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.
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It all started long ago, with one of the publications in the journal "modelist-Konstruktor" No. 5 of 1981, a binder which we keep, and from time to time viewed. In the article it was...
