Hi this is my firts post

i need to do something linke in topic "adder gate nor" someone can do it?

 

Your question is hard to understand. NOR gates are not necessarily parts of adders. They can exist on their own. Try our Ebook - http://www.allaboutcircuits.com/vol_4/chpt_3/6.html

 

NOR gates, like NAND gates, can be used to construct any other logic gate.

Have a look at this Wikipedia entry:
http://en.wikipedia.org/wiki/NOR_logic