AA Power board (v1)
The AA Power board is a small board which can generate 3.3V from a single AA battery (Alkaline or NiMh), sufficient to power a JeeNode, for example:
The board uses an ultra low-power LTC3525 boost regulator chip which draws only 7.. 30 µA in idle mode (depends on input voltage). The input can range from 1.0V to 5.5V, so this can also be used with 2x or 3x AA battery packs (even 4, if NiMh), and it will continue to work when hooked up to a 5V power supply. The regulator will work down to less than 0.5V and can squeeze the very last bit 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.
Configuration
There's one solder jumper, which can be left open in most cases. If connected, it will determine to which power source the PWR pin is attached: BAT+ (i.e. on-board battery) or +3V (i.e. output of boost regulator).
Header Pinouts
Design Info
Dimensions: 21.1 x 68 mm
CadSoft EAGLE design files: see below.
How to Get It
http://shop.jeelabs.com/products/aa-power-board
Related Weblog Posts
- 2010-09-06 - Running off a single AA battery
- 2010-09-16 - Meet the AA Power board
- 2010-09-17 - Long live the AA battery!
- 2010-09-18 - AA mounting options
- 2010-09-19 - AA power options
- 2010-09-20 - Lots of AA's
- 2011-06-20 - AA boost ripple
- 2011-06-21 - MCP1702 current draw
