I have a couple of things that I have done and I want to write and retain schematics of them. One is a fancy phase converter with two idlers that are switched at different times. Another is a fancy wiring scheme for my compressor, to permit "on demand" vs "continuous" run, as well as a start button to prevent unintended starts.
I did it without drawing schematics just by keeping it in my head.
In any case, I still remember how I did my phase converter 4 years ago, but I do not want to rely on my memory.
So. Is there some easy to use Linux software that is available under ubuntu, that I could use to draw electrical schematics.