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| Girl invented flash light |
A 15-year-old girl in Canada has invented a Flashlight which needs only the warmth of the hand to
turn on.
This
is a great achievement that without using the battery, only with the help of
warmness in the body made the torch to lighten which saves the electricity.
The girl is none other
than Ann Makosinski, a high school junior in Victoria, British Columbia, was trying
to think of a way of harvesting untapped energy when she was inspired to make
the flashlight.
She realized that the
warmth generated by the human body was an overlooked energy source.
Her project objective
was to create a flashlight that ran solely off the heat of the hand.
That objective was
accomplished when she discovered Peltier tiles, which produce electricity when
one side of the tile is heated and the other is cooled.
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| Flash light |
An official said that Power Africa is Obama's
clearest attempt to launch his own legacy-making initiative. The White House
said six countries will participate in its first phase: Ethiopia, Ghana, Kenya,
Liberia, Nigeria and Tanzania. Those nations have committed to making energy
sector reforms that will encourage outside investment.
Makosinski realized she could use these tiles to
create energy for her flashlight if she left the device hollow.
Holding the flashlight
on the outside would cause the tiles to heat up on one side while the
ambient air would cool down the tile on the inside of the flashlight.
The power created by
the tiles was enough to power an LED light, but it did not create enough
voltage.
To troubleshoot that
issue she created a circuit that would allow for transformers, upping the
voltage.
It worked! The
flashlight does have one issue: it works better in colder temperatures since
the inside is better able to cool down comparative to the person's body heat.
Seven private companies have agreed to invest in
improving and expanding the power grid. Those investors include General
Electric, which will bring 5,000 megawatts online in Tanzania and Ghana, and
Heirs Holdings, which has promised $2.5 billion of investment and financing in
energy, according to the White House.