Friday, February 15, 2013

Electret microphone

LM386 and electret circuit.
Tonight's project was to try out the LM386 together with the electret microphones I intend to use in my radio-beacon project. The microphones are intended to listen to a specific signal and provide the time difference between a radio signal and sound to give me a distance between the sender and the radio-beacon.

I had some issues getting this circuit to work. After much work I realized the electret microphone was not attached all the way into the breadboard. After that it worked as intended. But even with this success I have some doubts that the intended use will work. Well next time I will attach the speaker to another Arduino and see if I can receive the sound and perhaps measure the time it traveled.

Links to circuit´s:

Hardware:


Code:

6 comments:

  1. http://interface.khm.de/index.php/lab/experiments/arduino-realtime-audio-processing/

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  2. http://www.instructables.com/id/Arduino-Frequency-Detection/?ALLSTEPS

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  3. http://www.instructables.com/id/Arduino-Audio-Input/

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  4. http://lists.freeculture.org/pipermail/list/2010-April/000876.html

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  5. http://coolarduino.wordpress.com/2012/10/01/sound-localization/

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