Subject:
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Re: Parallel sensor problem
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Newsgroups:
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lugnet.robotics.rcx.legos
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Date:
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Wed, 24 Jan 2001 00:42:22 GMT
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Viewed:
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3747 times
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Bernardo Dal Seno <piu1759@cdc8g5.cdc.polimi.it> wrote in message
news:87d7dd25ge.fsf@alpha.pippo.bogus...
> "Ross Crawford" <rcrawford@csi.com> writes:
>
> > Hi, all.
> >
> > I'm experiencing a strange problem. I'm using two RCXs to control my • crane, and
> > I have a single touch sensor connected to input 1 on RCX 1 & input 2 on • RCX 2.
> > However, when I run both programs, which both have a wait_event function • like:
>
> I don't know if this is your problem, but the input ports have polarity
> (one lead is connected to ground and the other to +5V through a resistor,
> if I remember correctly). Have you tried to change polarities?
Thanks. I'll try that.
> > Both programs work OK until one switches on a motor! As soon as that • happens
> > the *other* program does the slow-down! When the motor stops, correct
> > functioning returns! But this *only* happens when the sensor is • connected to
> > both inputs!
>
> Maybe the problem is not in polarity but in a voltage drop on the RCX with
> the motor on, draining current for the input port of the other RCX (that
> accounts for the fact that one RCX thinks the sensor is pressed).
Nup. I disconnected the motor, but the problem still occurred when the
output was activated.
ROSCO
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Message has 1 Reply:
 | | Re: Parallel sensor problem
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| (...) That isn't the problem. I reversed the sensor on one RCX, and they both showed it as being constantly pressed, so that must be the wrong polarity. But I also tried moving it from input 2 to 3. Works fine. Same programs, everything, it works in (...) (26 years ago, 24-Jan-01, to lugnet.robotics.rcx.legos)
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Message is in Reply To:
| | Re: Parallel sensor problem
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| (...) I don't know if this is your problem, but the input ports have polarity (one lead is connected to ground and the other to +5V through a resistor, if I remember correctly). Have you tried to change polarities? (...) Maybe the problem is not in (...) (26 years ago, 23-Jan-01, to lugnet.robotics.rcx.legos)
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