>If you can find some circuit I can not understand, I will be the
> first one to recognize and ask how it works. This is the only way
to

> learn, and nobody will mock me for asking, but they will mock
> me for faking knowledge.  Nobody can *guess* how to do a
> brain surgery, it must be part of a learning experience.

OK, I'll take Wagner up on his challenge.
I know it wasn't what he had in mind but this circuit is always fun.
It's been a while since it was mentioned here.
Those who know what's going on, no telling, OK?

>From memory, hope I've got this right.

Take any small signal NPN transistor.
Connect Collector to ground.
Connect base to about +12 volts DC through about a 1K resistor
(Yes, I know the base is not biased "normally")

1. Predict the voltage expected on the (open circuit) emitter.
Do this 1st before you measure.
No cheating y' hear.

2. Take an oscilloscope or standard electronic multimeter (typically
10M ohm plus input resistance)
Measure voltage between emitter (floating) and ground.
Explain your result.
Clue -  you cannot break the laws of Physics, even though it appears
that's what's happening here :-)

have fun



Russell McMahon