I'm trying to figure out what is considered a power line( for outlets) and data communication line.
What are the qualifying factors here.
I know
outlets have 120V AC at 60Hz
and data lines have anything around 0 to 12V, but I don't know how much current that allows.

so

What is the current limit for the Data line?
What is the voltage limit for the Data line?

I would expect that results can vary based on where to you live.
I live in Utah, USA


Question: How to make animated buttons in a menu with Cocos2d?
Answer: Create a FiniteAction from a Sequence and make the sprite asociated to the button play it on touch. Use the different classes available for different effects.

For the back-to-back you need two buttons, one drawn on top of the other with different priorities. Make one do a FlipY while the other does a flipY reverse and change the drawing priority.

Retract is just a Scale or Skew effect.