Making OR/NOR Gates: Is it Possible? How?

[swuster]

Is it possible to make an OR / NOR gate from AND / NAND / NOT gates? If so, how?

Sorry for the simple question but I'm a little confused...

 

[negitron]

Sure. Start by reviewing the truth tables for the gates in question.

 

[berkeman]

And review DeMorgan's Law:

http://hyperphysics.phy-astr.gsu.edu/HBASE/electronic/demorgan.html

.