Russell McMahon wrote:
 >Vasile Surducan wrote:
>> Well, like many of us I've built a NIMH smart analyzer (charger
>> discharger -PC analyzer, etc).
>> Then I found a chinese universal NIMH-LI-ion-Li-polimer etc charger
>> for every battery size (there is a mobile-adjustable contact on the
>> charger) for just 2.5 euro and decide than never build again a
>> charger...
> =

> Where do I but such a bargain from ? =


I'll bet it's just a transformer and a resistor - simple constant current c=
harger.

I actually picked up a pack of the Energizer 2500mAh AAs from Maplin the ot=
her =

day - mainly because they appear to be Sanyo rebrands ("HR" stamped on the =

negative contact plate and "Made in Japan" on the label). They were =A39.99=
 for =

four, or =A319.99 with the charger. The charger itself looked fairly well m=
ade - =

shame the charge rate was locked at 2A. I've got some Kodak 1600mAh AAs =

(suspected to be Sanyo rebrands for the same reasons as the Energisers) and =

I've yet to find a charger that will work properly with them...

I've had chargers that cut off too early (poor quality voltage-delta detect=
ion =

circuitry), one that had a pass transistor short out (16V and 4A over the =

cells - ruined my only set of Sanyo-branded AAs), and a few that just plain =

didn't work.

I actually wanted to build a "reflex mode" charger, but it was too much lik=
e =

hard work. Switchmode constant-current is so much easier, and I can't find =
any =

positive evidence that reflex charging has any benefit. Come to think of it=
, I =

couldn't find anything that said it was a bad idea either...

I think I need to try and get a few 16F683s and the ICD header to play with=
. =

Seems they'd be perfect for driving the SMPSU. I would have used an 18F1320=
, =

but all mine are of the 'won't execute code worth a damn' variety... Half a =

dozen of them - that'll teach me to read the errata before I buy any more P=
ICs...

Thanks.
-- =

Phil.                         | Kitsune: Acorn RiscPC SA202 64M+6G ViewFind=
er
philpem@dsl.pipex.com         | Cheetah: Athlon64 3200+ A8VDeluxeV2 512M+10=
0G
http://www.philpem.me.uk/     | Tiger: Toshiba SatPro4600 Celeron700 256M+4=
0G
-- =

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