1  // SPDX-FileCopyrightText: 2017 John Edgar Park for Adafruit Industries
  2  //
  3  // SPDX-License-Identifier: MIT
  4  
  5  //  NeoPixie Dust Bag by John Edgar Park jpixl.net
  6  //   
  7  //     No fairy costume is complete without a glowing pixie dust bag. 
  8  //     This one uses a touch sensor to cycle through colors on the beautifully twinkling NeoPixel rings, 
  9  //     controlled by the tiny Adafruit GEMMA microcontroller.
 10  //
 11  //     Build instructions: learn.adafruit.com/neopixel-pixie-dust-bag/overview
 12  //
 13  //  Some code based upon Adafruit GEMMA earring code and Adafruit NeoPixel buttoncycler code
 14  
 15  #include <Adafruit_NeoPixel.h>  //Include the NeoPixel library
 16  
 17  #define NEO_PIN 0        // DIGITAL IO pin for NeoPixel OUTPUT from GEMMA
 18  #define TOUCH_PIN 2      // DIGITAL IO pin for momentary touch sensor INPUT to GEMMA
 19  #define PIXEL_COUNT 30   // Number of NeoPixels connected to GEMMA
 20  #define DELAY_MILLIS 10  // delay between blinks, smaller numbers are faster 
 21  #define DELAY_MULT 8     // Randomization multiplier on the delay speed of the effect
 22  #define BRIGHT 100        // Brightness of the pixels, max is 255
 23  
 24  // Parameter 1 = number of pixels in strip
 25  // Parameter 2 = pin number on Arduino (most are valid)
 26  // Parameter 3 = pixel type flags, add together as needed:
 27  //   NEO_RGB     Pixels are wired for RGB bitstream (v1 FLORA pixels, not v2)
 28  //   NEO_GRB     Pixels are wired for GRB bitstream, correct for neopixel stick (most NeoPixel products)
 29  //   NEO_KHZ400  400 KHz bitstream (e.g. FLORA pixels)
 30  //   NEO_KHZ800  800 KHz bitstream (e.g. High Density LED strip), correct for neopixel stick
 31  Adafruit_NeoPixel pixels = Adafruit_NeoPixel(PIXEL_COUNT, NEO_PIN, NEO_GRB + NEO_KHZ800);
 32  
 33  bool oldState = HIGH; //sets the initial variable for counting touch sensor button pushes
 34  int showColor = 0;    //color mode for cycling
 35  
 36  void setup() {
 37    pinMode(TOUCH_PIN, INPUT);    //Initialize touch sensor pin as input using external pull-up resistor
 38    pixels.begin();
 39    pixels.setBrightness(BRIGHT);
 40    pixels.show();                //Set all pixels to "off"
 41  }
 42  
 43  
 44  void loop() {
 45    int RColor = 100; //color (0-255) values to be set by cylcing touch switch, initially GOLD
 46    int GColor = 0 ;
 47    int BColor = 0 ;
 48    
 49         if (showColor==0) {//Garden PINK
 50           RColor = 242;
 51           GColor = 90;
 52           BColor = 255; 
 53         }
 54         if (showColor==1) {//Pixie GOLD
 55           RColor = 255;
 56           GColor = 222;
 57           BColor = 30; 
 58         }
 59         if (showColor==2) {//Alchemy BLUE
 60           RColor = 50;
 61           GColor = 255;
 62           BColor = 255; 
 63         }
 64         if (showColor==3) {//Animal ORANGE
 65           RColor = 255;
 66           GColor = 100;
 67           BColor = 0; 
 68         }
 69         if (showColor==4) {//Tinker GREEN
 70           RColor = 0;
 71           GColor = 255;
 72           BColor = 40; 
 73         }
 74    
 75    //sparkling
 76    int p = random(PIXEL_COUNT); //select a random pixel
 77    pixels.setPixelColor(p,RColor,GColor,BColor); //color value comes from cycling state of momentary switch
 78    pixels.show();
 79    delay(DELAY_MILLIS * random(DELAY_MULT) ); //delay value randomized to up to DELAY_MULT times longer
 80    pixels.setPixelColor(p, RColor/10, GColor/10, BColor/10); //set to a dimmed version of the state color
 81    pixels.show();
 82    pixels.setPixelColor(p+1, RColor/15, GColor/15, BColor/15); //set a neighbor pixel to an even dimmer value
 83    pixels.show();
 84    
 85    //button check to cycle through color value sets
 86    bool newState = digitalRead(TOUCH_PIN); //Get the current button state
 87    // Check if state changed from high to low (button press).
 88    if (newState == LOW && oldState == HIGH) {
 89      // Short delay to debounce button.
 90      delay(20);
 91      // Check if button is still low after debounce.
 92      newState = digitalRead(TOUCH_PIN);
 93      if (newState == LOW) {
 94        showColor++;
 95        if (showColor > 4)
 96          showColor=0;
 97         }   
 98    }
 99    // Set the last button state to the old state.
100    oldState = newState;  
101    
102  }