DIY Christmas Tree with Lights and Music | Simple Christmas Tree idea

DIY Christmas Tree with Lights and Music | Simple Christmas Tree idea

Hello and welcome back! In this project, we will learn how to make an electronic Christmas tree using the ATtiny85. I chose the ATtiny85 because I wanted the design to be small and compact. This project includes 16 SMD LEDs to decorate the Christmas tree with bright, colorful lights. A small buzzer is also added to play a cheerful Christmas tune. You can change it as you like. Also, you can easily power this Christmas tree with a coin battery or other power supply. I used an Arduino UNO board to power up this Christmas tree. Also, I created a Christmas tree shape for the PCB to make the project look unique. For that, I used JLCPCB to manufacture the PCB because they provide high-quality boards at an affordable price. This project is perfect as a decoration or even a small gift during the holiday season.

Ok, let’s do this project step by step. The required components are given below.

  • ATtiny85 Microcontroller x 1 — Our store / Amazon
  • 8 Pin IC socket x 1 — Our store / Amazon
  • 0805 Red LED x 3 — Our store / Amazon
  • 0805 Green LED x 4 — Our store / Amazon
  • 0805 Yellow LED x 4 — Our store / Amazon
  • 0805 Blue LED x 5 — Our store / Amazon
  • 0805 470 Ohm Resistor x 16 — Our store / Amazon
  • 74HC595 shift register x 2 — Our store / Amazon
  • 5v Active buzzer x 1 — Our store / Amazon
  • DIP slide switch x 1 — Our store / Amazon
  • SMD battery holder — Our store / Amazon
  • Arduino UNO board — Our store / Amazon
  • Jumper wires — Our store / Amazon

Disclosure: These Amazon links are Affiliate links. As an Amazon Associate, I earn from qualifying purchases.

Step 1

Firstly, identify these components.

Step 2

Secondly, let’s order the Christmas tree PCBs. Follow the instructions below.

  • Now, click on the “Instant Quote” button and upload the Gerber file. You can download the file using the link provided below.
  • Gerber file — Download
  • I ordered five green PCBs. Next, select the build time and shipping options, and then click the “Save to Cart” button.

Step 3

Thirdly, unbox your PCB package.

Step 4

Now, solder the SMD LEDs and resistors using a hot air gun or a hot plate.

Step 5

Next, solder the shift registers and the battery holder.

Step 6

Afterward, solder the remaining components using a soldering iron.

Step 7

Now, connect the Christmas tree to the Arduino UNO board to upload the program. After, connect the Arduino board to the computer.

  • RCK — D13
  • MISO — D12
  • MOSI — D11
  • RST — D10
  • Now, you need to set up the ATtiny85 board in your Arduino IDE. For that, you can follow this tutorial.
  • Afterward, copy and paste the following program into the Arduino IDE.
  • Code and Gerber file — Download
#include <ShiftRegister74HC595.h> // Include library
ShiftRegister74HC595<2> led(1, 2, 3); //<number of shiftregisters>object name(data pin, clock pin, latch pin)

#define BUZZER_PIN 4 

// Notes for "Jingle Bells"
#define NOTE_B0  31
#define NOTE_C1  33
#define NOTE_CS1 35
#define NOTE_D1  37
#define NOTE_DS1 39
#define NOTE_E1  41
#define NOTE_F1  44
#define NOTE_FS1 46
#define NOTE_G1  49
#define NOTE_GS1 52
#define NOTE_A1  55
#define NOTE_AS1 58
#define NOTE_B1  62
#define NOTE_C2  65
#define NOTE_CS2 69
#define NOTE_D2  73
#define NOTE_DS2 78
#define NOTE_E2  82
#define NOTE_F2  87
#define NOTE_FS2 93
#define NOTE_G2  98
#define NOTE_GS2 104
#define NOTE_A2  110
#define NOTE_AS2 117
#define NOTE_B2  123
#define NOTE_C3  131
#define NOTE_CS3 139
#define NOTE_D3  147
#define NOTE_DS3 156
#define NOTE_E3  165
#define NOTE_F3  175
#define NOTE_FS3 185
#define NOTE_G3  196
#define NOTE_GS3 208
#define NOTE_A3  220
#define NOTE_AS3 233
#define NOTE_B3  247
#define NOTE_C4  262
#define NOTE_CS4 277
#define NOTE_D4  294
#define NOTE_DS4 311
#define NOTE_E4  330
#define NOTE_F4  349
#define NOTE_FS4 370
#define NOTE_G4  392
#define NOTE_GS4 415
#define NOTE_A4  440
#define NOTE_AS4 466
#define NOTE_B4  494
#define NOTE_C5  523
#define NOTE_CS5 554
#define NOTE_D5  587
#define NOTE_DS5 622
#define NOTE_E5  659
#define NOTE_F5  698
#define NOTE_FS5 740
#define NOTE_G5  784
#define NOTE_GS5 831
#define NOTE_A5  880
#define NOTE_AS5 932
#define NOTE_B5  988
#define NOTE_C6  1047
#define NOTE_CS6 1109
#define NOTE_D6  1175
#define NOTE_DS6 1245
#define NOTE_E6  1319
#define NOTE_F6  1397
#define NOTE_FS6 1480
#define NOTE_G6  1568
#define NOTE_GS6 1661
#define NOTE_A6  1760
#define NOTE_AS6 1865
#define NOTE_B6  1976
#define NOTE_C7  2093
#define NOTE_CS7 2217
#define NOTE_D7  2349
#define NOTE_DS7 2489
#define NOTE_E7  2637
#define NOTE_F7  2794
#define NOTE_FS7 2960
#define NOTE_G7  3136
#define NOTE_GS7 3322
#define NOTE_A7  3520
#define NOTE_AS7 3729
#define NOTE_B7  3951
#define NOTE_C8  4186
#define NOTE_CS8 4435
#define NOTE_D8  4699
#define NOTE_DS8 4978

