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RE: [AVR-Chat] Re: A/D and audio questions.

2004-01-03 by Larry Barello

Connect the ADC to the junction of the Cap and the resistor.  Then the audio
signal will be summed with Vcc/2 and give you +/- 511 counts on your ADC
results after subtracting 512.  As long as your audio input doesn't exceed
+/- VCC/2 you won't clip.

-----Original Message-----
From: c45a6 [mailto:clone45@hotmail.com]

Hello again!

I drew out a quick schematic for the AC coupling.  I wasn't sure
exactly how to wire it up.  Can you take a look at it and let me know
if it's what you mean?

The values of the capacitor pictured are wrong.  Don't worry about
that:

http://www.voxglitch.com/images/coupling_test.bmp

Also, was there any advice for me on how to NOT clip the lower half
of my audio signal when doing the A/D conversion?

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