Subject:
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Re: Holidays, WHISTLES, new train accessory needed (was - Re: 8 Wide Train Pics)
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Newsgroups:
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lugnet.trains
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Date:
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Sun, 26 Dec 1999 02:47:56 GMT
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Viewed:
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1078 times
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In lugnet.trains, Tom Stangl writes:
> Hey, for that matter, the whistle could be built into the motor shell! And if
> the electronics were built right, they could output constant voltage to feed
> lights. Hmmmm, waitaminit - RCXes can power trains using their PWM - • couldn't
> you pull the motor out of a motor shell, and put a capacitor in there, so that
> the output on top of the shell was constant no matter what PWM the RCX was
> putting out? Hmmmm........then the variable PWM could program the timing of • the
> whistle, while the capacitor could power lights or motors. You could then use
> this "driver" wheel setup on any car...they could sell one "driver" with a
> whistle built in, and one driver with just the capacitor, so you wouldn't have
> competing whistles or have to worry about turning all but one of them off.
Maybe it wouldn't hafta be built into the motor shell necessarily. For those
folks like me who are more timid about brick surgery, all tronics needed could
be stuck inside the engine body itself.
Another thing that puzzles me is why TLC continues to use bulbs instead of
bright LEDs? Even with the problem of polarity, the problem _can_ be solved
with a tiny bridge rectifier, or even having two same-colored LEDs in polar
opposition in one lense could do it. Even without bridge rectification, adding
bi-polar dual-color LEDs can look really cool lighting semafores and other
lights signaling stuff.
> Seems to me like this is something TLC should look into along with the
> SuperBrick/RCX+ (if an RCX+ were sold, it would be nice if it had a higher
> amperage rating than the current RCX, so you could easily drive several trains
> with it, and drive different sections of track with different PWM).
Has anyone experimented with a 9V regulator (say a 7809 or even a LM317)
connected a variable voltage source such as track voltage? Below what source
voltage will the 9V regulator typically cease to deliver 9V, and what kind of
current dropoff can I expect?
-Tom McD.
when replying, the planet Oberon was made of spamcake.
www.baylug.org
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