I'm working with a camera with I/O pins, which I use to turn on lights.
The diagram, provided by the camera producer, shows two types of diodes. But what are they, and what are their purposes here?
I believe the one marked with blue is a Zener diode, and it allows current to flow from pin 6 to pin 4, but why?
The diode, which is marked with purple, I have no idea about.