Hi. I am not new to electronics, but I am new to KiCad, and I seem to be making a mess of my first schematic.
It’s a very simple circuit with a dual op amp. I got my input pins the wrong way round, and because I like to draw with the inverting input (ie. pin 2 or 6) on top, I thought I’d modify the part. Clearly I got it wrong, because although Unit A of the op amp turned out fine at first, Unit B was still wrong. I couldn’t find a way to change Unit B’s pin arrangement, and in the process I have managed to totally remove pin 5 and have no idea how to reverse any of this.
If someone could please help me to a) get the LM358 back to its original form, and b) properly modify it so both halves appear with the inverting input above the non-inverting input (but without reversing the power supply pins) I would be a very happy man.
Thank you 
Nathan
By right-clicking on the schematic symbols and using the “Rotate” and “Mirror” operations from the “Orient Component” menu, you can get results similar to what is in this screenshot:
Personally, I find this quite usable though it’s not exactly what you’d like to have.
I don’t know if reinstalling KiCAD (say, using the latest interim build from http://downloads.kicad.org/windows/nightly/ ) will over-write the libraries and restore the original symbols, or not. There are several dual (and quad) opamp symbols in the “diy_ics” library. diy_ics.lib (3.2 KB)
diy_ics.dcm (181 Bytes) These symbols - or even the complete library - could be used to replace the faulty symbols you have.
It sounds like you have introduced multiple faults into your symbol library. Hey, that is NOT an insult - it means that you took the initiative to investigate a problem based on your best understanding of the situation you face. But troubleshooting, fault isolation, and correction in a system with multiple faults is MUCH more complex than a single point of failure. Consequently I’m goint to direct you to the KiCAD “Tutorials” at https://kicad.org/help/tutorials/ Please do some study on how to create symbols and especially the topic of multi-section components. (Some folks would take your LM358 Dual Opamp and make it into a THREE-section part: one section for each opamp, plus a separate section for the power connections ONLY.)
Dale
Thanks Dale!
Yes, I’d considered reinstalling, as this is my first KiCad project and it wouldn’t be a major hassle. No insult taken at all, messing up the library has been… educational 
Thanks for the link to the tutorials too.
All the best
Nathan
It’s the check boxes “common to all units”
You need to be careful with.
Unchecking them will eventually make you succeed.
If checked, whatever you edit in one unit reflects into others.
And that gets confusing if you are not prepared for it.
1 Like
Indeed.
A quick bit of Time Machine restoration of the library file in question sorted out my errors, and I’ve decided to just stick with the existing pin arrangement and draw around it for now.
Thanks
