Homebrew PCBs

Perhaps the noise isn't something the circuits are picking up as 
much as the antenna is picking up something.  Don't know about the 
helicopters - I was always shy of those things - not sure why either.




--- In Homebrew_PCBs@yahoogroups.com, "Stefan Trethan" 
<stefan_trethan@g...> wrote:
>
> Electrical noise is unlikely to happen from a moving wire, 
otherwise each  
> wire inside any device would be a hazard.
> When you move it like in a magnetic field things are totally 
different.  
> Also, the moving parts in RC craft do seem to cause some strange 
sort of  
> interference i do not understand (especially helicopters it seems).
> 
> ST
> 
> 
> On Tue, 17 Jan 2006 17:18:55 +0100, lcdpublishing  
> <lcdpublishing@y...> wrote:
> 
> > Yup, that's what I meant.  Most of the stuff I make goes onto
> >
> > machines and they vibrate.  So I suspected that if the machine is
> >
> > vibrating, that could cause this wire to vibrate which in turn 
would
> >
> > create "noise" of some sort.
> >
> >
> > The only reason I suspected this is because of a bad experience I
> >
> > had many years back with radio controlled air planes.  I had a 
plane
> >
> > that would make spazy moves every once in a while.  It was a 
pain to
> >
> > fly (well, a challenge).  Anyway, after a long time of fighting 
the
> >
> > problem it turned out to be the throttle wire.  It would rub 
against
> >
> > the motor when the plane was in a certain attitude and this would
> >
> > cause the servos to jump wildly.  I recall the guys on the flying
> >
> > field telling me that it was "electrical noise" cause by that 
metal
> >
> > wire rubbing against the metal motor.  I added a small shield
> >
> > between the two and the problems went away.  So, I took that
> >
> > experience and applied it to that little trace wire fix and 
expected
> >
> > similar problems.
> >
> >
> > Chris
>