Homebrew PCBs

Yes, now I understand. 
This is another ocasion when I read so many pages to understand almost 
nothing, and you give me the answer in few words :-) 
This is a real talent. Maybe you must take into consideration a 
teacher career ;-)


Adrian

--- In Homebrew_PCBs@yahoogroups.com, "Stefan Trethan" 
<stefan_trethan@...> wrote:

> 
> No, i imagine where the currents go and if the voltage drop they 
cause is  
> going to upset another circuit.
> If voltage drop is not seen by a sensitive part of the circuit it 
does not  
> matter.
> 
> The reason for star ground is that all the voltage drops are in 
parallel  
> to each other, so none can be seen by any other part of the circuit. 
But a  
> star branch to each and every connection is not always possible. So 
you  
> must think if the voltage drop of one branch will be a problem for 
another  
> branch, the drops will now be in series. You do not want "noisy" 
drops  
>  from digital circuits to be seen by a analog component that is 
sensitive  
> to the ground noise.
> 
> ST
>