Subject:
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Re: pictures from Wamalug's April 1st meeting
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Newsgroups:
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lugnet.trains
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Date:
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Wed, 11 Apr 2001 02:03:59 GMT
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Reply-To:
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dan@peeron#AntiSpam#.com
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Viewed:
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1240 times
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Ed McGlynn <ejmcglynn@netzero.net> wrote:
> Cool. So the polarity switches are motorized 5120s controlled by an RCX's
> light sensor inputs? Are there two inputs and two outputs used on the RCX?
> How do you limit the length of time the 5120s receive power from the motors?
> Is that a fixed length, or do you get fancy and use touch sensors? Looks
> like you run the motors on the 5120s for less than a second.
the 3 polarity switches are run by the 3 outputs of the RCX, with 2 inputs
used for light sensors. The construction of the polarity switches is so
that the timeing on the motors isn't important - the only reason they're
timed is to reduce wear on the Tom's motors and gears. I believe they're
run for 0.3 seconds, but that's from memory... Tom also has the DAT for
the construction of the switches, which I think was pretty ingenious :)
--
Dan Boger / dan@peeron.com / www.peeron.com / ICQ: 1130750
<set:6346_1>: Shuttle Launching Crew (LEGO/SYSTEM/Town/Flight), '92, 378 pcs, 5 figs
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Message is in Reply To:
 | | Re: pictures from Wamalug's April 1st meeting
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| (...) Dan - Cool. So the polarity switches are motorized 5120s controlled by an RCX's light sensor inputs? Are there two inputs and two outputs used on the RCX? How do you limit the length of time the 5120s receive power from the motors? Is that a (...) (24 years ago, 10-Apr-01, to lugnet.trains)
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