// Jingle Bells melody
int melody[] = {
  NOTE_E5, NOTE_E5, NOTE_E5,0, // "Jingle bells"
  NOTE_E5, NOTE_E5, NOTE_E5,0, // "Jingle bells"
  NOTE_E5, NOTE_G5, NOTE_C5, NOTE_D5, NOTE_E5,0,0,0, // "Jingle all the way"
  NOTE_F5, NOTE_F5, NOTE_F5, NOTE_F5,0,0, // "Oh what fun it"
  NOTE_F5, NOTE_E5, NOTE_E5, NOTE_E5,NOTE_E5,0,0, // "is to ride"
  NOTE_E5, NOTE_D5, NOTE_D5, NOTE_E5, NOTE_D5, NOTE_G5,0,0,0, // "in a one-horse open sleigh"
};

// Note durations for the melody
int noteDurations[] = {
  4, 4, 4, 8, // "Jingle bells"
  4, 4, 4, 8,  // "Jingle bells"
  4, 4, 4, 4, 4,8,8,8, // "Jingle all the way"
  4, 4, 4, 4,8,8, // "Oh what fun it"
  4, 4, 4, 4, 4,8,8, // "is to ride"
  4, 4, 4, 4, 4,8,8,8, // "in a one-horse open sleigh"
};

void setup() {
  pinMode(BUZZER_PIN, OUTPUT);
}

void loop() {
  pattern1(3);
  pattern2(2);
  pattern3(2);
  playMelody();
  pattern4(2);
  pattern5(3);
  pattern6(3);
  playMelody();
  wavePattern(3);
  //breathingEffect(3);
  //chasePattern(3);
  //heartbeatPattern(3);
  //randomBlinkPattern(3);
  //strobeEffect(3);
  centerOutPattern(4);
  randomAllBlink(4);
  flashingPattern(4);
  playMelody();
  
}

// LED Patterns
void pattern1(int a) {
  for (int x = 0; x < a; x++) {
    led.setAllHigh();
    delay(300);
    led.setAllLow();
    delay(300);
  }
}

void pattern2(int a) {
  for (int x = 0; x < a; x++) {
    for (int a = 0; a < 16; a++) {
      led.set(a, HIGH);
      delay(80);
      led.set(a, LOW);
    }
    for (int b = 15; b > 0; b--) {
      led.set(b, HIGH);
      delay(80);
      led.set(b, LOW);
    }
  }
}

void pattern3(int a) {
  for (int x = 0; x < a; x++) {
    for (int a = 0; a < 16; a++) {
      led.set(a, HIGH);
      delay(80);
    }
    for (int b = 15; b > 0; b--) {
      led.set(b, LOW);
      delay(80);
    }
  }
}

void pattern4(int a) {
  for (int x = 0; x < a; x++) {
    for (int a = 0; a < 16; a++) {
      led.set(a, LOW);
      delay(80);
      led.set(a, HIGH);
    }
    for (int b = 15; b > 0; b--) {
      led.set(b, LOW);
      delay(80);
      led.set(b, HIGH);
    }
  }
}

void pattern5(int a) {
  for (int x = 0; x < a; x++) {
    for (int a = 0; a < 16; a++) {
      led.set(a, HIGH);
      delay(80);
      led.set(a, LOW);
    }
  }
}

void pattern6(int a) {
  for (int x = 0; x < a; x++) {
    for (int a = 0; a < 16; a++) {
      led.set(a, HIGH);
      led.set(a + 2, HIGH);
      delay(80);
      led.set(a, LOW);
      led.set(a + 2, LOW);
    }
  }
}

