shield the E-field ?

[Rothuize]

Ahhh,

these f... electronic switching power supply.

Why do you not use an "old fashioned" power supply with an big and heavy transformer in it ?  If you use such an old linear regulator you have an build-in isolator-trafo in it. And the linear voltage regulator gives an excellent noise-free 5V supply. And if this doesn't work good enough, add an big choke, as Steph post before.

http://de.farnell.com/webapp/wcs/stores/...er=2431582

Powering the BO-station from PC is the worst thing you can do. A PC is a "mudslinger" as it's best !

Thomas

;-)   normal I don't just the  PC als power supply  only now  for 2 min  
and ok that ## thing is no good   why I have this to my Board ?
and maybe I have a old one some ware   but must look   
so that one from the iphone will also not work  ;-)
many info on 1 day
thanks  for al the hard thinking

Gert