🚀 go-pugleaf

Richard Banks (ah335@cleveland.Freenet.Edu) wrote:
> ++
> 
> a
> I have a 0plastic housing to put my circuit into but I'm worried about
> RFI int++erference.  I am going to try using aluminum foil, my question is
> how ma+ny layers do I need.  I know just one will not work.  I remember
> from 0chemistry I when rutherford discovered electrons they passed
> rig++ht through one layer of aluminum foil, or was that gold foil?
> At any rate could someone give me a good idea of how many layers to
> us+e to line the box with.   Thanks.  Richard Banks

Aluminum foil will work fine.  However 3M has a line of aluminum and copper
foil tapes with a conductive adhesive backing.  These can be applied to the
surface of the box.  This can be much easier than dealing with loose pieces
aluminum. 

As the other respondents noted, EM fields are effectively attenuated by
very thin layers of conductive material.  This