Image courtesy of Adafruit

A 5V linear regulator can be used to generate a stable 5V supply voltage from a higher input voltage. Always be sure to use decoupling capacitors with your linear regulators – the datasheet specifies good values to use.

Download the L7805CV Datasheet (PDF)

Buy an L7805CV 5V Regulator from Amazon, SparkFun, or Adafruit.