Project upside-down images with a pinhole
A camera obscura: tape tracing paper over the open back, point the pinhole at a bright window or a sunny street, and an upside-down picture appears on the paper. A dark cloth over your head helps.
Prints as shown on its floor, no supports. The lid prints as a separate part, top down.
Filament: at most about 113 g of PLA printed solid (roughly $2.27 at $20 per kg); normal infill uses less.
To get the files, open it in the generator and choose File › Download STL (one file per part) or Download 3MF (every part on one plate).
The pinhole viewer model measures 110 × 170 × 110 mm (width × depth × height). You can change every size in the free SO3D.xyz generator before you download it.
No. Prints as shown on its floor, no supports. The lid prints as a separate part, top down.
At most about 113 g of PLA (91.5 cm³ printed solid), roughly $2.27 of filament at $20 per kg. Normal infill uses less.
2 parts. The download lays each part flat in its best print position: Download STL gives one file per part, Download 3MF puts them all on one plate.
Yes. Open it in the SO3D.xyz generator (free, in your browser), change the size, walls, dividers, holes, text or anything else, then download it as STL or 3MF for your slicer.
Change the size, walls, dividers, holes and labels of the pinhole viewer model in your browser, then download it for your printer. Free, no CAD needed.
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