Jim Robertson wrote:
>
> At 04:41 PM 12/13/96 +1100, you wrote:
> >At 12:37 PM 11/12/96 MST, you wrote:
> >>     What's your favorite opto-transistor?  I need to be able to "see"
> >>     sunlight with an opto-transistor (no accuracy required, using an
> >>     infrared transistor seems fine).
> >>
> >>     Dark current doesn't matter, "high noon" current of less than 1 mA is
> >>     okay.
> >
> >A part which is cheap and easily available at your corner electronics shop
> >would be the 2N2222. It's one of those tiny plastic packages(I don't know
> >the case no.) but with a transparent top.
> >
> >Regards
> >
> >Prashant
>
> Prashant,
>
> I always thought the 2N2222 was an NPN transistor. I know they are not
> commonly used in Australia. I wonder if you meant MEL-12 by any chance.
> This is a super alpha pair photo transistor. Doesn't have very good IR
> characteristics I believe.
>
> Jim

Yes Jim, I have to agree. When I have been desperate for an NPN
transistor, Radio Shack in OZ would always sell me a pair of 2N2222's.
The only transparent top was the packaging that they sold me for $2.99.
The transistors are free. :)

Don McKenzie donmck@labyrinth.net.au
DonTronics Tullamarine, Australia
http://www.labyrinth.net.au/~donmck

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