I'm trying something new, I'm trying a let's learn / let's code series.  This one is about NTSC. And the basics.  If you haven't already watched the learn portion, I recommend you do so.

This is the page that I referenced when I was learning NTSC: http://www.kolumbus.fi/pami1/video/pal_ntsc.html

Source code is available here:
https://github.com/cnlohr/avrcraft