Hit'n'Blink

/*
 * Visualization of drum sticks hitting drum pad
 * LED ring and/or stripe (selectable by external switch, see schematics) w/ selectable
 *  - color pattern (based on input from potentiometer)
 *  - brighntess depends on how hard the drum stick hits the drum pad
 *  Drum stick hitting drum pad is detected by a simple piezo sensor placed underneath the drum pad
 * 
 * Written by T. Geppert, April 2020
 */

/*
 * Constants and alike
 */
// LED stuff =============================================================================
// LED Ring / Stripe ---------------------------------------------------------------------
#include <FastLED.h>
#define NUM_LEDS 24                       // Number of LEDs in ring
#define LED_DATA_PIN 9                   // Data Pin for control of LEDs in strip 1

CRGB leds[NUM_LEDS];                    // create array for LED ring

#define LED_HUE_STD 13                       // STandarD HUE = "color" of LED; 0~red, 32~orange, 64~yellow
#define LED_SAT_STD 255                     // STandarD SATuration = saturation of color of LED; 0~neutral grey, 255~pure color
#define LED_VAL_STD 100 

int LED_HUE = LED_HUE_STD;                  // HUE used for FastLED depending on input conditions
int LED_SAT = LED_SAT_STD;                  // SAT used for FastLED depending on input conditions
int LED_VAL = LED_VAL_STD;                  // VAL used for FastLED depending on input conditions

// LED red/yellow/green ----------------------------------------------------------------------
#define LED_RED_PIN 3
#define LED_YELLOW_PIN 4
#define LED_GREEN_PIN 5

// Vibration sensor =============================================================================
#define VIB_SENS_PIN_1 A1                   // Input from vibration sensor 1
int VibRead_1;

// Other stuff =============================================================================
#define LEDMode_PIN A3
int trigLim = 100;                        // trigger limit for vibration sensor
int beatsCount = 0;                         // counts number of beats (limits for red, yellow, green can be set below)

int beatsRedLim = 192;
int beatsYellowLim = 384;
int beatsGreenLim = 1536;

int switchOnDelay = 2;                   // time  (ms) between switchin on subsequent LEDs

/*
 * Setup ===================================================================================
 */
void setup() {
  Serial.begin(9600);
  FastLED.addLeds<NEOPIXEL, LED_DATA_PIN>(leds, NUM_LEDS);    // setup LED ring

  pinMode(LED_DATA_PIN, OUTPUT);
  pinMode(LEDMode_PIN, INPUT);

  pinMode(LED_RED_PIN, OUTPUT);
  pinMode(LED_YELLOW_PIN, OUTPUT);
  pinMode(LED_GREEN_PIN, OUTPUT);

  pinMode(VIB_SENS_PIN_1, INPUT);

}
/*
 * End of Setup ===================================================================================
 */

/*
 * Main Loop ===================================================================================
 */
 
void loop() {
  LED_HUE = LED_HUE_STD;                  // HUE used for FastLED depending on input conditions
  LED_SAT = LED_SAT_STD;                  // SAT used for FastLED depending on input conditions
  LED_VAL = LED_VAL_STD;                  // VAL used for FastLED depending on input conditions

  // Wait until vibration sensor detects something
  VibRead_1 = 0;
  while( VibRead_1 < trigLim ) {
    VibRead_1 = analogRead(VIB_SENS_PIN_1);       // VibRead_1 used as trigger as well as determining brightness of LEDs
//Serial.println("Waiting for input from vibration sensor");
  }

  beatsCount = beatsCount + 1;                    // increase number of beats
  // turn on red, yellow or green LED, depending on number of total beats
  if (beatsCount <= beatsYellowLim) {
    digitalWrite(LED_RED_PIN, HIGH);
  }
  if (beatsCount > beatsYellowLim && beatsCount < beatsGreenLim) {
    digitalWrite(LED_YELLOW_PIN, HIGH);
  }
  if (beatsCount > beatsGreenLim) {
    digitalWrite(LED_GREEN_PIN, HIGH);
  }
  
  LED_VAL = map(VibRead_1, 0, 1023, 0, 255);      // derive brightness values for LEDs from magnitude of vibration
/*Serial.println();
Serial.println(VibRead_1);
Serial.println(LED_VAL);
*/  
/*Serial.print("Vib Sens 1: ");
Serial.print(VibSens_1);
Serial.print(" Vib Read 1: ");
Serial.println(VibRead_1);
*/
  
  int LEDMode = analogRead(LEDMode_PIN);  // value used for selection of color pattern
  
/*Serial.print("LEDMode: ");
Serial.println(LEDMode);
*/

  // set LED HUE etc. depending on input
  if (0 < LEDMode && LEDMode < 250) {
    LED_HUE = 2;
    for (int i=0; i<NUM_LEDS; i++) {
      leds[i]=CHSV(LED_HUE, LED_SAT, LED_VAL);
      FastLED.show();
      delay(switchOnDelay);
    }
  }
  if (250 < LEDMode && LEDMode < 500) {
    LED_HUE = 80;
    for (int i=0; i<NUM_LEDS; i++) {
      leds[i]=CHSV(LED_HUE, LED_SAT, LED_VAL);
      FastLED.show();
      delay(switchOnDelay);
    }
  }
  if (500 < LEDMode && LEDMode < 700) {
    LED_HUE = 150;
    for (int i=0; i<NUM_LEDS; i++) {
      leds[i]=CHSV(LED_HUE, LED_SAT, LED_VAL);
      FastLED.show();
      delay(switchOnDelay);
    }
  }
  if (700 < LEDMode && LEDMode < 1023) {
    for (int i=0; i<NUM_LEDS; i++) {
      leds[i]=CHSV(int(192/NUM_LEDS*i), LED_SAT, LED_VAL);
      FastLED.show();
      delay(switchOnDelay);
    }
  }

  //Turn all LEDs OFF
  digitalWrite(LED_RED_PIN, LOW);
  digitalWrite(LED_YELLOW_PIN, LOW);
  digitalWrite(LED_GREEN_PIN, LOW);
  for (int i=0; i<NUM_LEDS; i++) {
    LED_HUE = 0;
    LED_SAT = 0;
    LED_VAL = 0;
    leds[i]=CHSV(LED_HUE, LED_SAT, LED_VAL);
    FastLED.show();
    delay(switchOnDelay);
  }

}
/*
 * End of Main Loop  ===================================================================================
 */