The Nano-BRK is the first public release board I have for the Arduino's. This board is very small and has several power options for the header-pins. I wanted a board that broke out all the pins in servo header style that could externally power things like servo motors or other higher current/voltage items.

The board can be powered with a 5v regulator on the PCB itself or without. To use without, you will need to solder the jumper pads below the regulator between the two filter-caps. For the headers, you can choose to power with the onboard regulator by soldering the jumper next to the Vin pin. If you want to use external power for the headers, use the jumper pins near C1 and jumper top left to right. If power will be from an external regulator, that will also power the Nano, jumper from top to bottom on the right side of the header. 

Go to https://github.com/jscottb/pcbs for other free Gerber files!