AA Power board
Get clean 3.3V regulated power from a single AA battery!
The AA Power board is a neat board for generating 3.3V from a single AA battery (Alkaline or NiMh), sufficient to power a JeeNode, for example.
The board uses a wide input range LTC3525 boost regulator chip which draws only 7.. 30 µA of current in idle mode (depending on input voltage). The input can be anything from 1.0 to 5.5V, so this can also be used with 2x or 3x AA battery packs (even 4, if NiMh). It will work when hooked up to a ~5V power supply. (Caution: check the supply 'no load' voltage stays below 5.5V). The regulator will keep working down to less than ~0.9V and can squeeze almost the last scrap of energy from the battery.
The board was specifically designed for use with a JeeNode with several different mounting options, but can be used with anything that needs 3.3V. An AA or AAA cell can be mounted directly onto the board. The maximum output current is 60..150 mA, depending on input voltage.
The Pre-assembled version contains all the parts needed to create a working power supply, including AA battery clips and the 6pin header + pins to solder on for connecting it to a JeeNode in three different ways. The (tiny) SMD parts are already soldered onto the board.
The PCB only version contains just the board. No parts, no headers.
The documentation and full design details are freely available.
A 5.0V version of this board is available from Modern Device, same board, same circuit, different LTC3525 chip.