Sticky post.

[Dual Op Amp]

How do I ask for a sticky post, and who do I ask?

[Evo]

The forum mentors decide if a post should be made sticky (permanent). You can pm the forum mentor if you have something you think would qualify, but the decision rests with the mentor.

[dekoi]

Double post.

http://physicsforums.com/showthread.php?t=53528