Sound Reactive Light Cube , Featured in Hackspace

Introduction

Today we are going to make a sound Reactive wooden cube. Which will be changing color in perfect sync to the surrounding sounds or vibration.

Featured in #Hackspace 16th issue https://hackspace.raspberrypi.org/issues/16

Hardware required

Arduino Nano
Addressable UCS1903B DC5V
Mic based Sound Sensor Module
White Wood Cube

Theory

The sounds will be picked by the mic module and will be amplified and fed to the Arduino analog pin, we will read the analog pin values and using the fastLED library we will change the colors of the LEDs randomly according to the received values from the mic.

Step 1: Construction

Pictures speak 1000 words

Step 2: Schematics

Step 3: Programming

Download code from GitHub

https://gist.github.com/onajad/20bb5f24ca2162202e005bbcc85ae164

#include "FastLED.h" //fast led library
#define NUM_LEDS 10 //total no. of leds used
#define DATA_PIN 5 //digital pin at which the data pin is connected
#define mic A5 //analog input from mic module
int mic_Value; //to save raw value from mic
int red, green, blue; //to store RGB color values
CRGB leds[NUM_LEDS]; //fast led function 
void setup()
 {  
FastLED.addLeds(leds, NUM_LEDS); //as our led IC is UCS1903B,fast led support lots of ICs, find more 
 //FastLED.addLeds(leds, NUM_LEDS); //if you are using WS2812B insted of UCS1903B 
 LEDS.setBrightness(200); //setting brightness of LED (0 to 255) //info at fastled.io  
randomSeed(analogRead(0));// for generating random no. by taking noise from analog pin 0  
for (int i = 0; i <= 9; i++) //for changing color of all 10 LEDs  
{   
 leds[i] = CRGB(200, 200, 200); //for initial white color   
 LEDS.show(); //fastled function, without this function the colors won't be updated 
 }
}
void loop()
 {
 mic_Value = analogRead(mic); //storing analog values from mic to mic_value 
 if(mic_Value>100) //to avoid small noise 
 {   
 for(int i=0;i<=9;i++)//for changing color of all 10 LEDs   
 {    
red=random(255); //random red color value between 0 to 255    
green=random(255); //random green color value between 0 to 255   
blue=random(255); //random blue color value between 0 to 255   
leds[i]=CRGB(red,green,blue); //assigning color values to LEDs    
LEDS.show();  
}
 }
}