Subject:
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Re: Removing red led from light sensor..
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Newsgroups:
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lugnet.robotics
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Date:
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Thu, 10 Jun 1999 15:46:26 GMT
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Viewed:
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963 times
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Actually, I heard about this (the beam in front of the red LED) a few
months ago and my first reaction was, "Well, given that the problem
(as I understand it) is that the red LED bleeds light internally over
to the sensing LED side and that causes the loss in range, wouldn't
placing a beam right in front of the light just cause even MORE bleeding
(reflection) back into the whole unit?"
Is there actually any solid data on the beam solution working well?
Just curious...
On Thu, 10 Jun 1999 11:38:14 GMT, lego-robotics@crynwr.com <lego-robotics@crynw
r.com> wrote:
> It is actually easier to just place a beam in front of the sensor. The layout
> of the hole on the beam will block out the LED adn allow you to just use the
> sensor.
> DAN
>
> In a message dated 6/10/99 6:42:02 AM Eastern Daylight Time,
> mario.ferrari@edis.it writes:
>
> << lego-robotics@crynwr.com
>
> In lugnet.robotics, Patrick Lawrence writes:
> > I think I read someplace that if you remove the red led from the light
> > sensor it works much better.
> > Has any one done this and if so how did it work?
>
> Ralph Hempel describes some non-destructive tricks to get better readings
> from
> a light sensor. This is the address: >>
> --
> Did you check the web site first?: http://www.crynwr.com/lego-robotics
>
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Message has 1 Reply:
 | | Re: Removing red led from light sensor..
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| Jeff Blaine <jblaine@shell2.shore.net> wrote in message news:slrn7lvneh.n11....ore.net... (...) A simulation of the LEGO Light sensor circuit I did in PSpice showed that the sensor wouldn't read down to zero just because the way the LED interacts (...) (25 years ago, 10-Jun-99, to lugnet.robotics)
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Message is in Reply To:
| | Re: Removing red led from light sensor..
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| It is actually easier to just place a beam in front of the sensor. The layout of the hole on the beam will block out the LED adn allow you to just use the sensor. DAN In a message dated 6/10/99 6:42:02 AM Eastern Daylight Time, mario.ferrari@edis.it (...) (25 years ago, 10-Jun-99, to lugnet.robotics)
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