Introduction: 5 V Smartphone Solar/Battery Charger
parts u'll need :
-USB extention cable
-battery holder for 4 AA batteries
8V Solar panel with less then 200 mA
2 5V (or higher) diods
tools u'll need:
hot glue gun
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cut the USB extension cable in two and isolate the wires from each other
solder one diod to the red wire so no electricity can pass from the USB side of the cable
solder the green and white wire together and isolate em with some tape
solder the negativ side of the battery pack to the black USB wire and the red one to the positiv side
solder the second diod to the red wire so no electricity can pass from the battery to the solar panel
make a knot in the Usb wire and cut a hole in the side of the plastic cable, and another one in the top of the casing.
solder the negativ side of the solar panel to the black wire and the positiv to the diod on the red cable
glue the solar panel on top odf the box and lead the cables through the hole u cut before
and ur done :)