Subject:
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Re: Resets
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Newsgroups:
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lugnet.robotics.handyboard
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Date:
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Sat, 23 Mar 1996 23:49:34 GMT
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Original-From:
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John S Seng <jseng@relay.acns.nwu=StopSpam=.edu>
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Viewed:
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2074 times
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If I add a separate motor power to the L293's, can I keep the ground
lines common? If not, what pins are motor ground? (I know pins 4,5,12,
and 13 are ground) Thanks.
-John
On Sat, 23 Mar 1996, raest wrote:
> I have a few suggestions, these are all things that I have seen before to
> help reduce noise from motors
>
> I think that the problem might be due to crap getting back to the power
> line... thereby causing the DS1233 to say, time to reset...
>
> - try a seperate power supply for the 293 chips, this isolates them from
> the power for the
> - add another inductor to the power supply for the cpu, there is
> currently one there vs 2 on the Mini Board
> - you might add some caps across the motor terminals, this can help sock
> up some of the noise
> - you might also add another large cap to the power line
>
>
> On Fri, 22 Mar 1996, Fred G. Martin wrote:
>
> > > I traced my reset problem down to the fact that there is a ton of
> > > electrical noise in the chip power (+5V). The noise is there only when
> > > motors are running. After a minute or so of running the motors, I'll get
> > > a runtime error or the board will just hang. These are the same motors
> > > that I used to run for hours. Any ideas? TIA (again...:)
> >
> > I can't say that I have an explanation of why the motors would work at
> > first and then cause problems later, but I can say that:
> >
> > Not all motors work with the Handy Board. In particular, motors that
> > want to draw too much current (e.g., more than 1A) will cause
> > problems.
> >
> > If the L293's are getting too hot to touch when running the motors,
> > the motors are probably going to be a problem.
> >
> > -Fred
> >
> >
>
>
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Message is in Reply To:
 | | Re: Resets
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| I have a few suggestions, these are all things that I have seen before to help reduce noise from motors I think that the problem might be due to crap getting back to the power line... thereby causing the DS1233 to say, time to reset... - try a (...) (29 years ago, 23-Mar-96, to lugnet.robotics.handyboard)
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