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Soundwaves to electrons

November 21, 2008

Hello there,
Some weeks ago I built a little circuit to get sound in the Arduino.


Here’s a picture of the LM386 circuit:

The next step was to include a rectifier to get only positive voltage:

The input to the controller was a little nervous, so I built a little LowPassFilter:

Now the signal was rather good and I included it to my sketch with a RGB-Led.

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