I made a eye-ball using LED Tape Neopixel. It blink and pupil is moved to the left and right.

Structure

Parts

Microcontroller Arduino Pro Mini 328 5v 16MHz

　
Bending sensor 55mm

　
Full color serial LED tape Neopixel

　
Slide switch

Equipment overview

This Eye-ball has Grip and Trigger. When Grip (VR 10kohm) is turned, pupil　move to the left and right. When Trigger is pulled, Bend Sensor is bended and blink.

LED Eye Ball

　
Neopixel LED tape is used. LED is 68 unit. LED is fixed to the bowl with double-sided tape and wired in the following order.

Operating mode

Eye-ball has two slide switch for mode select.

Demo mode: LED shines in a variety of patterns
Color adjustment mode: pupil color change by turning grip
Brightness adjustment: LED brightness change by turning grip

Arduino IDE Code

The following Neopixel libraries are used:
　https://github.com/adafruit/Adafruit_NeoPixel

#include <Adafruit_NeoPixel.h>
#ifdef __AVR__
  #include <avr/power.h>
#endif

#define PIN 6

Adafruit_NeoPixel led = Adafruit_NeoPixel(68, PIN, NEO_GRB + NEO_KHZ800);

int blackNum = 24;
int pupilNum = 12;

int colorMode1[10] = {7,8,15,18,29,38,49,52,59,60};
int colorMode2[2] = {18,49};
int colorMode3[2] = {7,60};
int colorMode4[2] = {8,59};
int brightMode1[15] = {7,8,9,15,18,26,29,38,39,40,49,52,58,59,60};
int brightMode2[3] = {18,26,49};
int brightMode3[3] = {7,40,60};
int brightMode4[3] = {8,39,59};

//Black eye L&R animation
int blackLED[15][24] = {{12,32,35,55,68,68,68,68,68,68,68,68,68,68,68,68,68,68,68,68,68,68,68,68},
                        {12,13,31,36,54,55,68,68,68,68,68,68,68,68,68,68,68,68,68,68,68,68,68,68},
                        {11,13,14,30,37,53,54,56,68,68,68,68,68,68,68,68,68,68,68,68,68,68,68,68},
                        {10,11,14,15,29,38,52,53,56,57,68,68,68,68,68,68,68,68,68,68,68,68,68,68},
                        { 9,10,11,12,15,16,28,33,34,39,51,52,55,56,57,58,68,68,68,68,68,68,68,68},
                        { 0, 8, 9,10,11,12,13,16,17,27,32,35,40,50,51,54,55,56,57,58,59,67,68,68},
                        { 0, 1, 7, 8, 9,10,13,14,17,18,26,31,36,41,49,50,53,54,57,58,59,60,66,67},
                        { 1, 2, 6, 7, 8, 9,14,15,18,19,25,30,37,42,48,49,52,53,58,59,60,61,65,66},
                        { 2, 3, 5, 6, 7, 8,15,16,19,20,24,29,38,43,47,48,51,52,59,60,61,62,64,65},
                        { 3, 4, 5, 6, 7,16,17,20,21,23,28,39,44,46,47,50,51,60,61,62,63,64,68,68},
                        { 4, 5, 6,17,18,21,22,27,40,45,46,49,50,61,62,63,68,68,68,68,68,68,68,68},
                        { 4, 5,18,19,26,41,48,49,62,68,68,68,68,68,68,68,68,68,68,68,68,68,68,68},
                        { 4,19,20,25,42,47,48,63,68,68,68,68,68,68,68,68,68,68,68,68,68,68,68,68},
                        {20,21,24,43,46,47,68,68,68,68,68,68,68,68,68,68,68,68,68,68,68,68,68,68},
                        {21,23,44,46,68,68,68,68,68,68,68,68,68,68,68,68,68,68,68,68,68,68,68,68}};

