
EpiPad Uses Radar to Turn Your Forearm into a Smartwatch Trackpad
An innovation developed by researchers at North Carolina State University turns the human forearm into an interactive trackpad for wearable devices. The system, called EpiPad, uses a millimeter-wave radar sensor to track finger motions and skin pressing firmness directly on the wearer's arm. Presented at the UbiComp/ISWC 2026 conference in Shanghai, the setup allows users to tap, pinch and zoom without obscuring compact displays.
















