Amplifier mod for Input control

ESPHome
1

I am looking at getting this amp and I want to control the input source based on entity status, for example,

When the TV turns on, it automatically switches to AUX1,
When the TV is off, and everything else is off, it automatically switches to AUX2
and so on.

I would plan to wire into the rotary dial where the input select is. Is it safe to assume that each input is just a short to GND to trigger? Anyone have experience with this or done anything similar?

Thanks

Media Player with Recorder FM Radio - Bluetooth Receiver - Sound Division & Surplustronics

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2

No. You will have to reverse engineer this to be sure.

3

Careful. This seems to be a simple media player with multiple inputs. I don’t think there’s any actual amplification going on.

If all you need is an input switcher, look for one which lets you switch inputs via remote (this one doesn’t). It’s easier & safer to send a remote command - that way if you mess something up there’s no risk of damaging the hardware.

4

I looked at automating signal switching like this, and the accepted solution seems to use a relay.

1 Like
5

No, but it’s relatively safe to verify it with multimeter.

6

I guess that approach would be similar to how this project controls and reads a multi-speed fan.

https://www.reddit.com/r/Esphome/comments/1bpeaol/made_my_vornado_fan_smart/

Shame the remote doesn’t control input.