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利用arduino自制钢琴小键盘+播放内置曲子

字号+ 作者:PLC工程师 来源:未知 2016-04-17 15:56 我要评论( )

利用arduino自制钢琴小键盘+播放内置曲子

简介 :

这个小制作比较适合有一定基础的进行学习,其中涉及的知识比较全面,包括LCD1602,按键,电位计,蜂鸣器,LED等,利用7个按钮模拟出7个不同的声音,同时第八个按键可以选择播放预存的声音,简直就是一架小钢琴了,赶快开始吧:)
To begin, I should fill you in that I am completely new to the world of electronics.  
I have a decent background in coding, which helps, but I am always open to new ideas and suggestions for any of the projects I've created.  

Recently, I've been learning more about the Piezo Buzzer and the coding involved, and this is my creation based on what I've learned so far.  There is plenty of room for expansion with new features or switches, which I plan to do later, but for now it's on to the next challenge!

Below is a video of how the device works, including the menu of preset songs.  I will admit, technically song 4 and 5 are the same, but what can I say, I have the urge to create bigger and better things and writing the music code for more songs was not one of them!  The basic coding for both the main loops, and the individual song loops are pretty easy to adapt to your own ideas, so feel free to change however you see fit.
 

硬件组态 :



钢琴键盘:

The piano key switches were connected using a resistor ladder.  The resistors are placed in sequential order, connecting each switch to power.  For my project, I chose to use (in ohms) 1M, 10k, 4.7K, 1K, 560, and 220.  The first piano switch (on the left) is connected to power, and also to the next switch in the circuit.  The second switch is connected to the smallest resistor, and each switch after that connects to the next largest resistor in the series.  The last switch grounds the connection via a 10k ohm resistor and also connects all 7 switches to the "analog in" pin A0 on the Arduino.  The main sketch defines which music note frequencies are associated with each piano key.  For this project, I used C4, D4, E4, F4, G4, A4, & B4, with C4 being the leftmost switch.  Change the frequency values, or add additional switches to fully customize your own project!

LCD:

Connect the LCD pins according to the circuit diagram below.  Connect LCD pin 3 to the Potentiometer for contrast control of the screen.  The outside pins of the Potentiometer are connected to power and ground to complete this circuit.  LCD pin 15 is connected to power via a 220 ohm resistor.  If any of these pins change on your own project, update the code accordingly.

the menu switch...

Connect the menu switch to power, and ground it through a 10K ohm resistor.  This switch should also be connected to pin 7 on the Arduino so you can control it via coding.

LED:

The LED is used to indicated when you're in "menu mode", and the piano keys have been disabled.  The LED light turns on once the menu switch is pressed.  Connect the anode (positive) of the LED to pin 6 of the Arduino, and ground the LED through a 220 ohm resistor.

蜂鸣器:

To integrate the Piezo Buzzer, simply connect one end to the Arduino pin 8, and the other side to ground via a 220 ohm resistor.  The "tone" function in the code will look for this pin in order to play the note called.
 

原理图:



Intro screen for the "menu mode", shown after menu button is pushedFirst song. Cycle through songs by pushing the menu button.Push any piano key to play a song shown on the menu. The LCD will show the current song title.





 

代码 :


// LCD Screen, Switch & LED Setup
#include <LiquidCrystal.h>
#include "pitches.h"
LiquidCrystal lcd(12, 11, 5, 4, 3, 2);
const int LCDswitchPin = 7; // define menu/LCD switch name
int LCDswitchState = 0; // set menu/LCD switch state to off/low
int prevLCDswitchState = 0;
int blueLED = 6;
int LCDswitchCounter = 0;   // counter for the number of menu button presses 
    // (this code counts the menu button pushes, displays them on your computer, 
    // and starts from zero after ending "menu mode". currently has no other effect 
    // on this sketch, but is a good starting point for expanding on the project with 
    // new features later    

// Music Note Keys - Set frequency values
int notes[] = {262, 294, 330, 349, 392, 440, 494}; // Set notes C, D, E, F, G, A, B



