I thought you guys might like to see this boost circuit. 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 for all sorts of different things.
https://hackaday.io/project/7050-boosti … ge-booster
https://cdn.hackaday.io/images/153671456157236370.JPG
