The SawStop

sawstopA new system for circular saws called the SawStop that can detect contact with skin in about 5 milliseconds and automatically stop the blade, thus preventing your own accidental mutilation. How does it work? By recognizing the differences between the electrical properties of wood and the human body; any change in the electrical signal and the blade shuts down immediately. Make sure you check out the video.

[Via BoingBoing]