[sdiy] PCB layout rules

[Paul Perry]

Here's a problem though.... what do we mean by "sdiy frequencies"?
Edges of clocks, spikes as oscillators turn over, microprocessors....
there's a lot happening in most sdiy that involves high speed transitions.
To say nothing of crap like LEDs that have to be kept separate.
You can't sweep it under the carpet unless you have a REALLY DEEP
carpet!
Though if you mean, the analog ground, the digital ground, and the plane are
three separate nets that connect at one common point only, then yes, I
agree.

paul perry melbourne australia

----- Original Message ----- 
From: "John Luciani"
> At sdiy frequencies ff you have a single low impedance ground plane
> that connects analog and digital ground and you see noise it is radiated
> not conducted.