NCP1402-3.3V Step-Up Breakout
Cost: $5.95 each
Description: The NCP1402 is a 3.3V DC-DC converter. The breakout board will accept voltage inputs between 1 and 3 Volts (such as 1 or 2 AA batteries) and output a constant, low ripple 3.3V output capable of sourcing up to 200 mA. This board is great for supplying power to 3.3V sensors or providing 3.3V from a a single AA battery.
The breakout board includes the necessary peripheral components. The input, output and ground pins are broken out on a 0.1" grid to allow easy access on a breadboard.