I feel like they probably have something to do with light level detection or infrared signal receiving but I genuinely have no idea. They could just as likely be part of the sound system for all I know.
I feel like they probably have something to do with light level detection or infrared signal receiving but I genuinely have no idea. They could just as likely be part of the sound system for all I know.
The diode is a zener- it basically clamps the voltage.
https://en.m.wikipedia.org/wiki/Zener_diode
Yeah, but trying to figure out what it’s for in this circuit. I suppose it could just be ESD.