Re: Another Novice Q. - recharging - Volts and Amps

ehsjr <e.h.s.j.r.removethespampunctuation@xxxxxxxxxxxxxxxx> wrote in
8vU8k.58$BR.4@trnddc06:">news:8vU8k.58$BR.4@trnddc06:

Kris Krieger wrote:
ehsjr <e.h.s.j.r.removethespampunctuation@xxxxxxxxxxxxxxxx> wrote in
u3E8k.54$WJ.12@trnddc04:">news:u3E8k.54$WJ.12@trnddc04:

[edited]


Only *after* I know all that, can I select the specific cells, and
configuration therof...

- Kris

As you said, you are working backwards. You don't yet understand
that doing it that way can result in a specification for cells
that are "unobtanium".

Ed


"Unobtanium"??, it's a modest LED night-lamp, not an airport beacon :p

I *already* know the batteries and their output, and the input needed by
the LED driver and what it will output to run the LEDs (which will run off
the batteries at night) - those are not the problem.

To charge my 4 little 1.2V AA NiMH batteries, I have seen the following
solar cells (and more, this isn't an all-inclusive list):
0.5V, 200mA
0.5V, 450mA
0.5V, 800mA
0.5V, 2000mA
1V, 200mA
2V, 200mA
3V, 400mA
4V, 25mA
etc.

I also know that, depending upon how I connect cells, I can up the Volts or
up the Amps, or both if it's a series-parellel combination. The biggest Q.
is the volts. I read that, using a 5V solar cell, charging time would be
the battery mA divided by the cell mA, but what if it was a 2V cell, or a
..5V cell?

Well, I'll write to Maxim, since it's their components I'm interested in.
They can prob. best tell me the input I need for the battery-management IC.

- Kris









.

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