//////////////////////////////////////////////
void setup() {
  
  Serial.begin(9600);
  
  lcd.begin(16, 2);
  pinMode(LCDswitchPin, INPUT);
  pinMode(blueLED, OUTPUT);
  digitalWrite(blueLED, LOW); // LED stays off while piano keys are on
  

} // end setup


//////////////////////////////////////////////
void loop() {
  
  LCDswitchState = digitalRead(LCDswitchPin);
  int keyVal = analogRead(A0);
  Serial.println(keyVal);
  lcd.noDisplay();
  digitalWrite(blueLED, LOW); // Turn LED back off every time main loop starts
  


// ************** START "LCDstart" WHEN MENU BUTTON IS PUSHED ***********

    if (LCDswitchState == HIGH)  {
      digitalWrite(blueLED, HIGH); // Turn LED on to show piano keys are disabled and device is in "menu mode"
      lcd.display();
      lcd.clear();
      LCDstart();
      }
   
   
// ***********************************************************************
  
  

////// KEYBOARD NOTES & FREQUENCY STATEMENTS //////
// Use the resistor ladder you created to change the voltage of each piano key button
// 220 ohm = C5 // 560 ohm = D5 // 1K ohm = E5 // etc...
  if(keyVal == 1023)  {
    tone(8, notes[0]); // C
    } // end if
    
        else if(keyVal >= 990 & keyVal <=1010)  {
          tone(8, notes[1]); // D
          } // end else if
    
        else if(keyVal >= 960 && keyVal <= 980)  {
          tone(8, notes[2]); // E
          } // end else if
        
        else if(keyVal >= 900 && keyVal <= 945)  {
          tone(8, notes[3]); // F
          } // end else if
        
        else if(keyVal >= 650 && keyVal <= 710)  {
          tone(8, notes[4]); // G
          } // end else if
        
        else if(keyVal >= 500 && keyVal <= 550)  {
          tone(8, notes[5]); // A
          } // end else if
        
        else if(keyVal >= 5 && keyVal <= 10)  {
          tone(8, notes[6]); // B
          } // end else if
        
        else if(keyVal <= 1)  { // if no switch is pressed, do not play tone
          noTone(8);
          } // end else if

} //end frequency tone loop





/////////////////////////////////////////////////////
void LCDstart()  {
  int keyVal = analogRead(A0);  
  LCDswitchState = digitalRead(LCDswitchPin); // check state of menu button

    while (LCDswitchState == LOW)  { // continue loop while menu button isn't pressed
      LCDswitchState = digitalRead(LCDswitchPin); // check state of menu button every time loop starts
      
      //************* START SONG 1 TITLE LOOP ********************
      if (LCDswitchState == HIGH)  { // if menu button is pressed, then...
        LCDswitchCounter++; // set button count to 1
        Serial.print("number of button pushes:  ");
        Serial.println(LCDswitchCounter);
        delay(300); // min. time until counts adds 1 more

        Song1title();
        lcd.clear();
        break;
        }

      //************* ELSE SHOW MENU ****************
      else   {  // if menu button is not pressed, then...
        LCDswitchCounter=0; // set menu button count to 0
        lcd.clear();
        lcd.setCursor(0, 0);
        lcd.print("WHICH SONG WOULD");
        lcd.setCursor(0, 1);
        lcd.print("YOU LIKE TO PLAY");
        delay(50); // return to main 
        }
     
      } // end while
  } // end LCDstart loop
  
  
  

// ************* SONG 1 LOOP STARTS HERE **************  
void Song1title()  {
  int keyVal = analogRead(A0);
  LCDswitchState = digitalRead(LCDswitchPin); // check state of menu button again
  
  while (LCDswitchState == LOW)  { // continue loop while menu button isn't pressed  
    LCDswitchState = digitalRead(LCDswitchPin); // check state of menu button again 

      //************* START SONG 2 TITLE LOOP ********************
      if (LCDswitchState == HIGH)  { // if menu button is pressed, then...
        LCDswitchCounter++; // set button count to 2
        Serial.print("number of button pushes:  ");
        Serial.println(LCDswitchCounter);
        delay(300); // min. time until counts adds 1 more

