Transmitting analog video via photons is old hat: that’s how everything started, after all, back in the day with over-the-air TV. The project is documented quite well on GitHub as linked above, as well as on Instructables, and Hackaday.io, and in a YouTube video we’ve embedded below so you can see it in action. In principle it’s pretty simple: a Raspberry Pi is used to generate the composite video signal, which modulates a red laser diode through a 2N2222 NPN transistor and some passives. It’s not the weirdest way we’ve seen people hack analog video signals– there’s no audio cassettes to be seen, and the signal isn’t even SECAM, the oddest encoding— but that’s not a slight. Transmitting video with higher-than-normal-frequency photons might not be that weird, but it looks like a lot of fun.