NNTP-Posting-Date: Sat, 12 Oct 2002 18:48:21 -0500
Subject: Re: Unknown component... PIN photodiode?
Date: Sat, 12 Oct 2002 18:46:18 -0500
Organization: Majestic 12
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On Fri, 11 Oct 2002 07:55:30 -0700, Watson 'Atto Parsec' Name
, masquerading as a MSNBC reporter, said the
following to White House press secretary Ari Fleisher during a press
conference concerning the New War:
>Check this out: http://www.nteinc.com/specs/3000to3099/pdf/nte3033.pdf
>The package looks different, but the specs might be similar. A Q. for the
>OP, does the PPD sense light on the numbered side, or on the side opposite
Side opposite. Note that in the picture, the side with the munbers is
very dull finish. On the other side it's a high gloss.
>I have a question for those who may have dabbled in this before. I tried
>using a LED as a sensor, and found that it generated a few tenths of a volt
>when exposed to light, like the photodiode above. I used it in a circuit
>that senses the voltage the LED generates across a 10 meg resistor, but as
>one would expect, the current is miniscule because the junction area is so
>small, hence the 10 meg res. Is it better to use the LED in the
>photoconductive mode rather than as a photovoltaic generator?
>Xposted to s.e.d., s.e.m
Photoconductive definitely unless it was specifically made to work in
a generative mode. To get any kind of gain you'd likely get a lot of
noise too. Then again too, you know it never hurts to try. I've found
more bizarre yet excellent ways to do things just by trying wierd
methods than I sometimes know what to do with :-)
Thanks for the link, going there now!