New tech turns your arm into a smart watch touchpad

A lot of people like the idea of a smart watch but don't like having to use a tiny touch screen.

Big fingers and a tiny screen can lead to frustration and errant screen commands.

Researchers at Carnegie Mellon University have developed a wearable technology that enables users to turn the skin on their lower arm into a touchpad, giving them a bigger surface to input information or commands to their smart watch.

Unlike other solutions that have used flexible overlays or a combination of a projector and camera, the researchers' new technology, called SkinTrack, only requires the user to wear a special ring that produces a low-energy, high-frequency signal through the skin when a finger touches or nears the skin surface.

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