Solar power mobile phone Charger
Linear tech article discussing solar charging, using optimum power monitoring - see extracts
The idea goes back to 2002 once I had been focusing on my dissertation on ways of energy scavenging that could be integrated on silicon. On a footnote, I added easy computations demonstrating that when the surface area of a 'candy club' mobile phone is covered with solar cell of 5per cent performance (that is pretty standard), including a DC/DC converter, the overall production energy is sufficient to enhance battery pack, providing energy for stand-by indefinitely.
And right here it is! Or in other words a simplified version which equally effective if not better!
Specifically the thing you need:
The Motorola F3 - a tremendously inexpensive (I believe the lowest priced mobile there is) phone this is certainly accessible in both US and British. It is this affordability and fundamental ruggedness that I had selected this model. More about this later on...
a solar panel - usually the one I'd acquired is available on the web (more on this later on) but other appropriate make can be utilized offered its rated 4.5V and above, getting the measurement perhaps not larger than 100mm x 40mm.
A Schottky diode, 1N5817 or comparable - a simple component which is not hard to get, you can also utilize the SMT version as long as you can solder some cables on both finishes.
Some cables, I use enameled line, more on this later...
Some basic soldering + a sharp pen blade + aluminium tape + epoxy + a hand-drill + very glue