实验的视频记录
优酷：
B站：https://www.bilibili.com/video/BV1L14y157PU/?vd_source=98c6b1fc23b2787403d97f8d3cc0b7e5
https://www.bilibili.com/video/BV1L14y157PU/?vd_source=98c6b1fc23b2787403d97f8d3cc0b7e5
【Arduino】168种传感器模块系列实验（资料代码+仿真编程+图形编程）
实验一百七十七：Wemos D1 R32 ESP32开发板
项目之四十六：基于虚拟轮生成颜色的256位音乐可视化
/*
【Arduino】168种传感器模块系列实验（资料代码+仿真编程+图形编程）
实验一百七十七：Wemos D1 R32 ESP32开发板
项目之四十六：基于虚拟轮生成颜色的256位音乐可视化
*/
#include <FastLED.h>
// LED LIGHTING SETUP
#define LED_PIN 23
#define NUM_LEDS 256
#define BRIGHTNESS30
#define LED_TYPE WS2811
#define COLOR_ORDER GRB
CRGB leds;
#define UPDATES_PER_SECOND 100
// AUDIO INPUT SETUP
int audio = 38;
// STANDARD VISUALIZER VARIABLES
int loop_max = 0;
int k = 255; // COLOR WHEEL POSITION
int decay = 0; // HOW MANY MS BEFORE ONE LIGHT DECAY
int decay_check = 0;
long pre_react = 0; // NEW SPIKE CONVERSION
long react = 0; // NUMBER OF LEDs BEING LIT
long post_react = 0; // OLD SPIKE CONVERSION
// RAINBOW WAVE SETTINGS
int wheel_speed = 4;
void setup()
{
// LED LIGHTING SETUP
delay( 3000 ); // power-up safety delay
FastLED.addLeds<LED_TYPE, LED_PIN, COLOR_ORDER>(leds, NUM_LEDS).setCorrection( TypicalLEDStrip );
FastLED.setBrightness(BRIGHTNESS );
// CLEAR LEDS
for (int i = 0; i < NUM_LEDS; i++)
leds = CRGB(0, 0, 0);
FastLED.show();
// SERIAL AND INPUT SETUP
Serial.begin(115200);
pinMode(audio, INPUT);
Serial.println("\nListening...");
}
CRGB Scroll(int pos) {
CRGB color (0,0,0);
if(pos < 85) {
color.g = 0;
color.r = ((float)pos / 85.0f) * 255.0f;
color.b = 255 - color.r;
} else if(pos < 170) {
color.g = ((float)(pos - 85) / 85.0f) * 255.0f;
color.r = 255 - color.g;
color.b = 0;
} else if(pos < 256) {
color.b = ((float)(pos - 170) / 85.0f) * 255.0f;
color.g = 255 - color.b;
color.r = 1;
}
return color;
}
void rainbow(){
for(int i = NUM_LEDS - 1; i >= 0; i--) {
if (i < react)
leds = Scroll((i * 256 / 50 + k) % 256);
else
leds = CRGB(0, 0, 0);
}
FastLED.show();
}
void loop(){
int audio_input = analogRead(audio)*5.5; // 在此处调整，以获得更多敏感性
if (audio_input > 0)
{
pre_react = ((long)NUM_LEDS * (long)audio_input) / 1023L; // TRANSLATE AUDIO LEVEL TO NUMBER OF LEDs
if (pre_react > react) // ONLY ADJUST LEVEL OF LED IF LEVEL HIGHER THAN CURRENT LEVEL
react = pre_react;
Serial.print(audio_input);
Serial.print(" -> ");
Serial.println(pre_react);
}
rainbow(); // APPLY COLOR
k = k - wheel_speed; // SPEED OF COLOR WHEEL
if (k < 0) // RESET COLOR WHEEL
k = 255;
// REMOVE LEDs
decay_check++;
if (decay_check > decay)
{
decay_check = 0;
if (react > 0)
react--;
}
delay(1);
}
实验场景图动态图
实验的视频记录
优酷：https://v.youku.com/v_show/id_XN ... hcb.playlsit.page.1
B站：https://www.bilibili.com/video/B ... 87403d97f8d3cc0b7e5
