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 01:47:18 GMT
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Viewed:
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969 times
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In lugnet.trains, Kevin Maynes writes:
> 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
>
>
> 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 someone might like to try it out..
>
> Kevin
There is no good solution, unless you want to run your train at full speed for
interval period in order to charge a big capacitor at 8-9Volts, then reduce the
speed of the train and let the capacitor feed the ligth. Using that method the
ligth will be brigth when capacitor at full charge and will slowly lose some
brigthness when the capacitor will discharge.
Before the Lego capacitor, I saw one 1Farad 5V capacitor (better but not enough
voltage), It was the size of 5-6 quarter stack on top of each other. a 9 or 10
V would be more than twice the size + the require circuit (diode, resistor)
In my opinion the best solution would be to use a 9V battery in the lego case
power the ligth.
Martin
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Message has 1 Reply:
Message is in Reply To:
 | | 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)
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