Description

It’s just a small project. A friend of mine asked me, for an mp3 player, which each time you close a contact, plays randomly a song.
The raspberry pi was predestinated for this. The sound output of the Pi is not optimal, so I used a 7$ USB Soundcard.

Video

no action, but informative

Part List

  • 1 Raspberry Pi
  • 1 USB Soundcard
  • 1 USB Flash Drive
  • 1 Micro Sd Card
  • 1 Power Supply
  • 1 Enclosure

Software

The pi is running on Arch Linux (booting up in under 25sec). You also need python 3.5, the RPI.GPIO package and mpg123

In the home directory you need this 3 files. You can find them here GitHub

  • play.py (main program)
  • mp3.sh (play the mp3)
  • system.mp3 (sound file)

create a folder “mp3” on the flash drive and copy all the needed mp3’s in it

Start on boot

Create a file under /usr/lib/systemd/system and name it “playmp3.service”

Copy this inside the file you just created:

[Unit]
Description=PlayMP3
After=multi-user.target

[Service]
Type=idle
ExecStart=/usr/bin/python /home/play.py

[Install]
WantedBy=multi-user.target

To run the system on boot, do the following:

systemctl enable playmp3.service

Now create this directory mkdir /mnt/usb 

open the file /etc/fstab and add the following line:

/dev/sda1 /mnt/usb

Ready to use

Shorting the GPIO 17 with the ground, makes the thing do what the thing should do.

20161219_112626

To the german version

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s