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Nimrod Kerrett 2 年之前
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共有 4 個檔案被更改,包括 117 行新增0 行删除
  1. 7
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      README.md
  2. 二進制
      SparkFun_Spectrum_Light_Organ.fzz
  3. 110
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      SparkFun_Spectrum_Light_Organ.ino
  4. 二進制
      SparkFun_Spectrum_Light_Organ_bb.png

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README.md 查看文件

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+### Sparkfun Spectrum Light Organ
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+
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+A "classic" light organ (2X3 12V led strips) based on a Sparkfun [Spectrum Shield](https://www.sparkfun.com/products/13116) for Arduino.
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+
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+![Schematic diagram](SparkFun_Spectrum_Light_Organ_bb.png)
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+
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+[video](https://www.zzzen.com/kraftz/2021-09-02%20bottle%20light%20organ.webm)

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SparkFun_Spectrum_Light_Organ.fzz 查看文件


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SparkFun_Spectrum_Light_Organ.ino 查看文件

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+#include <SoftPWM.h>
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+#include <SoftPWM_timer.h>
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+
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+// Dimmer potentiometer pin
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+#define DIMMER A5
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+
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+// LED strip V- pins
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+// The idea was that LED pins would be PWM, but board only has six, including pin 5
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+// (used as the spectrum shield's RESET pin [arggghhh]), so we use the SoftPWM library
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+// which allows us to replace pin 5 with 13
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+int leds[6] = { 9, 10, 11, 3, 13 /* don't you hate desoldering? */, 7};
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+
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+
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+// Spectrum Shield pin connections
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+#define STROBE 4
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+#define RESET 5 // See [arggghhh] above
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+#define AUDIO_LEFT A0
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+#define AUDIO_RIGHT A1
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+
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+//Define spectrum variables
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+int Frequencies_Left[7] = {0};
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+int Frequencies_Right[7] = {0};
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+
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+#define NOISE_LEVEL 32 // even "silence" has frequencies ;)
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+
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+int loud = 0; // dynamically determined from sound
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+int dimmer;   // DIMMER pot value scaled to 8 bit
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+int quiet;    // level below which LED is off (computed from dimmer and loud)
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+#define LOUDNESS_DECAY 0.01
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+#define NORMALIZE(level) level>NOISE_LEVEL ? constrain(map(level, quiet, max(loud, (quiet * 5 / 4)), 0, dimmer), 0, 255) : 0
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+
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+/********************Setup*************************/
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+void setup() {
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+  Serial.begin(9600);
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+  // init led pins, and flash them (to help check wiring)
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+  SoftPWMBegin();
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+  for (int i = 0; i < 6; i++) {
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+    pinMode(leds[i], OUTPUT);
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+    SoftPWMSetFadeTime(leds[i], 23, 42);
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+    SoftPWMSet(leds[i], 63);
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+    delay(250);
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+    SoftPWMSet(leds[i], 0);
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+  }
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+
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+  //Set spectrum Shield pin configurations
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+  pinMode(STROBE, OUTPUT);
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+  pinMode(RESET, OUTPUT);
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+  pinMode(AUDIO_LEFT, INPUT);
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+  pinMode(AUDIO_RIGHT, INPUT);
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+  digitalWrite(STROBE, HIGH);
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+  digitalWrite(RESET, HIGH);
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+
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+  //Initialize Spectrum Analyzers
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+  digitalWrite(STROBE, LOW);
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+  delay(1);
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+  digitalWrite(RESET, HIGH);
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+  delay(1);
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+  digitalWrite(STROBE, HIGH);
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+  delay(1);
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+  digitalWrite(STROBE, LOW);
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+  delay(1);
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+  digitalWrite(RESET, LOW);
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+}
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+
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+
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+/**************************Main Loop*****************************/
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+void loop() {
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+  Read_Frequencies();
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+  dimmer = 255 - (analogRead(DIMMER) >> 2);
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+  quiet = map(dimmer, 255, 0, NOISE_LEVEL, max((loud * 9) / 10, (NOISE_LEVEL * 10) / 9));
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+  Graph_Frequencies();
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+  Serial.print(loud);
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+  Serial.print(' ');
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+  Serial.println(quiet);
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+}
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+
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+
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+/*******************Pull frquencies from Spectrum Shield********************/
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+void Read_Frequencies() {
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+  int level = 0;
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+  //Read frequencies for each band
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+  for (int freq_amp = 0; freq_amp < 7; freq_amp++)
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+  {
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+    // a crude low-pass to smooth out noises
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+    Frequencies_Left[freq_amp] = (Frequencies_Left[freq_amp] + (Frequencies_Left[freq_amp] + analogRead(AUDIO_LEFT)) >> 1) >> 1;
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+    Frequencies_Right[freq_amp] = (Frequencies_Right[freq_amp] + (Frequencies_Right[freq_amp] + analogRead(AUDIO_RIGHT)) >> 1) >> 1;
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+    digitalWrite(STROBE, HIGH);
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+    digitalWrite(STROBE, LOW);
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+    level += Frequencies_Left[freq_amp] + Frequencies_Right[freq_amp];
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+  }
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+  level /= 12;
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+  Serial.print(level);
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+  Serial.print(' ');
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+  if (level > loud) {
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+    loud = level;
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+  } else {
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+    loud = max(level, int(round(float(loud) * (1.0 - LOUDNESS_DECAY))));
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+  }
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+}
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+
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+/*******************Light LEDs based on frequencies*****************************/
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+void Graph_Frequencies() {
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+  for (int i = 0; i < 3; i++)
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+  {
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+    int l = (Frequencies_Left[i * 2] + Frequencies_Left[i * 2 + 1]) / 2;
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+    int r = (Frequencies_Right[i * 2] + Frequencies_Right[i * 2 + 1]) / 2;
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+    SoftPWMSet(leds[i], NORMALIZE(l));
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+    SoftPWMSet(leds[i + 3], NORMALIZE(r));
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+  }
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+}

二進制
SparkFun_Spectrum_Light_Organ_bb.png 查看文件


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