Subject:
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Re: Batteries?
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Newsgroups:
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lugnet.robotics
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Date:
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Thu, 17 Dec 1998 01:41:19 GMT
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Original-From:
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Daniel Miller <DANIELMI@EXPERT.CC.saynotospamPURDUE.EDU>
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Viewed:
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1063 times
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On Wed, 16 Dec 1998 RSKSMBMS@aol.com wrote:
> Hello All, Is there a rechargable batteries that anyone can suggest to
> use with the RCX? How long does a group of batteries usually last? What
> happens to the programs stored in the RCX when the batteries rundown?
The RCX uses a six-pack of AA batteries. Its voltage range is 9-12 volts,
which puts the onboard power with alkies at the lower end. A six-pack of
nicads or nimhs puts out about 7.2 volts, possibly enough to work but
definitely below range. It would be entirely possible to jury-rig an
eight-pack of nicads, carried externally, which would bring you up to 9.6.
Nicads also have a lower capacity for the same size of cell; nimhs do
better. However, if you're going to resort to an external pack anyway,
what's limiting you to AA cells? They go up to D, you know... I believe
Trinity makes a D eight-pack that is intended for use with the Clodbuster
monster R/C truck.
Something that might make a difference: nicads can dump a lot faster than
alkies. This means, for a direct-to-motor application, that a stalled
motor (which is shorted out) is a Bad Thing for the pack and motor both.
I don't know how the RCX does speed control; would someone wiser than I
say if this is an issue?
Daniel "Dan'l" Miller Senior, School of Aeronautics and
danielmi@expert.cc.purdue.edu Astronautics, Purdue, Indiana
danielmi@cartoon.ecn.purdue.edu
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Message has 1 Reply:
 | | RE: Batteries?
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| (...) Sorry, I have no experience with rechargables in the RCX. (...) "9-12 volts" applies to the external power jack, and is for AC. That is not the same as the battery voltage. (...) No, it's not below range at all. The Mindstorms manual clearly (...) (25 years ago, 17-Dec-98, to lugnet.robotics)
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Message is in Reply To:
| | Batteries?
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| Hello All, Is there a rechargable batteries that anyone can suggest to use with the RCX? How long does a group of batteries usually last? What happens to the programs stored in the RCX when the batteries rundown? (25 years ago, 16-Dec-98, to lugnet.robotics)
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