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 19:08:54 GMT
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Viewed:
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977 times
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Lou Sortman wrote:
> Wes Matchett wrote:
>
> > There are 8 levels of PWM, so fwd/rev for 4 devices is possible.
>
> Are you sure? I wasn't, so I went looking. The NQC docs seem to imply 7 powers levels
> plus off. Which, technically, is 8 levels of PWM, but if you use all of them, a motor is
> running at all times. That is fine if you use another motor output to control the speed
> (as you mention later), but not if an external battery box is being used. The application
> where it is ok to have a motor running at all times will be rare. You could simply not use
> channel 0, but why build it then?
I don't know how NQC drives the ports, but both rcxcc and the RIS software have separate
controls for on/off and power level. I just tested setting all 8 power settings - motors
operates for all 8.
-Wes
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Message has 1 Reply:
 | | Re: multi-device output controller
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| Thanks for checking this out. This is important to know. I assume, then, that the duty cycles are 1/8 through 8/8 as well as off, which would be 0/8. Can anybody verify this (with a scope or something)? I have long wondered whether the duty cycles (...) (25 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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| (...) Are you sure? I wasn't, so I went looking. The NQC docs seem to imply 7 powers levels plus off. Which, technically, is 8 levels of PWM, but if you use all of them, a motor is running at all times. That is fine if you use another motor output (...) (25 years ago, 26-Mar-99, to lugnet.robotics)
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