【花雕动手做】有趣好玩的音乐可视化系列小项目（18）--LED平面板灯 简单

/*
  【花雕动手做】有趣好玩的音乐可视化系列小项目（18）--LED平面板灯
  项目程序之一：绿色单灯循环测试48颗LED
*/

#include <Adafruit_NeoPixel.h>

#define PIN 6
#define MAX_LED 48

#define ADD true
#define SUB false

int val = 0;
boolean stat = ADD;

Adafruit_NeoPixel strip = Adafruit_NeoPixel( MAX_LED, PIN, NEO_RGB + NEO_KHZ800 );

void setup() {
  strip.begin();
  strip.show();
}

void loop() {
  uint8_t i, a = 0;
  uint32_t color = strip.Color(255, 100, 0);

  while (a < 49)
  {
    for (i = 0; i < 48; i++)
    {
      if (i == a) strip.setPixelColor(i, color);
      else strip.setPixelColor(i, 0);
    }
    strip.show();
    delay(20);
    a++;
  }
}

/*
  【花雕动手做】有趣好玩的音乐可视化系列小项目（18）--LED平面板灯
  项目程序之二：使用FastLED库的满屏换色测试
*/

#include <FastLED.h>
#define LED_PIN     6
#define NUM_LEDS    48
CRGB leds[NUM_LEDS];

void setup() {
  FastLED.addLeds<WS2812, LED_PIN, GRB>(leds, NUM_LEDS);
}

void loop() {
  for (int i = 0; i <= 47; i++) {
    leds[i] = CRGB ( 0, 0, 250);
    FastLED.show();
    delay(10);
  }
  for (int i = 47; i >= 0; i--) {
    leds[i] = CRGB ( 220, 0, 0);
    FastLED.show();
    delay(10);
  }
  for (int i = 0; i <= 47; i++) {
    leds[i] = CRGB ( 0, 230, 0);
    FastLED.show();
    delay(10);
  }
}

/*
  【花雕动手做】有趣好玩的音乐可视化系列小项目（18）--LED平面板灯
  项目程序之三：FastLED音乐反应节奏灯
  模块接线：WS2812B接D6
  MAX4466      UNO
  VCC          5V
  GND         GND
  OUT          D7
*/

#include<FastLED.h>
#define LED_PIN 6
#define NUM_LEDS 48

CRGB leds[NUM_LEDS];
uint8_t hue = 0;
int soundsensor = 7;

void setup() {
  delay(2000);
  FastLED.setBrightness(220);
  pinMode(soundsensor, INPUT);
  FastLED.addLeds<WS2812B, LED_PIN, GRB>(leds, NUM_LEDS);
}

void loop() {
  int sensval = digitalRead(soundsensor);

  if (sensval == 1) {
    leds[0] = CRGB :: Red;
    fill_solid(leds, NUM_LEDS, CRGB :: Blue);
    rainbow_moving();
    FastLED.show();
    delay(10);
  }
  else {
    leds[0] = CRGB :: Black;
    fill_solid(leds, NUM_LEDS, CRGB :: Black);
    FastLED.show();
    delay(10);
  }
}

void rainbow_moving() {
  for (int i = 0; i < NUM_LEDS; i++) {
    leds[i] = CHSV(hue + (i * 10), 255, 255);
  }
  EVERY_N_MILLISECONDS(10) {
    hue++;
  }
}

/*
  【花雕动手做】有趣好玩的音乐可视化系列小项目（18）--LED平面板灯
  项目程序之四：多彩MegunoLink伸缩音乐节拍灯
  模块接线：WS2812B接D6
  MAX4466      UNO
  VCC          5V
  GND         GND
  OUT          A0
*/

#include<FastLED.h>
#include<MegunoLink.h>
#include<Filter.h>

#define N_PIXELS  48
#define MIC_PIN   A0
#define LED_PIN   6
#define NOISE 10
#define TOP   (N_PIXELS+2)
#define LED_TYPE  WS2811
#define BRIGHTNESS  10
#define COLOR_ORDER GRB

CRGB leds[N_PIXELS];
int lvl = 0, minLvl = 0, maxLvl = 10;

ExponentialFilter<long> ADCFilter(5, 0);

void setup() {
  FastLED.addLeds<LED_TYPE, LED_PIN, COLOR_ORDER>(leds, N_PIXELS).setCorrection(TypicalLEDStrip);
  FastLED.setBrightness(BRIGHTNESS);
}

void loop() {
  int n, height;
  n = analogRead(MIC_PIN);
  n = abs(1023 - n);
  n = (n <= NOISE) ? 0 : abs(n - NOISE);
  ADCFilter.Filter(n);
  lvl = ADCFilter.Current();
  //  Serial.print(n);
  //  Serial.print(" ");
  //  Serial.println(lvl);
  height = TOP * (lvl - minLvl) / (long)(maxLvl - minLvl);
  if (height < 0L) height = 0;
  else if (height > TOP) height = TOP;
  for (uint8_t i = 0; i < N_PIXELS; i++) {
    if (i >= height) leds[i] = CRGB(0, 0, 0);
    else leds[i] = Wheel( map( i, 0, N_PIXELS - 1, 30, 150 ) );
  }
  FastLED.show();
}

CRGB Wheel(byte WheelPos) {
  if (WheelPos < 85)
    return CRGB(WheelPos * 3, 255 - WheelPos * 3, 0);
  else if (WheelPos < 170) {
    WheelPos -= 85;
    return CRGB(255 - WheelPos * 3, 0, WheelPos * 3);
  } else {
    WheelPos -= 170;
    return CRGB(0, WheelPos * 3, 255 - WheelPos * 3);
  }
}