Project:Music Station: Difference between revisions

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{{ProjectInfoBox
{{ProjectInfoBox
|project title=Music Station
|project title=Music Station
|image=
|image=MusicStation 06.jpg
|status=Ready for usage
|status=done
|date=June 8th 2018
|date=August 2018
|initiator=[[User:Mitja|Mitja]]
|initiator={{NL}}
|team=[[User:NitramLegov|Martin]] [[User:Olaf|Olaf]]
|team={{NL}}
|tools=[[Raspberry Pi]]
|tools=[[Raspberry Pi]]
|software=[https://github.com/comakingspace/MusicController MusicController]
|materials=[[Film Faced Plywood|film faced plywood]]
|software=[https://github.com/NitramLegov/Musicbox Musicbox]
}}
}}
We have a wifi-enabled music station to play songs in the [[Common Room|common room]] via an amplifier.
Since existing bluetooth speakers do not provide enough power, {{NL}} decided to build custom speakers for usage on the camping ground of different festivals.


== Software ==
== Software ==
The Music playback is controlled by [https://www.mopidy.com/ Mopidy]. Any code for setting up mopidy for the needs of the CoMakingSpace can be found on [[https://github.com/comakingspace/MusicController|Github]].
The system is based on a regular Rasbian Lite installation, which gets adjusted by the installation script in the following way:
# Installation and configuration of mopidy and useful extensions
# Installation and configuration of bt_speaker


== Hardware ==
== Hardware ==
This project runs on a Raspberry Pi located in the [[Common Room]], next to the speakers and the printer.
From an electronics perspective, the system uses a [[Raspberry Pi]] in combination with a [http://www.suptronics.com/xseries/x400.html X400 HAT].
Right now, this is a Rapberry Pi 2.
It gets powered by a couple of lead batteries.


== Usage ==
The wiring is as follows:
As documented on the [[Network]] page, the Raspberry Pi provides a MPD Daemon on Port 6600 and a webinterface on port 8888.
GPIO 22 & GND are connected to the shutdown button.
It is able to playback Youtube videos (add it to the queue by using yt:''videoID''), but this is very slow and not recommended.
GPIO 14 & GND are connected to the status LED.
Webradio stations can also be played.


In case you want to add your own music, please use SSH to push Music into the folder /Music


== Further Improvements / things to donate ==
 
* Upgrade to a Raspberry Pi 3 in order to enable bluetooth playback
The case is built with [[Film Faced Plywood|film faced plywood]]:
* Add a dedicated Soundcard (USB or a [[https://www.raspberrypi.org/blog/introducing-raspberry-pi-hats/ HAT]]
<br clear="all"/>
<gallery mode=packed-hover heights=250>
File:MusicStation_09.jpg|First draft in [[SketchUp]]
File:MusicStation_10.jpg|First draft in [[SketchUp]]
File:MusicStation_01.jpg|The electronics arrived and had to be tested
File:MusicStation_02.jpg|Materials for building the box
File:MusicStation_03.jpg|First part done
File:MusicStation_04.jpg|The door got attached
File:MusicStation_05.jpg|Inside of the door
File:MusicStation_06.jpg|Box built
File:MusicStation_07.jpg|First test of the assembled box
File:MusicStation_11.jpg|Added some handles
File:MusicStation_08.jpg|And finally control buttons
</gallery>
 
 
== Further Improvements ==
===Check possibility to use a ESP32===
On the last Festival, I was mainly using the bluetooth functionality. Playback using Mopidy as well as the Wifi Hotspot was not really used. For bluetooth playback, a ESP32 should be enough. This should lower the needed power significantly.
 
===Shutdown board in case of power losses===
Since the system is powered by batteries, there is a possibility of sudden power outages due to a lack of remaining battery power. Therefore, there should be a circuit which either switches from one battery to another and then possibly sends a shutdown signal to the system.
 
Note: This is only needed for Raspberry Pi based systems.
 
===Different speaker===
So far the system is based on [https://www.visaton.de/en/products/drivers/coaxial-speakers/px-10-4-ohm Visaton PX-10 speakers]. Since they don't provide ''[https://de.wikipedia.org/wiki/Thiele-Small-Parameter Thiele/Small parameters]'', I didn´t calculate the needed box volume and just made a 12 liter box for each speaker, which is most likely way too much.
 
The next version should use different speakers where the ideal box volume is known.
 
===Make a workshop out of it===
Once the new design is complete and tested, there could be a [[seminar]] in which we teach others to build their own bluetooth speaker.
 
===Design a 3D-Printed front for the controls===


[[Category:Audio]]
[[Category:Audio]]
[[Category:Electronics]]
[[Category:Raspberry Pi]]
[[Category:Raspberry Pi]]
[[Category:Woodworking]]

Latest revision as of 17:14, 3 March 2021

ProjectInfoBox

Music Station

MusicStation 06.jpg
Status: done
Release Date: August 2018
Initiator: Martin
Team: Martin
Materials Used: film faced plywood
Tools Used: Raspberry Pi
Software Used: Musicbox


Since existing bluetooth speakers do not provide enough power, Martin decided to build custom speakers for usage on the camping ground of different festivals.

Software

The system is based on a regular Rasbian Lite installation, which gets adjusted by the installation script in the following way:

  1. Installation and configuration of mopidy and useful extensions
  2. Installation and configuration of bt_speaker

Hardware

From an electronics perspective, the system uses a Raspberry Pi in combination with a X400 HAT. It gets powered by a couple of lead batteries.

The wiring is as follows: GPIO 22 & GND are connected to the shutdown button. GPIO 14 & GND are connected to the status LED.


The case is built with film faced plywood:

  • First draft in SketchUp

    First draft in SketchUp

  • First draft in SketchUp

    First draft in SketchUp

  • The electronics arrived and had to be tested

    The electronics arrived and had to be tested

  • Materials for building the box

    Materials for building the box

  • First part done

    First part done

  • The door got attached

    The door got attached

  • Inside of the door

    Inside of the door

  • Box built

    Box built

  • First test of the assembled box

    First test of the assembled box

  • Added some handles

    Added some handles

  • And finally control buttons

    And finally control buttons


Further Improvements

Check possibility to use a ESP32

On the last Festival, I was mainly using the bluetooth functionality. Playback using Mopidy as well as the Wifi Hotspot was not really used. For bluetooth playback, a ESP32 should be enough. This should lower the needed power significantly.

Shutdown board in case of power losses

Since the system is powered by batteries, there is a possibility of sudden power outages due to a lack of remaining battery power. Therefore, there should be a circuit which either switches from one battery to another and then possibly sends a shutdown signal to the system.

Note: This is only needed for Raspberry Pi based systems.

Different speaker

So far the system is based on Visaton PX-10 speakers. Since they don't provide Thiele/Small parameters, I didn´t calculate the needed box volume and just made a 12 liter box for each speaker, which is most likely way too much.

The next version should use different speakers where the ideal box volume is known.

Make a workshop out of it

Once the new design is complete and tested, there could be a seminar in which we teach others to build their own bluetooth speaker.

Design a 3D-Printed front for the controls

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