How to Build Your Own Portable DIY MP3 Player

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How to Build Your Own Portable DIY MP3 Player

MP3 players are widely accessible in stores. But what’s the point of purchasing when you can make your own? If you are a maker and like DIY, this project will guide you through the process of creating a compact battery-powered mp3 player with a 3.5mm headphone port (to connect your headphones or aux) that you can take with you wherever you go. You may also make a portable MP3 player with a pair of speakers.

Furthermore, you may connect this module to an Arduino or any other microcontroller with RX/TX capabilities, such as the ESP8266, and combine it with Home Assistant to play speech notifications or sound an alarm.

What Is DFPlayer?

DFPlayer is a low-cost tiny MP3 player module that can play music or audio (MP3 files) via a speaker. This module may be used for a number of purposes. You may use it to make a solo music player, add buttons to control its different functions and modes, or couple it with an Arduino or an ESP8266 to control it wirelessly.

Specifications:

  • Allows for sample rates of 8/11.025/12/16/22.05/24/32/44.1/48. (kHz)
  • 24 -bit DAC output
  • 90dB Dynamic range
  • 85dB SNR support
  • FAT16 and FAT32 file systems are supported.
  • Supports up to 32G TF card
  • There are three control modes: I/O control, Serial control, and AD button control.
  • 30 level Volume control
  • 6 -level Music EQ

What Do You Need to Build a DIY MP3 Player?

To build a portable DIY MP3 player, you need the following:

  • Module DFPlayer Mini MP3 Player
  • SD memory card (any card between 100MB-32GB)
  • 1 x 3W Speaker (50mm)
  • A potentiometer is attached to a PAM8403 3W small 5V digital amplifier circuit (optional)
  • 2 x MP3 player control pushbuttons
  • To power the gadget, use a micro USB breadboard 5v power supply module or a TP4056 1A Li-ion battery charging module with a 3.7v 500/1000/2000mah LiPo or 18650 battery.
  • All of the components are housed in a 3D printed casing. Download this scaled 3D Case for an MP3 player that can accommodate a 49mm-51mm speaker.
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Skills Required

You must have prior expertise soldering electrical components. If you’ve never soldered a component or used a soldering iron before, utilize this article to master some basic soldering techniques.

If you don’t want to solder and just want to test or create something for fun, you can use a breadboard.

Steps to Build a DIY MP3 Player

Follow the steps given below to build a DIY MP3 player.

Step 1: Build the Control Panel

A generic PCB is required to create the control panel to operate different operations such as increasing or decreasing volume, playing or pausing music, or switching to the previous or next track. If you don’t have a standard PCB.

  • As indicated in the figure, connect the resistors to one of the terminals on each of the three push buttons.
  • Then, in parallel, connect the other terminals of the push buttons and solder them to the GND terminal on the DFPlayer.
  • Connect all resistors to the DFPlayer’s ADKey 1 terminal.
ButtonFunction
B1Play/Pause
B2Volume-/Previous (Long Press)
B3Volume+/Next (Long Press)

Step 2: Connect Speakers

Speakers may now be added to the DFPlayer module. The module can easily power two 3W 4/8 ohm speakers. If you have a 3W speaker, you may connect it directly to the DFPlayer, as illustrated in the figure below.

You may alternatively connect the speaker to a PAM8403 3W small 5V digital amplifier board and adjust volume using the volume knob.

If you wish to connect larger speakers for louder sound, place a more powerful amplifier module between the DFPlayer and the speakers.

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Once all of the connections are complete, attach a 5V power source to the female micro USB and solder the two wires to the DFPlayer as indicated in the image below.

You may also use a 5mm male-female DC power jack to supply 5V power through any 5V adapter.

Step 4: Copy MP3 Files to SD Card

You can create up to 100 folders and add up to 255 songs in each folder. To add music files, copy the MP3 files to the root of the SD card. Do not create any folder for now.

Once done, insert the SD card into the DFPlayer module.

Connect the power supply and then press the B1 (Play/Pause) or B2/B3 (Previous/Next) button once. It should start playing the MP3 file stored on the SD card.

If you long-press on B2, it will decrease the volume. Similarly, a long press on button B3 will increase the volume. A short press on B2 and B3 will switch between the previous or next track on the SD card respectively.

Step 5: Arrange the Player into a 3D Printed Case

Once you have tested and built a working DIY MP3 player, you may enclose it in a 3D printed case (such as the one suggested above) or any enclosure you can find on Thingiverse. You may also design one in Fusion 360.

Step 6: Integrate With Home Assistant

To integrate the DFPlayer or your DIY MP3 player with Home Assistant for smart home automation alerts, you will need a NodeMCU or D1 Mini and flash it with Tasmota or ESPHome firmware.

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You can use the Text to Speech converter tool to create mp3 voice alerts or notification alerts and paste those files to the root of your SD card or arrange them in a folder.

Then add automation in Home Assistant. For instance, you can choose a device trigger, such as a DIY smart ultrasonic water level sensor, choose the MP3 player in action, select payload (MP3 file number) to play when the tank is full or empty or reaches a certain level. You may also build a smart energy monitoring device for Home Assistant and play alerts when high power usage is detected.

Similarly, you add multiple automation for each event in Home Assistant that will play a voice alert through your DIY MP3 player.

Add Bluetooth Capability for Wireless Music

Additionally, you can get a Bluetooth transmitter, such as KCX BT EMITTER, and pair it with the DFPlayer’s DAC output to transmit and play audio to other Bluetooth-enabled audio systems, such as your headphones or Bluetooth soundbar. Similarly, you may pair a KCX BT003 Bluetooth receiver module with DFPlayer side-by-side to connect your smartphone and stream music wirelessly on your portable DIY MP3 player.

You may even include a microphone in the Bluetooth module to utilize the DIY MP3 player for voice calls.

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