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this post was submitted on 09 Oct 2026
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I need to do something similar. I have a Esp32S3 music player/ voice assistant connected to my old Yamaha, 90s AV receiver. It can change the volume knob via IR commands (cool integrated motor that physically turns the knob when the remote or HA changes the volume with IR).
I want to do something like put a ring magnet and an encoder on the tiny shaft or something to get position feedback to couple to HomeAssistant/musicassistant.
Some old Players got a needle that moved on a scale to show the current volume (and Channel if Radio). Do you have something like that? This could maybe be used to encode the current volume into HA via HAL or Ultrasonic sensors.