hi,

i've got a small datalogger based on a 12C672 and a 24LC128 that i supply 5V
via a 9V battery through a 7805(1A) regulator.  The pic wakes up every 1.5
minutes, records a single datapoint, then goes back to sleep.

my problem is that the new 9V battery runs out ~7 days (7000 datapoints) and
i believe its because of the regulator- my circuit only uses ~33mA (as close
as i can tell) maximum, and it is sleeping most of the time.  first
question: is this typical life for a 9V battery, or could it be the
regulator or something else?

does anyone out there have a small inexpensive 5V regulator they can
suggest?  i'd like to stick with the 9V battery due to size issues...

the lower the parasitic losses the better- i'd like to be able to at least
fill up the 16K of memory i have available!

any inputs or help are greatly appreciated

regards
Pat