Subject:
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Re: Distance sensor for RCX based on Sharp GP2D12
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Newsgroups:
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lugnet.robotics
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Date:
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Mon, 23 Apr 2001 20:01:09 GMT
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Viewed:
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629 times
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Hi Steven,
you need another 4066.
The fourth bilateral switch is connected to ground. This provides (using the
2.2kOhm resistor) a reference value for the RCX. This values mark your start
point. This makes it possible to know "where" you are with your counter.
In my robot I have a task running, that polls the three sharps all the time and
stores the values in global variables. If the value is larger than 80 I know
that next value comes from my first sharp.
(The reading > 80 is reading ground with 2.2kOhm)
Rainer
Sorry, if this message appears a second time, but the first one seemed to be
not accepted.
In lugnet.robotics, Steven Nickle writes:
> Rainer,
>
> Do I need another 4066? Can't I just use the fourth one in the current 4066?
>
> In lugnet.robotics, Rainer Balzerowski writes:
> > -> parts you need :
> > 1 4066 (4 bilateral switches)
> > 1 Pot 10 kOhm
> > 2 resistor 10 kOhm
> >
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