Scientists have been struggling for years to create sensors that do not need their own power, because they can draw energy from the environment and thus work almost infinitely. This team of Dutch scientists seems to have achieved this because they have designed a small temperature sensor that does not need its own battery.
The invention of scientists from the Dutch Eindhoven University of Technology is as small as the grain of sand and has a surface area of just 2 mm kw. It can be applied to the wall like a paint and will monitor temperature, motion, humidity and light intensity by transferring data to a computer.
The most interesting aspect of this invention is the power issue because the device does not have its own battery, so it is equipped with a power system that uses the surrounding electromagnetic waves, including a Wi-Fi signal. Thanks to this it can practically work indefinitely.