Floating Analog Signal in
Gerhard Fiedler email (remove spam text)
Gerhard Fiedler wrote:
>> My original design had the PIC ground and the analog ground connected
>> together. THEN I read the specification for the player and it says
>> "Analog return - Signal, never to be grounded inside attached device."
>> I do not have access to the internals of the device
> Can you at least look at the output with a scope -- referenced to the MP3
> output ground?
That should have been "referenced to the ground you want to hook your PIC
to". Or better both. And look at the analog ground, referenced to the PIC
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See also: www.piclist.com/techref/io/atod.htm?key=analog
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