Update: This kind of chargers are only useful for travelers who like camping and being lost in the bush for long periods. Recently we saw how we could load the Nokia N95 with your computer and other devices with USB A female. This phone uses the battery rather eagerly, and I fancy to manufacture a solar charger that I can come in handy for the hardships and summer evenings with mobile browsing using the handy ultra-compact bluetooth keyboard. And in an ecological, oye! A year ago I bought a pair of solar beacons (9 pcs.) With the idea of doing something fun with his cells have always fascinated me. I recently read an entry in Paradise in my apartment, which encouraged me to use them. He was among use to recharge the batteries of the bike that I use in winter or recharge your mobile phone and I opted for the latter. Finally, the presentations and let us begin. Cost: 20 or less. Difficulty: Requires basic knowledge of electricity and welding. Result: A great satisfaction and a charger for all types of devices that are loaded when connecting to computers (phones, PSP, etc). 1. Get the photovoltaic cell This is the hardest part, because we have to get a cell with sunlight from a high of 7.5 volts and a minimum of 50 mA. And usually to obtain the cheapest way is to take from the decorative night lights that normally sell in malls or stores around 1 for 10 . Choose from those usually come with a pair of rechargeable batteries of 1.2 V to ensure that the cell included is effective enough. They also sell very cheap Internet loose in digishop for example, but is in Chile … Usually the larger the cell, it is more potent ( mA) and more expensive, but also not trust too much on its size because it depends on their quality and the actual surface of the silicon cell. The voltage does not depend on its surface, but the number of cells connected in series to bring. These beacons have a photocell, a low-power LED and a pair of rechargeable NiCd batteries (which have the particularity of not aging as NiMH when loaded at low intensity).A circuit with a cell that senses whether photosensible light recharges the batteries by day and by night the LED lights. The photocells are like those of this web sales to wholesalers (click).
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