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/*MAX9814掉落效果版本
WS2812 燈帶*1
MAX9814模塊*1
公對母杜邦線*6
ESP8266NODEMCU開發板*1
開發板選擇Wifiduino 《《====================================
最小系統接線（燈帶60燈珠以下）
MAX9814 WS2812 ES8266
VCC +5V 3.3V
GND GND GND
OUT / DIN A0/GPIO5
GAIN 3.3
* * QQ群1147147694 《《=====================================
*/
//中間擴散效果
#include "FastLED.h"
#define NUM_LEDS 144 // LED燈珠數量
#define LED_DT 5 // 輸出控制信號引腳
#define sigPin A0 // ESP8266ADC引腳接MAX9814 OUT信號引腳 GAIN接3.3V
#define LED_TYPE WS2812 // LED燈帶型號
#define COLOR_ORDER GRB
CRGB leds[NUM_LEDS]; // 建立光帶leds
int sig;//麥克風讀取數值
int pre_si;//指示舊值
int si;//指示新值
int sig_min = 1024;//初始讀取值最大小值，開機后將重新界定
int sig_max = 0;
double triger_factor = 1.40;//閾值過濾噪音該數值調整范圍1-2 數值越高要求聲音越大才能觸發
int drop_dot; //初始掉落位置
unsigned long drop_time;//觸發掉落時機
int interval = 30; //每次律動變化的過渡時間
int drop_interval = 100; //掉落點收縮速度
int maxBrightness = 250;
int mid = int(NUM_LEDS / 2);
int delta = int(maxBrightness / mid); //漸變量
unsigned long triger_time = 0;
int randC = 130; //掉落點隨機顏色初始
bool raising = true;
void setup() {
Serial.begin(115200);
LEDS.addLeds<LED_TYPE, LED_DT, COLOR_ORDER>(leds, NUM_LEDS);
// .setCorrection(TypicalLEDStrip);//如果燈帶未響應，請設置
FastLED.setBrightness(255); // 設置光帶亮度
pinMode(sigPin, INPUT);
}
void loop()
{
musicV();
}
void musicV()
{
//計算環境讀取最大最小值，所以在上電后循環幾次后達到平穩的觸發值。
sig = analogRead(sigPin);
if (sig < sig_max)//
{
sig_max = sig;
}
if (sig > sig_min)
{
sig_min = sig;
}
int mean = (sig_min + sig_max) / 2;
int _sig = abs(sig - mean ) + mean;
_sig = constrain(_sig, int(mean * triger_factor), sig_max);
//Serial.println(_sig);
si = map(_sig - int(mean * triger_factor), int(mean * triger_factor) - int(mean * triger_factor), int(sig_max) - int(mean * triger_factor), 0, mid - 2);
si = constrain(si, 0, mid - 2);
if (si == mid - 2) {
randC = random(0, 255);
pre_si = 0;
}
Serial.println(randC);
//===================================================================================================== PART1
if (si > pre_si)
{
if (si > drop_dot)
{
if (si * 1.6 < mid - 1) {
drop_dot = int(si * 1.6);
}
else {
drop_dot = mid - 3;
}
}
for (int j = pre_si - 1; j < si + 1; j++)
{
while ( millis() - triger_time < int(interval / (si - pre_si) + 2))
{
if ((drop_dot > j + 3 ) && (millis() - drop_time > drop_interval))
{
leds [mid + drop_dot + 1] = CRGB::Black;
leds [mid - 1 - drop_dot - 1] = CRGB::Black;
leds[mid + drop_dot] = CHSV(int(255 - randC), 255, maxBrightness);
leds[mid - 1 - drop_dot] = CHSV(int(255 - randC), 255, maxBrightness);
FastLED.show();
drop_dot--;
drop_time = millis();
}
leds [mid + j] = CHSV(delta * j, 255, maxBrightness - delta * j);
leds [mid - 1 - j] = CHSV(delta * j, 255, maxBrightness - delta * j);
//leds [mid + j] = CHSV(randC, 255, 255 - delta * j);
//leds [mid - 1 - j] = CHSV(randC, 255, 255 - delta * j);
}
FastLED.show();
triger_time = millis();
}
}
// --------------------------------------------------------------------------------------------------
//===================================================================================================== PART2
if (si < pre_si)
{
leds [mid + drop_dot + 1] = CRGB::Black;
leds [mid - 1 - drop_dot - 1] = CRGB::Black;
leds[mid + drop_dot] = CHSV(int(255 - randC), 255, maxBrightness);
leds[mid - 1 - drop_dot] = CHSV(int(255 - randC), 255, maxBrightness);
FastLED.show();
drop_dot--;
drop_time = millis();
for (int k = pre_si + 1; k > si - 1; k--)
{
while ( millis() - triger_time < int(interval / (pre_si - si) + 2))
{
if ((drop_dot > k + 3 ) && (millis() - drop_time > drop_interval))
{
leds [mid + drop_dot + 1] = CRGB::Black;
leds [mid - 1 - drop_dot - 1] = CRGB::Black;
leds[mid + drop_dot] = CHSV(int(255 - randC), 255, maxBrightness);
leds[mid - 1 - drop_dot] = CHSV(int(255 - randC), 255, maxBrightness);
FastLED.show();
drop_dot--;
drop_time = millis();
}
leds[mid + k] = CRGB::Black;
leds[mid - 1 - k] = CRGB::Black;
}
FastLED.show();
triger_time = millis();
}
}
// --------------------------------------------------------------------------------------------------
if (si == 0 && pre_si == 0 && drop_dot > -1 && (millis() - drop_time > drop_interval))
{
leds [mid + drop_dot + 1] = CRGB::Black;
leds [mid - 1 - drop_dot - 1] = CRGB::Black;
leds[mid + drop_dot] = CHSV(int(255 - randC), 255, maxBrightness);
leds[mid - 1 - drop_dot] = CHSV(int(255 - randC), 255, maxBrightness);
if (drop_dot == 0)
{
leds [mid + drop_dot] = CRGB::Black;
leds [mid - 1 - drop_dot] = CRGB::Black;
}
FastLED.show();
drop_dot--;
drop_time = millis();
}
pre_si = si;
}

復制代碼

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