https://v.youku.com/v_show/id_XNTkyMTAwNDQwOA==.html?spm=a2hcb.playlsit.page.1
【Arduino】168种传感器模块系列实验（资料代码+仿真编程+图形编程）
实验一百七十七：Wemos D1 R32 ESP32开发板
项目之四十七：快速傅里叶变换256位频谱仪
/*
【Arduino】168种传感器模块系列实验（资料代码+仿真编程+图形编程）
实验一百七十七：Wemos D1 R32 ESP32开发板
项目之四十七：快速傅里叶变换256位频谱仪
*/
#include"arduinoFFT.h"
#include <FastLED.h>
#define NUM_LEDS 256
#define LED_TYPE WS2812
#define COLOR_ORDER GRB
arduinoFFT FFT = arduinoFFT();
CRGB leds;
#define CHANNEL 39
#define DATA_PIN 23
const uint8_t max_bright = 2;
const uint16_t samples = NUM_LEDS / 4;
const byte halfsamples = samples / 2;
uint8_t gHue;
int value;
double vReal;
double vImag;
char toData;
int pointJump;
int uJump;
int dJump;
int uValue;
int dValue;
int tValue;
int toDown = 0;
uint8_t toDownSpeed = 3;
int pointDown = 0;
uint8_t pointDownSpeed = 9;
void setup(){
delay(100);
Serial.println("Ready");
FastLED.addLeds<LED_TYPE, DATA_PIN, COLOR_ORDER>(leds, NUM_LEDS).setCorrection(TypicalLEDStrip);
FastLED.setBrightness(max_bright);
}
void loop(){
FastLED.clear();
EVERY_N_MILLISECONDS(10) {
gHue += 10;
}
for (int i = 0; i < samples; i++)
{
value = analogRead(CHANNEL);
vReal = value;
vImag = 0.0;
}
FFT.Windowing(vReal, samples, FFT_WIN_TYP_HAMMING, FFT_FORWARD);
FFT.Compute(vReal, vImag, samples, FFT_FORWARD);
FFT.ComplexToMagnitude(vReal, vImag, samples);
for (int i = 0; i < halfsamples; i++)
{
toData = vReal;
toData = constrain(toData, 0, 100);
toData = map(toData, 0, 100, 1, 7);
}
for (int i = 0; i < halfsamples; i++)
{
uValue = toData;
uJump++;
if (uValue > uJump)
{
uValue = uJump;
}
else
{
uJump = uValue;
}
dValue = uValue;
toDown++;
if (toDown % toDownSpeed == 0)
{
dJump--;
toDown = 0;
}
if (dValue > pointJump)
{
dJump = dValue;
}
else
{
dValue = dJump;
}
tValue = uValue;
pointDown++;
if (pointDown % pointDownSpeed == 0)
{
pointJump--;
pointDown = 0;
}
if (tValue > pointJump)
{
pointJump = tValue;
}
else
{
tValue = pointJump;
}
fill_rainbow(leds + 8 * i, uValue, gHue, 30);
fill_rainbow(leds + 8 * i, dValue, gHue, 30);
fill_solid(leds + 8 * i + tValue, 1, CRGB::White);
}
FastLED.show();
delay(2);
}
实验场景图
实验的视频记录
优酷：https://v.youku.com/v_show/id_XNTkxOTQxODA2OA==.html?spm=a2hcb.playlsit.page.3
B站：https://www.bilibili.com/video/BV1ye4y1s7n1/?vd_source=98c6b1fc23b2787403d97f8d3cc0b7e5
https://v.youku.com/v_show/id_XNTkxOTQxODA2OA==.html?spm=a2hcb.playlsit.page.3
实验场景图动态图
实验的视频记录
优酷：https://v.youku.com/v_show/id_XNTkxOTQxODEzNg==.html?spm=a2hcb.playlsit.page.1
B站：https://www.bilibili.com/video/BV1hg411q7yo/?vd_source=98c6b1fc23b2787403d97f8d3cc0b7e5
https://www.bilibili.com/video/BV1hg411q7yo/?vd_source=98c6b1fc23b2787403d97f8d3cc0b7e5