At 10:40 AM 12/21/01 -0800, Alice Campbell wrote:
>Oops, this time with topic tag :o
>
>
>              For my holidays I thought I'd build a nice PIC broadband
> radiation detector.
>               I've researched the web and asked around, and have found two
>              non-Geiger circuits that look promising.  Both involve a diode
>              of some sort for a detector, followed by a FET-style opamp,
>              followed by an audio or comparator stage for final output
> processing.
>
>
>              My question involves the diode detector:  One seems to call
>              for a 'large-area photodiode', something that I don't offhand
>              have in the junkpile, and the other for what looks like a
> high-voltage
>              automotive diode 1N3191.  Can anyone tell me why an automotive
>              diode would work for this, OR whether something else fairly
> common
>              might work?  I have a no-brand small-area photodiode with a
>              glass lens available.

Would a solar cell work?

--
http://www.piclist.com#nomail Going offline? Don't AutoReply us!
email listserv@mitvma.mit.edu with SET PICList DIGEST in the body