Introduction: Playing Wave File Using Arduino

Picture of Playing Wave File Using Arduino

This is a simple circuit to play wav files using arduino Nano V3.0 ,it consist from 4 buttons ,each one play specific wav file loaded to SD card.

Step 1: Parts

Picture of Parts

1- Arduino Nano V3.0 (I used the chines version called Funduino Nano).
2- SD card Module.
3- SD card.
4- Bread Board.
5- four push Button .
6- four 22K resistors.
7- one 4.7K resistor.
8- BC546B NPN transistor.
9- Speaker.
10- wires.

Step 2: Prepare Your SD Card

Picture of Prepare Your SD Card

1- Format SD card and make sure the setting as attached picture.
2- Convert your music to .WAV files and make sure the below:
-Samples Per second(Hz):16000
-Channel :Mono
- Bits Per Sample: 8
I use Wav Sample rate converter software (picture attached).
3- Wave files samples attached.

Step 3: Circuit Digram

Picture of Circuit Digram

Step 4: Source Code

Picture of Source Code

1-Before writing the code you need to install TMRpcm library from below link:
all information how to install and use the library included in the website .

2- Download the attached file and open it with arduino sketch ,I tried to copy and paste the Source Code from arduino sketch to instructable but for some reason the text convert to rubbish.

Step 5: Troubleshooting Update 29/5/2016

For people whom unable to make this circuit work ,I created the attached folder "for test" for troubleshooting purpose .

The folder includes tested code for Arduino Nano ,UNO and MEGA.

No need to connect the push buttons,the sounds will play automatically.

No need to connect the transistor ,Connect a small speaker or headphone directly to pin 9 for arduino nano or pin 11 for Mega .

Copy the .wav files directly to SD card ,Do not put them inside folder.

Pin Connection:

Arduino Nano ---------> SD Card

12 -------------------> MISO

11 -------------------->MOSI

13 -------------------->SCK

4 ---------------------->CS

9 ---------------------->Speaker

GND ------------------>GND

5V ------------------> VCC

Arduino MEGA ---------> SD Card
50-------------------> MISO


52 -------------------->SCK



GND ------------------>GND

5V ------------------> VCC

if the tested code worked fine do the following for the push buttons code file to make it work:

1-If you faced problem in compiling the original push buttons code file ,please add line #include<SPI.h>

in the 3rd line of the code.

still have no sound add a delay command between the play commands delay(1000);

Good luck



geo-sun (author)2017-12-28

I need help, mine works with sample files but If I try to play music it just makes buzzing sound.

ParkerO (author)2017-10-07

I need help. Im using the UNO and i uploaded it and no audio. No static. Nothing. Im using a 5W 8Ohm speaker.

bmegirl made it! (author)2016-04-04

Hey, I had some questions. i used a BC547B, i built my circuit as shown in the pictures below, i converted my files to .wav format. the problem is, my code complies, but when i push the buttons, no sound is produced.

also i used an uno board

thank you!

Husham Samir (author)bmegirl2016-05-14


I notice from your picture that pin 4 in arduino not connected ,it should be connected to CS pin in SD card.

revlied (author)Husham Samir2017-10-05

i also used a bc547b and no sound plays. but I'm using the nano. Help.

sophocha made it! (author)bmegirl2016-04-11

me too, just finished compiles just fine but no sound (if I put my ear really close to the speaker I can hear static).My push buttons have two outputs instead of one so I connected them differently (don't know if that is the problem)

bmegirl (author)sophocha2016-04-11

@sophocha the only other to do is trouble shoot and make sure your circuit is correct. It could be the smallest of errors.

sophocha made it! (author)bmegirl2016-04-11

me too, just finished compiles just fine but no sound (if I put my ear really close to the speaker I can hear static).My push buttons have two outputs instead of one so I connected them differently (don't know if that is the problem)

bmegirl (author)sophocha2016-04-11

Also trying to integrate lights to mine. I want an LED to blink when the button is pressed and then the sound plays, u have momentary switches that have LEDs

revlied (author)2017-10-05

I'm done i press the buttons, nothing happens. No errors in the script.

ĐorđeM2 (author)2017-06-10

I have connected all as you, but my speaker is too quiet. But if I change volume, then quality goes horrible, I can't hear anything. Help?

HaqiK (author)2017-04-28

Hey guys I love your tutorial and thanks for great help :) anyway I tried with my own sound and have some problem with the sound, the sound doesn't clear to hear and I tried to volume up the sound with potentio too but no luck, anyone knows to volume up with this library?

Thanks for your help :) :) :)

ümit emreo (author)2017-04-27

Thanks for help.

Autoraf (author)2017-03-27

Hello everybody! I made this project but there is a noise like motorcycle wirh the sound from sd card. Can you help me? Tks!

tuang.pingfavilunda (author)2017-03-15

the "For" has no UNO file. Can you provide that ? I have been struggle with this project for weeks now. I need some sample with .wav file and yours seems nice. Ps. I tried change pin 4 to 10 already since I have read somewhere that UNO needs pin 10

YusdiI (author)2017-01-28

Thank, n nice project

sgarbo made it! (author)2017-01-10

This is a great project. I would enjoy adding an LED To blink to the sound as it plays but I am having no luck . I would love suggestions I have tried many things with no luck

ahmadA273 (author)2016-11-27


tsnijder (author)2016-11-21


Is it possible to play each sound on a different speaker?

domdomgin (author)2016-10-19

spi was not declared in this scope..please help..

hungrycatz (author)domdomgin2016-11-12

try including the spi library - #include <SPI.h>

Nolan Cash (author)2016-09-17

hey, just a heads up, when pinning the transistor be sure to look up the pinout and double check before soldering. or you can do what i did and just look at the shape and trust the rest. then spend 3 days trouble shooting. the transistor in the diagram is inverted.

aside from that learning experiance, this is an awesome project and im not sure how but i would like to post a video when i get the entire project done.

badedin (author)Nolan Cash2016-09-29

husham seems like not here that often ..

can you possibly help me nolan?

