In my system, in the radio...

[Seden]

J_Player,

Ok now I see where you're coming from,fair enough. Well I still would like to lash up a simple circuit to modulate my little laser with the 400hz square wave and see if I notice anything as it's got me interested. If it involved alot of building I wouldn't bother at the moment unless it's well documented so I'm not wasting precious time and effort.

Sounds good and hope you have a great Christmas,

Randy