Hello potential lag tester! This is an extremely long overdue post but I guess it's better late than never. What feels like an incredibly long time ago, I wrote an article about lag ( http://www.meleeitonme.com/this-tv-lags-a-guide-on-input-and-display-lag/ ). Some time after that I refined my technique to get even more accurate numbers, I did this by designing a board and homebrew app combination that could detect audio/video sync differences between different monitors. I made a demonstration video sometime later ( https://www.youtube.com/watch?v=UTNUIQtreXQ ).Anyway, at the time of writing I've been working at smashgg for about a year. I have very little free time and quite frankly can spend almost none of it helping people build lag testers, or test lag myself on a variety of set ups. Because of this I wanted to open up everything I did to the public so that hopefully others can replicate it. The ideal scenario for me would be that this stuff takes on a life of it's own and you guys can help each other to refine lag testing techniques.Anyway, without further ado, here is the github link where I have recently updated the readme and organized the files: https://github.com/JLaferri/LagTestHomebrew/ . Currently the most recent eagle file is missing so I'll try to find that if I can, otherwise everything else should be there. You can still get boards made by clicking the osh park link and download the gerbers from there if you'd like to use a different fab.