Homebrew PCBs

agree completely.
how about a blade of ESD plastic brushing over the pcb?
i don't quite remember the resistance but maybe it is reasonably low.
otherwise a simple resistor will do.

ST


On Fri, 27 Feb 2004 17:54:34 -0500, Alan King <alan@...> wrote:

> Stefan Trethan wrote:
>
>    Had a thought that we probably need a very high value resistor 
> between the
> corona wire and the metal surface.  While the voltage is reasonably 
> high, the
> capacity of a sheet of paper would be almost nil, it's almost purely a 
> static
> charge with almost no current.  I can just see a sheet of metal hitting 
> the drum
> and not only the contact line transferring but 1/4" up the drum 
> discharging and
> a ton of toner falling off.  May still work ok really since the drum 
> coating has
> to be high resistance to hold the image.  But it'd cost almost nothing 
> to use a
> good resistor and not depend solely on the drum coating, and it may be 
> necessary
> for reliable operation.  Maybe even megaohms since the voltage is high 
> and the
> current should be very low.  Corona wire supply is probably very light 
> to begin
> with, but I would still bet it is many times what would possibly come 
> off of the
> sheet of paper after passing it.
>
> Alan