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320 changes: 160 additions & 160 deletions src/LED_Visualizer.ino
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Original file line number Diff line number Diff line change
@@ -1,161 +1,161 @@
/**
* LED Music Visualizer
* by Devon Crawford
* using the FastLED library: http://fastled.io/
* April 22, 2018
* Watch the video: https://youtu.be/lU1GVVU9gLU
*/
#include "FastLED.h"

#define NUM_LEDS 300 // How many leds in your strip?
#define updateLEDS 8 // How many do you want to update every millisecond?
#define COLOR_SHIFT 180000 // Time for colours to shift to a new spectrum (in ms)
CRGB leds[NUM_LEDS]; // Define the array of leds

// Define the digital I/O PINS..
#define DATA_PIN 6 // led data transfer
#define PITCH_PIN 0 // pitch input from frequency to voltage converter
#define BRIGHT_PIN 4 // brightness input from amplified audio signal

// Don't touch these, internal color variation variables
unsigned long setTime = COLOR_SHIFT;
int shiftC = 0;
int mulC = 2;

// Define color structure for rgb
struct color {
int r;
int g;
int b;
};
typedef struct color Color;

void setup() {
Serial.begin(9600);
FastLED.addLeds<NEOPIXEL, DATA_PIN>(leds, NUM_LEDS);
pinMode(A0, INPUT);
pinMode(A4, INPUT);

for(int i = 0; i < NUM_LEDS ; i++) {
leds[i] = CRGB(0,0,0);
}
FastLED.show();
}

void loop() {
unsigned long time = millis();

// Shift the color spectrum by 200 on set intervals (setTime)
if(time / (double)setTime >= 1) {
setTime = time + COLOR_SHIFT;
Serial.println(setTime);
shiftC += 200;
mulC++;
if(shiftC >= 600) {
shiftC = 0;
}
if(mulC > 3) {
mulC = 2;
}
}

// Shift all LEDs to the right by updateLEDS number each time
for(int i = NUM_LEDS - 1; i >= updateLEDS; i--) {
leds[i] = leds[i - updateLEDS];
}

// Get the pitch and brightness to compute the new color
int newPitch = (analogRead(PITCH_PIN)*2) + shiftC;
Color nc = pitchConv(newPitch, analogRead(BRIGHT_PIN));

// Set the left most updateLEDs with the new color
for(int i = 0; i < updateLEDS; i++) {
leds[i] = CRGB(nc.r, nc.g, nc.b);
}
FastLED.show();

//printColor(nc);
delay(1);
}

/**
* Converts the analog brightness reading into a percentage
* 100% brightness is 614.. about 3 volts based on frequency to voltage converter circuit
* The resulting percentage can simply be multiplied on the rgb values when setting our colors,
* for example black is (0,0,0) so when volume is off we get 0v and all colors are black (leds are off)
*/
double convBrightness(int b) {
double c = b / 614.0000;
if( c < 0.2 ) {
c = 0;
}
else if(c > 1) {
c = 1.00;
}
return c;
}

/**
* Creates a new color from pitch and brightness readings
* int p analogRead(pitch) representing the voltage between 0 and 5 volts
* double b analogRead(brightness) representing volume of music for LED brightness
* returns Color structure with rgb values, which appear synced to the music
*/
Color pitchConv(int p, int b) {
Color c;
double bright = convBrightness(b);

if(p < 40) {
setColor(&c, 255, 0, 0);
}
else if(p >= 40 && p <= 77) {
int b = (p - 40) * (255/37.0000);
setColor(&c, 255, 0, b);
}
else if(p > 77 && p <= 205) {
int r = 255 - ((p - 78) * 2);
setColor(&c, r, 0, 255);
}
else if(p >= 206 && p <= 238) {
int g = (p - 206) * (255/32.0000);
setColor(&c, 0, g, 255);
}
else if(p <= 239 && p <= 250) {
int r = (p - 239) * (255/11.0000);
setColor(&c, r, 255, 255);
}
else if(p >= 251 && p <= 270) {
setColor(&c, 255, 255, 255);
}
else if(p >= 271 && p <= 398) {
int rb = 255-((p-271)*2);
setColor(&c, rb, 255, rb);
}
else if(p >= 398 && p <= 653) {
setColor(&c, 0, 255-(p-398), (p-398));
}
else {
setColor(&c, 255, 0, 0);
}
setColor(&c, c.r * bright, c.g * bright, c.b * bright);
return c;
}

void setColor(Color *c, int r, int g, int b) {
c->r = r;
c->g = g;
c->b = b;
}

// Prints color structure data
void printColor(Color c) {
Serial.print("( ");
Serial.print(c.r);
Serial.print(", ");
Serial.print(c.g);
Serial.print(", ");
Serial.print(c.b);
Serial.println(" )");
}

