[PD] puredata Arduino and Ping

[Kyle Klipowicz]

Yes, please describe the physical configuration of the 5 sensors
Marko. I am working on a similar project using 6 sensors, but we have
not done much testing in our proper configuration yet.

My guess is that since all the sensors are hard wired with a specific
ping frequency, they will detect each other's pings when placed in
close proximity.

~Kyle

On 6/3/07, marius schebella <marius.schebella at gmail.com> wrote:
> Hi,
>
> your code and patch look good. It is not clear to me, why you are using
> these delaytimes for the different sensors. but that should not affect
> your results anyway. the minimum delaytime between two measurements is
> only 200microseconds. but maybe it also depends on the length of the
> impulse? would it be possible, that the sensing fields of the 5 sensors
> overlap, and you get the crosstalk from that?
> on the other hand, it may also be possible that the problem is in your
> circuit. you could try to use 10k pulldown resistors. maybe that stops
> the crosstalk.
>
> marius.
>
>
> Marko Timlin wrote:
> > I am working with several ultra sound sensors called Ping from Parallax
> > wired to an Arduino board that is connected to puredata.
> > currently I am working with 3 sensors and it works fine.
> >
> > now I want to work with 5 sensors and the following problem occurs:
> > - I get "phantom" values on sensors that are not modified: if, for example, I change the value of sensor B, sensor C also changes its values, not exactely syncronized but it jumps to a simlar value range. very annoying indeed.
> > is that a problem of my script for arduino or a problem of pd?
> > does anybody already have experience with such a configuration?
> > I am using Pd version 0.39.2-extended-RC1 on windows xp.
> >
> > attached you find the arduino and pd patch for that idea.
> >
> > thanks,
> > marko
> >
> >
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