There's a really good, single page webpage called "Concise electronics for geeks": http://lcamtuf.coredump.cx/electronics/ http://lcamtuf.coredump.cx/electronic

There's a really good, single page webpage called "Concise electronics for geeks": http://lcamtuf.coredump.cx/electronics/ http://lcamtuf.coredump.cx/electronics/ It's a good read if you're trying to learn the fundamentals.