hey again. I notice your sensitivity about easy works and I appreciate that. But it is not such simple I guess. I finished my work. It was not an easy stuff to fight with huge and needless data. Here is my work. Unfortunately(fortunately) in turkish. It is about snubbers ( söndürücüler )... Here is a new question. I want to prepare my thesis next term on power electronics. But I want to use plc too. What kind of thema would you advice? Plc is a slow working device. Maybe I sall use microcontroller. But plc has a priority. I am open to every idea.