Christmas LED Tree Decoration

Wooden Christmas tree decoration, with led rows representing string lights of a Christmas tree and a star on top of it.

Dec 30, 2019

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10318 views

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3 respects

Components and supplies

Through Hole Resistor, 33 kohm

Resistor 220 ohm

Resistor 475 ohm

Through Hole Resistor, 680 ohm

Through Hole Resistor, 20 kohm

Resistor 330 ohm

Arduino Nano R3

5 mm LED: Green

5 mm LED: Yellow

SparkFun Solder-able Breadboard

5 mm LED: Red

Resistor 100 ohm

General Purpose Transistor NPN

Tools and machines

Soldering iron (generic)

Drill / Driver, Cordless

Hot glue gun (generic)

Apps and platforms

Arduino IDE

Project description

Code

Simple lightshow

c_cpp

1// LED PINS (n € N)
2//  green: 2n+1, n<5
3//  red: 2n+2, n<5
4//  yellow: n+11, n<3
5
6#define SHORT unsigned short
7
8void setup() {
9  
10  for(SHORT pin=1; pin<14; pin++) 
11    pinMode(pin, OUTPUT);
12}
13
14void  clearLeds() {
15    
16  for(SHORT pin=1; pin<14; pin++)
17    digitalWrite(pin,  LOW);
18}
19
20void firstProgramme() {
21  
22  for(SHORT pin=1; pin<14; pin++)
23    digitalWrite(pin, HIGH);
24
25  delay(3000);
26
27  clearLeds();
28}
29
30void  secondProgramme() {
31
32  delay(700);
33
34  for(SHORT n=0; n<5; n++) {
35    
36    digitalWrite(2*n+1, HIGH);
37    digitalWrite(2*n+2, HIGH);
38    
39    delay(700);
40  }
41
42  for(SHORT pin=11; pin<14; pin++)
43    digitalWrite(pin,  HIGH);
44
45  delay(700);
46
47  for(SHORT i=0; i<6; i++)
48    for(SHORT n=13;  n>10; n--) {
49      
50      for(SHORT pin=11; pin<14; pin++)
51         digitalWrite(pin,  pin == n);
52
53      delay(100);
54    }
55
56 digitalWrite(11, LOW);
57
58  for(SHORT pin=13; pin>10; pin--) {
59    digitalWrite(pin, HIGH);
60    delay(100);
61  }
62
63  clearLeds();
64}
65
66void thirdProgramme() {
67
68  SHORT counter  = 0;
69  
70  for(SHORT pin=11; pin<14; pin++)
71    digitalWrite(pin, HIGH);
72
73  while(counter<31) {
74    
75    for(SHORT pin=1; pin<11; pin++)
76      digitalWrite(pin,  (pin + counter)%2);
77
78    delay(300);
79    counter++;
80  }
81
82  clearLeds();
83}
84
85void  loop() {
86
87  firstProgramme();
88  secondProgramme();
89  thirdProgramme();
90   
91}

// LED PINS (n € N)
//  green: 2n+1, n<5
//  red: 2n+2, n<5
//  yellow: n+11, n<3

#define SHORT unsigned short

void setup() {
  
  for(SHORT pin=1; pin<14; pin++) 
    pinMode(pin, OUTPUT);
}

void  clearLeds() {
    
  for(SHORT pin=1; pin<14; pin++)
    digitalWrite(pin,  LOW);
}

void firstProgramme() {
  
  for(SHORT pin=1; pin<14; pin++)
    digitalWrite(pin, HIGH);

  delay(3000);

  clearLeds();
}

void  secondProgramme() {

  delay(700);

  for(SHORT n=0; n<5; n++) {
    
    digitalWrite(2*n+1, HIGH);
    digitalWrite(2*n+2, HIGH);
    
    delay(700);
  }

  for(SHORT pin=11; pin<14; pin++)
    digitalWrite(pin,  HIGH);

  delay(700);

  for(SHORT i=0; i<6; i++)
    for(SHORT n=13;  n>10; n--) {
      
      for(SHORT pin=11; pin<14; pin++)
         digitalWrite(pin,  pin == n);

      delay(100);
    }

 digitalWrite(11, LOW);

  for(SHORT pin=13; pin>10; pin--) {
    digitalWrite(pin, HIGH);
    delay(100);
  }

  clearLeds();
}

void thirdProgramme() {

  SHORT counter  = 0;
  
  for(SHORT pin=11; pin<14; pin++)
    digitalWrite(pin, HIGH);

  while(counter<31) {
    
    for(SHORT pin=1; pin<11; pin++)
      digitalWrite(pin,  (pin + counter)%2);

    delay(300);
    counter++;
  }

  clearLeds();
}

void  loop() {

  firstProgramme();
  secondProgramme();
  thirdProgramme();
   
