Create functioning UI with pencil
While the idea of hand-drawn electronic circuits is not new, many of these circuits simply make use of the conductivity of graphite instead of its capacitance. With capacitive sensing, the sketches become not only part of the circuits, but also the input. Such property opens up countless possibilities for interesting interactions and creative making.
In this project, I hand-drew a paper piano and made it interactive by connecting it to an Arduino circuit.
Here is a demo of the setup.