Lessons In Electric Circuits
A free series of textbooks on the subjects of electricity and electronics
This post should probably get moved to the other thread full of tutorial links… Can anyone find it?
I think I’ll also make it sticky this time, that thread has a habit of disappearing 
Maybe instead of being so “creative” with the tags, it would be good to search for similar threads, and create a sensible tag (like “tutorial” or something) on each of them