//pupil L&R animation
int pupilLED[15][12] = {{33,34,68,68,68,68,68,68,68,68,68,68},
                        {32,33,34,35,68,68,68,68,68,68,68,68},
                        {12,31,32,33,34,35,36,55,68,68,68,68},
                        {12,13,30,31,32,33,34,35,36,37,54,55},
                        {13,14,29,30,31,32,35,36,37,38,53,54},
                        {14,15,28,29,30,31,36,37,38,39,52,53},
                        {15,16,27,28,29,30,37,38,39,40,51,52},
                        {16,17,26,27,28,29,38,39,40,41,50,51},
                        {17,18,25,26,27,28,39,40,41,42,49,50},
                        {18,19,24,25,26,27,40,41,42,43,48,49},
                        {19,20,23,24,25,26,41,42,43,44,47,48},
                        {20,21,22,23,24,25,42,43,44,45,46,47},
                        {21,22,23,24,43,44,45,46,68,68,68,68},
                        {22,23,44,45,68,68,68,68,68,68,68,68},
                        {22,45,68,68,68,68,68,68,68,68,68,68}};

//Blink animation
int eyelidMode = 0;
int eyelidNum[8] = {0,4,8,16,24,34,44,56};
int eyelidLED[56] = {64,65,66,67,58,59,60,61,56,57,62,63,49,50,51,52,47,48,53,54,38,39,40,41,46,55,36,37,42,43,26,27,28,29,35,44,24,25,30,31,15,16,17,18,34,45,23,32,13,14,19,20,6,7,8,9};

//Bending sensor for Blink
int sensorPin = A5;
int sensorValue = 0;

/*
opration mode
10: demo
00: color adjustment
11: brightness adjustment (0-127)
01: normal
*/
uint32_t color;
int brightness = 40;
int modePin[2] = {11, 12};
int modeVal = 3;

//10kohm volume for adjustment and L&R animation
int pinVR = A4;
int valVR = 1;
int valVRMap = 0;

int waitState = 0;
int demoCnt = 0;


void setup() {
  // This is for Trinket 5V 16MHz, you can remove these three lines if you are not using a Trinket
  #if defined (__AVR_ATtiny85__)
    if (F_CPU == 16000000) clock_prescale_set(clock_div_1);
  #endif
  // End of trinket special code

  Serial.begin(115200);

  pinMode(modePin[0], INPUT_PULLUP);
  pinMode(modePin[1], INPUT_PULLUP);

  led.begin();
  led.setBrightness(brightness); // Initial Brightness 40
  led.show(); // Initialize all pixels to 'off'
  color = led.Color(0, 177, 55); // Initial pupil color
}

void loop() {
  modeVal = modeSel();

  //demo mode
  if (modeVal == 2){
    waitState = 0;
    led.clear();
    led.show();
    
    switch (demoCnt) {
      case 0:
        colorWipe(led.Color(127, 0, 0), 50); // Red
        break;
      case 1:
        colorWipe(led.Color(0, 127, 0), 50); // Green
        break;
      case 2:
        colorWipe(led.Color(0, 0, 127), 50); // Blue
        break;
      case 3:
        theaterChase(led.Color(127, 127, 127), 50); // White
        break;
      case 4:
        theaterChase(led.Color(127, 0, 0), 50); // Red
        break;
      case 5:
        theaterChase(led.Color(0, 0, 127), 50); // Blue
        break;
      case 6:
        rainbow(20);
        break;
      case 7:
        rainbowCycle(20);
        break;
      case 8:
        theaterChaseRainbow(50);
        break;
      case 9:
        demoCnt = 0;
        break;
      }
  }

