When you create a Printed Circuit Board in most cases you want to route the power supply lines with a wider width than normal signal lines. You must do this to reduce the inductance and the power supply lines to obtain a good quality power supply. This no

Elephant Dreams is the first movie following the Open Source model. It is free and can be distributed by everybody. The movie itself is short but really nice.

Kicad is a schema and PCB designer solution, a complete and powerful CAD solution of eletronic engineers and hobbyist.