Hi All,
pondering away on my latest project here which is a
remote GSM based telemetry device. Got my current consumption
under control with an average of about 5ma.

So, now to how to power the thing and keep it self sufficient.

My idea at this stage is 600mAh NiMh 3.6V battery pack (as
the circuit runs at 2.7-4v) and charge this via a 6V solar
cell. (about 3-4days with no sun I hope..)

I intend to use 2 fixed resistors as a trickle / fast charge
cct, with the fast charge one switched in when battery falls
below 3v, and switch to trickle when fully charged. (fast charge
at about 60ma) also given that max charge will only be when
the solar cell gets the good sunshine (plenty of that in Aus at
the moment..)

Does this sound a feasibly plan?
Or is there a much better solution not using something complicated
like NiMh batteries?

Any thoughts much appreciated :)

Regards
Peter Mcalpine

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