I’ve been using commercial keyboards for all of my hacking life and I have to say when I first saw this functional keyboard made from paper and aluminum foil, I was IMPRESSED!
Nevermind how much money you can save but think about the customizations you can do. You could probably even make a full QWERTY keyboard if you wanted to.
Anyways, great instructable, highly recommended for those of you Arduino/other microcontroller modders to take a looky here.
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)