How can I label a pin on a part, and on the PCB, as active low using the convention of a bar above the text?
Unless someone can suggest a parts editor method, Iād expect you need to make a custom part and use Inkscape (or another svg editor) to add the bar. Its easy once you know how but learning how takes a bit of time. Do you have an example of a part you want done?
Peter
Canāt you just pull a label out of the bin and make a line and put it there as a work around, or do you want a permanent fix.
A permanent feature would be much better - something like a checkbox to indicate the signal is active low and automatically changing the font of that pin (or label etc) to include the top bar.
If the quick answer is āno, the software does not support this feature at this timeā, Iāll understand. I was hoping I had just missed a setting somewhere or there was an easy trick to doing it.
TBH Iām not going to spend a lot of time learning how to modify SVG files, so perhaps the easiest workaround is to simply add an apostrophe (or prime marker) to the end of the text like this: OEā or R/Wā as an alternative to indicating active low I learnt in my youth.
Thanks for the suggestions.
I realize this is an old topic but since it comes up in Google searches and there actually is a proper solution, Iāll add it here.
You can put an āoverlineā on top of any character by following it with Unicode character āCOMBINING OVERLINEā (U+0305). The overline will merge with the character. To do this with a whole word, insert the overline after each character in the word.
eg. RESET becomes RĢ EĢ SĢ EĢ TĢ
This works everywhere you would want it to ā unfortunately, the official āDroid Sansā font doesnāt render it very well. Itās an imperfect but practical solution.
Alternately, Unicode character āCOMBINING MACRONā (U+0304) can also be used. It works in very much the same way but may not combine with multiple characters as well. I also donāt think it is as semantically correct.
Hope that helps someone.
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