I have a project I want to squeeze into a small space. In order to save space, it is proving useful to 'hand craft' something like a bare bones board.
It would be useful to not use a voltage regulator, and wire the batteries (AAA's) directly to the chip. AVR's seem pretty tolerant, and anything from around 3.3v - 5v seems to be enough to get the chip to work. Plus, v. regs are a little lossy, and this shortens battery life.
Is this a dumb idea? What do I lose out by scrapping the voltage regulator?