dolcevita:
3xAA alkaline 3 x 1.5 = 4.5V not enought too
I built a little demo with a Mega, a Leonardo two servos and some LEDs all working directly from 3 x alkaline cells.
If you use an Atmega 328 chip on a breadboard it will happily run from 2xAA cells. I have never tried a servo with 3v but I think you can get some low-voltage devices.
...R