Subject:
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Re: color sensor: was ( Light sensor values)
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Newsgroups:
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lugnet.robotics
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Date:
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Sun, 19 Sep 1999 14:59:29 GMT
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Viewed:
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848 times
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Michael Gasperi <gasperi@alynk.com> wrote in message
news:FIA3zE.1Fn@lugnet.com...
>
> Stephen P. Gibbons <lego-robotics@crynwr.com> wrote in message
> news:37E361B0.6CA5FEB@aztech.net...
> > Pure-Lego (but more than one input/output unless a motor can be driven • off
> of the
> > output to a light sensor and the input from a light sensor and rotation • sensor can
> > be multiplexed):
> > 1) 1 light sensor
> > 2) 1 (micro)motor to drive the rotation of the filtering lenses
> > 3) 1 rotation sensor/fibre-optic to detect which lense is in place at a
> given
>
> > I can think of two sets of filters that would probably be useful:
> > RGB: (one red, one green, one blue, at 120o each.)
>
> You have a good idea, but the LEGO light sensor is a silicon photo
> transistor which is mostly sensitive to infra red. I doubt you could
> measure any thing like blue light with it.
I fixed up the spectral response chart on my CdS page to make the point more
clear.
http://www.plazaearth.com/usr/gasperi/cds.htm
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Message is in Reply To:
 | | Re: color sensor: was ( Light sensor values)
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| Stephen P. Gibbons <lego-robotics@crynwr.com> wrote in message news:37E361B0.6CA5FE...ech.net... (...) of the (...) sensor can (...) given (...) You have a good idea, but the LEGO light sensor is a silicon photo transistor which is mostly sensitive (...) (25 years ago, 18-Sep-99, to lugnet.robotics)
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