Flashlight-impromptu can be made from storage battery and a bright led. The battery is installed between the findings of the led, observing polarity, and fasten a large sandbox or plastic a paperclip. The latter is covered by a layer of plastic, does not conduct current, so the short circuit using a paperclip is not going to happen.
Recommend to read
THE MOTOCROSS TRACK WITH GOLOPRISTAN
The original self-similar route, combining elements of technical creativity, sports competitions and physical training, developed a young technology of the German Democratic Republic....
ON THE BED – THE STAIRS
Well adults: they do not rise from their beds. And the kids? To change them like clothes with shoes, each year at most? Here and thrown into the yards of the old cots. But they can be...
