Subject:
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Re: Eliminate high-speed derailments forever! (and possibly void your warranty)
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Newsgroups:
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lugnet.trains
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Date:
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Tue, 24 Aug 1999 21:58:16 GMT
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Viewed:
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2581 times
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In lugnet.trains, Ludo Soete writes:
> I just opened a LEGO TRAIN SPEED REGULATOR and drawn a shematic of it.
>
> The INPUT of the regulator may be an AC or a DC signal.
> Even reversing the polarity (in case of a DC voltage) won't damage the
> regulator.There's a full bridge rectifier on the printed cirquit board (pcb).
Wow. Good for them! (and us :-) I would have opened mine too, but am glad that
someone put it into good terms. Maybe this is something for the FAQ for those
that aren't electronics' newbies?
> Lego put on the input of the regulator : 9 - 12V AC, this has to do
> with the following things: • <snip>
> As you can see is it verry important to keep the input voltage as low as
> possible.So 9V AC is better than 12V AC
Very good.
> When you want to get a lower output voltage, then you have to open the
> speed regulator,or the input voltage must be lower than 9V DC !! • <snip>
> I've done a modification on it so that the maximum output voltage is aprox.
> 7.8V
That's reasonable.
<snip>
> With this action is the speed for step 5 and 6 (full speed)equal.
It doesn't get much plainer than that. :-)
-Tom McD.
when replying, spamcakes found growing in extremely dark rain forest areas
have been known to "hiss" at bright light.
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