> I'm not an electronics
> expert but I suspect that this current is too high when the cells are full
> charged and a regulator will be mandatory (or I'm wrong?).
> I have read on PICList a lot of e-mails about a solar-charging system some
> days ago, but it seems a bit excessive for my use.
> Can anyone suggest me a simple and rugged solution for regulator?

You don't need a regulator, the batteries will do that for you.  I would
arrange enough solar cells in series to get sufficient voltage to charge the
batteries directly, and use an LF PIC that can tolerate a wide supply range.
The batteries will have much less impedence than the solar cells, so they
will automatically clamp the voltage.


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

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