  //color adjustment mode
  if (modeVal == 0){
    if (waitState == 0) {
      led.clear();
      led.show();
      for(uint16_t i=0; i<10; i++) {
        led.setPixelColor(colorMode1[i], color);
      }
      led.show();
      if (modeSel() != 0){return;}
      delay(800);
      for(uint16_t i=0; i<2; i++) {
        led.setPixelColor(colorMode2[i], 0);
      }
      led.show();
      if (modeSel() != 0){return;}
      delay(400);
      for(uint16_t i=0; i<2; i++) {
        led.setPixelColor(colorMode3[i], 0);
      }
      led.show();
      if (modeSel() != 0){return;}
      delay(400);
      for(uint16_t i=0; i<2; i++) {
        led.setPixelColor(colorMode4[i], 0);
      }
      led.show();
      if (modeSel() != 0){return;}
      delay(400);
      led.clear();
      led.show();
      if (modeSel() != 0){return;}
      delay(400);
      waitState = 1;
    }
    if (modeSel() != 0){return;}
    valVR = analogRead(pinVR);
    valVRMap = map(valVR, 0, 512, 0, 255);
    if (valVRMap > 255) {
      valVRMap = 255;
    }
    if (valVRMap < 0) {
      valVRMap = 0;
    }
    
    color = Wheel(valVRMap);
    blink(0, 7);
  }

  //brightness adjustment mode
  if (modeVal == 3){
    if (waitState == 0) {
      led.clear();
      led.show();
      for(uint16_t i=0; i<15; i++) {
        led.setPixelColor(brightMode1[i], color);
      }
      led.show();
      if (modeSel() != 3){return;}
      delay(800);
      for(uint16_t i=0; i<3; i++) {
        led.setPixelColor(brightMode2[i], 0);
      }
      led.show();
      if (modeSel() != 3){return;}
      delay(400);
      for(uint16_t i=0; i<3; i++) {
        led.setPixelColor(brightMode3[i], 0);
      }
      led.show();
      if (modeSel() != 3){return;}
      delay(400);
      for(uint16_t i=0; i<3; i++) {
        led.setPixelColor(brightMode4[i], 0);
      }
      led.show();
      if (modeSel() != 3){return;}
      delay(400);
      led.clear();
      led.show();
      if (modeSel() != 3){return;}
      delay(400);
      waitState = 1;
    }
    if (modeSel() != 3){return;}
    valVR = analogRead(pinVR);
    valVRMap = map(valVR, 0, 512, 3, 70);
    if (valVRMap > 70) {
      valVRMap = 70;
    }
    if (valVRMap < 0) {
      valVRMap = 0;
    }
    
    Serial.print(valVR);
    Serial.print("\t");
    Serial.println(valVRMap);
    
    brightness = valVRMap;
    led.setBrightness(brightness);
    blink(0, 7);
  }

  //normal mode
  if (modeVal == 1) {
    waitState = 0;

    sensorValue = analogRead(sensorPin);
    eyelidMode = map(sensorValue, 770, 815, 0, 8);
    if (eyelidMode > 8) {
      eyelidMode = 8;
    }
    if (eyelidMode < 0) {
      eyelidMode = 0;
    }

    valVR = analogRead(pinVR);
    valVRMap = map(valVR, 314, 456, 14, 0);
    if (valVRMap > 14) {
      valVRMap = 14;
    }
    if (valVRMap < 0) {
      valVRMap = 0;
    }
    
    blink(eyelidMode, valVRMap);
  }
}

byte modeSel(){
  int i,j=0;
  //Get the mode switches state
  for (i=0; i<2; i++) {
    j = (j << 1) | digitalRead(modePin[i]);   // read each input pin
  }
  return j; //return address
}

void blink(int eyelid, int LR) {
  if (eyelid != 8){
    //Pewter
    for(uint16_t i=0; i<led.numPixels(); i++) {
      led.setPixelColor(i, led.Color(66, 66, 66));
    }
    
    //Black eye
    for(uint16_t i=0; i<blackNum; i++) {
      led.setPixelColor(blackLED[LR][i], color);
    }
    
    //pupil
    for(uint16_t i=0; i<pupilNum; i++) {
      led.setPixelColor(pupilLED[LR][i], led.Color(0, 0, 66));
    }

    //eyelid
    for(int i=0; i < eyelidNum[eyelid]; i++) {
      led.setPixelColor(eyelidLED[i], 0);
    }
  } else if (eyelid == 8){
    led.clear();
  }
  led.show();
}

// Fill the dots one after the other with a color
void colorWipe(uint32_t c, uint8_t wait) {
  for(uint16_t i=0; i < led.numPixels(); i++) {
    led.setPixelColor(i, c);
    if (modeSel() != 2){return;}
    led.show();
    delay(wait);
  }
  demoCnt++;
}

