Versatile, Low-Cost Interface Device for Keyboard and Mouse Emulation

This paper presents the design and fabrication of a versatile, low-cost interface device capable of emulating both keyboards and mice. The device is based on various types of buttons, including capacitive and mechanical ones, which can be constructed using low-cost materials such as laser-cut acrylic sheets and aluminum foil or 3D-printed using conductive PLA. A key feature of this work is the web-based configuration tool that allows users to assign different functionalities to each button. For example, buttons can be used as keyboard shortcuts, creating a switchboard where each button is linked to a specific application shortcut, enabling full control over that application. The simplicity, versatility, and affordability of both the buttons and the electronics make this device an accessible solution for individuals with motor disabilities, offering a highly adaptable platform for various use cases.