With some clever hacks and fast IO work, it’s possible to get your average garden-variety microcontroller to output some form of video. Old analog standards like composite and VGA are just slow ...
The result converts RGB and sync data for VGA into DIV-D. Since DVI-D and HDMI both use the same signals for video, this can be connected to either input on a monitor or TV. This implementation ...
The best modern TVs come with a few HDMI 2.1 and 2.0 ports to help you connect all your devices together, but if that's not enough, or you want greater control without reaching behind the TV ...