Hello guys! I have tried reading AAC eBook seriously and have stopped at nonlinear conduction. you know what, i really have low motivation in reading eBooks unless if it is really important. I prefer physical books. I bought one (Electrical books) yrs ago and i can't understand it too. does the environment have significant over reading eBooks? i cant understand schematic. i know most of the symbols there but i dont know where the electron is really starting? you know what, what i really like is um power engineering, the big transformer at post near your houses. that's why my first po st is http://forum.allaboutcircuits.com/showthread.php?t=43850 um, do you know how iPod's case are made?