Maybe the best thing about this DIY project is its name: the Joule Thief. It’s a tiny LED flashlight that runs off dead batteries, eking out the last drops of voltage from a dead AA and throwing them ...

Flashlights come in different shapes, sizes and with different power outputs, but even the most powerful commercial flashlights pale in comparison to this blinding contraption that was put together by ...

Whoda thunk it? Conveniently three AAA batteries fit perfectly into a Tic-Tac casing. Add in a switch, resistor and an ultra-bright LED for a nice, small flashlight. Follow the linkage for the easy ...