Published February 9, 2020

Aduino Equalizer

Using Arduino code and a Sparkfun sound sensor the 3D printed light tower illuminates specific segments due to the strength of the sound.

BeginnerShowcase (no instructions)795

Story

FreshmanProjects,COEN1400,Fall2018

Project Overview

Using Arduino code and a Sparkfun sound sensor, our light display shows a series of color changing LED strips. The LED’s are housed inside a t-glase, acrylic, and birch wood display case. The Sparkfun sound sensor reads analog values from the intensity of the sounds around it then the Arduino code then illuminates certain segments of the tower (starting at the bottom) based on the range of analog values the sound sensor picked up. Encased in the bottom acrylic segment is a Bluetooth speaker to play music for the sound sensor to pick up, the sound sensor, Arduino, and a custom PCB for power distribution. Each of the opaque t-glase 3D printed segments has 13 Neo-pixel individually addressable LEDs wired through a center column to the custom PCB in the base.

Design requirements:

Using Adafruit NeoPixel arduino libraries to write code
Incorporated bluetooth speaker, arduino, and arduino sound sensor into design
CNC bottom of casing to mount arduino, sound sensor, and speaker
Laser cut base, 3D printed segments separated by acrylic for LED housing

Wiring Diagram

The wiring diagram shows how the inside components are wired together.

Software Diagram

The software diagram shows how the arduino code runs based on the data received by the sound sensor.

Finalized components

finalized custom power distribution PCB has header pins for connection from arduino and to Neo-Pixel LEDs. PCB also has decoupling capacitor and series resistors to protect the arduino and LEDs from current and voltage surges.

Final Product Test

Disclaimer:

This project was my first engineering project as a freshman in electrical engineering after working on this project I'm sure there are many ways that this could be improved and already have some ideas how to change aspects of it.

Schematics

Code

Arduino_Equalizer

#include <Adafruit_NeoPixel.h>

int incomingByte = 0;
int sensorInput;
int sensePin = A1;

Adafruit_NeoPixel strip_a = Adafruit_NeoPixel(13, 2, NEO_RGB + NEO_KHZ800); //defines each individual strip as 10 pixels and what pin they are associated with
Adafruit_NeoPixel strip_b = Adafruit_NeoPixel(13, 3, NEO_RGB + NEO_KHZ800);
Adafruit_NeoPixel strip_c = Adafruit_NeoPixel(13, 4, NEO_RGB + NEO_KHZ800);
Adafruit_NeoPixel strip_d = Adafruit_NeoPixel(13, 5, NEO_RGB + NEO_KHZ800);
Adafruit_NeoPixel strip_e = Adafruit_NeoPixel(13, 6, NEO_RGB + NEO_KHZ800);

void setup() {
  strip_a.begin();
  strip_a.show();
  strip_b.begin();
  strip_b.show();
  strip_c.begin();
  strip_c.show();
  strip_d.begin();
  strip_d.show();
  strip_e.begin();
  strip_e.show();

    Serial.begin(9600); // opens serial port, sets data rate to 9600 bytes per second

}

void loop() {
int value;
  value = analogRead(A1);
  sensorInput = analogRead(A1);
  Serial.println(value);
  

for(int i=0; i<13; i++)
{
  if ( (value <= 10) )
  {
    strip_a.setPixelColor(i, strip_a.Color(8, 94, 135));//on
    strip_b.setPixelColor(i, strip_b.Color(0, 0, 0));//off
    strip_c.setPixelColor(i, strip_c.Color(0, 0, 0));//off
    strip_d.setPixelColor(i, strip_d.Color(0, 0, 0));//off
    strip_e.setPixelColor(i, strip_e.Color(0, 0, 0));//off
    strip_a.show();
    strip_b.show();
    strip_c.show();
    strip_d.show();
    strip_e.show();
  }
  else if( (value > 10) && (value <= 30) )
  {
    strip_a.setPixelColor(i, strip_a.Color(8, 94, 135));//on
    strip_b.setPixelColor(i, strip_b.Color(0, 0, 255));//on
    strip_c.setPixelColor(i, strip_c.Color(0, 0, 0));//off
    strip_d.setPixelColor(i, strip_d.Color(0, 0, 0));//off
    strip_e.setPixelColor(i, strip_e.Color(0, 0, 0));//off
    strip_a.show();
    strip_b.show();
    strip_c.show();
    strip_d.show();
    strip_e.show();
  }
  else if( (value > 30) && (value <= 50) )
  {
    strip_a.setPixelColor(i, strip_a.Color(8, 94, 135));//on
    strip_b.setPixelColor(i, strip_b.Color(0, 0, 255));//on
    strip_c.setPixelColor(i, strip_c.Color(255, 0,0));//on
    strip_d.setPixelColor(i, strip_d.Color(0, 0, 0));//off
    strip_e.setPixelColor(i, strip_e.Color(0, 0, 0));//off
    strip_a.show();
    strip_b.show();
    strip_c.show();
    strip_d.show();
    strip_e.show();
  }
  else if( (value > 50) && (value <= 70) )
  {
    strip_a.setPixelColor(i, strip_a.Color(8, 94, 135));//on
    strip_b.setPixelColor(i, strip_b.Color(0, 0, 255));//on
    strip_c.setPixelColor(i, strip_c.Color(255, 0, 0));//on
    strip_d.setPixelColor(i, strip_d.Color(136, 255, 0));//on
    strip_e.setPixelColor(i, strip_e.Color(0, 0, 0));//off
    strip_a.show();
    strip_b.show();
    strip_c.show();
    strip_d.show();
    strip_e.show();
  }
  else if( (value > 70) && (value <= 90 ) )
  {
    strip_a.setPixelColor(i, strip_a.Color(8, 94, 135));//on
    strip_b.setPixelColor(i, strip_b.Color(0, 0, 255));//on
    strip_c.setPixelColor(i, strip_c.Color(255, 0, 0));//on
    strip_d.setPixelColor(i, strip_d.Color(136, 255, 0));//on
    strip_e.setPixelColor(i, strip_e.Color(0, 255, 0));//on
    strip_a.show();
    strip_b.show();
    strip_c.show();
    strip_d.show();
    strip_e.show();
  }
}

}

Credits

Alex Burg

2 projects • 0 followers

Currently a Electrical Engineering Student at CU Boulder

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Aduino Equalizer