🚀 go-pugleaf

cs348c00@ibmb8.cs.uiuc.edu (Frank D.) on  Mon Dec 14 22:35 1992 posted:
|
|Hi,     I have a simple (probably dumb) question regarding the line-in/
|line-out voltages of my stereo.  I'd like to digitize it, but don't
|know what voltage range it is in.  Since the stereo is at home, I
|don't have any scopes handy or any other fancy equiptment.  My volt
|meter won't work (i.e. won't tell me any voltages, maybe it's changing
|too fast/too small?).   Anyway, if anyone can help me out by telling
|my the voltage range, I'd greatly appreciate it!  Also, since this is
|my first time playing around w/ the line-in/-out any hints/advice is also
|greatly welcomed!
|
|                T H A N K S !!!
 
 
	The line in/out voltages should be about 100mv, even though
I have seen a few oddballs with about 500mv. But most are 100mv.
Many volt meters are designed to work with AC at 60Hz and have 
very poor accuracy above and below that. There are a few CKTs that
you can hook your meter to to make it work better in the Audio range.
 
	If I am correct Z should be 1000 OR 5000 ohms, I cannot remember
which. I also know a few tricks about Line jacks that are handy.
 
	I would suggest designing the ADC/DAC ckt. to handle the
0-150mV range, but make it so you can raise or lower it if need be.
 
 
	Drop me some Email if you areinterested in a few other
tricks I know.
 
 
-- 
A. TRENT PHILLIPS |" A mirror is a negative space with a frame and a place for
  also known as   | your face, it reveals what the rest of us see. It conceals
   WHITE  ROOK    | what you'd like you to be."--Blue Oyster Cult
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