        Song2title();
        lcd.clear();
        break;
        }
        
      else  { // if menu button is not pressed   
        int keyVal = analogRead(A0);
        Serial.println(keyVal); 
         
         if(keyVal >= 2)  {
           digitalWrite(blueLED, LOW);
           Song1();
           break;
           } // end if
        
        lcd.clear();
        lcd.setCursor(0, 0);
        lcd.print("SUPER MARIO BROS");
        lcd.setCursor(0, 1);
        lcd.print("   THEME SONG");
        delay(50);
        }
    } // end while song 1 -> 2
        
} // end Song1title loop




// ************* SONG 2 LOOP STARTS HERE **************  
void Song2title()  {
  int keyVal = analogRead(A0);
  LCDswitchState = digitalRead(LCDswitchPin); // check state of menu button again
  
  while (LCDswitchState == LOW)  { // continue loop while menu button isn't pressed  
    LCDswitchState = digitalRead(LCDswitchPin); // check state of menu button again 

      //************* START SONG 3 TITLE LOOP ********************
      if (LCDswitchState == HIGH)  { // if menu button is pressed, then...
        LCDswitchCounter++; // set button count to 3
        Serial.print("number of button pushes:  ");
        Serial.println(LCDswitchCounter);
        delay(300); // min. time until counts adds 1 more

        Song3title();
        lcd.clear();
        break;
        }
        
      else  { // if menu button is not pressed
        int keyVal = analogRead(A0);
        Serial.println(keyVal); 
         
         if(keyVal >= 2)  {
           digitalWrite(blueLED, LOW);
           Song2();
           break;
           } // end if
           
          lcd.clear();
          lcd.setCursor(0, 0);
          lcd.print("SUPER MARIO BROS");
          lcd.setCursor(0, 1);
          lcd.print("   UNDERWORLD");
          delay(50);
          }
        
        } // end while song 2 -> 3
        
} // end Song2title loop




// ************* SONG 3 LOOP STARTS HERE **************  
void Song3title()  {
  int keyVal = analogRead(A0);
  LCDswitchState = digitalRead(LCDswitchPin); // check state of menu button again
  
  while (LCDswitchState == LOW)  { // continue loop while menu button isn't pressed  
    LCDswitchState = digitalRead(LCDswitchPin); // check state of menu button again 

      //************* START SONG 4 TITLE LOOP ********************
      if (LCDswitchState == HIGH)  { // if menu button is pressed, then...
        LCDswitchCounter++; // set button count to 4
        Serial.print("number of button pushes:  ");
        Serial.println(LCDswitchCounter);
        delay(300); // min. time until counts adds 1 more

        Song4title();
        lcd.clear();
        break;
        }
        
      else  { // if menu button is not pressed
        int keyVal = analogRead(A0);
        Serial.println(keyVal); 
         
         if(keyVal >= 2)  {
           digitalWrite(blueLED, LOW);
           Song3();
           break;
           } // end if
           
        lcd.clear();
        lcd.setCursor(0, 0);
        lcd.print("    JEOPARDY");
        lcd.setCursor(0, 1);
        lcd.print("   THEME SONG");
        delay(50);
        }
        
        } // end while song 3 -> 4
        
} // end Song3title loop





// ************* SONG 4 LOOP STARTS HERE **************  
void Song4title()  {
  int keyVal = analogRead(A0);
  LCDswitchState = digitalRead(LCDswitchPin); // check state of menu button again
  
  while (LCDswitchState == LOW)  { // continue loop while menu button isn't pressed  
    LCDswitchState = digitalRead(LCDswitchPin); // check state of menu button again 

      //************* START SONG 5 TITLE LOOP ********************
      if (LCDswitchState == HIGH)  { // if menu button is pressed, then...
        LCDswitchCounter++; // set button count to 5
        Serial.print("number of button pushes:  ");
        Serial.println(LCDswitchCounter);
        delay(300); // min. time until counts adds 1 more

