avr-hdmi-cec-volume
avr-hdmi-cec-volume copied to clipboard
Published
20 hours ago •
tsowell
tsowell
AVR code to operate a motorized potentiometer in response to HDMI CEC volume messages from a TV
Code for an ATTINY4313 to operate a motorized volume potentiometer in response to HDMI CEC volume commands sent from a TV. It might be useful as a reference for someone implementing the CEC protocol on an AVR.
This was part of a project to add remote volume control to a Pioneer SX-950 receiver. The project is described in more detail at https://blog.ldtlb.com/2020/10/14/pioneer-sx950-hdmi-cec-volume.html
See schematic.svg for the hardware configuration.
It has only been tested with an LG OLED65B6P.
tsowell