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=planned
|status=done
|date=
|date=August 2018
|initiator=[[User:Mitja|Mitja]]
|initiator={{NL}}
|team={{HelpNeeded}}
|team={{NL}}
|materials=[[Raspberry Pi]], [[plywood]] or [[Acrylic Glass|acrylic glass]]
|tools=[[Raspberry Pi]]
|tools=[[Laser Cutter|laser cutter]]
|materials=[[Film Faced Plywood|film faced plywood]]
|software=undecided
|software=[https://github.com/NitramLegov/Musicbox Musicbox]
}}
}}
We would like to have a wifi-enabled music station to play songs in the [[Common Room|common room]] via an amplifier. We also have small speakers in nearly every room that we could integrate.
Since existing bluetooth speakers do not provide enough power, {{NL}} decided to build custom speakers for usage on the camping ground of different festivals.


Songs should be streamed from online services, web radio or a [[Project:NAS|NAS]].
== Software ==
This would be a great [[Raspberry Pi]] based project.
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


==Planned Features==
== Hardware ==
* Integrate the door bell
From an electronics perspective, the system uses a [[Raspberry Pi]] in combination with a [http://www.suptronics.com/xseries/x400.html X400 HAT].
* Multiroom System using the existing speakers (see [https://github.com/comakingspace/do-something/issues/2 issue #2])
It gets powered by a couple of lead batteries.
* Play Music from different sources (e.g. via mopidy)
* Play Music from Bluetooth devices
* Possibility to make announcements


== Software Options ==
The wiring is as follows:
* [https://www.mopidy.com/ Mopidy]
GPIO 22 & GND are connected to the shutdown button.
* [https://resin.io/blog/the-making-of-boombeastic/ resin.io] as base OS
GPIO 14 & GND are connected to the status LED.


==Todos==
* Create list of Hardware options
* Decide on Hardware to use
* Create and test door bell integration circuit


==Needed==
 
* 2 Raspberry Pis (1 for the [[Sound System|common room speakers]], 1 for the multiroom speakers)
The case is built with [[Film Faced Plywood|film faced plywood]]:
* Second IT person with Linux  / Raspberry pi knowledge
<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 16:14, 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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