PressurePen is a pressure sensitive stylus for iPad and Android tablets. Unlike a typical stylus, it communicates how hard the user is pressing on the screen with the tablet via a standard audio jack. With software support, a light press can render as a fine line, while a stronger press will become a wide stroke. PressurePen is an open source hardware project funded, in part, by Kickstarter backers. Original concept and implementation by Charles Mangin of Option8, LLC. 3D and PCB design by Robert Shanks of Gamil Design. PressurePen utilizes the MicroStylus Jack by Acme Mobile Products. See the About page for more details.