IdeaWell

Project ideas from Hacker News discussions.

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

Original Article

Hacker News Discussion

📝 Discussion Summary (Click to expand)

Key Themes from Discussion

  1. "X-Ray" Plane Tracking Aesthetic
    Users emphasize the cinematic appeal of projecting aircraft as an "X-ray through the roof" onto ceilings.

    "The repo subtitle is Project the aircraft passing overhead onto your ceiling, in real time — an X-ray through the roof." (waltbosz)
    "How fun would it be to have an x-ray projection of the night sky." (notpushkin)

  2. Retro Hardware Nostalgia
    Nostalgic appreciation for older devices like Tidbyt/Tronbyt and Raspberry Pis, paired with creative uses for e-ink displays.

    "I had daydreamed about doing something similar with e-ink display on my wall." (mikeweiss)
    "It's a planeatarium." (unzadunza)

  3. Low-Power Raspberry Pi Projects
    Enthusiasm for leveraging aging hardware (e.g., Pi 2B) for ambitious tasks like real-time ADS-B tracking with minimal CPU usage.

    "It's a great application for this platform. ADS-B scanner averages about 25% CPU." (ryandrake)
    "Perfect simple&breathtaking project for such ancient hardware." (ProllyInfamous)

Summary: The thread celebrates technical creativity blending retro aesthetics, real-time flight tracking, and resourceful use of legacy hardware.

🚀 Project Ideas

CeilingSky Projection Kit

Summary

  • Plug‑and‑play open‑source kit that turns any ceiling into a real‑time sky map showing aircraft, satellites, and constellations.
  • Core value: lets users watch the night sky and flight traffic without leaving home.

Details| Key | Value |

|-----|-------| | Target Audience | Tech‑savvy hobbyists, plane‑spotters, and home‑automation enthusiasts | | Core Feature | Real‑time celestial & flight overlay with optional AR night‑sky mode | | Tech Stack | Python, Node‑RED, ADS‑B Exchange API, Stellarium, DLP mini‑projector, Raspberry Pi 4 (1 GB) | | Difficulty | Medium | | Monetization | Revenue-ready: Subscription: $5/mo for premium satellite & flight alerts |

Notes

  • HN users repeatedly mentioned craving “x‑ray projection of the night sky” and love low‑power fanless setups.
  • Could spark community projects and integrate with existing Tidyby/Tronbyt hardware.

NightSky Ceiling AR

Summary

  • An AR‑enabled smartphone app that projects a realistic night‑sky overlay (stars, satellites, planes) onto any ceiling via the camera.
  • Core value: instant immersive sky experience without specialized hardware.

Details

Key Value
Target Audience Urban dwellers, stargazers, and interior designers
Core Feature Camera‑based ceiling mapping + real‑time celestial data from Heavens‑Above API
Tech Stack Flutter, Dart, Heavens‑Above API, ARCore/ARKit, Firebase
Difficulty High
Monetization Revenue-ready: One‑time purchase $4.99 + in‑app purchases for premium constellations

Notes

  • Comments like “Would be super cool to project the night sky” show strong interest.
  • Potential discussion around AR tech and privacy of overhead data.

RetroE‑Ink Flight Billboard

Summary

  • Modular e‑ink wall‑display kit that shows overhead aircraft, flight numbers, and basic weather, aimed at retro‑Pi users who miss classic LCD read‑outs.
  • Core value: nostalgic, low‑power visual status board for home offices or workshops.

Details

Key Value
Target Audience Raspberry Pi hobbyists, retro‑tech collectors, minimalist desk‑setup users
Core Feature Plug‑in e‑ink panel that updates every 30 s with ADS‑B data fetched from PlaneFinder API
Tech Stack Python, Flask, e‑ink 7.5" breakout, GPIO, ADS‑B Exchange, Docker
Difficulty Low
Monetization Hobby

Notes

  • Several users lamented having “ancient” Pi 3/4 and want simple projects; “Who needs a fourth PiHole?” shows appetite for low‑effort hardware.
  • Could become a talking point on /r/raspberry_pi and spark DIY customization.

Read Later