These nifty little devices will allow you to pull power easily from a USB port!
Handy way to add a USB Micro connector to any project! These boards breakout all 5 pins of the Micro USB connector and are breadboard friendly.
Note: There are methods to trick the USB port to supply more power than default. If you are looking for more than 100mA, try this..
Most USB Chargers will supply 500mA easily.