//Theatre-style crawling lights.
void theaterChase(uint32_t c, uint8_t wait) {
  for (int j=0; j<10; j++) {  //do 10 cycles of chasing
    for (int q=0; q < 3; q++) {
      for (int i=0; i < led.numPixels(); i=i+3) {
        led.setPixelColor(i+q, c);    //turn every third pixel on
        if (modeSel() != 2){return;}
      }
      led.show();
      delay(wait);
      
      for (int i=0; i < led.numPixels(); i=i+3) {
        led.setPixelColor(i+q, 0);        //turn every third pixel off
      }
    }
  }
  demoCnt++;
}

void rainbow(uint8_t wait) {
  uint16_t i, j;

  for(j=0; j<256; j++) {
    for(i=0; i<led.numPixels(); i++) {
      led.setPixelColor(i, Wheel((i+j) & 255));
      if (modeSel() != 2){return;}
    }
    led.show();
    delay(wait);
  }
  demoCnt++;
}

// Slightly different, this makes the rainbow equally distributed throughout
void rainbowCycle(uint8_t wait) {
  uint16_t i, j;

  for(j=0; j<256*5; j++) { // 5 cycles of all colors on wheel
    for(i=0; i< led.numPixels(); i++) {
      led.setPixelColor(i, Wheel(((i * 256 / led.numPixels()) + j) & 255));
      if (modeSel() != 2){return;}
    }
    led.show();
    delay(wait);
  }
  demoCnt++;
}

//Theatre-style crawling lights with rainbow effect
void theaterChaseRainbow(uint8_t wait) {
  for (int j=0; j < 256; j++) {     // cycle all 256 colors in the wheel
    for (int q=0; q < 3; q++) {
      for (int i=0; i < led.numPixels(); i=i+3) {
        led.setPixelColor(i+q, Wheel( (i+j) % 255));    //turn every third pixel on
        if (modeSel() != 2){return;}
      }
      led.show();
      delay(wait);

      for (int i=0; i < led.numPixels(); i=i+3) {
        led.setPixelColor(i+q, 0);        //turn every third pixel off
      }
    }
  }
  demoCnt++;
}

// Input a value 0 to 255 to get a color value.
// The colours are a transition r - g - b - back to r.
uint32_t Wheel(byte WheelPos) {
  WheelPos = 255 - WheelPos;
  if(WheelPos < 85) {
    return led.Color(255 - WheelPos * 3, 0, WheelPos * 3);
  }
  if(WheelPos < 170) {
    WheelPos -= 85;
    return led.Color(0, WheelPos * 3, 255 - WheelPos * 3);
  }
  WheelPos -= 170;
  return led.Color(WheelPos * 3, 255 - WheelPos * 3, 0);
}

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#include <Adafruit_NeoPixel.h>

#ifdef __AVR__

#include <avr/power.h>

#endif

#define PIN 6

Adafruit_NeoPixel led = Adafruit_NeoPixel(68, PIN, NEO_GRB + NEO_KHZ800);

int blackNum = 24;

int pupilNum = 12;

int colorMode1[10] = {7,8,15,18,29,38,49,52,59,60};

int colorMode2[2] = {18,49};

int colorMode3[2] = {7,60};

int colorMode4[2] = {8,59};

int brightMode1[15] = {7,8,9,15,18,26,29,38,39,40,49,52,58,59,60};

int brightMode2[3] = {18,26,49};

int brightMode3[3] = {7,40,60};

int brightMode4[3] = {8,39,59};

//Black eye L&R animation

int blackLED[15][24] = {{12,32,35,55,68,68,68,68,68,68,68,68,68,68,68,68,68,68,68,68,68,68,68,68},

