【花雕体验】20 音乐可视化：ESP32_C3与WS2812B的系列尝试

eagler8

  【花雕体验】20 音乐可视化：ESP32_C3与WS2812B的系列尝试
  实验程序三：点亮LED—WS2812FX自动模式循环20种

1. /*
   
2.   【花雕体验】20 音乐可视化：ESP32_C3与WS2812B的系列尝试
   
3.   实验程序三：点亮LED—WS2812FX自动模式循环20种
   
4.   模块接线：WS2812B接D9
   
5.   MAX9814   ESP32_C3
   
6.   VCC          5V
   
7.   GND         GND
   
8.   OUT       D4(ADC4)
   
9. */
   
10. 
    
11. #include <WS2812FX.h>
    
12. 
    
13. #define LED_COUNT 256
    
14. #define LED_PIN    9
    
15. 
    
16. #define TIMER_MS 5000
    
17. 
    
18. WS2812FX ws2812fx = WS2812FX(LED_COUNT, LED_PIN, NEO_RGB + NEO_KHZ800);
    
19. 
    
20. unsigned long last_change = 0;
    
21. unsigned long now = 0;
    
22. 
    
23. void setup() {
    
24.   ws2812fx.init();
    
25.   ws2812fx.setBrightness(28);
    
26.   ws2812fx.setSpeed(1000);
    
27.   ws2812fx.setColor(0x007BFF);
    
28.   ws2812fx.setMode(FX_MODE_STATIC);
    
29.   ws2812fx.start();
    
30. }
    
31. 
    
32. void loop() {
    
33.   now = millis();
    
34.   ws2812fx.service();
    
35.   if(now - last_change > TIMER_MS) {
    
36.     ws2812fx.setMode((ws2812fx.getMode() + 1) % ws2812fx.getModeCount());
    
37.     last_change = now;
    
38.   }
    
39. }

复制代码

eagler8

实验场景图

eagler8

实验的视频记录


https://v.youku.com/v_show/id_XN ... hcb.playlsit.page.1

eagler8

  【花雕体验】20 音乐可视化：ESP32_C3与WS2812B的系列尝试
  实验程序四：MegunoLink音乐反应式LED灯带
  模块接线：WS2812B接D9
  MAX9814   ESP32_C3
  VCC          5V
  GND         GND
  OUT       D4(ADC4)

1. /*
   
2.   【花雕体验】20 音乐可视化：ESP32_C3与WS2812B的系列尝试
   
3.   实验程序四：MegunoLink音乐反应式LED灯带
   
4.   模块接线：WS2812B接D9
   
5.   MAX9814   ESP32_C3
   
6.   VCC          5V
   
7.   GND         GND
   
8.   OUT       D4(ADC4)
   
9. */
   
10. 
    
11. #include<FastLED.h>
    
12. #include<MegunoLink.h>
    
13. #include<Filter.h>
    
14. 
    
15. // define necessary parameters
    
16. #define N_PIXELS  24
    
17. #define MIC_PIN   4
    
18. #define LED_PIN   9
    
19. // the following parameters can be tweaked according to your audio levels
    
20. #define NOISE 150
    
21. #define TOP   (N_PIXELS+2) // allow the max level to be slightly off scale
    
22. #define LED_TYPE  WS2811
    
23. #define BRIGHTNESS  18     // a little dim for recording purposes
    
24. #define COLOR_ORDER GRB
    
25. 
    
26. // declare the LED array
    
27. CRGB leds[N_PIXELS];
    
28. 
    
29. // define the variables needed for the audio levels
    
30. int lvl = 0, minLvl = 0, maxLvl = 100; // tweak the min and max as needed
    
31. 
    
32. // instantiate the filter class for smoothing the raw audio signal
    
33. ExponentialFilter<long> ADCFilter(5,0);
    
34. 
    
35. void setup() {
    
36.   // put your setup code here, to run once:
    
37.   Serial.begin(115200);
    
38.   // initialize the LED object
    
39.   FastLED.addLeds<LED_TYPE,LED_PIN,COLOR_ORDER>(leds,N_PIXELS).setCorrection(TypicalLEDStrip);
    
40.   FastLED.setBrightness(BRIGHTNESS);
    
41. }
    
42. 
    
43. void loop() {
    
44.   // put your main code here, to run repeatedly:
    
45.   // read the audio signal and filter it
    
46.   int n, height;
    
47.   n = analogRead(MIC_PIN);
    
48.   // remove the MX9614 bias of 1.25VDC
    
49.   n = abs(1023 - n);
    
50.   // hard limit noise/hum
    
51.   n = (n <= NOISE) ? 0 : abs(n - NOISE);
    
52.   // apply the exponential filter to smooth the raw signal
    
53.   ADCFilter.Filter(n);
    
54.   lvl = ADCFilter.Current();
    
55. //  // plot the raw versus filtered signals
    
56. //  Serial.print(n);
    
57. //  Serial.print(" ");
    
58. //  Serial.println(lvl);
    
59.   // calculate the number of pixels as a percentage of the range
    
60.   // TO-DO: can be done dynamically by using a running average of min/max audio levels
    
61.   height = TOP * (lvl - minLvl) / (long)(maxLvl - minLvl);
    
62.   if(height < 0L) height = 0;
    
63.   else if(height > TOP) height = TOP;
    
64.   // turn the LEDs corresponding to the level on/off
    
65.   for(uint8_t i = 0; i < N_PIXELS; i++) {
    
66.     // turn off LEDs above the current level
    
67.     if(i >= height) leds[i] = CRGB(0,0,0);
    
68.     // otherwise, turn them on!
    
69.     else leds[i] = Wheel( map( i, 0, N_PIXELS-1, 30, 150 ) );
    
70.   }
    
71.   FastLED.show();
    
72. }
    
73. 
    
74. CRGB Wheel(byte WheelPos) {
    
75.   // return a color value based on an input value between 0 and 255
    
76.   if(WheelPos < 85)
    
77.     return CRGB(WheelPos * 3, 255 - WheelPos * 3, 0);
    
78.   else if(WheelPos < 170) {
    
79.     WheelPos -= 85;
    
80.     return CRGB(255 - WheelPos * 3, 0, WheelPos * 3);
    
81.   } else {
    
82.     WheelPos -= 170;
    
83.     return CRGB(0, WheelPos * 3, 255 - WheelPos * 3);
    
84.   }
    
85. }

复制代码

eagler8

实验场景图  动态图

eagler8

实验的视频记录（21秒）

https://v.youku.com/v_show/id_XN ... hcb.playlsit.page.1

eagler8

实验的视频记录（4分28秒）


https://v.youku.com/v_show/id_XN ... hcb.playlsit.page.5