        Song5title();
        lcd.clear();
        break;
        }
        
      else  { // if menu button is not pressed
        int keyVal = analogRead(A0);
        Serial.println(keyVal); 
         
         if(keyVal >= 2)  {
           digitalWrite(blueLED, LOW);
           Song4();
           break;
           } // end if
          
          lcd.clear();
          lcd.setCursor(0, 0);
          lcd.print("     SONG 4");
          lcd.setCursor(0, 1);
          lcd.print("   TITLE HERE");
          delay(50);
          }
        
        } // end while song 4 -> 5
        
} // end Song4title loop




// ************* SONG 5 LOOP STARTS HERE **************  
void Song5title()  {
  int keyVal = analogRead(A0);
  LCDswitchState = digitalRead(LCDswitchPin); // check state of menu button again
  
  while (LCDswitchState == LOW)  { // continue loop while menu button isn't pressed  
    LCDswitchState = digitalRead(LCDswitchPin); // check state of menu button again 

      //************* START SONG 4 TITLE LOOP ********************
      if (LCDswitchState == HIGH)  { // if menu button is pressed, then...
        LCDswitchCounter=0; // set button count to 0
        Serial.print("number of button pushes:  ");
        Serial.println(LCDswitchCounter);
        delay(300); // min. time until counts adds 1 more
        lcd.clear();
        }
        
      else  { // if menu button is not pressed
        int keyVal = analogRead(A0);
        Serial.println(keyVal); 
         
         if(keyVal >= 2)  {
           digitalWrite(blueLED, LOW);
           Song5();
           break;
           } // end if
           
          lcd.clear();
          lcd.setCursor(0, 0);
          lcd.print("     SONG 5");
          lcd.setCursor(0, 1);
          lcd.print("   TITLE HERE");
          delay(50);
          }
        
        } // end while song 4 -> 5
        
} // end Song5title loop





//***************** SONG 1 NOTES HERE **************************

///////////////////////////////////////////////////////////////////////////////////////////////////////
/////////  FULL TUTORIAL ON HOW TO CREATE THE MARIO SONGS CAN BE FOUND HERE:  /////////////////////////
/////////  http://www.linuxcircle.com/2013/03/31/playing-mario-bros-tune-with-arduino-and-piezo-buzzer/  
///////////////////////////////////////////////////////////////////////////////////////////////////////

void Song1()  {
  
  lcd.clear();


// notes in the melody:
int melody[] = {
  NOTE_E7, NOTE_E7, 0, NOTE_E7,
  0, NOTE_C7, NOTE_E7, 0,
  NOTE_G7, 0, 0,  0,
  NOTE_G6, 0, 0, 0,
 
  NOTE_C7, 0, 0, NOTE_G6,
  0, 0, NOTE_E6, 0,
  0, NOTE_A6, 0, NOTE_B6,
  0, NOTE_AS6, NOTE_A6, 0,
 
  NOTE_G6, NOTE_E7, NOTE_G7,
  NOTE_A7, 0, NOTE_F7, NOTE_G7,
  0, NOTE_E7, 0, NOTE_C7,
  NOTE_D7, NOTE_B6, 0, 0,
 
  NOTE_C7, 0, 0, NOTE_G6,
  0, 0, NOTE_E6, 0,
  0, NOTE_A6, 0, NOTE_B6,
  0, NOTE_AS6, NOTE_A6, 0,
 
  NOTE_G6, NOTE_E7, NOTE_G7,
  NOTE_A7, 0, NOTE_F7, NOTE_G7,
  0, NOTE_E7, 0, NOTE_C7,
  NOTE_D7, NOTE_B6, 0, 0
};

// note durations: 4 = quarter note, 8 = eighth note, etc.:
int noteDurations[] = {
  12, 12, 12, 12,
  12, 12, 12, 12,
  12, 12, 12, 12,
  12, 12, 12, 12,
 
  12, 12, 12, 12,
  12, 12, 12, 12,
  12, 12, 12, 12,
  12, 12, 12, 12,
 
  9, 9, 9,
  12, 12, 12, 12,
  12, 12, 12, 12,
  12, 12, 12, 12,
 
  12, 12, 12, 12,
  12, 12, 12, 12,
  12, 12, 12, 12,
  12, 12, 12, 12,
 
  9, 9, 9,
  12, 12, 12, 12,
  12, 12, 12, 12,
  12, 12, 12, 12,
};


      lcd.setCursor(1, 0);
      lcd.print("Now playing...");
      lcd.setCursor(0, 1);
      lcd.print("MARIO THEME SONG");
     
