Example demonstrating use of internal pull-up resistors. [imported]

[cmaglie]

This is Issue 290 moved from a Google Code project.
Added by 2010-07-11T22:47:14.000Z by dmel...@gmail.com.
Please review that bug for more context and additional comments, but update this bug.

Original labels: Type-Enhancement, Priority-Medium, Component-Docs

Original description

What change would like to see?

It could be nice to add an example of using the internal pullup resistors (in addition and contrast to an external resistor). This is especially relevant for the LilyPad, because adding an extra component can mean a lot of extra sewing.