2 digit Pixel LED Scoreboard Using Arduino

 

Here's a modular Arduino code that:

•     Controls a Pixel LED Seven Segment Display (e.g., made from WS2812 LEDs),
•     Lets you change the number of digits and LEDs per segment via code,
•     Uses debounce pushbuttons for:
•     Increasing and decreasing the displayed number (2 buttons),
•     Changing color (1 button),
•     Uses the Serial Monitor for debugging/logs.

✅ Hardware Assumptions

1.     WS2812 LEDs (a.k.a. NeoPixels),
2.     Each digit = 7 segments,
3.     LEDs per segment = configurable,
4.     Buttons connected to GPIO pins with pull-down or pull-up resistors,
5.     Powered adequately (use capacitor + resistor as per NeoPixel specs).

✅ Libraries Required

Install via Library Manager:

•     Adafruit_NeoPixel.h

✅ Wiring Example

• DIN (Data In) of LED → D6
• INC Button → D2
• DEC Button → D3
• Color Button → D4

////////////////////////////////////////////////////////

✅ Arduino Code

#include <Adafruit_NeoPixel.h>

// === CONFIGURATION ===

#define LED_PIN     6     // Data pin

#define NUM_DIGITS  2     // Total number of digits

#define LEDS_PER_SEGMENT 4 // Number of LEDs in each segment

#define COLOR_BUTTON 4

#define INC_BUTTON   2

#define DEC_BUTTON   3

#define DEBOUNCE_DELAY 50

const uint8_t segmentsPerDigit = 7;

const uint8_t totalSegments = NUM_DIGITS * segmentsPerDigit;

const uint16_t totalLEDs = totalSegments * LEDS_PER_SEGMENT;

Adafruit_NeoPixel strip(totalLEDs, LED_PIN, NEO_GRB + NEO_KHZ800);

unsigned long lastDebounceTimeInc = 0;

unsigned long lastDebounceTimeDec = 0;

unsigned long lastDebounceTimeColor = 0;

int currentNumber = 0;

int currentColorIndex = 0;

uint32_t colors[] = {

  strip.Color(255, 0, 0),

  strip.Color(0, 255, 0),

  strip.Color(0, 0, 255),

  strip.Color(255, 255, 0),

  strip.Color(0, 255, 255),

  strip.Color(255, 0, 255),

  strip.Color(255, 255, 255)

};

const int totalColors = sizeof(colors) / sizeof(colors[0]);

// === 7-Segment LED patterns ===

// a, b, c, d, e, f, g

const uint8_t digitSegments[10][7] = {

  {1,1,1,1,1,1,0}, // 0

  {0,0,1,1,0,0,0}, // 1

  {0,1,1,0,1,1,1}, // 2

  {0,1,1,1,1,0,1}, // 3

  {1,0,1,1,0,0,1}, // 4

  {1,1,0,1,1,0,1}, // 5

  {1,1,0,1,1,1,1}, // 6

  {0,1,1,1,0,0,0}, // 7

  {1,1,1,1,1,1,1}, // 8

  {1,1,1,1,1,0,1}  // 9

};

// === SEGMENT ORDER ===

// Segment index: f(0), a(1), b(2), c(3), d(4), e(5), g(6)

const int segmentOrder[7] = {0, 1, 2, 3, 4, 5, 6};

// === BUTTON STATE ===

bool lastIncState = LOW;

bool lastDecState = LOW;

bool lastColorState = LOW;

// === FUNCTION TO LIGHT A SEGMENT ===

void lightSegment(uint16_t segIndex, uint32_t color) {

  uint16_t startLED = segIndex * LEDS_PER_SEGMENT;

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

    strip.setPixelColor(startLED + i, color);

  }

}

// === DISPLAY NUMBER ===

void displayNumber(int number) {

  strip.clear();

  for (int d = 0; d < NUM_DIGITS; d++) {

    int digit = (number / (int)pow(10, NUM_DIGITS - 1 - d)) % 10;

    for (int s = 0; s < 7; s++) {

      if (digitSegments[digit][s]) {

        int segIndex = d * segmentsPerDigit + segmentOrder[s];

        lightSegment(segIndex, colors[currentColorIndex]);

      }

    }

  }

  strip.show();

  Serial.print("Number: "); Serial.println(number);

}

// === SETUP ===

void setup() {

  Serial.begin(9600);

  pinMode(COLOR_BUTTON, INPUT_PULLUP);

  pinMode(INC_BUTTON, INPUT_PULLUP);

  pinMode(DEC_BUTTON, INPUT_PULLUP);

  strip.begin();

  strip.show();

  displayNumber(currentNumber);

}

// === LOOP ===

void loop() {

  bool incState = !digitalRead(INC_BUTTON);

  bool decState = !digitalRead(DEC_BUTTON);

  bool colorState = !digitalRead(COLOR_BUTTON);

  unsigned long now = millis();

  // === INCREMENT ===

  if (incState && !lastIncState && now - lastDebounceTimeInc > DEBOUNCE_DELAY) {

    lastDebounceTimeInc = now;

    currentNumber++;

    if (currentNumber >= pow(10, NUM_DIGITS)) currentNumber = 0;

    displayNumber(currentNumber);

  }

  lastIncState = incState;

  // === DECREMENT ===

  if (decState && !lastDecState && now - lastDebounceTimeDec > DEBOUNCE_DELAY) {

    lastDebounceTimeDec = now;

    currentNumber--;

    if (currentNumber < 0) currentNumber = pow(10, NUM_DIGITS) - 1;

    displayNumber(currentNumber);

  }

  lastDecState = decState;

  // === CHANGE COLOR ===

  if (colorState && !lastColorState && now - lastDebounceTimeColor > DEBOUNCE_DELAY) {

    lastDebounceTimeColor = now;

    currentColorIndex = (currentColorIndex + 1) % totalColors;

    displayNumber(currentNumber);

    Serial.print("Color changed to index: "); Serial.println(currentColorIndex);

  }

  lastColorState = colorState;

}

✅ To Modify

•     To change number of digits, update NUM_DIGITS,
•     To change LEDs per segment, update LEDS_PER_SEGMENT,
•     Adjust pin numbers if you use different buttons or LED data lines.