Researchers Create Forearm Trackpad Tech

North Carolina State University researchers developed EpiPad, a radar-based system turning forearms into trackpads for under $10. The prototype achieves 92.8% gesture accuracy after four minutes of calibration, though loose clothing drops performance to 63.2%. Latency measures 90 milliseconds for gestures and 470 milliseconds for force detection, with the sensor sitting 14 millimeters above skin.