Subject:
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Re: Motor control
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Newsgroups:
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lugnet.trains
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Date:
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Thu, 17 May 2001 17:30:19 GMT
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Viewed:
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1953 times
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Lester Witter wrote:
> In lugnet.trains, Dean Husby writes:
> > Lester Witter wrote:
> >
> > > Has anyone considered modifying a train motor so that it can be controlled • from
> > > an on-board RCX but powered from the tracks? The aux power tap on the top • might
> > > be used as a connector to an RCX output. Its internal connection to the • power
> > > tap would be broken and it would be used to control an electronic switch • (like
> > > an opto-isolator) Is there room in the motor for a small circuit board (I am
> > > guessing no).
> > >
> > > Lester
> >
> > I did this exact thing quite a while ago. I have some pics the motor at
> > http://www.akasa.bc.ca/tfm/lego_rcxtrain.html
> >
> > I ran this on the PNLTC's worlds longest Track record Breaking layout. I used • a
> > Mindstorms Remote to control it. The pics show it in red but I converted it to
> > yellow. See here. http://www.akasa.bc.ca/tfm/temppics/DSC00027.jpg
> >
> > Dean
> > --
> > Coin-Op's For Sale!: http://www.akasa.bc.ca/tfm/coin-op.html
> > Dean's Lego Workshop: http://www.akasa.bc.ca/tfm/lego_wr.html
> > Vancouver Lego Club: http://www.akasa.bc.ca/vlc
>
> Thanks for the reference. What I was looking for was powering the RCX and motor
> separately. The an RCX output would act as an electronic switch.
My project involved a connector going from the aux power port on the motor. (Track
Power) and running that into the RCX's Power Port. Then I used Port A to run the
Train motor and Port B ran my lights. This way the lights would blink to show what
state it was operating in.
> This is
> primarily intended to avoid running down the RCX batteries. Does anyone know
> how long it takes a train motor to run out a set of batteries on an RCX (I know
> this is dependent on load)
I ran my RCX ALL day pulling at least 5 large cars. It lasted quite a while. I was
afraid of losing my firmware on a brownout and changed the batteries each day.
Dean
--
Coin-Op's For Sale!: http://www.akasa.bc.ca/tfm/coin-op.html
Dean's Lego Workshop: http://www.akasa.bc.ca/tfm/lego_wr.html
Vancouver Lego Club: http://www.akasa.bc.ca/vlc
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Message is in Reply To:
 | | Re: Motor control
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| (...) from (...) might (...) power (...) (like (...) a (...) separately. The an RCX output would act as an electronic switch. This is primarily intended to avoid running down the RCX batteries. Does anyone know how long it takes a train motor to run (...) (25 years ago, 17-May-01, to lugnet.trains)
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