Here's another device that's bound to be useful once you finish making it. This is a powerful charger you can use for a camera, cell phone, mp3 player, or any other gadget that uses a USB port to charge.

What's so great about this USB charger, you ask? It's powered by two AA batteries, which, according to tests, is more powerful that a 9V USB charger.

This USB charger is easy to make. You'll need an Altoids gum tin which will act as the case, and some soldering tools that will help when you build your circuit board and breadboard.

The complete instructions on how to make this battery-powered USB charger can be found by clicking on the link.