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USB mp3 player connection diagram

Update: At present I don’t have the SD card connector circuit diagram. Please don’t post in the comments asking for the circuit.

Long back in my blog I had posted how to make an USB mp3 player.

This mp3 player is made using a Chinese mp3 decoder board. Find more about the mp3 decoder board at
You don’t have to order it from china. It is available from most of the local electronic shops in INDIA. I don’t know about other countries.

The board is self explanatory. It has proper silk screen markings which shows how to connect. But still many had posted comments in my blog for the connection diagram of this board. I think it is hard for an electronics beginner to connect the board. So I thought of posting the connection diagram.

On the rear side of the board, there are three connectors.
They are for
1) Player buttons and IR sensor
2) USB and MMC/SD card interface
3) Power supply

For the board to play music, it needs a 5V DC power supply, USB port, 3.5mm stereo jack and an IR sensor to detect the signals from remote. You can also add switches to control songs, SD/MMC card slot, antenna for clear radio reception. All these are optional.

Connection diagram
USB MP3 connection diagram

The connection diagram doesn’t show how to connect an SD/MMC card socket. You can connect the SD/MMC to this player using an USB card reader.

Be careful while connecting the USB socket. If there is a connection mistake, it can damage your flash drive. Cross check the connection with the below image.
USB connector

Bill of Materials
MP3 Player board + Remote Controller
USB socket
3.5mm stereo jack
IR sensor (3.3v)
5V power supply
Switches (optional)
SD/MMC card socket (optional)

NOTE: This is not an open Hardware project because the circuit diagram and PCB layout is not available from the vendor 🙁

Posted in: Circuit, Electronics, Hacking | Tagged under: , , , , | 57 Comments


  1. sunil MonsterID Icon sunil
    Posted October 7, 2013 at 11:35 AM | Permalink

    Thanks for info….

  2. sunil vhatkar MonsterID Icon sunil vhatkar
    Posted November 4, 2013 at 2:29 PM | Permalink

    Just got a new version of this.. board number 01FV7.0… not sure if FM is supported, although there is an ANT point on the board. Please provide full connection diagram and how many buttons needed on this version.

  3. Posted December 30, 2013 at 12:15 PM | Permalink

    sir i would like to make usb player for my car but i can’t find amplifier ciruit diagram for it. so give me direction to make usb player for my car with connections..

  4. Shanthanu.K.J. MonsterID Icon Shanthanu.K.J.
    Posted January 6, 2014 at 1:34 PM | Permalink

    I have bot the VIRE -01FV3.0
    circuit, can you send me how to connect SD card to the circuit

  5. chhoton MonsterID Icon chhoton
    Posted July 20, 2014 at 7:34 PM | Permalink

    I have tried three such circuit boards. When I insert an USB device display shows USB but soon it transferred to FM and nothing in USB device say Micro SD card or Pendrive plays. can you please help me out to rectify the problem?
    Thanks in advance

  6. Mali Ajay MonsterID Icon Mali Ajay
    Posted November 19, 2014 at 3:54 PM | Permalink

    where is the radio antenna point?&how can I connect this a big speaker to this mp3 usb bord?
    help me please.

  7. Deepak sharna MonsterID Icon Deepak sharna
    Posted September 15, 2015 at 7:31 AM | Permalink

    The wiring of sensor is incorrect the middle pin is ground and the left is IR

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