This dataset and manuscript present a theoretical framework for transforming passive projection surfaces into active, touch-sensitive interfaces using localized electrical field modulation. The approach integrates optical projection with a low-intensity electromagnetic layer, enabling detection of user interactions via bio-capacitance without requiring physical substrates or complex infrared arrays. The model outlines the system architecture, signal feedback logic, and interaction mapping, providing a foundation for next-generation Human-Machine Interfaces (HMIs). Future experimental studies are suggested to validate sensitivity, accuracy, and environmental robustness across various surface materials.