Hello everyone,
This is my first post here so i appologize in advance if this not the right place to post !
So for a sound installation i have to come up with an "autonomous" sound player. The idea is that when people will come in front of the installation, the music will need to start, either by pushing a button or by detecting their presence, and then stop when no one is around/loop if people are still around at the end of track. Here are some more infos :
- The hardware will be hidden inside the installation.
- It will be a "permanent' instal so it needs to be reliable in the long run.
- It should play .wav from an SD card.
- It should have two powered speakers.
- It should be started easily, by anyone, by just pressing an ON switch and the whole system must be ready.
Is there a solution on the market that i'm not aware off that would fit my needs ? Or do i need to do it myself with circuit boards such as those ones : https://www.amazon.fr/Récepteur-damplificateur-puissance-numérique-Bluetooth/dp/B075N8F4YD
I'd take any kind of help, thanks for your time !
This is my first post here so i appologize in advance if this not the right place to post !
So for a sound installation i have to come up with an "autonomous" sound player. The idea is that when people will come in front of the installation, the music will need to start, either by pushing a button or by detecting their presence, and then stop when no one is around/loop if people are still around at the end of track. Here are some more infos :
- The hardware will be hidden inside the installation.
- It will be a "permanent' instal so it needs to be reliable in the long run.
- It should play .wav from an SD card.
- It should have two powered speakers.
- It should be started easily, by anyone, by just pressing an ON switch and the whole system must be ready.
Is there a solution on the market that i'm not aware off that would fit my needs ? Or do i need to do it myself with circuit boards such as those ones : https://www.amazon.fr/Récepteur-damplificateur-puissance-numérique-Bluetooth/dp/B075N8F4YD
I'd take any kind of help, thanks for your time !
Look for FM radio module...they have player built in.
$5 and up with remote here in India...
No OS, plays MP3 only, no others like FLAC or Ogg Vorbis, they do play .wav files... module needs 5V 50 mA supply...battery charger from old cell phone is good enough.
Or build one, the FM module (with Bluetooth, SD and USB player, and external input) included, costs like $1.50 here, and you can add amplifier.
Be creative, here some are built into portable fan / light...same battery!
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Someone's probably done something just like this with a Teensy (Arduino-like microcontroller board). Microcontrollers are more reliable than anything with an O.S., far less to go wrong.
My take on wav playing on Teensy 4: https://forum.pjrc.com/index.php?threads/my-attempt-at-a-multirate-wav-file-player.68708/
As for the presence detection side of things, I've used these microwave boards with good success in the past:
Microwave Presence sensor (RCWL-0516)
They are cheap and easy to implement, have a wide input voltage range and a 3.3v Hi/Lo which can usually interface directly with a microcontroller board.
Microwave Presence sensor (RCWL-0516)
They are cheap and easy to implement, have a wide input voltage range and a 3.3v Hi/Lo which can usually interface directly with a microcontroller board.