When I first saw the video by Charles Lohr (a certified genius IMO) I had to spend several minutes trying to get my head around what he had done.
Using the DAC he bit bangs a signal at just the right frequency to match NTSC channel 3 which gets picked up as a TV/radio signal by the TV and displays it. Charles ensures the bits that generate the radio signal match the requirements of the NTSC spec.
Then he displays 3d graphics over that NTSC broadcast signal. Then he adds NTSC color.
That is software defined broadcast television. Mind. Blown.
I started collecting old TV's being dumped out the front of houses for hard waste collection after I saw that video, so I could give it a try.
Using the DAC he bit bangs a signal at just the right frequency to match NTSC channel 3 which gets picked up as a TV/radio signal by the TV and displays it. Charles ensures the bits that generate the radio signal match the requirements of the NTSC spec.
Then he displays 3d graphics over that NTSC broadcast signal. Then he adds NTSC color.
That is software defined broadcast television. Mind. Blown.
I started collecting old TV's being dumped out the front of houses for hard waste collection after I saw that video, so I could give it a try.
And the esp8266 CPU costs about $4