Subject:
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Re: 9 Volt output
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Newsgroups:
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lugnet.technic
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Date:
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Tue, 7 Sep 2004 20:47:54 GMT
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Viewed:
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3227 times
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"Juergen Stuber" <juergen@jstuber.net> escreveu na mensagem
news:86d60y584d.fsf@jstuber.net...
> Hi Patrick,
>
> "Patrick Levy" <omiccron@uol.com.br> writes:
> >
> > Can anyone explain in detail the difference (Or point where I can read • about
> > it) of using this power sources:
> >
> > 9 Volts AA LEGO battery box (6 batteries)
> > RCX motor output (6 batteries)
> > 8475 (RC Buggy) RC Unit (6 batteries)
> > 9 Volt battery box (that one that comes with fiber optics - 1 battery)
> >
> > Because all of them are nine volts, but i get differences on speed and • power
> > when using them.
>
> the RCX has a current limitation per output of 550mA and can provide only
> 330mA mean motor current according to the data sheet of the motor driver.
>
> For the battery boxes it depends on the batteries,
> the lower internal resistance they have the better.
> A NiMH block battery in a 9V box can give quite a whack
> (NiMH is good for high current but has lower voltage).
>
> I don't have the RC buggy, but because its motors are much more
> power-hungry I suppose that the controller can provide
> several times the current of an RCX output.
>
>
> Jürgen
OK, But what does it really means? If the current is high, the motor will
run faster, or longer?
In this tree cenarios:
- RCX with one motor running at maximum power.
- 9 Volt Battery Box
(http://ldraw.org/library/official/images/7/2847c01.png) with one motor
- 9 Volt Battery Box (http://www.peeron.com/pics/inv/custpics/4760c01.jpg)
with one motor
Considering I always use "new" alkaline "Duracell" for all, and the same
motor in every case, (new geared technic motor:
http://ldraw.org/library/official/images/7/71427c01.png) I ask:
Wich one of these will have better duration?
Wich one of these will run faster?
Thanks again
Patrick
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Message has 2 Replies:
 | | Re: 9 Volt output
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| (...) Stronger :-) (...) That depends on the capacity of the batteries, normally given in mAh. AAs have more capacity than block batteries. (...) The more voltage the faster the unloaded motor runs, so then alkalines give you more speed than NiMHs. (...) (20 years ago, 8-Sep-04, to lugnet.technic)
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Message is in Reply To:
| | Re: 9 Volt output
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| Hi Patrick, (...) the RCX has a current limitation per output of 550mA and can provide only 330mA mean motor current according to the data sheet of the motor driver. For the battery boxes it depends on the batteries, the lower internal resistance (...) (20 years ago, 7-Sep-04, to lugnet.technic)
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