IdeaWell

Project ideas from Hacker News discussions.

Making holograms with a pen plotter

Original Article

Hacker News Discussion

📝 Discussion Summary (Click to expand)

1. Clever use of everyday materials

"This is 'old Internet' style fun ... especially clever because it used something common and annoying to help describe how the plotter does its thing." — dejobaan

2. Reinvention of known phenomena & curiosity about the mechanism

"Related, 'abrasion holography', with great good success for being hand drawn: http://amasci.com/amateur/holo1.html" — nomel
"Before getting further into the article I thought maybe he was going to show how to use the plotter to control the oil smearing technique, which honestly would have been kind of cool." — radarsat1

3. Community‑driven enhancements and related work

"It would be interesting to augment the plotter with a Unimorph piezoelectric disk scanner [...] to enable finer movement so lines can be drawn closer together." — femto

🚀 Project Ideas

Generating project ideas…

OilRefraction Visualizer

Summary

  • A web app that lets users upload a fingerprint or vector shape and instantly generate a simulated oil‑droplet refraction pattern to visualize how a plotter’s ink spreads.
  • Provides an interactive preview that demonstrates the “old Internet” fun concept and makes the physics behind the technique accessible.

Details

Target Audience Educators, hobbyist physicists, makers
Core Feature Simulate oil‑refraction patterns from uploaded drawings; export PNG/GIF for sharing
Tech Stack React + Three.js + WebGL (frontend), Node.js (optional backend)
Difficulty Medium
Monetization Revenue-ready: Freemium (free basic sims, $5/mo for export & advanced patterns)

Notes

  • Appeals to dejobaan’s comment about using “something common and annoying” to illustrate the plotter’s effect.
  • Offers a practical classroom tool to demonstrate refraction without physical lab equipment.

MicroPlotter Piezo Upgrade Kit

Summary

  • A plug‑in hardware kit that adds a high‑resolution piezo scanner to existing desktop plotters, enabling sub‑millimeter line placement on oil surfaces.
  • Solves the need for finer movement mentioned by femto and expands the plotter’s capability for detailed holographic patterns.

Details

Target Audience DIY makers, educators, tinkerers
Core Feature Retrofit kit with custom PCB, 3D‑printed housing, and firmware to control ultra‑fine steps
Tech Stack Arduino/STM32, Open‑Source GRBL‑Lite firmware, 3D‑printed parts
Difficulty High
Monetization Revenue-ready: $79 kit price (hardware + documentation)

Notes

  • Directly references femto’s suggestion to augment with a Unimorph piezoelectric disk scanner.
  • Generates discussion in maker communities about improving precision for oil‑based holography.

AbrasionPattern Designer SaaS

Summary

  • A cloud service that converts uploaded images into oil‑abrasion (holographic) patterns ready for plotters, letting users swap pens for needles or other tools.
  • Addresses nomel’s observation about replacing a pen with a needle and expands on abrasion holography for creative use.

Details

Target Audience Artists, educators, hobbyist creators
Core Feature Image → vector path → oil‑abrasion parameters → export G‑code; includes simulation preview
Tech Stack Node.js backend, SVG path generation, React front‑end, Cloud storage
Difficulty Medium
Monetization Revenue-ready: $9/mo subscription

Notes

  • Echoes nomel’s comment about “abrasion holography” and the idea of swapping a pen for a needle.
  • Sparks conversation about new artistic techniques and provides a practical utility for generating custom patterns.

Read Later