best sites to learn the basic of electronics for Electronics engineer

What are some best sites to learn the basic of electronics for Electronics engineer.?

Basics of electronics is a wide term. The basic knowledge required to be an electronics engineer is quite comprehensive. You'll need a thorough understanding of Ohm's law, KVL, KCL, RCL-circuits, circuit analysis, diodes, mosFETs, amplifiers, programming, digital sequential and combinational logic, and boolean algebra, those are the most important things that immediately came to my mind. You also need an understanding of signals and LTI systems, digital communication theory, control system theory, instrumentation.