Subject:
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Re: The NXT bit of information...
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Newsgroups:
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lugnet.robotics
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Date:
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Fri, 24 Feb 2006 08:22:33 GMT
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Viewed:
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2146 times
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In lugnet.robotics, John Barnes wrote:
> > I am somewhat disappointed by the light sensor with its single IR LED. The
> > "color" sensitivity hype made me think that at least 2 different color lightings
> > were available. Of course the possibility of turning off the Led is a great
> > improvement!
> >
> > Maybe... maybe that sensor is fast enough to establish a bidirectionnal IR link
> > with a RCX???
>
> Ergh,
>
> Take a close look at some of the pictures to found online. The LED isn't IR, its
> a regular old red LED.
You are right, John! I was fooled by their text description: "It is also
possible to turn off the infrared light source that is located below the
sensor(...)"
Philo
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Message has 1 Reply:
 | | Re: The NXT bit of information...
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| (...) I imagine there is a fair chance the RCX IR sensor can see the red LED, it just wouldn't register as brightly, so the range would be greatly reduced. LEDs can have a pretty narrow spectra, but sensors generally just have more of an "optimum" (...) (18 years ago, 24-Feb-06, to lugnet.robotics)
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