Re: [Vo]:Goose bumps at the surface of a polarized liquid submitted to a field

[Horace Heffner]

-----------------
|               |
V Emitter       |
                P
_ Plate         |
|               T1
|               |
|               |
-o-R1---G---R2-o-
 |      |      |
 o      o      o
 V1     G      V2
Fig. 1 - Circuit diagram for drop/thread detection


The emitter and plate can exchange places. Since the power supply is  
floated, possibly with an isolation transformer, P and T1 can  
exchange places.  If P is a small van de Graaf, then T1 has to be  
between P and the tip.  It is also possible to locate T1 between R1  
and the plate.

Regards,

Horace Heffner