{12,13,31,36,54,55,68,68,68,68,68,68,68,68,68,68,68,68,68,68,68,68,68,68},

{11,13,14,30,37,53,54,56,68,68,68,68,68,68,68,68,68,68,68,68,68,68,68,68},

{10,11,14,15,29,38,52,53,56,57,68,68,68,68,68,68,68,68,68,68,68,68,68,68},

{ 9,10,11,12,15,16,28,33,34,39,51,52,55,56,57,58,68,68,68,68,68,68,68,68},

{ 0, 8, 9,10,11,12,13,16,17,27,32,35,40,50,51,54,55,56,57,58,59,67,68,68},

{ 0, 1, 7, 8, 9,10,13,14,17,18,26,31,36,41,49,50,53,54,57,58,59,60,66,67},

{ 1, 2, 6, 7, 8, 9,14,15,18,19,25,30,37,42,48,49,52,53,58,59,60,61,65,66},

{ 2, 3, 5, 6, 7, 8,15,16,19,20,24,29,38,43,47,48,51,52,59,60,61,62,64,65},

{ 3, 4, 5, 6, 7,16,17,20,21,23,28,39,44,46,47,50,51,60,61,62,63,64,68,68},

{ 4, 5, 6,17,18,21,22,27,40,45,46,49,50,61,62,63,68,68,68,68,68,68,68,68},

{ 4, 5,18,19,26,41,48,49,62,68,68,68,68,68,68,68,68,68,68,68,68,68,68,68},

{ 4,19,20,25,42,47,48,63,68,68,68,68,68,68,68,68,68,68,68,68,68,68,68,68},

{20,21,24,43,46,47,68,68,68,68,68,68,68,68,68,68,68,68,68,68,68,68,68,68},

{21,23,44,46,68,68,68,68,68,68,68,68,68,68,68,68,68,68,68,68,68,68,68,68}};

//pupil L&R animation

int pupilLED[15][12] = {{33,34,68,68,68,68,68,68,68,68,68,68},

{32,33,34,35,68,68,68,68,68,68,68,68},

{12,31,32,33,34,35,36,55,68,68,68,68},

{12,13,30,31,32,33,34,35,36,37,54,55},

{13,14,29,30,31,32,35,36,37,38,53,54},

{14,15,28,29,30,31,36,37,38,39,52,53},

{15,16,27,28,29,30,37,38,39,40,51,52},

{16,17,26,27,28,29,38,39,40,41,50,51},

{17,18,25,26,27,28,39,40,41,42,49,50},

{18,19,24,25,26,27,40,41,42,43,48,49},

{19,20,23,24,25,26,41,42,43,44,47,48},

{20,21,22,23,24,25,42,43,44,45,46,47},

{21,22,23,24,43,44,45,46,68,68,68,68},

{22,23,44,45,68,68,68,68,68,68,68,68},

{22,45,68,68,68,68,68,68,68,68,68,68}};

//Blink animation

int eyelidMode = 0;

int eyelidNum[8] = {0,4,8,16,24,34,44,56};

int eyelidLED[56] = {64,65,66,67,58,59,60,61,56,57,62,63,49,50,51,52,47,48,53,54,38,39,40,41,46,55,36,37,42,43,26,27,28,29,35,44,24,25,30,31,15,16,17,18,34,45,23,32,13,14,19,20,6,7,8,9};

//Bending sensor for Blink

int sensorPin = A5;

int sensorValue = 0;

opration mode

10: demo

00: color adjustment

11: brightness adjustment (0-127)

01: normal

uint32_t color;

int brightness = 40;

int modePin[2] = {11, 12};

int modeVal = 3;

//10kohm volume for adjustment and L&R animation

int pinVR = A4;

int valVR = 1;

int valVRMap = 0;

int waitState = 0;

int demoCnt = 0;

void setup() {

// This is for Trinket 5V 16MHz, you can remove these three lines if you are not using a Trinket

#if defined (__AVR_ATtiny85__)

if (F_CPU == 16000000) clock_prescale_set(clock_div_1);

#endif

// End of trinket special code

Serial.begin(115200);

pinMode(modePin[0], INPUT_PULLUP);

pinMode(modePin[1], INPUT_PULLUP);

led.begin();

led.setBrightness(brightness); // Initial Brightness 40

led.show(); // Initialize all pixels to 'off'

color = led.Color(0, 177, 55); // Initial pupil color

}

void loop() {

modeVal = modeSel();

