Friends! Well, by such a find I could not pass by. Of course in our time it can be relevant, but it must be tinked, and probably there is a result ....
From the author: in conflict or crisis, electricity will be turned off. How to charge the radio or to illuminate the room where she hid? Below you will find an easy way to produce electricity.
You will need:
Galvanized plate (ideally - zinc).
Copper wire.
Toilet paper (or thin matter).
Salt.
Water.
Manufacturing process:
1. Plate we cut into smaller pieces.
2. Wash the paper layer (or matter) on the plates, over the layer of copper wire, over the layer of paper.
3. We fasten the elements with tape, threads or scotch.
4. We connect the elements sequentially and wetted with salted water.
To power the LED, enough 7 elements. To charge the phone, 13 elements were used (at the output 4. 4 V.
The battery will work until the paper is dry or until the entire zinc is connected. Thus, if the elements dry, they must be mixed with water, and everything will work again!
If someone from you friends have already done such homemade, I look forward to your feedback.
A source