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Arduino Christmas Light Sequencer

I’ve always enjoyed watching those Youtube videos where someone has sequenced all their Christmas lights to music. Some are very elaborate. I wonder, what could I do with a Arduino and a SainSmart 8 relay board? I found a project on Instructables where a guy built his own relay board. Since I already have one from SainSmart, that eliminated half the complexity of the project right there. He already had the relay timing worked out, so I needed to figure out what notes to play, and put those notes into his sketch so that they played in sequence with the lights. I pulled up some sheet music only, and started a spread sheet, where each note is an event. I broke down the song into it’s 57 notes, listed the word parts that go with each note, figured out the frequency of each note, and inserted the appropriate Tone / noTone pairs in the code.

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Video posted below the code.

Arduino 2560 (you can use a UNO just as easily)
JBTech 8 Channel Relay (16 channel available)
Piezo Module
Christmas Tree Light Strings (up to 8, or 16, can link up to 3 end to end)
After Christmas sales on light strings are awesome!

Note to Frequency List
Joy to the World sheet music
Virtual Piano

Connections:

on Relay board:
Gnd to Arduino Gnd
VCC to; Arduino +5
IN1-8 to Arduino 12-5

Piezo:
– to Arduino Gnd
S to Arduino 4 (I’m using a Mega 2560)

Christmas Light Strings:

Cut one wire that goes from the plug to the first light in the string. Loop it through one of the relays on the board, using the Normally Open and Common contact in series with that cut wire. See our previous relay post for details.

Code:

int tree1 = 5;
int tree2 = 6;
int tree3 = 7;
int tree4 = 8;
int tree5 = 9;
int tree6 = 10;
int tree7 = 11;
int tree8 = 12;
int s = 150;
int ds = 225;
int e = 300;
int de = 450;
int q = 600;
int dq = 900;
int h = 1200;
int dh = 1800;

int pPin = 4;

void setup()
{
pinMode(tree1, OUTPUT);
pinMode(tree2, OUTPUT);
pinMode(tree3, OUTPUT);
pinMode(tree4, OUTPUT);
pinMode(tree5, OUTPUT);
pinMode(tree6, OUTPUT);
pinMode(tree7, OUTPUT);
pinMode(tree8, OUTPUT);
digitalWrite(tree1,LOW);
delay(1000);
digitalWrite(tree2,LOW);
delay(1000);
digitalWrite(tree3,LOW);
delay(1000);
digitalWrite(tree4,LOW);
delay(1000);
digitalWrite(tree5,LOW);
delay(1000);
digitalWrite(tree6,LOW);
delay(1000);
digitalWrite(tree7,LOW);
delay(1000);
digitalWrite(tree8,LOW);
delay(1000);
digitalWrite(tree1,HIGH);
digitalWrite(tree2,HIGH);
digitalWrite(tree3,HIGH);
digitalWrite(tree4,HIGH);
digitalWrite(tree5,HIGH);
digitalWrite(tree6,HIGH);
digitalWrite(tree7,HIGH);
digitalWrite(tree8,HIGH);

