MAKE Flickr Pool member Funax made an Arduino-compatible board powered by a single AAA battery.
A step-up converter is used to boost the battery’s 1.5V output to 5V and meet Arduino’s minimum power requirements. Keep in mind – this circuit would considerably reduce current supplied to the board and therefore limit its ability to power external components.
AAArduino on Flickr- Link
Learn more about DC-DC converters on Jaycar.com – Link
Related:
Uduino – Low cost Arduino development boardLink
Arduino @ MAKE – Link
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