【電子撚】DIY 自動音源選擇器

自動偵測音源、自動調整音量、防止器材間產生 ground loop (胡胡聲)....

Description
This is an automatic source switch between my computer or TV source to my desktop amplifier. A mixer or a simple audio detection switch won't work as I sometimes watch short videos on my computer during commercial on TV. The switching is based on threshold detection and a state machine implemented on STM32F030F4. Also automaticly reduces volume of loud audio.
https://hackaday.io/project/12133-automatic-audio-source-switching