}

void loop()
{

// event 1
noTone(pPin);
digitalWrite(tree1, LOW);
digitalWrite(tree8, LOW);
tone(pPin, 261.63); // c4
delay(q);
noTone(pPin);
digitalWrite(tree1, HIGH);
digitalWrite(tree8, HIGH);
// event 2
digitalWrite(tree2, LOW);
digitalWrite(tree7, LOW);
tone(pPin, 246.94);  // b3
delay(de);
noTone(pPin);
digitalWrite(tree2, HIGH);
digitalWrite(tree7, HIGH);
// event 3
digitalWrite(tree3, LOW);
digitalWrite(tree6, LOW);
tone(pPin, 220); // a3
delay(s);
noTone(pPin);
digitalWrite(tree3, HIGH);
digitalWrite(tree6, HIGH);
// event 4
digitalWrite(tree4, LOW);
digitalWrite(tree5, LOW);
tone(pPin, 196); // g3
delay(1050);
noTone(pPin);
digitalWrite(tree4, HIGH);
digitalWrite(tree5, HIGH);
// event 5
digitalWrite(tree1, LOW);
digitalWrite(tree8, LOW);
tone(pPin, 174.61); //f3
delay(s);
noTone(pPin);
digitalWrite(tree1, HIGH);
digitalWrite(tree8, HIGH);
// event 6
digitalWrite(tree2, LOW);
digitalWrite(tree7, LOW);
tone(pPin, 164.81); //e3
delay(q);
noTone(pPin);
digitalWrite(tree2, HIGH);
digitalWrite(tree7, HIGH);
// event 7
digitalWrite(tree3, LOW);
digitalWrite(tree6, LOW);
tone(pPin, 146.83); // d3
delay(q);
noTone(pPin);
digitalWrite(tree3, HIGH);
digitalWrite(tree6, HIGH);
// event 8
digitalWrite(tree4, LOW);
digitalWrite(tree5, LOW);
tone(pPin, 130.81); //c3
delay(dq);
noTone(pPin);
digitalWrite(tree4, HIGH);
digitalWrite(tree5, HIGH);
// event 9
digitalWrite(tree1, LOW);
digitalWrite(tree2, LOW);
digitalWrite(tree7, LOW);
digitalWrite(tree8, LOW);
tone(pPin, 196); // g3
delay(e);
noTone(pPin);
digitalWrite(tree1, HIGH);
digitalWrite(tree2, HIGH);
digitalWrite(tree7, HIGH);
digitalWrite(tree8, HIGH);
// event 10
digitalWrite(tree2, LOW);
digitalWrite(tree3, LOW);
digitalWrite(tree6, LOW);
digitalWrite(tree7, LOW);
tone(pPin, 220); // a3
delay(dq);
noTone(pPin);
digitalWrite(tree2, HIGH);
digitalWrite(tree3, HIGH);
digitalWrite(tree6, HIGH);
digitalWrite(tree7, HIGH);
// event 11
digitalWrite(tree1, LOW);
digitalWrite(tree2, LOW);
digitalWrite(tree7, LOW);
digitalWrite(tree8, LOW);
tone(pPin, 220);  // a3
delay(e);
noTone(pPin);
digitalWrite(tree1, HIGH);
digitalWrite(tree2, HIGH);
digitalWrite(tree7, HIGH);
digitalWrite(tree8, HIGH);
// event 12
digitalWrite(tree3, LOW);
digitalWrite(tree4, LOW);
digitalWrite(tree5, LOW);
digitalWrite(tree6, LOW);
tone(pPin, 246.94); //b3
delay(dq);
noTone(pPin);
digitalWrite(tree3, HIGH);
digitalWrite(tree4, HIGH);
digitalWrite(tree5, HIGH);
digitalWrite(tree6, HIGH);
// event 13
digitalWrite(tree1, LOW);
digitalWrite(tree2, LOW);
digitalWrite(tree7, LOW);
digitalWrite(tree8, LOW);
tone(pPin, 246.94);  //b3
delay(e);
noTone(pPin);
digitalWrite(tree1, HIGH);
digitalWrite(tree2, HIGH);
digitalWrite(tree7, HIGH);
digitalWrite(tree8, HIGH);
// event 14
digitalWrite(tree1, LOW);
digitalWrite(tree2, LOW);
digitalWrite(tree3, LOW);
digitalWrite(tree4, LOW);
digitalWrite(tree5, LOW);
