symbol in the default LTspice user library.
So you have to give it a new filename or replace the original symbol in the user library.

2. If you share a schematic using this resistor, you have to remember to share the resistor as well.
 

Thread Starter

crutschow

Joined Mar 14, 2008
30,438
So you have to give it a new filename or replace the original symbol in the user library.
Yes, I should have stated that the best way to use it, is to replace the original symbol in the library.
That way there is no conflict and it will automatically appear in all schematics, old and new.
If you share a schematic using this resistor, you have to remember to share the resistor as well.
Only if the shared user wants the new resistor symbol.
Otherwise the resistor will just show on the schematic with the original symbol in the shared user's library.
 
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