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Hackaday Podcast Episode 389, published October 2, 2026, pairs a maker-built spinning light-field display with Jenny List’s visit to Landschaftspark Duisburg-Nord, a former ironworks site preserved as a public park. The display uses a rotating perforated drum to direct different image views toward different angles; the destination story explores the surviving blast furnaces and industrial structures in Duisburg.
How the spinning light-field display works
In Hackaday’s September 29, 2026 feature, Electromechanical TV Goes 3D With This Light-field Display, the project adapts the scanning idea behind mechanical television for a three-dimensional effect. Rather than using a flat Nipkow disk, it rotates a perforated drum. LED matrix panels provide the image data, divided into views so that each opening in the drum sends the appropriate view toward a particular angle as it passes.
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Because viewers see different perspectives depending on their position, the display creates a light-field effect rather than showing one flat image to everyone. The panels remain stationary while the drum moves, and the project avoids using a costly laser projector. The mechanism makes the approach distinct from a conventional fixed screen, but it also introduces moving parts and limits the range of angles the demonstration can serve.
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What the demonstration’s figures mean
Hackaday describes three 32-by-64-pixel matrix displays arranged as half of a hexagonal prism. The feature reports an effective resolution through the drum of about 100 pixels by 48 pixels per eye. These are specifications reported in the project coverage, not independent measurements.
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The half-prism arrangement serves only part of the surrounding viewing space. A full 360-degree presentation would require additional screens; the cited feature does not give a complete design or performance specification for such an expanded version.
What the available description does not establish
The project feature does not publish a complete parts list or total build cost, and it does not report a measured refresh rate. Those omissions matter when assessing whether the design is practical to reproduce or comparing it with other displays. The documented idea is clear, but the published figures alone are not enough to determine the finished system’s cost, motion safety, or performance in a direct comparison with commercial products.
Rank #2
- Feathure: Concave Surface for Ball, Does not Rotate
- Easy to Use: Click Switch to Change Lighting Colors and Power Off, the Item does not Rotate
- 6 Color Modes: Colors Slow Flashing, Colors Quick Flashing, Constant White Light, Constant Red Light, Constant Blue Light, Constant Green Light.
- Power Supply: 3 AAA Batteries (not Included), Or, USB Power Cord (Not Include Charger)
- Multi Functional: Be Used to Display Crystal, Glass, Acrylic, Crystal Statues, Jewelry and Other Items.
Where Jenny List visited the blast furnace
The destination is Landschaftspark Duisburg-Nord, a park in Duisburg, Germany, built on the site of the former Thyssen ironworks. The works ceased operation in 1985. Jenny List’s September 28, 2026 article describes three preserved blast furnaces alongside associated ore-handling and gas-processing structures, offering visitors a close look at the remains of a major industrial site.
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Rank #3
- Feathure: Flat Top, Does not Rotate
- Easy to Use: Click Switch to Change Lighting Colors and Power Off, the Item does not Rotate
- 6 Color Lighting Modes: Colors Slow Flashing, Colors Quick Flashing, Constant White Light, Constant Red Light, Constant Blue Light, Constant Green Light.
- Power Supply: 3 AAA Batteries (not Included), Or, USB Power Cord (Not Include Charger)
- Multi Functional: Be Used to Display Crystal, Glass, Acrylic, Crystal Statues, Jewelry and Other Items.
What else is in Episode 389
The episode page, Hackaday Podcast Episode 389: Spinning Lightfield Displays, and Jenny Visits a Blast Furnace, names Elliot Williams and Jenny List as hosts. Its show notes also list an interferometric synthetic-aperture-radar drone update, a home-fabricated microprocessor, DOOM in a database server, an open-source tricorder, Vim as a whole computer, a Cheap Yellow Display PDA project, a JavaScript operating system for ESP32, quick hacks, and space coverage. The episode page supplies those topics as a map of the program; the display and park articles provide the details covered here.
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