Most likely a dumb question but,
If I were to make a bare bones setup could I supply power to the atmega168 with only two or three 1.5v batteries or three 1.2v rechargeables? Would I even need filtering caps or a diode?
I know the operating voltages of the atmega168 is 2.7v to 5.5v per the data sheet however I have no idea how smooth or stable dc current from a battery is.
P.S. I typically use a 7805 voltage regulator, caps, and a diode however I am trying to reduce both size and power consumption of a couple of smaller projects.
Thanks for your time.