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By Alexsandar | 14 November 2017 | 231 Comments

Simple Arduino Sound Board

In this experiment you will understand how a passive buzzer works and how you can create a simple Arduino sound board. Using some buttons and choosing a corresponding tone, you can create a melody! The parts that I've used are from Kuman ARDUINO UNO ATARTER KIT

Step 1: Parts Needed

You will need:
an Arduino board
a breadboard
an USB Cable
10 x Jumper wires
3 x Buttons (number of caps and buttons is optional)
3 x 10k ohm resistors

Step 2: Connecting the Buttons

Firstly, lets start with the buttons. For each button, choose one of it's sides. You will see 2 pins. The one on the left (you can swap them as well) connects to ground of the Arduino (through the breadboard) with a 10k resistor. Connect the same row to digital pin 2, 3 or 4 of the Arduino (can be configured in the code). The pin on the right side of each button connects to 5V. You can use the above picture for reference. Do these steps for all of your buttons.

Step 3: Connecting the Buzzer

So, on the top of the buzzer you can see a + symbol. It indicates the positive side of it. You need to connect the opposite end to ground and this one to digital pin 8 of the Arduino (can be changed later)

Step 4: Uploading and Modifying the Code

You can find the code of the project HERE. It's completely up to you on what you can modify - from the pin numbers to adding more buttons, but more importantly - you can change each individual tone. Here is a little explanation:
tone(buzzPin, 1000, 300); // Here is the Arduino tone function
buzzPin is the positive pin of the buzzer
1000 is the tone itself, in Hz (it can be anywhere from 31 all the way to 65535)
300 is the duration in ms (optional)

Step 5: Video

Here is a video of the project in action, creating a random melody.

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