Subject:
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Re: LEGO Capacitors use on Trains?
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Newsgroups:
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lugnet.trains
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Date:
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Wed, 7 Feb 2001 23:28:11 GMT
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Viewed:
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850 times
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there is some spec for the capacitor on TLC web site
http://www.lego.com/dacta/elab/default.htm
Specifications:
1 F (Farad) 2.5 volt electrolytic capacitor
Operating voltage 2.5 normal
Charging voltage maximum 4 volt
Maximum charging and discharging current 0-250 mA
Red LED indicator when fully charged at 2.5 volt
Protected against reverse polarity; capacitor will not fully charge
Charged to 2.5 V the capacitor will store about 3.125 J of energy
the regulator (I tested 2) have output voltage of 3.0-3.1 Volts on setting #1
and 4.2-4.3 volts on setting #2.
At 3Volts the ligth is not brigth at all.
the suggestion to use the capacitor was good but not working with that
capacitor, again sorry to bring bad news.
Martin
In lugnet.trains, Martin Legault writes:
> oups!
>
> don't try it or be very carefull.
>
> the capacitor is a 1Farad 3Volts max capacitor.
>
> that would limit the voltage that you can put your regulator at 3V. If you go
> past that voltage, you'll end up blowing up your capacitor (quite a messy
> situation with electrolytic capacitor). At that voltage the ligth will be
> really dimmed.
>
> so that suggestion will not work, sorry :-(
>
> Martin
>
>
> In lugnet.trains, James Powell writes:
> >
> > > Of course, that might be an interesting way to make the train more "speed
> > > realistic" - it would gain speed more slowly since the capacitor would be
> > > pulling power from the motor, and it would slow down more slowly since the
> > > capacitor would be pushing power back into the motor.
> > >
> > > IANAEE though... (I am not an electrical engineer!)
> >
> > You'd have to use a diode. Trust me, it is very unlikely that the cap would • be
> > able to deliver much in the way of power to drive the train (they only hold a
> > few joules of energy, not much when compared even with the speed of a Lego
> > train).
> >
> > I think constant lighting is out for the same reasons, just not enough energy
> > density in the cap.
> >
> > James
> > (IANAEE either, IAAME)
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Message has 3 Replies:
 | | Re: LEGO Capacitors use on Trains?
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| (...) Well, if you can keep it at 3V maybe 3 cap's would be able to run the light, or maybe 2, if its hitting 4.5V? Josh "Where's the box car door again?" (...) (24 years ago, 8-Feb-01, to lugnet.trains)
| | | Re: LEGO Capacitors use on Trains?
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| (...) For those who 1) aren't electrical engineers, 2) don't mind using the occasional non-LEGO solution and 3) have some soldering experience, What _would_ be an appropriate specification for a capacitor to do the job described? Just in case (...) (24 years ago, 8-Feb-01, to lugnet.trains)
| | | Re: LEGO Capacitors use on Trains?
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| Thanks for the specs Martin, saved me 15 bucks. Wishful thinking on my part I guess. jt -- James J. Trobaugh North Georgia LEGO Train Club (URL) Legault <mlegault@nortelnetworks.com> wrote in message news:G8EuIz.BCp@lugnet.com... (...) #1 (...) you (...) (24 years ago, 8-Feb-01, to lugnet.trains)
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Message is in Reply To:
| | Re: LEGO Capacitors use on Trains?
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| oups! don't try it or be very carefull. the capacitor is a 1Farad 3Volts max capacitor. that would limit the voltage that you can put your regulator at 3V. If you go past that voltage, you'll end up blowing up your capacitor (quite a messy situation (...) (24 years ago, 7-Feb-01, to lugnet.trains)
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