Turn a Pencil Drawing Into a Capacitive Sensor
Alan Chatham of Unojoy wrote an Instructable on using pencil drawings as capacitive sensors:
Did you know? You can make pencil drawings reactive to touch for use with your projects! It’s really easy, and gives you a lot of flexibility in making interfaces for whatever microcontroller project you’re making.
Making a capacitive touch sensor from a drawing via Arduino
[original story: MAKE » Arduino]