//demo mode

if (modeVal == 2){

waitState = 0;

led.clear();

led.show();

switch (demoCnt) {

case 0:

colorWipe(led.Color(127, 0, 0), 50); // Red

break;

case 1:

colorWipe(led.Color(0, 127, 0), 50); // Green

break;

case 2:

colorWipe(led.Color(0, 0, 127), 50); // Blue

break;

case 3:

theaterChase(led.Color(127, 127, 127), 50); // White

break;

case 4:

theaterChase(led.Color(127, 0, 0), 50); // Red

break;

case 5:

theaterChase(led.Color(0, 0, 127), 50); // Blue

break;

case 6:

rainbow(20);

break;

case 7:

rainbowCycle(20);

break;

case 8:

theaterChaseRainbow(50);

break;

case 9:

demoCnt = 0;

break;

}

//color adjustment mode

if (modeVal == 0){

if (waitState == 0) {

led.clear();

led.show();

for(uint16_t i=0; i<10; i++) {

led.setPixelColor(colorMode1[i], color);

}

led.show();

if (modeSel() != 0){return;}

delay(800);

for(uint16_t i=0; i<2; i++) {

led.setPixelColor(colorMode2[i], 0);

}

led.show();

if (modeSel() != 0){return;}

delay(400);

for(uint16_t i=0; i<2; i++) {

led.setPixelColor(colorMode3[i], 0);

}

led.show();

if (modeSel() != 0){return;}

delay(400);

for(uint16_t i=0; i<2; i++) {

led.setPixelColor(colorMode4[i], 0);

}

led.show();

if (modeSel() != 0){return;}

delay(400);

led.clear();

led.show();

if (modeSel() != 0){return;}

delay(400);

waitState = 1;

}

if (modeSel() != 0){return;}

valVR = analogRead(pinVR);

valVRMap = map(valVR, 0, 512, 0, 255);

if (valVRMap > 255) {

valVRMap = 255;

}

if (valVRMap < 0) {

valVRMap = 0;

}

color = Wheel(valVRMap);

blink(0, 7);

}

//brightness adjustment mode

if (modeVal == 3){

if (waitState == 0) {

led.clear();

led.show();

for(uint16_t i=0; i<15; i++) {

led.setPixelColor(brightMode1[i], color);

}

led.show();

if (modeSel() != 3){return;}

delay(800);

for(uint16_t i=0; i<3; i++) {

led.setPixelColor(brightMode2[i], 0);

}

led.show();

if (modeSel() != 3){return;}

delay(400);

for(uint16_t i=0; i<3; i++) {

led.setPixelColor(brightMode3[i], 0);

}

led.show();

if (modeSel() != 3){return;}

delay(400);

for(uint16_t i=0; i<3; i++) {

led.setPixelColor(brightMode4[i], 0);

}

led.show();

if (modeSel() != 3){return;}

delay(400);

led.clear();

led.show();

if (modeSel() != 3){return;}

delay(400);

waitState = 1;

}

if (modeSel() != 3){return;}

valVR = analogRead(pinVR);

valVRMap = map(valVR, 0, 512, 3, 70);

if (valVRMap > 70) {

valVRMap = 70;

}

if (valVRMap < 0) {

valVRMap = 0;

}

Serial.print(valVR);

Serial.print("\t");

Serial.println(valVRMap);

brightness = valVRMap;

led.setBrightness(brightness);

blink(0, 7);

}

//normal mode

if (modeVal == 1) {

waitState = 0;

sensorValue = analogRead(sensorPin);

eyelidMode = map(sensorValue, 770, 815, 0, 8);

if (eyelidMode > 8) {

eyelidMode = 8;

}

if (eyelidMode < 0) {

eyelidMode = 0;

}

valVR = analogRead(pinVR);

valVRMap = map(valVR, 314, 456, 14, 0);

if (valVRMap > 14) {

valVRMap = 14;

