Video trigger generator for oscilloscope

Last update for this project for now. It works well and served as a proof of concept. This was a good exercise to use the on-chip peripheral for generating a trigger output for an oscilloscope. It uses only a Microchip ATmega328PB, a few swiches and components.

I won't be needing this for myself anymore since I have a scope with this feature built-in.

I finally made this project work after much head scratching.

The result is a stable trigger output for any scope. This version uses common push button switches.

The design could use capacitive switches instead with the Q switch library. To be tried next.