Step 9: Making a Dry Erase Board

Due to the nonporous nature of aluminum foil, it works very well as a dry erase board. We can easily make a portable, flexible dry erase board by making a piece of one sided LAF, cutting it to A4 size (or letter paper size...), hole[punching it, and then putting it in a binder.
I keep one in the front of my math binder, it is very useful for sketches and quick calculations. Make sure that you don't write with a pen or pencil on a piece of paper that is on top of the LAF, as it will leave marks.
I would really like to use this to make alternative input devices for computers and synthesizers. It looks really cool. <br> <br>But I'm wondering. How are the circuits not bridged when a button is not being pressed? Maybe it would help if you show how the layers of LAF are stacked on top of each other.

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