Nolan Cash (author)badedin2016-10-13

sorry for the late reply, and ill try and help as best i can. is your question about the one button making random wav files play?

SyedS80 (author)2016-08-28

nice work !! sir can u please tell if i connect an audio amplifier instead of directly connecting the speaker to get more sound ??

AndreM45 made it! (author)2016-07-14

Hello, thank you for your guide, it make my project finished. But i have one question, can we pause the wav when that wav was playing?
Thank you

yehan (author)AndreM452016-08-16

audio.pause(); pauses and unpauses the playback

EpeTuk (author)2016-08-07

Hello, thank you for the article, it is very helpful. I do tank on the bluetooth control, and I need the engine sounds. Please tell me: where you took them.

ClémentT2 (author)2016-08-04

Hep! Thanks for this tuto its working, Ive a question, i would like to know if it possible that the sample play when you press the button, because at the moment le sample play when you release the button (LOW position) and there is a noise when you press (If you keep the HIGH position), do you have an idea ?

Second point, Ive a keypad (3x4 with 7 pins) do I need to use de keypad librairy to use de 12 buttons or is it possible just with the TRMpcm library ?

ClémentT2 (author)ClémentT22016-08-04

Point 3: Is it possible to play the sample together ?

revlied (author)2016-07-20

What type of 22k resistor do you need? how many wats? 1/4? 1/2?

Ishutaru (author)2016-07-04

Hello there. Thank you for your guide, I made it using Uno R3 and SD module and it worked. Now I face a little problem with Mega 2560 + LCD screen with SD card reader. I am using library UTFT SdFat and UTFT_SdRaw to display images from SD card on LCD screen. TMRpcm library needs SD library to work but when I include it I get lots of errors that point to SD and SdFat. When I upload your code Mega 2560 plays from SD card without any problems. Is there any way to make TMRpcm work on SdFat only?

Husham Samir (author)Ishutaru2016-07-07


I didn't try this before so I have no idea.


Ishutaru (author)Husham Samir2016-07-09

I am now making a workaround. I connected Nano+SD module to Mega 5V so that Mega is now powering on my Nano.. Well it's a strange idea, but all I need is background music with no control over it. Nano plays music by itself using SD library and Mega works with LCD using UTFT_SdRaw. Too bad I have to connect 2 SD cards now :D. My power bank is 5V/1A.

yanesi (author)2016-07-08

Hello Husham where download library UTFT_sdRaw, where the codec download and .raw file in Windows 10.

AashayC1 (author)2016-07-01

can i use arduino uno 3 as i have to make a voice comand blind helmet

Husham Samir (author)AashayC12016-07-07

yes you can.

please put in your mind that the quality of voice is bad ,so if you want a good quality ,try to connect arduino to MP3 serial module.

licheong made it! (author)2016-06-25

Hi, I've tried to make one. The SD card reads and writes without problem, but the sound from the speaker is very noisy and distorted. I'm using a BC547 transistor and a 0.2W/16ohm speaker. I'm not sure if the resistance of the speaker is too high? Thanks very much!

licheong (author)licheong2016-06-25

I tried once again, this time simply connect a 220ohm resistor in series with the speaker and it works. I've tried with your 'nano' sketch. The first few files sound okay, but the last file 88.wav still sounds very distorted. What do you think could be the problem? Thanks!

Husham Samir (author)licheong2016-06-26

Well, Music quality looks better than voice ,you can download "Wav Sample rate converter" software and try to change the samples per sec to 8000 and check.

licheong (author)Husham Samir2016-06-27

Thanks! I've been using Reaper, and the sound quality worsened after down sampling. Let me try the software you suggest.

badedin (author)2016-06-26

i wonder how to make one button which plays a random wav each time.

Husham Samir (author)badedin2016-06-26

to get random number you need to use arduino random(min,max) command with switch/case statements .

JonathanG118 (author)2016-06-26

Hi, i have an atmega8 with the arduino bootloader, this will work on it?thanks

I'm not sure if the library support atmega8.

check below link for library feature :

Supported devices: Arduino Uno, Nano, Mega, etc.

Б.Б9 made it! (author)2016-05-27

its working

Husham Samir (author)Б.Б92016-05-28

Great Work,Congrats.

Б.Б9 (author)Husham Samir2016-05-28


mursidsuyana made it! (author)2016-05-20

Hai Husham, How do you do?

recently i tried this for my final project. but this was not working at all. i used wav files u provide. was theere something wrong on my wiring? thanks

try to remove the transistor and connect a head phone ,if you hear something that's mean that you connect the transistor wrongly ,if not check the connection again ,and have a look on below comments ,you may find the solution.

About This Instructable




Bio: Electrical Engineer
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