This document provides instructions for building a DIY piano using an Arduino board, push buttons, jumper wires, and piezo buzzers. It consists of 8 steps: 1) Connecting one push button, 2) Connecting the remaining 7 push buttons, 3) Connecting a piezo buzzer, 4) Connecting jumper wires from the Arduino to the breadboard, 5) Connecting ground wires, 6) Connecting jumper wires from the Arduino pins to the push buttons, 7) Connecting all the push buttons, and 8) Providing a code sample to play notes when buttons are pressed. The code uses while loops to continuously play tones corresponding to each note's frequency until the associated push button

1. Parts Required:
Project 8 : Make your own Piano
What we are making
Lets make our own piano on which we can play any music !
PARTS :
+ This section lists the parts you
will need to complete the project.
JUMPER
WIRES
x 19 x 1
PIEZO
BUZZER
x 8
PUSH
BUTTON
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PROJECT 8

2. Step 1:
PROJECT 8 : MAKE YOUR OWN PIANO
Connect one push button as shown in the image below.
The 4 pins of the push-button should go in 1-e, 1-f, 3-e, 3-f
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3. PROJECT 8 : MAKE YOUR OWN PIANO
Step 2:
Connect remaining 7 push buttons to the breadboard as
shown below.
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4. PROJECT 8 : MAKE YOUR OWN PIANO
Step 3:
Connect the longer-leg of a Piezo Buzzer to 30-e.
Connect the other end to 30-f.
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5. PROJECT 8 : MAKE YOUR OWN PIANO
Step 4:
Connect one end of a jumper wire to Pin 2 on Arduino.
Connect the other end to 30-a on breadboard.
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6. PROJECT 8 : MAKE YOUR OWN PIANO
Step 5:
Connect one end of a jumper wire to GND on Arduino. Other
end to negative (-) line on breadboard.
Connect another jumper wire from 30-h to negative (-) line on
breadboard.
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7. PROJECT 8 : MAKE YOUR OWN PIANO
Step 6:
Now let us start the Push Button wirings.
Connect a jumper wire from Pin 12 (6th pin from top) on Arduino
to 3-j on breadboard.
Connect another jumper wire from 1-j to negative line on
breadboard.
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8. PROJECT 8 : MAKE YOUR OWN PIANO
Step 7:
Let us connect all push buttons as shown in below picture.
Start from Push Button 2. Connect both its jumper wires.
Then move to the next push buttons.
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9. PROJECT 8 : MAKE YOUR OWN PIANO
Note that you can use any color jumper wires.
In previous diagram, same color of wires are used for same
push button so that it’s easy for you to follow the circuit diagram.
This completes our circuit !
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10. Step 8: 82
The code for this project is available on the installation-instruction page.
Follow below steps to see the code:
1. On your computer, open a browser like Chrome or Internet Explorer.
2. Visit https://getelemento.com/pages/installation-instructions in the browser.
3. Scroll to the Piano section on the page to see the code.
BINGO !!
Try playing the ‘Happy Birthday’ song:
C C D C F E
C C D C G F
C C C A F F E D
Now, pushing each button should give you the
corresponding notes sound.
You can chose to play any kind of tone that you want !

11. Explanation:
PROJECT 8 : MAKE YOUR OWN PIANO
Remember that each note of Sa, Re, Ga, Ma, Pa, Dha, Ni, Sa
has a different frequency.
We pass this frequency to the tone() function to get the corresponding
sound.
int Buzz = 2;
In our code, we declare a variable called Buzz and assign 2 to it.
2 is the pin number to which the Piezo buzzer ic connected. Now, in our
code wherever we use the variable Buzz, it will mean 2.
In the setup() function, we set all push button pins as INPUT so that our
code can read the value of push button when its pressed.
In the loop() function, we check the value of each push button,
and if it’s pressed (i.e. its corresponding pin reads LOW), we pass
the corresponding frequency to the tone() function.
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12. Question:
The while loop executes some code continuously until a condition is met.
eg:
while(digitalRead(12) == LOW)
{
tone(Buzz,262);
}
The while() loop has 2 parts: ‘condition’ and ‘code statements’.
In our program, digitalRead(12) == LOW is the condition.
tone(BUZZ, 262) is the ‘code statement’.
The Arduino will keep checking the condition and execute the tone() code
only if this condition is TRUE. So, the Arduino will read pin 12
(connected to Sa / C) and see if it’s pressed (When push button is pressed,
pin 12 will read LOW). Till the time the push button is pressed, our code will
play the Sa / C note on buzzer. Do not worry if you did not understand the
while loop fully. The C language concepts will become clearer as we move
along in this course.
What does the while() statement do in the program ?
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