On Fri, 12 Mar 2010 13:35:12 -0600, "Mark E. Skeels" said:
> Sheesh.
> 
> How can that work?

The reverse B-E junction produces light, which illuminates the B-C
junction which acts like a photocell.

I've tried it on TO-18 case transistors with the metal case cut open,
and you can see the light!

Cheers,

Bob


> Spehro Pefhany wrote:

> >
> >                +12VDC              eg. 2N4401
> >                   +       E    C
> >                   |  ___
> >                    -|___|- -   -  output (-300 ~ -400mV)
> >                             ^ /
> >                      1K     ---
> >                              |
> >                              |
> >                             ===
> >                             GND
> >
> >
> > Don't bother trying to SPICE it.

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