Create own Membrane Matrix Keypad (and hooking it up to the Arduino)

Step 2 Collecting the materials.

The really cool thing about this instructable is you probably already have all the things you need to build this in your house! Yes when I say that this is a simple, cheap, effective way of making a keypad I mean that it is simple and cheap. For this instructable you will need:

Aluminum Foil (tin foil... some sort of foil) *foil tape works well also
Some sort of paper or flat material (what you choose here will effect the durability. I'm using a dry erase pad for my fridge)
glue (unless you're using foil tape)
and a spacer of some sort (a few layers of paper with holes cut in them may work I'm using double sided sticky foam pads)

Laminator (COMPLETELY OPTIONAL)