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.
What kind of projection? DLP? LCD?
What’s confusing to me is the diode. It almost looks like a freewheeling diode for an inductive load, but I can’t imagine what that would be.
Could also be ESD protection, but I wouldn’t expect a large IR photodiode to need much ESD protection.
Also if it’s truly a passive component like a receiver, I’m surprised there isn’t any local components for filtering or amplification.
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.