}

Simple lightshow

c_cpp

1// LED PINS (n € N)
2//  green: 2n+1, n<5
3//  red: 2n+2, n<5
4//   yellow: n+11, n<3
5
6#define SHORT unsigned short
7
8void setup() {
9   
10  for(SHORT pin=1; pin<14; pin++) 
11    pinMode(pin, OUTPUT);
12}
13
14void   clearLeds() {
15    
16  for(SHORT pin=1; pin<14; pin++)
17    digitalWrite(pin,   LOW);
18}
19
20void firstProgramme() {
21  
22  for(SHORT pin=1; pin<14; pin++)
23     digitalWrite(pin, HIGH);
24
25  delay(3000);
26
27  clearLeds();
28}
29
30void   secondProgramme() {
31
32  delay(700);
33
34  for(SHORT n=0; n<5; n++) {
35     
36    digitalWrite(2*n+1, HIGH);
37    digitalWrite(2*n+2, HIGH);
38    
39     delay(700);
40  }
41
42  for(SHORT pin=11; pin<14; pin++)
43    digitalWrite(pin,   HIGH);
44
45  delay(700);
46
47  for(SHORT i=0; i<6; i++)
48    for(SHORT n=13;   n>10; n--) {
49      
50      for(SHORT pin=11; pin<14; pin++)
51         digitalWrite(pin,   pin == n);
52
53      delay(100);
54    }
55
56 digitalWrite(11, LOW);
57
58   for(SHORT pin=13; pin>10; pin--) {
59    digitalWrite(pin, HIGH);
60    delay(100);
61   }
62
63  clearLeds();
64}
65
66void thirdProgramme() {
67
68  SHORT counter   = 0;
69  
70  for(SHORT pin=11; pin<14; pin++)
71    digitalWrite(pin, HIGH);
72
73   while(counter<31) {
74    
75    for(SHORT pin=1; pin<11; pin++)
76      digitalWrite(pin,   (pin + counter)%2);
77
78    delay(300);
79    counter++;
80  }
81
82  clearLeds();
83}
84
85void   loop() {
86
87  firstProgramme();
88  secondProgramme();
89  thirdProgramme();
90    
91}

// LED PINS (n € N)
//  green: 2n+1, n<5
//  red: 2n+2, n<5
//   yellow: n+11, n<3

#define SHORT unsigned short

void setup() {
   
  for(SHORT pin=1; pin<14; pin++) 
    pinMode(pin, OUTPUT);
}

void   clearLeds() {
    
  for(SHORT pin=1; pin<14; pin++)
    digitalWrite(pin,   LOW);
}

void firstProgramme() {
  
  for(SHORT pin=1; pin<14; pin++)
     digitalWrite(pin, HIGH);

  delay(3000);

  clearLeds();
}

void   secondProgramme() {

  delay(700);

  for(SHORT n=0; n<5; n++) {
     
    digitalWrite(2*n+1, HIGH);
    digitalWrite(2*n+2, HIGH);
    
     delay(700);
  }

  for(SHORT pin=11; pin<14; pin++)
    digitalWrite(pin,   HIGH);

  delay(700);

  for(SHORT i=0; i<6; i++)
    for(SHORT n=13;   n>10; n--) {
      
      for(SHORT pin=11; pin<14; pin++)
         digitalWrite(pin,   pin == n);

      delay(100);
    }

 digitalWrite(11, LOW);

   for(SHORT pin=13; pin>10; pin--) {
    digitalWrite(pin, HIGH);
    delay(100);
   }

  clearLeds();
}

void thirdProgramme() {

  SHORT counter   = 0;
  
  for(SHORT pin=11; pin<14; pin++)
    digitalWrite(pin, HIGH);

   while(counter<31) {
    
    for(SHORT pin=1; pin<11; pin++)
      digitalWrite(pin,   (pin + counter)%2);

    delay(300);
    counter++;
  }

  clearLeds();
}

void   loop() {

  firstProgramme();
  secondProgramme();
  thirdProgramme();
    
}

Downloadable files

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Simplified prefboard design

SIngle color series-parallel circuit

SIngle color series circuit

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henyte

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