digitalWrite(tree6, LOW);
digitalWrite(tree7, LOW);
digitalWrite(tree8, LOW);
tone(pPin, 261.63); //c4
delay(dq);
noTone(pPin);
digitalWrite(tree1, HIGH);
digitalWrite(tree2, HIGH);
digitalWrite(tree3, HIGH);
digitalWrite(tree4, HIGH);
digitalWrite(tree5, HIGH);
digitalWrite(tree6, HIGH);
digitalWrite(tree7, HIGH);
digitalWrite(tree8, HIGH);
// event 15
digitalWrite(tree8, LOW);
tone(pPin, 261.63); //c4
delay(e);
noTone(pPin);
digitalWrite(tree8, HIGH);
// event 16
digitalWrite(tree1, LOW);
tone(pPin, 261.63); //c4
delay(e);
noTone(pPin);
digitalWrite(tree1, HIGH);
// event 17
digitalWrite(tree7, LOW);
tone(pPin, 246.94); //b3
delay(e);
noTone(pPin);
digitalWrite(tree7, HIGH);
// event 18
digitalWrite(tree2, LOW);
tone(pPin, 220); //a3
delay(e);
noTone(pPin);
digitalWrite(tree2, HIGH);
// event 19
digitalWrite(tree6, LOW);
tone(pPin, 196); //g3
delay(e);
noTone(pPin);
digitalWrite(tree6, HIGH);
// event 20
digitalWrite(tree3, LOW);
tone(pPin, 196); //g3
delay(de);
noTone(pPin);
digitalWrite(tree3, HIGH);
// event 21
digitalWrite(tree5, LOW);
tone(pPin, 174.61); //f3
delay(s);
noTone(pPin);
digitalWrite(tree5, HIGH);
// event 22
digitalWrite(tree4, LOW);
tone(pPin, 164.81); //e3
delay(e);
noTone(pPin);
digitalWrite(tree4, HIGH);
// event 23
digitalWrite(tree8, LOW);
tone(pPin, 261.63); //c4
delay(e);
noTone(pPin);
digitalWrite(tree8, HIGH);
// event 24
digitalWrite(tree1, LOW);
tone(pPin, 261.63); //c4
delay(e);
noTone(pPin);
digitalWrite(tree1, HIGH);
// event 25
digitalWrite(tree7, LOW);
tone(pPin, 246.94); //b3
delay(e);
noTone(pPin);
digitalWrite(tree7, HIGH);
// event 26
digitalWrite(tree2, LOW);
tone(pPin, 220); //a3
delay(e);
noTone(pPin);
digitalWrite(tree2, HIGH);
// event 27
digitalWrite(tree6, LOW);
tone(pPin, 196); //g3
delay(e);
noTone(pPin);
digitalWrite(tree6, HIGH);
// event 27
digitalWrite(tree3, LOW);
tone(pPin, 196); //g3
delay(de);
noTone(pPin);
digitalWrite(tree3, HIGH);
// event 29
digitalWrite(tree5, LOW);
tone(pPin, 174.61); //f3
delay(s);
noTone(pPin);
digitalWrite(tree5, HIGH);
// event 30
digitalWrite(tree4, LOW);
tone(pPin, 164.81); //e3
delay(e);
noTone(pPin);
digitalWrite(tree4, HIGH);
// event 31
digitalWrite(tree2, LOW);
digitalWrite(tree7, LOW);
tone(pPin, 164.81); //e3
delay(e);
noTone(pPin);
digitalWrite(tree2, HIGH);
digitalWrite(tree7, HIGH);
// event 32
digitalWrite(tree1, LOW);
digitalWrite(tree8, LOW);
tone(pPin, 164.81); //e3
delay(e);
noTone(pPin);
digitalWrite(tree1, HIGH);
digitalWrite(tree8, HIGH);
// event 33
digitalWrite(tree2, LOW);
digitalWrite(tree7, LOW);
tone(pPin, 164.81); //e3
delay(e);
noTone(pPin);
digitalWrite(tree2, HIGH);
digitalWrite(tree7, HIGH);
// event 34
digitalWrite(tree1, LOW);
digitalWrite(tree8, LOW);
tone(pPin, 164.81); //e3
delay(e);
noTone(pPin);
digitalWrite(tree1, HIGH);
digitalWrite(tree8, HIGH);
// event 35
digitalWrite(tree2, LOW);
