Alt-BEAM Archive
Message #00970
To: BEAM List beam@corp.sgi.com, Hendrickson hannah@nanospace.com
From: dennison dennlill@buffnet.net
Date: Wed, 24 Feb 1999 21:36:40 -0500
Subject: [alt-beam] Re: Cadmium Sulphide Photocells.....
True, but you can also buy them according to their resistance. If you want
Fast acting you buy a really smal CDS cell. If you want greater sensitivity,
you buy a big one. I like em, they do tend to be a little bit more expensive
than PD's however.
Dennison
>LDRs have a significantly slower response time compared to PDs, by up to a
>second or so. Photodiodes are resistive when reverse biased.
>Brian
>beamboter@iname.com
>www.welcome.to/briansbeam
>"There isn't much thrill in success
>unless one has first come close to failure"- W. Feather
>
>>What do you mean 'memory effect'?
>>Aren't photodiodes photovoltaic? Light dependant resistors aren't
>>Rob.
>>
>>
>>
>
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