pcb power ground problem.

[qweets]

hello there.

I have a problem with my design.

I have an audio design placed together with an led system which is controlled by a micro controller.They both share the same Power supply which is causing problems i beleive.

The audio system sounds great by itself, that is until i conect up the micro controller and light up a few leds.Then there is a terrible interference noise and pulse sound.

I wonder do i need two seperate ground planes and to somhow use diodes to seperate the audio system power from the micro controller power?

Here is a schematic to help explain the system.

Your help is greatly appreciated. : )

 

[qweets]

I believe it is solved, the PSU was not powerful enough or failing . i changed the PSU and so far it is working. pheew : )

 

[davenn]

well done

always a logical reason

cheers
Dave