Capacitive sensing isn’t limited to your smartphone. In fact, you can use contact with human skin (or any other conductive surface) to trigger almost any circuit. And the Touch Board from Bare Conductive wants you to combine your DIY spirit with the ability to turn practically any surface into a sensor. At the heart is an Arduino compatible microcontroller (based on the Leonardo) with a few extras baked in, including a Freescale touch sensor connected to 12 electrodes and an audio processor for triggering MIDI sounds or MP3 files. While you can simply trigger the electrodes by touching them or connecting them to any conductive material, such as a wire, the Electric Paint Pen really opens up the input possibilities. It’s just like a paint marker, often used for small scale graffiti, except it spits out conductive black ink that can turn a wall, a piece of paper or almost anything else into a trigger. In fact, it
‘s preloaded with a bunch of sample sounds on a microSD card so that you can simply paint a soundboard out of the box.