Subject:
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Re: RCX 2.0 -- ideas.
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Newsgroups:
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lugnet.robotics
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Date:
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Fri, 1 Jan 1999 03:38:04 GMT
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Original-From:
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John Donaldson <jdonaldson@ghg/AvoidSpam/.net>
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Viewed:
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1232 times
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I found a way to expand the inputs to a max of 64. This involves using
a Analog MUX. Ports A & B are setup to sense the digital input line to
the MUX. Each port is setup to look at four inputs for a total of eight
inputs. The output of the MUX is tied to Port C. A sensor task is setup
in NQC to toggle thru each input and record this to a varible. Since you
can only have 32 varibles, it may be better to use a 16 channel Analog
MUX. This would use only Port A to scan the 4 input lines and Port B for
the output of the MUX. Leaving Port C for future use.
Using a Analog MUX allows use of different sensors, touch,temp,light,
and rotational.
John A. Donaldson
Brett Carver wrote:
>
> Jakob Nebeker wrote:
> > 1. More connections. At least 4 outputs and 4 inputs.
>
> At the risk of being argumentative, I'd submit that no matter how many
> inputs/outputs they provide people will always want more. The trick is
> to "expand" what's available to do what you want to do.
>
> There are already various ideas and designs for running multiple sensors
> on a single input port. Three touch per port seems VERY workable and
> more is no doubt possible.
>
> Outputs are more of a "limit", but that just means one needs more
> creativity. I've got a robot about 2/3 built now as a prototype to
> expand output control. I use one motor to drive a transmission which
> will shift the other two motors between two different drive trains
> (each). I've pretty well finished the mechanical design and
> implementation, but still have all the coding to do (NQC). Of course if
> you can do it with two drive trains, you can do it with N (which would
> go a long way to solve the output limit).
>
> Don't see the 3-input/output as a limit, see it as a challenge to create
> a design that works within the limits.
>
> --
> Brett Carver
> brett@sr.hp.com
> (707) 577-4344
> --
> 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 is in Reply To:
 | | Re: RCX 2.0 -- ideas.
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| (...) At the risk of being argumentative, I'd submit that no matter how many inputs/outputs they provide people will always want more. The trick is to "expand" what's available to do what you want to do. There are already various ideas and designs (...) (25 years ago, 1-Jan-99, to lugnet.robotics)
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