Step 1: The theory
Step 2: You will need
- Aluminium Foil
Step 3: Dissasemble the keyboard
You should see 'sheets' of circuit. There are 2 with printing, and a divider
Step 4: Pad it up
Grab some cardboard (half Manilla folders work well) and some of the aluminium foil. Put one 'panel' of the foil onto each of the inside panels of the folder (they must not touch). Attach a wire to each of the al foil panels.
Next, cut some plastic to size (I'm using transparencies here), and cut some holes in it, tape it over one of the aluminium panels
Rinse and repeat. I created 2 for the purpose of this instructable.
It is probably a good idea to test with a multimeter