How and Which type of Speakers can be used with an Arduino Uno?

[thundxrwolf]

Hello,

I am currently working on a project that requires a speaker to output 1-3 second sound files. I am very unfamiliar with the connection of speakers and arduinos, but if anyone has any recommendations as to how I may connect an arduino to a speaker (without external power), then I would greatly appreciate it. Note that I am using an arduino uno.

As I was researching, I came accross some curcuits using an amplifier. Some of which used a 2N2222 transistor as an amplifier. I am not sure if I will need one, but if anyone has information about it, then it would be very helpful.

Thank You,
Thunder

[LarryD]

@thundxrwolf

speaker to output 1-3 second sound files

• look into the DFPlayer

[gilshultz]

@thundxrwolf

connection of speakers and arduinos

Many times that results in a fried Arduino. Check these simple rules:
Gil's Crispy Critter Rules, they apply to processor hardware:
Rule #1. A Power Supply the Arduino is NOT!
Rule #2. Never Connect Anything Inductive (speaker) to an Arduino!
Rule #3 Don't connecting or disconnecting wires with power on.
Rule #4 Do not apply power to any pin unless you know what you are doing.
LaryD's Corollary's
Coro #1 when first starting out, add a 220R resistor in series with both Input and Output pins.
Coro #2 buy a DMM (Digital Multi-meter) to measure voltages, currents and resistance. Violating these rules tends to make crispy critters out of Arduinos.
Hint: It is best to keep the wires under 25cm/10" for good performance.

[TomGeorge]

Hi, @thundxrwolf

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What player are you using?

Please post a link to specs/data of the player.
Some players can drive a small speaker directly.

Thanks.. Tom..

[Terrypin]

@Delta_G

It's a non-starter then. You really can't drive a speaker from an Arduino directly

Not so. Several of my DFR MP3 Player projects run from Uno and Nano 5V supplies, delivering adequate volume to an average room. Unless I’ve misunderstood and you mean without the aid of any other module?

[DVDdoug]

The simplest solution is regular "powered" computer speakers. Just make sure they have analog inputs... USB power is OK but you need an analog audio input.

You can make a driver/amplifier from a transistor or MOSFET. It doesn't have to be a linear audio amplifier because the UNO doesn't have an analog output. (A linear amplifier is a little trickier to build and it usually takes more than one transistor.)

Or you can build or buy a little audio amplifier, and since it is linear you can have a volume control. (There are lots of audio amplifier chips if you want to build one. Makes sure to get one designed to drive a speaker.)

[thundxrwolf]

Thank you to everyone who responded. I will take all of this into account with this project.