Cut a piece of foam packing and put in the pen's tipSources available at github:https://github.com/Obijuan/3D-parts/tree/master/touch-penMore information (In Spanish):http://www.iearobotics.com/wiki/index.php?title=L%C3%A1piz_t%C3%A1ctil
Juan Gonzalez-Gomez (Obijuan) I am a researcher on robotics, but I define myself as a hacker. I really believe on the opensource spirit of sharing information