Subject:
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Re: More outputs, thinking outside of the box...
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Newsgroups:
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lugnet.robotics
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Date:
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Sun, 14 Mar 1999 15:51:18 GMT
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Original-From:
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Dana Dansereau <danserea@home.com%ihatespam%>
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Viewed:
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1045 times
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From my experience:
The RCX uses- pulse width modulation -to save energy, which means it uses a
constant voltage-that never drops below 8 volts. It just reduces the
overall time the current is on. full power its on continuously and 1 its on
1/8 the amount of time-I' not sure what the Hz is. So I think you would
have to make a pulse "recognizer" to change the motors, but that would be
very complicated.
But maybe I a missing something and you can get better control of the
voltage. If I am tell me, because I'd love to be able to change the
voltage.
-----Original Message-----
From: OneTimeCRX <hchea@ramapo.edu>
Cc: lego-robotics@crynwr.com <lego-robotics@crynwr.com>
Date: Thursday, March 11, 1999 10:39 PM
Subject: Re: More outputs, thinking outside of the box...
> To get more electrical about it, how about making a voltage gate for the
> third output, that according to what voltage you set the third output to
> (between 1 to 9 volts), it switches on different sets of motors? Also,
> polarity changes could trigger more sets of motors, so that there would
> be a total of 20 outputs from the two original outputs (from -9 to 9
> volts in the third output controlling where the other two outputs go).
> Of course only two motors could be on at a time, but at least it won't
> be too bulky to make, and there won't be significant power loss (in
> theory). To illustrate, let's say that we set the third output to 0
> volts. This will allow the current from the two other outputs to a pair
> of motors (and they will get full forward/reverse freedom of motion).
> Then, later on set the third output to 1 volt. This will trigger the
> voltage gate/relay to allow the current from the other two outputs go to
> a different set of motors. This can be done for values of the third
> output being: -9, -8, -7, -6, ..., 0, 1, 2, ... , 9. Hmm, maybe I'll
> try it.
> --
> Cheers,
> Henry C.
> ***********************************************************
> * TAS: Physics 89 CR-X dx ES *
> * Email: hchea@ramapo.edu OR OneTimeCRX@aol.com *
> * TLS#28 *
> ***********************************************************
> --
> Did you check the web site first?: http://www.crynwr.com/lego-robotics
--
Did you check the web site first?: http://www.crynwr.com/lego-robotics
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Message has 1 Reply:
 | | Re: More outputs, thinking outside of the box...
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| (...) [snippage] ....So I think you would (...) Thanks for the info. It's funny that you should mention a pulse recognizer, because one of my side projects is an electric tachometer for my car (which previously had nothing to do with legos). I have (...) (26 years ago, 14-Mar-99, to lugnet.robotics)
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