I hope you found this project useful. I do have a couple of caveats to throw out there, though.
Remember, this circuit was engineered to supply 5V to charge a cell phone. Most cell phones can charge at a low rate and at a high rate due to the fact that they are charged by USB.
Basic USB 2.0 standards say that a device will be current-limited to 100mA unless a higher current is negotiated, in which case a maximum current of 500mA can be offered.
Why is this important? Well, I guess there’s really no way to tell if this circuit can handle 100mA, 500mA, or more. In my case, the markings on the chip were removed, so I was unable to look up any concrete information on it.
I guess what I’m saying is to be careful with it. It’ll likely power your AVRs, PICs, Arduinos, etc., but I wouldn’t try to run motors off it, or large LED arrays, etc.
For more information on this, visit my blog at: Ramblings of an E-Geek