For $1, you can build a device that uses TV signals to recognize gestures


There’s energy all around us in the form of TV, radio and WiFi signals. Develop a device that doesn’t need much power, and you can harvest enough power from thin air to cut out the need for a battery entirely.

University of Washington researchers have found some interesting applications for this like communication between devices and using WiFi to detect motion. Their latest effort powers a gesture recognition device with TV signals, with the added benefit that the device costs less than $1 to make.

Known as the AllSee, the device is a tiny quarter-sized sensor that can be paired with existing tech to create a gesture-based user interface. Like using a Leap Motion, you can wave, push or close your hand in the air in front of the AllSee to communicate with a computer, robot or other tech in different ways.

The sensor also uses TV signals to…

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