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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Thu, 8 Feb 2001 01:33:37 GMT
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Viewed:
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909 times
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In lugnet.trains, Martin Legault writes:
> 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
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?"
> > > (IANAEE either, IAAME)
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Message has 1 Reply:
 | | Re: LEGO Capacitors use on Trains?
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| (...) go (...) would (...) a (...) energy (...) The problem is not the amount of energy that the capacitor can keep, it is the voltage that it can withstand between the 2 side. You could try to put 2 capacitor in serie, that would bring you 8V (...) (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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| there is some spec for the capacitor on TLC web site (URL) 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 (...) (24 years ago, 7-Feb-01, to lugnet.trains)
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