Subject:
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Re: Shutting off illumination LED on Light Sensor for LIDAR
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Newsgroups:
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lugnet.robotics
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Date:
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Fri, 30 Mar 2001 01:39:30 GMT
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Original-From:
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Chris 'Xenon' Hanson <xenon@3dnature.com^Spamcake^>
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Reply-To:
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xenon@3*saynotospam*dnature.com
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Viewed:
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839 times
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Bernardo Dal Seno wrote:
> lego-robotics@crynwr.com (Chris 'Xenon' Hanson) writes:
> > Someone else mentioned that LegOS is able to read the light
> > sensor 'passively' without illuminating the LED. Any LegOS
> > folks here know what they do differently?
> That's not a legOS feature. You just set the input port to passive mode,
> and read it in RAW mode. There is an example in NQC at
> http://www.mop.no/~simen/legoproxi.htm (I forgot to add the address in my
> previous post :-).
Thanks.
I had seen this technique (and noticed this effect myself)
but had heard rumor that this impaired the sensitivity of
the detector. I'm going to try some rigorous tests and see
if I can verify this.
> > I keep seeing references to Gasperi's web page as having a
> > schematic of the lego Light Sensor, which would be helpful,
> > but I haven't found it on his site yet (too much great stuff
> > to dig through). If anyone has a direct URL to the sensor
> > schematic, I'd appreciate it.
> You can find light sensor schematics on Michael Gasperi's page:
> http://www.plazaearth.com/usr/gasperi/light.htm
Ah! Thank you very much. That's exactly what I was hoping for!
We almost needa Yahoo-style categorized index of all this great
Lego robotics stuff. Navigation, Light sensors, rotation sensors,
sensor multiplexing, sensor modification, lidar, drive systems,
steering systems, the list goes on and on. Maybe I'll see if I can
throw together some sort of PHP-based SQL database to index some
of these links by the categories they apply to, and then query
by topic. I'm overwhelmed.
> bye
> Bernardo
Chris - Xenon
--
Chris Hanson | Xenon@3DNature.com | I've got friends in low latitudes!
New WCS 5 Demo Version! http://www.3DNature.com/demo/
"There is no Truth. There is only Perception. To Perceive is to Exist." - Xen
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