void wavePattern(int a) {
  for (int x = 0; x < a; x++) {
    for (int i = 0; i < 16; i++) {
      led.set(i, HIGH);
      delay(50);
      led.set(i, LOW);
    }
    for (int i = 15; i >= 0; i--) {
      led.set(i, HIGH);
      delay(50);
      led.set(i, LOW);
    }
  }
}

void breathingEffect(int a) {
  for (int x = 0; x < a; x++) {
    for (int brightness = 0; brightness < 255; brightness++) {
      for (int i = 0; i < 16; i++) {
        led.set(i, brightness);
      }
      delay(10); // Adjust delay to control breathing speed
    }
    for (int brightness = 255; brightness > 0; brightness--) {
      for (int i = 0; i < 16; i++) {
        led.set(i, brightness);
      }
      delay(10); // Adjust delay to control breathing speed
    }
  }
}

void chasePattern(int a) {
  for (int x = 0; x < a; x++) {
    for (int i = 0; i < 16; i++) {
      led.set(i, HIGH);
      delay(100); // Delay for speed adjustment
      led.set(i, LOW);
    }
  }
}

void heartbeatPattern(int a) {
  for (int x = 0; x < a; x++) {
    for (int brightness = 0; brightness < 255; brightness++) {
      for (int i = 0; i < 16; i++) {
        led.set(i, brightness);
      }
      delay(5); // Speed of pulse up
    }
    for (int brightness = 255; brightness > 0; brightness--) {
      for (int i = 0; i < 16; i++) {
        led.set(i, brightness);
      }
      delay(5); // Speed of pulse down
    }
  }
}

void randomBlinkPattern(int a) {
  for (int x = 0; x < a; x++) {
    int randLed = random(0, 16); // Pick a random LED from 0 to 15
    led.set(randLed, HIGH);
    delay(random(50, 200)); // Random delay for blink speed
    led.set(randLed, LOW);
    delay(random(50, 200)); // Random delay for blink speed
  }
}

void strobeEffect(int a) {
  for (int x = 0; x < a; x++) {
    led.setAllHigh();
    delay(100); // Strobe on time
    led.setAllLow();
    delay(100); // Strobe off time
  }
}

void centerOutPattern(int a) {
  for (int x = 0; x < a; x++) {
    for (int i = 7; i >= 0; i--) {
      led.set(i, HIGH);
      led.set(15 - i, HIGH);
      delay(100);
      led.set(i, LOW);
      led.set(15 - i, LOW);
    }
  }
}

void randomAllBlink(int a) {
  for (int x = 0; x < a; x++) {
    for (int i = 0; i < 16; i++) {
      if (random(0, 2) == 0) {
        led.set(i, HIGH);
      } else {
        led.set(i, LOW);
      }
    }
    delay(200);
  }
}

void flashingPattern(int a) {
  for (int x = 0; x < a; x++) {
    led.setAllHigh();
    delay(100);
    led.setAllLow();
    delay(100);
  }
}



// Play the melody
void playMelody() {
  for (int i = 0; i < sizeof(melody) / sizeof(melody[0]); i++) {
    int noteFrequency = melody[i];
    int noteDuration = 1000 / noteDurations[i]; // Note duration in ms
    playTone(noteFrequency, noteDuration);
    delay(noteDuration * 0.1); // Pause between notes
  }
}

// Generate tones for the melody
void playTone(int frequency, int duration) {
  long period = 1000000 / frequency; // Period in microseconds
  long halfPeriod = period / 2;     // Half the period
  long cycles = (long)frequency * duration / 1000; // Total cycles for the duration

  for (long i = 0; i < cycles; i++) {
    digitalWrite(BUZZER_PIN, HIGH);
    delayMicroseconds(halfPeriod);
    digitalWrite(BUZZER_PIN, LOW);
    delayMicroseconds(halfPeriod);
  }
}
  • Now, select the board and port, then click the upload button.

Step 8

Next, remove the Arduino board from the Christmas tree and create a base for it. I used a piece of rigifoam for this, but you can use any other material you prefer.

Step 9

Finally, power up the Christmas tree. I used an Arduino UNO board for this. Enjoy the project! The full video guide is below. We hope to see you in the next project. Have a great day!

Troubleshooting Tips

  • Check the soldering connections.
  • Check the Arduino uno board connections.
  • Verify the ATtiny85 Setup.
  • Check the program.
  • Select the correct board and port.
  • Check the power source.

DIY Christmas Tree with Lights and Music | Simple Christmas Tree idea

https://youtu.be/-iFfbw8hqow

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