Re: life span durable ground based 'satellite' device.


alphacentauri@xxxxxxxxxxxx wrote:
I'm developing an electronic device in order to collect and store a
wide range of sensory (imagery, sound) data of an outdoor environment

Everyday, for only a short period of time (a few seconds) it starts up
to collect the sensory the readings, which, to my latest estimates,
will take no more than 5 watts of power.


Okay, so you have something like a video camera that runs for a few
seconds every day, drawing about 5 watts of power. That sounds about
right for a video camera.

5 watts for say ten seconds is not much power. You'd need a whole lot
less than a square meter of solar panel-- that size panel will give you
about 15 watts over 24 hours. You only need it for about 1/8000 of the
time, so your solar panel needs to be on the order of a few square
centimeters. Make it four times larger to handle dirt and cloudy days
and degradation, and you're still only talking about 4x4 cm of solar
panel charging a battery about the size of a pack of cigarettes
(filtered).

.

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