alt.hn

6/3/2026 at 1:33:00 PM

I built a ceiling projection mapping of the planes flying over my house

https://old.reddit.com/r/nextfuckinglevel/comments/1tvmcin/i_live_in_the_take_off_path_of_sfo_and_built_a/

by frereubu

6/3/2026 at 2:54:34 PM

The repo subtitle is `Project the aircraft passing overhead onto your ceiling, in real time — an X-ray through the roof.`

The demo video starts outside pointing at a cloudy sky with an airplane passing overhead. My mind, seeded with the word "x-ray", thought the outside shot was the video projection on his ceiling. I thought his rain gutters were crown molding, and when the camera man runs inside, I thought he was running outside to show the real life airplane.

The actual projection is neat, but how fun would it be to have an x-ray projection of the night sky.

by waltbosz

6/3/2026 at 3:49:09 PM

Thought the same thing. Would be super cool to project the night sky with procedurally generated cellestial objects, planes, spaceships, etc.

by jasondigitized

6/3/2026 at 5:55:56 PM

I can't imagine it would take too much to pull that sort of real information, no? Like, what celestial objects are overhead, constellations, satellites, etc

by matchstickman23

6/3/2026 at 4:55:14 PM

I thought the same thing! The plane being so low made it seem like an exaggerated computer-generated plane.

by evan_

6/3/2026 at 3:37:59 PM

I thought the same exact thing and I thought that I would love a sky projection on my ceiling

by culopatin

6/3/2026 at 3:26:17 PM

> The actual projection is neat, but how fun would it be to have an x-ray projection of the night sky.

Something like Sega Toys Homestar?

by notpushkin

6/3/2026 at 2:26:31 PM

It's a planeatarium

by unzadunza

6/3/2026 at 2:43:43 PM

I bought several 3b+ Raspberries a really long time ago and this seems like the perfect simple&breathtaking project for such ancient hardware. Who needs a fourth PiHole on their local network?!

"Fortunately" I live directly beneath CHA's main landingstrip, so lots of regular data available. Fortunately, I am not in the main takeoff path because that would be much worse.

by ProllyInfamous

6/3/2026 at 3:26:54 PM

I've got a Raspberry Pi 2b I've been using for probably close to a decade, with two SDRs hanging off it, pulling aircraft ADS-B locations and VHF radio transmissions out of the sky. It's a great application for this platform. ADS-B scanner averages about 25% CPU and the VHF airband receiver averages about 17% (uses hardware FFT).

by ryandrake

6/3/2026 at 4:08:15 PM

Such a fan of the lower power, fanless, larger/‘regular’ connectors old school rapi’s.

by thenthenthen

6/3/2026 at 5:31:13 PM

[dead]

by theturtle

6/3/2026 at 1:58:18 PM

Wow so cool! I had daydreamed about doing something similar with e-ink display on my wall so I could see details about whatever plane I'm hearing.. but this blows that out of the water.

by mikeweiss

6/3/2026 at 5:22:00 PM

The fact that I saw this on X first is concerning, greatjob btw

by razorson

6/3/2026 at 3:59:47 PM

Oof that looks like a loud place to live :O Happy to see it inspiring a project tho take care

by thenthenthen

6/3/2026 at 2:04:52 PM

I'm sensing "The Conversation" levels of paranoia and it is beautiful.

by JKCalhoun

6/3/2026 at 4:57:53 PM

Random aside: there’s a restaurant in San Diego on the SAN flight path with a split flap display over the bar. Every time a flight passes over it updates to show flight number and departure airport. It’s quite neat.

by DoneWithAllThat

6/3/2026 at 5:52:22 PM

Do you remember the name? Would love to visit it

by Abh1Works

6/3/2026 at 2:51:34 PM

(To be clear, the "I" in the title is not me, the submitter - it's the title of the Reddit post).

by frereubu

6/3/2026 at 3:19:28 PM

Not too many things make my jaw literally drop, but this did. This is magnificent!

by rootusrootus

6/3/2026 at 4:15:38 PM

I expect to have trouble falling asleep just vicariously relating to the noise level there. Awesome project though.

by gruntled-worker

6/3/2026 at 2:49:19 PM

That is cool!

by bronlund

6/3/2026 at 2:45:29 PM

This is so awesome

by eben-vranken

6/3/2026 at 3:07:13 PM

[dead]

by dfilppi