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'Thnx for the Ni-cad help'
1996\12\30@163741 by Xaq

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Well after reading every ones replies, I figured I just needed MORE
VOLTAGE! So I cranked up my power supply until I saw 220mA.  I will just
check the current every once in a while and turn the voltage up when it
starts to drop.  Basically making me the "constant current source."  I have
been charging them for about an hour, and they haven't  exploded yet, so I
think I'm alright.

Thanks for your help,

Zach

P.S.  Yes, I did mean 2200mAh ; )

1996\12\31@011533 by William Chops Westfield

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   Well after reading every ones replies, I figured I just needed MORE
   VOLTAGE! So I cranked up my power supply until I saw 220mA.

I must admit that I (also?) use a "lab" CCCV power supply for charging
random NiCads.  So for "only" about $200 or so, I have a supply that
will charge just about anything at the C/10 rate, and I can manually
fiddle with it to provide a higher start current, as well as charge up
big caps or use extra-high currents for burning off the shorts in "dead"
nicads...  With nicads being "hazardous waste", and good sized business
is a fine source of "dead" nicad battery packs (via recylce containers)
where the usual failure mode is a single bad cell (that was overly
"reverse charged") rip 'em apart for a swell source of "mostly ok" nicad
cells...

I'd really like to build a nice gadget with microprocessor and A/D
converter and a couple of small adjustable current power supplies.
You'd plug in a bunch of cells, and over the next 24 hours or so it
would figure out which ones were OK, which ones were dead, and
approximately what the AH rating of each cell was.  Seems like a lot of
effort and expense to aid dumpster diving.

BillW

1996\12\31@130811 by David Schmidt

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Yes, but it would be extremely popular with all of us hardware
guys that have this huge collection of secondary batteries lying around
and keep forgetting to keep them topped up!  It's a zoo around my
house every Halloween - trying to get all my batteries charged for
all my 'effects'.  Your idea has been my idea for the past 8 years!
Work really gets in the way of projects that you REALLY want to do!
Dave

>I'd really like to build a nice gadget with microprocessor and A/D
>converter and a couple of small adjustable current power supplies.
>You'd plug in a bunch of cells, and over the next 24 hours or so it
>would figure out which ones were OK, which ones were dead, and
>approximately what the AH rating of each cell was.  Seems like a lot of
>effort and expense to aid dumpster diving.
>
>BillW
>
>


'Thnx for the Ni-cad help'
1997\01\02@122023 by David Peter
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Great idea!  I have some microcontollers with A/D and a development kit
( C and assembly ).  Not knowing to much about the batteries I would need
some help there. But it sounds like a fun project. I'm willing to
participate.

David

1997\01\03@100644 by Lauw Lim Un Tung
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hi,
you can charged NiCd like these:

                            ( )
 110V AC   ------------------V-------------I>I--------  +     -  ---;
or 220V AC            110V/220V lamp     IN4001       series NiCd   ;
           ---------------------------------------------------------;

for lower current you can used 5 W lamp, or 10 W for the higher current.
if you used 60 W, you must be carefull!! Also this is high voltage!!



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       Lauw Lim Un Tung
       Pecindilan 5/14
       Surabaya 60273
         INDONESIA
phone  : 62-31-318895
e-mail : spam_OUTtungTakeThisOuTspampeter.petra.ac.id
_______________________________

On Mon, 30 Dec 1996, Xaq wrote:

{Quote hidden}

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