> Jinx the battery is Kodak Photolife KL2CR5.  I did a 150mA over
> night test and I got a capacity to 5V of about 1.2AH although the
> manufacturer says 3AH (according to my boss)
>
> Olin Lathrop wrote:
> >By the way, 290uA for 5 years comes out to 12.7 Amp-hours, and
> >doesn't take into account battery self discharge or shelf life.
> >That's a pretty beafy battery, although I'm not that familiar with
> >what's available in lithium cells.
>
> Oops, sorry the final version won't be 290uA I had the infrared
> gates pulsed outside my read the ports instructions.  I can fine
> tune the circuit to have the pulses much shorter.

OK, so let's work it backwards.  3AH spread over 5 years comes out to 68uA
average, again not taking shelf life and self discharge into account.

How often does this thing need to dispense a stoat snack?


********************************************************************
Olin Lathrop, embedded systems consultant in Littleton Massachusetts
(978) 742-9014, olin@embedinc.com, http://www.embedinc.com

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