/**
* LED Music Visualizer
* by Devon Crawford
* using the FastLED library: http://fastled.io/
* April 22, 2018
* Watch the video: https://youtu.be/lU1GVVU9gLU
*/
#include "FastLED.h"
#define NUM_LEDS 300 // How many leds in your strip?
#define updateLEDS 8 // How many do you want to update every millisecond?
#define COLOR_SHIFT 180000 // Time for colours to shift to a new spectrum (in ms)
CRGB leds[NUM_LEDS]; // Define the array of leds
// Define the digital I/O PINS..
#define DATA_PIN 6 // led data transfer
#define PITCH_PIN 0 // pitch input from frequency to voltage converter
#define BRIGHT_PIN 4 // brightness input from amplified audio signal
// Don't touch these, internal color variation variables
unsigned long setTime = COLOR_SHIFT;
int shiftC = 0;
int mulC = 2;
// Define color structure for rgb
struct color {
int r;
int g;
int b;
};
typedef struct color Color;
void setup() {
Serial.begin(9600);
FastLED.addLeds<NEOPIXEL, DATA_PIN>(leds, NUM_LEDS);
pinMode(A0, INPUT);
pinMode(A4, INPUT);
for(int i = 0; i < NUM_LEDS ; i++) {
leds[i] = CRGB(0,0,0);
}
FastLED.show();
}
void loop() {
unsigned long time = millis();
// Shift the color spectrum by 200 on set intervals (setTime)
if(time / (double)setTime >= 1) {
setTime = time + COLOR_SHIFT;
Serial.println(setTime);
shiftC += 200;
mulC++;
if(shiftC >= 600) {
shiftC = 0;
}
if(mulC > 3) {
mulC = 2;
}
}
// Shift all LEDs to the right by updateLEDS number each time
for(int i = NUM_LEDS - 1; i >= updateLEDS; i--) {
leds[i] = leds[i - updateLEDS];
}
// Get the pitch and brightness to compute the new color
int newPitch = (analogRead(PITCH_PIN)*2) + shiftC;
Color nc = pitchConv(newPitch, analogRead(BRIGHT_PIN));
// Set the left most updateLEDs with the new color
for(int i = 0; i < updateLEDS; i++) {
leds[i] = CRGB(nc.r, nc.g, nc.b);
}
FastLED.show();
//printColor(nc);
delay(1);
}
/**
* Converts the analog brightness reading into a percentage
* 100% brightness is 614.. about 3 volts based on frequency to voltage converter circuit
* The resulting percentage can simply be multiplied on the rgb values when setting our colors,
* for example black is (0,0,0) so when volume is off we get 0v and all colors are black (leds are off)
*/
double convBrightness(int b) {
double c = b / 614.0000;
if( c < 0.2 ) {
c = 0;
}
else if(c > 1) {
c = 1.00;
}
return c;
}
/**
* Creates a new color from pitch and brightness readings
* int p analogRead(pitch) representing the voltage between 0 and 5 volts
* double b analogRead(brightness) representing volume of music for LED brightness
* returns Color structure with rgb values, which appear synced to the music
*/
Color pitchConv(int p, int b) {
Color c;
double bright = convBrightness(b);
if(p < 40) {
setColor(&c, 255, 0, 0);
}
else if(p >= 40 && p <= 77) {
int b = (p - 40) * (255/37.0000);
setColor(&c, 255, 0, b);
}
else if(p > 77 && p <= 205) {
int r = 255 - ((p - 78) * 2);
setColor(&c, r, 0, 255);
}
else if(p >= 206 && p <= 238) {
int g = (p - 206) * (255/32.0000);
setColor(&c, 0, g, 255);
}
else if(p <= 239 && p <= 250) {
int r = (p - 239) * (255/11.0000);
setColor(&c, r, 255, 255);
}
else if(p >= 251 && p <= 270) {
setColor(&c, 255, 255, 255);
}
else if(p >= 271 && p <= 398) {
int rb = 255-((p-271)*2);
setColor(&c, rb, 255, rb);
}
else if(p >= 398 && p <= 653) {
setColor(&c, 0, 255-(p-398), (p-398));
}
else {
setColor(&c, 255, 0, 0);
}
setColor(&c, c.r * bright, c.g * bright, c.b * bright);
return c;
}
void setColor(Color *c, int r, int g, int b) {
c->r = r;
c->g = g;
c->b = b;
}
// Prints color structure data
void printColor(Color c) {
Serial.print("( ");
Serial.print(c.r);
Serial.print(", ");
Serial.print(c.g);
Serial.print(", ");
Serial.print(c.b);
Serial.println(" )");
}
.