I thought you guys might like to see it. It takes a single AA and boosts it to 3.3 V or 5 V for prototyping. It plugs right into an Arduino or a breadboard or perfboard. I have ended up using it all the time.
https://hackaday.io/project/7050-boostick-small-aa-voltage-booster
https://hackaday.io/project/7050-boostick-small-aa-voltage-booster