I first got the idea when making the Solar PSP charger from Yo Chuck's Instructable.(http://www.instructables.com/id/Solar_Rechargeable_Battery_Powered_PSP_Charger/
).My Battery pack or solar cell did not fit in the altoids can very well so I decided I would make my own off of the idea. Yo chucks is more portable as it will easily fit in your pocket, but this will provide more charge time and being able to charge your batteries and the PSP at the same time.
Step 1: Getting Your Materials
First, obviously, you will need all your materials. It is much easier to make your charger, as well as possibly improving on the idea yourself, if you have everything you need laid out in front of you.
You can get most if not all of what you need at Radioshack or comparable electronics stores.
You will need:
(1x) Medium sized project box (Catalog #:270-1806)
(2x) Battery Packs(without on/off switch) (Catalog #: 270-391)
(2x) DPDT mini-switch (Catalog #: 275-626) Make sure this is an ON-Off-ON
(1x) Solar Cell(6v 50 mAH)(Catalog #: 277-1205) This part is more expensive, if you have smaller ones, put them together to get about the same, the higher the amps the faster the batteries will charge but do not go too high obviously.
(1x) LED. This part you can get by itself, in a multi-pack, or with a built in resistor. I used one with a built in resistor to simplify the wiring. If you do, do not put the resistor showed in the diagram into the wiring) (Catalog #: 276-270)
(1x) 150 Ohm Resistor. You ONLY NEED THIS if you do not get an LED with a built in resistor.
(1x) Rectifying Diode(the smallest they have will do fine)
(1x) PSP Charger. If you have an extra use it, if not you can pick one up pretty cheap.
(8x) Rechargable AA batteries.
You will also need the following tools:
Wire... A few feet will be fine, this is just to make your connections with the existing wires.
HeatShrink(not needed but I used for good measure)
Hot Glue Gun w/ Hot glue.
Drill with bits(1/4 inch bit)