Abstract
We propose a new type of haptic actuator, which we call MagnetIO, that is comprised of two parts: any number of soft interactive patches that can be applied anywhere and one battery-powered voice-coil worn on the user’s fingernail. When the fingernail-worn device contacts any of the interactive patches it detects its magnetic signature and makes the patch vibrate. To allow these otherwise passive patches to vibrate, we make them from silicone with regions doped with neodymium powder, resulting in soft and stretchable magnets. This novel decoupling of traditional vibration motors allows users to add interactive patches to their surroundings by attaching them to walls, objects or even other devices or appliances without instrumenting the object with electronics.