Electronic Light Sensor Piano

This is a project that allows you to play piano by covering light sensors

Step 1: Parts

1. Arduino Uno

2. Breadboard

3. Male wires

4. Light sensor

5. Resistor

6. Speaker

Step 2: Set Up

1. Place 5 light sensors in breadboard

2. Connect each light sensor to different pins using male wires

3. Connect each light sensor to Ground, with a resistor to limit the amount of energy that flows

4. Connect each resistor to 5v

5. Connect a speaker to ground and pin using male wires

6. Play the piano by covering each light sensor at different times

Step 3: Code Part 1: Define Gives Each Note a Tone

//#include "pitches.h"

#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

Step 4: Code Part 2: Assign Pinmodes and Establish Integers

int melody[] = {

NOTE_C4, NOTE_G3, NOTE_G3, NOTE_A3, NOTE_G3, 0, NOTE_B3, NOTE_C4

};

// note durations: 4 = quarter note, 8 = eighth note, etc.: int noteDurations[] = {

4, 8, 8, 4, 4, 4, 4, 4

};

void setup() {

// put your setup code here, to run once:

pinMode(A1, INPUT);

pinMode(A2, INPUT);

pinMode(A3, INPUT);

pinMode(A4, INPUT);

pinMode(A5, INPUT);

pinMode(8, OUTPUT);

Serial.begin(9600);

/*for (int thisNote = 0; thisNote < 8; thisNote++) {

// to calculate the note duration, take one second divided by the note type.

//e.g. quarter note = 1000 / 4, eighth note = 1000/8, etc.

int noteDuration = 1000 / noteDurations[thisNote];

tone(8, melody[thisNote], noteDuration);

// to distinguish the notes, set a minimum time between them.

// the note's duration + 30% seems to work well:

int pauseBetweenNotes = noteDuration * 1.30;

delay(pauseBetweenNotes);

// stop the tone playing:

noTone(8);

}*/

Step 5: Code Part 3: If the Light Sensor Is Covered, Then Play a Tone

}

void loop()

{

// put your main code here, to run repeatedly:

int ldr1 = analogRead(A1);

int ldr2 = analogRead(A2);

int ldr3 = analogRead(A3);

int ldr4 = analogRead(A4);

int ldr5 = analogRead(A5);

//Serial.println(ldr5);

if (ldr1 > 500)

{tone(8, NOTE_A3);}

else noTone(8);

if (ldr2 > 300)

{tone(8, NOTE_C4);}

else noTone(8);

if (ldr3 > 210)

{tone(8, NOTE_D4);}

else noTone(8);

if (ldr4 > 400)

{tone(8, NOTE_E4);}

else noTone(8);

if (ldr5 > 310)

{tone(8, NOTE_C4);}

else noTone(8); }