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Posted by codetheweb 1/23/2026

I built a light that reacts to radio waves [video](www.youtube.com)
https://rootkid.me/works/spectrum-slit
485 points | 105 commentspage 3
sergioisidoro 1/23/2026|
I just watched all the other videos of their pieces, and all of them are absolutely amazing conceptual explorations of our relationship with technology. Really amazing stuff
SiempreViernes 1/23/2026|
The bit in the phone project where he cuts out the poem authors intro seems a bit scummy though, all that work he's making uncredited... then he finishes the video by showing him signing the piece.

I guess it's a good commentary on how tech people value other peoples work.

curiousgal 1/23/2026|||
I wasn't surprised by that, I studied in one of the best schools in France and that attitude was prevalent amongst students.
fanatic2pope 1/23/2026|||
Indeed, and the final result isn't particularly good as an art piece.
shawn10067 1/23/2026||
This is such a neat project. The idea of translating invisible radio waves into visible light is mesmerizing — it feels like giving your surroundings a new sensory dimension.
nerdsniper 1/24/2026||
I often would love a camera similar to acoustic cameras / night vision cameras, but for RF. Like portable synthetic aperture radar.
smellington 1/23/2026||
Very appropriate soundtrack too:

https://youtu.be/B_gLxVZuk60

Uranium by Radioactiveman

tzvc 1/23/2026|
I had to dig deeep in my soundcloud to find it!
pringularity 1/23/2026||
The lights sort of did this already on accident, but making a more robust audio-output version of this would be fascinating as well.
alansaber 1/23/2026||
I'm glad we can all agree this is really cool
consumer451 1/23/2026|
Yeah, same here. Also, I can't recall a time since back when I used to make music that I got actually jealous of someone else's abilities, but here I am. :)
sush1612 1/23/2026||
you have everything right in front of your eyes, next if you add a transformer which convers these light signals into what they actually are then Voilà, you can see what's travelling in the air (Photos, conversations, music)
levidos 1/23/2026|
Except it’s encrypted with TLS
sush1612 1/23/2026||
not far away
cush 1/23/2026||
The sounds were so cool -straight out of sci-fi movie.
nickcw 1/23/2026|
Traditional fix for coil hum is a blob of glue from a hot glue gun.

It is fun making it part of the show though.

m3kw9 1/23/2026|
would look good if he put a heavily frosted material infront. Right now is gonna cause more headaches than a 5g transmitter in your room
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