We ve already shown you mintyboost a battery powered usb charger built from an altoids tin.
How to make a solar panel charger for ipod.
I love my iphone 4 to death.
Even if it sucks juice faster than a 1st grader at snack time and i often find myself on low power with a long train ride ahead of me.
According the chart below the 5 volt output from the lm317t should be connected to pin 1 and the ground negative connected to pin 4.
Now feast your eyes on mightymintyboost a rechargeable solar powered mintyboost charger.
Using a slightly larger solar cell 6v 250mah you can generate enough power to fully charge an iphone in about 5 5 hours and an ipod touch in 4 hours.
I originally made my altoids usb charger to use with my iphone only.
Simply connect the red usb cable wire to the 5v positive output from the lm317t and the black usb cable wire to the ground negative.