For a science competition at school, I made a solar powered phone charger which fully works. Currently only compatible for Android. The items need are:
-2 Solar Panels... I used these http://m.ebay.co.uk/itm/350909292464?nav=SEARCH
-Access to a laser cutter to build the wooden frame
-A Soldering Iron and solder
-A mini Compass
-Micro USB cable
-Crocodile Clips (not needed if they come attached to the solar panel).
Step by Step instructable coming soon!
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Participated in the
Explore Science Contest