We have seen kinetic, solar and wind powered flashlights and now we have another curious one – a flashlight that runs on the human body’s warmth. Leave it to the genius of a 15 year old student named Ann Makosinski of Canada’s St. Michaels University School who came up with this flashlight.
The said flashlight is solely powered by the heat coming from a human hand.
Makosinski was able to do it by using the idea of Peltier tiles, which are devices that create energy when one side is heated while the other side is cooled.
By combining them, the result was enough power that provided enough voltage to power up the Hollow Flashlight. On the inside, you will find nothing but air hence all you have to do to get it to work is well, wrap your hand around it.