Thanks, it's a nice piece of work. At the moment I use a step up booster, converting 3 AA's to 5V.
So, basically you advice to get a 5V source connected to the board. Should it be connected through the 5V pin then ?
The system doesn't have to run extreme low power, whatever it will draw, it will not be very much compared to all peripherals (leds, speaker, etc).
Cheers,
Jack