Upcycled Filament Box Solar Eclipse Viewer
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Turn an empty filament box into a safe solar eclipse viewer! Quick, support-free print for a fun family STEM project.
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- Źródło
- Printables
- Kategoria
- Physics & Astronomy
- Licencja
- Creative Commons — Public Domain
Get ready for the solar eclipse with this quick, upcycled viewer! This 3D-printed cap is designed to slide perfectly over the cut end of a standard 1kg cardboard filament box (tested with Deeplee). It provides a secure mounting face for a foil projector and a dedicated viewing port, allowing you to safely watch the eclipse's progression.
It’s an incredibly fast, support-free print and a fantastic afternoon STEM project to put together with the kids just in time for the event.
Hardware & Materials Needed:
1x Empty cardboard filament box (designed around standard 1kg boxes)
A small square of aluminum foil
Tape (electrical or masking tape works best to block light)
A pin or needle
A piece of plain white paper
Assembly Instructions:
Prep the Box: Cut one of the short ends completely off your empty filament box.
Create the Screen: Cut a piece of white paper to size and tape it flat against the inside of the far end of the box. This acts as the projection screen for the sun.
Mount the Foil: Tape a small, flat square of aluminum foil over the circular cutout on the 3D-printed cap. Ensure the edges are sealed completely so no extra light gets in.
Make the Projector Hole: Carefully poke a single, tiny hole directly in the center of the foil using your pin or needle. The smaller and cleaner the hole, the sharper the projection of the sun will be.
Attach the Cap: Slide the cap onto the open end of the box. Use tape around the seam to secure it to the cardboard and seal up any potential light leaks.
How to Use Safely:
Never look directly at the sun through the foil hole or the viewing port.
Stand with your back to the sun. Point the foil end of the box over your shoulder directly at the sun. Look down into the large rectangular viewing port. You will see a safe, inverted projection of the solar eclipse crossing the white paper screen inside!
(For those in the UK viewing the August 12, 2026 eclipse: The sun will be quite low in the sky, so make sure you find a viewing spot with a clear, uninterrupted view of the western horizon!)