digitalWrite(tree7, LOW);
tone(pPin, 164.81); //e3
delay(75);
noTone(pPin);
digitalWrite(tree2, HIGH);
digitalWrite(tree7, HIGH);
// event 36
digitalWrite(tree3, LOW);
digitalWrite(tree6, LOW);
tone(pPin, 174.61); //f3
delay(75);
noTone(pPin);
digitalWrite(tree3, HIGH);
digitalWrite(tree6, HIGH);
// event 37
digitalWrite(tree4, LOW);
digitalWrite(tree5, LOW);
tone(pPin, 196); //g3
delay(dq);
noTone(pPin);
digitalWrite(tree4, HIGH);
digitalWrite(tree5, HIGH);
// event 38
digitalWrite(tree4, LOW);
digitalWrite(tree5, LOW);
tone(pPin, 174.61); //f3
delay(75);
noTone(pPin);
digitalWrite(tree4, HIGH);
digitalWrite(tree5, HIGH);
// event 39
digitalWrite(tree3, LOW);
digitalWrite(tree6, LOW);
tone(pPin, 164.81); //e3
delay(75);
noTone(pPin);
digitalWrite(tree3, HIGH);
digitalWrite(tree6, HIGH);
// event 40
digitalWrite(tree4, LOW);
digitalWrite(tree5, LOW);
tone(pPin, 146.83); //d3
delay(e);
noTone(pPin);
digitalWrite(tree4, HIGH);
digitalWrite(tree5, HIGH);
// event 41
digitalWrite(tree3, LOW);
digitalWrite(tree6, LOW);
tone(pPin, 146.83); //d3
delay(e);
noTone(pPin);
digitalWrite(tree3, HIGH);
digitalWrite(tree6, HIGH);
// event 42
digitalWrite(tree4, LOW);
digitalWrite(tree5, LOW);
tone(pPin, 146.83); //d3
delay(e);
noTone(pPin);
digitalWrite(tree4, HIGH);
digitalWrite(tree5, HIGH);
// event 43
digitalWrite(tree3, LOW);
digitalWrite(tree6, LOW);
tone(pPin, 146.83); //d3
delay(75);
noTone(pPin);
digitalWrite(tree3, HIGH);
digitalWrite(tree6, HIGH);
// event 44
digitalWrite(tree2, LOW);
digitalWrite(tree7, LOW);
tone(pPin, 164.81); //e3
delay(75);
noTone(pPin);
digitalWrite(tree2, HIGH);
digitalWrite(tree7, HIGH);
// event 45
digitalWrite(tree1, LOW);
digitalWrite(tree8, LOW);
tone(pPin, 174.61); //f3
delay(dq);
noTone(pPin);
digitalWrite(tree1, HIGH);
digitalWrite(tree8, HIGH);
// event 46
digitalWrite(tree1, LOW);
digitalWrite(tree2, LOW);
digitalWrite(tree7, LOW);
digitalWrite(tree8, LOW);
tone(pPin, 164.81); //e3
delay(75);
noTone(pPin);
digitalWrite(tree1, HIGH);
digitalWrite(tree2, HIGH);
digitalWrite(tree7, HIGH);
digitalWrite(tree8, HIGH);
// event 47
digitalWrite(tree2, LOW);
digitalWrite(tree3, LOW);
digitalWrite(tree6, LOW);
digitalWrite(tree7, LOW);
tone(pPin, 146.83); //d3
delay(75);
noTone(pPin);
digitalWrite(tree2, HIGH);
digitalWrite(tree3, HIGH);
digitalWrite(tree6, HIGH);
digitalWrite(tree7, HIGH);
// event 48
digitalWrite(tree3, LOW);
digitalWrite(tree4, LOW);
digitalWrite(tree5, LOW);
digitalWrite(tree6, LOW);
tone(pPin, 130.81); //c3
delay(e);
noTone(pPin);
digitalWrite(tree3, HIGH);
digitalWrite(tree4, HIGH);
digitalWrite(tree5, HIGH);
digitalWrite(tree6, HIGH);
// event 49
digitalWrite(tree1, LOW);
digitalWrite(tree2, LOW);
digitalWrite(tree3, LOW);
digitalWrite(tree4, LOW);
digitalWrite(tree5, LOW);
digitalWrite(tree6, LOW);
digitalWrite(tree7, LOW);
digitalWrite(tree8, LOW);
tone(pPin, 261.63); //c4
delay(q);
