Sound spectrum analyzer

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The audio spectrum analyzer is composed of three main components :

  • an electret microphone ands its pre-amplifier
  • a BA3830S spectrum analyzer chip
  • a set of LM3914 led drivers.

Here are the schematics:

Sound spec anal schematics 1.jpg
Sound spec anal schematics 2.jpg

The initial setup on a breadboard:

Sound spec anal breadboard.jpg

And some pictures of the final result using PCBs:

Sound spec anal live.jpg
Sound spec anal pcbs.jpg
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