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a Grade 10 student

designed a flashlight that provides bright light without batteries or moving parts

and only needs a five degree temperature difference to work and produce up to 5.4 mW at 5 foot candles of brightness

Using four Peltier tiles and the temperature difference between the palm of the hand and ambient air

bought Peltier tiles and tested them to see if they could produce sufficient power to light an LED

power was no problem but getting the needed voltage was, as the tiles did not generate enough of the voltage needed

some changes to the circuit design

used the Internet for information, experimented with different circuits

finding an energy-harvesting article

that made note of a circuit that could provide enough voltage when used with a recommended transformer

The final design included mounting the Peltiers on a hollow aluminum tube which was inserted in a larger PVC pipe with an opening that allowed ambient air to cool the tube

The palm wrapped around a cutout in the PVC pipe and warmed the tiles.

The result was a bright light at 5 degree Celcius [sic] of Peltier differential

Materials for the flashlight project cost her $26

The top winner gets a $50,000 scholarship and trip to the Galapagos Islands

The prize ceremony takes place in September. Winners will be chosen in different age categories—13-14, 15-16, 17-18.

returned with the prototype stretcher, which is fitted with carry handles, so its officers could suggest further practical improvements

idea is that the rolled-up RES could be strapped up alongside the firefighter's breathing apparatus

two-person team enter a building

the RES could be unrolled and secured around the injured person

product as far as I can as a degree project, fashioning it in the same heat resistant materials the fire services use