Show your hands: Smartwatches sense hand activity

We’ve become accustomed to our smartwatches and smartphones sensing what our bodies are doing, be it walking, driving or sleeping. But what about our hands? It turns out that smartwatches, with a few tweaks, can detect a surprising number of things your hands are doing, according to researchers at Carnegie Mellon University.
Source: EurekaAlert, https://www.eurekalert.org