Smartphone projector with focus slots — 3D-printable model preview

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Photography & film Multi-part assembly

Smartphone projector with focus slots

Project a phone screen onto a wall through a magnifying lens

A shoebox cinema, done properly. A magnifying lens fits over the round front port, and the phone stands upright in one of four numbered focus slots inside. Moving it back a slot focuses the picture on the wall like a slide projector, with no sliding parts. The lid blacks out the box so the image is as bright as possible. Lights off, film on.

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Size: 180 × 150 × 120 mm
Shape: Rectangular
Walls: 2.4 mm
Volume: 387 cm³
Est. weight (PLA): 480 g
Parts to print: 2
Category: Photography & film
Made by: Krypto
Built in: 69 steps

What’s in it

Rectangular, 180 × 150 × 120 mm, with 2.4 mm walls
4 dividers
1 hole in the walls
Raised text: “1”, “2”, “3”, “4”, “FOCUS”
Lift-off lid (prints separately)

How to print it

Fit a 60-100 mm magnifying lens over the front port, turn the phone image upside down, and lock its rotation; try each slot until the picture is sharp.

Prints as shown on its floor, no supports. Large holes in the walls may need supports or good bridging. The lid prints as a separate part, top down.

Filament: at most about 480 g of PLA printed solid (roughly $9.61 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).

Questions

What size is the smartphone projector with focus slots model?

The smartphone projector with focus slots model measures 180 × 150 × 120 mm (width × depth × height). You can change every size in the free SO3D.xyz generator before you download it.

Does it need supports?

It may need supports in places. Fit a 60-100 mm magnifying lens over the front port, turn the phone image upside down, and lock its rotation; try each slot until the picture is sharp. Prints as shown on its floor, no supports. Large holes in the walls may need supports or good bridging. The lid prints as a separate part, top down.

How much filament does it use?

At most about 480 g of PLA (387 cm³ printed solid), roughly $9.61 of filament at $20 per kg. Normal infill uses less.

How many parts does it print as?

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.

Can I change it?

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.

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Make it fit your space

Change the size, walls, dividers, holes and labels of the smartphone projector with focus slots model in your browser, then download it for your printer. Free, no CAD needed.

Customize this model