Subject:
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Re: **** the Scout ****
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Newsgroups:
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lugnet.robotics
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Date:
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Mon, 15 Nov 1999 22:12:01 GMT
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Viewed:
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647 times
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> For an extra light sensor, I'd suggest going with a completely passive
> approach. One really cheap way is to use a CdS cell, which is essentially
> a resistor that varries depending on incident light.
I think that the CdS the best way to go also. I have the LEGO light sensor
circuit on a page: http://www.plazaearth.com/usr/gasperi/light.htm . It is
hard for me to believe that the LEGO light sensor works well enough to be
useful in passive mode. I think people were looking at this sensor for the
Cybermaster which only has passive mode inputs and found it barely worked.
If you need information about CdS sensors see:
http://www.plazaearth.com/usr/gasperi/cds.htm
Mike G.
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Message is in Reply To:
 | | Re: **** the Scout ****
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| (...) Perhaps I should've clarified my initial statement about passive vs. active sensors. According to TLG the Scout works with any passive sensor and has an internal ADC to measure analog voltages. Presumably there is an internal pullup resistor (...) (25 years ago, 15-Nov-99, to lugnet.robotics)
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