9v battery charger - need help

Archiver

I need to charge a 9v nimh battery in my robot.
Written on the battery is "charge at 15mA for 14 hours"
It does not say what voltage to use. 9v? 12v?
Anyone have schematics for a 9v battery charger ?
how do I setup a current limiting circuit without knowing the
battery load ?
Thanks,
Shachar Weis

Archiver

Perhaps it would be prudent to follow the manufacturers suggestion.

I have found the LM317 IC to be useful as a current regulating charger.
Most datasheets available at suppliers like DigiKey will suggest various
circuit configurations.

Good luck

"holopoint.rm " wrote:
>
> I need to charge a 9v nimh battery in my robot.
> Written on the battery is "charge at 15mA for 14 hours"
> It does not say what voltage to use. 9v? 12v?
> Anyone have schematics for a 9v battery charger ?
> how do I setup a current limiting circuit without knowing the
> battery load ?
> Thanks,
> Shachar Weis
>
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