by Joshua Zimmerman, Instructables:
Step 1: What You Need
Cost is less than $30. I can make one for under $10 when I buy parts in bulk. I have a kit available at my website BrownDogGadgets.com which has everything you need to make this project. Also, if you’re lazy, I do sell made versions in a variety of tin styles.
The central brain of our project is a DC to USB converter circuit. This takes our AA power and changes it into the 5Vs we need for charging USB. There are several ways of doing this.
1) You can make one yourself using Lady Ada’s Minty Boost kit. It’s $20 and requires soldering. It also charges almost every gadget under the sun, including new Apple Products.
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