Would this circuit work for a basic solar USB charger?
So i'm making this solar powered usb charger, but i don't know too much about circuitry. I was reading around and drew a circuit in mspaint : http://img12.imageshack.us/img12/5403/circuitr.jpg. I'm just asking if this would work to charge the usb and the batteries(then the batteries charge the usb with no light). I also know that i need two diodes, one to prevent the batteries from discharging, and one to regulate voltage for the usb connection, could someone point out which these are?
I'm using this solar panel: http://www.dealextreme.com/details.dx/sku.17439
But dealextreme has sketchy quality stuff, anyone know a safer place to buy a solar panel of like specs? Like amazon? or Radio Shack?
After further inspection i realized that the black cord of a usb cable is ground. I'm not sure if that's right. How would the connection to the USB work?