How To Play Audio On A Bluetooth Speaker Using A Mini MP3 Player

What’s In This Page

This page contains step by step instructions on how to play audio that is on the SD card of a mini MP3 player on a commercially manufactured Bluetooth Speaker.

It also contains a video demonstration.

For instructions showing you how to use a DIY bluetooth speaker, go here.

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How It Is Used

Background sounds in any scene (running water for a scene river or waterfall, city street sounds, construction and machine shop or factory sounds, locomotive and general train sounds on a layout., and so on.)

Carols in a Christmas village.

Materials

Bluetooth Speaker

Bluetooth speakers come in many shapes, sizes and price ranges. When choosing one, be sure to check what is said about its audio quality. Lower priced models will usually have lower audio quality.

For a modeler or diorama maker, high quality audio is not a necessity. Thunder, trains bells and other typical sounds used by these folks plays sufficiently well on a low quality speaker.

In any case the instructions that come with a speaker tell you how to power it and prepare it for pairing with the mp3 player.

MP3 Player

Attached to the MP3 player must be a Bluetooth transmitter module. It is important to note that this is not an HC-05 in transmit mode. An HC-05 transmits and receives data. A Bluetooth transmitter module transmits audio.

The transmitter module will have four pins. +5v, Grnd, Audio L and Audio R. +5v and Grnd connections are self explanatory. Audio L and Audio R connect to Spkr1 and Spkr2, respectively, on the MPs player.

To Start Playing

Turn player and Bluetooth speaker power on.

The led on the audio transmitter will flash rapidly

Press button on the audio transmitter to put it in pairing mode. The flash rate of the led will slow indicating it is ready to pair.

Follow the instructions for your Bluetooth speaker to have it pair.

When the player starts, you will hear the audio on the Bluetooth speaker.

One paired, the speaker and player stay paired.

Video Demonstration

Video in Editing.

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