Hardware volume control for VIM3?

VIM3
1

I recently changed my order of a VIM3L to a VIM3 Basic for use in my CarPC project. I want to install a hardware volume control on the front panel of the enclosure and I assume that I will use a rotary encoder connected to the GPIO…but I am just guessing about that. I have searched the threads for information on this but found nothing, does anyone know how I would go about this?

Thanks for any help.

2

Hi @Donanon:
You can use any of the GPIO for the encoder, following reference with a button FYI:
image

Have fun!

1 Like
3

Thank you Gouwa. Will I have to do any programing to enable the encoder for volume control? I am a compete noob at all this.

5

Yes, have to, but quite simple :wink:

6

Thanks Gouwa, would you please post the code or a link to docs. for it?

7

And by the way, I want to use SPDIF out to my DSP and I think I use GPIO pins 13 and 14 for that. Do I need to do any programming to make SPDIF output work or can I just plug and play?

8

Hello, If you are running Android, you may have to select SPDIF in the audio settings.
Pin 13 for SPDIF signal,
Pin 14 for Ground.

9

Thanks RDFTKV. Yes, I will be running Android and my plan is to use USB Audio Player PRO to play the music files on the VIM3.

10

Actually now that I have spent some more time reading I am thinking of installing LibreELEC and using Kodi to play my music files. Has anyone done this?

11

I have not tried it recently, however, it can be boot/run from an SD card without altering the installed OS. So trying it is no risk.

Also, Volumio is a popular OS for audio playback. While I do not think it is available for the VIM3 yet, it may come in the future.