      


    int size = sizeof(melody) / sizeof(int);
    for (int thisNote = 0; thisNote < size; 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:
      tone(8, 0, noteDuration);
 
    }


Song1title();

  
  } // end Song1 loop



//***************** SONG 2 NOTES HERE **************************

///////////////////////////////////////////////////////////////////////////////////////////////////////
/////////  FULL TUTORIAL ON HOW TO CREATE THE MARIO SONGS CAN BE FOUND HERE:  /////////////////////////
/////////  http://www.linuxcircle.com/2013/03/31/playing-mario-bros-tune-with-arduino-and-piezo-buzzer/  
///////////////////////////////////////////////////////////////////////////////////////////////////////

void Song2()  {
  
  lcd.clear();


// notes in the melody:
int melody[] = {
  NOTE_C4, NOTE_C5, NOTE_A3, NOTE_A4,
  NOTE_AS3, NOTE_AS4, 0,
  0,
  NOTE_C4, NOTE_C5, NOTE_A3, NOTE_A4,
  NOTE_AS3, NOTE_AS4, 0,
  0,
  NOTE_F3, NOTE_F4, NOTE_D3, NOTE_D4,
  NOTE_DS3, NOTE_DS4, 0,
  0,
  NOTE_F3, NOTE_F4, NOTE_D3, NOTE_D4,
  NOTE_DS3, NOTE_DS4, 0,
  0, NOTE_DS4, NOTE_CS4, NOTE_D4,
  NOTE_CS4, NOTE_DS4,
  NOTE_DS4, NOTE_GS3,
  NOTE_G3, NOTE_CS4,
  NOTE_C4, NOTE_FS4, NOTE_F4, NOTE_E3, NOTE_AS4, NOTE_A4,
  NOTE_GS4, NOTE_DS4, NOTE_B3,
  NOTE_AS3, NOTE_A3, NOTE_GS3,
  0, 0, 0
};

// note durations: 4 = quarter note, 8 = eighth note, etc.:
int noteDurations[] = {
  12, 12, 12, 12,
  12, 12, 6,
  3,
  12, 12, 12, 12,
  12, 12, 6,
  3,
  12, 12, 12, 12,
  12, 12, 6,
  3,
  12, 12, 12, 12,
  12, 12, 6,
  6, 18, 18, 18,
  6, 6,
  6, 6,
  6, 6,
  18, 18, 18, 18, 18, 18,
  10, 10, 10,
  10, 10, 10,
  3, 3, 3
};


      lcd.setCursor(1, 0);
      lcd.print("Now playing...");
      lcd.setCursor(0, 1);
      lcd.print("MARIO UNDERWORLD");
     
      


    int size = sizeof(melody) / sizeof(int);
    for (int thisNote = 0; thisNote < size; 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:
      tone(8, 0, noteDuration);
 
    }


Song2title();

  
  } // end Song2 loop


//***************** SONG 3 NOTES HERE **************************
void Song3()  {
  
  lcd.clear();


// notes in the melody:
int melody[] = {
	NOTE_C2, NOTE_F3, NOTE_C3, NOTE_A2, NOTE_A2,
	NOTE_C3, NOTE_F3, NOTE_C3,
	NOTE_C3, NOTE_F3, NOTE_C3, NOTE_F3,
	NOTE_AS3, NOTE_G3, NOTE_F3, NOTE_E3, NOTE_D3, NOTE_CS3,
	NOTE_C2, NOTE_F3, NOTE_C3, NOTE_A2, NOTE_A2, // repeat line 1 and 2
	NOTE_C3, NOTE_F3, NOTE_C3,
	NOTE_AS3, 0, NOTE_G3, NOTE_F3,
	NOTE_E3, NOTE_D3, NOTE_CS3, NOTE_C3};

