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SoundReactiveNeoPixelRing

This code lights up a NeoPixel ring according to the sound volume in the environment.

Sound reactive neo pixel ring

Background

  1. Each NeoPixel includes three distinct LEDs: one red, one green and one blue.
  2. The Arduino code lights up each of the LED colors seperately according to the sound picked up by the sensor:
    1. Red: brightness ramps up from 0% to 100% in a linear fashion.
    2. Green: brightness ramps down from 20% to 0% along a 1/x graph.
    3. Blue: brightness increases from 0% to 50% and then decreases back to 0% along a gaussian graph.

Components

  • 1 Arduino Uno
  • 1 NeoPixel Ring 12
  • 2 100 ohm Resistors
  • 1 47uF, 35V Polarized Capacitor
  • 1 MAX4466 Microphone Amplifier

Circuit Diagram

Circuit Diagram

Notes

  1. The NeoPixel ring requires 5V to operate
  2. The MAX4466 Microphone Amplifier requires 3V to operate (don't burn it out)
  3. Without the Resistors and Capacitor, the readings from the MAX4466 Microphone Amplifier will be all wrong, don't leave them out