Arduino Song Player Using 555 and Decade Counter

Here we will be using a decade counter along with a 555 timer to accordingly light LEDS to the beat of the song Happy Birthday. It is a fun project that allows to grasp a full understanding of how these components work

*Arduino

*Jumper Wires

*LCD Display

*Potentiometer

*555 timer

*4017 Johnson Decade Counter

*Capacitor

*10 LEDS

*Polarized Capacitor

* 13 1K resistors

*Buzzer

Here is a schematic that can be followed to build this circuit; or you could always refer to the tinkercad circuit.

1. 555 Timer

The 555 timer will produce pulses that will act as a clock to the decade counter. Here are what each of the pins should be connected to.

GND = Ground Rail

Power = Power Rail

Trigger = Threshold pin (on 555 timer)

Trigger = Also connected to Wiper pin on potentiometer

Out = Power Rail

Reset = Power Rail

Control Voltage = Capacitor pin 1

Discharge = Power Rail

Discharge = Terminal 2 in potentiometer

2. Decade Counter

pin 3 goes to the 1st resistor

pin 2 goes to the 2 nd resistor

pin 4 goes to the 3 rd resisitor

pin 7 goes to the 4 th resistor

pin 10 goes to the 5 th resisitor

pin 1 goes to the 6 th resistor

pin 5 goes ot the 7 th resistor

pin 6 goes to the 8 th resistor

pin 9 goes to the 9 th resisitor

pin 11 goes to the 10 th resistor

3. LEDS

Connect the + leg of the LED to the resistor and the negative leg to GND

4. Buzzer

connect the + side to an Arduino pin (I did pin 6) and the negative side to GND rail

5. LCD Display

Here are which each of the pins should be connected to for the LCD Display

pin 1 = GND

pin 2 = Power

pin 3 = GND

pin 4 = 12

pin 5 = GND

pin 6 = 11

pin 11 = 5

pin 12 = 4

pin 13 = 3

pin 14 = 2

pin 15 = Power

pin 16 = GND

6. Potentiometer, Capacitor, Polarized capacitor

Capacitor - Terminal 1 = Control Voltage in 555 timer

Terminal 2 = GND

Potentiometer -

Terminal 1 = Connected to terminal 2 (within the potentiometer)

Wiper = Positive side of Polarized capacitor

Terminal 2 = Discharge pin (555 timer)

Polarized Capacitor -

Negative Side = GND

Positive Side = Wiper (in potentiometer)

Here is the code. I decided to use a simple song for my code; happy birthday, but any song can be used (but the code will need to be altered accordingly).

The code is quite straight forward. Basically what is happening is that the notes for the Happy Birthday song are played through the buzzer while the LEDs are lighting up accordingly with "Happy Birthday" displaying on the LCD Display.

#include
LiquidCrystal lcd(12,11,5,4,3,2);

int speakerPin = 6;

int length = 28; // the number of notes

char notes[] = "GGAGcB GGAGdc GGxecBA yyecdc";

int beats[] = { 2, 2, 8, 8, 8, 16, 1, 2, 2, 8, 8,8, 16, 1, 2,2,8,8,8,8,16, 1,2,2,8,8,8,16 };

int tempo = 150;

void playTone(int tone, int duration) {

for (long i = 0; i < duration * 1000L; i += tone * 2) {

digitalWrite(speakerPin, HIGH);

delayMicroseconds(tone);

digitalWrite(speakerPin, LOW);

delayMicroseconds(tone);

}

}

void playNote(char note, int duration) {

char names[] = {'C', 'D', 'E', 'F', 'G', 'A', 'B',

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

'x', 'y' };

int tones[] = { 1915, 1700, 1519, 1432, 1275, 1136, 1014,

956, 834, 765, 593, 468, 346, 224,

655 , 715 };

int SPEE = 5;

// play the tone corresponding to the note name

for (int i = 0; i < 17; i++) {

if (names[i] == note) { int newduration = duration/SPEE; playTone(tones[i], newduration);

}

}

}

void setup() {

pinMode(speakerPin, OUTPUT); lcd.begin(16,2);

}

void loop() { lcd.clear(); lcd.setCursor(0,0); for (int i = 0; i < length; i++) {

if (notes[i] == ' ') {

delay(beats[i] * tempo); // rest

} else {

playNote(notes[i], beats[i] * tempo);

}

// pause between notes

delay(tempo); lcd.print ("Happy Birthday!!"); lcd.setCursor(2,1); lcd.print(""); }

}