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[DPRG] Re: Lego Mindstorms with a 9 Volt Battery

Subject: [DPRG] Re: Lego Mindstorms with a 9 Volt Battery
From: rten at new.metronet.com rten at new.metronet.com
Date: Tue Dec 31 20:44:01 CST 2002

Connect an ammeter in series with the AA pack and learn what current the
module pulls. This should tell you pretty quickly whether or not the 9v
cell can be used. Anything more than 15 mA means the 9v battery will die

On Tue, 31 Dec 2002, John R Caldwell wrote:

> The Mindstorms yellow brick is powered by 6 AA 1.5 volt batteries.  I'd like
> to reduce weight and have it powered by a 9 volt battery.  Has anyone done
> this?
> I noticed there is a 12 volt female connection on the brick  Does anyone have
> experience with this connection?  The Lego people said it was AC; I would use
> DC.
> John Caldwell
> 972.431.040
> .

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