Bluetooth speaker ground wire connected to 4N25

[StealthRT]

I am wondering if I can use a 4N25 optocoupler to turn on/off two small speakers. The reason for doing this is that when I turn on the unit, I won't have to hear "device connected". Side note: it's connecting with Bluetooth to my Amazon Echo Dot.

I currently have an Arduino checking for voltage on the LED that's in it. It has red, blue, orange and green. The blue has the highest volts at 2.1vdc while the red has 1.3vdc. That's how I determine if it has gone to sleep or not:

red = off/stand-by/sleep mode
blue = bluetooth
orange = usb
green = optical

Would I be able to hook both the right and left ground wires to one of these?

My thought is to turn the sound off during the time it reconnects to the Bluetooth (the "device connected") so that whenever it goes into sleep mode I can wake it up again without having to hear it, and then re-connect the ground wires back after a few seconds. This will happen after 10 minutes of sound not playing via the Amazon Echo Dot.

That's just how this Bluetooth speaker operates, which I dislike, but I don't want to purchase another one thinking that it too will have some sort of sleep mode, plus it's just more money to spend.



I am open to any other suggestion on how to do this some other way. This is just the only way I know how to combat this issue.

 

[rjenkinsgb]

What ground wires? Audio, power or some control signal?

 

[StealthRT]

Audio

 

[rjenkinsgb]

Sorry that would not work; you would still get any "difference" audio with ground isolated & it would not properly connect the ground for the wanted audio.

A FET output optocoupler such as H11F1 could work, but I think it would be better with one in series with each audio feed, rather than interrupting the ground.

The Arduino would then be enabling the audio connection rather than disabling it.