Powering Arduino on < 9 Volts

Is there a way to power an Arduino on ~6 volts or so (4 AA)? USB is around 5 volts so I assume you can, but I'm not sure as usually it takes 9 volts.

The chip its self takes 5 volts. Any more and the magic green smoke will escape. ;) The voltage regulator (small chip next to the power plug) accepts between 7 - 20v and outputs 5v.

6v is a little tricky because its too much for the Arduino but too little for a voltage regulator to handle.

have a look at Ladyada's Minty Boost...

D

I was thinking about this. Putting 6 volts into USB might kill it though, won't it?

I was thinking about this. Putting 6 volts into USB might kill it though, won't it?

It certainly wont like you very much. ;)

Using a low dropout regulator will work with a 6v battery. I use an [u]LF50CPT[/u] on my serial arduino running on a 6V battery (5 AAA NiMH cells) and it runs on anything over 5.5 volts.

BTW, the regulator is required as the battery voltage is well over 7 volts when fully charged.