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DIY Sound Card Interface / RMS Voltmeter

post #1 of 5
1/3/10 at 6:48pm
Thread Starter 



I've been discussing this in the DIYAudio tubes forum, but figured some headphone geeks might be interested...

I designed a DIY interface to a sound card that makes it a little easier to use the PC as a piece of audio test equipment. Details are here:

Soundcard Interface

...and the thread at DIYAudio is here:

Test & Measurement interface for Soundcard - diyAudio

Pete
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post #2 of 5
1/3/10 at 7:24pm
wow, purchased.
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post #3 of 5
1/3/10 at 7:29pm
I've seen someone reference that somewhere, very nice work Pete!

/U.
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post #4 of 5
1/5/10 at 12:16am
Thread Starter 
Just in case anybody is building this, I just realized there is a small error in the schematic and BOM!

R14 should be 15k, and R15 should be 27.4k (or any ratio that gets you close, the pot can adjust it some).

You could also leave R14 at 10k and change R15 to something between 4-5k (4.7k would work). The control will be a little more touchy but you should be able to calibrate it OK.

I have updated the files on the web site and it's uploading now. (It might take a while because there are some PDF books transferring too.)

I'm sorry to all for the confusion on my part!

Pete
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post #5 of 5
1/5/10 at 12:38am
This is very cool. Too bad all my soundcard input suck.
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