How to Build a 9v Battery Powered USB Charger

Written on October 28, 2009 – 10:52 am | by | 65 views |

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Battery powered USB chargers are pretty cheap at Amazon and other places, but as with everything else it’s always more fun to make your own. The basic concept of a USB charger is actually pretty simple, and you don’t really need more than a couple of very cheap components to make one yourself.

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How to Build a 9v Battery Powered USB Charger

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