1-   Interactive Power Electronics Seminar (iPES)

          www.ipes.ethz.ch

2-    Electronic circuits, circuit diagrams, design and electronics  schematics

     www.electronic-circuits-diagrams.com

3-    IEEE organization

     www.ieee.org

4-    European Power Electronics and Drives

     www.epe-association.org

5-    Southern electrical company

www.selco.ps