Researchers at Eindhoven University of Technology have recently created the world's smallest temperature sensor chip. The chip is as light as a grain of sand and is 2 millimeters square. The coolest thing about this chip is that it requires no source of power. It uses the radio waves that it uses to communicate to power itself. This technology could ultimately lead to devices which could transmit data without having to worry about batteries or physical connections.
For more info: Project PREMISS
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