For those of you who have been searching for a methodology of hooking up an Apple II to a TV via HDMI, Alex Lukacz’s latest experiment may be the answer you have been looking for. Using a BBBLack credit card sized computer, he has managed to wire up a reasonable connection allowing for the Apple //c video output to be displayed via HDMI.
For more information, check out Alex’s website at:
http://lukazi.blogspot.com.au/2015/08/a2-serial-video-to-hdmi-converter.html
UPDATE: A video demonstration of the hack has been posted by Alex at:
https://drive.google.com/file/d/0B5PVarmqxaOndHpZNVJldVZfdms/view?pli=1