Subject:
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Re: RCX Virus? - battery output and RCX performance
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Newsgroups:
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lugnet.robotics
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Date:
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Fri, 19 May 2006 18:49:08 GMT
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Viewed:
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2283 times
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> The Lego geared motors can pull about 250 mA when stalled, and close
> to that when heavily loaded. So for three motors, that may be more
> current than your batteries can deliver. Rechargeable batteries, esp
> NiMH, don't deliver the same peak current that Akaline disposables,
> or NiCd can.
I think that NiMH should be up to the task at that power level (difference
between NiMH and NiCd occur at much higher discharge rate). But maybe there is
one or more dead cell that cant't hold its charge? Since NiMH provide 7.2V
instead of 9V, we are closer to the working limit.
> So try again with some fresh, good alkalines. There's quite a
> variation in alkaline outputs across brands and versions too.
Agreed, that's something to do!
Philo
PS Sorry for my previous misleading post about RCX fuse, clearly not involved
here since the motors go on working (I missed that...)
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Message is in Reply To:
 | | Re: RCX Virus? - battery output and RCX performance
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| (...) The Lego geared motors can pull about 250 mA when stalled, and close to that when heavily loaded. So for three motors, that may be more current than your batteries can deliver. Rechargeable batteries, esp NiMH, don't deliver the same peak (...) (18 years ago, 19-May-06, to lugnet.robotics)
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