LX' Noisemeter
This is a small fun project made during an Arduino workshop and perfected afterwards. It uses an Arduino Nano as controller and an LED strip by Adafruit. I used 10 LEDs but the code can be adjusted to use an arbitrary amount.
The wiring is as follows:
Or if you're more into schematics:
I'm not sure about the exact model of the microphone sensor. But you get the idea.
Finally here's a photo:
