Subject:
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Re: multi-device output controller
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Newsgroups:
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lugnet.robotics
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Date:
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Fri, 26 Mar 1999 17:38:56 GMT
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Viewed:
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1077 times
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There is no need to waste PWM levels on reverse. You can set the RCX motor output to
reverse speeds as well, giving you 7 outputs (fwd and rvs) instead of 3 1/2. You need
a bridge rectifier anyway; you might as well exploit it to indicate direction.
alex wetmore wrote:
> With a seperate battery box (from 8735 for instance) you could power the
> output full time. In this case you'd probably want to map it to something
> like this:
> off - off
> 1 - output 1 fwd
> 2 - output 1 rev
> 3 - output 2 fwd
> 4 - output 2 rev
> 5 - output 3 fwd
> 6 - output 3 rev
> full - output 4 fwd
>
> (if there is a 7 then you could get 4 outputs in fwd and reverse).
> You would get a max of 9 (or 12) outputs, but I think that would
> be plenty for most RCX-type robots (I still really haven't had to
> go beyond 3 outputs, but I've mostly built vehicles).
>
> alex
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Message has 1 Reply:
 | | Re: multi-device output controller
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| In my example the RCX output was just used to tell this mythical board which output to drive. Power for the output came from a battery box, always set to on. The RCX can't set direction on the battery box (at least not trivially). alex (...) -- Did (...) (26 years ago, 26-Mar-99, to lugnet.robotics)
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Message is in Reply To:
| | Re: multi-device output controller
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| (...) With a seperate battery box (from 8735 for instance) you could power the output full time. In this case you'd probably want to map it to something like this: off - off 1 - output 1 fwd 2 - output 1 rev 3 - output 2 fwd 4 - output 2 rev 5 - (...) (26 years ago, 26-Mar-99, to lugnet.robotics)
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