I love the Mintyboost power supply/charger Instructables, but wanted to look for something a little readily available that doesn't see much use anymore and that was a little easier to customize. Going through a few stores of odds and ends, I came across an old cassette tape collection, and there it was! I tossed in a $1.69 Radio Shack 7805 5 volt regulator (they have virtually every type of protection built in, including thermal overload, spiking, reverse polarity, etc.), and came up with this! It's easy, fast, and a great little charger that you can use with just about any DC power source to charge your cellphone, or, with a little extra effort, your USB! A big thanks to JDurban for his advice on this project!
You couldn't ask for an easier part. It requires no additional components to work, and you only have to solder to three pins. The DC power leads attach to pins 1 and 2 (2 is the common ground for both input and output), and pins 2 and 3 for the output... what could be simpler?