// note durations: 4 = quarter note, 8 = eighth note, etc.:
int noteDurations[] = {
	4,    4,    4,    8,   8,
	4,    4,          2,
	4,    4,    4,    4,
	3,    8,    8,    8,    8,   8,
	4,    4,    4,    8,    8, // repeat line 1 and 2
	4,    4,          2,
	4,    8,    8,    4,    4,
	4,    4,    4,    4,
	0};


      lcd.setCursor(1, 0);
      lcd.print("Now playing...");
      lcd.setCursor(0, 1);
      lcd.print("    JEOPARDY");
     
      

  for (int thisNote = 0; noteDurations[thisNote] != 0; 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 = 2000/noteDurations[thisNote];
    tone(8, melody[thisNote],noteDuration * 0.9);

    // 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);
	delay(noteDuration);
  }


Song3title();

  
  } // end Song3 loop


//***************** SONG 4 NOTES HERE **************************
void Song4()  {
  
  lcd.clear();


// notes in the melody:
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
};


      lcd.setCursor(1, 0);
      lcd.print("Now playing...");
      lcd.setCursor(0, 1);
      lcd.print("  SONG 4 TITLE");
     
      

      int thisNote = 0;

        // to calculate the note duration, take one second
        // divided by the note type.
        //e.g. quarter note = 1000 / 4, eighth note = 1000/8, etc.
      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);
        noTone(8); // stop the tone playing:
        } // end for


Song4title();

  
  } // end Song4 loop


//***************** SONG 5 NOTES HERE **************************
void Song5()  {
  
  lcd.clear();


// notes in the melody:
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
};


      lcd.setCursor(1, 0);
      lcd.print("Now playing...");
      lcd.setCursor(0, 1);
      lcd.print("  SONG 5 TITLE");
     
      

      int thisNote = 0;

        // to calculate the note duration, take one second
        // divided by the note type.
        //e.g. quarter note = 1000 / 4, eighth note = 1000/8, etc.
      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);
        noTone(8); // stop the tone playing:
        } // end for


Song5title();

  
  } // end Song5 loop


代码工作流程 :

the set up...

  • The sketch begins by importing the "LiquidCrystal.h" and "pitches.h" libraries so we can reference various items from them later on in the code
  • Next, the code is set up by defining a name for the menu switch, determining which pins are inputs vs. outputs, and setting the frequency values for each of the 7 piano keys
  • A new tab was created for each individual song in an effort to keep my code somewhat organized and easier to understand, and to expand on later.  If you'd like to delete or add more songs, just make sure to change the code in the main "Electronic Keyboard" sketch as well.

the main loop...

  • The keyboard begins with the LED turned off, and all of the piano keys active
  • Once the loop detects that the menu button has been pushed, it will disable the piano keys and turn the LED on to indicate you are in "menu mode"


accessing the menu...

  • Push the menu button to cycle through the present songs, and push any of the piano keys to start playing the song displayed on the LCD screen
  • The LCD screen will show which song is currently playing, then return to the same point in the menu once the song has finished playing.  From there, you can either replay or continue in the list of available songs.
  • Double-clicking the menu button will restart the menu from the beginning
  • To return to using the piano keys, cycle through the remainder of songs in the menu.  Once the LCD screen in blank, and the LED is off, the piano keys will work again.

原件列表:

Ardgen uno
Arduino UNO & Genuino UNO
 
× 1  
181 02
LCD - 16x2
× 1  
Omron b3f 1000 image 75px
按键
 
× 8  
 
220欧姆电阻
 
× 4  
 
560欧姆电阻
 
× 1  
Mfr 25frf52 1k sml
1k欧姆电阻
 
× 1  
 
4.7k欧姆电阻
 
× 1  
Mfr 25frf52 10k sml 10k欧姆电阻
 
× 3  
Mfr 25frf52 1m sml
1M欧姆电阻
 
× 1  
Adafruit industries ada1536 image
蜂鸣器
 
× 1  
09590 01 LED
 
× 1  
Bourns 3362p 1 103lf image 160px
10k电位计
 
× 1  
11026 02
连接线
 
× 1  
12002 04
面包板
 
× 1  

头文件:下载地址

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