How to Connect 8 Ohm Speaker Arduino- Complete Guide

Arduino is a famous and prominent manufacturer, especially when it comes to electronics. Their speakers, like the 8 ohm Arduino speaker, are associated with excellent audio in the market. However, you may not feel the best side of it if you connect it wrong.

To spare you from such hassles, we have carried out an in-depth research on your behalf. After reading this article you will be able to safely connect 8 ohm speaker Arduino. What I mean is that a wrong connection will result in poor audio quality.

Briefly, the knowledge you expect to meet in this article include the procedure of connecting 8 ohm speaker Arduino.  Therefore to effectively connect an 8 ohm speaker from the Arduino, you will require an amplifier.

Comprehensive guide on connecting 8 ohm speaker Arduinohow to connect 8 ohm speaker arduino

To correctly achieve this, you require some directives and that’s exactly what we are trying to give you. There’s no need to waste much time on the introductory part; let’s know what the article entails.

Step 1: Gathering essentials

This step is nothing more than collecting materials and tools you will require to connect the speaker. For our case, LM386 can be the best and reliable amplifier for connection. However, this amp isn’t suitable for battery-based applications.

Other must have materials you require for this tutorial includes;

Arduino board

A small 8 ohm speaker

A 10 k resistor

A push button

Solid core wires

With such materials in place, your work will be made easier and you will spend less time.

Step 2: Play a melodyPlay a melody

The first thing before kicking off the connection process is to run a default melody program. Doing so will help you understand what to anticipate from your Arduino. For example, you can get a melody from the Arduino IDE. Therefore, you don’t have to worry about anything.

Under this step, you require a file that outlines your tones, though it can be found in the IDE. Upload the coding and hook up the speaker positive to pin 8, negative to ground, you will hear a diminutive tune.

Step 3: Tone functionTone function

There is a function in Arduino called the Tone which is introduced by playing music. Such a function is amazing as it helps in controlling your ability to play audio. When presented in the code you will see something like; tone (frequency, pin, duration) or tone (pin, frequency).

Here, the pin represents the jack where you hook up the speaker and the frequency is identified in hertz. The duration is identified as how long and measured in milliseconds. In step 2 above, pitches.h file is included for melody. The file is responsible for offering you various choices for each tuned note. Therefore, there is no need to tackle basic notes; writing songs is therefore easier.

Step 4: Making a simple keyboardMaking a simple keyboard

This step involves combining some materials to form a single and simple keyboard. The step entails the combination of elements that are used to make tones and give them a push button feature for making sound. There is also coding that you are supposed to meet starting from the “pitches.h” file.

After loading the code and joining the circuit, the next action will be to press the button. Pay much attention to hear anything like a C note.

Step 5: Testing the artwork

It’s now time to roll out! After a successful connection, the next thing you can do is to enjoy the music. Alternatively, you are free to top up the Arduino with more notes by adding more codes and more buttons. This is something you can build yourself.

Component of Arduino UNOComponent of Arduino UNO

The Arduino features various specifications and components like;

Ground Pin: The board has several ground pins

PWM: This stands for Pulse Width Modulation and the board has 6PWM pins responsible for controlling the servo motor’s speed. It can also control the DC motor and LED brightness.

Analogue Pins: The board also has a total of six analogue pins, mounted together. The pins are responsible for reading analogue sensors and converting them to digital signals.

ATmega328: This component stores the program and acts as the board’s brain.

AREF: This abbreviation stands for Analogue Reference Pin, responsible for setting an external reference volt.

Digital I/O Pins: The board boasts 14 digital pins that you can connect with any external electronic equipment.

5V: This is a type of pin, responsible for supplying 5 Volt power to specific projects.

Micro SD Card: This function helps the board to accommodate a micro SD card.

Power LED: It’s simply the power LED, displayed when the Arduino board is connected to the power source.

DC Power Jack: It’s where power is connected to run the board

USB Interface: The feature is necessary for connecting the board to your computer for updating the Arduino program/sketches.

Reset Button: Here is another critical feature that is responsible for resetting the code entered into the Arduino board. You are allowed to use the button whenever the board jams. In short, pushing the button will take the board back to its normalcy.

SPI: This abbreviation is the shortest form of Serial Peripheral Interface. There are for pins i.e., 10(SS), 11(MOSI), 13(SCK), and 12(MISO).

Applications of Arduino UNOApplications of Arduino UNO

There are several scenarios that you might find Arduino boards useful. You can incorporate it with Raspberry Pi, or another Arduino board. Sometimes you can use it as a standalone project. Below are some of the applications of Arduino UNO;

  • Parking Lot Counter
  • Home Automation
  • Weighing Machines
  • Medical Instrument
  • Traffic Light Countdown Timer
  • Railways Emergency Light
  • Embedded systems
  • Industrial Automation


  • How can I convert text to speech in Arduino?

Start by connecting the amplifier circuit to the power source and then followed by the digital pin 3 to the 10K resistor. You should also remember to connect the grounding. Connect the speaker, starting by negative (-) terminal to the ground. Positive terminal should be connected to the 220µF capacitor. Power the Aruino.

Final words

Hopefully, you have found this article useful. We have tried to cover wide information on how to connect 8 ohm speaker Arduino. Besides, we have explained various components and applications of Arduino technology.

Leave a Comment