with 0.5v input will 741 gate with 0.5v.
what should i do to make it work to on a circuit?

 

When you place your post on the end of an old thread, it can be confusing. We strongly encourage everyone to start a new thread for each topic.

The thread that this one hijacked was http://forum.allaboutcircuits.com/showthread.php?t=9375.

Can you tell us more about your circuit? What is the op amp trying to do?