noTone(pPin);
digitalWrite(tree1, HIGH);
digitalWrite(tree2, HIGH);
digitalWrite(tree3, HIGH);
digitalWrite(tree4, HIGH);
digitalWrite(tree5, HIGH);
digitalWrite(tree6, HIGH);
digitalWrite(tree7, HIGH);
digitalWrite(tree8, HIGH);
// event 50
digitalWrite(tree1, LOW);
digitalWrite(tree8, LOW);
tone(pPin, 220); //a3
delay(e);
noTone(pPin);
digitalWrite(tree1, HIGH);
digitalWrite(tree8, HIGH);
// event 51
digitalWrite(tree2, LOW);
digitalWrite(tree7, LOW);
tone(pPin, 196); //g3
delay(de);
noTone(pPin);
digitalWrite(tree2, HIGH);
digitalWrite(tree7, HIGH);
// event 52
digitalWrite(tree3, LOW);
digitalWrite(tree6, LOW);
tone(pPin, 174.61); //f3
delay(s);
noTone(pPin);
digitalWrite(tree3, HIGH);
digitalWrite(tree6, HIGH);
// event 53
digitalWrite(tree4, LOW);
digitalWrite(tree5, LOW);
tone(pPin, 164.81); //e3
delay(e);
noTone(pPin);
digitalWrite(tree4, HIGH);
digitalWrite(tree5, HIGH);
// event 54
digitalWrite(tree3, LOW);
digitalWrite(tree6, LOW);
tone(pPin, 174.61); //f3
delay(e);
noTone(pPin);
digitalWrite(tree3, HIGH);
digitalWrite(tree6, HIGH);
// event 55
digitalWrite(tree2, LOW);
digitalWrite(tree7, LOW);
tone(pPin, 164.81); //e3
delay(q);
noTone(pPin);
digitalWrite(tree2, HIGH);
digitalWrite(tree7, HIGH);
// event 56
digitalWrite(tree1, LOW);
digitalWrite(tree8, LOW);
tone(pPin, 146.83); //d3
delay(q);
noTone(pPin);
digitalWrite(tree1, HIGH);
digitalWrite(tree8, HIGH);
// event 57
digitalWrite(tree1, LOW);
digitalWrite(tree2, LOW);
digitalWrite(tree3, LOW);
digitalWrite(tree4, LOW);
digitalWrite(tree5, LOW);
digitalWrite(tree6, LOW);
digitalWrite(tree7, LOW);
digitalWrite(tree8, LOW);
tone(pPin, 130.81); //c3
delay(h);
noTone(pPin);
digitalWrite(tree1, HIGH);
digitalWrite(tree2, HIGH);
digitalWrite(tree3, HIGH);
digitalWrite(tree4, HIGH);
digitalWrite(tree5, HIGH);
digitalWrite(tree6, HIGH);
digitalWrite(tree7, HIGH);
digitalWrite(tree8, HIGH);
delay(10000);

}

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kurt
kurt
2 years ago

How do I use a 16 channel relay for this code ?

Arturo Laraya
4 years ago

excelent….gracias

Unknown
3 years ago

couldn't get it to work on the uno it would even verify

Steve Spence
3 years ago

check your code carefully.

DELNA DOMINI
3 years ago

Hey.. this is awesome..so u r telling that at the back of relay we can connect light strings and how we can change the song

Derrick W
3 years ago

Excellent – Thanks for sharing and Merry Christmas to you and all your Loved Ones!!!

Derrick W
3 years ago

The fact that your code passed the ARDUINO syntax check is already a huge testimony that you have done your homework – Thank you for your generosity of sharing your hard work with the rest of us nerds!!! Merry Christmas!!

Unknown
2 years ago

Can you give me some codes playing we wish a merry christmas with the help of 8 relay.

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