}

if (valVRMap < 0) {

valVRMap = 0;

}

blink(eyelidMode, valVRMap);

}

byte modeSel(){

int i,j=0;

//Get the mode switches state

for (i=0; i<2; i++) {

j = (j << 1) | digitalRead(modePin[i]); // read each input pin

}

return j; //return address

}

void blink(int eyelid, int LR) {

if (eyelid != 8){

//Pewter

for(uint16_t i=0; i<led.numPixels(); i++) {

led.setPixelColor(i, led.Color(66, 66, 66));

}

//Black eye

for(uint16_t i=0; i<blackNum; i++) {

led.setPixelColor(blackLED[LR][i], color);

}

//pupil

for(uint16_t i=0; i<pupilNum; i++) {

led.setPixelColor(pupilLED[LR][i], led.Color(0, 0, 66));

}

//eyelid

for(int i=0; i < eyelidNum[eyelid]; i++) {

led.setPixelColor(eyelidLED[i], 0);

}

} else if (eyelid == 8){

led.clear();

}

led.show();

}

// Fill the dots one after the other with a color

void colorWipe(uint32_t c, uint8_t wait) {

for(uint16_t i=0; i < led.numPixels(); i++) {

led.setPixelColor(i, c);

if (modeSel() != 2){return;}

led.show();

delay(wait);

}

demoCnt++;

}

//Theatre-style crawling lights.

void theaterChase(uint32_t c, uint8_t wait) {

for (int j=0; j<10; j++) { //do 10 cycles of chasing

for (int q=0; q < 3; q++) {

for (int i=0; i < led.numPixels(); i=i+3) {

led.setPixelColor(i+q, c); //turn every third pixel on

if (modeSel() != 2){return;}

}

led.show();

delay(wait);

for (int i=0; i < led.numPixels(); i=i+3) {

led.setPixelColor(i+q, 0); //turn every third pixel off

}

demoCnt++;

}

void rainbow(uint8_t wait) {

uint16_t i, j;

for(j=0; j<256; j++) {

for(i=0; i<led.numPixels(); i++) {

led.setPixelColor(i, Wheel((i+j) & 255));

if (modeSel() != 2){return;}

}

led.show();

delay(wait);

}

demoCnt++;

}

// Slightly different, this makes the rainbow equally distributed throughout

void rainbowCycle(uint8_t wait) {

uint16_t i, j;

for(j=0; j<256*5; j++) { // 5 cycles of all colors on wheel

for(i=0; i< led.numPixels(); i++) {

led.setPixelColor(i, Wheel(((i * 256 / led.numPixels()) + j) & 255));

if (modeSel() != 2){return;}

}

led.show();

delay(wait);

}

demoCnt++;

}

//Theatre-style crawling lights with rainbow effect

void theaterChaseRainbow(uint8_t wait) {

for (int j=0; j < 256; j++) { // cycle all 256 colors in the wheel

for (int q=0; q < 3; q++) {

for (int i=0; i < led.numPixels(); i=i+3) {

led.setPixelColor(i+q, Wheel( (i+j) % 255)); //turn every third pixel on

if (modeSel() != 2){return;}

}

led.show();

delay(wait);

for (int i=0; i < led.numPixels(); i=i+3) {

led.setPixelColor(i+q, 0); //turn every third pixel off

}

demoCnt++;

}

// Input a value 0 to 255 to get a color value.

// The colours are a transition r - g - b - back to r.

uint32_t Wheel(byte WheelPos) {

WheelPos = 255 - WheelPos;

if(WheelPos < 85) {

return led.Color(255 - WheelPos * 3, 0, WheelPos * 3);

}

if(WheelPos < 170) {

WheelPos -= 85;

return led.Color(0, WheelPos * 3, 255 - WheelPos * 3);

}

WheelPos -= 170;

return led.Color(WheelPos * 3, 255 - WheelPos * 3, 0);

}

Operation

It was a fun Halloween!

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Structure

Parts

Equipment overview

LED Eye Ball

Operating mode

Arduino IDE Code

Operation

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