In this instructable I will show you how to make a solar powered USB charger for your phone or mp3 player. This is item is great because it doesn't always have to be sunny for you to charge you phone or other USB device. The way the circuit is designed lets the solar panel be constantly charging the batteries and by flipping the switch the batteries start to charge your USB powered device.
Hope you like it.
Step 1: Supplies
6 volt Solar Panel
4 AA Battery holder
4 AA Rechargeable Batteries
2 diodes (I used 1n4007 but any will work)
Solder and soldering iron (optional)
2 100 Ohm resistors (only for apple devices)
Heat Shrink (optional)
You can find all of these parts at your local Radio shack. Lets start making it.