Revolutionary Miniscule Windmills to Recharge Cell phones
20 Mar
Researchers at the university of Texas have
come up with a revolutionary windmill with a generator that can charge mobile
devices very easily. What’s more interesting is the size of the device-so
miniscule that about 10 of such devices can easily fit in a space needed to fit
a single grain of rice. Technically speaking, the device is so small that
it measures about 1.8 mm at its widest point.
The device incorporates the use of grippers,
pop-up switches, inductors and gears- all as tiny as a fraction of the diameter
of a human hair.
The design credits to two fellow researchers-
J.-C. Chiao, an electronic engineering professor and Smitha Rao, a research
associate at the Texas University.
The tiny size of the device can allow hundreds
of them to be mounted on a cell phone sleeve to recharge the phone. Once the
user puts the sleeve on the phone, it simply has to be waved in air or be kept
in a windy place. Once in contact with wind, the pressure of wind would propel
and turn the tiny blades of the device, allowing the micro generator in it to
produce electricity.
The design of the device takes inspiration from
origami concepts, blended with the conventional lay-out of wafer-scale
semiconductor devices.
The nickel alloy used in the device is flexible
and the design is such that it requires minimal efforts for functioning,
combined with each other, these two points have helped in making the device more
effective.
The devices were successfully tested in Chiao's
lab in September 2013 and it was found that even under strong artificial winds,
the device suffered no fractures in the material and worked
smoothly.
The device can be made in bulk using batch
processes and so, the price for fabricating a single unit of it will be same as
that for fabricating hundreds and thousands of it.
Because of the small power, flat panels with
thousands of such devices can be installed in residential areas and allow for
the production of cheaper, safer and good amount of electricity that can be used
for many purposes.
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